114 lines
3.1 KiB
C++
114 lines
3.1 KiB
C++
// Copyright 2015 The Crashpad Authors. All rights reserved.
|
|
//
|
|
// 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 "util/file/file_reader.h"
|
|
|
|
#include "base/logging.h"
|
|
#include "base/numerics/safe_conversions.h"
|
|
#include "build/build_config.h"
|
|
|
|
namespace crashpad {
|
|
|
|
namespace {
|
|
|
|
class FileReaderReadExactly final : public internal::ReadExactlyInternal {
|
|
public:
|
|
explicit FileReaderReadExactly(FileReaderInterface* file_reader)
|
|
: ReadExactlyInternal(), file_reader_(file_reader) {}
|
|
|
|
FileReaderReadExactly(const FileReaderReadExactly&) = delete;
|
|
FileReaderReadExactly& operator=(const FileReaderReadExactly&) = delete;
|
|
|
|
~FileReaderReadExactly() {}
|
|
|
|
private:
|
|
// ReadExactlyInternal:
|
|
FileOperationResult Read(void* buffer, size_t size, bool can_log) override {
|
|
DCHECK(can_log);
|
|
return file_reader_->Read(buffer, size);
|
|
}
|
|
|
|
FileReaderInterface* file_reader_; // weak
|
|
};
|
|
|
|
} // namespace
|
|
|
|
bool FileReaderInterface::ReadExactly(void* data, size_t size) {
|
|
FileReaderReadExactly read_exactly(this);
|
|
return read_exactly.ReadExactly(data, size, true);
|
|
}
|
|
|
|
WeakFileHandleFileReader::WeakFileHandleFileReader(FileHandle file_handle)
|
|
: file_handle_(file_handle) {
|
|
}
|
|
|
|
WeakFileHandleFileReader::~WeakFileHandleFileReader() {
|
|
}
|
|
|
|
FileOperationResult WeakFileHandleFileReader::Read(void* data, size_t size) {
|
|
DCHECK_NE(file_handle_, kInvalidFileHandle);
|
|
|
|
base::checked_cast<FileOperationResult>(size);
|
|
FileOperationResult rv = ReadFile(file_handle_, data, size);
|
|
if (rv < 0) {
|
|
PLOG(ERROR) << internal::kNativeReadFunctionName;
|
|
return -1;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
FileOffset WeakFileHandleFileReader::Seek(FileOffset offset, int whence) {
|
|
DCHECK_NE(file_handle_, kInvalidFileHandle);
|
|
return LoggingSeekFile(file_handle_, offset, whence);
|
|
}
|
|
|
|
FileReader::FileReader()
|
|
: file_(),
|
|
weak_file_handle_file_reader_(kInvalidFileHandle) {
|
|
}
|
|
|
|
FileReader::~FileReader() {
|
|
}
|
|
|
|
bool FileReader::Open(const base::FilePath& path) {
|
|
CHECK(!file_.is_valid());
|
|
file_.reset(LoggingOpenFileForRead(path));
|
|
if (!file_.is_valid()) {
|
|
return false;
|
|
}
|
|
|
|
weak_file_handle_file_reader_.set_file_handle(file_.get());
|
|
return true;
|
|
}
|
|
|
|
void FileReader::Close() {
|
|
CHECK(file_.is_valid());
|
|
|
|
weak_file_handle_file_reader_.set_file_handle(kInvalidFileHandle);
|
|
file_.reset();
|
|
}
|
|
|
|
FileOperationResult FileReader::Read(void* data, size_t size) {
|
|
DCHECK(file_.is_valid());
|
|
return weak_file_handle_file_reader_.Read(data, size);
|
|
}
|
|
|
|
FileOffset FileReader::Seek(FileOffset offset, int whence) {
|
|
DCHECK(file_.is_valid());
|
|
return weak_file_handle_file_reader_.Seek(offset, whence);
|
|
}
|
|
|
|
} // namespace crashpad
|