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/*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#pragma once
#ifdef __cplusplus
extern "C" {
#endif
/* only include from header */
#ifndef __BLI_ENDIAN_SWITCH_H__
# error "this file isnt to be directly included"
#endif
/** \file
* \ingroup bli
*/
/* note: using a temp char to switch endian is a lot slower,
* use bit shifting instead. */
/* *** 16 *** */
BLI_INLINE void BLI_endian_switch_int16(short *val)
{
BLI_endian_switch_uint16((unsigned short *)val);
}
BLI_INLINE void BLI_endian_switch_uint16(unsigned short *val)
{
#if (defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 408)) /* gcc4.8+ only */
*val = __builtin_bswap16(*val);
#else
unsigned short tval = *val;
*val = (tval >> 8) | (tval << 8);
#endif
}
/* *** 32 *** */
BLI_INLINE void BLI_endian_switch_int32(int *val)
{
BLI_endian_switch_uint32((unsigned int *)val);
}
BLI_INLINE void BLI_endian_switch_uint32(unsigned int *val)
{
#ifdef __GNUC__
*val = __builtin_bswap32(*val);
#else
unsigned int tval = *val;
*val = ((tval >> 24)) | ((tval << 8) & 0x00ff0000) | ((tval >> 8) & 0x0000ff00) | ((tval << 24));
#endif
}
BLI_INLINE void BLI_endian_switch_float(float *val)
{
BLI_endian_switch_uint32((unsigned int *)val);
}
/* *** 64 *** */
BLI_INLINE void BLI_endian_switch_int64(int64_t *val)
{
BLI_endian_switch_uint64((uint64_t *)val);
}
BLI_INLINE void BLI_endian_switch_uint64(uint64_t *val)
{
#ifdef __GNUC__
*val = __builtin_bswap64(*val);
#else
uint64_t tval = *val;
*val = ((tval >> 56)) | ((tval << 40) & 0x00ff000000000000ll) |
((tval << 24) & 0x0000ff0000000000ll) | ((tval << 8) & 0x000000ff00000000ll) |
((tval >> 8) & 0x00000000ff000000ll) | ((tval >> 24) & 0x0000000000ff0000ll) |
((tval >> 40) & 0x000000000000ff00ll) | ((tval << 56));
#endif
}
BLI_INLINE void BLI_endian_switch_double(double *val)
{
BLI_endian_switch_uint64((uint64_t *)val);
}
#ifdef __cplusplus
}
#endif
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