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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Softweyr LLC, the 21 * University of California, Berkeley, and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY SOFTWEYR LLC, THE REGENTS AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 28 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 29 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SOFTWEYR LLC, THE 30 * REGENTS, OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 31 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 32 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 33 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 34 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 35 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 36 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #if defined(LIBC_SCCS) && !defined(lint) 40 static char sccsid[] = "@(#)strtok.c 8.1 (Berkeley) 6/4/93"; 41 #endif /* LIBC_SCCS and not lint */ 42 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD$"); 44 45 #include <stddef.h> 46 #ifdef DEBUG_STRTOK 47 #include <stdio.h> 48 #endif 49 #include <string.h> 50 51 char *__strtok_r(char *, const char *, char **); 52 53 __weak_reference(__strtok_r, strtok_r); 54 55 char * 56 __strtok_r(char *s, const char *delim, char **last) 57 { 58 char *spanp, *tok; 59 int c, sc; 60 61 if (s == NULL && (s = *last) == NULL) 62 return (NULL); 63 64 /* 65 * Skip (span) leading delimiters (s += strspn(s, delim), sort of). 66 */ 67 cont: 68 c = *s++; 69 for (spanp = (char *)delim; (sc = *spanp++) != 0;) { 70 if (c == sc) 71 goto cont; 72 } 73 74 if (c == 0) { /* no non-delimiter characters */ 75 *last = NULL; 76 return (NULL); 77 } 78 tok = s - 1; 79 80 /* 81 * Scan token (scan for delimiters: s += strcspn(s, delim), sort of). 82 * Note that delim must have one NUL; we stop if we see that, too. 83 */ 84 for (;;) { 85 c = *s++; 86 spanp = (char *)delim; 87 do { 88 if ((sc = *spanp++) == c) { 89 if (c == 0) 90 s = NULL; 91 else 92 s[-1] = '\0'; 93 *last = s; 94 return (tok); 95 } 96 } while (sc != 0); 97 } 98 /* NOTREACHED */ 99 } 100 101 char * 102 strtok(char *s, const char *delim) 103 { 104 static char *last; 105 106 return (__strtok_r(s, delim, &last)); 107 } 108 109 #ifdef DEBUG_STRTOK 110 /* 111 * Test the tokenizer. 112 */ 113 int 114 main(void) 115 { 116 char blah[80], test[80]; 117 char *brkb, *brkt, *phrase, *sep, *word; 118 119 sep = "\\/:;=-"; 120 phrase = "foo"; 121 122 printf("String tokenizer test:\n"); 123 strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function."); 124 for (word = strtok(test, sep); word; word = strtok(NULL, sep)) 125 printf("Next word is \"%s\".\n", word); 126 strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function."); 127 128 for (word = strtok_r(test, sep, &brkt); word; 129 word = strtok_r(NULL, sep, &brkt)) { 130 strcpy(blah, "blah:blat:blab:blag"); 131 132 for (phrase = strtok_r(blah, sep, &brkb); phrase; 133 phrase = strtok_r(NULL, sep, &brkb)) 134 printf("So far we're at %s:%s\n", word, phrase); 135 } 136 137 return (0); 138 } 139 140 #endif /* DEBUG_STRTOK */ 141