song zhao / smartball_project_test_board

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   BLE_API nRF51822

Fork of BLE_NODE_TEST by Yihui Xiong

mbed-src/common/FileSystemLike.cpp@9:05f0b5a3a70a, 2014-10-29 (annotated)

Committer:
yihui
Date:
Wed Oct 29 06:23:47 2014 +0000
Revision:
9:05f0b5a3a70a
initial

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yihui 9:05f0b5a3a70a 1 /* mbed Microcontroller Library
yihui 9:05f0b5a3a70a 2 * Copyright (c) 2006-2013 ARM Limited
yihui 9:05f0b5a3a70a 3 *
yihui 9:05f0b5a3a70a 4 * Licensed under the Apache License, Version 2.0 (the "License");
yihui 9:05f0b5a3a70a 5 * you may not use this file except in compliance with the License.
yihui 9:05f0b5a3a70a 6 * You may obtain a copy of the License at
yihui 9:05f0b5a3a70a 7 *
yihui 9:05f0b5a3a70a 8 * http://www.apache.org/licenses/LICENSE-2.0
yihui 9:05f0b5a3a70a 9 *
yihui 9:05f0b5a3a70a 10 * Unless required by applicable law or agreed to in writing, software
yihui 9:05f0b5a3a70a 11 * distributed under the License is distributed on an "AS IS" BASIS,
yihui 9:05f0b5a3a70a 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
yihui 9:05f0b5a3a70a 13 * See the License for the specific language governing permissions and
yihui 9:05f0b5a3a70a 14 * limitations under the License.
yihui 9:05f0b5a3a70a 15 */
yihui 9:05f0b5a3a70a 16 #include "FileSystemLike.h"
yihui 9:05f0b5a3a70a 17
yihui 9:05f0b5a3a70a 18 namespace mbed {
yihui 9:05f0b5a3a70a 19
yihui 9:05f0b5a3a70a 20 class BaseDirHandle : public DirHandle {
yihui 9:05f0b5a3a70a 21 public:
yihui 9:05f0b5a3a70a 22 /*
yihui 9:05f0b5a3a70a 23 We keep track of our current location as the n'th object in the
yihui 9:05f0b5a3a70a 24 FileSystemLike list. Using a Base* instead would cause problems if that
yihui 9:05f0b5a3a70a 25 object were to be destroyed between readdirs.
yihui 9:05f0b5a3a70a 26 Using this method does mean though that destroying/creating objects can
yihui 9:05f0b5a3a70a 27 give unusual results from readdir.
yihui 9:05f0b5a3a70a 28 */
yihui 9:05f0b5a3a70a 29 off_t n;
yihui 9:05f0b5a3a70a 30 struct dirent cur_entry;
yihui 9:05f0b5a3a70a 31
yihui 9:05f0b5a3a70a 32 BaseDirHandle() : n(0), cur_entry() {
yihui 9:05f0b5a3a70a 33 }
yihui 9:05f0b5a3a70a 34
yihui 9:05f0b5a3a70a 35 virtual int closedir() {
yihui 9:05f0b5a3a70a 36 delete this;
yihui 9:05f0b5a3a70a 37 return 0;
yihui 9:05f0b5a3a70a 38 }
yihui 9:05f0b5a3a70a 39
yihui 9:05f0b5a3a70a 40 virtual struct dirent *readdir() {
yihui 9:05f0b5a3a70a 41 FileBase *ptr = FileBase::get(n);
yihui 9:05f0b5a3a70a 42 if (ptr == NULL) return NULL;
yihui 9:05f0b5a3a70a 43
yihui 9:05f0b5a3a70a 44 /* Increment n, so next readdir gets the next item */
yihui 9:05f0b5a3a70a 45 n++;
yihui 9:05f0b5a3a70a 46
yihui 9:05f0b5a3a70a 47 /* Setup cur entry and return a pointer to it */
yihui 9:05f0b5a3a70a 48 std::strncpy(cur_entry.d_name, ptr->getName(), NAME_MAX);
yihui 9:05f0b5a3a70a 49 return &cur_entry;
yihui 9:05f0b5a3a70a 50 }
yihui 9:05f0b5a3a70a 51
yihui 9:05f0b5a3a70a 52 virtual off_t telldir() {
yihui 9:05f0b5a3a70a 53 return n;
yihui 9:05f0b5a3a70a 54 }
yihui 9:05f0b5a3a70a 55
yihui 9:05f0b5a3a70a 56 virtual void seekdir(off_t offset) {
yihui 9:05f0b5a3a70a 57 n = offset;
yihui 9:05f0b5a3a70a 58 }
yihui 9:05f0b5a3a70a 59
yihui 9:05f0b5a3a70a 60 virtual void rewinddir() {
yihui 9:05f0b5a3a70a 61 n = 0;
yihui 9:05f0b5a3a70a 62 }
yihui 9:05f0b5a3a70a 63 };
yihui 9:05f0b5a3a70a 64
yihui 9:05f0b5a3a70a 65 FileSystemLike::FileSystemLike(const char *name) : FileBase(name, FileSystemPathType) {
yihui 9:05f0b5a3a70a 66
yihui 9:05f0b5a3a70a 67 }
yihui 9:05f0b5a3a70a 68
yihui 9:05f0b5a3a70a 69 FileSystemLike::~FileSystemLike() {
yihui 9:05f0b5a3a70a 70
yihui 9:05f0b5a3a70a 71 }
yihui 9:05f0b5a3a70a 72
yihui 9:05f0b5a3a70a 73 DirHandle *FileSystemLike::opendir() {
yihui 9:05f0b5a3a70a 74 return new BaseDirHandle();
yihui 9:05f0b5a3a70a 75 }
yihui 9:05f0b5a3a70a 76
yihui 9:05f0b5a3a70a 77 } // namespace mbed