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-rw-r--r--lib/strtok.c120
1 files changed, 29 insertions, 91 deletions
diff --git a/lib/strtok.c b/lib/strtok.c
index 8c765d425..901042430 100644
--- a/lib/strtok.c
+++ b/lib/strtok.c
@@ -5,7 +5,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
- * Copyright (C) 2000, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 2001, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* In order to be useful for every potential user, curl and libcurl are
* dual-licensed under the MPL and the MIT/X-derivate licenses.
@@ -21,108 +21,46 @@
* $Id$
*****************************************************************************/
-
#include "setup.h"
#ifndef HAVE_STRTOK_R
-
-/*
- * Copyright (c) 1998 Softweyr LLC. All rights reserved.
- *
- * strtok_r, from Berkeley strtok
- * Oct 13, 1998 by Wes Peters <wes@softweyr.com>
- *
- * Copyright (c) 1988, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notices, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notices, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- *
- * This product includes software developed by Softweyr LLC, the
- * University of California, Berkeley, and its contributors.
- *
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY SOFTWEYR LLC, THE REGENTS AND CONTRIBUTORS
- * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
- * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SOFTWEYR LLC, THE
- * REGENTS, OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
- * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
#include <stddef.h>
char *
-Curl_strtok_r(char *s, const char *delim, char **last)
+Curl_strtok_r(char *ptr, const char *sep, char **end)
{
- char *spanp;
- int c, sc;
- char *tok;
+ if (!ptr)
+ /* we got NULL input so then we get our last position instead */
+ ptr = *end;
- if (s == NULL && (s = *last) == NULL) {
- return NULL;
- }
+ /* pass all letters that are including in the separator string */
+ while (*ptr && strchr(sep, *ptr))
+ ++ptr;
- /*
- * Skip (span) leading delimiters (s += strspn(s, delim), sort of).
- */
- cont:
- c = *s++;
- for (spanp = (char *)delim; (sc = *spanp++) != 0; ) {
- if (c == sc) {
- goto cont;
- }
- }
+ if (*ptr) {
+ /* so this is where the next piece of string starts */
+ char *start = ptr;
- if (c == 0) { /* no non-delimiter characters */
- *last = NULL;
- return NULL;
- }
- tok = s - 1;
-
- /*
- * Scan token (scan for delimiters: s += strcspn(s, delim), sort of).
- * Note that delim must have one NUL; we stop if we see that, too.
- */
- for (;;) {
- c = *s++;
- spanp = (char *)delim;
- do {
- if ((sc = *spanp++) == c) {
- if (c == 0) {
- s = NULL;
- }
- else {
- char *w = s - 1;
- *w = '\0';
- }
- *last = s;
- return tok;
- }
+ /* set the end pointer to the first byte after the start */
+ *end = ptr + 1;
+
+ /* scan through the string to find where it ends, it ends on a
+ null byte or a character that exists in the separator string */
+ while (**end && !strchr(sep, **end))
+ ++*end;
+
+ if (**end) {
+ /* the end is not a null byte */
+ **end = '\0';, /* zero terminate it! */
+ ++*end; /* advance the last pointer to beyond the null byte */
}
- while (sc != 0);
+
+ return start; /* return the position where the string starts */
}
- /* NOTREACHED */
+
+ /* we ended up on a null byte, there are no more strings to find! */
+ return NULL;
}
-#endif
+#endif /* this was only compiled if strtok_r wasn't present */