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contrib/mg/strndup.c
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/* $OpenBSD: strndup.c,v 1.3 2019/01/25 00:19:25 millert Exp $ */ | |||||
/* $OpenBSD: strnlen.c,v 1.9 2019/01/25 00:19:25 millert Exp $ */ | |||||
/* | |||||
* Copyright (c) 2010 Todd C. Miller <millert@openbsd.org> | |||||
* | |||||
* 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. | |||||
*/ | |||||
#include <stddef.h> | |||||
#include <stdlib.h> | |||||
#include <string.h> | |||||
#include "config.h" | |||||
#ifndef HAVE_STRNDUP | |||||
static size_t | |||||
strnlen(const char *str, size_t maxlen) | |||||
{ | |||||
const char *cp; | |||||
for (cp = str; maxlen != 0 && *cp != '\0'; cp++, maxlen--) | |||||
; | |||||
return (size_t)(cp - str); | |||||
} | |||||
char * | |||||
strndup(const char *str, size_t maxlen) | |||||
{ | |||||
char *copy; | |||||
size_t len; | |||||
len = strnlen(str, maxlen); | |||||
copy = malloc(len + 1); | |||||
if (copy != NULL) { | |||||
(void)memcpy(copy, str, len); | |||||
copy[len] = '\0'; | |||||
} | |||||
return copy; | |||||
} | |||||
#endif /* !HAVE_STRNDUP */ |