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#ifndef XADMASTER_CONVERTE_C
#define XADMASTER_CONVERTE_C
/* $Id: ConvertE.c,v 1.5 2005/06/23 14:54:41 stoecker Exp $
endian conversion macros
XAD library system for archive handling
Copyright (C) 1998 and later by Dirk Stcker <soft@dstoecker.de>
This 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 2.1 of the License, or (at your option) any later version.
This 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 this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* EndGetXXX(a) - returns value read direct from memory in fixed size and
* endianness, returned to native order.
*
* Keep in mind, that the macros require calculation time, so avoid to use
* them double time. Call them once and reuse results.
*
* XXX can be:
* M64 - big-endian Motorola format, 64 bit value
* M32 - big-endian Motorola format, 32 bit value
* M24 - big-endian Motorola format, 24 bit value
* M16 - big-endian Motorola format, 16 bit value
*
* I64 - little-endian Intel format, 64 bit value
* I32 - little-endian Intel format, 32 bit value
* I24 - little-endian Intel format, 24 bit value
* I16 - little-endian Intel format, 16 bit value
*/
#define EndGetM32(a) (((((unsigned char *) a)[0]) << 24) | \
((((unsigned char *) a)[1]) << 16) | \
((((unsigned char *) a)[2]) << 8) | \
((((unsigned char *) a)[3])))
#define EndGetM24(a) (((((unsigned char *) a)[0]) << 16) | \
((((unsigned char *) a)[1]) << 8) | \
((((unsigned char *) a)[2])))
#define EndGetM16(a) (((((unsigned char *) a)[0]) << 8) | \
((((unsigned char *) a)[1])))
#define EndGetI32(a) (((((unsigned char *) a)[3]) << 24) | \
((((unsigned char *) a)[2]) << 16) | \
((((unsigned char *) a)[1]) << 8) | \
((((unsigned char *) a)[0])))
#define EndGetI24(a) (((((unsigned char *) a)[2]) << 16) | \
((((unsigned char *) a)[1]) << 8) | \
((((unsigned char *) a)[0])))
#define EndGetI16(a) (((((unsigned char *) a)[1]) << 8) | \
((((unsigned char *) a)[0])))
/* 64-bit support */
#define _convM32(a,n)(((((unsigned char *) a)[n+0]) << 24) | \
((((unsigned char *) a)[n+1]) << 16) | \
((((unsigned char *) a)[n+2]) << 8) | \
((((unsigned char *) a)[n+3])))
#define _convI32(a,n)(((((unsigned char *) a)[n+3]) << 24) | \
((((unsigned char *) a)[n+2]) << 16) | \
((((unsigned char *) a)[n+1]) << 8) | \
((((unsigned char *) a)[n+0])))
#if defined(AMIGA) /* AMIGA XAD has not 64 bit types yet */
# define EndGetI64(a) ((unsigned int) _convi32(a,0))
# define EndGetM64(a) ((unsigned int) _convm32(a,4))
#elif defined(HAVE_STDINT_H)
# include <stdint.h>
/* C99 -- use "uint64_t" as 64-bit type */
# define EndGetI64(a) ((((uint64_t) _convi32(a,4)) << 32) | \
((unsigned int) _convi32(a,0)))
# define EndGetM64(a) ((((uint64_t) _convm32(a,0)) << 32) | \
((unsigned int) _convm32(a,4)))
#else
/* GCC -- use "unsigned long long int" as 64-bit type */
# define EndGetI64(a) ((((unsigned long long int) _convi32(a,4)) << 32) | \
((unsigned int) _convi32(a,0)))
# define EndGetM64(a) ((((unsigned long long int) _convm32(a,0)) << 32) | \
((unsigned int) _convm32(a,4)))
#endif
#endif /* XADMASTER_CONVERTE_C */
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