mirror of
https://github.com/jart/cosmopolitan.git
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62 lines
3.3 KiB
C
62 lines
3.3 KiB
C
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ This is free and unencumbered software released into the public domain. │
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│ │
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│ Anyone is free to copy, modify, publish, use, compile, sell, or │
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│ distribute this software, either in source code form or as a compiled │
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│ binary, for any purpose, commercial or non-commercial, and by any │
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│ means. │
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│ │
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│ In jurisdictions that recognize copyright laws, the author or authors │
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│ of this software dedicate any and all copyright interest in the │
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│ software to the public domain. We make this dedication for the benefit │
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│ of the public at large and to the detriment of our heirs and │
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│ successors. We intend this dedication to be an overt act of │
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│ relinquishment in perpetuity of all present and future rights to this │
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│ software under copyright law. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
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│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
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│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
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│ IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR │
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│ OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, │
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│ ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR │
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│ OTHER DEALINGS IN THE SOFTWARE. │
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│ │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/str/str.h"
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/**
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* Extracts non-empty tokens from string.
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*
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* @param s is mutated and should be NULL on subsequent calls
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* @param sep is a NUL-terminated set of wchars to consider separators
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* @param state tracks progress between calls
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* @return pointer to next token or NULL for end
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*/
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wchar_t *wcstok(wchar_t *s, const wchar_t *sep, wchar_t **state) {
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size_t leadingseps, tokenlen;
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if (!s) {
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s = *state;
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if (!s) {
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return NULL;
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}
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}
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leadingseps = wcsspn(s, sep);
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s += leadingseps;
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if (*s) {
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tokenlen = wcscspn(s, sep);
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if (s[tokenlen]) {
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s[tokenlen] = L'\0';
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*state = &s[tokenlen + 1];
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return s;
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} else if (tokenlen) {
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s[tokenlen] = L'\0';
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*state = NULL;
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return s;
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}
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}
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return (*state = NULL);
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}
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