Lancaster University / mbed-src

Lancaster University's (short term!) clone of mbed-src for micro:bit. This is a copy of the github branch https://github.com/lancaster-university/mbed-classic

Fork of mbed-src by mbed official

common/FileSystemLike.cpp@10:3bc89ef62ce7, 2013-06-14 (annotated)

Committer:
emilmont
Date:
Fri Jun 14 17:49:17 2013 +0100
Revision:
10:3bc89ef62ce7
Parent:
9:0ce32e54c9a7
Child:
13:0645d8841f51
Unify mbed library sources

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 10:3bc89ef62ce7 1 /* mbed Microcontroller Library
emilmont 10:3bc89ef62ce7 2 * Copyright (c) 2006-2013 ARM Limited
emilmont 10:3bc89ef62ce7 3 *
emilmont 10:3bc89ef62ce7 4 * Licensed under the Apache License, Version 2.0 (the "License");
emilmont 10:3bc89ef62ce7 5 * you may not use this file except in compliance with the License.
emilmont 10:3bc89ef62ce7 6 * You may obtain a copy of the License at
emilmont 10:3bc89ef62ce7 7 *
emilmont 10:3bc89ef62ce7 8 * http://www.apache.org/licenses/LICENSE-2.0
emilmont 10:3bc89ef62ce7 9 *
emilmont 10:3bc89ef62ce7 10 * Unless required by applicable law or agreed to in writing, software
emilmont 10:3bc89ef62ce7 11 * distributed under the License is distributed on an "AS IS" BASIS,
emilmont 10:3bc89ef62ce7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
emilmont 10:3bc89ef62ce7 13 * See the License for the specific language governing permissions and
emilmont 10:3bc89ef62ce7 14 * limitations under the License.
emilmont 10:3bc89ef62ce7 15 */
emilmont 10:3bc89ef62ce7 16 #include "FileSystemLike.h"
emilmont 10:3bc89ef62ce7 17
emilmont 10:3bc89ef62ce7 18 namespace mbed {
emilmont 10:3bc89ef62ce7 19
emilmont 10:3bc89ef62ce7 20 class BaseDirHandle : public DirHandle {
emilmont 10:3bc89ef62ce7 21 public:
emilmont 10:3bc89ef62ce7 22 /*
emilmont 10:3bc89ef62ce7 23 We keep track of our current location as the n'th object in the
emilmont 10:3bc89ef62ce7 24 FileSystemLike list. Using a Base* instead would cause problems if that
emilmont 10:3bc89ef62ce7 25 object were to be destroyed between readdirs.
emilmont 10:3bc89ef62ce7 26 Using this method does mean though that destroying/creating objects can
emilmont 10:3bc89ef62ce7 27 give unusual results from readdir.
emilmont 10:3bc89ef62ce7 28 */
emilmont 10:3bc89ef62ce7 29 off_t n;
emilmont 10:3bc89ef62ce7 30 struct dirent cur_entry;
emilmont 10:3bc89ef62ce7 31
emilmont 10:3bc89ef62ce7 32 BaseDirHandle() {
emilmont 10:3bc89ef62ce7 33 n = 0;
emilmont 10:3bc89ef62ce7 34 }
emilmont 10:3bc89ef62ce7 35
emilmont 10:3bc89ef62ce7 36 virtual int closedir() {
emilmont 10:3bc89ef62ce7 37 delete this;
emilmont 10:3bc89ef62ce7 38 return 0;
emilmont 10:3bc89ef62ce7 39 }
emilmont 10:3bc89ef62ce7 40
emilmont 10:3bc89ef62ce7 41 virtual struct dirent *readdir() {
emilmont 10:3bc89ef62ce7 42 FileBase *ptr = FileBase::get(n);
emilmont 10:3bc89ef62ce7 43 if (ptr == NULL) return NULL;
emilmont 10:3bc89ef62ce7 44
emilmont 10:3bc89ef62ce7 45 /* Increment n, so next readdir gets the next item */
emilmont 10:3bc89ef62ce7 46 n++;
emilmont 10:3bc89ef62ce7 47
emilmont 10:3bc89ef62ce7 48 /* Setup cur entry and return a pointer to it */
emilmont 10:3bc89ef62ce7 49 std::strncpy(cur_entry.d_name, ptr->getName(), NAME_MAX);
emilmont 10:3bc89ef62ce7 50 return &cur_entry;
emilmont 10:3bc89ef62ce7 51 }
emilmont 10:3bc89ef62ce7 52
emilmont 10:3bc89ef62ce7 53 virtual off_t telldir() {
emilmont 10:3bc89ef62ce7 54 return n;
emilmont 10:3bc89ef62ce7 55 }
emilmont 10:3bc89ef62ce7 56
emilmont 10:3bc89ef62ce7 57 virtual void seekdir(off_t offset) {
emilmont 10:3bc89ef62ce7 58 n = offset;
emilmont 10:3bc89ef62ce7 59 }
emilmont 10:3bc89ef62ce7 60
emilmont 10:3bc89ef62ce7 61 virtual void rewinddir() {
emilmont 10:3bc89ef62ce7 62 n = 0;
emilmont 10:3bc89ef62ce7 63 }
emilmont 10:3bc89ef62ce7 64 };
emilmont 10:3bc89ef62ce7 65
emilmont 10:3bc89ef62ce7 66 FileSystemLike::FileSystemLike(const char *name) : FileBase(name, FileSystemPathType) {
emilmont 10:3bc89ef62ce7 67
emilmont 10:3bc89ef62ce7 68 }
emilmont 10:3bc89ef62ce7 69
emilmont 10:3bc89ef62ce7 70 FileSystemLike::~FileSystemLike() {
emilmont 10:3bc89ef62ce7 71
emilmont 10:3bc89ef62ce7 72 }
emilmont 10:3bc89ef62ce7 73
emilmont 10:3bc89ef62ce7 74 DirHandle *FileSystemLike::opendir() {
emilmont 10:3bc89ef62ce7 75 return new BaseDirHandle();
emilmont 10:3bc89ef62ce7 76 }
emilmont 10:3bc89ef62ce7 77
emilmont 10:3bc89ef62ce7 78 } // namespace mbed