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#include "str.h"
int str_diffn(s,t,len)
register char *s;
register char *t;
unsigned int len;
{
register char x;
for (;;) {
if (!len--) return 0; x = *s; if (x != *t) break; if (!x) break; ++s; ++t;
if (!len--) return 0; x = *s; if (x != *t) break; if (!x) break; ++s; ++t;
if (!len--) return 0; x = *s; if (x != *t) break; if (!x) break; ++s; ++t;
if (!len--) return 0; x = *s; if (x != *t) break; if (!x) break; ++s; ++t;
}
return ((int)(unsigned int)(unsigned char) x)
- ((int)(unsigned int)(unsigned char) *t);
}
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