/* * Copyright (c) 1998 Softweyr LLC. All rights reserved. * * strtok_r, from Berkeley strtok * Oct 13, 1998 by Wes Peters * * Copyright (c) 1988, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notices, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notices, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * * This product includes software developed by Softweyr LLC, the * University of California, Berkeley, and its contributors. * * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY SOFTWEYR LLC, THE REGENTS AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SOFTWEYR LLC, THE * REGENTS, OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef lint static const char rcsid[] = "$FreeBSD: src/lib/libc/string/strtok.c,v 1.2.6.1 2001/07/09 23:30:07 obrien Exp $"; #endif #include #include char * strtok_r(char *s, const char *delim, char **last) { char *spanp; int c, sc; char *tok; if (s == NULL && (s = *last) == NULL) { return NULL; } /* * Skip (span) leading delimiters (s += strspn(s, delim), sort of). */ cont: c = *s++; for (spanp = (char *)delim; (sc = *spanp++) != 0; ) { if (c == sc) { goto cont; } } if (c == 0) /* no non-delimiter characters */ { *last = NULL; return NULL; } tok = s - 1; /* * Scan token (scan for delimiters: s += strcspn(s, delim), sort of). * Note that delim must have one NUL; we stop if we see that, too. */ for (;;) { c = *s++; spanp = (char *)delim; do { if ((sc = *spanp++) == c) { if (c == 0) { s = NULL; } else { char *w = s - 1; *w = '\0'; } *last = s; return tok; } } while (sc != 0); } /* NOTREACHED */ } #if 0 char * strtok(char *s, const char *delim) { static char *last; return strtok_r(s, delim, &last); } #endif #if defined(DEBUG_STRTOK) /* * Test the tokenizer. */ int main() { char test[80], blah[80]; char *sep = "\\/:;=-"; char *word, *phrase, *brkt, *brkb; printf("String tokenizer test:\n"); strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function."); for (word = strtok(test, sep); word; word = strtok(NULL, sep)) { printf("Next word is \"%s\".\n", word); } phrase = "foo"; strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function."); for (word = strtok_r(test, sep, &brkt); word; word = strtok_r(NULL, sep, &brkt)) { strcpy(blah, "blah:blat:blab:blag"); for (phrase = strtok_r(blah, sep, &brkb); phrase; phrase = strtok_r(NULL, sep, &brkb)) { printf("So far we're at %s:%s\n", word, phrase); } } return 0; } #endif /* DEBUG_STRTOK */