openalbridge/endianness.c
author nemo
Thu, 25 Jun 2009 10:50:44 +0000
changeset 2196 7032f286301b
parent 2191 20c62f787a4d
child 2200 8192be6e3aef
permissions -rw-r--r--
small jetpack tweak
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/*
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 * OpenAL Bridge - a simple portable library for OpenAL interface
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 * Copyright (c) 2009 Vittorio Giovara <vittorio.giovara@gmail.com>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; version 2 of the License
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include "endianness.h"
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#ifdef __CPLUSPLUS
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extern "C" {
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#endif 
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	//from big endian to little endian
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	int invert_endianness(int number){
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		uint8_t n1,n2,n3,n4;
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		uint32_t a1,a2,a3,a4;
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		uint32_t done = 0;
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		n1 = number;
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		n2 = number >> 8;
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		n3 = number >> 16;
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		n4 = number >> 24;
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		//printf("%X, %X, %X, %X\n", n1, n2, n3, n4);
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		a1 = (uint32_t) n1 << 24;
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		a2 = (uint32_t) n2 << 16;
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		a3 = (uint32_t) n3 << 8;
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		a4 = (uint32_t) n4;
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		done = a1 + a2 + a3 + a4;
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		//printf("%08X %08X %08X %08X = %08X\n", a1, a2, a3, a4, done);
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		return done;
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	}
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#ifdef __CPLUSPLUS
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}
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#endif