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 #if defined(LIBC_SCCS) && !defined(lint) 38 static char sccsid[] = "@(#)strtok.c 8.1 (Berkeley) 6/4/93"; 39 #endif /* LIBC_SCCS and not lint */ 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 *__strtok_r(char *, const char *, char **); 50 51 __weak_reference(__strtok_r, strtok_r); 52 53 char * 54 __strtok_r(char *s, const char *delim, char **last) 55 { 56 char *spanp, *tok; 57 int c, sc; 58 59 if (s == NULL && (s = *last) == NULL) 60 return (NULL); 61 62 /* 63 * Skip (span) leading delimiters (s += strspn(s, delim), sort of). 64 */ 65 cont: 66 c = *s++; 67 for (spanp = (char *)delim; (sc = *spanp++) != 0;) { 68 if (c == sc) 69 goto cont; 70 } 71 72 if (c == 0) { /* no non-delimiter characters */ 73 *last = NULL; 74 return (NULL); 75 } 76 tok = s - 1; 77 78 /* 79 * Scan token (scan for delimiters: s += strcspn(s, delim), sort of). 80 * Note that delim must have one NUL; we stop if we see that, too. 81 */ 82 for (;;) { 83 c = *s++; 84 spanp = (char *)delim; 85 do { 86 if ((sc = *spanp++) == c) { 87 if (c == 0) 88 s = NULL; 89 else 90 s[-1] = '\0'; 91 *last = s; 92 return (tok); 93 } 94 } while (sc != 0); 95 } 96 /* NOTREACHED */ 97 } 98 99 char * 100 strtok(char *s, const char *delim) 101 { 102 static char *last; 103 104 return (__strtok_r(s, delim, &last)); 105 } 106 107 #ifdef DEBUG_STRTOK 108 /* 109 * Test the tokenizer. 110 */ 111 int 112 main(void) 113 { 114 char blah[80], test[80]; 115 char *brkb, *brkt, *phrase, *sep, *word; 116 117 sep = "\\/:;=-"; 118 phrase = "foo"; 119 120 printf("String tokenizer test:\n"); 121 strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function."); 122 for (word = strtok(test, sep); word; word = strtok(NULL, sep)) 123 printf("Next word is \"%s\".\n", word); 124 strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function."); 125 126 for (word = strtok_r(test, sep, &brkt); word; 127 word = strtok_r(NULL, sep, &brkt)) { 128 strcpy(blah, "blah:blat:blab:blag"); 129 130 for (phrase = strtok_r(blah, sep, &brkb); phrase; 131 phrase = strtok_r(NULL, sep, &brkb)) 132 printf("So far we're at %s:%s\n", word, phrase); 133 } 134 135 return (0); 136 } 137 138 #endif /* DEBUG_STRTOK */ 139