[rtems-libbsd commit] Added userspace db files.
Jennifer Averett
jennifer at rtems.org
Wed Sep 12 15:55:46 UTC 2012
Module: rtems-libbsd
Branch: master
Commit: e4e17463bba4d93727d0fe09347ed6d4cecd67ee
Changeset: http://git.rtems.org/rtems-libbsd/commit/?id=e4e17463bba4d93727d0fe09347ed6d4cecd67ee
Author: Jennifer Averett <jennifer.averett at oarcorp.com>
Date: Wed Sep 12 10:59:41 2012 -0500
Added userspace db files.
---
freebsd-userspace/Makefile | 29 +
freebsd-userspace/include/mpool.h | 113 +++
freebsd-userspace/lib/libc/db/btree/bt_close.c | 180 +++++
freebsd-userspace/lib/libc/db/btree/bt_conv.c | 214 ++++++
freebsd-userspace/lib/libc/db/btree/bt_debug.c | 318 ++++++++
freebsd-userspace/lib/libc/db/btree/bt_delete.c | 637 ++++++++++++++++
freebsd-userspace/lib/libc/db/btree/bt_get.c | 101 +++
freebsd-userspace/lib/libc/db/btree/bt_open.c | 453 +++++++++++
freebsd-userspace/lib/libc/db/btree/bt_overflow.c | 218 ++++++
freebsd-userspace/lib/libc/db/btree/bt_page.c | 96 +++
freebsd-userspace/lib/libc/db/btree/bt_put.c | 316 ++++++++
freebsd-userspace/lib/libc/db/btree/bt_search.c | 202 +++++
freebsd-userspace/lib/libc/db/btree/bt_seq.c | 443 +++++++++++
freebsd-userspace/lib/libc/db/btree/bt_split.c | 798 ++++++++++++++++++++
freebsd-userspace/lib/libc/db/btree/bt_utils.c | 248 ++++++
freebsd-userspace/lib/libc/db/btree/btree.h | 380 ++++++++++
freebsd-userspace/lib/libc/db/btree/extern.h | 67 ++
freebsd-userspace/lib/libc/db/db/db.c | 96 +++
freebsd-userspace/lib/libc/db/mpool/mpool-compat.c | 43 ++
freebsd-userspace/lib/libc/db/mpool/mpool.c | 495 ++++++++++++
freebsd-userspace/lib/libc/db/recno/extern.h | 51 ++
freebsd-userspace/lib/libc/db/recno/rec_close.c | 184 +++++
freebsd-userspace/lib/libc/db/recno/rec_delete.c | 189 +++++
freebsd-userspace/lib/libc/db/recno/rec_get.c | 293 +++++++
freebsd-userspace/lib/libc/db/recno/rec_open.c | 240 ++++++
freebsd-userspace/lib/libc/db/recno/rec_put.c | 277 +++++++
freebsd-userspace/lib/libc/db/recno/rec_search.c | 123 +++
freebsd-userspace/lib/libc/db/recno/rec_seq.c | 129 ++++
freebsd-userspace/lib/libc/db/recno/rec_utils.c | 114 +++
freebsd-userspace/lib/libc/db/recno/recno.h | 36 +
30 files changed, 7083 insertions(+), 0 deletions(-)
diff --git a/freebsd-userspace/Makefile b/freebsd-userspace/Makefile
index f5a2518..5a0786b 100644
--- a/freebsd-userspace/Makefile
+++ b/freebsd-userspace/Makefile
@@ -16,6 +16,9 @@ CFLAGS += -I../services/librpc/include
CFLAGS += -I$(INSTALL_BASE)/include
+#Only Needed for db files
+CFLAGS += -D__DBINTERFACE_PRIVATE
+
CFLAGS += -w
CFLAGS += -std=gnu99
CFLAGS += -MT $@ -MD -MP -MF $(basename $@).d
@@ -87,6 +90,32 @@ C_FILES += lib/libc/isc/ev_timers.c
C_FILES += lib/libc/stdio/fgetln.c
+C_FILES += lib/libc/db/db/db.c
+C_FILES += lib/libc/db/btree/bt_close.c
+C_FILES += lib/libc/db/btree/bt_get.c
+C_FILES += lib/libc/db/btree/bt_put.c
+C_FILES += lib/libc/db/btree/bt_utils.c
+C_FILES += lib/libc/db/btree/bt_conv.c
+C_FILES += lib/libc/db/btree/bt_open.c
+C_FILES += lib/libc/db/btree/bt_search.c
+C_FILES += lib/libc/db/btree/bt_debug.c
+C_FILES += lib/libc/db/btree/bt_overflow.c
+C_FILES += lib/libc/db/btree/bt_seq.c
+C_FILES += lib/libc/db/btree/bt_delete.c
+C_FILES += lib/libc/db/btree/bt_page.c
+C_FILES += lib/libc/db/btree/bt_split.c
+C_FILES += lib/libc/db/recno/rec_close.c
+C_FILES += lib/libc/db/recno/rec_get.c
+C_FILES += lib/libc/db/recno/rec_put.c
+C_FILES += lib/libc/db/recno/rec_seq.c
+C_FILES += lib/libc/db/recno/rec_delete.c
+C_FILES += lib/libc/db/recno/rec_open.c
+C_FILES += lib/libc/db/recno/rec_search.c
+C_FILES += lib/libc/db/recno/rec_utils.c
+
+
+C_FILES += lib/libc/db/mpool/mpool.c
+
# RTEMS Specific Files
# C_FILES += rtems/rtems-net-setup.c
C_FILES += rtems/syslog.c
diff --git a/freebsd-userspace/include/mpool.h b/freebsd-userspace/include/mpool.h
new file mode 100644
index 0000000..c74764d
--- /dev/null
+++ b/freebsd-userspace/include/mpool.h
@@ -0,0 +1,113 @@
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)mpool.h 8.4 (Berkeley) 11/2/95
+ * $FreeBSD$
+ */
+
+#ifndef _MPOOL_H_
+#define _MPOOL_H_
+
+#include <sys/queue.h>
+
+/*
+ * The memory pool scheme is a simple one. Each in-memory page is referenced
+ * by a bucket which is threaded in up to two of three ways. All active pages
+ * are threaded on a hash chain (hashed by page number) and an lru chain.
+ * Inactive pages are threaded on a free chain. Each reference to a memory
+ * pool is handed an opaque MPOOL cookie which stores all of this information.
+ */
+#define HASHSIZE 128
+#define HASHKEY(pgno) ((pgno - 1 + HASHSIZE) % HASHSIZE)
+
+/* The BKT structures are the elements of the queues. */
+typedef struct _bkt {
+ TAILQ_ENTRY(_bkt) hq; /* hash queue */
+ TAILQ_ENTRY(_bkt) q; /* lru queue */
+ void *page; /* page */
+ pgno_t pgno; /* page number */
+
+#define MPOOL_DIRTY 0x01 /* page needs to be written */
+#define MPOOL_PINNED 0x02 /* page is pinned into memory */
+#define MPOOL_INUSE 0x04 /* page address is valid */
+ u_int8_t flags; /* flags */
+} BKT;
+
+typedef struct MPOOL {
+ TAILQ_HEAD(_lqh, _bkt) lqh; /* lru queue head */
+ /* hash queue array */
+ TAILQ_HEAD(_hqh, _bkt) hqh[HASHSIZE];
+ pgno_t curcache; /* current number of cached pages */
+ pgno_t maxcache; /* max number of cached pages */
+ pgno_t npages; /* number of pages in the file */
+ unsigned long pagesize; /* file page size */
+ int fd; /* file descriptor */
+ /* page in conversion routine */
+ void (*pgin)(void *, pgno_t, void *);
+ /* page out conversion routine */
+ void (*pgout)(void *, pgno_t, void *);
+ void *pgcookie; /* cookie for page in/out routines */
+#ifdef STATISTICS
+ unsigned long cachehit;
+ unsigned long cachemiss;
+ unsigned long pagealloc;
+ unsigned long pageflush;
+ unsigned long pageget;
+ unsigned long pagenew;
+ unsigned long pageput;
+ unsigned long pageread;
+ unsigned long pagewrite;
+#endif
+} MPOOL;
+
+#define MPOOL_IGNOREPIN 0x01 /* Ignore if the page is pinned. */
+#define MPOOL_PAGE_REQUEST 0x01 /* Allocate a new page with a
+ specific page number. */
+#define MPOOL_PAGE_NEXT 0x02 /* Allocate a new page with the next
+ page number. */
+
+__BEGIN_DECLS
+MPOOL *mpool_open(void *, int, pgno_t, pgno_t);
+void mpool_filter(MPOOL *, void (*)(void *, pgno_t, void *),
+ void (*)(void *, pgno_t, void *), void *);
+void *mpool_new(MPOOL *, pgno_t *, unsigned int);
+void *mpool_get(MPOOL *, pgno_t, unsigned int);
+int mpool_delete(MPOOL *, void *);
+int mpool_put(MPOOL *, void *, unsigned int);
+int mpool_sync(MPOOL *);
+int mpool_close(MPOOL *);
+#ifdef STATISTICS
+void mpool_stat(MPOOL *);
+#endif
+__END_DECLS
+
+#endif
diff --git a/freebsd-userspace/lib/libc/db/btree/bt_close.c b/freebsd-userspace/lib/libc/db/btree/bt_close.c
new file mode 100644
index 0000000..b15d67c
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/btree/bt_close.c
@@ -0,0 +1,180 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_close.c 8.7 (Berkeley) 8/17/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include "namespace.h"
+#include <sys/param.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "un-namespace.h"
+
+#include <db.h>
+#include "btree.h"
+
+static int bt_meta(BTREE *);
+
+/*
+ * BT_CLOSE -- Close a btree.
+ *
+ * Parameters:
+ * dbp: pointer to access method
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS
+ */
+int
+__bt_close(DB *dbp)
+{
+ BTREE *t;
+ int fd;
+
+ t = dbp->internal;
+
+ /* Toss any page pinned across calls. */
+ if (t->bt_pinned != NULL) {
+ mpool_put(t->bt_mp, t->bt_pinned, 0);
+ t->bt_pinned = NULL;
+ }
+
+ /* Sync the tree. */
+ if (__bt_sync(dbp, 0) == RET_ERROR)
+ return (RET_ERROR);
+
+ /* Close the memory pool. */
+ if (mpool_close(t->bt_mp) == RET_ERROR)
+ return (RET_ERROR);
+
+ /* Free random memory. */
+ if (t->bt_cursor.key.data != NULL) {
+ free(t->bt_cursor.key.data);
+ t->bt_cursor.key.size = 0;
+ t->bt_cursor.key.data = NULL;
+ }
+ if (t->bt_rkey.data) {
+ free(t->bt_rkey.data);
+ t->bt_rkey.size = 0;
+ t->bt_rkey.data = NULL;
+ }
+ if (t->bt_rdata.data) {
+ free(t->bt_rdata.data);
+ t->bt_rdata.size = 0;
+ t->bt_rdata.data = NULL;
+ }
+
+ fd = t->bt_fd;
+ free(t);
+ free(dbp);
+ return (_close(fd) ? RET_ERROR : RET_SUCCESS);
+}
+
+/*
+ * BT_SYNC -- sync the btree to disk.
+ *
+ * Parameters:
+ * dbp: pointer to access method
+ *
+ * Returns:
+ * RET_SUCCESS, RET_ERROR.
+ */
+int
+__bt_sync(const DB *dbp, u_int flags)
+{
+ BTREE *t;
+ int status;
+
+ t = dbp->internal;
+
+ /* Toss any page pinned across calls. */
+ if (t->bt_pinned != NULL) {
+ mpool_put(t->bt_mp, t->bt_pinned, 0);
+ t->bt_pinned = NULL;
+ }
+
+ /* Sync doesn't currently take any flags. */
+ if (flags != 0) {
+ errno = EINVAL;
+ return (RET_ERROR);
+ }
+
+ if (F_ISSET(t, B_INMEM | B_RDONLY) || !F_ISSET(t, B_MODIFIED))
+ return (RET_SUCCESS);
+
+ if (F_ISSET(t, B_METADIRTY) && bt_meta(t) == RET_ERROR)
+ return (RET_ERROR);
+
+ if ((status = mpool_sync(t->bt_mp)) == RET_SUCCESS)
+ F_CLR(t, B_MODIFIED);
+
+ return (status);
+}
+
+/*
+ * BT_META -- write the tree meta data to disk.
+ *
+ * Parameters:
+ * t: tree
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS
+ */
+static int
+bt_meta(BTREE *t)
+{
+ BTMETA m;
+ void *p;
+
+ if ((p = mpool_get(t->bt_mp, P_META, 0)) == NULL)
+ return (RET_ERROR);
+
+ /* Fill in metadata. */
+ m.magic = BTREEMAGIC;
+ m.version = BTREEVERSION;
+ m.psize = t->bt_psize;
+ m.free = t->bt_free;
+ m.nrecs = t->bt_nrecs;
+ m.flags = F_ISSET(t, SAVEMETA);
+
+ memmove(p, &m, sizeof(BTMETA));
+ mpool_put(t->bt_mp, p, MPOOL_DIRTY);
+ return (RET_SUCCESS);
+}
diff --git a/freebsd-userspace/lib/libc/db/btree/bt_conv.c b/freebsd-userspace/lib/libc/db/btree/bt_conv.c
new file mode 100644
index 0000000..d84da44
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/btree/bt_conv.c
@@ -0,0 +1,214 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_conv.c 8.5 (Berkeley) 8/17/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+
+#include <stdio.h>
+
+#include <db.h>
+#include "btree.h"
+
+static void mswap(PAGE *);
+
+/*
+ * __BT_BPGIN, __BT_BPGOUT --
+ * Convert host-specific number layout to/from the host-independent
+ * format stored on disk.
+ *
+ * Parameters:
+ * t: tree
+ * pg: page number
+ * h: page to convert
+ */
+void
+__bt_pgin(void *t, pgno_t pg, void *pp)
+{
+ PAGE *h;
+ indx_t i, top;
+ u_char flags;
+ char *p;
+
+ if (!F_ISSET(((BTREE *)t), B_NEEDSWAP))
+ return;
+ if (pg == P_META) {
+ mswap(pp);
+ return;
+ }
+
+ h = pp;
+ M_32_SWAP(h->pgno);
+ M_32_SWAP(h->prevpg);
+ M_32_SWAP(h->nextpg);
+ M_32_SWAP(h->flags);
+ M_16_SWAP(h->lower);
+ M_16_SWAP(h->upper);
+
+ top = NEXTINDEX(h);
+ if ((h->flags & P_TYPE) == P_BINTERNAL)
+ for (i = 0; i < top; i++) {
+ M_16_SWAP(h->linp[i]);
+ p = (char *)GETBINTERNAL(h, i);
+ P_32_SWAP(p);
+ p += sizeof(u_int32_t);
+ P_32_SWAP(p);
+ p += sizeof(pgno_t);
+ if (*(u_char *)p & P_BIGKEY) {
+ p += sizeof(u_char);
+ P_32_SWAP(p);
+ p += sizeof(pgno_t);
+ P_32_SWAP(p);
+ }
+ }
+ else if ((h->flags & P_TYPE) == P_BLEAF)
+ for (i = 0; i < top; i++) {
+ M_16_SWAP(h->linp[i]);
+ p = (char *)GETBLEAF(h, i);
+ P_32_SWAP(p);
+ p += sizeof(u_int32_t);
+ P_32_SWAP(p);
+ p += sizeof(u_int32_t);
+ flags = *(u_char *)p;
+ if (flags & (P_BIGKEY | P_BIGDATA)) {
+ p += sizeof(u_char);
+ if (flags & P_BIGKEY) {
+ P_32_SWAP(p);
+ p += sizeof(pgno_t);
+ P_32_SWAP(p);
+ }
+ if (flags & P_BIGDATA) {
+ p += sizeof(u_int32_t);
+ P_32_SWAP(p);
+ p += sizeof(pgno_t);
+ P_32_SWAP(p);
+ }
+ }
+ }
+}
+
+void
+__bt_pgout(void *t, pgno_t pg, void *pp)
+{
+ PAGE *h;
+ indx_t i, top;
+ u_char flags;
+ char *p;
+
+ if (!F_ISSET(((BTREE *)t), B_NEEDSWAP))
+ return;
+ if (pg == P_META) {
+ mswap(pp);
+ return;
+ }
+
+ h = pp;
+ top = NEXTINDEX(h);
+ if ((h->flags & P_TYPE) == P_BINTERNAL)
+ for (i = 0; i < top; i++) {
+ p = (char *)GETBINTERNAL(h, i);
+ P_32_SWAP(p);
+ p += sizeof(u_int32_t);
+ P_32_SWAP(p);
+ p += sizeof(pgno_t);
+ if (*(u_char *)p & P_BIGKEY) {
+ p += sizeof(u_char);
+ P_32_SWAP(p);
+ p += sizeof(pgno_t);
+ P_32_SWAP(p);
+ }
+ M_16_SWAP(h->linp[i]);
+ }
+ else if ((h->flags & P_TYPE) == P_BLEAF)
+ for (i = 0; i < top; i++) {
+ p = (char *)GETBLEAF(h, i);
+ P_32_SWAP(p);
+ p += sizeof(u_int32_t);
+ P_32_SWAP(p);
+ p += sizeof(u_int32_t);
+ flags = *(u_char *)p;
+ if (flags & (P_BIGKEY | P_BIGDATA)) {
+ p += sizeof(u_char);
+ if (flags & P_BIGKEY) {
+ P_32_SWAP(p);
+ p += sizeof(pgno_t);
+ P_32_SWAP(p);
+ }
+ if (flags & P_BIGDATA) {
+ p += sizeof(u_int32_t);
+ P_32_SWAP(p);
+ p += sizeof(pgno_t);
+ P_32_SWAP(p);
+ }
+ }
+ M_16_SWAP(h->linp[i]);
+ }
+
+ M_32_SWAP(h->pgno);
+ M_32_SWAP(h->prevpg);
+ M_32_SWAP(h->nextpg);
+ M_32_SWAP(h->flags);
+ M_16_SWAP(h->lower);
+ M_16_SWAP(h->upper);
+}
+
+/*
+ * MSWAP -- Actually swap the bytes on the meta page.
+ *
+ * Parameters:
+ * p: page to convert
+ */
+static void
+mswap(PAGE *pg)
+{
+ char *p;
+
+ p = (char *)pg;
+ P_32_SWAP(p); /* magic */
+ p += sizeof(u_int32_t);
+ P_32_SWAP(p); /* version */
+ p += sizeof(u_int32_t);
+ P_32_SWAP(p); /* psize */
+ p += sizeof(u_int32_t);
+ P_32_SWAP(p); /* free */
+ p += sizeof(u_int32_t);
+ P_32_SWAP(p); /* nrecs */
+ p += sizeof(u_int32_t);
+ P_32_SWAP(p); /* flags */
+ p += sizeof(u_int32_t);
+}
diff --git a/freebsd-userspace/lib/libc/db/btree/bt_debug.c b/freebsd-userspace/lib/libc/db/btree/bt_debug.c
new file mode 100644
index 0000000..ce7849a
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/btree/bt_debug.c
@@ -0,0 +1,318 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_debug.c 8.5 (Berkeley) 8/17/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <db.h>
+#include "btree.h"
+
+#ifdef DEBUG
+/*
+ * BT_DUMP -- Dump the tree
+ *
+ * Parameters:
+ * dbp: pointer to the DB
+ */
+void
+__bt_dump(DB *dbp)
+{
+ BTREE *t;
+ PAGE *h;
+ pgno_t i;
+ char *sep;
+
+ t = dbp->internal;
+ (void)fprintf(stderr, "%s: pgsz %u",
+ F_ISSET(t, B_INMEM) ? "memory" : "disk", t->bt_psize);
+ if (F_ISSET(t, R_RECNO))
+ (void)fprintf(stderr, " keys %u", t->bt_nrecs);
+#undef X
+#define X(flag, name) \
+ if (F_ISSET(t, flag)) { \
+ (void)fprintf(stderr, "%s%s", sep, name); \
+ sep = ", "; \
+ }
+ if (t->flags != 0) {
+ sep = " flags (";
+ X(R_FIXLEN, "FIXLEN");
+ X(B_INMEM, "INMEM");
+ X(B_NODUPS, "NODUPS");
+ X(B_RDONLY, "RDONLY");
+ X(R_RECNO, "RECNO");
+ X(B_METADIRTY,"METADIRTY");
+ (void)fprintf(stderr, ")\n");
+ }
+#undef X
+
+ for (i = P_ROOT;
+ (h = mpool_get(t->bt_mp, i, MPOOL_IGNOREPIN)) != NULL; ++i)
+ __bt_dpage(h);
+}
+
+/*
+ * BT_DMPAGE -- Dump the meta page
+ *
+ * Parameters:
+ * h: pointer to the PAGE
+ */
+void
+__bt_dmpage(PAGE *h)
+{
+ BTMETA *m;
+ char *sep;
+
+ m = (BTMETA *)h;
+ (void)fprintf(stderr, "magic %x\n", m->magic);
+ (void)fprintf(stderr, "version %u\n", m->version);
+ (void)fprintf(stderr, "psize %u\n", m->psize);
+ (void)fprintf(stderr, "free %u\n", m->free);
+ (void)fprintf(stderr, "nrecs %u\n", m->nrecs);
+ (void)fprintf(stderr, "flags %u", m->flags);
+#undef X
+#define X(flag, name) \
+ if (m->flags & flag) { \
+ (void)fprintf(stderr, "%s%s", sep, name); \
+ sep = ", "; \
+ }
+ if (m->flags) {
+ sep = " (";
+ X(B_NODUPS, "NODUPS");
+ X(R_RECNO, "RECNO");
+ (void)fprintf(stderr, ")");
+ }
+}
+
+/*
+ * BT_DNPAGE -- Dump the page
+ *
+ * Parameters:
+ * n: page number to dump.
+ */
+void
+__bt_dnpage(DB *dbp, pgno_t pgno)
+{
+ BTREE *t;
+ PAGE *h;
+
+ t = dbp->internal;
+ if ((h = mpool_get(t->bt_mp, pgno, MPOOL_IGNOREPIN)) != NULL)
+ __bt_dpage(h);
+}
+
+/*
+ * BT_DPAGE -- Dump the page
+ *
+ * Parameters:
+ * h: pointer to the PAGE
+ */
+void
+__bt_dpage(PAGE *h)
+{
+ BINTERNAL *bi;
+ BLEAF *bl;
+ RINTERNAL *ri;
+ RLEAF *rl;
+ indx_t cur, top;
+ char *sep;
+
+ (void)fprintf(stderr, " page %u: (", h->pgno);
+#undef X
+#define X(flag, name) \
+ if (h->flags & flag) { \
+ (void)fprintf(stderr, "%s%s", sep, name); \
+ sep = ", "; \
+ }
+ sep = "";
+ X(P_BINTERNAL, "BINTERNAL") /* types */
+ X(P_BLEAF, "BLEAF")
+ X(P_RINTERNAL, "RINTERNAL") /* types */
+ X(P_RLEAF, "RLEAF")
+ X(P_OVERFLOW, "OVERFLOW")
+ X(P_PRESERVE, "PRESERVE");
+ (void)fprintf(stderr, ")\n");
+#undef X
+
+ (void)fprintf(stderr, "\tprev %2u next %2u", h->prevpg, h->nextpg);
+ if (h->flags & P_OVERFLOW)
+ return;
+
+ top = NEXTINDEX(h);
+ (void)fprintf(stderr, " lower %3d upper %3d nextind %d\n",
+ h->lower, h->upper, top);
+ for (cur = 0; cur < top; cur++) {
+ (void)fprintf(stderr, "\t[%03d] %4d ", cur, h->linp[cur]);
+ switch (h->flags & P_TYPE) {
+ case P_BINTERNAL:
+ bi = GETBINTERNAL(h, cur);
+ (void)fprintf(stderr,
+ "size %03d pgno %03d", bi->ksize, bi->pgno);
+ if (bi->flags & P_BIGKEY)
+ (void)fprintf(stderr, " (indirect)");
+ else if (bi->ksize)
+ (void)fprintf(stderr,
+ " {%.*s}", (int)bi->ksize, bi->bytes);
+ break;
+ case P_RINTERNAL:
+ ri = GETRINTERNAL(h, cur);
+ (void)fprintf(stderr, "entries %03d pgno %03d",
+ ri->nrecs, ri->pgno);
+ break;
+ case P_BLEAF:
+ bl = GETBLEAF(h, cur);
+ if (bl->flags & P_BIGKEY)
+ (void)fprintf(stderr,
+ "big key page %u size %u/",
+ *(pgno_t *)bl->bytes,
+ *(u_int32_t *)(bl->bytes + sizeof(pgno_t)));
+ else if (bl->ksize)
+ (void)fprintf(stderr, "%.*s/",
+ bl->ksize, bl->bytes);
+ if (bl->flags & P_BIGDATA)
+ (void)fprintf(stderr,
+ "big data page %u size %u",
+ *(pgno_t *)(bl->bytes + bl->ksize),
+ *(u_int32_t *)(bl->bytes + bl->ksize +
+ sizeof(pgno_t)));
+ else if (bl->dsize)
+ (void)fprintf(stderr, "%.*s",
+ (int)bl->dsize, bl->bytes + bl->ksize);
+ break;
+ case P_RLEAF:
+ rl = GETRLEAF(h, cur);
+ if (rl->flags & P_BIGDATA)
+ (void)fprintf(stderr,
+ "big data page %u size %u",
+ *(pgno_t *)rl->bytes,
+ *(u_int32_t *)(rl->bytes + sizeof(pgno_t)));
+ else if (rl->dsize)
+ (void)fprintf(stderr,
+ "%.*s", (int)rl->dsize, rl->bytes);
+ break;
+ }
+ (void)fprintf(stderr, "\n");
+ }
+}
+#endif
+
+#ifdef STATISTICS
+/*
+ * BT_STAT -- Gather/print the tree statistics
+ *
+ * Parameters:
+ * dbp: pointer to the DB
+ */
+void
+__bt_stat(DB *dbp)
+{
+ extern u_long bt_cache_hit, bt_cache_miss, bt_pfxsaved, bt_rootsplit;
+ extern u_long bt_sortsplit, bt_split;
+ BTREE *t;
+ PAGE *h;
+ pgno_t i, pcont, pinternal, pleaf;
+ u_long ifree, lfree, nkeys;
+ int levels;
+
+ t = dbp->internal;
+ pcont = pinternal = pleaf = 0;
+ nkeys = ifree = lfree = 0;
+ for (i = P_ROOT;
+ (h = mpool_get(t->bt_mp, i, MPOOL_IGNOREPIN)) != NULL; ++i)
+ switch (h->flags & P_TYPE) {
+ case P_BINTERNAL:
+ case P_RINTERNAL:
+ ++pinternal;
+ ifree += h->upper - h->lower;
+ break;
+ case P_BLEAF:
+ case P_RLEAF:
+ ++pleaf;
+ lfree += h->upper - h->lower;
+ nkeys += NEXTINDEX(h);
+ break;
+ case P_OVERFLOW:
+ ++pcont;
+ break;
+ }
+
+ /* Count the levels of the tree. */
+ for (i = P_ROOT, levels = 0 ;; ++levels) {
+ h = mpool_get(t->bt_mp, i, MPOOL_IGNOREPIN);
+ if (h->flags & (P_BLEAF|P_RLEAF)) {
+ if (levels == 0)
+ levels = 1;
+ break;
+ }
+ i = F_ISSET(t, R_RECNO) ?
