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// Copyright 2021 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/utils/io/tmpfile.h"
#include <stdio.h>
#include <cstdio>
namespace tint {
namespace utils {
namespace {
std::string TmpFilePath(const std::string& ext) {
char name[L_tmpnam];
// As we're adding an extension, to ensure the file is really unique, try
// creating it, failing if it already exists.
while (tmpnam_s(name, L_tmpnam - 1) == 0) {
std::string name_with_ext = std::string(name) + ext;
FILE* f = nullptr;
// The "x" arg forces the function to fail if the file already exists.
fopen_s(&f, name_with_ext.c_str(), "wbx");
if (f) {
fclose(f);
return name_with_ext;
}
}
return {};
}
} // namespace
TmpFile::TmpFile(std::string ext) : path_(TmpFilePath(ext)) {}
TmpFile::~TmpFile() {
if (!path_.empty()) {
remove(path_.c_str());
}
}
bool TmpFile::Append(const void* data, size_t size) const {
FILE* file = nullptr;
if (fopen_s(&file, path_.c_str(), "ab") != 0) {
return false;
}
fwrite(data, size, 1, file);
fclose(file);
return true;
}
} // namespace utils
} // namespace tint