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 {
00022     // skip slashes
00023     file_path += strspn(file_path, "/");
00024 
00025     const char *file_system = file_path;
00026     file_name = file_system;
00027     int len = 0;
00028     while (true) {
00029         char c = *file_name;
00030         if (c == '/') { // end of object name
00031             file_name++; // point to one char after the '/'
00032             break;
00033         }
00034         if (c == 0) { // end of object name, with no filename
00035             break;
00036         }
00037         len++;
00038         file_name++;
00039     }
00040 
00041     MBED_ASSERT(len != 0);
00042     fb = FileBase::lookup(file_system, len);
00043 }
00044 
00045 const char *FilePath::fileName(void)
00046 {
00047     return file_name;
00048 }
00049 
00050 bool FilePath::isFileSystem(void)
00051 {
00052     if (NULL == fb) {
00053         return false;
00054     }
00055     return (fb->getPathType() == FileSystemPathType);
00056 }
00057 
00058 FileSystemLike *FilePath::fileSystem(void)
00059 {
00060     if (isFileSystem()) {
00061         return static_cast<FileSystemLike *>(fb);
00062     }
00063     return NULL;
00064 }
00065 
00066 bool FilePath::isFile(void)
00067 {
00068     if (NULL == fb) {
00069         return false;
00070     }
00071     return (fb->getPathType() == FilePathType);
00072 }
00073 
00074 FileLike *FilePath::file(void)
00075 {
00076     if (isFile()) {
00077         return (FileLike *)fb;
00078     }
00079     return NULL;
00080 }
00081 
00082 bool FilePath::exists(void)
00083 {
00084     return fb != NULL;
00085 }
00086 
00087 } // namespace mbed