a1aff7e194
• fix file description, history, etc. • require <stddef.h> for portable size_t declaration (if ! kernel, bootloader) • mention why we do _not_ include <string.h> (for building on obsd/mbsd) • sync RCSID definition with that of mksh (more portable) • fix strlcat description • sync strlcpy obsd rcsid and licence header with obsd-current (their code change 1.10→1.11 was something we already did) • use “does not”, not “doesn’t” • make it easier to produce wcslfun.c libc wcslfun.c: • sync with strlfun.c (much easier now) mksh strlcpy.c: • sync with strlfun.c (in comments, mostly) no binary changes
68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
/*-
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* Copyright (c) 2006, 2008
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* Thorsten Glaser <tg@mirbsd.org>
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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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* 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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#include "sh.h"
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__RCSID("$MirOS: src/bin/mksh/strlcpy.c,v 1.3 2008/07/07 12:59:54 tg Stab $");
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__RCSID("$miros: src/lib/libc/string/strlfun.c,v 1.16 2008/07/07 12:59:51 tg Stab $");
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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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/* (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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* 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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if (__predict_false(siz == 0))
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goto traverse_src;
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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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/* 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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/* count does not include NUL */
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return (s - src - 1);
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}
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