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//
// Copyright (c) 2011 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.
//
#include "compiler/preprocessor/Preprocessor.h"
#include "common/debug.h"
#include "compiler/preprocessor/DiagnosticsBase.h"
#include "compiler/preprocessor/DirectiveParser.h"
#include "compiler/preprocessor/Macro.h"
#include "compiler/preprocessor/MacroExpander.h"
#include "compiler/preprocessor/Token.h"
#include "compiler/preprocessor/Tokenizer.h"
namespace pp
{
struct PreprocessorImpl
{
Diagnostics *diagnostics;
MacroSet macroSet;
Tokenizer tokenizer;
DirectiveParser directiveParser;
MacroExpander macroExpander;
PreprocessorImpl(Diagnostics *diag, DirectiveHandler *directiveHandler)
: diagnostics(diag),
tokenizer(diag),
directiveParser(&tokenizer, ¯oSet, diag, directiveHandler),
macroExpander(&directiveParser, ¯oSet, diag)
{
}
};
Preprocessor::Preprocessor(Diagnostics *diagnostics,
DirectiveHandler *directiveHandler)
{
mImpl = new PreprocessorImpl(diagnostics, directiveHandler);
}
Preprocessor::~Preprocessor()
{
delete mImpl;
}
bool Preprocessor::init(size_t count,
const char * const string[],
const int length[])
{
static const int kDefaultGLSLVersion = 100;
// Add standard pre-defined macros.
predefineMacro("__LINE__", 0);
predefineMacro("__FILE__", 0);
predefineMacro("__VERSION__", kDefaultGLSLVersion);
predefineMacro("GL_ES", 1);
return mImpl->tokenizer.init(count, string, length);
}
void Preprocessor::predefineMacro(const char *name, int value)
{
PredefineMacro(&mImpl->macroSet, name, value);
}
void Preprocessor::lex(Token *token)
{
bool validToken = false;
while (!validToken)
{
mImpl->macroExpander.lex(token);
switch (token->type)
{
// We should not be returning internal preprocessing tokens.
// Convert preprocessing tokens to compiler tokens or report
// diagnostics.
case Token::PP_HASH:
UNREACHABLE();
break;
case Token::PP_NUMBER:
mImpl->diagnostics->report(Diagnostics::PP_INVALID_NUMBER,
token->location, token->text);
break;
case Token::PP_OTHER:
mImpl->diagnostics->report(Diagnostics::PP_INVALID_CHARACTER,
token->location, token->text);
break;
default:
validToken = true;
break;
}
}
}
void Preprocessor::setMaxTokenSize(size_t maxTokenSize)
{
mImpl->tokenizer.setMaxTokenSize(maxTokenSize);
}
} // namespace pp
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