1 /*- 2 * Copyright (c) 1998 Softweyr LLC. All rights reserved. 3 * 4 * strtok_r, from Berkeley strtok 5 * Oct 13, 1998 by Wes Peters <wes@softweyr.com> 6 * 7 * Copyright (c) 1988, 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notices, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notices, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY SOFTWEYR LLC, THE REGENTS AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 25 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SOFTWEYR LLC, THE 26 * REGENTS, OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 28 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 29 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 30 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 31 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 32 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #if defined(LIBC_SCCS) && !defined(lint) 36 static char sccsid[] = "@(#)strtok.c 8.1 (Berkeley) 6/4/93"; 37 #endif /* LIBC_SCCS and not lint */ 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include <stddef.h> 42 #ifdef DEBUG_STRTOK 43 #include <stdio.h> 44 #endif 45 #include <string.h> 46 47 char *__strtok_r(char *, const char *, char **); 48 49 __weak_reference(__strtok_r, strtok_r); 50 51 char * 52 __strtok_r(char *s, const char *delim, char **last) 53 { 54 char *spanp, *tok; 55 int c, sc; 56 57 if (s == NULL && (s = *last) == NULL) 58 return (NULL); 59 60 /* 61 * Skip (span) leading delimiters (s += strspn(s, delim), sort of). 62 */ 63 cont: 64 c = *s++; 65 for (spanp = (char *)delim; (sc = *spanp++) != 0;) { 66 if (c == sc) 67 goto cont; 68 } 69 70 if (c == 0) { /* no non-delimiter characters */ 71 *last = NULL; 72 return (NULL); 73 } 74 tok = s - 1; 75 76 /* 77 * Scan token (scan for delimiters: s += strcspn(s, delim), sort of). 78 * Note that delim must have one NUL; we stop if we see that, too. 79 */ 80 for (;;) { 81 c = *s++; 82 spanp = (char *)delim; 83 do { 84 if ((sc = *spanp++) == c) { 85 if (c == 0) 86 s = NULL; 87 else 88 s[-1] = '\0'; 89 *last = s; 90 return (tok); 91 } 92 } while (sc != 0); 93 } 94 /* NOTREACHED */ 95 } 96 97 char * 98 strtok(char *s, const char *delim) 99 { 100 static char *last; 101 102 return (__strtok_r(s, delim, &last)); 103 } 104 105 #ifdef DEBUG_STRTOK 106 /* 107 * Test the tokenizer. 108 */ 109 int 110 main(void) 111 { 112 char blah[80], test[80]; 113 char *brkb, *brkt, *phrase, *sep, *word; 114 115 sep = "\\/:;=-"; 116 phrase = "foo"; 117 118 printf("String tokenizer test:\n"); 119 strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function."); 120 for (word = strtok(test, sep); word; word = strtok(NULL, sep)) 121 printf("Next word is \"%s\".\n", word); 122 strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function."); 123 124 for (word = strtok_r(test, sep, &brkt); word; 125 word = strtok_r(NULL, sep, &brkt)) { 126 strcpy(blah, "blah:blat:blab:blag"); 127 128 for (phrase = strtok_r(blah, sep, &brkb); phrase; 129 phrase = strtok_r(NULL, sep, &brkb)) 130 printf("So far we're at %s:%s\n", word, phrase); 131 } 132 133 return (0); 134 } 135 136 #endif /* DEBUG_STRTOK */ 137