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/*- |
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* Copyright (c) 2006, 2008 |
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* Thorsten Glaser <tg@mirbsd.org> |
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* |
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* Provided that these terms and disclaimer and all copyright notices |
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* are retained or reproduced in an accompanying document, permission |
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* is granted to deal in this work without restriction, including un- |
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* limited rights to use, publicly perform, distribute, sell, modify, |
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* merge, give away, or sublicence. |
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* |
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* This work is provided "AS IS" and WITHOUT WARRANTY of any kind, to |
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* the utmost extent permitted by applicable law, neither express nor |
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* implied; without malicious intent or gross negligence. In no event |
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* may a licensor, author or contributor be held liable for indirect, |
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* direct, other damage, loss, or other issues arising in any way out |
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* of dealing in the work, even if advised of the possibility of such |
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* damage or existence of a defect, except proven that it results out |
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* of said person's immediate fault when using the work as intended. |
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*- |
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* The original implementations of strlcpy(3) and strlcat(3) are from |
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* Todd C. Miller; the licence is reproduced below. However, this ap- |
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* plies only to the strlcpy(3) portion of the code, as Thorsten Gla- |
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* ser write the following strlcat(3) implementation according to the |
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* spec. Both functions below have been optimised according to sugge- |
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* stions from Bodo Eggert. Thorsten Glaser also has merged this code |
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* with strxfrm(3) for ISO-10646-only systems and wrote the wide char |
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* variants wcslcat(3), wcslcpy(3), and wcsxfrm(3) (see wcslfun.c). |
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*/ |
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|
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#ifdef STRXFRM |
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#undef HAVE_STRLCPY |
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#undef HAVE_STRLCAT |
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#define HAVE_STRLCPY 0 |
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#define HAVE_STRLCAT 1 |
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#define strlcpy strxfrm |
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#endif |
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|
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#include <sys/types.h> |
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#if defined(_KERNEL) || defined(_STANDALONE) |
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#include <lib/libkern/libkern.h> |
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#undef HAVE_STRLCPY |
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#undef HAVE_STRLCAT |
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#else |
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#include <stddef.h> /* for size_t in user space (SUSv3) */ |
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#if defined(HAVE_CONFIG_H) && (HAVE_CONFIG_H != 0) |
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/* usually when packaged with third-party software */ |
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#ifdef CONFIG_H_FILENAME |
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#include CONFIG_H_FILENAME |
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#else |
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#include "config.h" |
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#endif |
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#endif |
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/* do not include <string.h> to prevent redefinition warnings */ |
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extern size_t strlen(const char *); |
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#endif |
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|
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#ifndef __RCSID |
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#undef __IDSTRING |
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#undef __IDSTRING_CONCAT |
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#undef __IDSTRING_EXPAND |
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#define __IDSTRING_CONCAT(l,p) __LINTED__ ## l ## _ ## p |
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#define __IDSTRING_EXPAND(l,p) __IDSTRING_CONCAT(l,p) |
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#define __IDSTRING(prefix, string) \ |
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static const char __IDSTRING_EXPAND(__LINE__,prefix) [] \ |
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__attribute__((used)) = "@(""#)" #prefix ": " string |
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#define __RCSID(x) __IDSTRING(rcsid,x) |
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#endif |
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|
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#ifndef __predict_true |
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#define __predict_true(exp) ((exp) != 0) |
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#endif |
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#ifndef __predict_false |
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#define __predict_false(exp) ((exp) != 0) |
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#endif |
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|
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#if !defined(_KERNEL) && !defined(_STANDALONE) |
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__RCSID("$MirOS: src/lib/libc/string/strlfun.c,v 1.18 2008/08/01 12:26:17 tg Exp $"); |
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#endif |
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|
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/* (multibyte) string functions */ |
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#undef NUL |
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#undef char_t |
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#define NUL '\0' |
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#define char_t char |
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|
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size_t strlcat(char_t *, const char_t *, size_t); |
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size_t strlcpy(char_t *, const char_t *, size_t); |
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|
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#if !defined(HAVE_STRLCAT) || (HAVE_STRLCAT == 0) |
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/* |
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* Appends src to string dst of size dlen (unlike strncat, dlen is the |
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* full size of dst, not space left). At most dlen-1 characters |
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* will be copied. Always NUL terminates (unless dlen <= strlen(dst)). |
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* Returns strlen(src) + MIN(dlen, strlen(initial dst)), without the |
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* trailing NUL byte counted. If retval >= dlen, truncation occurred. |
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*/ |
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size_t |
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strlcat(char_t *dst, const char_t *src, size_t dlen) |
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{ |
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size_t n = 0, slen; |
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|
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slen = strlen(src); |
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while (__predict_true(n + 1 < dlen && dst[n] != NUL)) |
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++n; |
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if (__predict_false(dlen == 0 || dst[n] != NUL)) |
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return (dlen + slen); |
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while (__predict_true((slen > 0) && (n < (dlen - 1)))) { |
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dst[n++] = *src++; |
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--slen; |
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} |
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dst[n] = NUL; |
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return (n + slen); |
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} |
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#endif /* !HAVE_STRLCAT */ |
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|
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#if !defined(HAVE_STRLCPY) || (HAVE_STRLCPY == 0) |
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/* $OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $ */ |
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|
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/*- |
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* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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|
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/* |
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* Copy src to string dst of size siz. At most siz-1 characters |
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* will be copied. Always NUL terminates (unless siz == 0). |
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* Returns strlen(src); if retval >= siz, truncation occurred. |
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*/ |
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size_t |
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strlcpy(char_t *dst, const char_t *src, size_t siz) |
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{ |
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const char_t *s = src; |
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|
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if (__predict_false(siz == 0)) |
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goto traverse_src; |
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|
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/* copy as many chars as will fit */ |
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while (--siz && (*dst++ = *s++)) |
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; |
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|
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/* not enough room in dst */ |
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if (__predict_false(siz == 0)) { |
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/* safe to NUL-terminate dst since we copied <= siz-1 chars */ |
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*dst = NUL; |
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traverse_src: |
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/* traverse rest of src */ |
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while (*s++) |
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; |
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} |
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|
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/* count does not include NUL */ |
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return (s - src - 1); |
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} |
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#endif /* !HAVE_STRLCPY */ |
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