Last change
on this file was 389, checked in by coas-nagasima, 5 years ago |
ビルドが通るよう更新
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Property svn:eol-style
set to
native
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Property svn:mime-type
set to
text/x-csrc;charset=UTF-8
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File size:
452 bytes
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Rev | Line | |
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[388] | 1 | #include <string.h>
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| 2 |
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| 3 | #define BITOP(a,b,op) \
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| 4 | ((a)[(size_t)(b)/(8*sizeof *(a))] op (size_t)1<<((size_t)(b)%(8*sizeof *(a))))
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| 5 |
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| 6 | size_t strspn(const char *s, const char *c)
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| 7 | {
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| 8 | const char *a = s;
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| 9 | size_t byteset[32/sizeof(size_t)] = { 0 };
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| 10 |
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| 11 | if (!c[0]) return 0;
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| 12 | if (!c[1]) {
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| 13 | for (; *s == *c; s++);
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| 14 | return s-a;
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| 15 | }
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| 16 |
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| 17 | for (; *c && BITOP(byteset, *(unsigned char *)c, |=); c++);
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| 18 | for (; *s && BITOP(byteset, *(unsigned char *)s, &); s++);
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| 19 | return s-a;
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| 20 | }
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