mirror of
https://github.com/cc65/cc65.git
synced 2024-12-23 04:30:10 +00:00
78 lines
1.6 KiB
C
78 lines
1.6 KiB
C
/*
|
|
* strtok.c
|
|
*
|
|
* Ullrich von Bassewitz, 11.12.1998
|
|
*/
|
|
|
|
|
|
|
|
#include <string.h>
|
|
|
|
|
|
|
|
/*****************************************************************************/
|
|
/* Data */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
/* Memory location that holds the last input */
|
|
static char* Last = 0;
|
|
|
|
|
|
|
|
/*****************************************************************************/
|
|
/* Code */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
char* __fastcall__ strtok (register char* s1, const char* s2)
|
|
{
|
|
char c;
|
|
char* start;
|
|
|
|
/* Use the stored location if called with a NULL pointer */
|
|
if (s1 == 0) {
|
|
s1 = Last;
|
|
}
|
|
|
|
/* If s1 is empty, there are no more tokens. Return 0 in this case. */
|
|
if (*s1 == '\0') {
|
|
return 0;
|
|
}
|
|
|
|
/* Search the address of the first element in s1 that equals none
|
|
* of the characters in s2.
|
|
*/
|
|
while ((c = *s1) && strchr (s2, c) != 0) {
|
|
++s1;
|
|
}
|
|
if (c == '\0') {
|
|
/* No more tokens found */
|
|
Last = s1;
|
|
return 0;
|
|
}
|
|
|
|
/* Remember the start of the token */
|
|
start = s1;
|
|
|
|
/* Search for the end of the token */
|
|
while ((c = *s1) && strchr (s2, c) == 0) {
|
|
++s1;
|
|
}
|
|
if (c == '\0') {
|
|
/* Last element */
|
|
Last = s1;
|
|
} else {
|
|
*s1 = '\0';
|
|
Last = s1 + 1;
|
|
}
|
|
|
|
/* Return the start of the token */
|
|
return start;
|
|
}
|
|
|
|
|
|
|