[rtems commit] tools: Provide strnlen() if missing

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    9ab1558f6ed457bb380131c2221069df62b55d3a
Changeset: http://git.rtems.org/rtems/commit/?id=9ab1558f6ed457bb380131c2221069df62b55d3a

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Tue Dec  2 12:42:23 2014 +0100

tools: Provide strnlen() if missing

---

 tools/build/Makefile.am  |  4 ++--
 tools/build/compat.c     | 44 ++++++++++++++++++++++++++++++++++++++++++++
 tools/build/config.h.in  |  3 +++
 tools/build/configure.ac |  2 +-
 4 files changed, 50 insertions(+), 3 deletions(-)

diff --git a/tools/build/Makefile.am b/tools/build/Makefile.am
index e879491..5c6f7ba 100644
--- a/tools/build/Makefile.am
+++ b/tools/build/Makefile.am
@@ -5,9 +5,9 @@ bin_PROGRAMS = cklength eolstrip packhex unhex rtems-bin2c
 noinst_PROGRAMS = binpatch
 
 cklength_SOURCES = cklength.c
-eolstrip_SOURCES = eolstrip.c
+eolstrip_SOURCES = eolstrip.c compat.c
 packhex_SOURCES = packhex.c
-unhex_SOURCES = unhex.c
+unhex_SOURCES = unhex.c compat.c
 binpatch_SOURCES = binpatch.c
 rtems_bin2c_SOURCES = rtems-bin2c.c
 
diff --git a/tools/build/compat.c b/tools/build/compat.c
new file mode 100644
index 0000000..9c6eb10
--- /dev/null
+++ b/tools/build/compat.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2014 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <info at embedded-brains.de>
+ *
+ * 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 COPYRIGHT HOLDERS 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 COPYRIGHT
+ * OWNER 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 "config.h"
+
+#include <string.h>
+
+#if !HAVE_STRNLEN
+size_t strnlen(const char *s, size_t maxlen)
+{
+  const char *n = memchr(s, '\0', maxlen);
+
+  return n != NULL ? n - s : maxlen;
+}
+#endif
diff --git a/tools/build/config.h.in b/tools/build/config.h.in
index 7274c7c..9aa5c43 100644
--- a/tools/build/config.h.in
+++ b/tools/build/config.h.in
@@ -30,6 +30,9 @@
 /* Define to 1 if you have the <string.h> header file. */
 #undef HAVE_STRING_H
 
+/* Define to 1 if you have the `strnlen' function. */
+#undef HAVE_STRNLEN
+
 /* Define to 1 if you have the `strtol' function. */
 #undef HAVE_STRTOL
 
diff --git a/tools/build/configure.ac b/tools/build/configure.ac
index 0d8b2a2..616b28c 100644
--- a/tools/build/configure.ac
+++ b/tools/build/configure.ac
@@ -10,7 +10,7 @@ AM_MAINTAINER_MODE
 
 AC_PROG_CC
 AC_CHECK_HEADERS([getopt.h libgen.h])
-AC_CHECK_FUNCS(strerror strtol basename)
+AC_CHECK_FUNCS(strerror strtol basename strnlen)
 
 RTEMS_PATH_KSH