47 lines
875 B
C
47 lines
875 B
C
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/* memcmp( const void *, const void *, size_t )
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This file is part of the Public Domain C Library (PDCLib).
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Permission is granted to use, modify, and / or redistribute at will.
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*/
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#include <string.h>
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#ifndef REGTEST
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int memcmp( const void * s1, const void * s2, size_t n )
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{
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const unsigned char * p1 = ( const unsigned char * ) s1;
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const unsigned char * p2 = ( const unsigned char * ) s2;
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while ( n-- )
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{
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if ( *p1 != *p2 )
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{
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return *p1 - *p2;
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}
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++p1;
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++p2;
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}
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return 0;
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}
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#endif
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#ifdef TEST
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#include "_PDCLIB_test.h"
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int main( void )
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{
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const char xxxxx[] = "xxxxx";
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TESTCASE( memcmp( abcde, abcdx, 5 ) < 0 );
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TESTCASE( memcmp( abcde, abcdx, 4 ) == 0 );
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TESTCASE( memcmp( abcde, xxxxx, 0 ) == 0 );
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TESTCASE( memcmp( xxxxx, abcde, 1 ) > 0 );
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return 0;
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}
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#endif
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