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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY SOFTWEYR LLC, THE REGENTS AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 25 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SOFTWEYR LLC, THE 26 * REGENTS, OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 28 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 29 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 30 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 31 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 32 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 * 34 * From: @(#)strtok.c 8.1 (Berkeley) 6/4/93 35 */ 36 37 #ifdef HAVE_CONFIG_H 38 #include <config.h> 39 #endif 40 41 #include "portability.h" 42 43 char * 44 pcap_strtok_r(char *s, const char *delim, char **last) 45 { 46 char *spanp, *tok; 47 int c, sc; 48 49 if (s == NULL && (s = *last) == NULL) 50 return (NULL); 51 52 /* 53 * Skip (span) leading delimiters (s += strspn(s, delim), sort of). 54 */ 55 cont: 56 c = *s++; 57 for (spanp = (char *)delim; (sc = *spanp++) != 0;) { 58 if (c == sc) 59 goto cont; 60 } 61 62 if (c == 0) { /* no non-delimiter characters */ 63 *last = NULL; 64 return (NULL); 65 } 66 tok = s - 1; 67 68 /* 69 * Scan token (scan for delimiters: s += strcspn(s, delim), sort of). 70 * Note that delim must have one NUL; we stop if we see that, too. 71 */ 72 for (;;) { 73 c = *s++; 74 spanp = (char *)delim; 75 do { 76 if ((sc = *spanp++) == c) { 77 if (c == 0) 78 s = NULL; 79 else 80 s[-1] = '\0'; 81 *last = s; 82 return (tok); 83 } 84 } while (sc != 0); 85 } 86 /* NOTREACHED */ 87 } 88