1 /*
2 * strsep() implementation for systems that don't have it.
3 *
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31 #define NO_STRING_INLINES
32 #include "util.h"
33
34
35 #if defined(LIBC_SCCS) && !defined(lint)
36 static char sccsid[] = "@(#)strsep.c 8.1 (Berkeley) 6/4/93";
37 #endif /* LIBC_SCCS and not lint */
38
39 #ifdef HAVE_STRSEP
40 #undef yasm__strsep
41 #endif
42
43 /*
44 * Get next token from string *stringp, where tokens are possibly-empty
45 * strings separated by characters from delim.
46 *
47 * Writes NULs into the string at *stringp to end tokens.
48 * delim need not remain constant from call to call.
49 * On return, *stringp points past the last NUL written (if there might
50 * be further tokens), or is NULL (if there are definitely no more tokens).
51 *
52 * If *stringp is NULL, strsep returns NULL.
53 */
54 /*@-nullstate@*/
55 char *
yasm__strsep(char ** stringp,const char * delim)56 yasm__strsep(char **stringp, const char *delim)
57 {
58 #ifdef HAVE_STRSEP
59 return strsep(stringp, delim);
60 #else
61 register char *s;
62 register const char *spanp;
63 register int c, sc;
64 char *tok;
65
66 if ((s = *stringp) == NULL)
67 return (NULL);
68 for (tok = s;;) {
69 c = *s++;
70 spanp = delim;
71 do {
72 if ((sc = *spanp++) == c) {
73 if (c == 0)
74 s = NULL;
75 else
76 s[-1] = 0;
77 *stringp = s;
78 return (tok);
79 }
80 } while (sc != 0);
81 }
82 /* NOTREACHED */
83 #endif
84 }
85 /*@=nullstate@*/
86