+ GETRINTERNAL(h, 0)->pgno :
+ GETBINTERNAL(h, 0)->pgno;
+ }
+
+ (void)fprintf(stderr, "%d level%s with %lu keys",
+ levels, levels == 1 ? "" : "s", nkeys);
+ if (F_ISSET(t, R_RECNO))
+ (void)fprintf(stderr, " (%u header count)", t->bt_nrecs);
+ (void)fprintf(stderr,
+ "\n%u pages (leaf %u, internal %u, overflow %u)\n",
+ pinternal + pleaf + pcont, pleaf, pinternal, pcont);
+ (void)fprintf(stderr, "%lu cache hits, %lu cache misses\n",
+ bt_cache_hit, bt_cache_miss);
+ (void)fprintf(stderr, "%lu splits (%lu root splits, %lu sort splits)\n",
+ bt_split, bt_rootsplit, bt_sortsplit);
+ pleaf *= t->bt_psize - BTDATAOFF;
+ if (pleaf)
+ (void)fprintf(stderr,
+ "%.0f%% leaf fill (%lu bytes used, %lu bytes free)\n",
+ ((double)(pleaf - lfree) / pleaf) * 100,
+ pleaf - lfree, lfree);
+ pinternal *= t->bt_psize - BTDATAOFF;
+ if (pinternal)
+ (void)fprintf(stderr,
+ "%.0f%% internal fill (%lu bytes used, %lu bytes free\n",
+ ((double)(pinternal - ifree) / pinternal) * 100,
+ pinternal - ifree, ifree);
+ if (bt_pfxsaved)
+ (void)fprintf(stderr, "prefix checking removed %lu bytes.\n",
+ bt_pfxsaved);
+}
+#endif
diff --git a/freebsd-userspace/lib/libc/db/btree/bt_delete.c b/freebsd-userspace/lib/libc/db/btree/bt_delete.c
new file mode 100644
index 0000000..ac29501
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/btree/bt_delete.c
@@ -0,0 +1,637 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_delete.c 8.13 (Berkeley) 7/28/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <db.h>
+#include "btree.h"
+
+static int __bt_bdelete(BTREE *, const DBT *);
+static int __bt_curdel(BTREE *, const DBT *, PAGE *, u_int);
+static int __bt_pdelete(BTREE *, PAGE *);
+static int __bt_relink(BTREE *, PAGE *);
+static int __bt_stkacq(BTREE *, PAGE **, CURSOR *);
+
+/*
+ * __bt_delete
+ * Delete the item(s) referenced by a key.
+ *
+ * Return RET_SPECIAL if the key is not found.
+ */
+int
+__bt_delete(const DB *dbp, const DBT *key, u_int flags)
+{
+ BTREE *t;
+ CURSOR *c;
+ PAGE *h;
+ int status;
+
+ t = dbp->internal;
+
+ /* Toss any page pinned across calls. */
+ if (t->bt_pinned != NULL) {
+ mpool_put(t->bt_mp, t->bt_pinned, 0);
+ t->bt_pinned = NULL;
+ }
+
+ /* Check for change to a read-only tree. */
+ if (F_ISSET(t, B_RDONLY)) {
+ errno = EPERM;
+ return (RET_ERROR);
+ }
+
+ switch (flags) {
+ case 0:
+ status = __bt_bdelete(t, key);
+ break;
+ case R_CURSOR:
+ /*
+ * If flags is R_CURSOR, delete the cursor. Must already
+ * have started a scan and not have already deleted it.
+ */
+ c = &t->bt_cursor;
+ if (F_ISSET(c, CURS_INIT)) {
+ if (F_ISSET(c, CURS_ACQUIRE | CURS_AFTER | CURS_BEFORE))
+ return (RET_SPECIAL);
+ if ((h = mpool_get(t->bt_mp, c->pg.pgno, 0)) == NULL)
+ return (RET_ERROR);
+
+ /*
+ * If the page is about to be emptied, we'll need to
+ * delete it, which means we have to acquire a stack.
+ */
+ if (NEXTINDEX(h) == 1)
+ if (__bt_stkacq(t, &h, &t->bt_cursor))
+ return (RET_ERROR);
+
+ status = __bt_dleaf(t, NULL, h, c->pg.index);
+
+ if (NEXTINDEX(h) == 0 && status == RET_SUCCESS) {
+ if (__bt_pdelete(t, h))
+ return (RET_ERROR);
+ } else
+ mpool_put(t->bt_mp,
+ h, status == RET_SUCCESS ? MPOOL_DIRTY : 0);
+ break;
+ }
+ /* FALLTHROUGH */
+ default:
+ errno = EINVAL;
+ return (RET_ERROR);
+ }
+ if (status == RET_SUCCESS)
+ F_SET(t, B_MODIFIED);
+ return (status);
+}
+
+/*
+ * __bt_stkacq --
+ * Acquire a stack so we can delete a cursor entry.
+ *
+ * Parameters:
+ * t: tree
+ * hp: pointer to current, pinned PAGE pointer
+ * c: pointer to the cursor
+ *
+ * Returns:
+ * 0 on success, 1 on failure
+ */
+static int
+__bt_stkacq(BTREE *t, PAGE **hp, CURSOR *c)
+{
+ BINTERNAL *bi;
+ EPG *e;
+ EPGNO *parent;
+ PAGE *h;
+ indx_t idx;
+ pgno_t pgno;
+ recno_t nextpg, prevpg;
+ int exact, level;
+
+ /*
+ * Find the first occurrence of the key in the tree. Toss the
+ * currently locked page so we don't hit an already-locked page.
+ */
+ h = *hp;
+ mpool_put(t->bt_mp, h, 0);
+ if ((e = __bt_search(t, &c->key, &exact)) == NULL)
+ return (1);
+ h = e->page;
+
+ /* See if we got it in one shot. */
+ if (h->pgno == c->pg.pgno)
+ goto ret;
+
+ /*
+ * Move right, looking for the page. At each move we have to move
+ * up the stack until we don't have to move to the next page. If
+ * we have to change pages at an internal level, we have to fix the
+ * stack back up.
+ */
+ while (h->pgno != c->pg.pgno) {
+ if ((nextpg = h->nextpg) == P_INVALID)
+ break;
+ mpool_put(t->bt_mp, h, 0);
+
+ /* Move up the stack. */
+ for (level = 0; (parent = BT_POP(t)) != NULL; ++level) {
+ /* Get the parent page. */
+ if ((h = mpool_get(t->bt_mp, parent->pgno, 0)) == NULL)
+ return (1);
+
+ /* Move to the next index. */
+ if (parent->index != NEXTINDEX(h) - 1) {
+ idx = parent->index + 1;
+ BT_PUSH(t, h->pgno, idx);
+ break;
+ }
+ mpool_put(t->bt_mp, h, 0);
+ }
+
+ /* Restore the stack. */
+ while (level--) {
+ /* Push the next level down onto the stack. */
+ bi = GETBINTERNAL(h, idx);
+ pgno = bi->pgno;
+ BT_PUSH(t, pgno, 0);
+
+ /* Lose the currently pinned page. */
+ mpool_put(t->bt_mp, h, 0);
+
+ /* Get the next level down. */
+ if ((h = mpool_get(t->bt_mp, pgno, 0)) == NULL)
+ return (1);
+ idx = 0;
+ }
+ mpool_put(t->bt_mp, h, 0);
+ if ((h = mpool_get(t->bt_mp, nextpg, 0)) == NULL)
+ return (1);
+ }
+
+ if (h->pgno == c->pg.pgno)
+ goto ret;
+
+ /* Reacquire the original stack. */
+ mpool_put(t->bt_mp, h, 0);
+ if ((e = __bt_search(t, &c->key, &exact)) == NULL)
+ return (1);
+ h = e->page;
+
+ /*
+ * Move left, looking for the page. At each move we have to move
+ * up the stack until we don't have to change pages to move to the
+ * next page. If we have to change pages at an internal level, we
+ * have to fix the stack back up.
+ */
+ while (h->pgno != c->pg.pgno) {
+ if ((prevpg = h->prevpg) == P_INVALID)
+ break;
+ mpool_put(t->bt_mp, h, 0);
+
+ /* Move up the stack. */
+ for (level = 0; (parent = BT_POP(t)) != NULL; ++level) {
+ /* Get the parent page. */
+ if ((h = mpool_get(t->bt_mp, parent->pgno, 0)) == NULL)
+ return (1);
+
+ /* Move to the next index. */
+ if (parent->index != 0) {
+ idx = parent->index - 1;
+ BT_PUSH(t, h->pgno, idx);
+ break;
+ }
+ mpool_put(t->bt_mp, h, 0);
+ }
+
+ /* Restore the stack. */
+ while (level--) {
+ /* Push the next level down onto the stack. */
+ bi = GETBINTERNAL(h, idx);
+ pgno = bi->pgno;
+
+ /* Lose the currently pinned page. */
+ mpool_put(t->bt_mp, h, 0);
+
+ /* Get the next level down. */
+ if ((h = mpool_get(t->bt_mp, pgno, 0)) == NULL)
+ return (1);
+
+ idx = NEXTINDEX(h) - 1;
+ BT_PUSH(t, pgno, idx);
+ }
+ mpool_put(t->bt_mp, h, 0);
+ if ((h = mpool_get(t->bt_mp, prevpg, 0)) == NULL)
+ return (1);
+ }
+
+
+ret: mpool_put(t->bt_mp, h, 0);
+ return ((*hp = mpool_get(t->bt_mp, c->pg.pgno, 0)) == NULL);
+}
+
+/*
+ * __bt_bdelete --
+ * Delete all key/data pairs matching the specified key.
+ *
+ * Parameters:
+ * t: tree
+ * key: key to delete
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key not found.
+ */
+static int
+__bt_bdelete(BTREE *t, const DBT *key)
+{
+ EPG *e;
+ PAGE *h;
+ int deleted, exact, redo;
+
+ deleted = 0;
+
+ /* Find any matching record; __bt_search pins the page. */
+loop: if ((e = __bt_search(t, key, &exact)) == NULL)
+ return (deleted ? RET_SUCCESS : RET_ERROR);
+ if (!exact) {
+ mpool_put(t->bt_mp, e->page, 0);
+ return (deleted ? RET_SUCCESS : RET_SPECIAL);
+ }
+
+ /*
+ * Delete forward, then delete backward, from the found key. If
+ * there are duplicates and we reach either side of the page, do
+ * the key search again, so that we get them all.
+ */
+ redo = 0;
+ h = e->page;
+ do {
+ if (__bt_dleaf(t, key, h, e->index)) {
+ mpool_put(t->bt_mp, h, 0);
+ return (RET_ERROR);
+ }
+ if (F_ISSET(t, B_NODUPS)) {
+ if (NEXTINDEX(h) == 0) {
+ if (__bt_pdelete(t, h))
+ return (RET_ERROR);
+ } else
+ mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+ return (RET_SUCCESS);
+ }
+ deleted = 1;
+ } while (e->index < NEXTINDEX(h) && __bt_cmp(t, key, e) == 0);
+
+ /* Check for right-hand edge of the page. */
+ if (e->index == NEXTINDEX(h))
+ redo = 1;
+
+ /* Delete from the key to the beginning of the page. */
+ while (e->index-- > 0) {
+ if (__bt_cmp(t, key, e) != 0)
+ break;
+ if (__bt_dleaf(t, key, h, e->index) == RET_ERROR) {
+ mpool_put(t->bt_mp, h, 0);
+ return (RET_ERROR);
+ }
+ if (e->index == 0)
+ redo = 1;
+ }
+
+ /* Check for an empty page. */
+ if (NEXTINDEX(h) == 0) {
+ if (__bt_pdelete(t, h))
+ return (RET_ERROR);
+ goto loop;
+ }
+
+ /* Put the page. */
+ mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+
+ if (redo)
+ goto loop;
+ return (RET_SUCCESS);
+}
+
+/*
+ * __bt_pdelete --
+ * Delete a single page from the tree.
+ *
+ * Parameters:
+ * t: tree
+ * h: leaf page
+ *
+ * Returns:
+ * RET_SUCCESS, RET_ERROR.
+ *
+ * Side-effects:
+ * mpool_put's the page
+ */
+static int
+__bt_pdelete(BTREE *t, PAGE *h)
+{
+ BINTERNAL *bi;
+ PAGE *pg;
+ EPGNO *parent;
+ indx_t cnt, idx, *ip, offset;
+ u_int32_t nksize;
+ char *from;
+
+ /*
+ * Walk the parent page stack -- a LIFO stack of the pages that were
+ * traversed when we searched for the page where the delete occurred.
+ * Each stack entry is a page number and a page index offset. The
+ * offset is for the page traversed on the search. We've just deleted
+ * a page, so we have to delete the key from the parent page.
+ *
+ * If the delete from the parent page makes it empty, this process may
+ * continue all the way up the tree. We stop if we reach the root page
+ * (which is never deleted, it's just not worth the effort) or if the
+ * delete does not empty the page.
+ */
+ while ((parent = BT_POP(t)) != NULL) {
+ /* Get the parent page. */
+ if ((pg = mpool_get(t->bt_mp, parent->pgno, 0)) == NULL)
+ return (RET_ERROR);
+
+ idx = parent->index;
+ bi = GETBINTERNAL(pg, idx);
+
+ /* Free any overflow pages. */
+ if (bi->flags & P_BIGKEY &&
+ __ovfl_delete(t, bi->bytes) == RET_ERROR) {
+ mpool_put(t->bt_mp, pg, 0);
+ return (RET_ERROR);
+ }
+
+ /*
+ * Free the parent if it has only the one key and it's not the
+ * root page. If it's the rootpage, turn it back into an empty
+ * leaf page.
+ */
+ if (NEXTINDEX(pg) == 1) {
+ if (pg->pgno == P_ROOT) {
+ pg->lower = BTDATAOFF;
+ pg->upper = t->bt_psize;
+ pg->flags = P_BLEAF;
+ } else {
+ if (__bt_relink(t, pg) || __bt_free(t, pg))
+ return (RET_ERROR);
+ continue;
+ }
+ } else {
+ /* Pack remaining key items at the end of the page. */
+ nksize = NBINTERNAL(bi->ksize);
+ from = (char *)pg + pg->upper;
+ memmove(from + nksize, from, (char *)bi - from);
+ pg->upper += nksize;
+
+ /* Adjust indices' offsets, shift the indices down. */
+ offset = pg->linp[idx];
+ for (cnt = idx, ip = &pg->linp[0]; cnt--; ++ip)
+ if (ip[0] < offset)
+ ip[0] += nksize;
+ for (cnt = NEXTINDEX(pg) - idx; --cnt; ++ip)
+ ip[0] = ip[1] < offset ? ip[1] + nksize : ip[1];
+ pg->lower -= sizeof(indx_t);
+ }
+
+ mpool_put(t->bt_mp, pg, MPOOL_DIRTY);
+ break;
+ }
+
+ /* Free the leaf page, as long as it wasn't the root. */
+ if (h->pgno == P_ROOT) {
+ mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+ return (RET_SUCCESS);
+ }
+ return (__bt_relink(t, h) || __bt_free(t, h));
+}
+
+/*
+ * __bt_dleaf --
+ * Delete a single record from a leaf page.
+ *
+ * Parameters:
+ * t: tree
+ * key: referenced key
+ * h: page
+ * idx: index on page to delete
+ *
+ * Returns:
+ * RET_SUCCESS, RET_ERROR.
+ */
+int
+__bt_dleaf(BTREE *t, const DBT *key, PAGE *h, u_int idx)
+{
+ BLEAF *bl;
+ indx_t cnt, *ip, offset;
+ u_int32_t nbytes;
+ void *to;
+ char *from;
+
+ /* If this record is referenced by the cursor, delete the cursor. */
+ if (F_ISSET(&t->bt_cursor, CURS_INIT) &&
+ !F_ISSET(&t->bt_cursor, CURS_ACQUIRE) &&
+ t->bt_cursor.pg.pgno == h->pgno && t->bt_cursor.pg.index == idx &&
+ __bt_curdel(t, key, h, idx))
+ return (RET_ERROR);
+
+ /* If the entry uses overflow pages, make them available for reuse. */
+ to = bl = GETBLEAF(h, idx);
+ if (bl->flags & P_BIGKEY && __ovfl_delete(t, bl->bytes) == RET_ERROR)
+ return (RET_ERROR);
+ if (bl->flags & P_BIGDATA &&
+ __ovfl_delete(t, bl->bytes + bl->ksize) == RET_ERROR)
+ return (RET_ERROR);
+
+ /* Pack the remaining key/data items at the end of the page. */
+ nbytes = NBLEAF(bl);
+ from = (char *)h + h->upper;
+ memmove(from + nbytes, from, (char *)to - from);
+ h->upper += nbytes;
+
+ /* Adjust the indices' offsets, shift the indices down. */
+ offset = h->linp[idx];
+ for (cnt = idx, ip = &h->linp[0]; cnt--; ++ip)
+ if (ip[0] < offset)
+ ip[0] += nbytes;
+ for (cnt = NEXTINDEX(h) - idx; --cnt; ++ip)
+ ip[0] = ip[1] < offset ? ip[1] + nbytes : ip[1];
+ h->lower -= sizeof(indx_t);
+
+ /* If the cursor is on this page, adjust it as necessary. */
+ if (F_ISSET(&t->bt_cursor, CURS_INIT) &&
+ !F_ISSET(&t->bt_cursor, CURS_ACQUIRE) &&
+ t->bt_cursor.pg.pgno == h->pgno && t->bt_cursor.pg.index > idx)
+ --t->bt_cursor.pg.index;
+
+ return (RET_SUCCESS);
+}
+
+/*
+ * __bt_curdel --
+ * Delete the cursor.
+ *
+ * Parameters:
+ * t: tree
+ * key: referenced key (or NULL)
+ * h: page
+ * idx: index on page to delete
+ *
+ * Returns:
+ * RET_SUCCESS, RET_ERROR.
+ */
+static int
+__bt_curdel(BTREE *t, const DBT *key, PAGE *h, u_int idx)
+{
+ CURSOR *c;
+ EPG e;
+ PAGE *pg;
+ int curcopy, status;
+
+ /*
+ * If there are duplicates, move forward or backward to one.
+ * Otherwise, copy the key into the cursor area.
+ */
+ c = &t->bt_cursor;
+ F_CLR(c, CURS_AFTER | CURS_BEFORE | CURS_ACQUIRE);
+
+ curcopy = 0;
+ if (!F_ISSET(t, B_NODUPS)) {
+ /*
+ * We're going to have to do comparisons. If we weren't
+ * provided a copy of the key, i.e. the user is deleting
+ * the current cursor position, get one.
+ */
+ if (key == NULL) {
+ e.page = h;
+ e.index = idx;
+ if ((status = __bt_ret(t, &e,
+ &c->key, &c->key, NULL, NULL, 1)) != RET_SUCCESS)
+ return (status);
+ curcopy = 1;
+ key = &c->key;
+ }
+ /* Check previous key, if not at the beginning of the page. */
+ if (idx > 0) {
+ e.page = h;
+ e.index = idx - 1;
+ if (__bt_cmp(t, key, &e) == 0) {
+ F_SET(c, CURS_BEFORE);
+ goto dup2;
+ }
+ }
+ /* Check next key, if not at the end of the page. */
+ if (idx < NEXTINDEX(h) - 1) {
+ e.page = h;
+ e.index = idx + 1;
+ if (__bt_cmp(t, key, &e) == 0) {
+ F_SET(c, CURS_AFTER);
+ goto dup2;
+ }
+ }
+ /* Check previous key if at the beginning of the page. */
+ if (idx == 0 && h->prevpg != P_INVALID) {
+ if ((pg = mpool_get(t->bt_mp, h->prevpg, 0)) == NULL)
+ return (RET_ERROR);
+ e.page = pg;
+ e.index = NEXTINDEX(pg) - 1;
+ if (__bt_cmp(t, key, &e) == 0) {
+ F_SET(c, CURS_BEFORE);
+ goto dup1;
+ }
+ mpool_put(t->bt_mp, pg, 0);
+ }
+ /* Check next key if at the end of the page. */
+ if (idx == NEXTINDEX(h) - 1 && h->nextpg != P_INVALID) {
+ if ((pg = mpool_get(t->bt_mp, h->nextpg, 0)) == NULL)
+ return (RET_ERROR);
+ e.page = pg;
+ e.index = 0;
+ if (__bt_cmp(t, key, &e) == 0) {
+ F_SET(c, CURS_AFTER);
+dup1: mpool_put(t->bt_mp, pg, 0);
+dup2: c->pg.pgno = e.page->pgno;
+ c->pg.index = e.index;
+ return (RET_SUCCESS);
+ }
+ mpool_put(t->bt_mp, pg, 0);
+ }
+ }
+ e.page = h;
+ e.index = idx;
+ if (curcopy || (status =
+ __bt_ret(t, &e, &c->key, &c->key, NULL, NULL, 1)) == RET_SUCCESS) {
+ F_SET(c, CURS_ACQUIRE);
+ return (RET_SUCCESS);
+ }
+ return (status);
+}
+
+/*
+ * __bt_relink --
+ * Link around a deleted page.
+ *
+ * Parameters:
+ * t: tree
+ * h: page to be deleted
+ */
+static int
+__bt_relink(BTREE *t, PAGE *h)
+{
+ PAGE *pg;
+
+ if (h->nextpg != P_INVALID) {
+ if ((pg = mpool_get(t->bt_mp, h->nextpg, 0)) == NULL)
+ return (RET_ERROR);
+ pg->prevpg = h->prevpg;
+ mpool_put(t->bt_mp, pg, MPOOL_DIRTY);
+ }
+ if (h->prevpg != P_INVALID) {
+ if ((pg = mpool_get(t->bt_mp, h->prevpg, 0)) == NULL)
+ return (RET_ERROR);
+ pg->nextpg = h->nextpg;
+ mpool_put(t->bt_mp, pg, MPOOL_DIRTY);
+ }
+ return (0);
+}
diff --git a/freebsd-userspace/lib/libc/db/btree/bt_get.c b/freebsd-userspace/lib/libc/db/btree/bt_get.c
new file mode 100644
index 0000000..b335e1b
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/btree/bt_get.c
@@ -0,0 +1,101 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_get.c 8.6 (Berkeley) 7/20/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#include <db.h>
+#include "btree.h"
+
+/*
+ * __BT_GET -- Get a record from the btree.
+ *
+ * Parameters:
+ * dbp: pointer to access method
+ * key: key to find
+ * data: data to return
+ * flag: currently unused
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key not found.
+ */
+int
+__bt_get(const DB *dbp, const DBT *key, DBT *data, u_int flags)
+{
+ BTREE *t;
+ EPG *e;
+ int exact, status;
+
+ t = dbp->internal;
+
+ /* Toss any page pinned across calls. */
+ if (t->bt_pinned != NULL) {
+ mpool_put(t->bt_mp, t->bt_pinned, 0);
+ t->bt_pinned = NULL;
+ }
+
+ /* Get currently doesn't take any flags. */
+ if (flags) {
+ errno = EINVAL;
+ return (RET_ERROR);
+ }
+
+ if ((e = __bt_search(t, key, &exact)) == NULL)
+ return (RET_ERROR);
+ if (!exact) {
+ mpool_put(t->bt_mp, e->page, 0);
+ return (RET_SPECIAL);
+ }
+
+ status = __bt_ret(t, e, NULL, NULL, data, &t->bt_rdata, 0);
+
+ /*
+ * If the user is doing concurrent access, we copied the
+ * key/data, toss the page.
+ */
+ if (F_ISSET(t, B_DB_LOCK))
+ mpool_put(t->bt_mp, e->page, 0);
+ else
+ t->bt_pinned = e->page;
+ return (status);
+}
diff --git a/freebsd-userspace/lib/libc/db/btree/bt_open.c b/freebsd-userspace/lib/libc/db/btree/bt_open.c
new file mode 100644
index 0000000..1e37c0e
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/btree/bt_open.c
@@ -0,0 +1,453 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_open.c 8.10 (Berkeley) 8/17/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * Implementation of btree access method for 4.4BSD.
+ *
+ * The design here was originally based on that of the btree access method
+ * used in the Postgres database system at UC Berkeley. This implementation
+ * is wholly independent of the Postgres code.
+ */
+
+#include "namespace.h"
+#include <sys/param.h>
+#include <sys/stat.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "un-namespace.h"
+
+#include <db.h>
+#include "btree.h"
+
+#ifdef DEBUG
+#undef MINPSIZE
+#define MINPSIZE 128
+#endif
+
+static int byteorder(void);
+static int nroot(BTREE *);
+static int tmp(void);
+
+/*
+ * __BT_OPEN -- Open a btree.
+ *
+ * Creates and fills a DB struct, and calls the routine that actually
+ * opens the btree.
