549 lines
15 KiB
C++
549 lines
15 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "ArrayType.h"
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#include <android-base/logging.h>
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#include <hidl-util/Formatter.h>
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#include <iostream>
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#include "ConstantExpression.h"
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namespace android {
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ArrayType::ArrayType(const Reference<Type>& elementType, ConstantExpression* size, Scope* parent)
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: Type(parent, elementType.localName()), mElementType(elementType) {
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CHECK(!elementType.isEmptyReference());
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appendDimension(size);
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}
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void ArrayType::appendDimension(ConstantExpression *size) {
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mSizes.push_back(size);
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mDefinedName = mDefinedName + "[" + size->expression() + "]";
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}
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size_t ArrayType::countDimensions() const {
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return mSizes.size();
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}
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bool ArrayType::isArray() const {
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return true;
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}
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bool ArrayType::deepCanCheckEquality(std::unordered_set<const Type*>* visited) const {
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return mElementType->canCheckEquality(visited);
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}
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const Type* ArrayType::getElementType() const {
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return mElementType.get();
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}
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std::string ArrayType::typeName() const {
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if (dimension() == 1) {
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return "array of " + mElementType->typeName();
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}
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return std::to_string(dimension()) + "d array of " + mElementType->typeName();
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}
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std::vector<const Reference<Type>*> ArrayType::getReferences() const {
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return {&mElementType};
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}
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std::vector<const ConstantExpression*> ArrayType::getConstantExpressions() const {
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std::vector<const ConstantExpression*> ret;
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ret.insert(ret.end(), mSizes.begin(), mSizes.end());
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return ret;
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}
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status_t ArrayType::resolveInheritance() {
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// Resolve for typedefs
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while (mElementType->isArray()) {
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ArrayType* innerArray = static_cast<ArrayType*>(mElementType.get());
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mSizes.insert(mSizes.end(), innerArray->mSizes.begin(), innerArray->mSizes.end());
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mElementType = innerArray->mElementType;
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}
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return Type::resolveInheritance();
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}
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status_t ArrayType::validate() const {
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CHECK(!mElementType->isArray());
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if (mElementType->isInterface()) {
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std::cerr << "ERROR: Arrays of interface types are not supported"
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<< " at " << mElementType.location() << "\n";
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return UNKNOWN_ERROR;
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}
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return Type::validate();
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}
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std::string ArrayType::getCppType(StorageMode mode,
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bool specifyNamespaces) const {
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const std::string base = mElementType->getCppStackType(specifyNamespaces);
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std::string space = specifyNamespaces ? "::android::hardware::" : "";
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std::string arrayType = space + "hidl_array<" + base;
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for (size_t i = 0; i < mSizes.size(); ++i) {
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arrayType += ", " + mSizes[i]->cppValue();
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}
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arrayType += ">";
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switch (mode) {
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case StorageMode_Stack:
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return arrayType;
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case StorageMode_Argument:
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return "const " + arrayType + "&";
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case StorageMode_Result:
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return "const " + arrayType + "*";
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}
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CHECK(!"Should not be here");
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}
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std::string ArrayType::getInternalDataCppType() const {
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std::string result = mElementType->getCppStackType();
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for (size_t i = 0; i < mSizes.size(); ++i) {
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result += "[";
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result += mSizes[i]->cppValue();
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result += "]";
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}
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return result;
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}
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std::string ArrayType::getJavaType(bool forInitializer) const {
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std::string base =
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mElementType->getJavaType(forInitializer);
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for (size_t i = 0; i < mSizes.size(); ++i) {
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base += "[";
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if (forInitializer) {
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base += mSizes[i]->javaValue();
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} else {
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base += "/* " + mSizes[i]->expression() + " */";
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}
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base += "]";
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}
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return base;
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}
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std::string ArrayType::getVtsType() const {
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return "TYPE_ARRAY";
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}
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void ArrayType::emitReaderWriter(
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Formatter &out,
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const std::string &name,
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const std::string &parcelObj,
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bool parcelObjIsPointer,
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bool isReader,
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ErrorMode mode) const {
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std::string baseType = mElementType->getCppStackType();
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const std::string parentName = "_hidl_" + name + "_parent";
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out << "size_t " << parentName << ";\n\n";
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const std::string parcelObjDeref =
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parcelObj + (parcelObjIsPointer ? "->" : ".");
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size_t numArrayElements = 1;
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for (auto size : mSizes) {
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numArrayElements *= size->castSizeT();
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}
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if (isReader) {
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out << "_hidl_err = "
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<< parcelObjDeref
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<< "readBuffer("
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<< numArrayElements
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<< " * sizeof("
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<< baseType
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<< "), &"
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<< parentName
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<< ", "
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<< " reinterpret_cast<const void **>("
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<< "&" << name
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<< "));\n\n";
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handleError(out, mode);
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} else {
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out << "_hidl_err = "
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<< parcelObjDeref
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<< "writeBuffer("
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<< name
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<< ".data(), "
