29 lines
679 B
C
29 lines
679 B
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <libc.h>
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#define N 256
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int32_t
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jehanne_strspn(const char *s, const char *b)
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{
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const char *os;
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char map[N];
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jehanne_memset(map, 0, N);
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while(*b)
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map[*(uint8_t *)b++] = 1;
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os = s;
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while(map[*(uint8_t *)s++])
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;
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return s - os - 1;
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}
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