/* @(#)bswap.h 1.3 06/09/13 Copyright 2002 J. Schilling */ #ifndef _BSWAP_H #define _BSWAP_H /* * Allow to use B2N_* macros found in libdvdread in a portable way. * These macros should better be avoided as in place conversion in * general only works on processors like Motorola 68000 and Intel x86. * Modern processors usually have alignement restrictions that may * cause problems. The stripped down libdvdread for mkisofs is known * not to have these alignement problems, so we may use the macros * as they have been introduced by the authors of libdvdread. * * Copyright (c) 2002 J. Schilling */ /* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation. * * 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; see the file COPYING. If not, write to the Free Software * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include #include #include #if defined(WORDS_BIGENDIAN) /* All bigendian systems are fine, just ignore the swaps. */ #define B2N_16(x) (void)(x) #define B2N_32(x) (void)(x) #define B2N_64(x) (void)(x) #else /* * It is a bad idea to convert numbers in place. * In protocols, there is usually the additional problem that the * data is not properly aligned. */ #define B2N_16(x) (x) = a_to_u_2_byte(&(x)) #define B2N_32(x) (x) = a_to_u_4_byte(&(x)) #define B2N_64(x) (x) = a_to_u_8_byte(&(x)) #endif #endif /* _BSWAP_H */