tstrsep.c - iomenu - interactive terminal-based selection menu
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       ---
       tstrsep.c (311B)
       ---
            1 #include <string.h>
            2 
            3 char *
            4 strsep(char **strp, const char *delim)
            5 {
            6         char        *s, *oldp;
            7 
            8         if (*strp == NULL)
            9                 return NULL;
           10         for (s = oldp = *strp; ; s++) {
           11                 if (*s == '\0') {
           12                         *strp = NULL;
           13                         return oldp;
           14                 } else if (strchr(delim, *s) != NULL) {
           15                         break;
           16                 }
           17         }
           18         *s = '\0';
           19         *strp = s + 1;
           20         return oldp;
           21 }