剑网三转阵营问题:ANSI C 的strtok的实现

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/*
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
* See the copyright notice in the ACK home directory, in the file "Copyright".
*/
/* $Header: strtok.c,v 1.2 90/08/28 13:54:38 eck Exp $ */
#include    
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;
}
/* * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands. * See the copyright notice in the ACK home directory, in the file "Copyright". */ /* $Header: strtok.c,v 1.2 90/08/28 13:54:38 eck Exp $ */ #include 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; }