FilePath.cpp

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2013 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 #include "drivers/FilePath.h"
00017 
00018 namespace mbed {
00019 
00020 FilePath::FilePath(const char* file_path) : file_name(NULL), fb(NULL) {
00021     if ((file_path[0] != '/') || (file_path[1] == 0)) return;
00022 
00023     const char* file_system = &file_path[1];
00024     file_name = file_system;
00025     int len = 0;
00026     while (true) {
00027         char c = *file_name;
00028         if (c == '/') { // end of object name
00029             file_name++; // point to one char after the '/'
00030             break;
00031         }
00032         if (c == 0) { // end of object name, with no filename
00033             break;
00034         }
00035         len++;
00036         file_name++;
00037     }
00038 
00039     fb = FileBase::lookup(file_system, len);
00040 }
00041 
00042 const char* FilePath::fileName(void) {
00043     return file_name;
00044 }
00045 
00046 bool FilePath::isFileSystem(void) {
00047     if (NULL == fb)
00048         return false;
00049     return (fb->getPathType() == FileSystemPathType);
00050 }
00051 
00052 FileSystemLike* FilePath::fileSystem(void) {
00053     if (isFileSystem()) {
00054         return (FileSystemLike*)fb;
00055     }
00056     return NULL;
00057 }
00058 
00059 bool FilePath::isFile(void) {
00060     if (NULL == fb)
00061         return false;
00062     return (fb->getPathType() == FilePathType);
00063 }
00064 
00065 FileLike* FilePath::file(void) {
00066     if (isFile()) {
00067         return (FileLike*)fb;
00068     }
00069     return NULL;
00070 }
00071 
00072 bool FilePath::exists(void) {
00073     return fb != NULL;
00074 }
00075 
00076 } // namespace mbed