// Copyright (c) 2016 The WebM project authors. All Rights Reserved.//// Use of this source code is governed by a BSD-style license// that can be found in the LICENSE file in the root of the source// tree. An additional intellectual property rights grant can be found// in the file PATENTS.  All contributing project authors may// be found in the AUTHORS file in the root of the source tree.#include "common/file_util.h" #include <sys/stat.h>#ifndef _MSC_VER#include <unistd.h>  // close()#endif #include <cstdio>#include <cstdlib>#include <cstring>#include <fstream>#include <ios>#include <string> namespace libwebm { std::string GetTempFileName() {#if !defined _MSC_VER && !defined __MINGW32__  std::string temp_file_name_template_str =      std::string(std::getenv("TEST_TMPDIR") ? std::getenv("TEST_TMPDIR")                                             : ".") +      "/libwebm_temp.XXXXXX";  char* temp_file_name_template =      new char[temp_file_name_template_str.length() + 1];  memset(temp_file_name_template, 0, temp_file_name_template_str.length() + 1);  temp_file_name_template_str.copy(temp_file_name_template,                                   temp_file_name_template_str.length(), 0);  int fd = mkstemp(temp_file_name_template);  std::string temp_file_name =      (fd != -1) ? std::string(temp_file_name_template) : std::string();  delete[] temp_file_name_template;  if (fd != -1) {    close(fd);  }  return temp_file_name;#else  char tmp_file_name[_MAX_PATH];#if defined _MSC_VER || defined MINGW_HAS_SECURE_API  errno_t err = tmpnam_s(tmp_file_name);#else  char* fname_pointer = tmpnam(tmp_file_name);  int err = (fname_pointer == &tmp_file_name[0]) ? 0 : -1;#endif  if (err == 0) {    return std::string(tmp_file_name);  }  return std::string();#endif} uint64_t GetFileSize(const std::string& file_name) {  uint64_t file_size = 0;#ifndef _MSC_VER  struct stat st;  st.st_size = 0;  if (stat(file_name.c_str(), &st) == 0) {#else  struct _stat st;  st.st_size = 0;  if (_stat(file_name.c_str(), &st) == 0) {#endif    file_size = st.st_size;  }  return file_size;} bool GetFileContents(const std::string& file_name, std::string* contents) {  std::ifstream file(file_name.c_str());  *contents = std::string(static_cast<size_t>(GetFileSize(file_name)), 0);  if (file.good() && contents->size()) {    file.read(&(*contents)[0], contents->size());  }  return !file.fail();} TempFileDeleter::TempFileDeleter() { file_name_ = GetTempFileName(); } TempFileDeleter::~TempFileDeleter() {  std::ifstream file(file_name_.c_str());  if (file.good()) {    file.close();    std::remove(file_name_.c_str());  }} }  // namespace libwebm