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strcspn.c
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C/C++ Source or Header
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1994-11-29
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354 b
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21 lines
/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
#include <string.h>
size_t
strcspn(const char *s1, const char *s2)
{
const char *p, *spanp;
char c, sc;
for (p = s1;;)
{
c = *p++;
spanp = s2;
do {
if ((sc = *spanp++) == c)
return p - 1 - s1;
} while (sc != 0);
}
/* NOTREACHED */
}