diff options
Diffstat (limited to 'lib/libc/string/strtok.c')
| -rw-r--r-- | lib/libc/string/strtok.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/lib/libc/string/strtok.c b/lib/libc/string/strtok.c new file mode 100644 index 0000000..1a29cc5 --- /dev/null +++ b/lib/libc/string/strtok.c @@ -0,0 +1,140 @@ +/*- + * Copyright (c) 1998 Softweyr LLC. All rights reserved. + * + * strtok_r, from Berkeley strtok + * Oct 13, 1998 by Wes Peters <wes@softweyr.com> + * + * 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)strtok.c 8.1 (Berkeley) 6/4/93"; +#endif /* LIBC_SCCS and not lint */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <stddef.h> +#ifdef DEBUG_STRTOK +#include <stdio.h> +#endif +#include <string.h> + +char *__strtok_r(char *, const char *, char **); + +__weak_reference(__strtok_r, strtok_r); + +char * +__strtok_r(char *s, const char *delim, char **last) +{ + char *spanp, *tok; + int c, sc; + + 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 + s[-1] = '\0'; + *last = s; + return (tok); + } + } while (sc != 0); + } + /* NOTREACHED */ +} + +char * +strtok(char *s, const char *delim) +{ + static char *last; + + return (__strtok_r(s, delim, &last)); +} + +#ifdef DEBUG_STRTOK +/* + * Test the tokenizer. + */ +int +main(void) +{ + char blah[80], test[80]; + char *brkb, *brkt, *phrase, *sep, *word; + + sep = "\\/:;=-"; + phrase = "foo"; + + 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); + 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 */ |
