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Length: 12637 (0x315d)
Types: TextFile
Names: »Fix16.h«
└─⟦a05ed705a⟧ Bits:30007078 DKUUG GNU 2/12/89
└─⟦cc8755de2⟧ »./libg++-1.36.1.tar.Z«
└─⟦23757c458⟧
└─⟦this⟧ »libg++/g++-include/Fix16.h«
// This may look like C code, but it is really -*- C++ -*-
/*
Copyright (C) 1988 Free Software Foundation
written by Kurt Baudendistel (gt-eedsp!baud@gatech.edu)
adapted for libg++ by Doug Lea (dl@rocky.oswego.edu)
This file is part of GNU CC.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY. No author or distributor
accepts responsibility to anyone for the consequences of using it
or for whether it serves any particular purpose or works at all,
unless he says so in writing. Refer to the GNU CC General Public
License for full details.
Everyone is granted permission to copy, modify and redistribute
GNU CC, but only under the conditions described in the
GNU CC General Public License. A copy of this license is
supposed to have been given to you along with GNU CC so you
can know your rights and responsibilities. It should be in a
file named COPYING. Among other things, the copyright notice
and this notice must be preserved on all copies.
*/
#ifndef _Fix16_h
#pragma once
#define _Fix16_h 1
#include <stream.h>
#include <std.h>
// constant definitions
#define Fix16_fs ((double)((unsigned)(1 << 15)))
#define Fix16_msb (1 << 15)
#define Fix16_m_max ((1 << 15) - 1)
#define Fix16_m_min ((short)(1 << 15))
#define Fix16_mult Fix16_fs
#define Fix16_div (1./Fix16_fs)
#define Fix16_max (1. - .5/Fix16_fs)
#define Fix16_min (-1.)
#define Fix32_fs ((double)((unsigned long)(1 << 31)))
#define Fix32_msb ((unsigned long)(1 << 31))
#define Fix32_m_max ((1 << 31) - 1)
#define Fix32_m_min ((long)(1 << 31))
#define Fix32_mult Fix32_fs
#define Fix32_div (1./Fix32_fs)
#define Fix32_max (1. - .5/Fix32_fs)
#define Fix32_min (-1.)
//
// Fix16 class: 16-bit Fixed point data type
//
// consists of a 16-bit mantissa (sign bit & 15 data bits).
//
class Fix16
{
friend class Fix32;
short m;
short round(double d);
short assign(double d);
Fix16(short i);
Fix16(int i);
operator double();
public:
Fix16();
Fix16(Fix16& f);
Fix16(double d);
Fix16(Fix32& f);
~Fix16();
Fix16& operator=(Fix16& f);
Fix16& operator=(double d);
Fix16& operator=(Fix32& f);
friend short& mantissa(Fix16& f);
friend double value(Fix16& f);
Fix16 operator + ();
Fix16 operator - ();
friend Fix16 operator + (Fix16& f, Fix16& g);
friend Fix16 operator - (Fix16& f, Fix16& g);
friend Fix32 operator * (Fix16& f, Fix16& g);
friend Fix16 operator / (Fix16& f, Fix16& g);
friend Fix16 operator << (Fix16& f, int b);
friend Fix16 operator >> (Fix16& f, int b);
Fix16& operator += (Fix16& f);
Fix16& operator -= (Fix16& f);
Fix16& operator *= (Fix16& );
Fix16& operator /= (Fix16& f);
Fix16& operator <<=(int b);
Fix16& operator >>=(int b);
friend int operator == (Fix16& f, Fix16& g);
friend int operator != (Fix16& f, Fix16& g);
friend int operator >= (Fix16& f, Fix16& g);
friend int operator <= (Fix16& f, Fix16& g);
friend int operator > (Fix16& f, Fix16& g);
friend int operator < (Fix16& f, Fix16& g);
friend istream& operator >> (istream& s, Fix16& f);
friend ostream& operator << (ostream& s, Fix16& f);
void overflow(short&);
void range_error(short&);
friend Fix16 operator * (Fix16& f, int g);
friend Fix16 operator * (int g, Fix16& f);
Fix16& operator *= (int g);
};
//
// Fix32 class: 32-bit Fixed point data type
//
// consists of a 32-bit mantissa (sign bit & 31 data bits).
