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