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//
// Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
#ifndef _CONSTANT_UNION_INCLUDED_
#define _CONSTANT_UNION_INCLUDED_
#include <assert.h>
class ConstantUnion {
public:
ConstantUnion()
{
iConst = 0;
type = EbtVoid;
}
POOL_ALLOCATOR_NEW_DELETE(GlobalPoolAllocator)
void setIConst(int i) {iConst = i; type = EbtInt; }
void setFConst(float f) {fConst = f; type = EbtFloat; }
void setBConst(bool b) {bConst = b; type = EbtBool; }
int getIConst() { return iConst; }
float getFConst() { return fConst; }
bool getBConst() { return bConst; }
int getIConst() const { return iConst; }
float getFConst() const { return fConst; }
bool getBConst() const { return bConst; }
bool operator==(const int i) const
{
return i == iConst;
}
bool operator==(const float f) const
{
return f == fConst;
}
bool operator==(const bool b) const
{
return b == bConst;
}
bool operator==(const ConstantUnion& constant) const
{
if (constant.type != type)
return false;
switch (type) {
case EbtInt:
return constant.iConst == iConst;
case EbtFloat:
return constant.fConst == fConst;
case EbtBool:
return constant.bConst == bConst;
default:
return false;
}
}
bool operator!=(const int i) const
{
return !operator==(i);
}
bool operator!=(const float f) const
{
return !operator==(f);
}
bool operator!=(const bool b) const
{
return !operator==(b);
}
bool operator!=(const ConstantUnion& constant) const
{
return !operator==(constant);
}
bool operator>(const ConstantUnion& constant) const
{
assert(type == constant.type);
switch (type) {
case EbtInt:
return iConst > constant.iConst;
case EbtFloat:
return fConst > constant.fConst;
default:
return false; // Invalid operation, handled at semantic analysis
}
}
bool operator<(const ConstantUnion& constant) const
{
assert(type == constant.type);
switch (type) {
case EbtInt:
return iConst < constant.iConst;
case EbtFloat:
return fConst < constant.fConst;
default:
return false; // Invalid operation, handled at semantic analysis
}
}
ConstantUnion operator+(const ConstantUnion& constant) const
{
ConstantUnion returnValue;
assert(type == constant.type);
switch (type) {
case EbtInt: returnValue.setIConst(iConst + constant.iConst); break;
case EbtFloat: returnValue.setFConst(fConst + constant.fConst); break;
default: assert(false && "Default missing");
}
return returnValue;
}
ConstantUnion operator-(const ConstantUnion& constant) const
{
ConstantUnion returnValue;
assert(type == constant.type);
switch (type) {
case EbtInt: returnValue.setIConst(iConst - constant.iConst); break;
case EbtFloat: returnValue.setFConst(fConst - constant.fConst); break;
default: assert(false && "Default missing");
}
return returnValue;
}
ConstantUnion operator*(const ConstantUnion& constant) const
{
ConstantUnion returnValue;
assert(type == constant.type);
switch (type) {
case EbtInt: returnValue.setIConst(iConst * constant.iConst); break;
case EbtFloat: returnValue.setFConst(fConst * constant.fConst); break;
default: assert(false && "Default missing");
}
return returnValue;
}
ConstantUnion operator%(const ConstantUnion& constant) const
{
ConstantUnion returnValue;
assert(type == constant.type);
switch (type) {
case EbtInt: returnValue.setIConst(iConst % constant.iConst); break;
default: assert(false && "Default missing");
}
return returnValue;
}
ConstantUnion operator>>(const ConstantUnion& constant) const
{
ConstantUnion returnValue;
assert(type == constant.type);
switch (type) {
case EbtInt: returnValue.setIConst(iConst >> constant.iConst); break;
default: assert(false && "Default missing");
}
return returnValue;
}
ConstantUnion operator<<(const ConstantUnion& constant) const
{
ConstantUnion returnValue;
assert(type == constant.type);
switch (type) {
case EbtInt: returnValue.setIConst(iConst << constant.iConst); break;
default: assert(false && "Default missing");
}
return returnValue;
}
ConstantUnion operator&(const ConstantUnion& constant) const
{
ConstantUnion returnValue;
assert(type == constant.type);
switch (type) {
case EbtInt: returnValue.setIConst(iConst & constant.iConst); break;
default: assert(false && "Default missing");
}
return returnValue;
}
ConstantUnion operator|(const ConstantUnion& constant) const
{
ConstantUnion returnValue;
assert(type == constant.type);
switch (type) {
case EbtInt: returnValue.setIConst(iConst | constant.iConst); break;
default: assert(false && "Default missing");
}
return returnValue;
}
ConstantUnion operator^(const ConstantUnion& constant) const
{
ConstantUnion returnValue;
assert(type == constant.type);
switch (type) {
case EbtInt: returnValue.setIConst(iConst ^ constant.iConst); break;
default: assert(false && "Default missing");
}
return returnValue;
}
ConstantUnion operator&&(const ConstantUnion& constant) const
{
ConstantUnion returnValue;
assert(type == constant.type);
switch (type) {
case EbtBool: returnValue.setBConst(bConst && constant.bConst); break;
default: assert(false && "Default missing");
}
return returnValue;
}
ConstantUnion operator||(const ConstantUnion& constant) const
{
ConstantUnion returnValue;
assert(type == constant.type);
switch (type) {
case EbtBool: returnValue.setBConst(bConst || constant.bConst); break;
default: assert(false && "Default missing");
}
return returnValue;
}
TBasicType getType() const { return type; }
private:
union {
int iConst; // used for ivec, scalar ints
bool bConst; // used for bvec, scalar bools
float fConst; // used for vec, mat, scalar floats
} ;
TBasicType type;
};
#endif // _CONSTANT_UNION_INCLUDED_