//
class Fix32
{
friend class Fix16;
long m;
long round(double d);
long assign(double d);
Fix32(long i);
operator double();
public:
Fix32();
Fix32(Fix32& f);
Fix32(Fix16& f);
Fix32(double d);
~Fix32();
Fix32& operator = (Fix32& f);
Fix32& operator = (Fix16& f);
Fix32& operator = (double d);
friend long& mantissa(Fix32& f);
friend double value(Fix32& f);
Fix32 operator + ();
Fix32 operator - ();
friend Fix32 operator + (Fix32& f, Fix32& g);
friend Fix32 operator - (Fix32& f, Fix32& g);
friend Fix32 operator * (Fix32& f, Fix32& g);
friend Fix32 operator / (Fix32& f, Fix32& g);
friend Fix32 operator << (Fix32& f, int b);
friend Fix32 operator >> (Fix32& f, int b);
friend Fix32 operator * (Fix16& f, Fix16& g);
Fix32& operator += (Fix32& f);
Fix32& operator -= (Fix32& f);
Fix32& operator *= (Fix32& f);
Fix32& operator /= (Fix32& f);
Fix32& operator <<=(int b);
Fix32& operator >>=(int b);
friend int operator == (Fix32& f, Fix32& g);
friend int operator != (Fix32& f, Fix32& g);
friend int operator >= (Fix32& f, Fix32& g);
friend int operator <= (Fix32& f, Fix32& g);
friend int operator > (Fix32& f, Fix32& g);
friend int operator < (Fix32& f, Fix32& g);
friend istream& operator >> (istream& s, Fix32& f);
friend ostream& operator << (ostream& s, Fix32& f);
void overflow(long& i);
void range_error(long& i);
friend Fix32 operator * (Fix32& f, int g);
friend Fix32 operator * (int g, Fix32& f);
Fix32& operator *= (int g);
};
inline Fix16::~Fix16() {}
inline short Fix16::round(double d)
{
return short( (d >= 0)? d + 0.5 : d - 0.5);
}
inline Fix16::Fix16(short i)
{
m = i;
}
inline Fix16::Fix16(int i)
{
m = i;
}
inline Fix16::operator double()
{
return Fix16_div * m;
}
inline Fix16::Fix16()
{
m = 0;
}
inline Fix16::Fix16(Fix16& f)
{
m = f.m;
}
inline Fix16::Fix16(double d)
{
m = assign(d);
}
inline Fix16::Fix16(Fix32& f)
{
m = f.m >> 16;
}
inline Fix16& Fix16::operator=(Fix16& f)
{
m = f.m;
return *this;
}
inline Fix16& Fix16::operator=(double d)
{
m = assign(d);
return *this;
}
inline Fix16& Fix16::operator=(Fix32& f)
{
m = f.m >> 16;
return *this;
}
inline short& mantissa(Fix16& f)
{
return f.m;
}
inline double value(Fix16& f)
{
return double(f);
}
inline Fix16 Fix16::operator+()
{
return m;
}
inline Fix16 Fix16::operator-()
{
return -m;
}
inline Fix16 operator+(Fix16& f, Fix16& g)
{
short sum = f.m + g.m;
if ( (f.m ^ sum) & (g.m ^ sum) & Fix16_msb )
f.overflow(sum);
return sum;
}
inline Fix16 operator-(Fix16& f, Fix16& g)
{
short sum = f.m - g.m;
if ( (f.m ^ sum) & (-g.m ^ sum) & Fix16_msb )
f.overflow(sum);
return sum;
}
inline Fix32 operator*(Fix16& f, Fix16& g)
{
return Fix32( long( long(f.m) * long(g.m) << 1));
}
inline Fix16 operator<<(Fix16& a, int b)
{
return a.m << b;
}
inline Fix16 operator>>(Fix16& a, int b)
{
return a.m >> b;
}
inline Fix16& Fix16:: operator+=(Fix16& f)
{
return *this = *this + f;
}
inline Fix16& Fix16:: operator-=(Fix16& f)
{
return *this = *this - f;
}
inline Fix16& Fix16::operator*=(Fix16& f)
{
return *this = *this * f;
}
inline Fix16& Fix16:: operator/=(Fix16& f)
{
return *this = *this / f;
}
inline Fix16& Fix16:: operator<<=(int b)
{
return *this = *this << b;
}
inline Fix16& Fix16:: operator>>=(int b)
{
return *this = *this >> b;
}
inline int operator==(Fix16& f, Fix16& g)
{
return f.m == g.m;
}
inline int operator!=(Fix16& f, Fix16& g)
{
return f.m != g.m;
}
inline int operator>=(Fix16& f, Fix16& g)
{
return f.m >= g.m;
}
inline int operator<=(Fix16& f, Fix16& g)
{
return f.m <= g.m;
}
inline int operator>(Fix16& f, Fix16& g)
{
return f.m > g.m;
}
inline int operator<(Fix16& f, Fix16& g)
{
return f.m < g.m;
}
inline istream& operator>>(istream& s, Fix16& f)
{
double d;
