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sortix--sortix/libc/memcmp.cpp
2012-12-14 14:13:36 +01:00

37 lines
1.3 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
This file is part of the Sortix C Library.
The Sortix C Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
The Sortix C Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
memcmp.cpp
Compares two memory regions.
*******************************************************************************/
#include <stdint.h>
#include <string.h>
extern "C" int memcmp(const void* a, const void* b, size_t size)
{
const uint8_t* buf1 = (const uint8_t*) a;
const uint8_t* buf2 = (const uint8_t*) b;
for ( size_t i = 0; i < size; i++ )
{
if ( buf1[i] != buf2[i] ) { return (int)(buf1[i]) - (int)(buf2[i]); }
}
return 0;
}