a bit change in FATFileSystem
Fork of FATFileSystem by
Diff: FATFileHandle.cpp
- Revision:
- 1:46ce1e16c870
- Child:
- 2:b6669c987c8e
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/FATFileHandle.cpp Tue Nov 27 17:31:18 2012 +0000 @@ -0,0 +1,90 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2012 ARM Limited + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +#include "ff.h" +#include "ffconf.h" +#include "debug.h" + +#include "FATFileHandle.h" + +FATFileHandle::FATFileHandle(FIL fh) { + _fh = fh; +} + +int FATFileHandle::close() { + int retval = f_close(&_fh); + delete this; + return retval; +} + +ssize_t FATFileHandle::write(const void* buffer, size_t length) { + UINT n; + FRESULT res = f_write(&_fh, buffer, length, &n); + if (res) { + debug_if(FFS_DBG, "f_write() failed: %d", res); + return -1; + } + return n; +} + +ssize_t FATFileHandle::read(void* buffer, size_t length) { + debug_if(FFS_DBG, "read(%d)\n", length); + UINT n; + FRESULT res = f_read(&_fh, buffer, length, &n); + if (res) { + debug_if(FFS_DBG, "f_read() failed: %d\n", res); + return -1; + } + return n; +} + +int FATFileHandle::isatty() { + return 0; +} + +off_t FATFileHandle::lseek(off_t position, int whence) { + if (whence == SEEK_END) { + position += _fh.fsize; + } else if(whence==SEEK_CUR) { + position += _fh.fptr; + } + FRESULT res = f_lseek(&_fh, position); + if (res) { + debug_if(FFS_DBG, "lseek failed: %d\n", res); + return -1; + } else { + debug_if(FFS_DBG, "lseek OK, returning %i\n", _fh.fptr); + return _fh.fptr; + } +} + +int FATFileHandle::fsync() { + FRESULT res = f_sync(&_fh); + if (res) { + debug_if(FFS_DBG, "f_sync() failed: %d\n", res); + return -1; + } + return 0; +} + +off_t FATFileHandle::flen() { + return _fh.fsize; +}