From b15b51c1062a9068e3e8b45e0d73819e6947b7bf Mon Sep 17 00:00:00 2001 From: tg Date: Mon, 23 May 2005 16:43:20 +0000 Subject: [PATCH] Initial revision --- strlfun.c | 113 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 strlfun.c diff --git a/strlfun.c b/strlfun.c new file mode 100644 index 0000000..f8f72e6 --- /dev/null +++ b/strlfun.c @@ -0,0 +1,113 @@ +/** $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 + * Some hints for optimisation from Bodo Eggert (via d.a.s.r) + * Copyright (c) 1998 Todd C. Miller + * + * 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 + +#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 +#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 */