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