Added strlcat and strlcpy, from OpenBSD. They are smart replacements for strncat...

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@3517 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/common.c b/common.c
index 4ff60bb9d4c9fd97bb5ca0acd82315c5f84efe1a..38b01f0061b5d8d9daf584e057700fb4695b6ca3 100644 (file)
--- 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 dad626ca71ebf8e339cf7274d0bcbfb99297fe54..5e3a0bd0884e4d374e2c409b22eef30aff9c5307 100644 (file)
--- 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