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/*
* Copyright 2010, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "slang_pragma_recorder.h"
#include <string>
#include "clang/Basic/TokenKinds.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Lex/Token.h"
namespace slang {
bool PragmaRecorder::GetPragmaNameFromToken(const clang::Token &Token,
std::string &PragmaName) {
if (Token.isLiteral())
PragmaName.assign(Token.getLiteralData(), Token.getLength());
else if (Token.is(clang::tok::identifier))
PragmaName.assign(Token.getIdentifierInfo()->getNameStart(),
Token.getIdentifierInfo()->getLength());
else
return false;
return true;
}
bool PragmaRecorder::GetPragmaValueFromToken(const clang::Token &Token,
std::string &PragmaValue) {
// Same as the GetPragmaName()
if (Token.is(clang::tok::r_paren))
PragmaValue.clear();
else
return GetPragmaNameFromToken(Token, PragmaValue);
return true;
}
PragmaRecorder::PragmaRecorder(PragmaList *Pragmas)
: PragmaHandler(),
mPragmas(Pragmas) {
}
void PragmaRecorder::HandlePragma(clang::Preprocessor &PP,
clang::PragmaIntroducerKind Introducer,
clang::Token &FirstToken) {
clang::Token &CurrentToken = FirstToken;
std::string PragmaName, PragmaValue = "";
// Pragma in ACC should be a name/value pair
if (GetPragmaNameFromToken(FirstToken, PragmaName)) {
// start parsing the value '(' PragmaValue ')', if we have one.
const clang::Token* NextToken = &PP.LookAhead(0);
if (NextToken->is(clang::tok::l_paren))
PP.LexUnexpandedToken(CurrentToken);
else
goto end_parsing_pragma_value;
NextToken = &PP.LookAhead(0);
if (GetPragmaValueFromToken(*NextToken, PragmaValue)) {
PP.Lex(CurrentToken);
} else {
PP.LexUnexpandedToken(CurrentToken);
PP.Diag(NextToken->getLocation(),
PP.getDiagnostics().getCustomDiagID(
clang::DiagnosticsEngine::Error,
"expected value after '#pragma %0('")) << PragmaName;
return;
}
if (!NextToken->is(clang::tok::r_paren)) {
NextToken = &PP.LookAhead(0);
if (NextToken->is(clang::tok::r_paren)) {
PP.LexUnexpandedToken(CurrentToken);
} else {
PP.LexUnexpandedToken(CurrentToken);
PP.Diag(NextToken->getLocation(),
PP.getDiagnostics().getCustomDiagID(
clang::DiagnosticsEngine::Error,
"missing ')' after '#pragma %0(%1'"))
<< PragmaName << PragmaValue;
return;
}
}
} else {
PP.Diag(FirstToken.getLocation(),
PP.getDiagnostics().getCustomDiagID(
clang::DiagnosticsEngine::Error,
"no pragma name or value"));
return;
}
end_parsing_pragma_value:
// PragmaValue may be an empty string.
mPragmas->push_back(make_pair(PragmaName, PragmaValue));
// Inform lex to eat the token
PP.LexUnexpandedToken(CurrentToken);
}
} // namespace slang
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