Tamura Mizuki / STM32F746_FFT

fft

Dependencies:   BSP_DISCO_F746NG SDFileSystem_Warning_Fixed

mbed_src_STM32F7/common/FileSystemLike.cpp@3:6f7e05dd8d15, 2020-03-06 (annotated)

Committer:
aria19970520
Date:
Fri Mar 06 06:52:14 2020 +0000
Revision:
3:6f7e05dd8d15
Parent:
0:3e46577dc273 
fft

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:3e46577dc273 1 /* mbed Microcontroller Library
MikamiUitOpen 0:3e46577dc273 2 * Copyright (c) 2006-2013 ARM Limited
MikamiUitOpen 0:3e46577dc273 3 *
MikamiUitOpen 0:3e46577dc273 4 * Licensed under the Apache License, Version 2.0 (the "License");
MikamiUitOpen 0:3e46577dc273 5 * you may not use this file except in compliance with the License.
MikamiUitOpen 0:3e46577dc273 6 * You may obtain a copy of the License at
MikamiUitOpen 0:3e46577dc273 7 *
MikamiUitOpen 0:3e46577dc273 8 * http://www.apache.org/licenses/LICENSE-2.0
MikamiUitOpen 0:3e46577dc273 9 *
MikamiUitOpen 0:3e46577dc273 10 * Unless required by applicable law or agreed to in writing, software
MikamiUitOpen 0:3e46577dc273 11 * distributed under the License is distributed on an "AS IS" BASIS,
MikamiUitOpen 0:3e46577dc273 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MikamiUitOpen 0:3e46577dc273 13 * See the License for the specific language governing permissions and
MikamiUitOpen 0:3e46577dc273 14 * limitations under the License.
MikamiUitOpen 0:3e46577dc273 15 */
MikamiUitOpen 0:3e46577dc273 16 #include "FileSystemLike.h"
MikamiUitOpen 0:3e46577dc273 17
MikamiUitOpen 0:3e46577dc273 18 namespace mbed {
MikamiUitOpen 0:3e46577dc273 19
MikamiUitOpen 0:3e46577dc273 20 class BaseDirHandle : public DirHandle {
MikamiUitOpen 0:3e46577dc273 21 public:
MikamiUitOpen 0:3e46577dc273 22 /*
MikamiUitOpen 0:3e46577dc273 23 We keep track of our current location as the n'th object in the
MikamiUitOpen 0:3e46577dc273 24 FileSystemLike list. Using a Base* instead would cause problems if that
MikamiUitOpen 0:3e46577dc273 25 object were to be destroyed between readdirs.
MikamiUitOpen 0:3e46577dc273 26 Using this method does mean though that destroying/creating objects can
MikamiUitOpen 0:3e46577dc273 27 give unusual results from readdir.
MikamiUitOpen 0:3e46577dc273 28 */
MikamiUitOpen 0:3e46577dc273 29 off_t n;
MikamiUitOpen 0:3e46577dc273 30 struct dirent cur_entry;
MikamiUitOpen 0:3e46577dc273 31
MikamiUitOpen 0:3e46577dc273 32 BaseDirHandle() : n(0), cur_entry() {
MikamiUitOpen 0:3e46577dc273 33 }
MikamiUitOpen 0:3e46577dc273 34
MikamiUitOpen 0:3e46577dc273 35 virtual int closedir() {
MikamiUitOpen 0:3e46577dc273 36 delete this;
MikamiUitOpen 0:3e46577dc273 37 return 0;
MikamiUitOpen 0:3e46577dc273 38 }
MikamiUitOpen 0:3e46577dc273 39
MikamiUitOpen 0:3e46577dc273 40 virtual struct dirent *readdir() {
MikamiUitOpen 0:3e46577dc273 41 FileBase *ptr = FileBase::get(n);
MikamiUitOpen 0:3e46577dc273 42 if (ptr == NULL) return NULL;
MikamiUitOpen 0:3e46577dc273 43
MikamiUitOpen 0:3e46577dc273 44 /* Increment n, so next readdir gets the next item */
MikamiUitOpen 0:3e46577dc273 45 n++;
MikamiUitOpen 0:3e46577dc273 46
MikamiUitOpen 0:3e46577dc273 47 /* Setup cur entry and return a pointer to it */
MikamiUitOpen 0:3e46577dc273 48 std::strncpy(cur_entry.d_name, ptr->getName(), NAME_MAX);
MikamiUitOpen 0:3e46577dc273 49 return &cur_entry;
MikamiUitOpen 0:3e46577dc273 50 }
MikamiUitOpen 0:3e46577dc273 51
MikamiUitOpen 0:3e46577dc273 52 virtual off_t telldir() {
MikamiUitOpen 0:3e46577dc273 53 return n;
MikamiUitOpen 0:3e46577dc273 54 }
MikamiUitOpen 0:3e46577dc273 55
MikamiUitOpen 0:3e46577dc273 56 virtual void seekdir(off_t offset) {
MikamiUitOpen 0:3e46577dc273 57 n = offset;
MikamiUitOpen 0:3e46577dc273 58 }
MikamiUitOpen 0:3e46577dc273 59
MikamiUitOpen 0:3e46577dc273 60 virtual void rewinddir() {
MikamiUitOpen 0:3e46577dc273 61 n = 0;
MikamiUitOpen 0:3e46577dc273 62 }
MikamiUitOpen 0:3e46577dc273 63 };
MikamiUitOpen 0:3e46577dc273 64
MikamiUitOpen 0:3e46577dc273 65 FileSystemLike::FileSystemLike(const char *name) : FileBase(name, FileSystemPathType) {
MikamiUitOpen 0:3e46577dc273 66
MikamiUitOpen 0:3e46577dc273 67 }
MikamiUitOpen 0:3e46577dc273 68
MikamiUitOpen 0:3e46577dc273 69 FileSystemLike::~FileSystemLike() {
MikamiUitOpen 0:3e46577dc273 70
MikamiUitOpen 0:3e46577dc273 71 }
MikamiUitOpen 0:3e46577dc273 72
MikamiUitOpen 0:3e46577dc273 73 DirHandle *FileSystemLike::opendir() {
MikamiUitOpen 0:3e46577dc273 74 return new BaseDirHandle();
MikamiUitOpen 0:3e46577dc273 75 }
MikamiUitOpen 0:3e46577dc273 76
MikamiUitOpen 0:3e46577dc273 77 } // namespace mbed