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 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notices, this list of conditions and the following disclaimer. 16 * 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notices, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * 24 * This product includes software developed by Softweyr LLC, the 25 * University of California, Berkeley, and its contributors. 26 * 27 * 4. Neither the name of the University nor the names of its contributors 28 * may be used to endorse or promote products derived from this software 29 * without specific prior written permission. 30 * 31 * THIS SOFTWARE IS PROVIDED BY SOFTWEYR LLC, THE REGENTS AND CONTRIBUTORS 32 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 34 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SOFTWEYR LLC, THE 35 * REGENTS, OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 36 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 37 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 38 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 39 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 40 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 41 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 42 * 43 * $FreeBSD: src/lib/libc/string/strtok.c,v 1.2.6.1 2001/07/09 23:30:07 obrien Exp $ 44 * $DragonFly: src/lib/libc/string/strtok.c,v 1.3 2005/04/28 13:25:12 joerg Exp $ 45 */ 46 47 #include <stddef.h> 48 #include <string.h> 49 50 char * 51 strtok_r(char *s, const char *delim, char **last) 52 { 53 const char *spanp; 54 int c, sc; 55 char *tok; 56 57 if (s == NULL && (s = *last) == NULL) 58 { 59 return NULL; 60 } 61 62 /* 63 * Skip (span) leading delimiters (s += strspn(s, delim), sort of). 64 */ 65 cont: 66 c = *s++; 67 for (spanp = delim; (sc = *spanp++) != 0; ) 68 { 69 if (c == sc) 70 { 71 goto cont; 72 } 73 } 74 75 if (c == 0) /* no non-delimiter characters */ 76 { 77 *last = NULL; 78 return NULL; 79 } 80 tok = s - 1; 81 82 /* 83 * Scan token (scan for delimiters: s += strcspn(s, delim), sort of). 84 * Note that delim must have one NUL; we stop if we see that, too. 85 */ 86 for (;;) 87 { 88 c = *s++; 89 spanp = delim; 90 do 91 { 92 if ((sc = *spanp++) == c) 93 { 94 if (c == 0) 95 { 96 s = NULL; 97 } 98 else 99 { 100 char *w = s - 1; 101 *w = '\0'; 102 } 103 *last = s; 104 return tok; 105 } 106 } 107 while (sc != 0); 108 } 109 /* NOTREACHED */ 110 } 111 112 113 char * 114 strtok(char *s, const char *delim) 115 { 116 static char *last; 117 118 return strtok_r(s, delim, &last); 119 } 120 121 122 #if defined(DEBUG_STRTOK) 123 124 /* 125 * Test the tokenizer. 126 */ 127 int 128 main() 129 { 130 char test[80], blah[80]; 131 char *sep = "\\/:;=-"; 132 char *word, *phrase, *brkt, *brkb; 133 134 printf("String tokenizer test:\n"); 135 136 strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function."); 137 138 for (word = strtok(test, sep); 139 word; 140 word = strtok(NULL, sep)) 141 { 142 printf("Next word is \"%s\".\n", word); 143 } 144 145 phrase = "foo"; 146 147 strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function."); 148 149 for (word = strtok_r(test, sep, &brkt); 150 word; 151 word = strtok_r(NULL, sep, &brkt)) 152 { 153 strcpy(blah, "blah:blat:blab:blag"); 154 155 for (phrase = strtok_r(blah, sep, &brkb); 156 phrase; 157 phrase = strtok_r(NULL, sep, &brkb)) 158 { 159 printf("So far we're at %s:%s\n", word, phrase); 160 } 161 } 162 163 return 0; 164 } 165 166 #endif /* DEBUG_STRTOK */ 167