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103 lines
2.5 KiB
103 lines
2.5 KiB
// Copyright 2020 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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#include "base/FileUtils.h"
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#include "base/EintrWrapper.h"
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#include <assert.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include "msvc.h"
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#ifdef _MSC_VER
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//#include "msvc-posix.h"
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#else
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#include <unistd.h>
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#endif
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#ifdef _WIN32
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#include <io.h>
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#endif
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#include <fstream>
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#include <sstream>
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#include <string>
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#include <utility>
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namespace android {
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bool readFileIntoString(int fd, std::string* file_contents) {
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#ifdef _MSC_VER
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if (fd < 0) return false; // msvc does not handle fd -1 very well.
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#endif
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off_t size = lseek(fd, 0, SEEK_END);
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if (size == (off_t)-1) {
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return false;
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}
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off_t err = lseek(fd, 0, SEEK_SET);
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if (err == (off_t)-1) {
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return false;
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}
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std::string buf((size_t)size, '\0');
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ssize_t result = HANDLE_EINTR(read(fd, &buf[0], size));
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if (result != size) {
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return false;
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}
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*file_contents = std::move(buf);
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return true;
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}
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bool writeStringToFile(int fd, const std::string& file_contents) {
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#ifdef _MSC_VER
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// msvc does not handle fd -1 very well.
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if (fd < 0) return false;
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ssize_t result = HANDLE_EINTR(
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_write(fd, file_contents.c_str(), file_contents.size()));
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#else
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ssize_t result = HANDLE_EINTR(
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write(fd, file_contents.c_str(), file_contents.size()));
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#endif
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if (result != (ssize_t)file_contents.size()) {
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return false;
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}
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return true;
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}
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base::Optional<std::string> readFileIntoString(const std::string& name) {
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std::ifstream is(name, std::ios_base::binary);
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if (!is) {
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return {};
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}
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std::ostringstream ss;
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ss << is.rdbuf();
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return ss.str();
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}
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bool setFileSize(int fd, int64_t size) {
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#ifdef _WIN32
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#ifdef _MSC_VER
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if (fd < 0) return false; // msvc does not handle fd -1 very well.
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#endif
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return _chsize_s(fd, size) == 0;
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#else
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return ftruncate(fd, size) == 0;
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#endif
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}
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} // namespace android
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