Tomo Yamanaka / mbed-dev

mbed library sources. Supersedes mbed-src. GR-PEACH runs on RAM.

Fork of mbed-dev by mbed official

common/FileSystemLike.cpp@103:493a29d2d4d7, 2016-03-30 (annotated)

Committer:
1050186
Date:
Wed Mar 30 11:41:25 2016 +0000
Revision:
103:493a29d2d4d7
Parent:
0:9b334a45a8ff 
GR-PEACH runs on RAM.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 0:9b334a45a8ff 3 *
bogdanm 0:9b334a45a8ff 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 0:9b334a45a8ff 5 * you may not use this file except in compliance with the License.
bogdanm 0:9b334a45a8ff 6 * You may obtain a copy of the License at
bogdanm 0:9b334a45a8ff 7 *
bogdanm 0:9b334a45a8ff 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 0:9b334a45a8ff 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 0:9b334a45a8ff 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 0:9b334a45a8ff 13 * See the License for the specific language governing permissions and
bogdanm 0:9b334a45a8ff 14 * limitations under the License.
bogdanm 0:9b334a45a8ff 15 */
bogdanm 0:9b334a45a8ff 16 #include "FileSystemLike.h"
bogdanm 0:9b334a45a8ff 17
bogdanm 0:9b334a45a8ff 18 namespace mbed {
bogdanm 0:9b334a45a8ff 19
bogdanm 0:9b334a45a8ff 20 class BaseDirHandle : public DirHandle {
bogdanm 0:9b334a45a8ff 21 public:
bogdanm 0:9b334a45a8ff 22 /*
bogdanm 0:9b334a45a8ff 23 We keep track of our current location as the n'th object in the
bogdanm 0:9b334a45a8ff 24 FileSystemLike list. Using a Base* instead would cause problems if that
bogdanm 0:9b334a45a8ff 25 object were to be destroyed between readdirs.
bogdanm 0:9b334a45a8ff 26 Using this method does mean though that destroying/creating objects can
bogdanm 0:9b334a45a8ff 27 give unusual results from readdir.
bogdanm 0:9b334a45a8ff 28 */
bogdanm 0:9b334a45a8ff 29 off_t n;
bogdanm 0:9b334a45a8ff 30 struct dirent cur_entry;
bogdanm 0:9b334a45a8ff 31
bogdanm 0:9b334a45a8ff 32 BaseDirHandle() : n(0), cur_entry() {
bogdanm 0:9b334a45a8ff 33 }
bogdanm 0:9b334a45a8ff 34
bogdanm 0:9b334a45a8ff 35 virtual int closedir() {
bogdanm 0:9b334a45a8ff 36 delete this;
bogdanm 0:9b334a45a8ff 37 return 0;
bogdanm 0:9b334a45a8ff 38 }
bogdanm 0:9b334a45a8ff 39
bogdanm 0:9b334a45a8ff 40 virtual struct dirent *readdir() {
bogdanm 0:9b334a45a8ff 41 FileBase *ptr = FileBase::get(n);
bogdanm 0:9b334a45a8ff 42 if (ptr == NULL) return NULL;
bogdanm 0:9b334a45a8ff 43
bogdanm 0:9b334a45a8ff 44 /* Increment n, so next readdir gets the next item */
bogdanm 0:9b334a45a8ff 45 n++;
bogdanm 0:9b334a45a8ff 46
bogdanm 0:9b334a45a8ff 47 /* Setup cur entry and return a pointer to it */
bogdanm 0:9b334a45a8ff 48 std::strncpy(cur_entry.d_name, ptr->getName(), NAME_MAX);
bogdanm 0:9b334a45a8ff 49 return &cur_entry;
bogdanm 0:9b334a45a8ff 50 }
bogdanm 0:9b334a45a8ff 51
bogdanm 0:9b334a45a8ff 52 virtual off_t telldir() {
bogdanm 0:9b334a45a8ff 53 return n;
bogdanm 0:9b334a45a8ff 54 }
bogdanm 0:9b334a45a8ff 55
bogdanm 0:9b334a45a8ff 56 virtual void seekdir(off_t offset) {
bogdanm 0:9b334a45a8ff 57 n = offset;
bogdanm 0:9b334a45a8ff 58 }
bogdanm 0:9b334a45a8ff 59
bogdanm 0:9b334a45a8ff 60 virtual void rewinddir() {
bogdanm 0:9b334a45a8ff 61 n = 0;
bogdanm 0:9b334a45a8ff 62 }
bogdanm 0:9b334a45a8ff 63 };
bogdanm 0:9b334a45a8ff 64
bogdanm 0:9b334a45a8ff 65 FileSystemLike::FileSystemLike(const char *name) : FileBase(name, FileSystemPathType) {
bogdanm 0:9b334a45a8ff 66
bogdanm 0:9b334a45a8ff 67 }
bogdanm 0:9b334a45a8ff 68
bogdanm 0:9b334a45a8ff 69 FileSystemLike::~FileSystemLike() {
bogdanm 0:9b334a45a8ff 70
bogdanm 0:9b334a45a8ff 71 }
bogdanm 0:9b334a45a8ff 72
bogdanm 0:9b334a45a8ff 73 DirHandle *FileSystemLike::opendir() {
bogdanm 0:9b334a45a8ff 74 return new BaseDirHandle();
bogdanm 0:9b334a45a8ff 75 }
bogdanm 0:9b334a45a8ff 76
bogdanm 0:9b334a45a8ff 77 } // namespace mbed