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// 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 <new>
#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 (std::nothrow) char[temp_file_name_template_str.length() + 1];
if (!temp_file_name_template) {
return nullptr;
}
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
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