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File.cpp
00001 /* mbed Microcontroller Library 00002 * Copyright (c) 2015 ARM Limited 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00017 #include "File.h" 00018 #include "mbed.h" 00019 #include <errno.h> 00020 00021 00022 File::File() 00023 : _fs(0), _file(0) 00024 { 00025 } 00026 00027 File::File(FileSystem *fs, const char *path, int flags) 00028 : _fs(0), _file(0) 00029 { 00030 open(fs, path, flags); 00031 } 00032 00033 File::~File() 00034 { 00035 if (_fs) { 00036 close(); 00037 } 00038 } 00039 00040 int File::open(FileSystem *fs, const char *path, int flags) 00041 { 00042 if (_fs) { 00043 return -EINVAL; 00044 } 00045 00046 int err = fs->file_open(&_file, path, flags); 00047 if (!err) { 00048 _fs = fs; 00049 } 00050 00051 return err; 00052 } 00053 00054 int File::close() 00055 { 00056 if (!_fs) { 00057 return -EINVAL; 00058 } 00059 00060 int err = _fs->file_close(_file); 00061 _fs = 0; 00062 return err; 00063 } 00064 00065 ssize_t File::read(void *buffer, size_t len) 00066 { 00067 MBED_ASSERT(_fs); 00068 return _fs->file_read(_file, buffer, len); 00069 } 00070 00071 ssize_t File::write(const void *buffer, size_t len) 00072 { 00073 MBED_ASSERT(_fs); 00074 return _fs->file_write(_file, buffer, len); 00075 } 00076 00077 int File::sync() 00078 { 00079 MBED_ASSERT(_fs); 00080 return _fs->file_sync(_file); 00081 } 00082 00083 int File::isatty() 00084 { 00085 MBED_ASSERT(_fs); 00086 return _fs->file_isatty(_file); 00087 } 00088 00089 off_t File::seek(off_t offset, int whence) 00090 { 00091 MBED_ASSERT(_fs); 00092 return _fs->file_seek(_file, offset, whence); 00093 } 00094 00095 off_t File::tell() 00096 { 00097 MBED_ASSERT(_fs); 00098 return _fs->file_tell(_file); 00099 } 00100 00101 void File::rewind() 00102 { 00103 MBED_ASSERT(_fs); 00104 return _fs->file_rewind(_file); 00105 } 00106 00107 off_t File::size() 00108 { 00109 MBED_ASSERT(_fs); 00110 return _fs->file_size(_file); 00111 } 00112
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