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/*
* 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 "StringType.h"
#include "HidlTypeAssertion.h"
#include <hidl-util/Formatter.h>
namespace android {
StringType::StringType(Scope* parent) : Type(parent) {}
bool StringType::isString() const {
return true;
}
bool StringType::deepCanCheckEquality(std::unordered_set<const Type*>* /* visited */) const {
return true;
}
std::string StringType::typeName() const {
return "string";
}
std::string StringType::getCppType(StorageMode mode,
bool specifyNamespaces) const {
const std::string base =
std::string(specifyNamespaces ? "::android::hardware::" : "")
+ "hidl_string";
switch (mode) {
case StorageMode_Stack:
return base;
case StorageMode_Argument:
return "const " + base + "&";
case StorageMode_Result:
return "const " + base + "*";
}
}
std::string StringType::getJavaType(bool /* forInitializer */) const {
return "String";
}
std::string StringType::getJavaSuffix() const {
return "String";
}
std::string StringType::getVtsType() const {
return "TYPE_STRING";
}
void StringType::emitReaderWriter(
Formatter &out,
const std::string &name,
const std::string &parcelObj,
bool parcelObjIsPointer,
bool isReader,
ErrorMode mode) const {
const std::string parentName = "_hidl_" + name + "_parent";
out << "size_t " << parentName << ";\n\n";
const std::string parcelObjDeref =
parcelObj + (parcelObjIsPointer ? "->" : ".");
if (isReader) {
out << "_hidl_err = "
<< parcelObjDeref
<< "readBuffer("
<< "sizeof(*"
<< name
<< "), &"
<< parentName
<< ", "
<< " reinterpret_cast<const void **>("
<< "&" << name
<< "));\n\n";
handleError(out, mode);
} else {
out << "_hidl_err = "
<< parcelObjDeref
<< "writeBuffer(&"
<< name
<< ", sizeof("
<< name
<< "), &"
<< parentName
<< ");\n";
handleError(out, mode);
}
emitReaderWriterEmbedded(
out,
0 /* depth */,
name,
name /* sanitizedName */,
isReader /* nameIsPointer */,
parcelObj,
parcelObjIsPointer,
isReader,
mode,
parentName,
"0 /* parentOffset */");
}
void StringType::emitReaderWriterEmbedded(
Formatter &out,
size_t /* depth */,
const std::string &name,
const std::string & /*sanitizedName*/,
bool nameIsPointer,
const std::string &parcelObj,
bool parcelObjIsPointer,
bool isReader,
ErrorMode mode,
const std::string &parentName,
const std::string &offsetText) const {
emitReaderWriterEmbeddedForTypeName(
out,
name,
nameIsPointer,
parcelObj,
parcelObjIsPointer,
isReader,
mode,
parentName,
offsetText,
"::android::hardware::hidl_string",
"" /* childName */,
"::android::hardware");
}
void StringType::emitJavaFieldInitializer(
Formatter &out, const std::string &fieldName) const {
out << "String "
<< fieldName
<< " = new String();\n";
}
void StringType::emitJavaFieldReaderWriter(
Formatter &out,
size_t /* depth */,
const std::string &parcelName,
const std::string &blobName,
const std::string &fieldName,
const std::string &offset,
bool isReader) const {
if (isReader) {
out << fieldName
<< " = "
<< blobName
<< ".getString("
<< offset
<< ");\n";
out << "\n"
<< parcelName
<< ".readEmbeddedBuffer(\n";
out.indent();
out.indent();
// hidl_string's embedded buffer is never null(able), because it defaults to a
// buffer containing an empty string.
out << fieldName << ".getBytes().length + 1,\n"
<< blobName
<< ".handle(),\n"
<< offset
<< " + 0 /* offsetof(hidl_string, mBuffer) */,"
<< "false /* nullable */);\n\n";
out.unindent();
out.unindent();
return;
}
out << blobName
<< ".putString("
<< offset
<< ", "
<< fieldName
<< ");\n";
}
bool StringType::needsEmbeddedReadWrite() const {
return true;
}
bool StringType::resultNeedsDeref() const {
return true;
}
void StringType::emitVtsTypeDeclarations(Formatter& out) const {
out << "type: " << getVtsType() << "\n";
}
static HidlTypeAssertion assertion("hidl_string", 16 /* size */);
void StringType::getAlignmentAndSize(size_t *align, size_t *size) const {
*align = 8; // hidl_string
*size = assertion.size();
}
} // namespace android