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<< numArrayElements
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<< " * sizeof("
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<< baseType
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<< "), &"
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<< parentName
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<< ");\n";
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handleError(out, mode);
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}
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emitReaderWriterEmbedded(
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out,
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0 /* depth */,
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name,
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name /* sanitizedName */,
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isReader /* nameIsPointer */,
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parcelObj,
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parcelObjIsPointer,
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isReader,
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mode,
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parentName,
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"0 /* parentOffset */");
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}
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void ArrayType::emitReaderWriterEmbedded(
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Formatter &out,
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size_t depth,
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const std::string &name,
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const std::string &sanitizedName,
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bool nameIsPointer,
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const std::string &parcelObj,
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bool parcelObjIsPointer,
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bool isReader,
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ErrorMode mode,
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const std::string &parentName,
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const std::string &offsetText) const {
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if (!mElementType->needsEmbeddedReadWrite()) {
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return;
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}
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const std::string nameDeref = name + (nameIsPointer ? "->" : ".");
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std::string baseType = mElementType->getCppStackType();
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std::string iteratorName = "_hidl_index_" + std::to_string(depth);
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out << "for (size_t "
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<< iteratorName
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<< " = 0; "
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<< iteratorName
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<< " < "
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<< dimension()
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<< "; ++"
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<< iteratorName
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<< ") {\n";
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out.indent();
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mElementType->emitReaderWriterEmbedded(
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out,
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depth + 1,
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nameDeref + "data()[" + iteratorName + "]",
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sanitizedName + "_indexed",
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false /* nameIsPointer */,
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parcelObj,
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parcelObjIsPointer,
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isReader,
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mode,
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parentName,
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offsetText
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+ " + " + iteratorName + " * sizeof("
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+ baseType
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+ ")");
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out.unindent();
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out << "}\n\n";
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}
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void ArrayType::emitJavaDump(
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Formatter &out,
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const std::string &streamName,
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const std::string &name) const {
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out << streamName << ".append(java.util.Arrays."
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<< (countDimensions() > 1 ? "deepToString" : "toString")
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<< "("
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<< name
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<< "));\n";
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}
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bool ArrayType::needsEmbeddedReadWrite() const {
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return mElementType->needsEmbeddedReadWrite();
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}
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bool ArrayType::resultNeedsDeref() const {
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return true;
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}
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void ArrayType::emitJavaReaderWriter(
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Formatter &out,
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const std::string &parcelObj,
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const std::string &argName,
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bool isReader) const {
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size_t align, size;
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getAlignmentAndSize(&align, &size);
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if (isReader) {
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out << "new "
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<< getJavaType(true /* forInitializer */)
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<< ";\n";
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}
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out << "{\n";
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out.indent();
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out << "android.os.HwBlob _hidl_blob = ";
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if (isReader) {
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out << parcelObj
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<< ".readBuffer("
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<< size
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<< " /* size */);\n";
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} else {
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out << "new android.os.HwBlob("
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<< size
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<< " /* size */);\n";
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}
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emitJavaFieldReaderWriter(
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out,
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0 /* depth */,
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parcelObj,
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"_hidl_blob",
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argName,
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"0 /* offset */",
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isReader);
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if (!isReader) {
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out << parcelObj << ".writeBuffer(_hidl_blob);\n";
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}
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out.unindent();
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out << "}\n";
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}
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void ArrayType::emitJavaFieldInitializer(
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Formatter &out, const std::string &fieldName) const {
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const std::string typeName = getJavaType(false /* forInitializer */);
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const std::string fieldDeclaration = typeName + " " + fieldName;
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emitJavaFieldDefaultInitialValue(out, fieldDeclaration);
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}
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void ArrayType::emitJavaFieldDefaultInitialValue(
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Formatter &out, const std::string &declaredFieldName) const {
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out << declaredFieldName
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<< " = new "
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<< getJavaType(true /* forInitializer */)
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<< ";\n";
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}
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void ArrayType::emitJavaFieldReaderWriter(
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Formatter &out,
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size_t depth,
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const std::string &parcelName,
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const std::string &blobName,
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const std::string &fieldName,
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const std::string &offset,
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bool isReader) const {
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out << "{\n";
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out.indent();
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std::string offsetName = "_hidl_array_offset_" + std::to_string(depth);
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out << "long " << offsetName << " = " << offset << ";\n";
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const bool isPrimitiveArray = mElementType->isScalar();
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/* If the element type corresponds to a Java primitive type we can optimize
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the innermost loop by copying a linear range of memory instead of doing
