From 66ee55e5947682d10eed7a36b9da72a8cf6a40f2 Mon Sep 17 00:00:00 2001
From: Stef Walter <stefw@gnome.org>
Date: Sun, 3 Mar 2013 09:52:21 +0100
Subject: Add compat strndup() function

Not available on Win32 and ancient unixes
---
 common/compat.c | 22 ++++++++++++++++++++++
 common/compat.h |  7 +++++++
 configure.ac    |  1 +
 3 files changed, 30 insertions(+)

diff --git a/common/compat.c b/common/compat.c
index af28e1d..ff8ee08 100644
--- a/common/compat.c
+++ b/common/compat.c
@@ -424,6 +424,28 @@ memdup (const void *data,
 
 #endif /* HAVE_MEMDUP */
 
+#ifndef HAVE_STRNDUP
+
+char *
+strndup (const char *data,
+         size_t length)
+{
+	char *ret;
+	size_t len;
+
+	len = strlen (data);
+	if (length > len)
+		length = len;
+
+	ret = memdup (data, length + 1);
+	if (ret != NULL)
+		ret[length] = 0;
+
+	return ret;
+}
+
+#endif /* HAVE_STRDUP */
+
 #ifndef HAVE_STRCONCAT
 
 #include <stdarg.h>
diff --git a/common/compat.h b/common/compat.h
index ad80ca5..27e4403 100644
--- a/common/compat.h
+++ b/common/compat.h
@@ -223,6 +223,13 @@ void *     memdup           (const void *data,
 
 #endif /* HAVE_MEMDUP */
 
+#ifndef HAVE_STRNDUP
+
+char *     strndup          (const char *data,
+                             size_t length);
+
+#endif /* HAVE_STRDUP */
+
 #ifdef HAVE_STDBOOL_H
 #include <stdbool.h>
 #else
diff --git a/configure.ac b/configure.ac
index ef6f06f..11ac492 100644
--- a/configure.ac
+++ b/configure.ac
@@ -76,6 +76,7 @@ if test "$os_unix" = "yes"; then
 	# These are thngs we can work around
 	AC_CHECK_MEMBERS([struct dirent.d_type],,,[#include <dirent.h>])
 	AC_CHECK_FUNCS([getprogname getexecname basename mkstemp mkdtemp])
+	AC_CHECK_FUNCS([strnstr memdup strndup])
 
 	# Check if these are declared and/or available to link against
 	AC_CHECK_DECLS([program_invocation_short_name])
-- 
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