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src/seeder/strlcpy.h
- This file was added.
/* | |||||
* 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. | |||||
*/ | |||||
#ifndef BITCOIN_STRLCPY_H | |||||
#define BITCOIN_STRLCPY_H | |||||
#include <stdlib.h> | |||||
#include <string.h> | |||||
/* | |||||
* 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. | |||||
*/ | |||||
inline size_t strlcpy(char *dst, const char *src, size_t siz) { | |||||
char *d = dst; | |||||
const char *s = src; | |||||
size_t n = siz; | |||||
/* Copy as many bytes as will fit */ | |||||
if (n != 0) { | |||||
while (--n != 0) { | |||||
if ((*d++ = *s++) == '\0') break; | |||||
} | |||||
} | |||||
/* Not enough room in dst, add NUL and traverse rest of src */ | |||||
if (n == 0) { | |||||
if (siz != 0) *d = '\0'; /* NUL-terminate dst */ | |||||
while (*s++) | |||||
; | |||||
} | |||||
return (s - src - 1); /* count does not include NUL */ | |||||
} | |||||
/* | |||||
* 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. | |||||
*/ | |||||
inline size_t strlcat(char *dst, const char *src, size_t siz) { | |||||
char *d = dst; | |||||
const char *s = src; | |||||
size_t n = siz; | |||||
size_t dlen; | |||||
/* Find the end of dst and adjust bytes left but don't go past end */ | |||||
while (n-- != 0 && *d != '\0') | |||||
d++; | |||||
dlen = d - dst; | |||||
n = siz - dlen; | |||||
if (n == 0) return (dlen + strlen(s)); | |||||
while (*s != '\0') { | |||||
if (n != 1) { | |||||
*d++ = *s; | |||||
n--; | |||||
} | |||||
s++; | |||||
} | |||||
*d = '\0'; | |||||
return (dlen + (s - src)); /* count does not include NUL */ | |||||
} | |||||
#endif |