[PATCH v4] Port ndbm
Vaibhav Gupta
vaibhavgupta40 at gmail.com
Tue Jul 9 18:19:24 UTC 2019
---
newlib/libc/include/ndbm.h | 91 ++++++++++++++
newlib/libc/search/Makefile.am | 1 +
newlib/libc/search/ndbm.c | 220 +++++++++++++++++++++++++++++++++
3 files changed, 312 insertions(+)
create mode 100644 newlib/libc/include/ndbm.h
create mode 100644 newlib/libc/search/ndbm.c
diff --git a/newlib/libc/include/ndbm.h b/newlib/libc/include/ndbm.h
new file mode 100644
index 000000000..6761d4897
--- /dev/null
+++ b/newlib/libc/include/ndbm.h
@@ -0,0 +1,91 @@
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 1990, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * 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. 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.
+ *
+ * @(#)ndbm.h 8.1 (Berkeley) 6/2/93
+ * $FreeBSD$
+ */
+
+#ifndef _NDBM_H_
+#define _NDBM_H_
+
+/* #include <db.h> */
+
+/*
+* The above header-file is directly included in `newlib/libc/search/ndbm.c`
+* as `db.h` is present in form of `db_local.h`, that too inside
+* `newlib/libc/search` directory and not in `newlib/libc/include`.
+* Necessary data-types are mentioned in form of forward-declarations
+*/
+
+/* Map dbm interface onto db(3). */
+#define DBM_RDONLY O_RDONLY
+
+/* Flags to dbm_store(). */
+#define DBM_INSERT 0
+#define DBM_REPLACE 1
+
+/*
+ * The db(3) support for ndbm always appends this suffix to the
+ * file name to avoid overwriting the user's original database.
+ */
+#define DBM_SUFFIX ".db"
+
+typedef struct {
+ void *dptr;
+ int dsize; /* XXX Should be size_t according to 1003.1-2008. */
+} datum;
+
+struct __db; /* Forward-declaration */
+typedef struct __db DB; /* Forward-declaration */
+typedef DB DBM;
+#define dbm_pagfno(a) DBM_PAGFNO_NOT_AVAILABLE
+
+__BEGIN_DECLS
+int dbm_clearerr(DBM *);
+void dbm_close(DBM *);
+int dbm_delete(DBM *, datum);
+int dbm_error(DBM *);
+datum dbm_fetch(DBM *, datum);
+datum dbm_firstkey(DBM *);
+#if __BSD_VISIBLE
+long dbm_forder(DBM *, datum);
+#endif
+datum dbm_nextkey(DBM *);
+DBM *dbm_open(const char *, int, mode_t);
+int dbm_store(DBM *, datum, datum, int);
+#if __BSD_VISIBLE
+int dbm_dirfno(DBM *);
+#endif
+__END_DECLS
+
+#endif /* !_NDBM_H_ */
diff --git a/newlib/libc/search/Makefile.am b/newlib/libc/search/Makefile.am
index 98920c3f4..a61107fb9 100644
--- a/newlib/libc/search/Makefile.am
+++ b/newlib/libc/search/Makefile.am
@@ -9,6 +9,7 @@ GENERAL_SOURCES = \
db_local.h \
extern.h \
hash.h \
+ ndbm.c \
page.h \
qsort.c
diff --git a/newlib/libc/search/ndbm.c b/newlib/libc/search/ndbm.c
new file mode 100644
index 000000000..7226be1d1
--- /dev/null
+++ b/newlib/libc/search/ndbm.c
@@ -0,0 +1,220 @@
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 1990, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * 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. 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[] = "@(#)ndbm.c 8.4 (Berkeley) 7/21/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$ : src/lib/libc/db/hash/ndbm.c Nov 20 19:49:47 2017 UTC by pfg");
+
+/*
+ * This package provides a dbm compatible interface to the new hashing
+ * package described in db(3).
