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cpp/FileSystemLike.cpp@2:143cac498751, 2013-02-18 (annotated)

Committer:
emilmont
Date:
Mon Feb 18 11:44:18 2013 +0000
Revision:
2:143cac498751
Parent:
1:62685faffa05 
Update mbed sources to Rev 59

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:fd0d7bdfcdc2 1 /* mbed Microcontroller Library
emilmont 2:143cac498751 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 0:fd0d7bdfcdc2 3 *
emilmont 2:143cac498751 4 * Licensed under the Apache License, Version 2.0 (the "License");
emilmont 2:143cac498751 5 * you may not use this file except in compliance with the License.
emilmont 2:143cac498751 6 * You may obtain a copy of the License at
mbed_official 0:fd0d7bdfcdc2 7 *
emilmont 2:143cac498751 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 0:fd0d7bdfcdc2 9 *
emilmont 2:143cac498751 10 * Unless required by applicable law or agreed to in writing, software
emilmont 2:143cac498751 11 * distributed under the License is distributed on an "AS IS" BASIS,
emilmont 2:143cac498751 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
emilmont 2:143cac498751 13 * See the License for the specific language governing permissions and
emilmont 2:143cac498751 14 * limitations under the License.
mbed_official 0:fd0d7bdfcdc2 15 */
mbed_official 0:fd0d7bdfcdc2 16 #include "FileSystemLike.h"
mbed_official 0:fd0d7bdfcdc2 17
mbed_official 0:fd0d7bdfcdc2 18 namespace mbed {
mbed_official 0:fd0d7bdfcdc2 19
mbed_official 0:fd0d7bdfcdc2 20 class BaseDirHandle : public DirHandle {
mbed_official 0:fd0d7bdfcdc2 21 public:
mbed_official 0:fd0d7bdfcdc2 22 /*
mbed_official 0:fd0d7bdfcdc2 23 We keep track of our current location as the n'th object in the
mbed_official 0:fd0d7bdfcdc2 24 FileSystemLike list. Using a Base* instead would cause problems if that
mbed_official 0:fd0d7bdfcdc2 25 object were to be destroyed between readdirs.
mbed_official 0:fd0d7bdfcdc2 26 Using this method does mean though that destroying/creating objects can
mbed_official 0:fd0d7bdfcdc2 27 give unusual results from readdir.
mbed_official 0:fd0d7bdfcdc2 28 */
mbed_official 0:fd0d7bdfcdc2 29 off_t n;
mbed_official 0:fd0d7bdfcdc2 30 struct dirent cur_entry;
emilmont 2:143cac498751 31
mbed_official 0:fd0d7bdfcdc2 32 BaseDirHandle() {
mbed_official 0:fd0d7bdfcdc2 33 n = 0;
mbed_official 0:fd0d7bdfcdc2 34 }
emilmont 2:143cac498751 35
mbed_official 0:fd0d7bdfcdc2 36 virtual int closedir() {
mbed_official 0:fd0d7bdfcdc2 37 delete this;
mbed_official 0:fd0d7bdfcdc2 38 return 0;
mbed_official 0:fd0d7bdfcdc2 39 }
emilmont 2:143cac498751 40
mbed_official 0:fd0d7bdfcdc2 41 virtual struct dirent *readdir() {
emilmont 2:143cac498751 42 FileBase *ptr = FileBase::get(n);
emilmont 2:143cac498751 43 if (ptr == NULL) return NULL;
emilmont 2:143cac498751 44
mbed_official 0:fd0d7bdfcdc2 45 /* Increment n, so next readdir gets the next item */
mbed_official 0:fd0d7bdfcdc2 46 n++;
emilmont 2:143cac498751 47
emilmont 2:143cac498751 48 /* Setup cur entry and return a pointer to it */
emilmont 2:143cac498751 49 std::strncpy(cur_entry.d_name, ptr->getName(), NAME_MAX);
mbed_official 0:fd0d7bdfcdc2 50 return &cur_entry;
mbed_official 0:fd0d7bdfcdc2 51 }
emilmont 2:143cac498751 52
mbed_official 0:fd0d7bdfcdc2 53 virtual off_t telldir() {
mbed_official 0:fd0d7bdfcdc2 54 return n;
mbed_official 0:fd0d7bdfcdc2 55 }
emilmont 2:143cac498751 56
emilmont 2:143cac498751 57 virtual void seekdir(off_t offset) {
mbed_official 0:fd0d7bdfcdc2 58 n = offset;
mbed_official 0:fd0d7bdfcdc2 59 }
emilmont 2:143cac498751 60
mbed_official 0:fd0d7bdfcdc2 61 virtual void rewinddir() {
mbed_official 0:fd0d7bdfcdc2 62 n = 0;
mbed_official 0:fd0d7bdfcdc2 63 }
mbed_official 0:fd0d7bdfcdc2 64 };
mbed_official 0:fd0d7bdfcdc2 65
emilmont 2:143cac498751 66 FileSystemLike::FileSystemLike(const char *name) : FileBase(name, FileSystemPathType) {
emilmont 2:143cac498751 67
emilmont 2:143cac498751 68 }
emilmont 2:143cac498751 69
emilmont 2:143cac498751 70 FileSystemLike::~FileSystemLike() {
emilmont 2:143cac498751 71
emilmont 2:143cac498751 72 }
emilmont 2:143cac498751 73
mbed_official 0:fd0d7bdfcdc2 74 DirHandle *FileSystemLike::opendir() {
mbed_official 0:fd0d7bdfcdc2 75 return new BaseDirHandle();
mbed_official 0:fd0d7bdfcdc2 76 }
mbed_official 0:fd0d7bdfcdc2 77
mbed_official 0:fd0d7bdfcdc2 78 } // namespace mbed