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/***
*strcmp.c - routine to compare two strings (for equal, less, or greater)
*
* Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Compares two string, determining their lexical order.
*
*Revision History:
* 05-31-89 JCR C version created.
* 02-27-90 GJF Fixed calling type, #include <cruntime.h>, fixed
* copyright.
* 10-01-90 GJF New-style function declarator.
* 04-01-91 SRW Add #pragma function for i386 _WIN32_ and _CRUISER_
* builds
* 10-11-91 GJF Bug fix! Comparison of final bytes must use unsigned
* chars.
*
*******************************************************************************/
#include <cruntime.h>
#include <string.h>
#if defined(_CRUISER_) || defined(i386)
#pragma function(strcmp)
#endif /* ndef _CRUISER_ */
/***
*strcmp - compare two strings, returning less than, equal to, or greater than
*
*Purpose:
* STRCMP compares two strings and returns an integer
* to indicate whether the first is less than the second, the two are
* equal, or whether the first is greater than the second.
*
* Comparison is done byte by byte on an UNSIGNED basis, which is to
* say that Null (0) is less than any other character (1-255).
*
*Entry:
* const char * src - string for left-hand side of comparison
* const char * dst - string for right-hand side of comparison
*
*Exit:
* returns -1 if src < dst
* returns 0 if src == dst
* returns +1 if src > dst
*
*Exceptions:
*
*******************************************************************************/
int _CALLTYPE1 strcmp (
const char * src,
const char * dst
)
{
int ret = 0 ;
while( ! (ret = *(unsigned char *)src - *(unsigned char *)dst) && *dst)
++src, ++dst;
if ( ret < 0 )
ret = -1 ;
else if ( ret > 0 )
ret = 1 ;
return( ret );
}
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