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tg 2005-05-23 16:43:22 +00:00
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commit 2d4ffced84
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strlfun.c
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/** $MirOS: src/bin/mksh/strlfun.c,v 1.1 2005/05/23 16:43:20 tg Exp $ */
/* $OpenBSD: strlcpy.c,v 1.8 2003/06/17 21:56:24 millert Exp $ */
/* $OpenBSD: strlcat.c,v 1.11 2003/06/17 21:56:24 millert Exp $ */
/*-
* Copyright (c) 2004, 2005 Thorsten "mirabile" Glaser <tg@66h.42h.de>
* Some hints for optimisation from Bodo Eggert (via d.a.s.r)
* 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)
#ifdef HAVE_CONFIG_H
/* usually when packaged with third-party software */
#include "config.h"
#define LIBC_SCCS
#endif
#include <sys/types.h>
#ifndef __RCSID
#define __RCSID(x) static const char __rcsid[] = (x)
#endif
__RCSID("$MirOS: src/bin/mksh/strlfun.c,v 1.1 2005/05/23 16:43:20 tg Exp $");
#else
#include <lib/libkern/libkern.h>
#undef HAVE_CONFIG_H
#endif
#ifndef HAVE_CONFIG_H
#undef HAVE_STRLCPY
#undef HAVE_STRLCAT
#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
* 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)
{
const char *s = src;
if (!siz) goto traverse_src;
/* Copy as many bytes as will fit */
for (; --siz && (*dst++ = *s++); /* nothing */)
;
/* Not enough room in dst, add NUL and traverse rest of src */
if (!siz) {
/* Save, since we've copied at max. (siz-1) characters */
*dst = '\0'; /* NUL-terminate dst */
traverse_src:
while (*s++)
;
}
return (s - src - 1); /* count does not include NUL */
}
#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 (!n--)
return dl;
if (n > sl)
n = sl; /* number of octets to copy */
for (; n-- && (*d++ = *src++); /* nothing */)
;
*d = '\0'; /* NUL-terminate dst */
return dl;
}
#endif /* !HAVE_STRLCAT */