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 "platform/FilePath.h"
00017 
00018 namespace mbed {
00019 
00020 FilePath::FilePath(const char* file_path) : file_name(NULL), fb(NULL) {
00021     // skip slashes
00022     file_path += strspn(file_path, "/");
00023 
00024     const char* file_system = file_path;
00025     file_name = file_system;
00026     int len = 0;
00027     while (true) {
00028         char c = *file_name;
00029         if (c == '/') { // end of object name
00030             file_name++; // point to one char after the '/'
00031             break;
00032         }
00033         if (c == 0) { // end of object name, with no filename
00034             break;
00035         }
00036         len++;
00037         file_name++;
00038     }
00039 
00040     MBED_ASSERT(len != 0);
00041     fb = FileBase::lookup(file_system, len);
00042 }
00043 
00044 const char* FilePath::fileName(void) {
00045     return file_name;
00046 }
00047 
00048 bool FilePath::isFileSystem(void) {
00049     if (NULL == fb)
00050         return false;
00051     return (fb->getPathType() == FileSystemPathType);
00052 }
00053 
00054 FileSystemLike* FilePath::fileSystem(void) {
00055     if (isFileSystem()) {
00056         return static_cast<FileSystemLike*>(fb);
00057     }
00058     return NULL;
00059 }
00060 
00061 bool FilePath::isFile(void) {
00062     if (NULL == fb)
00063         return false;
00064     return (fb->getPathType() == FilePathType);
00065 }
00066 
00067 FileLike* FilePath::file(void) {
00068     if (isFile()) {
00069         return (FileLike*)fb;
00070     }
00071     return NULL;
00072 }
00073 
00074 bool FilePath::exists(void) {
00075     return fb != NULL;
00076 }
00077 
00078 } // namespace mbed