s >> d;
f = d;
return s;
}
inline ostream& operator<<(ostream& s, Fix16& f)
{
return s << double(f);
}
inline Fix16 operator*(int g, Fix16& f)
{
return f * g;
}
inline Fix16& Fix16::operator*=(int g)
{
return *this = *this * g;
}
inline Fix16 operator*(Fix16& f, int g)
{
return Fix16(short(f.m * g));
}
inline Fix32::~Fix32() {}
inline long Fix32::round(double d)
{
return long( (d >= 0)? d + 0.5 : d - 0.5);
}
inline Fix32::Fix32(long i)
{
m = i;
}
inline Fix32:: operator double()
{
return Fix32_div * m;
}
inline Fix32::Fix32()
{
m = 0;
}
inline Fix32::Fix32(Fix32& f)
{
m = f.m;
}
inline Fix32::Fix32(Fix16& f)
{
m = long(f.m) << 16;
}
inline Fix32::Fix32(double d)
{
m = assign(d);
}
inline Fix32& Fix32::operator=(Fix32& f)
{
m = f.m;
return *this;
}
inline Fix32& Fix32::operator=(Fix16& f)
{
m = long(f.m) << 16;
return *this;
}
inline Fix32& Fix32::operator=(double d)
{
m = assign(d);
return *this;
}
inline long& mantissa(Fix32& f)
{
return f.m;
}
inline double value(Fix32& f)
{
return double(f);
}
inline Fix32 Fix32::operator+()
{
return m;
}
inline Fix32 Fix32::operator-()
{
return -m;
}
inline Fix32 operator+(Fix32& f, Fix32& g)
{
long sum = f.m + g.m;
if ( (f.m ^ sum) & (g.m ^ sum) & Fix32_msb )
f.overflow(sum);
return sum;
}
inline Fix32 operator-(Fix32& f, Fix32& g)
{
long sum = f.m - g.m;
if ( (f.m ^ sum) & (-g.m ^ sum) & Fix32_msb )
f.overflow(sum);
return sum;
}
inline Fix32 operator<<(Fix32& a, int b)
{
return a.m << b;
}
inline Fix32 operator>>(Fix32& a, int b)
{
return a.m >> b;
}
inline Fix32& Fix32::operator+=(Fix32& f)
{
return *this = *this + f;
}
inline Fix32& Fix32::operator-=(Fix32& f)
{
return *this = *this - f;
}
inline Fix32& Fix32::operator*=(Fix32& f)
{
return *this = *this * f;
}
inline Fix32& Fix32::operator/=(Fix32& f)
{
return *this = *this / f;
}
inline Fix32& Fix32::operator<<=(int b)
{
return *this = *this << b;
}
inline Fix32& Fix32::operator>>=(int b)
{
return *this = *this >> b;
}
inline int operator==(Fix32& f, Fix32& g)
{
return f.m == g.m;
}
inline int operator!=(Fix32& f, Fix32& g)
{
return f.m != g.m;
}
inline int operator>=(Fix32& f, Fix32& g)
{
return f.m >= g.m;
}
inline int operator<=(Fix32& f, Fix32& g)
{
return f.m <= g.m;
}
inline int operator>(Fix32& f, Fix32& g)
{
return f.m > g.m;
}
inline int operator<(Fix32& f, Fix32& g)
{
return f.m < g.m;
}
inline istream& operator>>(istream& s, Fix32& f)
{
double d;
s >> d;
f = d;
return s;
}
inline ostream& operator<<(ostream& s, Fix32& f)
{
return s << double(f);
}
inline Fix32 operator*(int g, Fix32& f)
{
return f * g;
}
inline Fix32& Fix32::operator*=(int g)
{
return *this = *this * g;
}
inline Fix32 operator*(Fix32& f, int g)
{
return Fix32(long(f.m * g));
}
// active error handler declarations
typedef void (*Fix16_peh)(short&);
typedef void (*Fix32_peh)(long&);
extern Fix16_peh Fix16_overflow_handler;
extern Fix32_peh Fix32_overflow_handler;
extern Fix16_peh Fix16_range_error_handler;
extern Fix32_peh Fix32_range_error_handler;
// error handler declarations
extern Fix16_peh set_Fix16_overflow_handler(Fix16_peh);
extern Fix32_peh set_Fix32_overflow_handler(Fix32_peh);
extern void set_overflow_handler(Fix16_peh, Fix32_peh);
extern Fix16_peh set_Fix16_range_error_handler(Fix16_peh);
extern Fix32_peh set_Fix32_range_error_handler(Fix32_peh);
extern void set_range_error_handler(Fix16_peh, Fix32_peh);
extern void
Fix16_ignore(short&),
Fix16_overflow_saturate(short&),
Fix16_overflow_warning_saturate(short&),
Fix16_warning(short&),
Fix16_abort(short&);
extern void
Fix32_ignore(long&),
Fix32_overflow_saturate(long&),
Fix32_overflow_warning_saturate(long&),
Fix32_warning(long&),
Fix32_abort(long&);
#endif