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// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
//
// 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 "DirectiveHandler.h"
#include <sstream>
#include "debug.h"
#include "Diagnostics.h"
static TBehavior getBehavior(const std::string& str)
{
static const std::string kRequire("require");
static const std::string kEnable("enable");
static const std::string kDisable("disable");
static const std::string kWarn("warn");
if (str == kRequire) return EBhRequire;
else if (str == kEnable) return EBhEnable;
else if (str == kDisable) return EBhDisable;
else if (str == kWarn) return EBhWarn;
return EBhUndefined;
}
TDirectiveHandler::TDirectiveHandler(TExtensionBehavior& extBehavior,
TDiagnostics& diagnostics,
int& shaderVersion)
: mExtensionBehavior(extBehavior),
mDiagnostics(diagnostics),
mShaderVersion(shaderVersion)
{
}
TDirectiveHandler::~TDirectiveHandler()
{
}
void TDirectiveHandler::handleError(const pp::SourceLocation& loc,
const std::string& msg)
{
mDiagnostics.writeInfo(pp::Diagnostics::PP_ERROR, loc, msg, "", "");
}
void TDirectiveHandler::handlePragma(const pp::SourceLocation& loc,
const std::string& name,
const std::string& value,
bool stdgl)
{
static const std::string kSTDGL("STDGL");
static const std::string kOptimize("optimize");
static const std::string kDebug("debug");
static const std::string kOn("on");
static const std::string kOff("off");
bool invalidValue = false;
if (stdgl || (name == kSTDGL))
{
// The STDGL pragma is used to reserve pragmas for use by future
// revisions of GLSL. Ignore it.
return;
}
else if (name == kOptimize)
{
if (value == kOn) mPragma.optimize = true;
else if (value == kOff) mPragma.optimize = false;
else invalidValue = true;
}
else if (name == kDebug)
{
if (value == kOn) mPragma.debug = true;
else if (value == kOff) mPragma.debug = false;
else invalidValue = true;
}
else
{
mDiagnostics.report(pp::Diagnostics::PP_UNRECOGNIZED_PRAGMA, loc, name);
return;
}
if (invalidValue)
mDiagnostics.writeInfo(pp::Diagnostics::PP_ERROR, loc,
"invalid pragma value", value,
"'on' or 'off' expected");
}
void TDirectiveHandler::handleExtension(const pp::SourceLocation& loc,
const std::string& name,
const std::string& behavior)
{
static const std::string kExtAll("all");
TBehavior behaviorVal = getBehavior(behavior);
if (behaviorVal == EBhUndefined)
{
mDiagnostics.writeInfo(pp::Diagnostics::PP_ERROR, loc,
"behavior", name, "invalid");
return;
}
if (name == kExtAll)
{
if (behaviorVal == EBhRequire)
{
mDiagnostics.writeInfo(pp::Diagnostics::PP_ERROR, loc,
"extension", name,
"cannot have 'require' behavior");
}
else if (behaviorVal == EBhEnable)
{
mDiagnostics.writeInfo(pp::Diagnostics::PP_ERROR, loc,
"extension", name,
"cannot have 'enable' behavior");
}
else
{
for (TExtensionBehavior::iterator iter = mExtensionBehavior.begin();
iter != mExtensionBehavior.end(); ++iter)
iter->second = behaviorVal;
}
return;
}
TExtensionBehavior::iterator iter = mExtensionBehavior.find(name);
if (iter != mExtensionBehavior.end())
{
iter->second = behaviorVal;
return;
}
pp::Diagnostics::Severity severity = pp::Diagnostics::PP_ERROR;
switch (behaviorVal) {
case EBhRequire:
severity = pp::Diagnostics::PP_ERROR;
break;
case EBhEnable:
case EBhWarn:
case EBhDisable:
severity = pp::Diagnostics::PP_WARNING;
break;
default:
UNREACHABLE(behaviorVal);
break;
}
mDiagnostics.writeInfo(severity, loc,
"extension", name, "is not supported");
}
void TDirectiveHandler::handleVersion(const pp::SourceLocation& loc,
int version)
{
if (version == 100 ||
version == 300)
{
mShaderVersion = version;
}
else
{
std::stringstream stream;
stream << version;
std::string str = stream.str();
mDiagnostics.writeInfo(pp::Diagnostics::PP_ERROR, loc,
"version number", str, "not supported");
}
}