67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
/*---------------------------------------------------------------------
|
|
I use the strl* functions for extracting and copying strings. These
|
|
are present in the BSD systems I use mostly, but are missing on
|
|
Linux, AIX, HP-UX, and maybe others. For this reason, I include
|
|
copies here.
|
|
|
|
Copyright (c) 1998, 2015 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.
|
|
--------------------------------------------------------------------*/
|
|
|
|
size_t bsd_strlcat(char *dst, const char *src, size_t dsize) {
|
|
const char *odst = dst;
|
|
const char *osrc = src;
|
|
size_t n = dsize;
|
|
size_t dlen;
|
|
|
|
/* Find the end of dst and adjust bytes left but don't go past end. */
|
|
while (n-- != 0 && *dst != '\0')
|
|
dst++;
|
|
dlen = dst - odst;
|
|
n = dsize - dlen;
|
|
|
|
if (n-- == 0)
|
|
return(dlen + strlen(src));
|
|
while (*src != '\0') {
|
|
if (n != 0) {
|
|
*dst++ = *src;
|
|
n--;
|
|
}
|
|
src++;
|
|
}
|
|
*dst = '\0';
|
|
return(dlen + (src - osrc)); /* count does not include NUL */
|
|
}
|
|
|
|
size_t bsd_strlcpy(char *dst, const char *src, size_t dsize) {
|
|
const char *osrc = src;
|
|
size_t nleft = dsize;
|
|
|
|
/* Copy as many bytes as will fit. */
|
|
if (nleft != 0) {
|
|
while (--nleft != 0) {
|
|
if ((*dst++ = *src++) == '\0')
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Not enough room in dst, add NUL and traverse rest of src. */
|
|
if (nleft == 0) {
|
|
if (dsize != 0)
|
|
*dst = '\0'; /* NUL-terminate dst */
|
|
while (*src++)
|
|
;
|
|
}
|
|
return(src - osrc - 1); /* count does not include NUL */
|
|
}
|