63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
// Copyright 2019 The MediaPipe Authors.
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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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// This program takes one input file and encodes its contents as a C++
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// std::string, which can be included in a C++ source file. It is similar to
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// filewrapper (and borrows some of its code), but simpler.
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#include <fstream>
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#include <iostream>
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#include <memory>
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#include "absl/strings/escaping.h"
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int main(int argc, char** argv) {
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if (argc != 2) {
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std::cerr << "usage: encode_as_c_string input_file\n";
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return 1;
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}
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const std::string input_name = argv[1];
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std::ifstream input_file(input_name,
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std::ios_base::in | std::ios_base::binary);
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if (!input_file.is_open()) {
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std::cerr << "cannot open '" << input_name << "'\n";
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return 2;
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}
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constexpr int kBufSize = 4096;
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std::unique_ptr<char[]> buf(new char[kBufSize]);
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std::cout << "\"";
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int line_len = 1;
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while (1) {
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input_file.read(buf.get(), kBufSize);
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int count = input_file.gcount();
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if (count == 0) break;
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for (int i = 0; i < count; ++i) {
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std::string out = absl::CEscape(absl::string_view(&buf[i], 1));
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if (line_len + out.size() > 79) {
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std::cout << "\"\n\"";
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line_len = 1;
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}
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std::cout << out;
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line_len += out.size();
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}
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}
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input_file.close();
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if (!input_file.eof()) {
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std::cerr << "error reading '" << input_name << "'\n";
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return 2;
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}
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std::cout << "\"\n";
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return 0;
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}
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