1 /* 2 * Copyright (c) 1998 Softweyr LLC. All rights reserved. 3 * 4 * strtok_r, from Berkeley strtok 5 * Oct 13, 1998 by Wes Peters <[email protected]> 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 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notices, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notices, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by Softweyr LLC, the 22 * University of California, Berkeley, and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY SOFTWEYR LLC, THE REGENTS AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 30 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SOFTWEYR LLC, THE 31 * REGENTS, OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 32 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 33 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 34 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 35 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 36 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 37 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 #include <sys/cdefs.h> 41 __FBSDID("$FreeBSD$"); 42 43 #include <stddef.h> 44 #ifdef DEBUG_STRTOK 45 #include <stdio.h> 46 #endif 47 #include <string.h> 48 49 char * 50 strtok_r(char *s, const char *delim, char **last) 51 { 52 int c, sc; 53 char *spanp, *tok, *w; 54 55 if (s == NULL && (s = *last) == NULL) 56 return (NULL); 57 58 /* 59 * Skip (span) leading delimiters (s += strspn(s, delim), sort of). 60 */ 61 cont: 62 c = *s++; 63 for (spanp = (char *)delim; (sc = *spanp++) != 0;) 64 if (c == sc) 65 goto cont; 66 67 if (c == 0) { /* no non-delimiter characters */ 68 *last = NULL; 69 return (NULL); 70 } 71 tok = s - 1; 72 73 /* 74 * Scan token (scan for delimiters: s += strcspn(s, delim), sort of). 75 * Note that delim must have one NUL; we stop if we see that, too. 76 */ 77 for (;;) { 78 c = *s++; 79 spanp = (char *)delim; 80 do { 81 if ((sc = *spanp++) == c) { 82 if (c == 0) 83 s = NULL; 84 else { 85 w = s - 1; 86 *w = '\0'; 87 } 88 *last = s; 89 return (tok); 90 } 91 } while (sc != 0); 92 } 93 /* NOTREACHED */ 94 } 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 } 104 105 106 #ifdef DEBUG_STRTOK 107 /* 108 * Test the tokenizer. 109 */ 110 int 111 main(void) 112 { 113 char blah[80], test[80]; 114 char *brkb, *brkt, *phrase, *sep, *word; 115 116 sep = "\\/:;=-"; 117 phrase = "foo"; 118 119 printf("String tokenizer test:\n"); 120 strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function."); 121 for (word = strtok(test, sep); word; word = strtok(NULL, sep)) 122 printf("Next word is \"%s\".\n", word); 123 strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function."); 124 125 for (word = strtok_r(test, sep, &brkt); word; 126 word = strtok_r(NULL, sep, &brkt)) { 127 strcpy(blah, "blah:blat:blab:blag"); 128 129 for (phrase = strtok_r(blah, sep, &brkb); phrase; 130 phrase = strtok_r(NULL, sep, &brkb)) 131 printf("So far we're at %s:%s\n", word, phrase); 132 } 133 134 return (0); 135 } 136 137 #endif /* DEBUG_STRTOK */ 138