| /* |
| * Copyright (C) 2016 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 "VectorType.h" |
| |
| #include "Formatter.h" |
| |
| #include <android-base/logging.h> |
| |
| namespace android { |
| |
| VectorType::VectorType(Type *elementType) |
| : mElementType(elementType) { |
| } |
| |
| std::string VectorType::getCppType(StorageMode mode, std::string *extra) const { |
| const std::string base = |
| "::android::hardware::hidl_vec<" |
| + mElementType->getCppType(extra) |
| + ">"; |
| |
| CHECK(extra->empty()); |
| |
| switch (mode) { |
| case StorageMode_Stack: |
| return base; |
| |
| case StorageMode_Argument: |
| return "const " + base + "&"; |
| |
| case StorageMode_Result: |
| return "const " + base + "*"; |
| } |
| } |
| |
| std::string VectorType::getJavaType() const { |
| return mElementType->getJavaType() + "[]"; |
| } |
| |
| std::string VectorType::getJavaSuffix() const { |
| return mElementType->getJavaSuffix() + "Vector"; |
| } |
| |
| void VectorType::emitReaderWriter( |
| Formatter &out, |
| const std::string &name, |
| const std::string &parcelObj, |
| bool parcelObjIsPointer, |
| bool isReader, |
| ErrorMode mode) const { |
| std::string baseExtra; |
| std::string baseType = mElementType->getCppType(&baseExtra); |
| |
| const std::string parentName = "_hidl_" + name + "_parent"; |
| |
| out << "size_t " << parentName << ";\n\n"; |
| |
| const std::string parcelObjDeref = |
| parcelObj + (parcelObjIsPointer ? "->" : "."); |
| |
| if (isReader) { |
| out << name |
| << " = (const ::android::hardware::hidl_vec<" |
| << baseType |
| << "> *)" |
| << parcelObjDeref |
| << "readBuffer(&" |
| << parentName |
| << ");\n\n"; |
| |
| out << "if (" << name << " == nullptr) {\n"; |
| |
| out.indent(); |
| |
| out << "_hidl_err = ::android::UNKNOWN_ERROR;\n"; |
| handleError2(out, mode); |
| |
| out.unindent(); |
| out << "}\n\n"; |
| } else { |
| out << "_hidl_err = " |
| << parcelObjDeref |
| << "writeBuffer(&" |
| << name |
| << ", sizeof(" |
| << name |
| << "), &" |
| << parentName |
| << ");\n"; |
| |
| handleError(out, mode); |
| } |
| |
| emitReaderWriterEmbedded( |
| out, |
| name, |
| isReader /* nameIsPointer */, |
| parcelObj, |
| parcelObjIsPointer, |
| isReader, |
| mode, |
| parentName, |
| "0 /* parentOffset */"); |
| } |
| |
| void VectorType::emitReaderWriterEmbedded( |
| Formatter &out, |
| const std::string &name, |
| bool nameIsPointer, |
| const std::string &parcelObj, |
| bool parcelObjIsPointer, |
| bool isReader, |
| ErrorMode mode, |
| const std::string &parentName, |
| const std::string &offsetText) const { |
| std::string baseExtra; |
| std::string baseType = Type::getCppType(&baseExtra); |
| |
| const std::string childName = "_hidl_" + name + "_child"; |
| out << "size_t " << childName << ";\n\n"; |
| |
| emitReaderWriterEmbeddedForTypeName( |
| out, |
| name, |
| nameIsPointer, |
| parcelObj, |
| parcelObjIsPointer, |
| isReader, |
| mode, |
| parentName, |
| offsetText, |
| baseType, |
| childName); |
| |
| if (!mElementType->needsEmbeddedReadWrite()) { |
| return; |
| } |
| |
| const std::string nameDeref = name + (nameIsPointer ? "->" : "."); |
| |
| baseType = mElementType->getCppType(&baseExtra); |
| |
| out << "for (size_t _hidl_index = 0; _hidl_index < " |
| << nameDeref |
| << "size(); ++_hidl_index) {\n"; |
| |
| out.indent(); |
| |
| mElementType->emitReaderWriterEmbedded( |
| out, |
| (nameIsPointer ? "(*" + name + ")" : name) + "[_hidl_index]", |
| false /* nameIsPointer */, |
| parcelObj, |
| parcelObjIsPointer, |
| isReader, |
| mode, |
| childName, |
| "_hidl_index * sizeof(" + baseType + ")"); |
| |
| out.unindent(); |
| |
| out << "}\n\n"; |
| } |
| |
| void VectorType::emitJavaFieldInitializer( |
| Formatter &out, const std::string &fieldName) const { |