+ *
+ * Parameters:
+ * fname: filename (NULL for in-memory trees)
+ * flags: open flag bits
+ * mode: open permission bits
+ * b: BTREEINFO pointer
+ *
+ * Returns:
+ * NULL on failure, pointer to DB on success.
+ *
+ */
+DB *
+__bt_open(const char *fname, int flags, int mode, const BTREEINFO *openinfo, int dflags)
+{
+ struct stat sb;
+ BTMETA m;
+ BTREE *t;
+ BTREEINFO b;
+ DB *dbp;
+ pgno_t ncache;
+ ssize_t nr;
+ int machine_lorder, saved_errno;
+
+ t = NULL;
+
+ /*
+ * Intention is to make sure all of the user's selections are okay
+ * here and then use them without checking. Can't be complete, since
+ * we don't know the right page size, lorder or flags until the backing
+ * file is opened. Also, the file's page size can cause the cachesize
+ * to change.
+ */
+ machine_lorder = byteorder();
+ if (openinfo) {
+ b = *openinfo;
+
+ /* Flags: R_DUP. */
+ if (b.flags & ~(R_DUP))
+ goto einval;
+
+ /*
+ * Page size must be indx_t aligned and >= MINPSIZE. Default
+ * page size is set farther on, based on the underlying file
+ * transfer size.
+ */
+ if (b.psize &&
+ (b.psize < MINPSIZE || b.psize > MAX_PAGE_OFFSET + 1 ||
+ b.psize & (sizeof(indx_t) - 1) ))
+ goto einval;
+
+ /* Minimum number of keys per page; absolute minimum is 2. */
+ if (b.minkeypage) {
+ if (b.minkeypage < 2)
+ goto einval;
+ } else
+ b.minkeypage = DEFMINKEYPAGE;
+
+ /* If no comparison, use default comparison and prefix. */
+ if (b.compare == NULL) {
+ b.compare = __bt_defcmp;
+ if (b.prefix == NULL)
+ b.prefix = __bt_defpfx;
+ }
+
+ if (b.lorder == 0)
+ b.lorder = machine_lorder;
+ } else {
+ b.compare = __bt_defcmp;
+ b.cachesize = 0;
+ b.flags = 0;
+ b.lorder = machine_lorder;
+ b.minkeypage = DEFMINKEYPAGE;
+ b.prefix = __bt_defpfx;
+ b.psize = 0;
+ }
+
+ /* Check for the ubiquitous PDP-11. */
+ if (b.lorder != BIG_ENDIAN && b.lorder != LITTLE_ENDIAN)
+ goto einval;
+
+ /* Allocate and initialize DB and BTREE structures. */
+ if ((t = (BTREE *)calloc(1, sizeof(BTREE))) == NULL)
+ goto err;
+ t->bt_fd = -1; /* Don't close unopened fd on error. */
+ t->bt_lorder = b.lorder;
+ t->bt_order = NOT;
+ t->bt_cmp = b.compare;
+ t->bt_pfx = b.prefix;
+ t->bt_rfd = -1;
+
+ if ((t->bt_dbp = dbp = (DB *)calloc(1, sizeof(DB))) == NULL)
+ goto err;
+ if (t->bt_lorder != machine_lorder)
+ F_SET(t, B_NEEDSWAP);
+
+ dbp->type = DB_BTREE;
+ dbp->internal = t;
+ dbp->close = __bt_close;
+ dbp->del = __bt_delete;
+ dbp->fd = __bt_fd;
+ dbp->get = __bt_get;
+ dbp->put = __bt_put;
+ dbp->seq = __bt_seq;
+ dbp->sync = __bt_sync;
+
+ /*
+ * If no file name was supplied, this is an in-memory btree and we
+ * open a backing temporary file. Otherwise, it's a disk-based tree.
+ */
+ if (fname) {
+ switch (flags & O_ACCMODE) {
+ case O_RDONLY:
+ F_SET(t, B_RDONLY);
+ break;
+ case O_RDWR:
+ break;
+ case O_WRONLY:
+ default:
+ goto einval;
+ }
+
+ if ((t->bt_fd = _open(fname, flags, mode)) < 0)
+ goto err;
+
+ } else {
+ if ((flags & O_ACCMODE) != O_RDWR)
+ goto einval;
+ if ((t->bt_fd = tmp()) == -1)
+ goto err;
+ F_SET(t, B_INMEM);
+ }
+
+ if (_fcntl(t->bt_fd, F_SETFD, 1) == -1)
+ goto err;
+
+ if (_fstat(t->bt_fd, &sb))
+ goto err;
+ if (sb.st_size) {
+ if ((nr = _read(t->bt_fd, &m, sizeof(BTMETA))) < 0)
+ goto err;
+ if (nr != sizeof(BTMETA))
+ goto eftype;
+
+ /*
+ * Read in the meta-data. This can change the notion of what
+ * the lorder, page size and flags are, and, when the page size
+ * changes, the cachesize value can change too. If the user
+ * specified the wrong byte order for an existing database, we
+ * don't bother to return an error, we just clear the NEEDSWAP
+ * bit.
+ */
+ if (m.magic == BTREEMAGIC)
+ F_CLR(t, B_NEEDSWAP);
+ else {
+ F_SET(t, B_NEEDSWAP);
+ M_32_SWAP(m.magic);
+ M_32_SWAP(m.version);
+ M_32_SWAP(m.psize);
+ M_32_SWAP(m.free);
+ M_32_SWAP(m.nrecs);
+ M_32_SWAP(m.flags);
+ }
+ if (m.magic != BTREEMAGIC || m.version != BTREEVERSION)
+ goto eftype;
+ if (m.psize < MINPSIZE || m.psize > MAX_PAGE_OFFSET + 1 ||
+ m.psize & (sizeof(indx_t) - 1) )
+ goto eftype;
+ if (m.flags & ~SAVEMETA)
+ goto eftype;
+ b.psize = m.psize;
+ F_SET(t, m.flags);
+ t->bt_free = m.free;
+ t->bt_nrecs = m.nrecs;
+ } else {
+ /*
+ * Set the page size to the best value for I/O to this file.
+ * Don't overflow the page offset type.
+ */
+ if (b.psize == 0) {
+ b.psize = sb.st_blksize;
+ if (b.psize < MINPSIZE)
+ b.psize = MINPSIZE;
+ if (b.psize > MAX_PAGE_OFFSET + 1)
+ b.psize = MAX_PAGE_OFFSET + 1;
+ }
+
+ /* Set flag if duplicates permitted. */
+ if (!(b.flags & R_DUP))
+ F_SET(t, B_NODUPS);
+
+ t->bt_free = P_INVALID;
+ t->bt_nrecs = 0;
+ F_SET(t, B_METADIRTY);
+ }
+
+ t->bt_psize = b.psize;
+
+ /* Set the cache size; must be a multiple of the page size. */
+ if (b.cachesize && b.cachesize & (b.psize - 1) )
+ b.cachesize += (~b.cachesize & (b.psize - 1) ) + 1;
+ if (b.cachesize < b.psize * MINCACHE)
+ b.cachesize = b.psize * MINCACHE;
+
+ /* Calculate number of pages to cache. */
+ ncache = (b.cachesize + t->bt_psize - 1) / t->bt_psize;
+
+ /*
+ * The btree data structure requires that at least two keys can fit on
+ * a page, but other than that there's no fixed requirement. The user
+ * specified a minimum number per page, and we translated that into the
+ * number of bytes a key/data pair can use before being placed on an
+ * overflow page. This calculation includes the page header, the size
+ * of the index referencing the leaf item and the size of the leaf item
+ * structure. Also, don't let the user specify a minkeypage such that
+ * a key/data pair won't fit even if both key and data are on overflow
+ * pages.
+ */
+ t->bt_ovflsize = (t->bt_psize - BTDATAOFF) / b.minkeypage -
+ (sizeof(indx_t) + NBLEAFDBT(0, 0));
+ if (t->bt_ovflsize < NBLEAFDBT(NOVFLSIZE, NOVFLSIZE) + sizeof(indx_t))
+ t->bt_ovflsize =
+ NBLEAFDBT(NOVFLSIZE, NOVFLSIZE) + sizeof(indx_t);
+
+ /* Initialize the buffer pool. */
+ if ((t->bt_mp =
+ mpool_open(NULL, t->bt_fd, t->bt_psize, ncache)) == NULL)
+ goto err;
+ if (!F_ISSET(t, B_INMEM))
+ mpool_filter(t->bt_mp, __bt_pgin, __bt_pgout, t);
+
+ /* Create a root page if new tree. */
+ if (nroot(t) == RET_ERROR)
+ goto err;
+
+ /* Global flags. */
+ if (dflags & DB_LOCK)
+ F_SET(t, B_DB_LOCK);
+ if (dflags & DB_SHMEM)
+ F_SET(t, B_DB_SHMEM);
+ if (dflags & DB_TXN)
+ F_SET(t, B_DB_TXN);
+
+ return (dbp);
+
+einval: errno = EINVAL;
+ goto err;
+
+eftype: errno = EFTYPE;
+ goto err;
+
+err: saved_errno = errno;
+ if (t) {
+ if (t->bt_dbp)
+ free(t->bt_dbp);
+ if (t->bt_fd != -1)
+ (void)_close(t->bt_fd);
+ free(t);
+ }
+ errno = saved_errno;
+ return (NULL);
+}
+
+/*
+ * NROOT -- Create the root of a new tree.
+ *
+ * Parameters:
+ * t: tree
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS
+ */
+static int
+nroot(BTREE *t)
+{
+ PAGE *meta, *root;
+ pgno_t npg;
+
+ if ((root = mpool_get(t->bt_mp, 1, 0)) != NULL) {
+ if (root->lower == 0 &&
+ root->pgno == 0 &&
+ root->linp[0] == 0) {
+ mpool_delete(t->bt_mp, root);
+ errno = EINVAL;
+ } else {
+ mpool_put(t->bt_mp, root, 0);
+ return (RET_SUCCESS);
+ }
+ }
+ if (errno != EINVAL) /* It's OK to not exist. */
+ return (RET_ERROR);
+ errno = 0;
+
+ if ((meta = mpool_new(t->bt_mp, &npg, MPOOL_PAGE_NEXT)) == NULL)
+ return (RET_ERROR);
+
+ if ((root = mpool_new(t->bt_mp, &npg, MPOOL_PAGE_NEXT)) == NULL)
+ return (RET_ERROR);
+
+ if (npg != P_ROOT)
+ return (RET_ERROR);
+ root->pgno = npg;
+ root->prevpg = root->nextpg = P_INVALID;
+ root->lower = BTDATAOFF;
+ root->upper = t->bt_psize;
+ root->flags = P_BLEAF;
+ memset(meta, 0, t->bt_psize);
+ mpool_put(t->bt_mp, meta, MPOOL_DIRTY);
+ mpool_put(t->bt_mp, root, MPOOL_DIRTY);
+ return (RET_SUCCESS);
+}
+
+static int
+tmp(void)
+{
+ sigset_t set, oset;
+ int fd, len;
+ char *envtmp = NULL;
+ char path[MAXPATHLEN];
+
+ if (issetugid() == 0)
+ envtmp = getenv("TMPDIR");
+ len = snprintf(path,
+ sizeof(path), "%s/bt.XXXXXXXXXX", envtmp ? envtmp : "/tmp");
+ if (len < 0 || len >= (int)sizeof(path)) {
+ errno = ENAMETOOLONG;
+ return(-1);
+ }
+
+ (void)sigfillset(&set);
+ (void)_sigprocmask(SIG_BLOCK, &set, &oset);
+ if ((fd = mkstemp(path)) != -1)
+ (void)unlink(path);
+ (void)_sigprocmask(SIG_SETMASK, &oset, NULL);
+ return(fd);
+}
+
+static int
+byteorder(void)
+{
+ u_int32_t x;
+ u_char *p;
+
+ x = 0x01020304;
+ p = (u_char *)&x;
+ switch (*p) {
+ case 1:
+ return (BIG_ENDIAN);
+ case 4:
+ return (LITTLE_ENDIAN);
+ default:
+ return (0);
+ }
+}
+
+int
+__bt_fd(const DB *dbp)
+{
+ BTREE *t;
+
+ t = dbp->internal;
+
+ /* Toss any page pinned across calls. */
+ if (t->bt_pinned != NULL) {
+ mpool_put(t->bt_mp, t->bt_pinned, 0);
+ t->bt_pinned = NULL;
+ }
+
+ /* In-memory database can't have a file descriptor. */
+ if (F_ISSET(t, B_INMEM)) {
+ errno = ENOENT;
+ return (-1);
+ }
+ return (t->bt_fd);
+}
diff --git a/freebsd-userspace/lib/libc/db/btree/bt_overflow.c b/freebsd-userspace/lib/libc/db/btree/bt_overflow.c
new file mode 100644
index 0000000..7079453
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/btree/bt_overflow.c
@@ -0,0 +1,218 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_overflow.c 8.5 (Berkeley) 7/16/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <db.h>
+#include "btree.h"
+
+/*
+ * Big key/data code.
+ *
+ * Big key and data entries are stored on linked lists of pages. The initial
+ * reference is byte string stored with the key or data and is the page number
+ * and size. The actual record is stored in a chain of pages linked by the
+ * nextpg field of the PAGE header.
+ *
+ * The first page of the chain has a special property. If the record is used
+ * by an internal page, it cannot be deleted and the P_PRESERVE bit will be set
+ * in the header.
+ *
+ * XXX
+ * A single DBT is written to each chain, so a lot of space on the last page
+ * is wasted. This is a fairly major bug for some data sets.
+ */
+
+/*
+ * __OVFL_GET -- Get an overflow key/data item.
+ *
+ * Parameters:
+ * t: tree
+ * p: pointer to { pgno_t, u_int32_t }
+ * buf: storage address
+ * bufsz: storage size
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS
+ */
+int
+__ovfl_get(BTREE *t, void *p, size_t *ssz, void **buf, size_t *bufsz)
+{
+ PAGE *h;
+ pgno_t pg;
+ size_t nb, plen;
+ u_int32_t sz;
+
+ memmove(&pg, p, sizeof(pgno_t));
+ memmove(&sz, (char *)p + sizeof(pgno_t), sizeof(u_int32_t));
+ *ssz = sz;
+
+#ifdef DEBUG
+ if (pg == P_INVALID || sz == 0)
+ abort();
+#endif
+ /* Make the buffer bigger as necessary. */
+ if (*bufsz < sz) {
+ *buf = reallocf(*buf, sz);
+ if (*buf == NULL)
+ return (RET_ERROR);
+ *bufsz = sz;
+ }
+
+ /*
+ * Step through the linked list of pages, copying the data on each one
+ * into the buffer. Never copy more than the data's length.
+ */
+ plen = t->bt_psize - BTDATAOFF;
+ for (p = *buf;; p = (char *)p + nb, pg = h->nextpg) {
+ if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+ return (RET_ERROR);
+
+ nb = MIN(sz, plen);
+ memmove(p, (char *)h + BTDATAOFF, nb);
+ mpool_put(t->bt_mp, h, 0);
+
+ if ((sz -= nb) == 0)
+ break;
+ }
+ return (RET_SUCCESS);
+}
+
+/*
+ * __OVFL_PUT -- Store an overflow key/data item.
+ *
+ * Parameters:
+ * t: tree
+ * data: DBT to store
+ * pgno: storage page number
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS
+ */
+int
+__ovfl_put(BTREE *t, const DBT *dbt, pgno_t *pg)
+{
+ PAGE *h, *last;
+ void *p;
+ pgno_t npg;
+ size_t nb, plen;
+ u_int32_t sz;
+
+ /*
+ * Allocate pages and copy the key/data record into them. Store the
+ * number of the first page in the chain.
+ */
+ plen = t->bt_psize - BTDATAOFF;
+ for (last = NULL, p = dbt->data, sz = dbt->size;;
+ p = (char *)p + plen, last = h) {
+ if ((h = __bt_new(t, &npg)) == NULL)
+ return (RET_ERROR);
+
+ h->pgno = npg;
+ h->nextpg = h->prevpg = P_INVALID;
+ h->flags = P_OVERFLOW;
+ h->lower = h->upper = 0;
+
+ nb = MIN(sz, plen);
+ memmove((char *)h + BTDATAOFF, p, nb);
+
+ if (last) {
+ last->nextpg = h->pgno;
+ mpool_put(t->bt_mp, last, MPOOL_DIRTY);
+ } else
+ *pg = h->pgno;
+
+ if ((sz -= nb) == 0) {
+ mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+ break;
+ }
+ }
+ return (RET_SUCCESS);
+}
+
+/*
+ * __OVFL_DELETE -- Delete an overflow chain.
+ *
+ * Parameters:
+ * t: tree
+ * p: pointer to { pgno_t, u_int32_t }
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS
+ */
+int
+__ovfl_delete(BTREE *t, void *p)
+{
+ PAGE *h;
+ pgno_t pg;
+ size_t plen;
+ u_int32_t sz;
+
+ memmove(&pg, p, sizeof(pgno_t));
+ memmove(&sz, (char *)p + sizeof(pgno_t), sizeof(u_int32_t));
+
+#ifdef DEBUG
+ if (pg == P_INVALID || sz == 0)
+ abort();
+#endif
+ if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+ return (RET_ERROR);
+
+ /* Don't delete chains used by internal pages. */
+ if (h->flags & P_PRESERVE) {
+ mpool_put(t->bt_mp, h, 0);
+ return (RET_SUCCESS);
+ }
+
+ /* Step through the chain, calling the free routine for each page. */
+ for (plen = t->bt_psize - BTDATAOFF;; sz -= plen) {
+ pg = h->nextpg;
+ __bt_free(t, h);
+ if (sz <= plen)
+ break;
+ if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+ return (RET_ERROR);
+ }
+ return (RET_SUCCESS);
+}
diff --git a/freebsd-userspace/lib/libc/db/btree/bt_page.c b/freebsd-userspace/lib/libc/db/btree/bt_page.c
new file mode 100644
index 0000000..dc30566
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/btree/bt_page.c
@@ -0,0 +1,96 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_page.c 8.3 (Berkeley) 7/14/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <stdio.h>
+
+#include <db.h>
+#include "btree.h"
+
+/*
+ * __bt_free --
+ * Put a page on the freelist.
+ *
+ * Parameters:
+ * t: tree
+ * h: page to free
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS
+ *
+ * Side-effect:
+ * mpool_put's the page.
+ */
+int
+__bt_free(BTREE *t, PAGE *h)
+{
+ /* Insert the page at the head of the free list. */
+ h->prevpg = P_INVALID;
+ h->nextpg = t->bt_free;
+ t->bt_free = h->pgno;
+ F_SET(t, B_METADIRTY);
+
+ /* Make sure the page gets written back. */
+ return (mpool_put(t->bt_mp, h, MPOOL_DIRTY));
+}
+
+/*
+ * __bt_new --
+ * Get a new page, preferably from the freelist.
+ *
+ * Parameters:
+ * t: tree
+ * npg: storage for page number.
+ *
+ * Returns:
+ * Pointer to a page, NULL on error.
+ */
+PAGE *
+__bt_new(BTREE *t, pgno_t *npg)
+{
+ PAGE *h;
+
+ if (t->bt_free != P_INVALID &&
+ (h = mpool_get(t->bt_mp, t->bt_free, 0)) != NULL) {
+ *npg = t->bt_free;
+ t->bt_free = h->nextpg;
+ F_SET(t, B_METADIRTY);
+ return (h);
+ }
+ return (mpool_new(t->bt_mp, npg, MPOOL_PAGE_NEXT));
+}
diff --git a/freebsd-userspace/lib/libc/db/btree/bt_put.c b/freebsd-userspace/lib/libc/db/btree/bt_put.c
new file mode 100644
index 0000000..51c241c
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/btree/bt_put.c
@@ -0,0 +1,316 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_put.c 8.8 (Berkeley) 7/26/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <db.h>
+#include "btree.h"
+
+static EPG *bt_fast(BTREE *, const DBT *, const DBT *, int *);
+
+/*
+ * __BT_PUT -- Add a btree item to the tree.
+ *
+ * Parameters:
+ * dbp: pointer to access method
+ * key: key
+ * data: data
+ * flag: R_NOOVERWRITE
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key is already in the
+ * tree and R_NOOVERWRITE specified.
+ */
+int
+__bt_put(const DB *dbp, DBT *key, const DBT *data, u_int flags)
+{
+ BTREE *t;
+ DBT tkey, tdata;
+ EPG *e;
+ PAGE *h;
+ indx_t idx, nxtindex;
+ pgno_t pg;
+ u_int32_t nbytes, tmp;
+ int dflags, exact, status;
+ char *dest, db[NOVFLSIZE], kb[NOVFLSIZE];
+
+ t = dbp->internal;
+
+ /* Toss any page pinned across calls. */
+ if (t->bt_pinned != NULL) {
+ mpool_put(t->bt_mp, t->bt_pinned, 0);
+ t->bt_pinned = NULL;
+ }
+
+ /* Check for change to a read-only tree. */
+ if (F_ISSET(t, B_RDONLY)) {
+ errno = EPERM;
+ return (RET_ERROR);
+ }
+
+ switch (flags) {
+ case 0:
+ case R_NOOVERWRITE:
+ break;
+ case R_CURSOR:
+ /*
+ * If flags is R_CURSOR, put the cursor. Must already
+ * have started a scan and not have already deleted it.
+ */
+ if (F_ISSET(&t->bt_cursor, CURS_INIT) &&
+ !F_ISSET(&t->bt_cursor,
+ CURS_ACQUIRE | CURS_AFTER | CURS_BEFORE))
+ break;
+ /* FALLTHROUGH */
+ default:
+ errno = EINVAL;
+ return (RET_ERROR);
+ }
+
+ /*
+ * If the key/data pair won't fit on a page, store it on overflow
+ * pages. Only put the key on the overflow page if the pair are
+ * still too big after moving the data to an overflow page.
+ *
+ * XXX
+ * If the insert fails later on, the overflow pages aren't recovered.
+ */
+ dflags = 0;
+ if (key->size + data->size > t->bt_ovflsize) {
+ if (key->size > t->bt_ovflsize) {
+storekey: if (__ovfl_put(t, key, &pg) == RET_ERROR)
+ return (RET_ERROR);
+ tkey.data = kb;
+ tkey.size = NOVFLSIZE;
+ memmove(kb, &pg, sizeof(pgno_t));
+ tmp = key->size;
+ memmove(kb + sizeof(pgno_t),
+ &tmp, sizeof(u_int32_t));
+ dflags |= P_BIGKEY;
+ key = &tkey;
+ }
+ if (key->size + data->size > t->bt_ovflsize) {
+ if (__ovfl_put(t, data, &pg) == RET_ERROR)
+ return (RET_ERROR);
+ tdata.data = db;
+ tdata.size = NOVFLSIZE;
+ memmove(db, &pg, sizeof(pgno_t));
+ tmp = data->size;
+ memmove(db + sizeof(pgno_t),
+ &tmp, sizeof(u_int32_t));
+ dflags |= P_BIGDATA;
+ data = &tdata;
+ }
+ if (key->size + data->size > t->bt_ovflsize)
+ goto storekey;
+ }
+
+ /* Replace the cursor. */
+ if (flags == R_CURSOR) {
+ if ((h = mpool_get(t->bt_mp, t->bt_cursor.pg.pgno, 0)) == NULL)
+ return (RET_ERROR);
+ idx = t->bt_cursor.pg.index;
+ goto delete;
+ }
+
+ /*
+ * Find the key to delete, or, the location at which to insert.
+ * Bt_fast and __bt_search both pin the returned page.
+ */
+ if (t->bt_order == NOT || (e = bt_fast(t, key, data, &exact)) == NULL)
+ if ((e = __bt_search(t, key, &exact)) == NULL)
+ return (RET_ERROR);
+ h = e->page;
+ idx = e->index;
+
+ /*
+ * Add the key/data pair to the tree. If an identical key is already
+ * in the tree, and R_NOOVERWRITE is set, an error is returned. If
+ * R_NOOVERWRITE is not set, the key is either added (if duplicates are
+ * permitted) or an error is returned.
+ */
+ switch (flags) {
+ case R_NOOVERWRITE:
+ if (!exact)
+ break;
+ mpool_put(t->bt_mp, h, 0);
+ return (RET_SPECIAL);
+ default:
+ if (!exact || !F_ISSET(t, B_NODUPS))
+ break;
+ /*
+ * !!!
+ * Note, the delete may empty the page, so we need to put a
+ * new entry into the page immediately.
+ */
+delete: if (__bt_dleaf(t, key, h, idx) == RET_ERROR) {
+ mpool_put(t->bt_mp, h, 0);
+ return (RET_ERROR);
+ }
+ break;
+ }
+
+ /*
+ * If not enough room, or the user has put a ceiling on the number of
+ * keys permitted in the page, split the page. The split code will
+ * insert the key and data and unpin the current page. If inserting
+ * into the offset array, shift the pointers up.
+ */
+ nbytes = NBLEAFDBT(key->size, data->size);
+ if ((u_int32_t)(h->upper - h->lower) < nbytes + sizeof(indx_t)) {
+ if ((status = __bt_split(t, h, key,
+ data, dflags, nbytes, idx)) != RET_SUCCESS)
+ return (status);
+ goto success;
+ }
+
+ if (idx < (nxtindex = NEXTINDEX(h)))
+ memmove(h->linp + idx + 1, h->linp + idx,
+ (nxtindex - idx) * sizeof(indx_t));
+ h->lower += sizeof(indx_t);
+
+ h->linp[idx] = h->upper -= nbytes;
+ dest = (char *)h + h->upper;
+ WR_BLEAF(dest, key, data, dflags);
+
+ /* If the cursor is on this page, adjust it as necessary. */
+ if (F_ISSET(&t->bt_cursor, CURS_INIT) &&
+ !F_ISSET(&t->bt_cursor, CURS_ACQUIRE) &&
+ t->bt_cursor.pg.pgno == h->pgno && t->bt_cursor.pg.index >= idx)
+ ++t->bt_cursor.pg.index;
+
+ if (t->bt_order == NOT) {
+ if (h->nextpg == P_INVALID) {
+ if (idx == NEXTINDEX(h) - 1) {
+ t->bt_order = FORWARD;
+ t->bt_last.index = idx;
+ t->bt_last.pgno = h->pgno;
+ }
+ } else if (h->prevpg == P_INVALID) {
+ if (idx == 0) {
+ t->bt_order = BACK;
+ t->bt_last.index = 0;
+ t->bt_last.pgno = h->pgno;
+ }
+ }
+ }
+
+ mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+
+success:
+ if (flags == R_SETCURSOR)
+ __bt_setcur(t, e->page->pgno, e->index);
+
+ F_SET(t, B_MODIFIED);
+ return (RET_SUCCESS);
+}
+
+#ifdef STATISTICS
+u_long bt_cache_hit, bt_cache_miss;
+#endif
+
+/*
+ * BT_FAST -- Do a quick check for sorted data.
