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 * 1. Redistributions of source code must retain the above copyright 14 * notices, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notices, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Softweyr LLC, the 21 * University of California, Berkeley, and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY SOFTWEYR LLC, THE REGENTS AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 28 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 29 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SOFTWEYR LLC, THE 30 * REGENTS, OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 31 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 32 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 33 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 34 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 35 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 36 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #if 0 43 #if defined(LIBC_SCCS) && !defined(lint) 44 static char sccsid[] = "@(#)strtok.c 8.1 (Berkeley) 6/4/93"; 45 #endif /* LIBC_SCCS and not lint */ 46 #endif 47 48 #include <stddef.h> 49 #ifdef DEBUG_STRTOK 50 #include <stdio.h> 51 #endif 52 #include <string.h> 53 54 char * 55 strtok_r(char *s, const char *delim, char **last) 56 { 57 char *spanp, *tok; 58 int c, sc; 59 60 if (s == NULL && (s = *last) == NULL) 61 return (NULL); 62 63 /* 64 * Skip (span) leading delimiters (s += strspn(s, delim), sort of). 65 */ 66 cont: 67 c = *s++; 68 for (spanp = (char *)delim; (sc = *spanp++) != 0;) { 69 if (c == sc) 70 goto cont; 71 } 72 73 if (c == 0) { /* no non-delimiter characters */ 74 *last = NULL; 75 return (NULL); 76 } 77 tok = s - 1; 78 79 /* 80 * Scan token (scan for delimiters: s += strcspn(s, delim), sort of). 81 * Note that delim must have one NUL; we stop if we see that, too. 82 */ 83 for (;;) { 84 c = *s++; 85 spanp = (char *)delim; 86 do { 87 if ((sc = *spanp++) == c) { 88 if (c == 0) 89 s = NULL; 90 else 91 s[-1] = '\0'; 92 *last = s; 93 return (tok); 94 } 95 } while (sc != 0); 96 } 97 /* NOTREACHED */ 98 } 99 100 char * 101 strtok(char *s, const char *delim) 102 { 103 static char *last; 104 105 return (strtok_r(s, delim, &last)); 106 } 107 108 #ifdef DEBUG_STRTOK 109 /* 110 * Test the tokenizer. 111 */ 112 int 113 main(void) 114 { 115 char blah[80], test[80]; 116 char *brkb, *brkt, *phrase, *sep, *word; 117 118 sep = "\\/:;=-"; 119 phrase = "foo"; 120 121 printf("String tokenizer test:\n"); 122 strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function."); 123 for (word = strtok(test, sep); word; word = strtok(NULL, sep)) 124 printf("Next word is \"%s\".\n", word); 125 strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function."); 126 127 for (word = strtok_r(test, sep, &brkt); word; 128 word = strtok_r(NULL, sep, &brkt)) { 129 strcpy(blah, "blah:blat:blab:blag"); 130 131 for (phrase = strtok_r(blah, sep, &brkb); phrase; 132 phrase = strtok_r(NULL, sep, &brkb)) 133 printf("So far we're at %s:%s\n", word, phrase); 134 } 135 136 return (0); 137 } 138 139 #endif /* DEBUG_STRTOK */ 140