byte_diff.c
author tomas@localhost
Thu, 01 Nov 2007 14:46:11 +0100
changeset 0 c045670f36e9
permissions -rw-r--r--
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#include "byte.h"
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int byte_diff(s,n,t)
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register char *s;
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register unsigned int n;
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register char *t;
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{
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  for (;;) {
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    if (!n) return 0; if (*s != *t) break; ++s; ++t; --n;
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    if (!n) return 0; if (*s != *t) break; ++s; ++t; --n;
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    if (!n) return 0; if (*s != *t) break; ++s; ++t; --n;
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    if (!n) return 0; if (*s != *t) break; ++s; ++t; --n;
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  }
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  return ((int)(unsigned int)(unsigned char) *s)
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       - ((int)(unsigned int)(unsigned char) *t);
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}