112 lines
2.5 KiB
C++
112 lines
2.5 KiB
C++
// Copyright 2016 The Chromium Embedded Framework Authors. Portions copyright
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// 2012 The Chromium Authors. All rights reserved. Use of this source code is
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// governed by a BSD-style license that can be found in the LICENSE file.
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#include "tests/unittests/file_util.h"
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#include "include/base/cef_build.h"
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#include "include/base/cef_scoped_ptr.h"
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#include "include/cef_task.h"
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#include <algorithm>
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#include <cstdio>
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#include <memory>
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namespace file_util {
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namespace {
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bool AllowFileIO() {
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if (CefCurrentlyOn(TID_UI) || CefCurrentlyOn(TID_IO)) {
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NOTREACHED() << "file IO is not allowed on the current thread";
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return false;
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}
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return true;
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}
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} // namespace
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#if defined(OS_WIN)
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const char kPathSep = '\\';
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#else
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const char kPathSep = '/';
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#endif
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bool ReadFileToString(const std::string& path, std::string* contents,
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size_t max_size) {
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if (!AllowFileIO())
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return false;
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if (contents)
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contents->clear();
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FILE* file = fopen(path.c_str(), "rb");
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if (!file)
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return false;
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const size_t kBufferSize = 1 << 16;
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scoped_ptr<char[]> buf(new char[kBufferSize]);
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size_t len;
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size_t size = 0;
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bool read_status = true;
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// Many files supplied in |path| have incorrect size (proc files etc).
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// Hence, the file is read sequentially as opposed to a one-shot read.
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while ((len = fread(buf.get(), 1, kBufferSize, file)) > 0) {
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if (contents)
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contents->append(buf.get(), std::min(len, max_size - size));
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if ((max_size - size) < len) {
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read_status = false;
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break;
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}
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size += len;
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}
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read_status = read_status && !ferror(file);
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fclose(file);
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return read_status;
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}
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int WriteFile(const std::string& path, const char* data, int size) {
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if (!AllowFileIO())
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return -1;
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FILE* file = fopen(path.c_str(), "wb");
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if (!file)
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return -1;
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int written = 0;
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do {
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size_t write = fwrite(data + written, 1, size - written, file);
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if (write == 0)
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break;
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written += write;
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} while (written < size);
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fclose(file);
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return written;
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}
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std::string JoinPath(const std::string& path1, const std::string& path2) {
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if (path1.empty() && path2.empty())
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return std::string();
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if (path1.empty())
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return path2;
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if (path2.empty())
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return path1;
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std::string result = path1;
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if (result[result.size() - 1] != kPathSep)
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result += kPathSep;
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if (path2[0] == kPathSep)
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result += path2.substr(1);
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else
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result += path2;
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return result;
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}
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} // namespace file_util
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