mirror of https://github.com/ARMmbed/mbed-os.git
139 lines
4.0 KiB
C++
139 lines
4.0 KiB
C++
/* mbed Microcontroller Library
|
|
* Copyright (c) 2015 ARM Limited
|
|
*
|
|
* 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 FILE_H
|
|
#define FILE_H
|
|
|
|
#include "filesystem/FileSystem.h"
|
|
#include "platform/FileHandle.h"
|
|
|
|
namespace mbed {
|
|
/** \addtogroup filesystem */
|
|
/** @{*/
|
|
|
|
|
|
/** File class
|
|
*/
|
|
class File : public FileHandle {
|
|
public:
|
|
/** Create an uninitialized file
|
|
*
|
|
* Must call open to initialize the file on a file system
|
|
*/
|
|
File();
|
|
|
|
/** Create a file on a filesystem
|
|
*
|
|
* Creates and opens a file on a filesystem
|
|
*
|
|
* @param fs Filesystem as target for the file
|
|
* @param path The name of the file to open
|
|
* @param flags The flags to open the file in, one of O_RDONLY, O_WRONLY, O_RDWR,
|
|
* bitwise or'd with one of O_CREAT, O_TRUNC, O_APPEND
|
|
*/
|
|
File(FileSystem *fs, const char *path, int flags = O_RDONLY);
|
|
|
|
/** Destroy a file
|
|
*
|
|
* Closes file if the file is still open
|
|
*/
|
|
virtual ~File();
|
|
|
|
/** Open a file on the filesystem
|
|
*
|
|
* @param fs Filesystem as target for the file
|
|
* @param path The name of the file to open
|
|
* @param flags The flags to open the file in, one of O_RDONLY, O_WRONLY, O_RDWR,
|
|
* bitwise or'd with one of O_CREAT, O_TRUNC, O_APPEND
|
|
* @return 0 on success, negative error code on failure
|
|
*/
|
|
virtual int open(FileSystem *fs, const char *path, int flags=O_RDONLY);
|
|
|
|
/** Close a file
|
|
*
|
|
* @return 0 on success, negative error code on failure
|
|
*/
|
|
virtual int close();
|
|
|
|
/** Read the contents of a file into a buffer
|
|
*
|
|
* @param buffer The buffer to read in to
|
|
* @param size The number of bytes to read
|
|
* @return The number of bytes read, 0 at end of file, negative error on failure
|
|
*/
|
|
|
|
virtual ssize_t read(void *buffer, size_t size);
|
|
|
|
/** Write the contents of a buffer to a file
|
|
*
|
|
* @param buffer The buffer to write from
|
|
* @param size The number of bytes to write
|
|
* @return The number of bytes written, negative error on failure
|
|
*/
|
|
virtual ssize_t write(const void *buffer, size_t size);
|
|
|
|
/** Flush any buffers associated with the file
|
|
*
|
|
* @return 0 on success, negative error code on failure
|
|
*/
|
|
virtual int sync();
|
|
|
|
/** Check if the file in an interactive terminal device
|
|
*
|
|
* @return True if the file is a terminal
|
|
*/
|
|
virtual int isatty();
|
|
|
|
/** Move the file position to a given offset from from a given location
|
|
*
|
|
* @param offset The offset from whence to move to
|
|
* @param whence The start of where to seek
|
|
* SEEK_SET to start from beginning of file,
|
|
* SEEK_CUR to start from current position in file,
|
|
* SEEK_END to start from end of file
|
|
* @return The new offset of the file
|
|
*/
|
|
virtual off_t seek(off_t offset, int whence = SEEK_SET);
|
|
|
|
/** Get the file position of the file
|
|
*
|
|
* @return The current offset in the file
|
|
*/
|
|
virtual off_t tell();
|
|
|
|
/** Rewind the file position to the beginning of the file
|
|
*
|
|
* @note This is equivalent to file_seek(file, 0, FS_SEEK_SET)
|
|
*/
|
|
virtual void rewind();
|
|
|
|
/** Get the size of the file
|
|
*
|
|
* @return Size of the file in bytes
|
|
*/
|
|
virtual off_t size();
|
|
|
|
private:
|
|
FileSystem *_fs;
|
|
fs_file_t _file;
|
|
};
|
|
|
|
|
|
/** @}*/
|
|
} // namespace mbed
|
|
|
|
#endif
|