+ */
+
+#include <sys/param.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include <ndbm.h>
+#include "hash.h"
+
+#ifndef __DBINTERFACE_PRIVATE
+#define __DBINTERFACE_PRIVATE
+#endif
+
+#include "db_local.h"
+
+/*
+ * Returns:
+ * *DBM on success
+ * NULL on failure
+ */
+extern DBM *
+dbm_open(const char *file, int flags, mode_t mode)
+{
+ HASHINFO info;
+ char path[MAXPATHLEN];
+
+ info.bsize = 4096;
+ info.ffactor = 40;
+ info.nelem = 1;
+ info.cachesize = 0;
+ info.hash = NULL;
+ info.lorder = 0;
+
+ if( strlen(file) >= sizeof(path) - strlen(DBM_SUFFIX)) {
+ errno = ENAMETOOLONG;
+ return(NULL);
+ }
+ (void)strcpy(path, file);
+ (void)strcat(path, DBM_SUFFIX);
+ return ((DBM *)__hash_open(path, flags, mode, 0, &info));
+}
+
+extern void
+dbm_close(DBM *db)
+{
+ (void)(db->close)(db);
+}
+
+/*
+ * Returns:
+ * DATUM on success
+ * NULL on failure
+ */
+extern datum
+dbm_fetch(DBM *db, datum key)
+{
+ datum retdata;
+ int status;
+ DBT dbtkey, dbtretdata;
+
+ dbtkey.data = key.dptr;
+ dbtkey.size = key.dsize;
+ status = (db->get)(db, &dbtkey, &dbtretdata, 0);
+ if (status) {
+ dbtretdata.data = NULL;
+ dbtretdata.size = 0;
+ }
+ retdata.dptr = dbtretdata.data;
+ retdata.dsize = dbtretdata.size;
+ return (retdata);
+}
+
+/*
+ * Returns:
+ * DATUM on success
+ * NULL on failure
+ */
+extern datum
+dbm_firstkey(DBM *db)
+{
+ int status;
+ datum retkey;
+ DBT dbtretkey, dbtretdata;
+
+ status = (db->seq)(db, &dbtretkey, &dbtretdata, R_FIRST);
+ if (status)
+ dbtretkey.data = NULL;
+ retkey.dptr = dbtretkey.data;
+ retkey.dsize = dbtretkey.size;
+ return (retkey);
+}
+
+/*
+ * Returns:
+ * DATUM on success
+ * NULL on failure
+ */
+extern datum
+dbm_nextkey(DBM *db)
+{
+ int status;
+ datum retkey;
+ DBT dbtretkey, dbtretdata;
+
+ status = (db->seq)(db, &dbtretkey, &dbtretdata, R_NEXT);
+ if (status)
+ dbtretkey.data = NULL;
+ retkey.dptr = dbtretkey.data;
+ retkey.dsize = dbtretkey.size;
+ return (retkey);
+}
+
+/*
+ * Returns:
+ * 0 on success
+ * <0 failure
+ */
+extern int
+dbm_delete(DBM *db, datum key)
+{
+ int status;
+ DBT dbtkey;
+
+ dbtkey.data = key.dptr;
+ dbtkey.size = key.dsize;
+ status = (db->del)(db, &dbtkey, 0);
+ if (status)
+ return (-1);
+ else
+ return (0);
+}
+
+/*
+ * Returns:
+ * 0 on success
+ * <0 failure
+ * 1 if DBM_INSERT and entry exists
+ */
+extern int
+dbm_store(DBM *db, datum key, datum data, int flags)
+{
+ DBT dbtkey, dbtdata;
+
+ dbtkey.data = key.dptr;
+ dbtkey.size = key.dsize;
+ dbtdata.data = data.dptr;
+ dbtdata.size = data.dsize;
+ return ((db->put)(db, &dbtkey, &dbtdata,
+ (flags == DBM_INSERT) ? R_NOOVERWRITE : 0));
+}
+
+extern int
+dbm_error(DBM *db)
+{
+ HTAB *hp;
+
+ hp = (HTAB *)db->internal;
+ return (hp->error);
+}
+
+extern int
+dbm_clearerr(DBM *db)
+{
+ HTAB *hp;
+
+ hp = (HTAB *)db->internal;
+ hp->error = 0;
+ return (0);
+}
+
+extern int
+dbm_dirfno(DBM *db)
+{
+ return(((HTAB *)db->internal)->fp);
+}
--
2.21.0
More information about the devel
mailing list