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sync with lib/libc/string/strlfun.c

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tg
2006-11-08 22:54:55 +00:00
parent d98866057c
commit ddeb1948b8
1 changed files with 109 additions and 80 deletions
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189
strlfun.c
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@@ -1,52 +1,117 @@
/* $MirOS: src/bin/mksh/strlfun.c,v 1.3 2006/08/01 13:43:28 tg Exp $ */
/* _MirOS: src/lib/libc/string/strlfun.c,v 1.7 2006/08/01 13:41:49 tg Exp $ */
/* $OpenBSD: strlcpy.c,v 1.10 2005/08/08 08:05:37 espie Exp $ */
/* $OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $ */
/* $MirOS: src/bin/mksh/strlfun.c,v 1.4 2006/11/08 22:54:55 tg Exp $ */
/* _MirOS: src/lib/libc/string/strlfun.c,v 1.8 2006/11/08 22:48:59 tg Exp $ */
/*-
* Copyright (c) 2006
* Thorsten Glaser <tg@mirbsd.de>
*
* Licensee is hereby permitted to deal in this work without restric-
* tion, including unlimited rights to use, publicly perform, modify,
* merge, distribute, sell, give away or sublicence, provided all co-
* pyright notices above, these terms and the disclaimer are retained
* in all redistributions or reproduced in accompanying documentation
* or other materials provided with binary redistributions.
*
* Licensor offers the work "AS IS" and WITHOUT WARRANTY of any kind,
* express, or implied, to the maximum extent permitted by applicable
* law, without malicious intent or gross negligence; in no event may
* licensor, an author or contributor be held liable for any indirect
* or other damage, or direct damage except proven a consequence of a
* direct error of said person and intended use of this work, loss or
* other issues arising in any way out of its use, even if advised of
* the possibility of such damage or existence of a defect.
*-
* The strlcat() code below has been written by Thorsten Glaser. Bodo
* Eggert suggested optimising the strlcpy() code, originally written
* by Todd C. Miller (see below), which was carried out by Th. Glaser
* as well as writing wcslcat() and wcslcpy() equivalents.
*/
#include <sys/types.h>
#if defined(_KERNEL) || defined(_STANDALONE)
#include <lib/libkern/libkern.h>
#undef HAVE_STRLCPY
#undef HAVE_STRLCAT
#else
#ifdef HAVE_CONFIG_H /* usually when packaged with third-party software */
#ifdef CONFIG_H_FILENAME
#include CONFIG_H_FILENAME
#else
#include "config.h"
#endif
#endif
extern size_t strlen(const char *);
#endif
#ifndef __RCSID
#undef __IDSTRING
#undef __IDSTRING_CONCAT
#undef __IDSTRING_EXPAND
#if defined(__ELF__) && defined(__GNUC__)
#define __IDSTRING(prefix, string) \
__asm__(".section .comment" \
"\n .ascii \"@(\"\"#)" #prefix ": \"" \
"\n .asciz \"" string "\"" \
"\n .previous")
#else
#define __IDSTRING_CONCAT(l,p) __LINTED__ ## l ## _ ## p
#define __IDSTRING_EXPAND(l,p) __IDSTRING_CONCAT(l,p)
#define __IDSTRING(prefix, string) \
static const char __IDSTRING_EXPAND(__LINE__,prefix) [] \
__attribute__((used)) = "@(""#)" #prefix ": " string
#endif
#define __RCSID(x) __IDSTRING(rcsid,x)
#endif
#ifndef __predict_true
#define __predict_true(exp) ((exp) != 0)
#endif
#ifndef __predict_false
#define __predict_false(exp) ((exp) != 0)
#endif
__RCSID("$MirOS: src/bin/mksh/strlfun.c,v 1.4 2006/11/08 22:54:55 tg Exp $");
size_t strlcat(char *, const char *, size_t);
size_t strlcpy(char *, const char *, size_t);
#ifndef HAVE_STRLCAT
/*
* 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 dlen)
{
size_t n = 0, slen;
slen = strlen(src);
while (__predict_true(n + 1 < dlen && dst[n] != '\0'))
++n;
if (__predict_false(dlen == 0 || dst[n] != '\0'))
return (dlen + slen);
while (__predict_true((slen > 0) && (n < (dlen - 1)))) {
dst[n++] = *src++;
--slen;
}
dst[n] = '\0';
return (n + slen);
}
#endif /* !HAVE_STRLCAT */
/* $OpenBSD: strlcpy.c,v 1.10 2005/08/08 08:05:37 espie Exp $ */
/*-
* Copyright (c) 2004, 2005, 2006 Thorsten Glaser <tg@mirbsd.de>
* Thanks to Bodo Eggert for optimisation hints
* 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.
*/
#if defined(_KERNEL) || defined(_STANDALONE)
# include <lib/libkern/libkern.h>
# undef HAVE_STRLCPY
# undef HAVE_STRLCAT
#else
# ifdef HAVE_CONFIG_H /* usually when packaged with third-party software */
# include "config.h"
# endif
# include <sys/types.h>
extern size_t strlen(const char *);
#ifndef __RCSID
#define __RCSID(x) static const char __rcsid[] = (x)
#endif
#ifndef __predict_false
#define __predict_false(exp) ((exp) != 0)
#endif
__RCSID("$MirOS: src/bin/mksh/strlfun.c,v 1.3 2006/08/01 13:43:28 tg Exp $");
#endif
size_t strlcat(char *, const char *, size_t);
size_t strlcpy(char *, const char *, size_t);
#ifndef HAVE_STRLCPY
/*
* Copy src to string dst of size siz. At most siz-1 characters
@@ -58,16 +123,16 @@ strlcpy(char *dst, const char *src, size_t siz)
{
const char *s = src;
if (__predict_false(!siz))
if (__predict_false(siz == 0))
goto traverse_src;
/* copy as many chars as will fit */
for (; --siz && (*dst++ = *s++); )
while (--siz && (*dst++ = *s++))
;
/* not enough room in dst */
if (__predict_false(!siz)) {
/* safe to NUL-terminate dst since copied <= siz-1 chars */
if (__predict_false(siz == 0)) {
/* safe to NUL-terminate dst since we copied <= siz-1 chars */
*dst = '\0';
traverse_src:
/* traverse rest of src */
@@ -79,39 +144,3 @@ strlcpy(char *dst, const char *src, size_t siz)
return (s - src - 1);
}
#endif /* !HAVE_STRLCPY */
#ifndef HAVE_STRLCAT
/*
* 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)
{
char *d = dst;
size_t dl, n = siz;
const size_t sl = strlen(src);
while (n-- && (*d++ != '\0'))
;
if (!++n && (*d != '\0'))
return (strlen(src));
dl = --d - dst; /* original strlen(dst), max. siz-1 */
n = siz - dl;
dl += sl;
if (__predict_false(!n--))
return (dl);
if (__predict_false(n > sl))
n = sl; /* number of chars to copy */
for (; n-- && (*d++ = *src++); )
;
*d = '\0'; /* NUL-terminate dst */
return (dl);
}
#endif /* !HAVE_STRLCAT */