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Sprite 1984 - 1993
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strcmp.c
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C/C++ Source or Header
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1992-03-27
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/*
* strcmp.c --
*
* Source code for the "strcmp" library routine.
*
* Copyright 1988 Regents of the University of California
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies. The University of California
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*/
#ifndef lint
static char rcsid[] = "$Header: /sprite/src/lib/c/string/RCS/strcmp.c,v 1.3 92/03/27 13:29:58 rab Exp $ SPRITE (Berkeley)";
#endif /* not lint */
#include <string.h>
/*
*----------------------------------------------------------------------
*
* strcmp --
*
* Compare two strings lexicographically.
*
* Results:
* The return value is 0 if the strings are identical, 1
* if the first string is greater than the second, and
* -1 if the first string is less than the second. If one
* string is a prefix of the other then it is considered
* to be less (the terminating zero byte participates in the
* comparison).
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
strcmp(s1, s2)
register char *s1, *s2; /* Strings to compare. */
{
int c1, c2;
while (1) {
c1 = *s1++;
c2 = *s2++;
if (c1 != c2) {
return c1 - c2;
}
if (c1 == 0) {
return 0;
}
}
}