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// byteswap.h
/******************************************************************************
*
* MiXViews - an X window system based sound & data editor/processor
*
* Copyright (c) 1993, 1994 Regents of the University of California
*
* Author: Douglas Scott
* Date: December 13, 1994
*
* Permission to use, copy and modify this software and its documentation
* for research and/or educational purposes and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation. The author reserves the right to distribute this
* software and its documentation. The University of California and the author
* make no representations about the suitability of this software for any
* purpose, and in no event shall University of California be liable for any
* damage, loss of data, or profits resulting from its use.
* It is provided "as is" without express or implied warranty.
*
******************************************************************************/
// inline routines for swapping bytes for standard datatypes
#ifndef BYTESWAP_H
#define BYTESWAP_H
/*
* July 5, 1991
* Copyright 1991 Lance Norskog And Sundry Contributors
* This source code is freely redistributable and may be used for
* any purpose. This copyright notice must be maintained.
* Lance Norskog And Sundry Contributors are not responsible for
* the consequences of using this software.
*/
/* Byte swappers */
/* generic swap routine */
static void
swapBytes(char *l, char *f, int n) {
for (int i= 0; i< n; i++)
f[i]= l[n-i-1];
}
inline unsigned short
swap(unsigned short us) {
return ((us >> 8) | (us << 8)) & 0xffff;
}
inline short
swap(short s) { return short(swap((unsigned short) s)); }
inline unsigned INT32
swap(unsigned INT32 ul) {
return (ul >> 24) | ((ul >> 8) & 0xff00) | ((ul << 8) & 0xff0000) | (ul << 24);
}
inline INT32
swap(INT32 l) { return long(swap((unsigned long) l)); }
inline int
swap(int i) { return int(swap((unsigned INT32) i)); }
inline float
swap(float uf) {
union { unsigned INT32 l; float f; } u;
u.f = uf;
u.l = swap(u.l);
return (u.f);
}
inline double
swap(double df) {
double sdf;
swapBytes((char *) &df, (char *) &sdf, sizeof(df));
return (sdf);
}
// dont swap references to classes
inline const class Id &
swap(const class Id& id) { return id; }
inline const class IEEE_Float &
swap(const class IEEE_Float& f) { return f; }
inline const class CompressionName&
swap(const class CompressionName& name) { return name; }
#endif
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