src/compiler/translator/util.h

//
// Copyright (c) 2002-2010 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 COMPILER_UTIL_H
#define COMPILER_UTIL_H

#include <stack>

#include "angle_gl.h"
#include <GLSLANG/ShaderLang.h>

#include "compiler/translator/Types.h"

// atof_clamp is like atof but
//   1. it forces C locale, i.e. forcing '.' as decimal point.
//   2. it clamps the value to -FLT_MAX or FLT_MAX if overflow happens.
// Return false if overflow happens.
extern bool atof_clamp(const char *str, float *value);

// If overflow happens, clamp the value to INT_MIN or INT_MAX.
// Return false if overflow happens.
extern bool atoi_clamp(const char *str, int *value);

class TSymbolTable;

namespace sh
{

GLenum GLVariableType(const TType &type);
GLenum GLVariablePrecision(const TType &type);
bool IsVaryingIn(TQualifier qualifier);
bool IsVaryingOut(TQualifier qualifier);
bool IsVarying(TQualifier qualifier);
InterpolationType GetInterpolationType(TQualifier qualifier);
TString ArrayString(const TType &type);

class GetVariableTraverser
{
  public:
    GetVariableTraverser(const TSymbolTable &symbolTable);

    template <typename VarT>
    void traverse(const TType &type, const TString &name, std::vector<VarT> *output);

  protected:
    // May be overloaded
    virtual void visitVariable(ShaderVariable *newVar) {}

  private:
    // Helper function called by traverse() to fill specific fields
    // for attributes/varyings/uniforms.
    template <typename VarT>
    void setTypeSpecificInfo(
        const TType &type, const TString &name, VarT *variable) {}

    const TSymbolTable &mSymbolTable;

    DISALLOW_COPY_AND_ASSIGN(GetVariableTraverser);
};

}

#endif // COMPILER_UTIL_H