+ *
+ * Parameters:
+ * t: tree
+ * key: key to insert
+ *
+ * Returns:
+ * EPG for new record or NULL if not found.
+ */
+static EPG *
+bt_fast(BTREE *t, const DBT *key, const DBT *data, int *exactp)
+{
+ PAGE *h;
+ u_int32_t nbytes;
+ int cmp;
+
+ if ((h = mpool_get(t->bt_mp, t->bt_last.pgno, 0)) == NULL) {
+ t->bt_order = NOT;
+ return (NULL);
+ }
+ t->bt_cur.page = h;
+ t->bt_cur.index = t->bt_last.index;
+
+ /*
+ * If won't fit in this page or have too many keys in this page,
+ * have to search to get split stack.
+ */
+ nbytes = NBLEAFDBT(key->size, data->size);
+ if ((u_int32_t)(h->upper - h->lower) < nbytes + sizeof(indx_t))
+ goto miss;
+
+ if (t->bt_order == FORWARD) {
+ if (t->bt_cur.page->nextpg != P_INVALID)
+ goto miss;
+ if (t->bt_cur.index != NEXTINDEX(h) - 1)
+ goto miss;
+ if ((cmp = __bt_cmp(t, key, &t->bt_cur)) < 0)
+ goto miss;
+ t->bt_last.index = cmp ? ++t->bt_cur.index : t->bt_cur.index;
+ } else {
+ if (t->bt_cur.page->prevpg != P_INVALID)
+ goto miss;
+ if (t->bt_cur.index != 0)
+ goto miss;
+ if ((cmp = __bt_cmp(t, key, &t->bt_cur)) > 0)
+ goto miss;
+ t->bt_last.index = 0;
+ }
+ *exactp = cmp == 0;
+#ifdef STATISTICS
+ ++bt_cache_hit;
+#endif
+ return (&t->bt_cur);
+
+miss:
+#ifdef STATISTICS
+ ++bt_cache_miss;
+#endif
+ t->bt_order = NOT;
+ mpool_put(t->bt_mp, h, 0);
+ return (NULL);
+}
diff --git a/freebsd-userspace/lib/libc/db/btree/bt_search.c b/freebsd-userspace/lib/libc/db/btree/bt_search.c
new file mode 100644
index 0000000..d5e859b
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/btree/bt_search.c
@@ -0,0 +1,202 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_search.c 8.8 (Berkeley) 7/31/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <stdio.h>
+
+#include <db.h>
+#include "btree.h"
+
+static int __bt_snext(BTREE *, PAGE *, const DBT *, int *);
+static int __bt_sprev(BTREE *, PAGE *, const DBT *, int *);
+
+/*
+ * __bt_search --
+ * Search a btree for a key.
+ *
+ * Parameters:
+ * t: tree to search
+ * key: key to find
+ * exactp: pointer to exact match flag
+ *
+ * Returns:
+ * The EPG for matching record, if any, or the EPG for the location
+ * of the key, if it were inserted into the tree, is entered into
+ * the bt_cur field of the tree. A pointer to the field is returned.
+ */
+EPG *
+__bt_search(BTREE *t, const DBT *key, int *exactp)
+{
+ PAGE *h;
+ indx_t base, idx, lim;
+ pgno_t pg;
+ int cmp;
+
+ BT_CLR(t);
+ for (pg = P_ROOT;;) {
+ if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+ return (NULL);
+
+ /* Do a binary search on the current page. */
+ t->bt_cur.page = h;
+ for (base = 0, lim = NEXTINDEX(h); lim; lim >>= 1) {
+ t->bt_cur.index = idx = base + (lim >> 1);
+ if ((cmp = __bt_cmp(t, key, &t->bt_cur)) == 0) {
+ if (h->flags & P_BLEAF) {
+ *exactp = 1;
+ return (&t->bt_cur);
+ }
+ goto next;
+ }
+ if (cmp > 0) {
+ base = idx + 1;
+ --lim;
+ }
+ }
+
+ /*
+ * If it's a leaf page, we're almost done. If no duplicates
+ * are allowed, or we have an exact match, we're done. Else,
+ * it's possible that there were matching keys on this page,
+ * which later deleted, and we're on a page with no matches
+ * while there are matches on other pages. If at the start or
+ * end of a page, check the adjacent page.
+ */
+ if (h->flags & P_BLEAF) {
+ if (!F_ISSET(t, B_NODUPS)) {
+ if (base == 0 &&
+ h->prevpg != P_INVALID &&
+ __bt_sprev(t, h, key, exactp))
+ return (&t->bt_cur);
+ if (base == NEXTINDEX(h) &&
+ h->nextpg != P_INVALID &&
+ __bt_snext(t, h, key, exactp))
+ return (&t->bt_cur);
+ }
+ *exactp = 0;
+ t->bt_cur.index = base;
+ return (&t->bt_cur);
+ }
+
+ /*
+ * No match found. Base is the smallest index greater than
+ * key and may be zero or a last + 1 index. If it's non-zero,
+ * decrement by one, and record the internal page which should
+ * be a parent page for the key. If a split later occurs, the
+ * inserted page will be to the right of the saved page.
+ */
+ idx = base ? base - 1 : base;
+
+next: BT_PUSH(t, h->pgno, idx);
+ pg = GETBINTERNAL(h, idx)->pgno;
+ mpool_put(t->bt_mp, h, 0);
+ }
+}
+
+/*
+ * __bt_snext --
+ * Check for an exact match after the key.
+ *
+ * Parameters:
+ * t: tree
+ * h: current page
+ * key: key
+ * exactp: pointer to exact match flag
+ *
+ * Returns:
+ * If an exact match found.
+ */
+static int
+__bt_snext(BTREE *t, PAGE *h, const DBT *key, int *exactp)
+{
+ EPG e;
+
+ /*
+ * Get the next page. The key is either an exact
+ * match, or not as good as the one we already have.
+ */
+ if ((e.page = mpool_get(t->bt_mp, h->nextpg, 0)) == NULL)
+ return (0);
+ e.index = 0;
+ if (__bt_cmp(t, key, &e) == 0) {
+ mpool_put(t->bt_mp, h, 0);
+ t->bt_cur = e;
+ *exactp = 1;
+ return (1);
+ }
+ mpool_put(t->bt_mp, e.page, 0);
+ return (0);
+}
+
+/*
+ * __bt_sprev --
+ * Check for an exact match before the key.
+ *
+ * Parameters:
+ * t: tree
+ * h: current page
+ * key: key
+ * exactp: pointer to exact match flag
+ *
+ * Returns:
+ * If an exact match found.
+ */
+static int
+__bt_sprev(BTREE *t, PAGE *h, const DBT *key, int *exactp)
+{
+ EPG e;
+
+ /*
+ * Get the previous page. The key is either an exact
+ * match, or not as good as the one we already have.
+ */
+ if ((e.page = mpool_get(t->bt_mp, h->prevpg, 0)) == NULL)
+ return (0);
+ e.index = NEXTINDEX(e.page) - 1;
+ if (__bt_cmp(t, key, &e) == 0) {
+ mpool_put(t->bt_mp, h, 0);
+ t->bt_cur = e;
+ *exactp = 1;
+ return (1);
+ }
+ mpool_put(t->bt_mp, e.page, 0);
+ return (0);
+}
diff --git a/freebsd-userspace/lib/libc/db/btree/bt_seq.c b/freebsd-userspace/lib/libc/db/btree/bt_seq.c
new file mode 100644
index 0000000..5e92c85
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/btree/bt_seq.c
@@ -0,0 +1,443 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_seq.c 8.7 (Berkeley) 7/20/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <db.h>
+#include "btree.h"
+
+static int __bt_first(BTREE *, const DBT *, EPG *, int *);
+static int __bt_seqadv(BTREE *, EPG *, int);
+static int __bt_seqset(BTREE *, EPG *, DBT *, int);
+
+/*
+ * Sequential scan support.
+ *
+ * The tree can be scanned sequentially, starting from either end of the
+ * tree or from any specific key. A scan request before any scanning is
+ * done is initialized as starting from the least node.
+ */
+
+/*
+ * __bt_seq --
+ * Btree sequential scan interface.
+ *
+ * Parameters:
+ * dbp: pointer to access method
+ * key: key for positioning and return value
+ * data: data return value
+ * flags: R_CURSOR, R_FIRST, R_LAST, R_NEXT, R_PREV.
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS or RET_SPECIAL if there's no next key.
+ */
+int
+__bt_seq(const DB *dbp, DBT *key, DBT *data, u_int flags)
+{
+ BTREE *t;
+ EPG e;
+ int status;
+
+ t = dbp->internal;
+
+ /* Toss any page pinned across calls. */
+ if (t->bt_pinned != NULL) {
+ mpool_put(t->bt_mp, t->bt_pinned, 0);
+ t->bt_pinned = NULL;
+ }
+
+ /*
+ * If scan unitialized as yet, or starting at a specific record, set
+ * the scan to a specific key. Both __bt_seqset and __bt_seqadv pin
+ * the page the cursor references if they're successful.
+ */
+ switch (flags) {
+ case R_NEXT:
+ case R_PREV:
+ if (F_ISSET(&t->bt_cursor, CURS_INIT)) {
+ status = __bt_seqadv(t, &e, flags);
+ break;
+ }
+ /* FALLTHROUGH */
+ case R_FIRST:
+ case R_LAST:
+ case R_CURSOR:
+ status = __bt_seqset(t, &e, key, flags);
+ break;
+ default:
+ errno = EINVAL;
+ return (RET_ERROR);
+ }
+
+ if (status == RET_SUCCESS) {
+ __bt_setcur(t, e.page->pgno, e.index);
+
+ status =
+ __bt_ret(t, &e, key, &t->bt_rkey, data, &t->bt_rdata, 0);
+
+ /*
+ * If the user is doing concurrent access, we copied the
+ * key/data, toss the page.
+ */
+ if (F_ISSET(t, B_DB_LOCK))
+ mpool_put(t->bt_mp, e.page, 0);
+ else
+ t->bt_pinned = e.page;
+ }
+ return (status);
+}
+
+/*
+ * __bt_seqset --
+ * Set the sequential scan to a specific key.
+ *
+ * Parameters:
+ * t: tree
+ * ep: storage for returned key
+ * key: key for initial scan position
+ * flags: R_CURSOR, R_FIRST, R_LAST, R_NEXT, R_PREV
+ *
+ * Side effects:
+ * Pins the page the cursor references.
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS or RET_SPECIAL if there's no next key.
+ */
+static int
+__bt_seqset(BTREE *t, EPG *ep, DBT *key, int flags)
+{
+ PAGE *h;
+ pgno_t pg;
+ int exact;
+
+ /*
+ * Find the first, last or specific key in the tree and point the
+ * cursor at it. The cursor may not be moved until a new key has
+ * been found.
+ */
+ switch (flags) {
+ case R_CURSOR: /* Keyed scan. */
+ /*
+ * Find the first instance of the key or the smallest key
+ * which is greater than or equal to the specified key.
+ */
+ if (key->data == NULL || key->size == 0) {
+ errno = EINVAL;
+ return (RET_ERROR);
+ }
+ return (__bt_first(t, key, ep, &exact));
+ case R_FIRST: /* First record. */
+ case R_NEXT:
+ /* Walk down the left-hand side of the tree. */
+ for (pg = P_ROOT;;) {
+ if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+ return (RET_ERROR);
+
+ /* Check for an empty tree. */
+ if (NEXTINDEX(h) == 0) {
+ mpool_put(t->bt_mp, h, 0);
+ return (RET_SPECIAL);
+ }
+
+ if (h->flags & (P_BLEAF | P_RLEAF))
+ break;
+ pg = GETBINTERNAL(h, 0)->pgno;
+ mpool_put(t->bt_mp, h, 0);
+ }
+ ep->page = h;
+ ep->index = 0;
+ break;
+ case R_LAST: /* Last record. */
+ case R_PREV:
+ /* Walk down the right-hand side of the tree. */
+ for (pg = P_ROOT;;) {
+ if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+ return (RET_ERROR);
+
+ /* Check for an empty tree. */
+ if (NEXTINDEX(h) == 0) {
+ mpool_put(t->bt_mp, h, 0);
+ return (RET_SPECIAL);
+ }
+
+ if (h->flags & (P_BLEAF | P_RLEAF))
+ break;
+ pg = GETBINTERNAL(h, NEXTINDEX(h) - 1)->pgno;
+ mpool_put(t->bt_mp, h, 0);
+ }
+
+ ep->page = h;
+ ep->index = NEXTINDEX(h) - 1;
+ break;
+ }
+ return (RET_SUCCESS);
+}
+
+/*
+ * __bt_seqadvance --
+ * Advance the sequential scan.
+ *
+ * Parameters:
+ * t: tree
+ * flags: R_NEXT, R_PREV
+ *
+ * Side effects:
+ * Pins the page the new key/data record is on.
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS or RET_SPECIAL if there's no next key.
+ */
+static int
+__bt_seqadv(BTREE *t, EPG *ep, int flags)
+{
+ CURSOR *c;
+ PAGE *h;
+ indx_t idx;
+ pgno_t pg;
+ int exact;
+
+ /*
+ * There are a couple of states that we can be in. The cursor has
+ * been initialized by the time we get here, but that's all we know.
+ */
+ c = &t->bt_cursor;
+
+ /*
+ * The cursor was deleted where there weren't any duplicate records,
+ * so the key was saved. Find out where that key would go in the
+ * current tree. It doesn't matter if the returned key is an exact
+ * match or not -- if it's an exact match, the record was added after
+ * the delete so we can just return it. If not, as long as there's
+ * a record there, return it.
+ */
+ if (F_ISSET(c, CURS_ACQUIRE))
+ return (__bt_first(t, &c->key, ep, &exact));
+
+ /* Get the page referenced by the cursor. */
+ if ((h = mpool_get(t->bt_mp, c->pg.pgno, 0)) == NULL)
+ return (RET_ERROR);
+
+ /*
+ * Find the next/previous record in the tree and point the cursor at
+ * it. The cursor may not be moved until a new key has been found.
+ */
+ switch (flags) {
+ case R_NEXT: /* Next record. */
+ /*
+ * The cursor was deleted in duplicate records, and moved
+ * forward to a record that has yet to be returned. Clear
+ * that flag, and return the record.
+ */
+ if (F_ISSET(c, CURS_AFTER))
+ goto usecurrent;
+ idx = c->pg.index;
+ if (++idx == NEXTINDEX(h)) {
+ pg = h->nextpg;
+ mpool_put(t->bt_mp, h, 0);
+ if (pg == P_INVALID)
+ return (RET_SPECIAL);
+ if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+ return (RET_ERROR);
+ idx = 0;
+ }
+ break;
+ case R_PREV: /* Previous record. */
+ /*
+ * The cursor was deleted in duplicate records, and moved
+ * backward to a record that has yet to be returned. Clear
+ * that flag, and return the record.
+ */
+ if (F_ISSET(c, CURS_BEFORE)) {
+usecurrent: F_CLR(c, CURS_AFTER | CURS_BEFORE);
+ ep->page = h;
+ ep->index = c->pg.index;
+ return (RET_SUCCESS);
+ }
+ idx = c->pg.index;
+ if (idx == 0) {
+ pg = h->prevpg;
+ mpool_put(t->bt_mp, h, 0);
+ if (pg == P_INVALID)
+ return (RET_SPECIAL);
+ if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+ return (RET_ERROR);
+ idx = NEXTINDEX(h) - 1;
+ } else
+ --idx;
+ break;
+ }
+
+ ep->page = h;
+ ep->index = idx;
+ return (RET_SUCCESS);
+}
+
+/*
+ * __bt_first --
+ * Find the first entry.
+ *
+ * Parameters:
+ * t: the tree
+ * key: the key
+ * erval: return EPG
+ * exactp: pointer to exact match flag
+ *
+ * Returns:
+ * The first entry in the tree greater than or equal to key,
+ * or RET_SPECIAL if no such key exists.
+ */
+static int
+__bt_first(BTREE *t, const DBT *key, EPG *erval, int *exactp)
+{
+ PAGE *h;
+ EPG *ep, save;
+ pgno_t pg;
+
+ /*
+ * Find any matching record; __bt_search pins the page.
+ *
+ * If it's an exact match and duplicates are possible, walk backwards
+ * in the tree until we find the first one. Otherwise, make sure it's
+ * a valid key (__bt_search may return an index just past the end of a
+ * page) and return it.
+ */
+ if ((ep = __bt_search(t, key, exactp)) == NULL)
+ return (0);
+ if (*exactp) {
+ if (F_ISSET(t, B_NODUPS)) {
+ *erval = *ep;
+ return (RET_SUCCESS);
+ }
+
+ /*
+ * Walk backwards, as long as the entry matches and there are
+ * keys left in the tree. Save a copy of each match in case
+ * we go too far.
+ */
+ save = *ep;
+ h = ep->page;
+ do {
+ if (save.page->pgno != ep->page->pgno) {
+ mpool_put(t->bt_mp, save.page, 0);
+ save = *ep;
+ } else
+ save.index = ep->index;
+
+ /*
+ * Don't unpin the page the last (or original) match
+ * was on, but make sure it's unpinned if an error
+ * occurs.
+ */
+ if (ep->index == 0) {
+ if (h->prevpg == P_INVALID)
+ break;
+ if (h->pgno != save.page->pgno)
+ mpool_put(t->bt_mp, h, 0);
+ if ((h = mpool_get(t->bt_mp,
+ h->prevpg, 0)) == NULL) {
+ if (h->pgno == save.page->pgno)
+ mpool_put(t->bt_mp,
+ save.page, 0);
+ return (RET_ERROR);
+ }
+ ep->page = h;
+ ep->index = NEXTINDEX(h);
+ }
+ --ep->index;
+ } while (__bt_cmp(t, key, ep) == 0);
+
+ /*
+ * Reach here with the last page that was looked at pinned,
+ * which may or may not be the same as the last (or original)
+ * match page. If it's not useful, release it.
+ */
+ if (h->pgno != save.page->pgno)
+ mpool_put(t->bt_mp, h, 0);
+
+ *erval = save;
+ return (RET_SUCCESS);
+ }
+
+ /* If at the end of a page, find the next entry. */
+ if (ep->index == NEXTINDEX(ep->page)) {
+ h = ep->page;
+ pg = h->nextpg;
+ mpool_put(t->bt_mp, h, 0);
+ if (pg == P_INVALID)
+ return (RET_SPECIAL);
+ if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+ return (RET_ERROR);
+ ep->index = 0;
+ ep->page = h;
+ }
+ *erval = *ep;
+ return (RET_SUCCESS);
+}
+
+/*
+ * __bt_setcur --
+ * Set the cursor to an entry in the tree.
+ *
+ * Parameters:
+ * t: the tree
+ * pgno: page number
+ * idx: page index
+ */
+void
+__bt_setcur(BTREE *t, pgno_t pgno, u_int idx)
+{
+ /* Lose any already deleted key. */
+ if (t->bt_cursor.key.data != NULL) {
+ free(t->bt_cursor.key.data);
+ t->bt_cursor.key.size = 0;
+ t->bt_cursor.key.data = NULL;
+ }
+ F_CLR(&t->bt_cursor, CURS_ACQUIRE | CURS_AFTER | CURS_BEFORE);
+
+ /* Update the cursor. */
+ t->bt_cursor.pg.pgno = pgno;
+ t->bt_cursor.pg.index = idx;
+ F_SET(&t->bt_cursor, CURS_INIT);
+}
diff --git a/freebsd-userspace/lib/libc/db/btree/bt_split.c b/freebsd-userspace/lib/libc/db/btree/bt_split.c
new file mode 100644
index 0000000..e47de80
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/btree/bt_split.c
@@ -0,0 +1,798 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_split.c 8.10 (Berkeley) 1/9/95";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <db.h>
+#include "btree.h"
+
+static int bt_broot(BTREE *, PAGE *, PAGE *, PAGE *);
+static PAGE *bt_page(BTREE *, PAGE *, PAGE **, PAGE **, indx_t *, size_t);
+static int bt_preserve(BTREE *, pgno_t);
+static PAGE *bt_psplit(BTREE *, PAGE *, PAGE *, PAGE *, indx_t *, size_t);
+static PAGE *bt_root(BTREE *, PAGE *, PAGE **, PAGE **, indx_t *, size_t);
+static int bt_rroot(BTREE *, PAGE *, PAGE *, PAGE *);
+static recno_t rec_total(PAGE *);
+
+#ifdef STATISTICS
+u_long bt_rootsplit, bt_split, bt_sortsplit, bt_pfxsaved;
+#endif
+
+/*
+ * __BT_SPLIT -- Split the tree.
+ *
+ * Parameters:
+ * t: tree
+ * sp: page to split
+ * key: key to insert
+ * data: data to insert
+ * flags: BIGKEY/BIGDATA flags
+ * ilen: insert length
+ * skip: index to leave open
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS
+ */
+int
+__bt_split(BTREE *t, PAGE *sp, const DBT *key, const DBT *data, int flags,
+ size_t ilen, u_int32_t argskip)
+{
+ BINTERNAL *bi;
+ BLEAF *bl, *tbl;
+ DBT a, b;
+ EPGNO *parent;
+ PAGE *h, *l, *r, *lchild, *rchild;
+ indx_t nxtindex;
+ u_int16_t skip;
+ u_int32_t n, nbytes, nksize;
+ int parentsplit;
+ char *dest;
+
+ /*
+ * Split the page into two pages, l and r. The split routines return
+ * a pointer to the page into which the key should be inserted and with
+ * skip set to the offset which should be used. Additionally, l and r
+ * are pinned.
+ */
+ skip = argskip;
+ h = sp->pgno == P_ROOT ?
+ bt_root(t, sp, &l, &r, &skip, ilen) :
+ bt_page(t, sp, &l, &r, &skip, ilen);
+ if (h == NULL)
+ return (RET_ERROR);
+
+ /*
+ * Insert the new key/data pair into the leaf page. (Key inserts
+ * always cause a leaf page to split first.)
+ */
+ h->linp[skip] = h->upper -= ilen;
+ dest = (char *)h + h->upper;
+ if (F_ISSET(t, R_RECNO))
+ WR_RLEAF(dest, data, flags)
+ else
+ WR_BLEAF(dest, key, data, flags)
+
+ /* If the root page was split, make it look right. */
+ if (sp->pgno == P_ROOT &&
+ (F_ISSET(t, R_RECNO) ?
+ bt_rroot(t, sp, l, r) : bt_broot(t, sp, l, r)) == RET_ERROR)
+ goto err2;
+
+ /*
+ * Now we walk the parent page stack -- a LIFO stack of the pages that
+ * were traversed when we searched for the page that split. Each stack
+ * entry is a page number and a page index offset. The offset is for
+ * the page traversed on the search. We've just split a page, so we
+ * have to insert a new key into the parent page.
+ *
+ * If the insert into the parent page causes it to split, may have to
+ * continue splitting all the way up the tree. We stop if the root
+ * splits or the page inserted into didn't have to split to hold the
+ * new key. Some algorithms replace the key for the old page as well
+ * as the new page. We don't, as there's no reason to believe that the
+ * first key on the old page is any better than the key we have, and,
+ * in the case of a key being placed at index 0 causing the split, the
+ * key is unavailable.
+ *
+ * There are a maximum of 5 pages pinned at any time. We keep the left
+ * and right pages pinned while working on the parent. The 5 are the
+ * two children, left parent and right parent (when the parent splits)
+ * and the root page or the overflow key page when calling bt_preserve.
+ * This code must make sure that all pins are released other than the
+ * root page or overflow page which is unlocked elsewhere.
+ */
+ while ((parent = BT_POP(t)) != NULL) {
+ lchild = l;
+ rchild = r;
+
+ /* Get the parent page. */
+ if ((h = mpool_get(t->bt_mp, parent->pgno, 0)) == NULL)
+ goto err2;
+
+ /*
+ * The new key goes ONE AFTER the index, because the split
+ * was to the right.
+ */
+ skip = parent->index + 1;
+
+ /*
+ * Calculate the space needed on the parent page.
+ *
+ * Prefix trees: space hack when inserting into BINTERNAL
+ * pages. Retain only what's needed to distinguish between
+ * the new entry and the LAST entry on the page to its left.
+ * If the keys compare equal, retain the entire key. Note,
+ * we don't touch overflow keys, and the entire key must be
+ * retained for the next-to-left most key on the leftmost
+ * page of each level, or the search will fail. Applicable
+ * ONLY to internal pages that have leaf pages as children.
+ * Further reduction of the key between pairs of internal
+ * pages loses too much information.
+ */
+ switch (rchild->flags & P_TYPE) {
+ case P_BINTERNAL:
+ bi = GETBINTERNAL(rchild, 0);
+ nbytes = NBINTERNAL(bi->ksize);
+ break;
+ case P_BLEAF:
+ bl = GETBLEAF(rchild, 0);
+ nbytes = NBINTERNAL(bl->ksize);
+ if (t->bt_pfx && !(bl->flags & P_BIGKEY) &&
+ (h->prevpg != P_INVALID || skip > 1)) {
+ tbl = GETBLEAF(lchild, NEXTINDEX(lchild) - 1);
+ a.size = tbl->ksize;
+ a.data = tbl->bytes;
+ b.size = bl->ksize;
+ b.data = bl->bytes;
+ nksize = t->bt_pfx(&a, &b);
+ n = NBINTERNAL(nksize);
+ if (n < nbytes) {
+#ifdef STATISTICS
+ bt_pfxsaved += nbytes - n;
+#endif
+ nbytes = n;
+ } else
+ nksize = 0;
+ } else
+ nksize = 0;
+ break;
+ case P_RINTERNAL:
+ case P_RLEAF:
+ nbytes = NRINTERNAL;
+ break;
+ default:
+ abort();
+ }
+
+ /* Split the parent page if necessary or shift the indices. */
+ if ((u_int32_t)(h->upper - h->lower) < nbytes + sizeof(indx_t)) {
+ sp = h;
+ h = h->pgno == P_ROOT ?
