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mbed library sources

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common/FileSystemLike.cpp@13:0645d8841f51, 2013-08-05 (annotated)

Committer:
bogdanm
Date:
Mon Aug 05 14:12:34 2013 +0300
Revision:
13:0645d8841f51
Parent:
10:3bc89ef62ce7
Child:
212:34d62c0b2af6
Update mbed sources to revision 64

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 13:0645d8841f51 1 /* mbed Microcontroller Library
bogdanm 13:0645d8841f51 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 13:0645d8841f51 3 *
bogdanm 13:0645d8841f51 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 13:0645d8841f51 5 * you may not use this file except in compliance with the License.
bogdanm 13:0645d8841f51 6 * You may obtain a copy of the License at
bogdanm 13:0645d8841f51 7 *
bogdanm 13:0645d8841f51 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 13:0645d8841f51 9 *
bogdanm 13:0645d8841f51 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 13:0645d8841f51 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 13:0645d8841f51 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 13:0645d8841f51 13 * See the License for the specific language governing permissions and
bogdanm 13:0645d8841f51 14 * limitations under the License.
bogdanm 13:0645d8841f51 15 */
bogdanm 13:0645d8841f51 16 #include "FileSystemLike.h"
bogdanm 13:0645d8841f51 17
bogdanm 13:0645d8841f51 18 namespace mbed {
bogdanm 13:0645d8841f51 19
bogdanm 13:0645d8841f51 20 class BaseDirHandle : public DirHandle {
bogdanm 13:0645d8841f51 21 public:
bogdanm 13:0645d8841f51 22 /*
bogdanm 13:0645d8841f51 23 We keep track of our current location as the n'th object in the
bogdanm 13:0645d8841f51 24 FileSystemLike list. Using a Base* instead would cause problems if that
bogdanm 13:0645d8841f51 25 object were to be destroyed between readdirs.
bogdanm 13:0645d8841f51 26 Using this method does mean though that destroying/creating objects can
bogdanm 13:0645d8841f51 27 give unusual results from readdir.
bogdanm 13:0645d8841f51 28 */
bogdanm 13:0645d8841f51 29 off_t n;
bogdanm 13:0645d8841f51 30 struct dirent cur_entry;
bogdanm 13:0645d8841f51 31
bogdanm 13:0645d8841f51 32 BaseDirHandle() {
bogdanm 13:0645d8841f51 33 n = 0;
bogdanm 13:0645d8841f51 34 }
bogdanm 13:0645d8841f51 35
bogdanm 13:0645d8841f51 36 virtual int closedir() {
bogdanm 13:0645d8841f51 37 delete this;
bogdanm 13:0645d8841f51 38 return 0;
bogdanm 13:0645d8841f51 39 }
bogdanm 13:0645d8841f51 40
bogdanm 13:0645d8841f51 41 virtual struct dirent *readdir() {
bogdanm 13:0645d8841f51 42 FileBase *ptr = FileBase::get(n);
bogdanm 13:0645d8841f51 43 if (ptr == NULL) return NULL;
bogdanm 13:0645d8841f51 44
bogdanm 13:0645d8841f51 45 /* Increment n, so next readdir gets the next item */
bogdanm 13:0645d8841f51 46 n++;
bogdanm 13:0645d8841f51 47
bogdanm 13:0645d8841f51 48 /* Setup cur entry and return a pointer to it */
bogdanm 13:0645d8841f51 49 std::strncpy(cur_entry.d_name, ptr->getName(), NAME_MAX);
bogdanm 13:0645d8841f51 50 return &cur_entry;
bogdanm 13:0645d8841f51 51 }
bogdanm 13:0645d8841f51 52
bogdanm 13:0645d8841f51 53 virtual off_t telldir() {
bogdanm 13:0645d8841f51 54 return n;
bogdanm 13:0645d8841f51 55 }
bogdanm 13:0645d8841f51 56
bogdanm 13:0645d8841f51 57 virtual void seekdir(off_t offset) {
bogdanm 13:0645d8841f51 58 n = offset;
bogdanm 13:0645d8841f51 59 }
bogdanm 13:0645d8841f51 60
bogdanm 13:0645d8841f51 61 virtual void rewinddir() {
bogdanm 13:0645d8841f51 62 n = 0;
bogdanm 13:0645d8841f51 63 }
bogdanm 13:0645d8841f51 64 };
bogdanm 13:0645d8841f51 65
bogdanm 13:0645d8841f51 66 FileSystemLike::FileSystemLike(const char *name) : FileBase(name, FileSystemPathType) {
bogdanm 13:0645d8841f51 67
bogdanm 13:0645d8841f51 68 }
bogdanm 13:0645d8841f51 69
bogdanm 13:0645d8841f51 70 FileSystemLike::~FileSystemLike() {
bogdanm 13:0645d8841f51 71
bogdanm 13:0645d8841f51 72 }
bogdanm 13:0645d8841f51 73
bogdanm 13:0645d8841f51 74 DirHandle *FileSystemLike::opendir() {
bogdanm 13:0645d8841f51 75 return new BaseDirHandle();
bogdanm 13:0645d8841f51 76 }
bogdanm 13:0645d8841f51 77
bogdanm 13:0645d8841f51 78 } // namespace mbed