不韋 呂 / F746_SD_Player_Demo

Demo program for library named SD_PlayerSkeleton of SD card player skeleton. SD カードプレーヤのための骨組みとして使うためのライブラリ SD_PlayerSkeleton の使用例．このプログラムについては，CQ出版社インターフェース誌 2018年7月号で解説している．

Dependencies:   F746_GUI F746_SAI_IO SD_PlayerSkeleton

mbed_src_STM32F7/common/FileBase.cpp@19:3c3833ec00d2, 2017-04-09 (annotated)

Committer:
MikamiUitOpen
Date:
Sun Apr 09 12:44:17 2017 +0000
Revision:
19:3c3833ec00d2
Parent:
2:cf42e62a97dc 
20

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 2:cf42e62a97dc 1 /* mbed Microcontroller Library
MikamiUitOpen 2:cf42e62a97dc 2 * Copyright (c) 2006-2013 ARM Limited
MikamiUitOpen 2:cf42e62a97dc 3 *
MikamiUitOpen 2:cf42e62a97dc 4 * Licensed under the Apache License, Version 2.0 (the "License");
MikamiUitOpen 2:cf42e62a97dc 5 * you may not use this file except in compliance with the License.
MikamiUitOpen 2:cf42e62a97dc 6 * You may obtain a copy of the License at
MikamiUitOpen 2:cf42e62a97dc 7 *
MikamiUitOpen 2:cf42e62a97dc 8 * http://www.apache.org/licenses/LICENSE-2.0
MikamiUitOpen 2:cf42e62a97dc 9 *
MikamiUitOpen 2:cf42e62a97dc 10 * Unless required by applicable law or agreed to in writing, software
MikamiUitOpen 2:cf42e62a97dc 11 * distributed under the License is distributed on an "AS IS" BASIS,
MikamiUitOpen 2:cf42e62a97dc 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MikamiUitOpen 2:cf42e62a97dc 13 * See the License for the specific language governing permissions and
MikamiUitOpen 2:cf42e62a97dc 14 * limitations under the License.
MikamiUitOpen 2:cf42e62a97dc 15 */
MikamiUitOpen 2:cf42e62a97dc 16 #include "FileBase.h"
MikamiUitOpen 2:cf42e62a97dc 17
MikamiUitOpen 2:cf42e62a97dc 18 namespace mbed {
MikamiUitOpen 2:cf42e62a97dc 19
MikamiUitOpen 2:cf42e62a97dc 20 FileBase *FileBase::_head = NULL;
MikamiUitOpen 2:cf42e62a97dc 21
MikamiUitOpen 2:cf42e62a97dc 22 FileBase::FileBase(const char *name, PathType t) : _next(NULL),
MikamiUitOpen 2:cf42e62a97dc 23 _name(name),
MikamiUitOpen 2:cf42e62a97dc 24 _path_type(t) {
MikamiUitOpen 2:cf42e62a97dc 25 if (name != NULL) {
MikamiUitOpen 2:cf42e62a97dc 26 // put this object at head of the list
MikamiUitOpen 2:cf42e62a97dc 27 _next = _head;
MikamiUitOpen 2:cf42e62a97dc 28 _head = this;
MikamiUitOpen 2:cf42e62a97dc 29 } else {
MikamiUitOpen 2:cf42e62a97dc 30 _next = NULL;
MikamiUitOpen 2:cf42e62a97dc 31 }
MikamiUitOpen 2:cf42e62a97dc 32 }
MikamiUitOpen 2:cf42e62a97dc 33
MikamiUitOpen 2:cf42e62a97dc 34 FileBase::~FileBase() {
MikamiUitOpen 2:cf42e62a97dc 35 if (_name != NULL) {
MikamiUitOpen 2:cf42e62a97dc 36 // remove this object from the list
MikamiUitOpen 2:cf42e62a97dc 37 if (_head == this) { // first in the list, so just drop me
MikamiUitOpen 2:cf42e62a97dc 38 _head = _next;
MikamiUitOpen 2:cf42e62a97dc 39 } else { // find the object before me, then drop me
MikamiUitOpen 2:cf42e62a97dc 40 FileBase *p = _head;
MikamiUitOpen 2:cf42e62a97dc 41 while (p->_next != this) {
MikamiUitOpen 2:cf42e62a97dc 42 p = p->_next;
MikamiUitOpen 2:cf42e62a97dc 43 }
MikamiUitOpen 2:cf42e62a97dc 44 p->_next = _next;
MikamiUitOpen 2:cf42e62a97dc 45 }
MikamiUitOpen 2:cf42e62a97dc 46 }
MikamiUitOpen 2:cf42e62a97dc 47 }
MikamiUitOpen 2:cf42e62a97dc 48
MikamiUitOpen 2:cf42e62a97dc 49 FileBase *FileBase::lookup(const char *name, unsigned int len) {
MikamiUitOpen 2:cf42e62a97dc 50 FileBase *p = _head;
MikamiUitOpen 2:cf42e62a97dc 51 while (p != NULL) {
MikamiUitOpen 2:cf42e62a97dc 52 /* Check that p->_name matches name and is the correct length */
MikamiUitOpen 2:cf42e62a97dc 53 if (p->_name != NULL && std::strncmp(p->_name, name, len) == 0 && std::strlen(p->_name) == len) {
MikamiUitOpen 2:cf42e62a97dc 54 return p;
MikamiUitOpen 2:cf42e62a97dc 55 }
MikamiUitOpen 2:cf42e62a97dc 56 p = p->_next;
MikamiUitOpen 2:cf42e62a97dc 57 }
MikamiUitOpen 2:cf42e62a97dc 58 return NULL;
MikamiUitOpen 2:cf42e62a97dc 59 }
MikamiUitOpen 2:cf42e62a97dc 60
MikamiUitOpen 2:cf42e62a97dc 61 FileBase *FileBase::get(int n) {
MikamiUitOpen 2:cf42e62a97dc 62 FileBase *p = _head;
MikamiUitOpen 2:cf42e62a97dc 63 int m = 0;
MikamiUitOpen 2:cf42e62a97dc 64 while (p != NULL) {
MikamiUitOpen 2:cf42e62a97dc 65 if (m == n) return p;
MikamiUitOpen 2:cf42e62a97dc 66
MikamiUitOpen 2:cf42e62a97dc 67 m++;
MikamiUitOpen 2:cf42e62a97dc 68 p = p->_next;
MikamiUitOpen 2:cf42e62a97dc 69 }
MikamiUitOpen 2:cf42e62a97dc 70 return NULL;
MikamiUitOpen 2:cf42e62a97dc 71 }
MikamiUitOpen 2:cf42e62a97dc 72
MikamiUitOpen 2:cf42e62a97dc 73 const char* FileBase::getName(void) {
MikamiUitOpen 2:cf42e62a97dc 74 return _name;
MikamiUitOpen 2:cf42e62a97dc 75 }
MikamiUitOpen 2:cf42e62a97dc 76
MikamiUitOpen 2:cf42e62a97dc 77 PathType FileBase::getPathType(void) {
MikamiUitOpen 2:cf42e62a97dc 78 return _path_type;
MikamiUitOpen 2:cf42e62a97dc 79 }
MikamiUitOpen 2:cf42e62a97dc 80
MikamiUitOpen 2:cf42e62a97dc 81 } // namespace mbed
MikamiUitOpen 2:cf42e62a97dc 82