ack/lang/cem/libcc.ansi/core/string/strtok.c
David Given d1cdb07719 Realise that the libc core can safely call other libc core functions, even if
they're not defined in the core: so putw() can call stdio stuff, for example.
So the earlier concept of pureness isn't necessary. Rename accordingly.
2018-06-21 23:24:23 +02:00

34 lines
614 B
C

/*
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
* See the copyright notice in the ACK home directory, in the file "Copyright".
*/
/* $Id$ */
#include <string.h>
char* strtok(register char* string, const char* separators)
{
register char *s1, *s2;
static char* savestring;
if (string == NULL)
{
string = savestring;
if (string == NULL)
return (char*)NULL;
}
s1 = string + strspn(string, separators);
if (*s1 == '\0')
{
savestring = NULL;
return (char*)NULL;
}
s2 = strpbrk(s1, separators);
if (s2 != NULL)
*s2++ = '\0';
savestring = s2;
return s1;
}