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endian.h
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endian.h
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/* Raw - Another World Interpreter
* Copyright (C) 2004 Gregory Montoir
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program 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 General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __SYS_H__
#define __SYS_H__
#include <stdint.h>
// these are essentially the same as big endian but
// handle unaligned accesses...
inline uint16_t READ_BE_UINT16(const void *ptr) {
const uint8_t *b = (const uint8_t *)ptr;
return (b[0] << 8) | b[1];
}
inline uint32_t READ_BE_UINT32(const void *ptr) {
const uint8_t *b = (const uint8_t *)ptr;
return (b[0] << 24) | (b[1] << 16) | (b[2] << 8) | b[3];
}
#if 0
inline uint16_t READ_BE_UINT16(const void *ptr) {
const uint8_t *b = (const uint8_t *)ptr;
if (((uintptr_t)b & 0x1) == 0) {
return *(uint16_t *)b;
}
return (b[0] << 8) | b[1];
}
inline uint32_t READ_BE_UINT32(const void *ptr) {
const uint8_t *b = (const uint8_t *)ptr;
if (((uintptr_t)b & 0x3) == 0) {
return *(uint32_t *)b;
}
return (b[0] << 24) | (b[1] << 16) | (b[2] << 8) | b[3];
}
#endif
#endif //__SYS_H__