ref: 4041be70bf23c172dda3d107e19d84c2fb58f644
dir: /common/libsndfile/src/sfendian.h/
/* ** Copyright (C) 1999-2001 Erik de Castro Lopo <[email protected]> ** ** This program 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 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 Lesser General Public License for more details. ** ** You should have received a copy of the GNU Lesser 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. */ #include "config.h" #if HAVE_ENDIAN_H /* This is the best way to do it. Unfortunately Sparc Solaris (and ** possibly others) don't have <endian.h> */ #include <endian.h> #if (__BYTE_ORDER == __LITTLE_ENDIAN) #define CPU_IS_LITTLE_ENDIAN 1 #define CPU_IS_BIG_ENDIAN 0 #elif (__BYTE_ORDER == __BIG_ENDIAN) #define CPU_IS_LITTLE_ENDIAN 0 #define CPU_IS_BIG_ENDIAN 1 #else #error "A bit confused about endian-ness! Have <endian.h> but not __BYTEORDER." #endif #else /* If we don't have <endian.h> use the guess based on target processor ** from the autoconf process. */ #if GUESS_LITTLE_ENDIAN #define CPU_IS_LITTLE_ENDIAN 1 #define CPU_IS_BIG_ENDIAN 0 #elif GUESS_BIG_ENDIAN #define CPU_IS_LITTLE_ENDIAN 0 #define CPU_IS_BIG_ENDIAN 1 #else #error "Endian guess seems incorrect." #endif #endif #define ENDSWAP_SHORT(x) ((((x)>>8)&0xFF)|(((x)&0xFF)<<8)) #define ENDSWAP_INT(x) ((((x)>>24)&0xFF)|(((x)>>8)&0xFF00)|(((x)&0xFF00)<<8)|(((x)&0xFF)<<24)) #if (CPU_IS_LITTLE_ENDIAN == 1) #define H2LE_SHORT(x) (x) #define H2LE_INT(x) (x) #define LE2H_SHORT(x) (x) #define LE2H_INT(x) (x) #define BE2H_INT(x) ENDSWAP_INT(x) #define BE2H_SHORT(x) ENDSWAP_SHORT(x) #define H2BE_INT(x) ENDSWAP_INT(x) #define H2BE_SHORT(x) ENDSWAP_SHORT(x) #elif (CPU_IS_BIG_ENDIAN == 1) #define H2LE_SHORT(x) ENDSWAP_SHORT(x) #define H2LE_INT(x) ENDSWAP_INT(x) #define LE2H_SHORT(x) ENDSWAP_SHORT(x) #define LE2H_INT(x) ENDSWAP_INT(x) #define BE2H_INT(x) (x) #define BE2H_SHORT(x) (x) #define H2BE_INT(x) (x) #define H2BE_SHORT(x) (x) #else #error "Cannot determine endian-ness of processor." #endif #if (CPU_IS_LITTLE_ENDIAN == 1) # define MAKE_MARKER(a,b,c,d) ((a)|((b)<<8)|((c)<<16)|((d)<<24)) #elif (CPU_IS_BIG_ENDIAN == 1) # define MAKE_MARKER(a,b,c,d) (((a)<<24)|((b)<<16)|((c)<<8)|(d)) #else # error "Cannot determine endian-ness of processor." #endif