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/* |
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* Copyright (c) 1988 Regents of the University of California. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#include <string.h> |
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char * |
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strtok(char *s, const char *delim) |
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{ |
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static char *last; |
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return strtok_r(s, delim, &last); |
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} |
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DEF_STRONG(strtok); |
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char * |
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strtok_r(char *s, const char *delim, char **last) |
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{ |
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const char *spanp; |
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int c, sc; |
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char *tok; |
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✓✓✓✓
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if (s == NULL && (s = *last) == NULL) |
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return (NULL); |
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/* |
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* Skip (span) leading delimiters (s += strspn(s, delim), sort of). |
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*/ |
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cont: |
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c = *s++; |
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✓✓ |
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for (spanp = delim; (sc = *spanp++) != 0;) { |
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✓✓ |
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if (c == sc) |
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goto cont; |
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} |
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✓✓ |
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if (c == 0) { /* no non-delimiter characters */ |
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*last = NULL; |
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return (NULL); |
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} |
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tok = s - 1; |
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/* |
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* Scan token (scan for delimiters: s += strcspn(s, delim), sort of). |
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* Note that delim must have one NUL; we stop if we see that, too. |
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*/ |
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for (;;) { |
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c = *s++; |
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spanp = delim; |
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do { |
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✓✓ |
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if ((sc = *spanp++) == c) { |
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✓✓ |
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if (c == 0) |
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s = NULL; |
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else |
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s[-1] = '\0'; |
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*last = s; |
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return (tok); |
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} |
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✓✓ |
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} while (sc != 0); |
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} |
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/* NOTREACHED */ |
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} |
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DEF_WEAK(strtok_r); |