+ bt_root(t, h, &l, &r, &skip, nbytes) :
+ bt_page(t, h, &l, &r, &skip, nbytes);
+ if (h == NULL)
+ goto err1;
+ parentsplit = 1;
+ } else {
+ if (skip < (nxtindex = NEXTINDEX(h)))
+ memmove(h->linp + skip + 1, h->linp + skip,
+ (nxtindex - skip) * sizeof(indx_t));
+ h->lower += sizeof(indx_t);
+ parentsplit = 0;
+ }
+
+ /* Insert the key into the parent page. */
+ switch (rchild->flags & P_TYPE) {
+ case P_BINTERNAL:
+ h->linp[skip] = h->upper -= nbytes;
+ dest = (char *)h + h->linp[skip];
+ memmove(dest, bi, nbytes);
+ ((BINTERNAL *)dest)->pgno = rchild->pgno;
+ break;
+ case P_BLEAF:
+ h->linp[skip] = h->upper -= nbytes;
+ dest = (char *)h + h->linp[skip];
+ WR_BINTERNAL(dest, nksize ? nksize : bl->ksize,
+ rchild->pgno, bl->flags & P_BIGKEY);
+ memmove(dest, bl->bytes, nksize ? nksize : bl->ksize);
+ if (bl->flags & P_BIGKEY &&
+ bt_preserve(t, *(pgno_t *)bl->bytes) == RET_ERROR)
+ goto err1;
+ break;
+ case P_RINTERNAL:
+ /*
+ * Update the left page count. If split
+ * added at index 0, fix the correct page.
+ */
+ if (skip > 0)
+ dest = (char *)h + h->linp[skip - 1];
+ else
+ dest = (char *)l + l->linp[NEXTINDEX(l) - 1];
+ ((RINTERNAL *)dest)->nrecs = rec_total(lchild);
+ ((RINTERNAL *)dest)->pgno = lchild->pgno;
+
+ /* Update the right page count. */
+ h->linp[skip] = h->upper -= nbytes;
+ dest = (char *)h + h->linp[skip];
+ ((RINTERNAL *)dest)->nrecs = rec_total(rchild);
+ ((RINTERNAL *)dest)->pgno = rchild->pgno;
+ break;
+ case P_RLEAF:
+ /*
+ * Update the left page count. If split
+ * added at index 0, fix the correct page.
+ */
+ if (skip > 0)
+ dest = (char *)h + h->linp[skip - 1];
+ else
+ dest = (char *)l + l->linp[NEXTINDEX(l) - 1];
+ ((RINTERNAL *)dest)->nrecs = NEXTINDEX(lchild);
+ ((RINTERNAL *)dest)->pgno = lchild->pgno;
+
+ /* Update the right page count. */
+ h->linp[skip] = h->upper -= nbytes;
+ dest = (char *)h + h->linp[skip];
+ ((RINTERNAL *)dest)->nrecs = NEXTINDEX(rchild);
+ ((RINTERNAL *)dest)->pgno = rchild->pgno;
+ break;
+ default:
+ abort();
+ }
+
+ /* Unpin the held pages. */
+ if (!parentsplit) {
+ mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+ break;
+ }
+
+ /* If the root page was split, make it look right. */
+ if (sp->pgno == P_ROOT &&
+ (F_ISSET(t, R_RECNO) ?
+ bt_rroot(t, sp, l, r) : bt_broot(t, sp, l, r)) == RET_ERROR)
+ goto err1;
+
+ mpool_put(t->bt_mp, lchild, MPOOL_DIRTY);
+ mpool_put(t->bt_mp, rchild, MPOOL_DIRTY);
+ }
+
+ /* Unpin the held pages. */
+ mpool_put(t->bt_mp, l, MPOOL_DIRTY);
+ mpool_put(t->bt_mp, r, MPOOL_DIRTY);
+
+ /* Clear any pages left on the stack. */
+ return (RET_SUCCESS);
+
+ /*
+ * If something fails in the above loop we were already walking back
+ * up the tree and the tree is now inconsistent. Nothing much we can
+ * do about it but release any memory we're holding.
+ */
+err1: mpool_put(t->bt_mp, lchild, MPOOL_DIRTY);
+ mpool_put(t->bt_mp, rchild, MPOOL_DIRTY);
+
+err2: mpool_put(t->bt_mp, l, 0);
+ mpool_put(t->bt_mp, r, 0);
+ __dbpanic(t->bt_dbp);
+ return (RET_ERROR);
+}
+
+/*
+ * BT_PAGE -- Split a non-root page of a btree.
+ *
+ * Parameters:
+ * t: tree
+ * h: root page
+ * lp: pointer to left page pointer
+ * rp: pointer to right page pointer
+ * skip: pointer to index to leave open
+ * ilen: insert length
+ *
+ * Returns:
+ * Pointer to page in which to insert or NULL on error.
+ */
+static PAGE *
+bt_page(BTREE *t, PAGE *h, PAGE **lp, PAGE **rp, indx_t *skip, size_t ilen)
+{
+ PAGE *l, *r, *tp;
+ pgno_t npg;
+
+#ifdef STATISTICS
+ ++bt_split;
+#endif
+ /* Put the new right page for the split into place. */
+ if ((r = __bt_new(t, &npg)) == NULL)
+ return (NULL);
+ r->pgno = npg;
+ r->lower = BTDATAOFF;
+ r->upper = t->bt_psize;
+ r->nextpg = h->nextpg;
+ r->prevpg = h->pgno;
+ r->flags = h->flags & P_TYPE;
+
+ /*
+ * If we're splitting the last page on a level because we're appending
+ * a key to it (skip is NEXTINDEX()), it's likely that the data is
+ * sorted. Adding an empty page on the side of the level is less work
+ * and can push the fill factor much higher than normal. If we're
+ * wrong it's no big deal, we'll just do the split the right way next
+ * time. It may look like it's equally easy to do a similar hack for
+ * reverse sorted data, that is, split the tree left, but it's not.
+ * Don't even try.
+ */
+ if (h->nextpg == P_INVALID && *skip == NEXTINDEX(h)) {
+#ifdef STATISTICS
+ ++bt_sortsplit;
+#endif
+ h->nextpg = r->pgno;
+ r->lower = BTDATAOFF + sizeof(indx_t);
+ *skip = 0;
+ *lp = h;
+ *rp = r;
+ return (r);
+ }
+
+ /* Put the new left page for the split into place. */
+ if ((l = (PAGE *)calloc(1, t->bt_psize)) == NULL) {
+ mpool_put(t->bt_mp, r, 0);
+ return (NULL);
+ }
+ l->pgno = h->pgno;
+ l->nextpg = r->pgno;
+ l->prevpg = h->prevpg;
+ l->lower = BTDATAOFF;
+ l->upper = t->bt_psize;
+ l->flags = h->flags & P_TYPE;
+
+ /* Fix up the previous pointer of the page after the split page. */
+ if (h->nextpg != P_INVALID) {
+ if ((tp = mpool_get(t->bt_mp, h->nextpg, 0)) == NULL) {
+ free(l);
+ /* XXX mpool_free(t->bt_mp, r->pgno); */
+ return (NULL);
+ }
+ tp->prevpg = r->pgno;
+ mpool_put(t->bt_mp, tp, MPOOL_DIRTY);
+ }
+
+ /*
+ * Split right. The key/data pairs aren't sorted in the btree page so
+ * it's simpler to copy the data from the split page onto two new pages
+ * instead of copying half the data to the right page and compacting
+ * the left page in place. Since the left page can't change, we have
+ * to swap the original and the allocated left page after the split.
+ */
+ tp = bt_psplit(t, h, l, r, skip, ilen);
+
+ /* Move the new left page onto the old left page. */
+ memmove(h, l, t->bt_psize);
+ if (tp == l)
+ tp = h;
+ free(l);
+
+ *lp = h;
+ *rp = r;
+ return (tp);
+}
+
+/*
+ * BT_ROOT -- Split the root page of a btree.
+ *
+ * Parameters:
+ * t: tree
+ * h: root page
+ * lp: pointer to left page pointer
+ * rp: pointer to right page pointer
+ * skip: pointer to index to leave open
+ * ilen: insert length
+ *
+ * Returns:
+ * Pointer to page in which to insert or NULL on error.
+ */
+static PAGE *
+bt_root(BTREE *t, PAGE *h, PAGE **lp, PAGE **rp, indx_t *skip, size_t ilen)
+{
+ PAGE *l, *r, *tp;
+ pgno_t lnpg, rnpg;
+
+#ifdef STATISTICS
+ ++bt_split;
+ ++bt_rootsplit;
+#endif
+ /* Put the new left and right pages for the split into place. */
+ if ((l = __bt_new(t, &lnpg)) == NULL ||
+ (r = __bt_new(t, &rnpg)) == NULL)
+ return (NULL);
+ l->pgno = lnpg;
+ r->pgno = rnpg;
+ l->nextpg = r->pgno;
+ r->prevpg = l->pgno;
+ l->prevpg = r->nextpg = P_INVALID;
+ l->lower = r->lower = BTDATAOFF;
+ l->upper = r->upper = t->bt_psize;
+ l->flags = r->flags = h->flags & P_TYPE;
+
+ /* Split the root page. */
+ tp = bt_psplit(t, h, l, r, skip, ilen);
+
+ *lp = l;
+ *rp = r;
+ return (tp);
+}
+
+/*
+ * BT_RROOT -- Fix up the recno root page after it has been split.
+ *
+ * Parameters:
+ * t: tree
+ * h: root page
+ * l: left page
+ * r: right page
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS
+ */
+static int
+bt_rroot(BTREE *t, PAGE *h, PAGE *l, PAGE *r)
+{
+ char *dest;
+
+ /* Insert the left and right keys, set the header information. */
+ h->linp[0] = h->upper = t->bt_psize - NRINTERNAL;
+ dest = (char *)h + h->upper;
+ WR_RINTERNAL(dest,
+ l->flags & P_RLEAF ? NEXTINDEX(l) : rec_total(l), l->pgno);
+
+ h->linp[1] = h->upper -= NRINTERNAL;
+ dest = (char *)h + h->upper;
+ WR_RINTERNAL(dest,
+ r->flags & P_RLEAF ? NEXTINDEX(r) : rec_total(r), r->pgno);
+
+ h->lower = BTDATAOFF + 2 * sizeof(indx_t);
+
+ /* Unpin the root page, set to recno internal page. */
+ h->flags &= ~P_TYPE;
+ h->flags |= P_RINTERNAL;
+ mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+
+ return (RET_SUCCESS);
+}
+
+/*
+ * BT_BROOT -- Fix up the btree root page after it has been split.
+ *
+ * Parameters:
+ * t: tree
+ * h: root page
+ * l: left page
+ * r: right page
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS
+ */
+static int
+bt_broot(BTREE *t, PAGE *h, PAGE *l, PAGE *r)
+{
+ BINTERNAL *bi;
+ BLEAF *bl;
+ u_int32_t nbytes;
+ char *dest;
+
+ /*
+ * If the root page was a leaf page, change it into an internal page.
+ * We copy the key we split on (but not the key's data, in the case of
+ * a leaf page) to the new root page.
+ *
+ * The btree comparison code guarantees that the left-most key on any
+ * level of the tree is never used, so it doesn't need to be filled in.
+ */
+ nbytes = NBINTERNAL(0);
+ h->linp[0] = h->upper = t->bt_psize - nbytes;
+ dest = (char *)h + h->upper;
+ WR_BINTERNAL(dest, 0, l->pgno, 0);
+
+ switch (h->flags & P_TYPE) {
+ case P_BLEAF:
+ bl = GETBLEAF(r, 0);
+ nbytes = NBINTERNAL(bl->ksize);
+ h->linp[1] = h->upper -= nbytes;
+ dest = (char *)h + h->upper;
+ WR_BINTERNAL(dest, bl->ksize, r->pgno, 0);
+ memmove(dest, bl->bytes, bl->ksize);
+
+ /*
+ * If the key is on an overflow page, mark the overflow chain
+ * so it isn't deleted when the leaf copy of the key is deleted.
+ */
+ if (bl->flags & P_BIGKEY &&
+ bt_preserve(t, *(pgno_t *)bl->bytes) == RET_ERROR)
+ return (RET_ERROR);
+ break;
+ case P_BINTERNAL:
+ bi = GETBINTERNAL(r, 0);
+ nbytes = NBINTERNAL(bi->ksize);
+ h->linp[1] = h->upper -= nbytes;
+ dest = (char *)h + h->upper;
+ memmove(dest, bi, nbytes);
+ ((BINTERNAL *)dest)->pgno = r->pgno;
+ break;
+ default:
+ abort();
+ }
+
+ /* There are two keys on the page. */
+ h->lower = BTDATAOFF + 2 * sizeof(indx_t);
+
+ /* Unpin the root page, set to btree internal page. */
+ h->flags &= ~P_TYPE;
+ h->flags |= P_BINTERNAL;
+ mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+
+ return (RET_SUCCESS);
+}
+
+/*
+ * BT_PSPLIT -- Do the real work of splitting the page.
+ *
+ * Parameters:
+ * t: tree
+ * h: page to be split
+ * l: page to put lower half of data
+ * r: page to put upper half of data
+ * pskip: pointer to index to leave open
+ * ilen: insert length
+ *
+ * Returns:
+ * Pointer to page in which to insert.
+ */
+static PAGE *
+bt_psplit(BTREE *t, PAGE *h, PAGE *l, PAGE *r, indx_t *pskip, size_t ilen)
+{
+ BINTERNAL *bi;
+ BLEAF *bl;
+ CURSOR *c;
+ RLEAF *rl;
+ PAGE *rval;
+ void *src;
+ indx_t full, half, nxt, off, skip, top, used;
+ u_int32_t nbytes;
+ int bigkeycnt, isbigkey;
+
+ /*
+ * Split the data to the left and right pages. Leave the skip index
+ * open. Additionally, make some effort not to split on an overflow
+ * key. This makes internal page processing faster and can save
+ * space as overflow keys used by internal pages are never deleted.
+ */
+ bigkeycnt = 0;
+ skip = *pskip;
+ full = t->bt_psize - BTDATAOFF;
+ half = full / 2;
+ used = 0;
+ for (nxt = off = 0, top = NEXTINDEX(h); nxt < top; ++off) {
+ if (skip == off) {
+ nbytes = ilen;
+ isbigkey = 0; /* XXX: not really known. */
+ } else
+ switch (h->flags & P_TYPE) {
+ case P_BINTERNAL:
+ src = bi = GETBINTERNAL(h, nxt);
+ nbytes = NBINTERNAL(bi->ksize);
+ isbigkey = bi->flags & P_BIGKEY;
+ break;
+ case P_BLEAF:
+ src = bl = GETBLEAF(h, nxt);
+ nbytes = NBLEAF(bl);
+ isbigkey = bl->flags & P_BIGKEY;
+ break;
+ case P_RINTERNAL:
+ src = GETRINTERNAL(h, nxt);
+ nbytes = NRINTERNAL;
+ isbigkey = 0;
+ break;
+ case P_RLEAF:
+ src = rl = GETRLEAF(h, nxt);
+ nbytes = NRLEAF(rl);
+ isbigkey = 0;
+ break;
+ default:
+ abort();
+ }
+
+ /*
+ * If the key/data pairs are substantial fractions of the max
+ * possible size for the page, it's possible to get situations
+ * where we decide to try and copy too much onto the left page.
+ * Make sure that doesn't happen.
+ */
+ if ((skip <= off && used + nbytes + sizeof(indx_t) >= full) ||
+ nxt == top - 1) {
+ --off;
+ break;
+ }
+
+ /* Copy the key/data pair, if not the skipped index. */
+ if (skip != off) {
+ ++nxt;
+
+ l->linp[off] = l->upper -= nbytes;
+ memmove((char *)l + l->upper, src, nbytes);
+ }
+
+ used += nbytes + sizeof(indx_t);
+ if (used >= half) {
+ if (!isbigkey || bigkeycnt == 3)
+ break;
+ else
+ ++bigkeycnt;
+ }
+ }
+
+ /*
+ * Off is the last offset that's valid for the left page.
+ * Nxt is the first offset to be placed on the right page.
+ */
+ l->lower += (off + 1) * sizeof(indx_t);
+
+ /*
+ * If splitting the page that the cursor was on, the cursor has to be
+ * adjusted to point to the same record as before the split. If the
+ * cursor is at or past the skipped slot, the cursor is incremented by
+ * one. If the cursor is on the right page, it is decremented by the
+ * number of records split to the left page.
+ */
+ c = &t->bt_cursor;
+ if (F_ISSET(c, CURS_INIT) && c->pg.pgno == h->pgno) {
+ if (c->pg.index >= skip)
+ ++c->pg.index;
+ if (c->pg.index < nxt) /* Left page. */
+ c->pg.pgno = l->pgno;
+ else { /* Right page. */
+ c->pg.pgno = r->pgno;
+ c->pg.index -= nxt;
+ }
+ }
+
+ /*
+ * If the skipped index was on the left page, just return that page.
+ * Otherwise, adjust the skip index to reflect the new position on
+ * the right page.
+ */
+ if (skip <= off) {
+ skip = MAX_PAGE_OFFSET;
+ rval = l;
+ } else {
+ rval = r;
+ *pskip -= nxt;
+ }
+
+ for (off = 0; nxt < top; ++off) {
+ if (skip == nxt) {
+ ++off;
+ skip = MAX_PAGE_OFFSET;
+ }
+ switch (h->flags & P_TYPE) {
+ case P_BINTERNAL:
+ src = bi = GETBINTERNAL(h, nxt);
+ nbytes = NBINTERNAL(bi->ksize);
+ break;
+ case P_BLEAF:
+ src = bl = GETBLEAF(h, nxt);
+ nbytes = NBLEAF(bl);
+ break;
+ case P_RINTERNAL:
+ src = GETRINTERNAL(h, nxt);
+ nbytes = NRINTERNAL;
+ break;
+ case P_RLEAF:
+ src = rl = GETRLEAF(h, nxt);
+ nbytes = NRLEAF(rl);
+ break;
+ default:
+ abort();
+ }
+ ++nxt;
+ r->linp[off] = r->upper -= nbytes;
+ memmove((char *)r + r->upper, src, nbytes);
+ }
+ r->lower += off * sizeof(indx_t);
+
+ /* If the key is being appended to the page, adjust the index. */
+ if (skip == top)
+ r->lower += sizeof(indx_t);
+
+ return (rval);
+}
+
+/*
+ * BT_PRESERVE -- Mark a chain of pages as used by an internal node.
+ *
+ * Chains of indirect blocks pointed to by leaf nodes get reclaimed when the
+ * record that references them gets deleted. Chains pointed to by internal
+ * pages never get deleted. This routine marks a chain as pointed to by an
+ * internal page.
+ *
+ * Parameters:
+ * t: tree
+ * pg: page number of first page in the chain.
+ *
+ * Returns:
+ * RET_SUCCESS, RET_ERROR.
+ */
+static int
+bt_preserve(BTREE *t, pgno_t pg)
+{
+ PAGE *h;
+
+ if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+ return (RET_ERROR);
+ h->flags |= P_PRESERVE;
+ mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+ return (RET_SUCCESS);
+}
+
+/*
+ * REC_TOTAL -- Return the number of recno entries below a page.
+ *
+ * Parameters:
+ * h: page
+ *
+ * Returns:
+ * The number of recno entries below a page.
+ *
+ * XXX
+ * These values could be set by the bt_psplit routine. The problem is that the
+ * entry has to be popped off of the stack etc. or the values have to be passed
+ * all the way back to bt_split/bt_rroot and it's not very clean.
+ */
+static recno_t
+rec_total(PAGE *h)
+{
+ recno_t recs;
+ indx_t nxt, top;
+
+ for (recs = 0, nxt = 0, top = NEXTINDEX(h); nxt < top; ++nxt)
+ recs += GETRINTERNAL(h, nxt)->nrecs;
+ return (recs);
+}
diff --git a/freebsd-userspace/lib/libc/db/btree/bt_utils.c b/freebsd-userspace/lib/libc/db/btree/bt_utils.c
new file mode 100644
index 0000000..fbfff3a
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/btree/bt_utils.c
@@ -0,0 +1,248 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bt_utils.c 8.8 (Berkeley) 7/20/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <db.h>
+#include "btree.h"
+
+/*
+ * __bt_ret --
+ * Build return key/data pair.
+ *
+ * Parameters:
+ * t: tree
+ * e: key/data pair to be returned
+ * key: user's key structure (NULL if not to be filled in)
+ * rkey: memory area to hold key
+ * data: user's data structure (NULL if not to be filled in)
+ * rdata: memory area to hold data
+ * copy: always copy the key/data item
+ *
+ * Returns:
+ * RET_SUCCESS, RET_ERROR.
+ */
+int
+__bt_ret(BTREE *t, EPG *e, DBT *key, DBT *rkey, DBT *data, DBT *rdata, int copy)
+{
+ BLEAF *bl;
+ void *p;
+
+ bl = GETBLEAF(e->page, e->index);
+
+ /*
+ * We must copy big keys/data to make them contigous. Otherwise,
+ * leave the page pinned and don't copy unless the user specified
+ * concurrent access.
+ */
+ if (key == NULL)
+ goto dataonly;
+
+ if (bl->flags & P_BIGKEY) {
+ if (__ovfl_get(t, bl->bytes,
+ &key->size, &rkey->data, &rkey->size))
+ return (RET_ERROR);
+ key->data = rkey->data;
+ } else if (copy || F_ISSET(t, B_DB_LOCK)) {
+ if (bl->ksize > rkey->size) {
+ p = realloc(rkey->data, bl->ksize);
+ if (p == NULL)
+ return (RET_ERROR);
+ rkey->data = p;
+ rkey->size = bl->ksize;
+ }
+ memmove(rkey->data, bl->bytes, bl->ksize);
+ key->size = bl->ksize;
+ key->data = rkey->data;
+ } else {
+ key->size = bl->ksize;
+ key->data = bl->bytes;
+ }
+
+dataonly:
+ if (data == NULL)
+ return (RET_SUCCESS);
+
+ if (bl->flags & P_BIGDATA) {
+ if (__ovfl_get(t, bl->bytes + bl->ksize,
+ &data->size, &rdata->data, &rdata->size))
+ return (RET_ERROR);
+ data->data = rdata->data;
+ } else if (copy || F_ISSET(t, B_DB_LOCK)) {
+ /* Use +1 in case the first record retrieved is 0 length. */
+ if (bl->dsize + 1 > rdata->size) {
+ p = realloc(rdata->data, bl->dsize + 1);
+ if (p == NULL)
+ return (RET_ERROR);
+ rdata->data = p;
+ rdata->size = bl->dsize + 1;
+ }
+ memmove(rdata->data, bl->bytes + bl->ksize, bl->dsize);
+ data->size = bl->dsize;
+ data->data = rdata->data;
+ } else {
+ data->size = bl->dsize;
+ data->data = bl->bytes + bl->ksize;
+ }
+
+ return (RET_SUCCESS);
+}
+
+/*
+ * __BT_CMP -- Compare a key to a given record.
+ *
+ * Parameters:
+ * t: tree
+ * k1: DBT pointer of first arg to comparison
+ * e: pointer to EPG for comparison
+ *
+ * Returns:
+ * < 0 if k1 is < record
+ * = 0 if k1 is = record
+ * > 0 if k1 is > record
+ */
+int
+__bt_cmp(BTREE *t, const DBT *k1, EPG *e)
+{
+ BINTERNAL *bi;
+ BLEAF *bl;
+ DBT k2;
+ PAGE *h;
+ void *bigkey;
+
+ /*
+ * The left-most key on internal pages, at any level of the tree, is
+ * guaranteed by the following code to be less than any user key.
+ * This saves us from having to update the leftmost key on an internal
+ * page when the user inserts a new key in the tree smaller than
+ * anything we've yet seen.
+ */
+ h = e->page;
+ if (e->index == 0 && h->prevpg == P_INVALID && !(h->flags & P_BLEAF))
+ return (1);
+
+ bigkey = NULL;
+ if (h->flags & P_BLEAF) {
+ bl = GETBLEAF(h, e->index);
+ if (bl->flags & P_BIGKEY)
+ bigkey = bl->bytes;
+ else {
+ k2.data = bl->bytes;
+ k2.size = bl->ksize;
+ }
+ } else {
+ bi = GETBINTERNAL(h, e->index);
+ if (bi->flags & P_BIGKEY)
+ bigkey = bi->bytes;
+ else {
+ k2.data = bi->bytes;
+ k2.size = bi->ksize;
+ }
+ }
+
+ if (bigkey) {
+ if (__ovfl_get(t, bigkey,
+ &k2.size, &t->bt_rdata.data, &t->bt_rdata.size))
+ return (RET_ERROR);
+ k2.data = t->bt_rdata.data;
+ }
+ return ((*t->bt_cmp)(k1, &k2));
+}
+
+/*
+ * __BT_DEFCMP -- Default comparison routine.
+ *
+ * Parameters:
+ * a: DBT #1
+ * b: DBT #2
+ *
+ * Returns:
+ * < 0 if a is < b
+ * = 0 if a is = b
+ * > 0 if a is > b
+ */
+int
+__bt_defcmp(const DBT *a, const DBT *b)
+{
+ size_t len;
+ u_char *p1, *p2;
+
+ /*
+ * XXX
+ * If a size_t doesn't fit in an int, this routine can lose.
+ * What we need is an integral type which is guaranteed to be
+ * larger than a size_t, and there is no such thing.
