strtok.c

MIPS下的boottloader yamon 的源代码

/************************************************************************
 *
 *  strtok.c
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#include <string.h>

char *strtok(
	char 	*s1, 
	char 	*s2)
{
	char	*p;
	char	c;
	static   char	*lasts;
	
	if (s1 == 0) s1 = lasts;
	if (s1 == 0) return 0;
	
	while (c = *s1) {
		if (!strchr(s2, c)) break;
		s1++;
	}
	
	if (c == '\0') {
		lasts = 0;
		return 0;
	}

	for (p=s1; c = *++p;)
		if (strchr(s2, c)) break;
		
	if (c == '\0')
		lasts = 0;
	else {
		*p++ = '\0';
		lasts = p;
	}
	return s1;
}