mirror of https://github.com/nealey/eris.git
22 lines
767 B
C
22 lines
767 B
C
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#include "byte.h"
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/* byte_diff returns negative, 0, or positive, depending on whether the
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* string one[0], one[1], ..., one[len-1] is lexicographically smaller
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* than, equal to, or greater than the string one[0], one[1], ...,
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* one[len-1]. When the strings are different, byte_diff does not read
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* bytes past the first difference. */
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int byte_diff(const void* a, unsigned int len, const void* b) {
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register const char* s=a;
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register const char* t=b;
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register const char* u=t+len;
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register int j;
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j=0;
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for (;;) {
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if (t==u) break; if ((j=(*s-*t))) break; ++s; ++t;
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if (t==u) break; if ((j=(*s-*t))) break; ++s; ++t;
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if (t==u) break; if ((j=(*s-*t))) break; ++s; ++t;
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if (t==u) break; if ((j=(*s-*t))) break; ++s; ++t;
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}
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return j;
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}
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