source: asp3_tinet_ecnl_rx/trunk/musl-1.1.18/src/string/strcspn.c@ 337

Last change on this file since 337 was 337, checked in by coas-nagasima, 6 years ago

ASP3版ECNLを追加
  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/x-csrc;charset=UTF-8
File size: 494 bytes
Line 
1#include <string.h>
2
3#define BITOP(a,b,op) \
4 ((a)[(size_t)(b)/(8*sizeof *(a))] op (size_t)1<<((size_t)(b)%(8*sizeof *(a))))
5
6char *__strchrnul(const char *, int);
7
8size_t strcspn(const char *s, const char *c)
9{
10 const char *a = s;
11 size_t byteset[32/sizeof(size_t)];
12
13 if (!c[0] || !c[1]) return __strchrnul(s, *c)-a;
14
15 memset(byteset, 0, sizeof byteset);
16 for (; *c && BITOP(byteset, *(unsigned char *)c, |=); c++);
17 for (; *s && !BITOP(byteset, *(unsigned char *)s, &); s++);
18 return s-a;
19}
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