string handling security fixes

patch by Nicholas Kain, Alexander Strasser <eclipse7@gmx.net>
reviewed by Pontscho, Alex, Rich


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@12647 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 47 insertions, 0 deletions

diff --git a/osdep/strl.c b/osdep/strl.c
new file mode 100644
index 0000000000..22e4cb56c3
--- /dev/null
+++ b/osdep/strl.c
@@ -0,0 +1,47 @@
+/* strl(cat|cpy) implementation for systems that do not have it in libc */
+/* strl.c - strlcpy/strlcat implementation
+ * Time-stamp: <2004-03-14 njk>
+ * (C) 2003-2004 Nicholas J. Kain <njk@aerifal.cx>
+ */
+
+#include "../config.h"
+
+#ifndef HAVE_STRLCPY
+unsigned int strlcpy (char *dest, char *src, unsigned int size)
+{
+	register unsigned int i;
+
+	for (i=0; size > 0 && src[i] != '\0'; ++i, size--)
+		dest[i] = src[i];
+
+	dest[i] = '\0';
+
+	return i;
+}
+#endif
+
+#ifndef HAVE_STRLCAT
+unsigned int strlcat (char *dest, char *src, unsigned int size)
+{
+#if 0
+	register unsigned int i, j;
+
+	for(i=0; size > 0 && dest[i] != '\0'; size--, i++);
+	for(j=0; size > 0 && src[j] != '\0'; size--, i++, j++)
+		dest[i] = src[j];
+
+	dest[i] = '\0';
+	return i;
+#else
+	register char *d = dest, *s = src;
+
+	for (; size > 0 && *d != '\0'; size--, d++);
+	for (; size > 0 && *s != '\0'; size--, d++, s++)
+		*d = *s;
+
+	*d = '\0';
+	return (d - dest) + (s - src);
+#endif 
+}
+#endif
+