From fe08cee338d3d75443d4705e071468b5f30a465f Mon Sep 17 00:00:00 2001
From: molivier <molivier@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Tue, 30 Sep 2003 12:54:02 +0000
Subject: [PATCH] Added strlcat and strlcpy, from OpenBSD. They are smart
 replacements for strncat and strncpy - see
 http://www.courtesan.com/todd/papers/strlcpy.html or their manual pages on
 the OpenBSD website for details

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@3517 d7cf8633-e32d-0410-b094-e92efae38249
---
 common.c | 82 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 common.h | 23 ++++++++++++++++
 2 files changed, 105 insertions(+)

diff --git a/common.c b/common.c
index 4ff60bb9..38b01f00 100644
--- a/common.c
+++ b/common.c
@@ -937,3 +937,85 @@ char *SearchInfostring(const char *infostring, const char *key)
 	}
 }
 
+
+//========================================================
+// strlcat and strlcpy, from OpenBSD
+
+/*
+ * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*	$OpenBSD: strlcat.c,v 1.11 2003/06/17 21:56:24 millert Exp $	*/
+/*	$OpenBSD: strlcpy.c,v 1.8 2003/06/17 21:56:24 millert Exp $	*/
+
+
+// Most (all?) BSDs already have them
+#if !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__FreeBSD__)
+
+size_t
+strlcat(char *dst, const char *src, size_t siz)
+{
+	register char *d = dst;
+	register const char *s = src;
+	register size_t n = siz;
+	size_t dlen;
+
+	/* Find the end of dst and adjust bytes left but don't go past end */
+	while (n-- != 0 && *d != '\0')
+		d++;
+	dlen = d - dst;
+	n = siz - dlen;
+
+	if (n == 0)
+		return(dlen + strlen(s));
+	while (*s != '\0') {
+		if (n != 1) {
+			*d++ = *s;
+			n--;
+		}
+		s++;
+	}
+	*d = '\0';
+
+	return(dlen + (s - src));	/* count does not include NUL */
+}
+
+size_t
+strlcpy(char *dst, const char *src, size_t siz)
+{
+	register char *d = dst;
+	register const char *s = src;
+	register size_t n = siz;
+
+	/* Copy as many bytes as will fit */
+	if (n != 0 && --n != 0) {
+		do {
+			if ((*d++ = *s++) == 0)
+				break;
+		} while (--n != 0);
+	}
+
+	/* Not enough room in dst, add NUL and traverse rest of src */
+	if (n == 0) {
+		if (siz != 0)
+			*d = '\0';		/* NUL-terminate dst */
+		while (*s++)
+			;
+	}
+
+	return(s - src - 1);	/* count does not include NUL */
+}
+
+#endif  // #if !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__FreeBSD__)
diff --git a/common.h b/common.h
index dad626ca..5e3a0bd0 100644
--- a/common.h
+++ b/common.h
@@ -193,5 +193,28 @@ void freedirectory(stringlist_t *list);
 
 char *SearchInfostring(const char *infostring, const char *key);
 
+
+// strlcat and strlcpy, from OpenBSD
+// Most (all?) BSDs already have them
+#if !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__FreeBSD__)
+
+/*
+ * Appends src to string dst of size siz (unlike strncat, siz is the
+ * full size of dst, not space left).  At most siz-1 characters
+ * will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
+ * Returns strlen(src) + MIN(siz, strlen(initial dst)).
+ * If retval >= siz, truncation occurred.
+ */
+size_t strlcat(char *dst, const char *src, size_t siz);
+
+/*
+ * Copy src to string dst of size siz.  At most siz-1 characters
+ * will be copied.  Always NUL terminates (unless siz == 0).
+ * Returns strlen(src); if retval >= siz, truncation occurred.
+ */
+size_t strlcpy(char *dst, const char *src, size_t siz);
+
+#endif  // #if !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__FreeBSD__)
+
 #endif
 
-- 
2.39.2