| 1 | /*␊ |
| 2 | * strpbrk␊ |
| 3 | */␊ |
| 4 | ␊ |
| 5 | #include <limits.h>␊ |
| 6 | #include "strxspn.h"␊ |
| 7 | ␊ |
| 8 | size_t __strxspn(const char *s, const char *map, int parity)␊ |
| 9 | {␊ |
| 10 | ␉char matchmap[UCHAR_MAX + 1];␊ |
| 11 | ␉size_t n = 0;␊ |
| 12 | ␊ |
| 13 | ␉/* Create bitmap */␊ |
| 14 | ␉memset(matchmap, 0, sizeof matchmap);␊ |
| 15 | ␉while (*map)␊ |
| 16 | ␉␉matchmap[(unsigned char)*map++] = 1;␊ |
| 17 | ␊ |
| 18 | ␉/* Make sure the null character never matches */␊ |
| 19 | ␉matchmap[0] = parity;␊ |
| 20 | ␊ |
| 21 | ␉/* Calculate span length */␊ |
| 22 | ␉while (matchmap[(unsigned char)*s++] ^ parity)␊ |
| 23 | ␉␉n++;␊ |
| 24 | ␊ |
| 25 | ␉return n;␊ |
| 26 | }␊ |
| 27 | |
