不韋 呂 / F746_SD_BitmapViewer

microSD カードのビットマップ･ファイルのビュアー．画像の最大値　縦：272ピクセル，横：480ピクセル． Bitmap file viewer for microSD card. Maximum size Vertical: 272 pixels, Horizontal: 480.

Dependencies:   SDFileSystem_Warning_Fixed F746_GUI

mbed_src_STM32F7/common/FileSystemLike.cpp@1:bb146d5fe9aa, 2018-10-23 (annotated)

Committer:
MikamiUitOpen
Date:
Tue Oct 23 11:51:47 2018 +0000
Revision:
1:bb146d5fe9aa
Parent:
0:f62ffd3644bf 
2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:f62ffd3644bf 1 /* mbed Microcontroller Library
MikamiUitOpen 0:f62ffd3644bf 2 * Copyright (c) 2006-2013 ARM Limited
MikamiUitOpen 0:f62ffd3644bf 3 *
MikamiUitOpen 0:f62ffd3644bf 4 * Licensed under the Apache License, Version 2.0 (the "License");
MikamiUitOpen 0:f62ffd3644bf 5 * you may not use this file except in compliance with the License.
MikamiUitOpen 0:f62ffd3644bf 6 * You may obtain a copy of the License at
MikamiUitOpen 0:f62ffd3644bf 7 *
MikamiUitOpen 0:f62ffd3644bf 8 * http://www.apache.org/licenses/LICENSE-2.0
MikamiUitOpen 0:f62ffd3644bf 9 *
MikamiUitOpen 0:f62ffd3644bf 10 * Unless required by applicable law or agreed to in writing, software
MikamiUitOpen 0:f62ffd3644bf 11 * distributed under the License is distributed on an "AS IS" BASIS,
MikamiUitOpen 0:f62ffd3644bf 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MikamiUitOpen 0:f62ffd3644bf 13 * See the License for the specific language governing permissions and
MikamiUitOpen 0:f62ffd3644bf 14 * limitations under the License.
MikamiUitOpen 0:f62ffd3644bf 15 */
MikamiUitOpen 0:f62ffd3644bf 16 #include "FileSystemLike.h"
MikamiUitOpen 0:f62ffd3644bf 17
MikamiUitOpen 0:f62ffd3644bf 18 namespace mbed {
MikamiUitOpen 0:f62ffd3644bf 19
MikamiUitOpen 0:f62ffd3644bf 20 class BaseDirHandle : public DirHandle {
MikamiUitOpen 0:f62ffd3644bf 21 public:
MikamiUitOpen 0:f62ffd3644bf 22 /*
MikamiUitOpen 0:f62ffd3644bf 23 We keep track of our current location as the n'th object in the
MikamiUitOpen 0:f62ffd3644bf 24 FileSystemLike list. Using a Base* instead would cause problems if that
MikamiUitOpen 0:f62ffd3644bf 25 object were to be destroyed between readdirs.
MikamiUitOpen 0:f62ffd3644bf 26 Using this method does mean though that destroying/creating objects can
MikamiUitOpen 0:f62ffd3644bf 27 give unusual results from readdir.
MikamiUitOpen 0:f62ffd3644bf 28 */
MikamiUitOpen 0:f62ffd3644bf 29 off_t n;
MikamiUitOpen 0:f62ffd3644bf 30 struct dirent cur_entry;
MikamiUitOpen 0:f62ffd3644bf 31
MikamiUitOpen 0:f62ffd3644bf 32 BaseDirHandle() : n(0), cur_entry() {
MikamiUitOpen 0:f62ffd3644bf 33 }
MikamiUitOpen 0:f62ffd3644bf 34
MikamiUitOpen 0:f62ffd3644bf 35 virtual int closedir() {
MikamiUitOpen 0:f62ffd3644bf 36 delete this;
MikamiUitOpen 0:f62ffd3644bf 37 return 0;
MikamiUitOpen 0:f62ffd3644bf 38 }
MikamiUitOpen 0:f62ffd3644bf 39
MikamiUitOpen 0:f62ffd3644bf 40 virtual struct dirent *readdir() {
MikamiUitOpen 0:f62ffd3644bf 41 FileBase *ptr = FileBase::get(n);
MikamiUitOpen 0:f62ffd3644bf 42 if (ptr == NULL) return NULL;
MikamiUitOpen 0:f62ffd3644bf 43
MikamiUitOpen 0:f62ffd3644bf 44 /* Increment n, so next readdir gets the next item */
MikamiUitOpen 0:f62ffd3644bf 45 n++;
MikamiUitOpen 0:f62ffd3644bf 46
MikamiUitOpen 0:f62ffd3644bf 47 /* Setup cur entry and return a pointer to it */
MikamiUitOpen 0:f62ffd3644bf 48 std::strncpy(cur_entry.d_name, ptr->getName(), NAME_MAX);
MikamiUitOpen 0:f62ffd3644bf 49 return &cur_entry;
MikamiUitOpen 0:f62ffd3644bf 50 }
MikamiUitOpen 0:f62ffd3644bf 51
MikamiUitOpen 0:f62ffd3644bf 52 virtual off_t telldir() {
MikamiUitOpen 0:f62ffd3644bf 53 return n;
MikamiUitOpen 0:f62ffd3644bf 54 }
MikamiUitOpen 0:f62ffd3644bf 55
MikamiUitOpen 0:f62ffd3644bf 56 virtual void seekdir(off_t offset) {
MikamiUitOpen 0:f62ffd3644bf 57 n = offset;
MikamiUitOpen 0:f62ffd3644bf 58 }
MikamiUitOpen 0:f62ffd3644bf 59
MikamiUitOpen 0:f62ffd3644bf 60 virtual void rewinddir() {
MikamiUitOpen 0:f62ffd3644bf 61 n = 0;
MikamiUitOpen 0:f62ffd3644bf 62 }
MikamiUitOpen 0:f62ffd3644bf 63 };
MikamiUitOpen 0:f62ffd3644bf 64
MikamiUitOpen 0:f62ffd3644bf 65 FileSystemLike::FileSystemLike(const char *name) : FileBase(name, FileSystemPathType) {
MikamiUitOpen 0:f62ffd3644bf 66
MikamiUitOpen 0:f62ffd3644bf 67 }
MikamiUitOpen 0:f62ffd3644bf 68
MikamiUitOpen 0:f62ffd3644bf 69 FileSystemLike::~FileSystemLike() {
MikamiUitOpen 0:f62ffd3644bf 70
MikamiUitOpen 0:f62ffd3644bf 71 }
MikamiUitOpen 0:f62ffd3644bf 72
MikamiUitOpen 0:f62ffd3644bf 73 DirHandle *FileSystemLike::opendir() {
MikamiUitOpen 0:f62ffd3644bf 74 return new BaseDirHandle();
MikamiUitOpen 0:f62ffd3644bf 75 }
MikamiUitOpen 0:f62ffd3644bf 76
MikamiUitOpen 0:f62ffd3644bf 77 } // namespace mbed