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/*
* Copyright (C) 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 "code_writer.h"
#include "logging.h"
#include <stdarg.h>
#include <fstream>
#include <iostream>
#include <sstream>
#include <unordered_map>
#include <vector>
namespace android {
namespace aidl {
CodeWriter::CodeWriter(std::unique_ptr<std::ostream> ostream) : ostream_(std::move(ostream)) {}
std::string CodeWriter::ApplyIndent(const std::string& str) {
std::string output;
if (!start_of_line_ || str == "\n") {
output = str;
} else {
output = std::string(indent_level_ * 2, ' ') + str;
}
start_of_line_ = !output.empty() && output.back() == '\n';
return output;
}
bool CodeWriter::WriteString(const std::string& str) {
// extract lines. empty line is preserved.
std::vector<std::string> lines;
size_t pos = 0;
while (pos < str.size()) {
size_t line_end = str.find('\n', pos);
if (line_end != std::string::npos) {
lines.push_back(str.substr(pos, (line_end - pos) + 1));
pos = line_end + 1;
} else {
lines.push_back(str.substr(pos));
break;
}
}
std::string indented;
for (const auto& line : lines) {
indented.append(ApplyIndent(line));
}
(*ostream_) << indented;
return !ostream_->fail();
}
void CodeWriter::Indent() {
indent_level_++;
}
void CodeWriter::Dedent() {
AIDL_FATAL_IF(indent_level_ <= 0, "Mismatched dedent");
indent_level_--;
}
bool CodeWriter::Close() {
if (ostream_.get()->rdbuf() != std::cout.rdbuf()) {
// if the steam is for file (not stdout), do the close.
static_cast<std::fstream*>(ostream_.get())->close();
return !ostream_->fail();
}
return true;
}
CodeWriter& CodeWriter::operator<<(const char* s) {
Write("%s", s);
return *this;
}
CodeWriter& CodeWriter::operator<<(const std::string& str) {
Write("%s", str.c_str());
return *this;
}
CodeWriterPtr CodeWriter::ForFile(const std::string& filename) {
std::unique_ptr<std::ostream> stream;
if (filename == "-") {
stream = std::unique_ptr<std::ostream>(new std::ostream(std::cout.rdbuf()));
} else {
stream = std::unique_ptr<std::ostream>(
new std::fstream(filename, std::fstream::out | std::fstream::binary));
}
return CodeWriterPtr(new CodeWriter(std::move(stream)));
}
CodeWriterPtr CodeWriter::ForString(std::string* buf) {
// This class is defined inside this static function of CodeWriter
// in order to have access to private constructor and private member
// ostream_.
class StringCodeWriter : public CodeWriter {
public:
StringCodeWriter(std::string* buf)
: CodeWriter(std::unique_ptr<std::ostream>(new std::stringstream())), buf_(buf) {}
~StringCodeWriter() override { Close(); }
bool Close() override {
// extract whats written to the stringstream to the external buffer.
// we are sure that ostream_ is indeed stringstream.
*buf_ = static_cast<std::stringstream*>(ostream_.get())->str();
return true;
}
private:
std::string* buf_;
};
return CodeWriterPtr(new StringCodeWriter(buf));
}
std::string QuotedEscape(const std::string& str) {
std::string result;
result += '"';
static const std::unordered_map<char, std::string> escape = {
{'"', "\\\""}, {'\\', "\\\\"}, {'\n', "\\n"}, {'\r', "\\r"}, {'\t', "\\t"}, {'\v', "\\v"},
};
for (auto c : str) {
auto it = escape.find(c);
if (it != escape.end()) {
result += it->second;
} else {
result += c;
}
}
result += '"';
return result;
}
} // namespace aidl
} // namespace android
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