+ */
+ len = MIN(a->size, b->size);
+ for (p1 = a->data, p2 = b->data; len--; ++p1, ++p2)
+ if (*p1 != *p2)
+ return ((int)*p1 - (int)*p2);
+ return ((int)a->size - (int)b->size);
+}
+
+/*
+ * __BT_DEFPFX -- Default prefix routine.
+ *
+ * Parameters:
+ * a: DBT #1
+ * b: DBT #2
+ *
+ * Returns:
+ * Number of bytes needed to distinguish b from a.
+ */
+size_t
+__bt_defpfx(const DBT *a, const DBT *b)
+{
+ u_char *p1, *p2;
+ size_t cnt, len;
+
+ cnt = 1;
+ len = MIN(a->size, b->size);
+ for (p1 = a->data, p2 = b->data; len--; ++p1, ++p2, ++cnt)
+ if (*p1 != *p2)
+ return (cnt);
+
+ /* a->size must be <= b->size, or they wouldn't be in this order. */
+ return (a->size < b->size ? a->size + 1 : a->size);
+}
diff --git a/freebsd-userspace/lib/libc/db/btree/btree.h b/freebsd-userspace/lib/libc/db/btree/btree.h
new file mode 100644
index 0000000..a1766dc
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/btree/btree.h
@@ -0,0 +1,380 @@
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)btree.h 8.11 (Berkeley) 8/17/94
+ * $FreeBSD$
+ */
+
+/* Macros to set/clear/test flags. */
+#define F_SET(p, f) (p)->flags |= (f)
+#define F_CLR(p, f) (p)->flags &= ~(f)
+#define F_ISSET(p, f) ((p)->flags & (f))
+
+#include <mpool.h>
+
+#define DEFMINKEYPAGE (2) /* Minimum keys per page */
+#define MINCACHE (5) /* Minimum cached pages */
+#define MINPSIZE (512) /* Minimum page size */
+
+/*
+ * Page 0 of a btree file contains a copy of the meta-data. This page is also
+ * used as an out-of-band page, i.e. page pointers that point to nowhere point
+ * to page 0. Page 1 is the root of the btree.
+ */
+#define P_INVALID 0 /* Invalid tree page number. */
+#define P_META 0 /* Tree metadata page number. */
+#define P_ROOT 1 /* Tree root page number. */
+
+/*
+ * There are five page layouts in the btree: btree internal pages (BINTERNAL),
+ * btree leaf pages (BLEAF), recno internal pages (RINTERNAL), recno leaf pages
+ * (RLEAF) and overflow pages. All five page types have a page header (PAGE).
+ * This implementation requires that values within structures NOT be padded.
+ * (ANSI C permits random padding.) If your compiler pads randomly you'll have
+ * to do some work to get this package to run.
+ */
+typedef struct _page {
+ pgno_t pgno; /* this page's page number */
+ pgno_t prevpg; /* left sibling */
+ pgno_t nextpg; /* right sibling */
+
+#define P_BINTERNAL 0x01 /* btree internal page */
+#define P_BLEAF 0x02 /* leaf page */
+#define P_OVERFLOW 0x04 /* overflow page */
+#define P_RINTERNAL 0x08 /* recno internal page */
+#define P_RLEAF 0x10 /* leaf page */
+#define P_TYPE 0x1f /* type mask */
+#define P_PRESERVE 0x20 /* never delete this chain of pages */
+ u_int32_t flags;
+
+ indx_t lower; /* lower bound of free space on page */
+ indx_t upper; /* upper bound of free space on page */
+ indx_t linp[1]; /* indx_t-aligned VAR. LENGTH DATA */
+} PAGE;
+
+/* First and next index. */
+#define BTDATAOFF \
+ (sizeof(pgno_t) + sizeof(pgno_t) + sizeof(pgno_t) + \
+ sizeof(u_int32_t) + sizeof(indx_t) + sizeof(indx_t))
+#define NEXTINDEX(p) (((p)->lower - BTDATAOFF) / sizeof(indx_t))
+
+/*
+ * For pages other than overflow pages, there is an array of offsets into the
+ * rest of the page immediately following the page header. Each offset is to
+ * an item which is unique to the type of page. The h_lower offset is just
+ * past the last filled-in index. The h_upper offset is the first item on the
+ * page. Offsets are from the beginning of the page.
+ *
+ * If an item is too big to store on a single page, a flag is set and the item
+ * is a { page, size } pair such that the page is the first page of an overflow
+ * chain with size bytes of item. Overflow pages are simply bytes without any
+ * external structure.
+ *
+ * The page number and size fields in the items are pgno_t-aligned so they can
+ * be manipulated without copying. (This presumes that 32 bit items can be
+ * manipulated on this system.)
+ */
+#define LALIGN(n) (((n) + sizeof(pgno_t) - 1) & ~(sizeof(pgno_t) - 1))
+#define NOVFLSIZE (sizeof(pgno_t) + sizeof(u_int32_t))
+
+/*
+ * For the btree internal pages, the item is a key. BINTERNALs are {key, pgno}
+ * pairs, such that the key compares less than or equal to all of the records
+ * on that page. For a tree without duplicate keys, an internal page with two
+ * consecutive keys, a and b, will have all records greater than or equal to a
+ * and less than b stored on the page associated with a. Duplicate keys are
+ * somewhat special and can cause duplicate internal and leaf page records and
+ * some minor modifications of the above rule.
+ */
+typedef struct _binternal {
+ u_int32_t ksize; /* key size */
+ pgno_t pgno; /* page number stored on */
+#define P_BIGDATA 0x01 /* overflow data */
+#define P_BIGKEY 0x02 /* overflow key */
+ u_char flags;
+ char bytes[1]; /* data */
+} BINTERNAL;
+
+/* Get the page's BINTERNAL structure at index indx. */
+#define GETBINTERNAL(pg, indx) \
+ ((BINTERNAL *)((char *)(pg) + (pg)->linp[indx]))
+
+/* Get the number of bytes in the entry. */
+#define NBINTERNAL(len) \
+ LALIGN(sizeof(u_int32_t) + sizeof(pgno_t) + sizeof(u_char) + (len))
+
+/* Copy a BINTERNAL entry to the page. */
+#define WR_BINTERNAL(p, size, pgno, flags) { \
+ *(u_int32_t *)p = size; \
+ p += sizeof(u_int32_t); \
+ *(pgno_t *)p = pgno; \
+ p += sizeof(pgno_t); \
+ *(u_char *)p = flags; \
+ p += sizeof(u_char); \
+}
+
+/*
+ * For the recno internal pages, the item is a page number with the number of
+ * keys found on that page and below.
+ */
+typedef struct _rinternal {
+ recno_t nrecs; /* number of records */
+ pgno_t pgno; /* page number stored below */
+} RINTERNAL;
+
+/* Get the page's RINTERNAL structure at index indx. */
+#define GETRINTERNAL(pg, indx) \
+ ((RINTERNAL *)((char *)(pg) + (pg)->linp[indx]))
+
+/* Get the number of bytes in the entry. */
+#define NRINTERNAL \
+ LALIGN(sizeof(recno_t) + sizeof(pgno_t))
+
+/* Copy a RINTERAL entry to the page. */
+#define WR_RINTERNAL(p, nrecs, pgno) { \
+ *(recno_t *)p = nrecs; \
+ p += sizeof(recno_t); \
+ *(pgno_t *)p = pgno; \
+}
+
+/* For the btree leaf pages, the item is a key and data pair. */
+typedef struct _bleaf {
+ u_int32_t ksize; /* size of key */
+ u_int32_t dsize; /* size of data */
+ u_char flags; /* P_BIGDATA, P_BIGKEY */
+ char bytes[1]; /* data */
+} BLEAF;
+
+/* Get the page's BLEAF structure at index indx. */
+#define GETBLEAF(pg, indx) \
+ ((BLEAF *)((char *)(pg) + (pg)->linp[indx]))
+
+/* Get the number of bytes in the entry. */
+#define NBLEAF(p) NBLEAFDBT((p)->ksize, (p)->dsize)
+
+/* Get the number of bytes in the user's key/data pair. */
+#define NBLEAFDBT(ksize, dsize) \
+ LALIGN(sizeof(u_int32_t) + sizeof(u_int32_t) + sizeof(u_char) + \
+ (ksize) + (dsize))
+
+/* Copy a BLEAF entry to the page. */
+#define WR_BLEAF(p, key, data, flags) { \
+ *(u_int32_t *)p = key->size; \
+ p += sizeof(u_int32_t); \
+ *(u_int32_t *)p = data->size; \
+ p += sizeof(u_int32_t); \
+ *(u_char *)p = flags; \
+ p += sizeof(u_char); \
+ memmove(p, key->data, key->size); \
+ p += key->size; \
+ memmove(p, data->data, data->size); \
+}
+
+/* For the recno leaf pages, the item is a data entry. */
+typedef struct _rleaf {
+ u_int32_t dsize; /* size of data */
+ u_char flags; /* P_BIGDATA */
+ char bytes[1];
+} RLEAF;
+
+/* Get the page's RLEAF structure at index indx. */
+#define GETRLEAF(pg, indx) \
+ ((RLEAF *)((char *)(pg) + (pg)->linp[indx]))
+
+/* Get the number of bytes in the entry. */
+#define NRLEAF(p) NRLEAFDBT((p)->dsize)
+
+/* Get the number of bytes from the user's data. */
+#define NRLEAFDBT(dsize) \
+ LALIGN(sizeof(u_int32_t) + sizeof(u_char) + (dsize))
+
+/* Copy a RLEAF entry to the page. */
+#define WR_RLEAF(p, data, flags) { \
+ *(u_int32_t *)p = data->size; \
+ p += sizeof(u_int32_t); \
+ *(u_char *)p = flags; \
+ p += sizeof(u_char); \
+ memmove(p, data->data, data->size); \
+}
+
+/*
+ * A record in the tree is either a pointer to a page and an index in the page
+ * or a page number and an index. These structures are used as a cursor, stack
+ * entry and search returns as well as to pass records to other routines.
+ *
+ * One comment about searches. Internal page searches must find the largest
+ * record less than key in the tree so that descents work. Leaf page searches
+ * must find the smallest record greater than key so that the returned index
+ * is the record's correct position for insertion.
+ */
+typedef struct _epgno {
+ pgno_t pgno; /* the page number */
+ indx_t index; /* the index on the page */
+} EPGNO;
+
+typedef struct _epg {
+ PAGE *page; /* the (pinned) page */
+ indx_t index; /* the index on the page */
+} EPG;
+
+/*
+ * About cursors. The cursor (and the page that contained the key/data pair
+ * that it referenced) can be deleted, which makes things a bit tricky. If
+ * there are no duplicates of the cursor key in the tree (i.e. B_NODUPS is set
+ * or there simply aren't any duplicates of the key) we copy the key that it
+ * referenced when it's deleted, and reacquire a new cursor key if the cursor
+ * is used again. If there are duplicates keys, we move to the next/previous
+ * key, and set a flag so that we know what happened. NOTE: if duplicate (to
+ * the cursor) keys are added to the tree during this process, it is undefined
+ * if they will be returned or not in a cursor scan.
+ *
+ * The flags determine the possible states of the cursor:
+ *
+ * CURS_INIT The cursor references *something*.
+ * CURS_ACQUIRE The cursor was deleted, and a key has been saved so that
+ * we can reacquire the right position in the tree.
+ * CURS_AFTER, CURS_BEFORE
+ * The cursor was deleted, and now references a key/data pair
+ * that has not yet been returned, either before or after the
+ * deleted key/data pair.
+ * XXX
+ * This structure is broken out so that we can eventually offer multiple
+ * cursors as part of the DB interface.
+ */
+typedef struct _cursor {
+ EPGNO pg; /* B: Saved tree reference. */
+ DBT key; /* B: Saved key, or key.data == NULL. */
+ recno_t rcursor; /* R: recno cursor (1-based) */
+
+#define CURS_ACQUIRE 0x01 /* B: Cursor needs to be reacquired. */
+#define CURS_AFTER 0x02 /* B: Unreturned cursor after key. */
+#define CURS_BEFORE 0x04 /* B: Unreturned cursor before key. */
+#define CURS_INIT 0x08 /* RB: Cursor initialized. */
+ u_int8_t flags;
+} CURSOR;
+
+/*
+ * The metadata of the tree. The nrecs field is used only by the RECNO code.
+ * This is because the btree doesn't really need it and it requires that every
+ * put or delete call modify the metadata.
+ */
+typedef struct _btmeta {
+ u_int32_t magic; /* magic number */
+ u_int32_t version; /* version */
+ u_int32_t psize; /* page size */
+ u_int32_t free; /* page number of first free page */
+ u_int32_t nrecs; /* R: number of records */
+
+#define SAVEMETA (B_NODUPS | R_RECNO)
+ u_int32_t flags; /* bt_flags & SAVEMETA */
+} BTMETA;
+
+/* The in-memory btree/recno data structure. */
+typedef struct _btree {
+ MPOOL *bt_mp; /* memory pool cookie */
+
+ DB *bt_dbp; /* pointer to enclosing DB */
+
+ EPG bt_cur; /* current (pinned) page */
+ PAGE *bt_pinned; /* page pinned across calls */
+
+ CURSOR bt_cursor; /* cursor */
+
+#define BT_PUSH(t, p, i) { \
+ t->bt_sp->pgno = p; \
+ t->bt_sp->index = i; \
+ ++t->bt_sp; \
+}
+#define BT_POP(t) (t->bt_sp == t->bt_stack ? NULL : --t->bt_sp)
+#define BT_CLR(t) (t->bt_sp = t->bt_stack)
+ EPGNO bt_stack[50]; /* stack of parent pages */
+ EPGNO *bt_sp; /* current stack pointer */
+
+ DBT bt_rkey; /* returned key */
+ DBT bt_rdata; /* returned data */
+
+ int bt_fd; /* tree file descriptor */
+
+ pgno_t bt_free; /* next free page */
+ u_int32_t bt_psize; /* page size */
+ indx_t bt_ovflsize; /* cut-off for key/data overflow */
+ int bt_lorder; /* byte order */
+ /* sorted order */
+ enum { NOT, BACK, FORWARD } bt_order;
+ EPGNO bt_last; /* last insert */
+
+ /* B: key comparison function */
+ int (*bt_cmp)(const DBT *, const DBT *);
+ /* B: prefix comparison function */
+ size_t (*bt_pfx)(const DBT *, const DBT *);
+ /* R: recno input function */
+ int (*bt_irec)(struct _btree *, recno_t);
+
+ FILE *bt_rfp; /* R: record FILE pointer */
+ int bt_rfd; /* R: record file descriptor */
+
+ caddr_t bt_cmap; /* R: current point in mapped space */
+ caddr_t bt_smap; /* R: start of mapped space */
+ caddr_t bt_emap; /* R: end of mapped space */
+ size_t bt_msize; /* R: size of mapped region. */
+
+ recno_t bt_nrecs; /* R: number of records */
+ size_t bt_reclen; /* R: fixed record length */
+ u_char bt_bval; /* R: delimiting byte/pad character */
+
+/*
+ * NB:
+ * B_NODUPS and R_RECNO are stored on disk, and may not be changed.
+ */
+#define B_INMEM 0x00001 /* in-memory tree */
+#define B_METADIRTY 0x00002 /* need to write metadata */
+#define B_MODIFIED 0x00004 /* tree modified */
+#define B_NEEDSWAP 0x00008 /* if byte order requires swapping */
+#define B_RDONLY 0x00010 /* read-only tree */
+
+#define B_NODUPS 0x00020 /* no duplicate keys permitted */
+#define R_RECNO 0x00080 /* record oriented tree */
+
+#define R_CLOSEFP 0x00040 /* opened a file pointer */
+#define R_EOF 0x00100 /* end of input file reached. */
+#define R_FIXLEN 0x00200 /* fixed length records */
+#define R_MEMMAPPED 0x00400 /* memory mapped file. */
+#define R_INMEM 0x00800 /* in-memory file */
+#define R_MODIFIED 0x01000 /* modified file */
+#define R_RDONLY 0x02000 /* read-only file */
+
+#define B_DB_LOCK 0x04000 /* DB_LOCK specified. */
+#define B_DB_SHMEM 0x08000 /* DB_SHMEM specified. */
+#define B_DB_TXN 0x10000 /* DB_TXN specified. */
+ u_int32_t flags;
+} BTREE;
+
+#include "extern.h"
diff --git a/freebsd-userspace/lib/libc/db/btree/extern.h b/freebsd-userspace/lib/libc/db/btree/extern.h
new file mode 100644
index 0000000..0abd594
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/btree/extern.h
@@ -0,0 +1,67 @@
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)extern.h 8.10 (Berkeley) 7/20/94
+ * $FreeBSD$
+ */
+
+int __bt_close(DB *);
+int __bt_cmp(BTREE *, const DBT *, EPG *);
+int __bt_crsrdel(BTREE *, EPGNO *);
+int __bt_defcmp(const DBT *, const DBT *);
+size_t __bt_defpfx(const DBT *, const DBT *);
+int __bt_delete(const DB *, const DBT *, u_int);
+int __bt_dleaf(BTREE *, const DBT *, PAGE *, u_int);
+int __bt_fd(const DB *);
+int __bt_free(BTREE *, PAGE *);
+int __bt_get(const DB *, const DBT *, DBT *, u_int);
+PAGE *__bt_new(BTREE *, pgno_t *);
+void __bt_pgin(void *, pgno_t, void *);
+void __bt_pgout(void *, pgno_t, void *);
+int __bt_push(BTREE *, pgno_t, int);
+int __bt_put(const DB *dbp, DBT *, const DBT *, u_int);
+int __bt_ret(BTREE *, EPG *, DBT *, DBT *, DBT *, DBT *, int);
+EPG *__bt_search(BTREE *, const DBT *, int *);
+int __bt_seq(const DB *, DBT *, DBT *, u_int);
+void __bt_setcur(BTREE *, pgno_t, u_int);
+int __bt_split(BTREE *, PAGE *,
+ const DBT *, const DBT *, int, size_t, u_int32_t);
+int __bt_sync(const DB *, u_int);
+
+int __ovfl_delete(BTREE *, void *);
+int __ovfl_get(BTREE *, void *, size_t *, void **, size_t *);
+int __ovfl_put(BTREE *, const DBT *, pgno_t *);
+
+#ifdef DEBUG
+void __bt_dnpage(DB *, pgno_t);
+void __bt_dpage(PAGE *);
+void __bt_dump(DB *);
+#endif
+#ifdef STATISTICS
+void __bt_stat(DB *);
+#endif
diff --git a/freebsd-userspace/lib/libc/db/db/db.c b/freebsd-userspace/lib/libc/db/db/db.c
new file mode 100644
index 0000000..e450c62
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/db/db.c
@@ -0,0 +1,96 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)db.c 8.4 (Berkeley) 2/21/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#include <db.h>
+
+static int __dberr(void);
+
+DB *
+dbopen(const char *fname, int flags, int mode, DBTYPE type, const void *openinfo)
+{
+
+#define DB_FLAGS (DB_LOCK | DB_SHMEM | DB_TXN)
+#define USE_OPEN_FLAGS \
+ (O_CREAT | O_EXCL | O_EXLOCK | O_NOFOLLOW | O_NONBLOCK | \
+ O_RDONLY | O_RDWR | O_SHLOCK | O_SYNC | O_TRUNC)
+
+ if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0)
+ switch (type) {
+ case DB_BTREE:
+ return (__bt_open(fname, flags & USE_OPEN_FLAGS,
+ mode, openinfo, flags & DB_FLAGS));
+ case DB_HASH:
+ return (__hash_open(fname, flags & USE_OPEN_FLAGS,
+ mode, openinfo, flags & DB_FLAGS));
+ case DB_RECNO:
+ return (__rec_open(fname, flags & USE_OPEN_FLAGS,
+ mode, openinfo, flags & DB_FLAGS));
+ }
+ errno = EINVAL;
+ return (NULL);
+}
+
+static int
+__dberr(void)
+{
+ return (RET_ERROR);
+}
+
+/*
+ * __DBPANIC -- Stop.
+ *
+ * Parameters:
+ * dbp: pointer to the DB structure.
+ */
+void
+__dbpanic(DB *dbp)
+{
+ /* The only thing that can succeed is a close. */
+ dbp->del = (int (*)(const struct __db *, const DBT*, u_int))__dberr;
+ dbp->fd = (int (*)(const struct __db *))__dberr;
+ dbp->get = (int (*)(const struct __db *, const DBT*, DBT *, u_int))__dberr;
+ dbp->put = (int (*)(const struct __db *, DBT *, const DBT *, u_int))__dberr;
+ dbp->seq = (int (*)(const struct __db *, DBT *, DBT *, u_int))__dberr;
+ dbp->sync = (int (*)(const struct __db *, u_int))__dberr;
+}
diff --git a/freebsd-userspace/lib/libc/db/mpool/mpool-compat.c b/freebsd-userspace/lib/libc/db/mpool/mpool-compat.c
new file mode 100644
index 0000000..9df76ff
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/mpool/mpool-compat.c
@@ -0,0 +1,43 @@
+/*-
+ * Copyright (c) 2009 Xin LI <delphij at FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <db.h>
+#include <mpool.h>
+
+void *__mpool_new__44bsd(MPOOL *, pgno_t *);
+
+void *
+__mpool_new__44bsd(MPOOL *mp, pgno_t *pgnoaddr)
+{
+
+ return (mpool_new(mp, pgnoaddr, MPOOL_PAGE_NEXT));
+}
+
+__sym_compat(mpool_new, __mpool_new_44bsd, FBSD_1.0);
diff --git a/freebsd-userspace/lib/libc/db/mpool/mpool.c b/freebsd-userspace/lib/libc/db/mpool/mpool.c
new file mode 100644
index 0000000..ee7e143
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/mpool/mpool.c
@@ -0,0 +1,495 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)mpool.c 8.7 (Berkeley) 11/2/95";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include "namespace.h"
+#include <sys/param.h>
+#include <sys/queue.h>
+#include <sys/stat.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "un-namespace.h"
+
+#include <db.h>
+
+#define __MPOOLINTERFACE_PRIVATE
+#include <mpool.h>
+
+static BKT *mpool_bkt(MPOOL *);
+static BKT *mpool_look(MPOOL *, pgno_t);
+static int mpool_write(MPOOL *, BKT *);
+
+/*
+ * mpool_open --
+ * Initialize a memory pool.
+ */
+/* ARGSUSED */
+MPOOL *
+mpool_open(void *key, int fd, pgno_t pagesize, pgno_t maxcache)
+{
+ struct stat sb;
+ MPOOL *mp;
+ int entry;
+
+ /*
+ * Get information about the file.
+ *
+ * XXX
+ * We don't currently handle pipes, although we should.
+ */
+ if (_fstat(fd, &sb))
+ return (NULL);
+ if (!S_ISREG(sb.st_mode)) {
+ errno = ESPIPE;
+ return (NULL);
+ }
+
+ /* Allocate and initialize the MPOOL cookie. */
+ if ((mp = (MPOOL *)calloc(1, sizeof(MPOOL))) == NULL)
+ return (NULL);
+ TAILQ_INIT(&mp->lqh);
+ for (entry = 0; entry < HASHSIZE; ++entry)
+ TAILQ_INIT(&mp->hqh[entry]);
+ mp->maxcache = maxcache;
+ mp->npages = sb.st_size / pagesize;
+ mp->pagesize = pagesize;
+ mp->fd = fd;
+ return (mp);
+}
+
+/*
+ * mpool_filter --
+ * Initialize input/output filters.
+ */
+void
+mpool_filter(MPOOL *mp, void (*pgin) (void *, pgno_t, void *),
+ void (*pgout) (void *, pgno_t, void *), void *pgcookie)
+{
+ mp->pgin = pgin;
+ mp->pgout = pgout;
+ mp->pgcookie = pgcookie;
+}
+
+/*
+ * mpool_new --
+ * Get a new page of memory.
+ */
+void *
+mpool_new(MPOOL *mp, pgno_t *pgnoaddr, u_int flags)
+{
+ struct _hqh *head;
+ BKT *bp;
+
+ if (mp->npages == MAX_PAGE_NUMBER) {
+ (void)fprintf(stderr, "mpool_new: page allocation overflow.\n");
+ abort();
+ }
+#ifdef STATISTICS
+ ++mp->pagenew;
+#endif
+ /*
+ * Get a BKT from the cache. Assign a new page number, attach
+ * it to the head of the hash chain, the tail of the lru chain,
+ * and return.
+ */
+ if ((bp = mpool_bkt(mp)) == NULL)
+ return (NULL);
+ if (flags == MPOOL_PAGE_REQUEST) {
+ mp->npages++;
+ bp->pgno = *pgnoaddr;
+ } else
+ bp->pgno = *pgnoaddr = mp->npages++;
+
+ bp->flags = MPOOL_PINNED | MPOOL_INUSE;
+
+ head = &mp->hqh[HASHKEY(bp->pgno)];
+ TAILQ_INSERT_HEAD(head, bp, hq);
+ TAILQ_INSERT_TAIL(&mp->lqh, bp, q);
+ return (bp->page);
+}
+
+int
+mpool_delete(MPOOL *mp, void *page)
+{
+ struct _hqh *head;
+ BKT *bp;
+
+ bp = (BKT *)((char *)page - sizeof(BKT));
+
+#ifdef DEBUG
+ if (!(bp->flags & MPOOL_PINNED)) {
+ (void)fprintf(stderr,
+ "mpool_delete: page %d not pinned\n", bp->pgno);
+ abort();
+ }
+#endif
+
+ /* Remove from the hash and lru queues. */
+ head = &mp->hqh[HASHKEY(bp->pgno)];
+ TAILQ_REMOVE(head, bp, hq);
+ TAILQ_REMOVE(&mp->lqh, bp, q);
+
+ free(bp);
+ mp->curcache--;
+ return (RET_SUCCESS);
+}
+
+/*
+ * mpool_get
+ * Get a page.
