lib/strsep.c


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#include <stdio.h>

char *strsep(char **stringp, const char *delim)
{
        char *s;
        const char *spanp;
        int c, sc;
        char *tok;

        if ((s = *stringp) == NULL)
                return (NULL);
        for (tok = s;;) {
                c = *s++;
                spanp = delim;
                do {
                        if ((sc = *spanp++) == c) {
                                if (c == 0)
                                        s = NULL;
                                else
                                        s[-1] = 0;
                                *stringp = s;
                                return (tok);
                        }
                } while (sc != 0);
        }
}