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 44 #ifndef lint 45 static const char rcsid[] = 46 "$FreeBSD$"; 47 #endif 48 49 #include <stddef.h> 50 #include <string.h> 51 52 char * 53 strtok_r(char *s, const char *delim, char **last) 54 { 55 char *spanp; 56 int c, sc; 57 char *tok; 58 59 if (s == NULL && (s = *last) == NULL) 60 { 61 return NULL; 62 } 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 { 71 if (c == sc) 72 { 73 goto cont; 74 } 75 } 76 77 if (c == 0) /* no non-delimiter characters */ 78 { 79 *last = NULL; 80 return NULL; 81 } 82 tok = s - 1; 83 84 /* 85 * Scan token (scan for delimiters: s += strcspn(s, delim), sort of). 86 * Note that delim must have one NUL; we stop if we see that, too. 87 */ 88 for (;;) 89 { 90 c = *s++; 91 spanp = (char *)delim; 92 do 93 { 94 if ((sc = *spanp++) == c) 95 { 96 if (c == 0) 97 { 98 s = NULL; 99 } 100 else 101 { 102 char *w = s - 1; 103 *w = '\0'; 104 } 105 *last = s; 106 return tok; 107 } 108 } 109 while (sc != 0); 110 } 111 /* NOTREACHED */ 112 } 113 114 115 char * 116 strtok(char *s, const char *delim) 117 { 118 static char *last; 119 120 return strtok_r(s, delim, &last); 121 } 122 123 124 #if defined(DEBUG_STRTOK) 125 126 /* 127 * Test the tokenizer. 128 */ 129 int 130 main() 131 { 132 char test[80], blah[80]; 133 char *sep = "\\/:;=-"; 134 char *word, *phrase, *brkt, *brkb; 135 136 printf("String tokenizer test:\n"); 137 138 strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function."); 139 140 for (word = strtok(test, sep); 141 word; 142 word = strtok(NULL, sep)) 143 { 144 printf("Next word is \"%s\".\n", word); 145 } 146 147 phrase = "foo"; 148 149 strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function."); 150 151 for (word = strtok_r(test, sep, &brkt); 152 word; 153 word = strtok_r(NULL, sep, &brkt)) 154 { 155 strcpy(blah, "blah:blat:blab:blag"); 156 157 for (phrase = strtok_r(blah, sep, &brkb); 158 phrase; 159 phrase = strtok_r(NULL, sep, &brkb)) 160 { 161 printf("So far we're at %s:%s\n", word, phrase); 162 } 163 } 164 165 return 0; 166 } 167 168 #endif /* DEBUG_STRTOK */ 169