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) {
00023     _name = name;
00024     _path_type = t;
00025 
00026     if (name != NULL) {
00027         // put this object at head of the list
00028         _next = _head;
00029         _head = this;
00030     } else {
00031         _next = NULL;
00032     }
00033 }
00034 
00035 FileBase::~FileBase() {
00036     if (_name != NULL) {
00037         // remove this object from the list
00038         if (_head == this) { // first in the list, so just drop me
00039             _head = _next;
00040         } else {             // find the object before me, then drop me
00041             FileBase *p = _head;
00042             while (p->_next != this) {
00043                 p = p->_next;
00044             }
00045             p->_next = _next;
00046         }
00047     }
00048 }
00049 
00050 FileBase *FileBase::lookup(const char *name, unsigned int len) {
00051     FileBase *p = _head;
00052     while (p != NULL) {
00053         /* Check that p->_name matches name and is the correct length */
00054         if (p->_name != NULL && std::strncmp(p->_name, name, len) == 0 && std::strlen(p->_name) == len) {
00055             return p;
00056         }
00057         p = p->_next;
00058     }
00059     return NULL;
00060 }
00061 
00062 FileBase *FileBase::get(int n) {
00063     FileBase *p = _head;
00064     int m = 0;
00065     while (p != NULL) {
00066         if (m == n) return p;
00067 
00068         m++;
00069         p = p->_next;
00070     }
00071     return NULL;
00072 }
00073 
00074 const char* FileBase::getName(void) {
00075     return _name;
00076 }
00077 
00078 PathType FileBase::getPathType(void) {
00079     return _path_type;
00080 }
00081 
00082 } // namespace mbed
00083