mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
54 lines
2.6 KiB
C
54 lines
2.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or 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 "libc/str/str.h"
|
|
|
|
/**
|
|
* Extracts non-empty tokens from string.
|
|
*
|
|
* @param s is mutated and should be NULL on subsequent calls
|
|
* @param sep is a NUL-terminated set of bytes to consider separators
|
|
* @param state tracks progress between calls
|
|
* @return pointer to next token or NULL for end
|
|
* @see strsep() which is similar
|
|
* @asyncsignalsafe
|
|
*/
|
|
char *strtok_r(char *s, const char *sep, char **state) {
|
|
size_t leadingseps, tokenlen;
|
|
if (!s) {
|
|
s = *state;
|
|
if (!s) {
|
|
return NULL;
|
|
}
|
|
}
|
|
leadingseps = strspn(s, sep);
|
|
s += leadingseps;
|
|
if (*s) {
|
|
tokenlen = strcspn(s, sep);
|
|
if (s[tokenlen]) {
|
|
s[tokenlen] = '\0';
|
|
*state = &s[tokenlen + 1];
|
|
return s;
|
|
} else if (tokenlen) {
|
|
s[tokenlen] = '\0';
|
|
*state = NULL;
|
|
return s;
|
|
}
|
|
}
|
|
return (*state = NULL);
|
|
}
|