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/*
* Copyright 2015, 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_rs_special_func.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Attr.h"
#include "slang_assert.h"
#include "slang_version.h"
namespace slang {
bool RSSpecialFunc::isGraphicsRootRSFunc(unsigned int targetAPI,
const clang::FunctionDecl *FD) {
if (FD->hasAttr<clang::RenderScriptKernelAttr>()) {
return false;
}
if (!FD->getName().equals("root")) {
return false;
}
if (FD->getNumParams() == 0) {
// Graphics root function
return true;
}
// Check for legacy graphics root function (with single parameter).
if ((targetAPI < SLANG_ICS_TARGET_API) && (FD->getNumParams() == 1)) {
const clang::QualType &IntType = FD->getASTContext().IntTy;
if (FD->getReturnType().getCanonicalType() == IntType) {
return true;
}
}
return false;
}
bool
RSSpecialFunc::validateSpecialFuncDecl(unsigned int targetAPI,
slang::RSContext *Context,
clang::FunctionDecl const *FD) {
slangAssert(Context && FD);
bool valid = true;
const clang::ASTContext &C = FD->getASTContext();
const clang::QualType &IntType = FD->getASTContext().IntTy;
if (isGraphicsRootRSFunc(targetAPI, FD)) {
if ((targetAPI < SLANG_ICS_TARGET_API) && (FD->getNumParams() == 1)) {
// Legacy graphics root function
const clang::ParmVarDecl *PVD = FD->getParamDecl(0);
clang::QualType QT = PVD->getType().getCanonicalType();
if (QT != IntType) {
Context->ReportError(PVD->getLocation(),
"invalid parameter type for legacy "
"graphics root() function: %0")
<< PVD->getType();
valid = false;
}
}
// Graphics root function, so verify that it returns an int
if (FD->getReturnType().getCanonicalType() != IntType) {
Context->ReportError(FD->getLocation(),
"root() is required to return "
"an int for graphics usage");
valid = false;
}
} else if (isInitRSFunc(FD) || isDtorRSFunc(FD)) {
if (FD->getNumParams() != 0) {
Context->ReportError(FD->getLocation(),
"%0(void) is required to have no "
"parameters")
<< FD->getName();
valid = false;
}
if (FD->getReturnType().getCanonicalType() != C.VoidTy) {
Context->ReportError(FD->getLocation(),
"%0(void) is required to have a void "
"return type")
<< FD->getName();
valid = false;
}
} else {
slangAssert(false && "must be called on root, init or .rs.dtor function!");
}
return valid;
}
} // namespace slang
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