+ */
+/* ARGSUSED */
+void *
+mpool_get(MPOOL *mp, pgno_t pgno,
+ u_int flags) /* XXX not used? */
+{
+ struct _hqh *head;
+ BKT *bp;
+ off_t off;
+ int nr;
+
+#ifdef STATISTICS
+ ++mp->pageget;
+#endif
+
+ /* Check for a page that is cached. */
+ if ((bp = mpool_look(mp, pgno)) != NULL) {
+#ifdef DEBUG
+ if (!(flags & MPOOL_IGNOREPIN) && bp->flags & MPOOL_PINNED) {
+ (void)fprintf(stderr,
+ "mpool_get: page %d already pinned\n", bp->pgno);
+ abort();
+ }
+#endif
+ /*
+ * Move the page to the head of the hash chain and the tail
+ * of the lru chain.
+ */
+ head = &mp->hqh[HASHKEY(bp->pgno)];
+ TAILQ_REMOVE(head, bp, hq);
+ TAILQ_INSERT_HEAD(head, bp, hq);
+ TAILQ_REMOVE(&mp->lqh, bp, q);
+ TAILQ_INSERT_TAIL(&mp->lqh, bp, q);
+
+ /* Return a pinned page. */
+ bp->flags |= MPOOL_PINNED;
+ return (bp->page);
+ }
+
+ /* Get a page from the cache. */
+ if ((bp = mpool_bkt(mp)) == NULL)
+ return (NULL);
+
+ /* Read in the contents. */
+ off = mp->pagesize * pgno;
+ if ((nr = pread(mp->fd, bp->page, mp->pagesize, off)) != (ssize_t)mp->pagesize) {
+ switch (nr) {
+ case -1:
+ /* errno is set for us by pread(). */
+ free(bp);
+ mp->curcache--;
+ return (NULL);
+ case 0:
+ /*
+ * A zero-length read means you need to create a
+ * new page.
+ */
+ memset(bp->page, 0, mp->pagesize);
+ break;
+ default:
+ /* A partial read is definitely bad. */
+ free(bp);
+ mp->curcache--;
+ errno = EINVAL;
+ return (NULL);
+ }
+ }
+#ifdef STATISTICS
+ ++mp->pageread;
+#endif
+
+ /* Set the page number, pin the page. */
+ bp->pgno = pgno;
+ if (!(flags & MPOOL_IGNOREPIN))
+ bp->flags = MPOOL_PINNED;
+ bp->flags |= MPOOL_INUSE;
+
+ /*
+ * Add the page to the head of the hash chain and the tail
+ * of the lru chain.
+ */
+ head = &mp->hqh[HASHKEY(bp->pgno)];
+ TAILQ_INSERT_HEAD(head, bp, hq);
+ TAILQ_INSERT_TAIL(&mp->lqh, bp, q);
+
+ /* Run through the user's filter. */
+ if (mp->pgin != NULL)
+ (mp->pgin)(mp->pgcookie, bp->pgno, bp->page);
+
+ return (bp->page);
+}
+
+/*
+ * mpool_put
+ * Return a page.
+ */
+/* ARGSUSED */
+int
+mpool_put(MPOOL *mp, void *page, u_int flags)
+{
+ BKT *bp;
+
+#ifdef STATISTICS
+ ++mp->pageput;
+#endif
+ bp = (BKT *)((char *)page - sizeof(BKT));
+#ifdef DEBUG
+ if (!(bp->flags & MPOOL_PINNED)) {
+ (void)fprintf(stderr,
+ "mpool_put: page %d not pinned\n", bp->pgno);
+ abort();
+ }
+#endif
+ bp->flags &= ~MPOOL_PINNED;
+ if (flags & MPOOL_DIRTY)
+ bp->flags |= flags & MPOOL_DIRTY;
+ return (RET_SUCCESS);
+}
+
+/*
+ * mpool_close
+ * Close the buffer pool.
+ */
+int
+mpool_close(MPOOL *mp)
+{
+ BKT *bp;
+
+ /* Free up any space allocated to the lru pages. */
+ while (!TAILQ_EMPTY(&mp->lqh)) {
+ bp = TAILQ_FIRST(&mp->lqh);
+ TAILQ_REMOVE(&mp->lqh, bp, q);
+ free(bp);
+ }
+
+ /* Free the MPOOL cookie. */
+ free(mp);
+ return (RET_SUCCESS);
+}
+
+/*
+ * mpool_sync
+ * Sync the pool to disk.
+ */
+int
+mpool_sync(MPOOL *mp)
+{
+ BKT *bp;
+
+ /* Walk the lru chain, flushing any dirty pages to disk. */
+ TAILQ_FOREACH(bp, &mp->lqh, q)
+ if (bp->flags & MPOOL_DIRTY &&
+ mpool_write(mp, bp) == RET_ERROR)
+ return (RET_ERROR);
+
+ /* Sync the file descriptor. */
+ return (_fsync(mp->fd) ? RET_ERROR : RET_SUCCESS);
+}
+
+/*
+ * mpool_bkt
+ * Get a page from the cache (or create one).
+ */
+static BKT *
+mpool_bkt(MPOOL *mp)
+{
+ struct _hqh *head;
+ BKT *bp;
+
+ /* If under the max cached, always create a new page. */
+ if (mp->curcache < mp->maxcache)
+ goto new;
+
+ /*
+ * If the cache is max'd out, walk the lru list for a buffer we
+ * can flush. If we find one, write it (if necessary) and take it
+ * off any lists. If we don't find anything we grow the cache anyway.
+ * The cache never shrinks.
+ */
+ TAILQ_FOREACH(bp, &mp->lqh, q)
+ if (!(bp->flags & MPOOL_PINNED)) {
+ /* Flush if dirty. */
+ if (bp->flags & MPOOL_DIRTY &&
+ mpool_write(mp, bp) == RET_ERROR)
+ return (NULL);
+#ifdef STATISTICS
+ ++mp->pageflush;
+#endif
+ /* Remove from the hash and lru queues. */
+ head = &mp->hqh[HASHKEY(bp->pgno)];
+ TAILQ_REMOVE(head, bp, hq);
+ TAILQ_REMOVE(&mp->lqh, bp, q);
+#ifdef DEBUG
+ { void *spage;
+ spage = bp->page;
+ memset(bp, 0xff, sizeof(BKT) + mp->pagesize);
+ bp->page = spage;
+ }
+#endif
+ bp->flags = 0;
+ return (bp);
+ }
+
+new: if ((bp = (BKT *)calloc(1, sizeof(BKT) + mp->pagesize)) == NULL)
+ return (NULL);
+#ifdef STATISTICS
+ ++mp->pagealloc;
+#endif
+ bp->page = (char *)bp + sizeof(BKT);
+ bp->flags = 0;
+ ++mp->curcache;
+ return (bp);
+}
+
+/*
+ * mpool_write
+ * Write a page to disk.
+ */
+static int
+mpool_write(MPOOL *mp, BKT *bp)
+{
+ off_t off;
+
+#ifdef STATISTICS
+ ++mp->pagewrite;
+#endif
+
+ /* Run through the user's filter. */
+ if (mp->pgout)
+ (mp->pgout)(mp->pgcookie, bp->pgno, bp->page);
+
+ off = mp->pagesize * bp->pgno;
+ if (pwrite(mp->fd, bp->page, mp->pagesize, off) != (ssize_t)mp->pagesize)
+ return (RET_ERROR);
+
+ /*
+ * Re-run through the input filter since this page may soon be
+ * accessed via the cache, and whatever the user's output filter
+ * did may screw things up if we don't let the input filter
+ * restore the in-core copy.
+ */
+ if (mp->pgin)
+ (mp->pgin)(mp->pgcookie, bp->pgno, bp->page);
+
+ bp->flags &= ~MPOOL_DIRTY;
+ return (RET_SUCCESS);
+}
+
+/*
+ * mpool_look
+ * Lookup a page in the cache.
+ */
+static BKT *
+mpool_look(MPOOL *mp, pgno_t pgno)
+{
+ struct _hqh *head;
+ BKT *bp;
+
+ head = &mp->hqh[HASHKEY(pgno)];
+ TAILQ_FOREACH(bp, head, hq)
+ if ((bp->pgno == pgno) &&
+ ((bp->flags & MPOOL_INUSE) == MPOOL_INUSE)) {
+#ifdef STATISTICS
+ ++mp->cachehit;
+#endif
+ return (bp);
+ }
+#ifdef STATISTICS
+ ++mp->cachemiss;
+#endif
+ return (NULL);
+}
+
+#ifdef STATISTICS
+/*
+ * mpool_stat
+ * Print out cache statistics.
+ */
+void
+mpool_stat(MPOOL *mp)
+{
+ BKT *bp;
+ int cnt;
+ char *sep;
+
+ (void)fprintf(stderr, "%lu pages in the file\n", mp->npages);
+ (void)fprintf(stderr,
+ "page size %lu, cacheing %lu pages of %lu page max cache\n",
+ mp->pagesize, mp->curcache, mp->maxcache);
+ (void)fprintf(stderr, "%lu page puts, %lu page gets, %lu page new\n",
+ mp->pageput, mp->pageget, mp->pagenew);
+ (void)fprintf(stderr, "%lu page allocs, %lu page flushes\n",
+ mp->pagealloc, mp->pageflush);
+ if (mp->cachehit + mp->cachemiss)
+ (void)fprintf(stderr,
+ "%.0f%% cache hit rate (%lu hits, %lu misses)\n",
+ ((double)mp->cachehit / (mp->cachehit + mp->cachemiss))
+ * 100, mp->cachehit, mp->cachemiss);
+ (void)fprintf(stderr, "%lu page reads, %lu page writes\n",
+ mp->pageread, mp->pagewrite);
+
+ sep = "";
+ cnt = 0;
+ TAILQ_FOREACH(bp, &mp->lqh, q) {
+ (void)fprintf(stderr, "%s%d", sep, bp->pgno);
+ if (bp->flags & MPOOL_DIRTY)
+ (void)fprintf(stderr, "d");
+ if (bp->flags & MPOOL_PINNED)
+ (void)fprintf(stderr, "P");
+ if (++cnt == 10) {
+ sep = "\n";
+ cnt = 0;
+ } else
+ sep = ", ";
+
+ }
+ (void)fprintf(stderr, "\n");
+}
+#endif
diff --git a/freebsd-userspace/lib/libc/db/recno/extern.h b/freebsd-userspace/lib/libc/db/recno/extern.h
new file mode 100644
index 0000000..53916bd
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/recno/extern.h
@@ -0,0 +1,51 @@
+/*-
+ * Copyright (c) 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)extern.h 8.3 (Berkeley) 6/4/94
+ * $FreeBSD$
+ */
+
+#include "../btree/extern.h"
+
+int __rec_close(DB *);
+int __rec_delete(const DB *, const DBT *, u_int);
+int __rec_dleaf(BTREE *, PAGE *, u_int32_t);
+int __rec_fd(const DB *);
+int __rec_fmap(BTREE *, recno_t);
+int __rec_fout(BTREE *);
+int __rec_fpipe(BTREE *, recno_t);
+int __rec_get(const DB *, const DBT *, DBT *, u_int);
+int __rec_iput(BTREE *, recno_t, const DBT *, u_int);
+int __rec_put(const DB *dbp, DBT *, const DBT *, u_int);
+int __rec_ret(BTREE *, EPG *, recno_t, DBT *, DBT *);
+EPG *__rec_search(BTREE *, recno_t, enum SRCHOP);
+int __rec_seq(const DB *, DBT *, DBT *, u_int);
+int __rec_sync(const DB *, u_int);
+int __rec_vmap(BTREE *, recno_t);
+int __rec_vout(BTREE *);
+int __rec_vpipe(BTREE *, recno_t);
diff --git a/freebsd-userspace/lib/libc/db/recno/rec_close.c b/freebsd-userspace/lib/libc/db/recno/rec_close.c
new file mode 100644
index 0000000..2a78d2d
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/recno/rec_close.c
@@ -0,0 +1,184 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rec_close.c 8.6 (Berkeley) 8/18/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include "namespace.h"
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <sys/mman.h>
+
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <unistd.h>
+#include "un-namespace.h"
+
+#include <db.h>
+#include "recno.h"
+
+/*
+ * __REC_CLOSE -- Close a recno tree.
+ *
+ * Parameters:
+ * dbp: pointer to access method
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS
+ */
+int
+__rec_close(DB *dbp)
+{
+ BTREE *t;
+ int status;
+
+ t = dbp->internal;
+
+ /* Toss any page pinned across calls. */
+ if (t->bt_pinned != NULL) {
+ mpool_put(t->bt_mp, t->bt_pinned, 0);
+ t->bt_pinned = NULL;
+ }
+
+ if (__rec_sync(dbp, 0) == RET_ERROR)
+ return (RET_ERROR);
+
+ /* Committed to closing. */
+ status = RET_SUCCESS;
+ if (F_ISSET(t, R_MEMMAPPED) && munmap(t->bt_smap, t->bt_msize))
+ status = RET_ERROR;
+
+ if (!F_ISSET(t, R_INMEM)) {
+ if (F_ISSET(t, R_CLOSEFP)) {
+ if (fclose(t->bt_rfp))
+ status = RET_ERROR;
+ } else {
+ if (_close(t->bt_rfd))
+ status = RET_ERROR;
+ }
+ }
+
+ if (__bt_close(dbp) == RET_ERROR)
+ status = RET_ERROR;
+
+ return (status);
+}
+
+/*
+ * __REC_SYNC -- sync the recno tree to disk.
+ *
+ * Parameters:
+ * dbp: pointer to access method
+ *
+ * Returns:
+ * RET_SUCCESS, RET_ERROR.
+ */
+int
+__rec_sync(const DB *dbp, u_int flags)
+{
+ struct iovec iov[2];
+ BTREE *t;
+ DBT data, key;
+ off_t off;
+ recno_t scursor, trec;
+ int status;
+
+ t = dbp->internal;
+
+ /* Toss any page pinned across calls. */
+ if (t->bt_pinned != NULL) {
+ mpool_put(t->bt_mp, t->bt_pinned, 0);
+ t->bt_pinned = NULL;
+ }
+
+ if (flags == R_RECNOSYNC)
+ return (__bt_sync(dbp, 0));
+
+ if (F_ISSET(t, R_RDONLY | R_INMEM) || !F_ISSET(t, R_MODIFIED))
+ return (RET_SUCCESS);
+
+ /* Read any remaining records into the tree. */
+ if (!F_ISSET(t, R_EOF) && t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR)
+ return (RET_ERROR);
+
+ /* Rewind the file descriptor. */
+ if (lseek(t->bt_rfd, (off_t)0, SEEK_SET) != 0)
+ return (RET_ERROR);
+
+ /* Save the cursor. */
+ scursor = t->bt_cursor.rcursor;
+
+ key.size = sizeof(recno_t);
+ key.data = &trec;
+
+ if (F_ISSET(t, R_FIXLEN)) {
+ /*
+ * We assume that fixed length records are all fixed length.
+ * Any that aren't are either EINVAL'd or corrected by the
+ * record put code.
+ */
+ status = (dbp->seq)(dbp, &key, &data, R_FIRST);
+ while (status == RET_SUCCESS) {
+ if (_write(t->bt_rfd, data.data, data.size) !=
+ (ssize_t)data.size)
+ return (RET_ERROR);
+ status = (dbp->seq)(dbp, &key, &data, R_NEXT);
+ }
+ } else {
+ iov[1].iov_base = &t->bt_bval;
+ iov[1].iov_len = 1;
+
+ status = (dbp->seq)(dbp, &key, &data, R_FIRST);
+ while (status == RET_SUCCESS) {
+ iov[0].iov_base = data.data;
+ iov[0].iov_len = data.size;
+ if (_writev(t->bt_rfd, iov, 2) != (ssize_t)(data.size + 1))
+ return (RET_ERROR);
+ status = (dbp->seq)(dbp, &key, &data, R_NEXT);
+ }
+ }
+
+ /* Restore the cursor. */
+ t->bt_cursor.rcursor = scursor;
+
+ if (status == RET_ERROR)
+ return (RET_ERROR);
+ if ((off = lseek(t->bt_rfd, (off_t)0, SEEK_CUR)) == -1)
+ return (RET_ERROR);
+ if (ftruncate(t->bt_rfd, off))
+ return (RET_ERROR);
+ F_CLR(t, R_MODIFIED);
+ return (RET_SUCCESS);
+}
diff --git a/freebsd-userspace/lib/libc/db/recno/rec_delete.c b/freebsd-userspace/lib/libc/db/recno/rec_delete.c
new file mode 100644
index 0000000..ffaa50b
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/recno/rec_delete.c
@@ -0,0 +1,189 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rec_delete.c 8.7 (Berkeley) 7/14/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <db.h>
+#include "recno.h"
+
+static int rec_rdelete(BTREE *, recno_t);
+
+/*
+ * __REC_DELETE -- Delete the item(s) referenced by a key.
+ *
+ * Parameters:
+ * dbp: pointer to access method
+ * key: key to delete
+ * flags: R_CURSOR if deleting what the cursor references
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key not found.
+ */
+int
+__rec_delete(const DB *dbp, const DBT *key, u_int flags)
+{
+ BTREE *t;
+ recno_t nrec;
+ int status;
+
+ t = dbp->internal;
+
+ /* Toss any page pinned across calls. */
+ if (t->bt_pinned != NULL) {
+ mpool_put(t->bt_mp, t->bt_pinned, 0);
+ t->bt_pinned = NULL;
+ }
+
+ switch(flags) {
+ case 0:
+ if ((nrec = *(recno_t *)key->data) == 0)
+ goto einval;
+ if (nrec > t->bt_nrecs)
+ return (RET_SPECIAL);
+ --nrec;
+ status = rec_rdelete(t, nrec);
+ break;
+ case R_CURSOR:
+ if (!F_ISSET(&t->bt_cursor, CURS_INIT))
+ goto einval;
+ if (t->bt_nrecs == 0)
+ return (RET_SPECIAL);
+ status = rec_rdelete(t, t->bt_cursor.rcursor - 1);
+ if (status == RET_SUCCESS)
+ --t->bt_cursor.rcursor;
+ break;
+ default:
+einval: errno = EINVAL;
+ return (RET_ERROR);
+ }
+
+ if (status == RET_SUCCESS)
+ F_SET(t, B_MODIFIED | R_MODIFIED);
+ return (status);
+}
+
+/*
+ * REC_RDELETE -- Delete the data matching the specified key.
+ *
+ * Parameters:
+ * tree: tree
+ * nrec: record to delete
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key not found.
+ */
+static int
+rec_rdelete(BTREE *t, recno_t nrec)
+{
+ EPG *e;
+ PAGE *h;
+ int status;
+
+ /* Find the record; __rec_search pins the page. */
+ if ((e = __rec_search(t, nrec, SDELETE)) == NULL)
+ return (RET_ERROR);
+
+ /* Delete the record. */
+ h = e->page;
+ status = __rec_dleaf(t, h, e->index);
+ if (status != RET_SUCCESS) {
+ mpool_put(t->bt_mp, h, 0);
+ return (status);
+ }
+ mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+ return (RET_SUCCESS);
+}
+
+/*
+ * __REC_DLEAF -- Delete a single record from a recno leaf page.
+ *
+ * Parameters:
+ * t: tree
+ * idx: index on current page to delete
+ *
+ * Returns:
+ * RET_SUCCESS, RET_ERROR.
+ */
+int
+__rec_dleaf(BTREE *t, PAGE *h, u_int32_t idx)
+{
+ RLEAF *rl;
+ indx_t *ip, cnt, offset;
+ u_int32_t nbytes;
+ char *from;
+ void *to;
+
+ /*
+ * Delete a record from a recno leaf page. Internal records are never
+ * deleted from internal pages, regardless of the records that caused
+ * them to be added being deleted. Pages made empty by deletion are
+ * not reclaimed. They are, however, made available for reuse.
+ *
+ * Pack the remaining entries at the end of the page, shift the indices
+ * down, overwriting the deleted record and its index. If the record
+ * uses overflow pages, make them available for reuse.
+ */
+ to = rl = GETRLEAF(h, idx);
+ if (rl->flags & P_BIGDATA && __ovfl_delete(t, rl->bytes) == RET_ERROR)
+ return (RET_ERROR);
+ nbytes = NRLEAF(rl);
+
+ /*
+ * Compress the key/data pairs. Compress and adjust the [BR]LEAF
+ * offsets. Reset the headers.
+ */
+ from = (char *)h + h->upper;
+ memmove(from + nbytes, from, (char *)to - from);
+ h->upper += nbytes;
+
+ offset = h->linp[idx];
+ for (cnt = &h->linp[idx] - (ip = &h->linp[0]); cnt--; ++ip)
+ if (ip[0] < offset)
+ ip[0] += nbytes;
+ for (cnt = &h->linp[NEXTINDEX(h)] - ip; --cnt; ++ip)
+ ip[0] = ip[1] < offset ? ip[1] + nbytes : ip[1];
+ h->lower -= sizeof(indx_t);
+ --t->bt_nrecs;
+ return (RET_SUCCESS);
+}
diff --git a/freebsd-userspace/lib/libc/db/recno/rec_get.c b/freebsd-userspace/lib/libc/db/recno/rec_get.c
new file mode 100644
index 0000000..ef749ad
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/recno/rec_get.c
@@ -0,0 +1,293 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rec_get.c 8.9 (Berkeley) 8/18/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <db.h>
+#include "recno.h"
+
+/*
+ * __REC_GET -- Get a record from the btree.
+ *
+ * Parameters:
+ * dbp: pointer to access method
+ * key: key to find
+ * data: data to return
+ * flag: currently unused
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key not found.
+ */
+int
+__rec_get(const DB *dbp, const DBT *key, DBT *data, u_int flags)
+{
+ BTREE *t;
+ EPG *e;
+ recno_t nrec;
+ int status;
+
+ t = dbp->internal;
+
+ /* Toss any page pinned across calls. */
+ if (t->bt_pinned != NULL) {
+ mpool_put(t->bt_mp, t->bt_pinned, 0);
+ t->bt_pinned = NULL;
+ }
+
+ /* Get currently doesn't take any flags, and keys of 0 are illegal. */
+ if (flags || (nrec = *(recno_t *)key->data) == 0) {
+ errno = EINVAL;
+ return (RET_ERROR);
+ }
+
+ /*
+ * If we haven't seen this record yet, try to find it in the
+ * original file.
+ */
+ if (nrec > t->bt_nrecs) {
+ if (F_ISSET(t, R_EOF | R_INMEM))
+ return (RET_SPECIAL);
+ if ((status = t->bt_irec(t, nrec)) != RET_SUCCESS)
+ return (status);
+ }
+
+ --nrec;
+ if ((e = __rec_search(t, nrec, SEARCH)) == NULL)
+ return (RET_ERROR);
+
+ status = __rec_ret(t, e, 0, NULL, data);
+ if (F_ISSET(t, B_DB_LOCK))
+ mpool_put(t->bt_mp, e->page, 0);
+ else
+ t->bt_pinned = e->page;
+ return (status);
+}
+
+/*
+ * __REC_FPIPE -- Get fixed length records from a pipe.
+ *
+ * Parameters:
+ * t: tree
+ * cnt: records to read
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS
+ */
+int
+__rec_fpipe(BTREE *t, recno_t top)
+{
+ DBT data;
+ recno_t nrec;
+ size_t len;
+ int ch;
+ u_char *p;
+
+ if (t->bt_rdata.size < t->bt_reclen) {
+ t->bt_rdata.data = reallocf(t->bt_rdata.data, t->bt_reclen);
+ if (t->bt_rdata.data == NULL)
+ return (RET_ERROR);
+ t->bt_rdata.size = t->bt_reclen;
+ }
+ data.data = t->bt_rdata.data;
+ data.size = t->bt_reclen;
+
+ for (nrec = t->bt_nrecs; nrec < top;) {
+ len = t->bt_reclen;
+ for (p = t->bt_rdata.data;; *p++ = ch)
+ if ((ch = getc(t->bt_rfp)) == EOF || !--len) {
+ if (ch != EOF)
+ *p = ch;
+ if (len != 0)
+ memset(p, t->bt_bval, len);
+ if (__rec_iput(t,
+ nrec, &data, 0) != RET_SUCCESS)
+ return (RET_ERROR);
+ ++nrec;
+ break;
+ }
+ if (ch == EOF)
+ break;
+ }
+ if (nrec < top) {
+ F_SET(t, R_EOF);
+ return (RET_SPECIAL);
+ }
+ return (RET_SUCCESS);
+}
+
+/*
+ * __REC_VPIPE -- Get variable length records from a pipe.
+ *
+ * Parameters:
+ * t: tree
+ * cnt: records to read
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS
+ */
+int
+__rec_vpipe(BTREE *t, recno_t top)
+{
+ DBT data;
+ recno_t nrec;
+ size_t len;
+ size_t sz;
+ int bval, ch;
+ u_char *p;
+
+ bval = t->bt_bval;
+ for (nrec = t->bt_nrecs; nrec < top; ++nrec) {
+ for (p = t->bt_rdata.data,
+ sz = t->bt_rdata.size;; *p++ = ch, --sz) {
+ if ((ch = getc(t->bt_rfp)) == EOF || ch == bval) {
+ data.data = t->bt_rdata.data;
+ data.size = p - (u_char *)t->bt_rdata.data;
+ if (ch == EOF && data.size == 0)
+ break;
+ if (__rec_iput(t, nrec, &data, 0)
+ != RET_SUCCESS)
+ return (RET_ERROR);
+ break;
+ }
+ if (sz == 0) {
+ len = p - (u_char *)t->bt_rdata.data;
+ t->bt_rdata.size += (sz = 256);
+ t->bt_rdata.data = reallocf(t->bt_rdata.data, t->bt_rdata.size);
+ if (t->bt_rdata.data == NULL)
+ return (RET_ERROR);
+ p = (u_char *)t->bt_rdata.data + len;
+ }
+ }
+ if (ch == EOF)
+ break;
+ }
+ if (nrec < top) {
+ F_SET(t, R_EOF);
+ return (RET_SPECIAL);
+ }
+ return (RET_SUCCESS);
+}
+
+/*
+ * __REC_FMAP -- Get fixed length records from a file.