| out << "final Vector<" |
| << mElementType->getJavaWrapperType() |
| << "> " |
| << fieldName |
| << " = new Vector();\n"; |
| } |
| |
| void VectorType::emitJavaFieldReaderWriter( |
| Formatter &out, |
| const std::string &blobName, |
| const std::string &fieldName, |
| const std::string &offset, |
| bool isReader) const { |
| if (isReader) { |
| out << "{\n"; |
| out.indent(); |
| |
| out << "HwBlob childBlob = parcel.readEmbeddedBuffer(\n"; |
| out.indent(); |
| out.indent(); |
| |
| out << blobName |
| << ".handle(),\n" |
| << offset |
| << " + 0 /* offsetof(hidl_vec<T>, mBuffer) */);\n\n"; |
| |
| out.unindent(); |
| out.unindent(); |
| |
| out << fieldName << ".clear();\n"; |
| out << "long _hidl_vec_size = " |
| << blobName |
| << ".getInt64(" |
| << offset |
| << " + 8 /* offsetof(hidl_vec<T>, mSize) */);\n"; |
| |
| out << "for (int _hidl_index = 0; _hidl_index < _hidl_vec_size; " |
| << "++_hidl_index) {\n"; |
| |
| out.indent(); |
| |
| mElementType->emitJavaFieldInitializer(out, "_hidl_vec_element"); |
| |
| size_t elementAlign, elementSize; |
| mElementType->getAlignmentAndSize(&elementAlign, &elementSize); |
| |
| mElementType->emitJavaFieldReaderWriter( |
| out, |
| "childBlob", |
| "_hidl_vec_element", |
| "_hidl_index * " + std::to_string(elementSize), |
| true /* isReader */); |
| |
| out << fieldName |
| << ".add(_hidl_vec_element);\n"; |
| |
| out.unindent(); |
| |
| out << "}\n"; |
| |
| out.unindent(); |
| out << "}\n"; |
| |
| return; |
| } |
| |
| out << "{\n"; |
| out.indent(); |
| |
| out << "long _hidl_vec_size = " |
| << fieldName |
| << ".size();\n"; |
| |
| out << blobName |
| << ".putInt64(" |
| << offset |
| << " + 8 /* offsetof(hidl_vec<T>, mSize) */, _hidl_vec_size);\n"; |
| |
| out << blobName |
| << ".putBool(" |
| << offset |
| << " + 16 /* offsetof(hidl_vec<T>, mOwnsBuffer) */, false);\n"; |
| |
| size_t elementAlign, elementSize; |
| mElementType->getAlignmentAndSize(&elementAlign, &elementSize); |
| |
| // XXX make HwBlob constructor take a long instead of an int? |
| out << "HwBlob childBlob = new HwBlob((int)(_hidl_vec_size * " |
| << elementSize |
| << "));\n"; |
| |
| out << "for (int _hidl_index = 0; _hidl_index < _hidl_vec_size; " |
| << "++_hidl_index) {\n"; |
| |
| out.indent(); |
| |
| mElementType->emitJavaFieldReaderWriter( |
| out, |
| "childBlob", |
| fieldName + ".elementAt(_hidl_index)", |
| "_hidl_index * " + std::to_string(elementSize), |
| false /* isReader */); |
| |
| out.unindent(); |
| |
| out << "}\n"; |
| |
| out << blobName |
| << ".putBlob(" |
| << offset |
| << " + 0 /* offsetof(hidl_vec<T>, mBuffer) */, childBlob);\n"; |
| |
| out.unindent(); |
| out << "}\n"; |
| } |
| |
| bool VectorType::needsEmbeddedReadWrite() const { |
| return true; |
| } |
| |
| bool VectorType::resultNeedsDeref() const { |
| return true; |
| } |
| |
| status_t VectorType::emitVtsTypeDeclarations(Formatter &out) const { |
| out << "type: TYPE_VECTOR\n" << "vector_value: {\n"; |
| out.indent(); |
| status_t err = mElementType->emitVtsTypeDeclarations(out); |
| if (err != OK) { |
| return err; |
| } |
| out.unindent(); |
| out << "}\n"; |
| return OK; |
| } |
| |
| status_t VectorType::emitVtsAttributeType(Formatter &out) const { |
| out << "type: TYPE_VECTOR\n" << "vector_value: {\n"; |
| out.indent(); |
| status_t status = mElementType->emitVtsAttributeType(out); |
| if (status != OK) { |
| return status; |
| } |
| out.unindent(); |
| out << "}\n"; |
| return OK; |
| } |
| |
| bool VectorType::isJavaCompatible() const { |
| return mElementType->isJavaCompatible(); |
| } |
| |
| void VectorType::getAlignmentAndSize(size_t *align, size_t *size) const { |
| *align = 8; // hidl_vec<T> |
| *size = 24; |
| } |
| |
| } // namespace android |
| |