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Submitted by:	Joseph Mallett <jmallett@xmach.org>
Reviewed by:	md5(1)
This commit is contained in:
mike 2002-01-15 08:26:58 +00:00
parent b8d6599e4c
commit b87cdc2c64
1 changed files with 58 additions and 90 deletions
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148
lib/libc/string/strtok.c
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@ -13,17 +13,13 @@
*
* 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.
@ -50,117 +46,89 @@ __FBSDID("$FreeBSD$");
char *
strtok_r(char *s, const char *delim, char **last)
{
char *spanp;
int c, sc;
char *tok;
char *spanp;
int c, sc;
char *tok;
if (s == NULL && (s = *last) == NULL)
{
return NULL;
}
if (s == NULL && (s = *last) == NULL)
return (NULL);
/*
* Skip (span) leading delimiters (s += strspn(s, delim), sort of).
*/
/*
* 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 (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;
}
for (spanp = (char *)delim; (sc = *spanp++) != 0;)
if (c == sc)
goto cont;
if (c == 0) { /* no non-delimiter characters */
*last = NULL;
return (NULL);
}
while (sc != 0);
}
/* NOTREACHED */
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);
}
} while (sc != 0);
}
/* NOTREACHED */
}
char *
strtok(char *s, const char *delim)
{
static char *last;
static char *last;
return strtok_r(s, delim, &last);
return (strtok_r(s, delim, &last));
}
#if defined(DEBUG_STRTOK)
#ifdef DEBUG_STRTOK
/*
* Test the tokenizer.
*/
int
main()
main(void)
{
char test[80], blah[80];
char *sep = "\\/:;=-";
char *word, *phrase, *brkt, *brkb;
char test[80], blah[80];
char *sep = "\\/:;=-";
char *word, *phrase, *brkt, *brkb;
printf("String tokenizer test:\n");
printf("String tokenizer test:\n");
strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function.");
for (word = strtok(test, sep); word; word = strtok(NULL, sep))
printf("Next word is \"%s\".\n", word);
phrase = "foo";
strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function.");
strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function.");
for (word = strtok_r(test, sep, &brkt); word;
word = strtok_r(NULL, sep, &brkt)) {
strcpy(blah, "blah:blat:blab:blag");
for (word = strtok(test, sep);
word;
word = strtok(NULL, sep))
{
printf("Next word is \"%s\".\n", word);
}
phrase = "foo";
strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function.");
for (word = strtok_r(test, sep, &brkt);
word;
word = strtok_r(NULL, sep, &brkt))
{
strcpy(blah, "blah:blat:blab:blag");
for (phrase = strtok_r(blah, sep, &brkb);
phrase;
phrase = strtok_r(NULL, sep, &brkb))
{
printf("So far we're at %s:%s\n", word, phrase);
for (phrase = strtok_r(blah, sep, &brkb); phrase;
phrase = strtok_r(NULL, sep, &brkb))
printf("So far we're at %s:%s\n", word, phrase);
}
}
return 0;
return (0);
}
#endif /* DEBUG_STRTOK */