+ *
+ * Parameters:
+ * t: tree
+ * cnt: records to read
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS
+ */
+int
+__rec_fmap(BTREE *t, recno_t top)
+{
+ DBT data;
+ recno_t nrec;
+ u_char *sp, *ep, *p;
+ size_t len;
+
+ if (t->bt_rdata.size < t->bt_reclen) {
+ t->bt_rdata.data = reallocf(t->bt_rdata.data, t->bt_reclen);
+ if (t->bt_rdata.data == NULL)
+ return (RET_ERROR);
+ t->bt_rdata.size = t->bt_reclen;
+ }
+ data.data = t->bt_rdata.data;
+ data.size = t->bt_reclen;
+
+ sp = (u_char *)t->bt_cmap;
+ ep = (u_char *)t->bt_emap;
+ for (nrec = t->bt_nrecs; nrec < top; ++nrec) {
+ if (sp >= ep) {
+ F_SET(t, R_EOF);
+ return (RET_SPECIAL);
+ }
+ len = t->bt_reclen;
+ for (p = t->bt_rdata.data;
+ sp < ep && len > 0; *p++ = *sp++, --len);
+ if (len != 0)
+ memset(p, t->bt_bval, len);
+ if (__rec_iput(t, nrec, &data, 0) != RET_SUCCESS)
+ return (RET_ERROR);
+ }
+ t->bt_cmap = (caddr_t)sp;
+ return (RET_SUCCESS);
+}
+
+/*
+ * __REC_VMAP -- Get variable length records from a file.
+ *
+ * Parameters:
+ * t: tree
+ * cnt: records to read
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS
+ */
+int
+__rec_vmap(BTREE *t, recno_t top)
+{
+ DBT data;
+ u_char *sp, *ep;
+ recno_t nrec;
+ int bval;
+
+ sp = (u_char *)t->bt_cmap;
+ ep = (u_char *)t->bt_emap;
+ bval = t->bt_bval;
+
+ for (nrec = t->bt_nrecs; nrec < top; ++nrec) {
+ if (sp >= ep) {
+ F_SET(t, R_EOF);
+ return (RET_SPECIAL);
+ }
+ for (data.data = sp; sp < ep && *sp != bval; ++sp);
+ data.size = sp - (u_char *)data.data;
+ if (__rec_iput(t, nrec, &data, 0) != RET_SUCCESS)
+ return (RET_ERROR);
+ ++sp;
+ }
+ t->bt_cmap = (caddr_t)sp;
+ return (RET_SUCCESS);
+}
diff --git a/freebsd-userspace/lib/libc/db/recno/rec_open.c b/freebsd-userspace/lib/libc/db/recno/rec_open.c
new file mode 100644
index 0000000..a0248ac
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/recno/rec_open.c
@@ -0,0 +1,240 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Olson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rec_open.c 8.10 (Berkeley) 9/1/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include "namespace.h"
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <unistd.h>
+#include "un-namespace.h"
+
+#include <db.h>
+#include "recno.h"
+
+DB *
+__rec_open(const char *fname, int flags, int mode, const RECNOINFO *openinfo,
+ int dflags)
+{
+ BTREE *t;
+ BTREEINFO btopeninfo;
+ DB *dbp;
+ PAGE *h;
+ struct stat sb;
+ int rfd, sverrno;
+
+ /* Open the user's file -- if this fails, we're done. */
+ if (fname != NULL && (rfd = _open(fname, flags, mode)) < 0)
+ return (NULL);
+
+ /* Create a btree in memory (backed by disk). */
+ dbp = NULL;
+ if (openinfo) {
+ if (openinfo->flags & ~(R_FIXEDLEN | R_NOKEY | R_SNAPSHOT))
+ goto einval;
+ btopeninfo.flags = 0;
+ btopeninfo.cachesize = openinfo->cachesize;
+ btopeninfo.maxkeypage = 0;
+ btopeninfo.minkeypage = 0;
+ btopeninfo.psize = openinfo->psize;
+ btopeninfo.compare = NULL;
+ btopeninfo.prefix = NULL;
+ btopeninfo.lorder = openinfo->lorder;
+ dbp = __bt_open(openinfo->bfname,
+ O_RDWR, S_IRUSR | S_IWUSR, &btopeninfo, dflags);
+ } else
+ dbp = __bt_open(NULL, O_RDWR, S_IRUSR | S_IWUSR, NULL, dflags);
+ if (dbp == NULL)
+ goto err;
+
+ /*
+ * Some fields in the tree structure are recno specific. Fill them
+ * in and make the btree structure look like a recno structure. We
+ * don't change the bt_ovflsize value, it's close enough and slightly
+ * bigger.
+ */
+ t = dbp->internal;
+ if (openinfo) {
+ if (openinfo->flags & R_FIXEDLEN) {
+ F_SET(t, R_FIXLEN);
+ t->bt_reclen = openinfo->reclen;
+ if (t->bt_reclen == 0)
+ goto einval;
+ }
+ t->bt_bval = openinfo->bval;
+ } else
+ t->bt_bval = '\n';
+
+ F_SET(t, R_RECNO);
+ if (fname == NULL)
+ F_SET(t, R_EOF | R_INMEM);
+ else
+ t->bt_rfd = rfd;
+
+ if (fname != NULL) {
+ /*
+ * In 4.4BSD, stat(2) returns true for ISSOCK on pipes.
+ * Unfortunately, that's not portable, so we use lseek
+ * and check the errno values.
+ */
+ errno = 0;
+ if (lseek(rfd, (off_t)0, SEEK_CUR) == -1 && errno == ESPIPE) {
+ switch (flags & O_ACCMODE) {
+ case O_RDONLY:
+ F_SET(t, R_RDONLY);
+ break;
+ default:
+ goto einval;
+ }
+slow: if ((t->bt_rfp = fdopen(rfd, "r")) == NULL)
+ goto err;
+ F_SET(t, R_CLOSEFP);
+ t->bt_irec =
+ F_ISSET(t, R_FIXLEN) ? __rec_fpipe : __rec_vpipe;
+ } else {
+ switch (flags & O_ACCMODE) {
+ case O_RDONLY:
+ F_SET(t, R_RDONLY);
+ break;
+ case O_RDWR:
+ break;
+ default:
+ goto einval;
+ }
+
+ if (_fstat(rfd, &sb))
+ goto err;
+ /*
+ * Kluge -- we'd like to test to see if the file is too
+ * big to mmap. Since, we don't know what size or type
+ * off_t's or size_t's are, what the largest unsigned
+ * integral type is, or what random insanity the local
+ * C compiler will perpetrate, doing the comparison in
+ * a portable way is flatly impossible. Hope that mmap
+ * fails if the file is too large.
+ */
+ if (sb.st_size == 0)
+ F_SET(t, R_EOF);
+ else {
+#ifdef MMAP_NOT_AVAILABLE
+ /*
+ * XXX
+ * Mmap doesn't work correctly on many current
+ * systems. In particular, it can fail subtly,
+ * with cache coherency problems. Don't use it
+ * for now.
+ */
+ t->bt_msize = sb.st_size;
+ if ((t->bt_smap = mmap(NULL, t->bt_msize,
+ PROT_READ, MAP_PRIVATE, rfd,
+ (off_t)0)) == MAP_FAILED)
+ goto slow;
+ t->bt_cmap = t->bt_smap;
+ t->bt_emap = t->bt_smap + sb.st_size;
+ t->bt_irec = F_ISSET(t, R_FIXLEN) ?
+ __rec_fmap : __rec_vmap;
+ F_SET(t, R_MEMMAPPED);
+#else
+ goto slow;
+#endif
+ }
+ }
+ }
+
+ /* Use the recno routines. */
+ dbp->close = __rec_close;
+ dbp->del = __rec_delete;
+ dbp->fd = __rec_fd;
+ dbp->get = __rec_get;
+ dbp->put = __rec_put;
+ dbp->seq = __rec_seq;
+ dbp->sync = __rec_sync;
+
+ /* If the root page was created, reset the flags. */
+ if ((h = mpool_get(t->bt_mp, P_ROOT, 0)) == NULL)
+ goto err;
+ if ((h->flags & P_TYPE) == P_BLEAF) {
+ F_CLR(h, P_TYPE);
+ F_SET(h, P_RLEAF);
+ mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+ } else
+ mpool_put(t->bt_mp, h, 0);
+
+ if (openinfo && openinfo->flags & R_SNAPSHOT &&
+ !F_ISSET(t, R_EOF | R_INMEM) &&
+ t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR)
+ goto err;
+ return (dbp);
+
+einval: errno = EINVAL;
+err: sverrno = errno;
+ if (dbp != NULL)
+ (void)__bt_close(dbp);
+ if (fname != NULL)
+ (void)_close(rfd);
+ errno = sverrno;
+ return (NULL);
+}
+
+int
+__rec_fd(const DB *dbp)
+{
+ BTREE *t;
+
+ t = dbp->internal;
+
+ /* Toss any page pinned across calls. */
+ if (t->bt_pinned != NULL) {
+ mpool_put(t->bt_mp, t->bt_pinned, 0);
+ t->bt_pinned = NULL;
+ }
+
+ /* In-memory database can't have a file descriptor. */
+ if (F_ISSET(t, R_INMEM)) {
+ errno = ENOENT;
+ return (-1);
+ }
+ return (t->bt_rfd);
+}
diff --git a/freebsd-userspace/lib/libc/db/recno/rec_put.c b/freebsd-userspace/lib/libc/db/recno/rec_put.c
new file mode 100644
index 0000000..58c1f56
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/recno/rec_put.c
@@ -0,0 +1,277 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rec_put.c 8.7 (Berkeley) 8/18/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <db.h>
+#include "recno.h"
+
+/*
+ * __REC_PUT -- Add a recno item to the tree.
+ *
+ * Parameters:
+ * dbp: pointer to access method
+ * key: key
+ * data: data
+ * flag: R_CURSOR, R_IAFTER, R_IBEFORE, R_NOOVERWRITE
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key is
+ * already in the tree and R_NOOVERWRITE specified.
+ */
+int
+__rec_put(const DB *dbp, DBT *key, const DBT *data, u_int flags)
+{
+ BTREE *t;
+ DBT fdata, tdata;
+ recno_t nrec;
+ int status;
+
+ t = dbp->internal;
+
+ /* Toss any page pinned across calls. */
+ if (t->bt_pinned != NULL) {
+ mpool_put(t->bt_mp, t->bt_pinned, 0);
+ t->bt_pinned = NULL;
+ }
+
+ /*
+ * If using fixed-length records, and the record is long, return
+ * EINVAL. If it's short, pad it out. Use the record data return
+ * memory, it's only short-term.
+ */
+ if (F_ISSET(t, R_FIXLEN) && data->size != t->bt_reclen) {
+ if (data->size > t->bt_reclen)
+ goto einval;
+
+ if (t->bt_rdata.size < t->bt_reclen) {
+ t->bt_rdata.data =
+ reallocf(t->bt_rdata.data, t->bt_reclen);
+ if (t->bt_rdata.data == NULL)
+ return (RET_ERROR);
+ t->bt_rdata.size = t->bt_reclen;
+ }
+ memmove(t->bt_rdata.data, data->data, data->size);
+ memset((char *)t->bt_rdata.data + data->size,
+ t->bt_bval, t->bt_reclen - data->size);
+ fdata.data = t->bt_rdata.data;
+ fdata.size = t->bt_reclen;
+ } else {
+ fdata.data = data->data;
+ fdata.size = data->size;
+ }
+
+ switch (flags) {
+ case R_CURSOR:
+ if (!F_ISSET(&t->bt_cursor, CURS_INIT))
+ goto einval;
+ nrec = t->bt_cursor.rcursor;
+ break;
+ case R_SETCURSOR:
+ if ((nrec = *(recno_t *)key->data) == 0)
+ goto einval;
+ break;
+ case R_IAFTER:
+ if ((nrec = *(recno_t *)key->data) == 0) {
+ nrec = 1;
+ flags = R_IBEFORE;
+ }
+ break;
+ case 0:
+ case R_IBEFORE:
+ if ((nrec = *(recno_t *)key->data) == 0)
+ goto einval;
+ break;
+ case R_NOOVERWRITE:
+ if ((nrec = *(recno_t *)key->data) == 0)
+ goto einval;
+ if (nrec <= t->bt_nrecs)
+ return (RET_SPECIAL);
+ break;
+ default:
+einval: errno = EINVAL;
+ return (RET_ERROR);
+ }
+
+ /*
+ * Make sure that records up to and including the put record are
+ * already in the database. If skipping records, create empty ones.
+ */
+ if (nrec > t->bt_nrecs) {
+ if (!F_ISSET(t, R_EOF | R_INMEM) &&
+ t->bt_irec(t, nrec) == RET_ERROR)
+ return (RET_ERROR);
+ if (nrec > t->bt_nrecs + 1) {
+ if (F_ISSET(t, R_FIXLEN)) {
+ if ((tdata.data =
+ (void *)malloc(t->bt_reclen)) == NULL)
+ return (RET_ERROR);
+ tdata.size = t->bt_reclen;
+ memset(tdata.data, t->bt_bval, tdata.size);
+ } else {
+ tdata.data = NULL;
+ tdata.size = 0;
+ }
+ while (nrec > t->bt_nrecs + 1)
+ if (__rec_iput(t,
+ t->bt_nrecs, &tdata, 0) != RET_SUCCESS)
+ return (RET_ERROR);
+ if (F_ISSET(t, R_FIXLEN))
+ free(tdata.data);
+ }
+ }
+
+ if ((status = __rec_iput(t, nrec - 1, &fdata, flags)) != RET_SUCCESS)
+ return (status);
+
+ switch (flags) {
+ case R_IAFTER:
+ nrec++;
+ break;
+ case R_SETCURSOR:
+ t->bt_cursor.rcursor = nrec;
+ break;
+ }
+
+ F_SET(t, R_MODIFIED);
+ return (__rec_ret(t, NULL, nrec, key, NULL));
+}
+
+/*
+ * __REC_IPUT -- Add a recno item to the tree.
+ *
+ * Parameters:
+ * t: tree
+ * nrec: record number
+ * data: data
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS
+ */
+int
+__rec_iput(BTREE *t, recno_t nrec, const DBT *data, u_int flags)
+{
+ DBT tdata;
+ EPG *e;
+ PAGE *h;
+ indx_t idx, nxtindex;
+ pgno_t pg;
+ u_int32_t nbytes;
+ int dflags, status;
+ char *dest, db[NOVFLSIZE];
+
+ /*
+ * If the data won't fit on a page, store it on indirect pages.
+ *
+ * XXX
+ * If the insert fails later on, these pages aren't recovered.
+ */
+ if (data->size > t->bt_ovflsize) {
+ if (__ovfl_put(t, data, &pg) == RET_ERROR)
+ return (RET_ERROR);
+ tdata.data = db;
+ tdata.size = NOVFLSIZE;
+ *(pgno_t *)db = pg;
+ *(u_int32_t *)(db + sizeof(pgno_t)) = data->size;
+ dflags = P_BIGDATA;
+ data = &tdata;
+ } else
+ dflags = 0;
+
+ /* __rec_search pins the returned page. */
+ if ((e = __rec_search(t, nrec,
+ nrec > t->bt_nrecs || flags == R_IAFTER || flags == R_IBEFORE ?
+ SINSERT : SEARCH)) == NULL)
+ return (RET_ERROR);
+
+ h = e->page;
+ idx = e->index;
+
+ /*
+ * Add the specified key/data pair to the tree. The R_IAFTER and
+ * R_IBEFORE flags insert the key after/before the specified key.
+ *
+ * Pages are split as required.
+ */
+ switch (flags) {
+ case R_IAFTER:
+ ++idx;
+ break;
+ case R_IBEFORE:
+ break;
+ default:
+ if (nrec < t->bt_nrecs &&
+ __rec_dleaf(t, h, idx) == RET_ERROR) {
+ mpool_put(t->bt_mp, h, 0);
+ return (RET_ERROR);
+ }
+ break;
+ }
+
+ /*
+ * If not enough room, split the page. The split code will insert
+ * the key and data and unpin the current page. If inserting into
+ * the offset array, shift the pointers up.
+ */
+ nbytes = NRLEAFDBT(data->size);
+ if ((u_int32_t)(h->upper - h->lower) < nbytes + sizeof(indx_t)) {
+ status = __bt_split(t, h, NULL, data, dflags, nbytes, idx);
+ if (status == RET_SUCCESS)
+ ++t->bt_nrecs;
+ return (status);
+ }
+
+ if (idx < (nxtindex = NEXTINDEX(h)))
+ memmove(h->linp + idx + 1, h->linp + idx,
+ (nxtindex - idx) * sizeof(indx_t));
+ h->lower += sizeof(indx_t);
+
+ h->linp[idx] = h->upper -= nbytes;
+ dest = (char *)h + h->upper;
+ WR_RLEAF(dest, data, dflags);
+
+ ++t->bt_nrecs;
+ F_SET(t, B_MODIFIED);
+ mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+
+ return (RET_SUCCESS);
+}
diff --git a/freebsd-userspace/lib/libc/db/recno/rec_search.c b/freebsd-userspace/lib/libc/db/recno/rec_search.c
new file mode 100644
index 0000000..2d98b95
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/recno/rec_search.c
@@ -0,0 +1,123 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rec_search.c 8.4 (Berkeley) 7/14/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stdio.h>
+
+#include <db.h>
+#include "recno.h"
+
+/*
+ * __REC_SEARCH -- Search a btree for a key.
+ *
+ * Parameters:
+ * t: tree to search
+ * recno: key to find
+ * op: search operation
+ *
+ * Returns:
+ * EPG for matching record, if any, or the EPG for the location of the
+ * key, if it were inserted into the tree.
+ *
+ * Returns:
+ * The EPG for matching record, if any, or the EPG for the location
+ * of the key, if it were inserted into the tree, is entered into
+ * the bt_cur field of the tree. A pointer to the field is returned.
+ */
+EPG *
+__rec_search(BTREE *t, recno_t recno, enum SRCHOP op)
+{
+ indx_t idx;
+ PAGE *h;
+ EPGNO *parent;
+ RINTERNAL *r;
+ pgno_t pg;
+ indx_t top;
+ recno_t total;
+ int sverrno;
+
+ BT_CLR(t);
+ for (pg = P_ROOT, total = 0;;) {
+ if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
+ goto err;
+ if (h->flags & P_RLEAF) {
+ t->bt_cur.page = h;
+ t->bt_cur.index = recno - total;
+ return (&t->bt_cur);
+ }
+ for (idx = 0, top = NEXTINDEX(h);;) {
+ r = GETRINTERNAL(h, idx);
+ if (++idx == top || total + r->nrecs > recno)
+ break;
+ total += r->nrecs;
+ }
+
+ BT_PUSH(t, pg, idx - 1);
+
+ pg = r->pgno;
+ switch (op) {
+ case SDELETE:
+ --GETRINTERNAL(h, (idx - 1))->nrecs;
+ mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+ break;
+ case SINSERT:
+ ++GETRINTERNAL(h, (idx - 1))->nrecs;
+ mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+ break;
+ case SEARCH:
+ mpool_put(t->bt_mp, h, 0);
+ break;
+ }
+
+ }
+ /* Try and recover the tree. */
+err: sverrno = errno;
+ if (op != SEARCH)
+ while ((parent = BT_POP(t)) != NULL) {
+ if ((h = mpool_get(t->bt_mp, parent->pgno, 0)) == NULL)
+ break;
+ if (op == SINSERT)
+ --GETRINTERNAL(h, parent->index)->nrecs;
+ else
+ ++GETRINTERNAL(h, parent->index)->nrecs;
+ mpool_put(t->bt_mp, h, MPOOL_DIRTY);
+ }
+ errno = sverrno;
+ return (NULL);
+}
diff --git a/freebsd-userspace/lib/libc/db/recno/rec_seq.c b/freebsd-userspace/lib/libc/db/recno/rec_seq.c
new file mode 100644
index 0000000..b6430aa
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/recno/rec_seq.c
@@ -0,0 +1,129 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+/* XXX use __SCCSID */
+static char sccsid[] __unused = "@(#)rec_seq.c 8.3 (Berkeley) 7/14/94";
+#endif /* not lint */
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <db.h>
+#include "recno.h"
+
+/*
+ * __REC_SEQ -- Recno sequential scan interface.
+ *
+ * Parameters:
+ * dbp: pointer to access method
+ * key: key for positioning and return value
+ * data: data return value
+ * flags: R_CURSOR, R_FIRST, R_LAST, R_NEXT, R_PREV.
+ *
+ * Returns:
+ * RET_ERROR, RET_SUCCESS or RET_SPECIAL if there's no next key.
+ */
+int
+__rec_seq(const DB *dbp, DBT *key, DBT *data, u_int flags)
+{
+ BTREE *t;
+ EPG *e;
+ recno_t nrec;
+ int status;
+
+ t = dbp->internal;
+
+ /* Toss any page pinned across calls. */
+ if (t->bt_pinned != NULL) {
+ mpool_put(t->bt_mp, t->bt_pinned, 0);
+ t->bt_pinned = NULL;
+ }
+
+ switch(flags) {
+ case R_CURSOR:
+ if ((nrec = *(recno_t *)key->data) == 0)
+ goto einval;
+ break;
+ case R_NEXT:
+ if (F_ISSET(&t->bt_cursor, CURS_INIT)) {
+ nrec = t->bt_cursor.rcursor + 1;
+ break;
+ }
+ /* FALLTHROUGH */
+ case R_FIRST:
+ nrec = 1;
+ break;
+ case R_PREV:
+ if (F_ISSET(&t->bt_cursor, CURS_INIT)) {
+ if ((nrec = t->bt_cursor.rcursor - 1) == 0)
+ return (RET_SPECIAL);
+ break;
+ }
+ /* FALLTHROUGH */
+ case R_LAST:
+ if (!F_ISSET(t, R_EOF | R_INMEM) &&
+ t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR)
+ return (RET_ERROR);
+ nrec = t->bt_nrecs;
+ break;
+ default:
+einval: errno = EINVAL;
+ return (RET_ERROR);
+ }
+
+ if (t->bt_nrecs == 0 || nrec > t->bt_nrecs) {
+ if (!F_ISSET(t, R_EOF | R_INMEM) &&
+ (status = t->bt_irec(t, nrec)) != RET_SUCCESS)
+ return (status);
+ if (t->bt_nrecs == 0 || nrec > t->bt_nrecs)
+ return (RET_SPECIAL);
+ }
+
+ if ((e = __rec_search(t, nrec - 1, SEARCH)) == NULL)
+ return (RET_ERROR);
+
+ F_SET(&t->bt_cursor, CURS_INIT);
+ t->bt_cursor.rcursor = nrec;
+
+ status = __rec_ret(t, e, nrec, key, data);
+ if (F_ISSET(t, B_DB_LOCK))
+ mpool_put(t->bt_mp, e->page, 0);
+ else
+ t->bt_pinned = e->page;
+ return (status);
+}
diff --git a/freebsd-userspace/lib/libc/db/recno/rec_utils.c b/freebsd-userspace/lib/libc/db/recno/rec_utils.c
new file mode 100644
index 0000000..4bd4530
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/recno/rec_utils.c
@@ -0,0 +1,114 @@
+#include "port_before.h"
+
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rec_utils.c 8.6 (Berkeley) 7/16/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <db.h>
+#include "recno.h"
+
+/*
+ * __rec_ret --
+ * Build return data.
+ *
+ * Parameters:
+ * t: tree
+ * e: key/data pair to be returned
+ * nrec: record number
+ * key: user's key structure
+ * data: user's data structure
+ *
+ * Returns:
+ * RET_SUCCESS, RET_ERROR.
+ */
+int
+__rec_ret(BTREE *t, EPG *e, recno_t nrec, DBT *key, DBT *data)
+{
+ RLEAF *rl;
+ void *p;
+
+ if (key == NULL)
+ goto dataonly;
+
+ /* We have to copy the key, it's not on the page. */
+ if (sizeof(recno_t) > t->bt_rkey.size) {
+ p = realloc(t->bt_rkey.data, sizeof(recno_t));
+ if (p == NULL)
+ return (RET_ERROR);
+ t->bt_rkey.data = p;
+ t->bt_rkey.size = sizeof(recno_t);
+ }
+ memmove(t->bt_rkey.data, &nrec, sizeof(recno_t));
+ key->size = sizeof(recno_t);
+ key->data = t->bt_rkey.data;
+
+dataonly:
+ if (data == NULL)
+ return (RET_SUCCESS);
+
+ /*
+ * We must copy big keys/data to make them contigous. Otherwise,
+ * leave the page pinned and don't copy unless the user specified
+ * concurrent access.
+ */
+ rl = GETRLEAF(e->page, e->index);
+ if (rl->flags & P_BIGDATA) {
+ if (__ovfl_get(t, rl->bytes,
+ &data->size, &t->bt_rdata.data, &t->bt_rdata.size))
+ return (RET_ERROR);
+ data->data = t->bt_rdata.data;
+ } else if (F_ISSET(t, B_DB_LOCK)) {
+ /* Use +1 in case the first record retrieved is 0 length. */
+ if (rl->dsize + 1 > t->bt_rdata.size) {
+ p = realloc(t->bt_rdata.data, rl->dsize + 1);
+ if (p == NULL)
+ return (RET_ERROR);
+ t->bt_rdata.data = p;
+ t->bt_rdata.size = rl->dsize + 1;
+ }
+ memmove(t->bt_rdata.data, rl->bytes, rl->dsize);
+ data->size = rl->dsize;
+ data->data = t->bt_rdata.data;
+ } else {
+ data->size = rl->dsize;
+ data->data = rl->bytes;
+ }
+ return (RET_SUCCESS);
+}
diff --git a/freebsd-userspace/lib/libc/db/recno/recno.h b/freebsd-userspace/lib/libc/db/recno/recno.h
new file mode 100644
index 0000000..5c56170
--- /dev/null
+++ b/freebsd-userspace/lib/libc/db/recno/recno.h
@@ -0,0 +1,36 @@
+/*-
+ * Copyright (c) 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)recno.h 8.1 (Berkeley) 6/4/93
+ * $FreeBSD$
+ */
+
+enum SRCHOP { SDELETE, SINSERT, SEARCH}; /* Rec_search operation. */
+
+#include "../btree/btree.h"
+#include "extern.h"
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