scc

simple C compiler
git clone git://git.2f30.org/scc
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strtok.c (351B)

      1 #include <string.h>
      2 #undef strtok
      3 
      4 char *
      5 strtok(char * restrict s, const char * restrict delim)
      6 {
      7 	static char *line;
      8 
      9 	if (s)
     10 		line = s;
     11 	if (!s && !line)
     12 		return NULL;
     13 
     14 	s = line + strspn(line, delim);
     15 	if (*s == '\0')
     16 		return line = NULL;
     17 
     18 	line = s + strcspn(s, delim);
     19 	if (*line != '\0')
     20 		*line++ = '\0';
     21 	else
     22 		line = NULL;
     23 
     24 	return s;
     25 }