machine_endian.h

/***************************************************************************
 *
 *   Copyright (C) 1999 by Willem van Straten
 *   Licensed under the Academic Free License version 2.1
 *
 ***************************************************************************/
// psrchive/Util/genutil/machine_endian.h
 
#ifndef __M_ENDIAN_H
#define __M_ENDIAN_H
 
/* the main byte-swapping function */
#ifdef __cplusplus
extern "C" {
#endif
 
void changeEndian (void *p, int size);
void array_changeEndian (int count, void *p, int element_size);
 
#ifdef __cplusplus
}
#endif
 
/* MACRO to save you some typing */
#define ChangeEndian(p) changeEndian (&(p), sizeof(p))
 
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
 
#ifdef WORDS_BIGENDIAN
 
#define MACHINE_LITTLE_ENDIAN 0
 
#define toBigEndian(p,s)
#define toLittleEndian(p,s)     changeEndian(p,s)
#define fromBigEndian(p,s)              
#define fromLittleEndian(p,s)   changeEndian(p,s)
 
/* short forms that save typing */
#define ToBigEndian(p)
#define ToLittleEndian(p)       changeEndian (&(p), sizeof(p))
#define FromBigEndian(p)
#define FromLittleEndian(p)     changeEndian (&(p), sizeof(p))
 
/* short forms that work on arrays */
#define N_ToBigEndian(N,p) 
#define N_ToLittleEndian(N,p)   array_changeEndian (N, p, sizeof(*p))
#define N_FromBigEndian(N,p) 
#define N_FromLittleEndian(N,p) array_changeEndian (N, p, sizeof(*p))
 
#else
 
#define MACHINE_LITTLE_ENDIAN 1
 
#define toBigEndian(p,s)        changeEndian(p,s)
#define toLittleEndian(p,s)
#define fromBigEndian(p,s)      changeEndian(p,s)
#define fromLittleEndian(p,s)
 
/* short forms that save typing */
#define ToBigEndian(p)          changeEndian (&(p), sizeof(p))
#define ToLittleEndian(p)
#define FromBigEndian(p)        changeEndian (&(p), sizeof(p))
#define FromLittleEndian(p)   
 
/* short forms that work on arrays */
#define N_ToBigEndian(N,p)      array_changeEndian (N, p, sizeof(*(p)))
#define N_ToLittleEndian(N,p)
#define N_FromBigEndian(N,p)    array_changeEndian (N, p, sizeof(*(p)))
#define N_FromLittleEndian(N,p)
 
#endif
 
#endif  /* !def __M_ENDIAN_H */