Author: pfg
Date: Mon Apr 6 03:21:22 2015
New Revision: 281135
URL: https://svnweb.freebsd.org/changeset/base/281135
Log:
Make strlcpy/strlcat slightly easier to read.
Bring small upstream updates.
Obtained from: OpenBSD
Modified:
head/lib/libc/string/strlcat.c
head/lib/libc/string/strlcpy.c
Modified: head/lib/libc/string/strlcat.c
==============================================================================
--- head/lib/libc/string/strlcat.c Mon Apr 6 03:16:20 2015
(r281134)
+++ head/lib/libc/string/strlcat.c Mon Apr 6 03:21:22 2015
(r281135)
@@ -1,7 +1,7 @@
-/* $OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $ */
+/* $OpenBSD: strlcat.c,v 1.15 2015/03/02 21:41:08 millert Exp $ */
/*
- * Copyright (c) 1998 Todd C. Miller <todd.mil...@courtesan.com>
+ * Copyright (c) 1998, 2015 Todd C. Miller <todd.mil...@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
@@ -23,36 +23,36 @@ __FBSDID("$FreeBSD$");
#include <string.h>
/*
- * 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.
+ * Appends src to string dst of size dsize (unlike strncat, dsize is the
+ * full size of dst, not space left). At most dsize-1 characters
+ * will be copied. Always NUL terminates (unless dsize <= strlen(dst)).
+ * Returns strlen(src) + MIN(dsize, strlen(initial dst)).
+ * If retval >= dsize, truncation occurred.
*/
size_t
-strlcat(char * __restrict dst, const char * __restrict src, size_t siz)
+strlcat(char * __restrict dst, const char * __restrict src, size_t dsize)
{
- char *d = dst;
- const char *s = src;
- size_t n = siz;
+ const char *odst = dst;
+ const char *osrc = src;
+ size_t n = dsize;
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;
+ /* Find the end of dst and adjust bytes left but don't go past end. */
+ while (n-- != 0 && *dst != '\0')
+ dst++;
+ dlen = dst - odst;
+ n = dsize - dlen;
+
+ if (n-- == 0)
+ return(dlen + strlen(src));
+ while (*src != '\0') {
+ if (n != 0) {
+ *dst++ = *src;
n--;
}
- s++;
+ src++;
}
- *d = '\0';
+ *dst = '\0';
- return(dlen + (s - src)); /* count does not include NUL */
+ return(dlen + (src - osrc)); /* count does not include NUL */
}
Modified: head/lib/libc/string/strlcpy.c
==============================================================================
--- head/lib/libc/string/strlcpy.c Mon Apr 6 03:16:20 2015
(r281134)
+++ head/lib/libc/string/strlcpy.c Mon Apr 6 03:21:22 2015
(r281135)
@@ -1,7 +1,7 @@
-/* $OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $ */
+/* $OpenBSD: strlcpy.c,v 1.12 2015/01/15 03:54:12 millert Exp $ */
/*
- * Copyright (c) 1998 Todd C. Miller <todd.mil...@courtesan.com>
+ * Copyright (c) 1998, 2015 Todd C. Miller <todd.mil...@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
@@ -23,32 +23,31 @@ __FBSDID("$FreeBSD$");
#include <string.h>
/*
- * 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.
+ * Copy string src to buffer dst of size dsize. At most dsize-1
+ * chars will be copied. Always NUL terminates (unless dsize == 0).
+ * Returns strlen(src); if retval >= dsize, truncation occurred.
*/
size_t
-strlcpy(char * __restrict dst, const char * __restrict src, size_t siz)
+strlcpy(char * __restrict dst, const char * __restrict src, size_t dsize)
{
- char *d = dst;
- const char *s = src;
- size_t n = siz;
-
- /* Copy as many bytes as will fit */
- if (n != 0) {
- while (--n != 0) {
- if ((*d++ = *s++) == '\0')
+ const char *osrc = src;
+ size_t nleft = dsize;
+
+ /* Copy as many bytes as will fit. */
+ if (nleft != 0) {
+ while (--nleft != 0) {
+ if ((*dst++ = *src++) == '\0')
break;
}
}
- /* 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++)
+ /* Not enough room in dst, add NUL and traverse rest of src. */
+ if (nleft == 0) {
+ if (dsize != 0)
+ *dst = '\0'; /* NUL-terminate dst */
+ while (*src++)
;
}
- return(s - src - 1); /* count does not include NUL */
+ return(src - osrc - 1); /* count does not include NUL */
}
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