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a per-element copy. As a result the outer nested loop does not include
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the final dimension. */
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const size_t loopDimensions = mSizes.size() - (isPrimitiveArray ? 1 : 0);
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std::string indexString;
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for (size_t dim = 0; dim < loopDimensions; ++dim) {
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std::string iteratorName =
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"_hidl_index_" + std::to_string(depth) + "_" + std::to_string(dim);
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out << "for (int "
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<< iteratorName
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<< " = 0; "
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<< iteratorName
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<< " < "
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<< mSizes[dim]->javaValue()
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<< "; ++"
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<< iteratorName
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<< ") {\n";
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out.indent();
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indexString += "[" + iteratorName + "]";
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}
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const bool isIndexed = (loopDimensions > 0);
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const std::string fieldNameWithCast = isIndexed
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? "(" + getJavaTypeCast(fieldName) + ")" + indexString
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: getJavaTypeCast(fieldName);
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if (isReader && mElementType->isCompoundType()) {
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mElementType->emitJavaFieldDefaultInitialValue(out, fieldNameWithCast);
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}
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if (!isPrimitiveArray) {
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mElementType->emitJavaFieldReaderWriter(
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out,
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depth + 1,
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parcelName,
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blobName,
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fieldNameWithCast,
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offsetName,
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isReader);
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size_t elementAlign, elementSize;
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mElementType->getAlignmentAndSize(&elementAlign, &elementSize);
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out << offsetName << " += " << std::to_string(elementSize) << ";\n";
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} else {
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if (isReader) {
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out << blobName
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<< ".copyTo"
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<< mElementType->getJavaSuffix()
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<< "Array("
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<< offsetName
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<< ", "
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<< fieldNameWithCast
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<< ", "
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<< mSizes.back()->javaValue()
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<< " /* size */);\n";
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} else {
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std::string elemName = "_hidl_array_item_" + std::to_string(depth);
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out << mElementType->getJavaType(false /* forInitializer */)
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<< "[] "
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<< elemName
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<< " = "
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<< fieldNameWithCast
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<< ";\n\n";
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out << "if ("
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<< elemName
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<< " == null || "
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<< elemName
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<< ".length != "
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<< mSizes.back()->javaValue()
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<< ") {\n";
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out.indent();
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out << "throw new IllegalArgumentException("
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<< "\"Array element is not of the expected length\");\n";
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out.unindent();
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out << "}\n\n";
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out << blobName
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<< ".put"
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<< mElementType->getJavaSuffix()
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<< "Array("
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<< offsetName
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<< ", "
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<< elemName
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<< ");\n";
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}
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size_t elementAlign, elementSize;
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mElementType->getAlignmentAndSize(&elementAlign, &elementSize);
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out << offsetName
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<< " += "
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<< mSizes.back()->javaValue()
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<< " * "
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<< elementSize
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<< ";\n";
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}
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for (size_t dim = 0; dim < loopDimensions; ++dim) {
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out.unindent();
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out << "}\n";
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}
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out.unindent();
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out << "}\n";
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}
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void ArrayType::emitVtsTypeDeclarations(Formatter& out) const {
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out << "type: " << getVtsType() << "\n";
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out << "vector_size: " << mSizes[0]->rawValue() << "\n";
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out << "vector_value: {\n";
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out.indent();
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// Simple array case.
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if (mSizes.size() == 1) {
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mElementType->emitVtsTypeDeclarations(out);
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} else { // Multi-dimension array case.
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for (size_t index = 1; index < mSizes.size(); index++) {
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out << "type: " << getVtsType() << "\n";
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out << "vector_size: " << mSizes[index]->rawValue() << "\n";
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out << "vector_value: {\n";
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out.indent();
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if (index == mSizes.size() - 1) {
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mElementType->emitVtsTypeDeclarations(out);
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}
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}
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}
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for (size_t index = 0; index < mSizes.size(); index++) {
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out.unindent();
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out << "}\n";
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}
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}
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bool ArrayType::deepIsJavaCompatible(std::unordered_set<const Type*>* visited) const {
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if (!mElementType->isJavaCompatible(visited)) {
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return false;
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}
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return Type::deepIsJavaCompatible(visited);
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}
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bool ArrayType::deepContainsPointer(std::unordered_set<const Type*>* visited) const {
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if (mElementType->containsPointer(visited)) {
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return true;
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}
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return Type::deepContainsPointer(visited);
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}
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void ArrayType::getAlignmentAndSize(size_t *align, size_t *size) const {
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mElementType->getAlignmentAndSize(align, size);
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for (auto sizeInDimension : mSizes) {
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(*size) *= sizeInDimension->castSizeT();
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}
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}
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size_t ArrayType::dimension() const {
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size_t numArrayElements = 1;
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for (auto size : mSizes) {
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numArrayElements *= size->castSizeT();
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}
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return numArrayElements;
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}
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} // namespace android
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