dawn-cmake/src/tint/utils/io/tmpfile_posix.cc
dan sinclair 41e4d9a34c Consistent formatting for Dawn/Tint.
This CL updates the clang format files to have a single shared format
between Dawn and Tint. The major changes are tabs are 4 spaces, lines
are 100 columns and namespaces are not indented.

Bug: dawn:1339
Change-Id: I4208742c95643998d9fd14e77a9cc558071ded39
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/87603
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
2022-05-01 14:40:55 +00:00

67 lines
1.9 KiB
C++

// 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/tint/utils/io/tmpfile.h"
#include <unistd.h>
#include <limits>
#include "src/tint/debug.h"
namespace tint::utils {
namespace {
std::string TmpFilePath(std::string ext) {
char const* dir = getenv("TMPDIR");
if (dir == nullptr) {
dir = "/tmp";
}
// mkstemps requires an `int` for the file extension name but STL represents
// size_t. Pre-C++20 there the behavior for unsigned-to-signed conversion
// (when the source value exceeds the representable range) is implementation
// defined. While such a large file extension is unlikely in practice, we
// enforce this here at runtime.
TINT_ASSERT(Utils, ext.length() <= static_cast<size_t>(std::numeric_limits<int>::max()));
std::string name = std::string(dir) + "/tint_XXXXXX" + ext;
int file = mkstemps(&name[0], static_cast<int>(ext.length()));
if (file != -1) {
close(file);
return name;
}
return "";
}
} // namespace
TmpFile::TmpFile(std::string extension) : path_(TmpFilePath(std::move(extension))) {}
TmpFile::~TmpFile() {
if (!path_.empty()) {
remove(path_.c_str());
}
}
bool TmpFile::Append(const void* data, size_t size) const {
if (auto* file = fopen(path_.c_str(), "ab")) {
fwrite(data, size, 1, file);
fclose(file);
return true;
}
return false;
}
} // namespace tint::utils