FileBase.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 "FileBase.h"
00017 
00018 namespace mbed {
00019 
00020 FileBase *FileBase::_head = NULL;
00021 
00022 FileBase::FileBase(const char *name, PathType t) : _next(NULL),
00023                                                    _name(name),
00024                                                    _path_type(t) {
00025     if (name != NULL) {
00026         // put this object at head of the list
00027         _next = _head;
00028         _head = this;
00029     } else {
00030         _next = NULL;
00031     }
00032 }
00033 
00034 FileBase::~FileBase() {
00035     if (_name != NULL) {
00036         // remove this object from the list
00037         if (_head == this) { // first in the list, so just drop me
00038             _head = _next;
00039         } else {             // find the object before me, then drop me
00040             FileBase *p = _head;
00041             while (p->_next != this) {
00042                 p = p->_next;
00043             }
00044             p->_next = _next;
00045         }
00046     }
00047 }
00048 
00049 FileBase *FileBase::lookup(const char *name, unsigned int len) {
00050     FileBase *p = _head;
00051     while (p != NULL) {
00052         /* Check that p->_name matches name and is the correct length */
00053         if (p->_name != NULL && std::strncmp(p->_name, name, len) == 0 && std::strlen(p->_name) == len) {
00054             return p;
00055         }
00056         p = p->_next;
00057     }
00058     return NULL;
00059 }
00060 
00061 FileBase *FileBase::get(int n) {
00062     FileBase *p = _head;
00063     int m = 0;
00064     while (p != NULL) {
00065         if (m == n) return p;
00066 
00067         m++;
00068         p = p->_next;
00069     }
00070     return NULL;
00071 }
00072 
00073 const char* FileBase::getName(void) {
00074     return _name;
00075 }
00076 
00077 PathType FileBase::getPathType(void) {
00078     return _path_type;
00079 }
00080 
00081 } // namespace mbed
00082