55 lines
1.9 KiB
C
55 lines
1.9 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.
|
|||
|
|
|
|||
|
|
#ifndef CRASHPAD_UTIL_FILE_FILE_SEEKER_H_
|
|||
|
|
#define CRASHPAD_UTIL_FILE_FILE_SEEKER_H_
|
|||
|
|
|
|||
|
|
#include "util/file/file_io.h"
|
|||
|
|
|
|||
|
|
namespace crashpad {
|
|||
|
|
|
|||
|
|
//! \brief An interface to seek in files and other file-like objects with
|
|||
|
|
//! semantics matching the underlying platform (POSIX or Windows).
|
|||
|
|
class FileSeekerInterface {
|
|||
|
|
public:
|
|||
|
|
//! \brief Wraps LoggingSeekFile() or provides an alternate implementation
|
|||
|
|
//! with identical semantics.
|
|||
|
|
//!
|
|||
|
|
//! \return The return value of LoggingSeekFile(). `-1` on failure,
|
|||
|
|
//! with an error message logged.
|
|||
|
|
virtual FileOffset Seek(FileOffset offset, int whence) = 0;
|
|||
|
|
|
|||
|
|
//! \brief Wraps Seek(), using `SEEK_CUR` to obtain the file’s current
|
|||
|
|
//! position.
|
|||
|
|
//!
|
|||
|
|
//! \return The file’s current position on success. `-1` on failure, with an
|
|||
|
|
//! error message logged.
|
|||
|
|
FileOffset SeekGet();
|
|||
|
|
|
|||
|
|
//! \brief Wraps Seek(), using `SEEK_SET`, ensuring that the seek succeeded
|
|||
|
|
//! and the file is positioned as desired.
|
|||
|
|
//!
|
|||
|
|
//! \return `true` if the operation succeeded, `false` if it failed, with an
|
|||
|
|
//! error message logged. A failure to reposition the file as desired is
|
|||
|
|
//! treated as a failure.
|
|||
|
|
bool SeekSet(FileOffset offset);
|
|||
|
|
|
|||
|
|
protected:
|
|||
|
|
~FileSeekerInterface() {}
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
} // namespace crashpad
|
|||
|
|
|
|||
|
|
#endif // CRASHPAD_UTIL_FILE_FILE_SEEKER_H_
|