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mbed library sources

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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

cpp/FileSystemLike.cpp@1:62685faffa05, 2012-11-29 (annotated)

Committer:
emilmont
Date:
Thu Nov 29 15:41:14 2012 +0000
Revision:
1:62685faffa05
Parent:
0:fd0d7bdfcdc2
Child:
2:143cac498751
Update sources to [Rev 49]

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:fd0d7bdfcdc2 1 /* mbed Microcontroller Library
mbed_official 0:fd0d7bdfcdc2 2 * Copyright (c) 2006-2012 ARM Limited
mbed_official 0:fd0d7bdfcdc2 3 *
mbed_official 0:fd0d7bdfcdc2 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
mbed_official 0:fd0d7bdfcdc2 5 * of this software and associated documentation files (the "Software"), to deal
mbed_official 0:fd0d7bdfcdc2 6 * in the Software without restriction, including without limitation the rights
mbed_official 0:fd0d7bdfcdc2 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
mbed_official 0:fd0d7bdfcdc2 8 * copies of the Software, and to permit persons to whom the Software is
mbed_official 0:fd0d7bdfcdc2 9 * furnished to do so, subject to the following conditions:
mbed_official 0:fd0d7bdfcdc2 10 *
mbed_official 0:fd0d7bdfcdc2 11 * The above copyright notice and this permission notice shall be included in
mbed_official 0:fd0d7bdfcdc2 12 * all copies or substantial portions of the Software.
mbed_official 0:fd0d7bdfcdc2 13 *
mbed_official 0:fd0d7bdfcdc2 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
mbed_official 0:fd0d7bdfcdc2 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
mbed_official 0:fd0d7bdfcdc2 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
mbed_official 0:fd0d7bdfcdc2 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
mbed_official 0:fd0d7bdfcdc2 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
mbed_official 0:fd0d7bdfcdc2 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
mbed_official 0:fd0d7bdfcdc2 20 * SOFTWARE.
mbed_official 0:fd0d7bdfcdc2 21 */
mbed_official 0:fd0d7bdfcdc2 22 #include "FileSystemLike.h"
mbed_official 0:fd0d7bdfcdc2 23
mbed_official 0:fd0d7bdfcdc2 24 namespace mbed {
mbed_official 0:fd0d7bdfcdc2 25
mbed_official 0:fd0d7bdfcdc2 26 FileSystemLike::FileSystemLike(const char *name) {
mbed_official 0:fd0d7bdfcdc2 27 _name = name;
mbed_official 0:fd0d7bdfcdc2 28
mbed_official 0:fd0d7bdfcdc2 29 if (name != NULL) {
mbed_official 0:fd0d7bdfcdc2 30 // put this object at head of the list
mbed_official 0:fd0d7bdfcdc2 31 _next = _head;
mbed_official 0:fd0d7bdfcdc2 32 _head = this;
mbed_official 0:fd0d7bdfcdc2 33 } else {
mbed_official 0:fd0d7bdfcdc2 34 _next = NULL;
mbed_official 0:fd0d7bdfcdc2 35 }
mbed_official 0:fd0d7bdfcdc2 36 }
mbed_official 0:fd0d7bdfcdc2 37
mbed_official 0:fd0d7bdfcdc2 38 FileSystemLike::~FileSystemLike() {
mbed_official 0:fd0d7bdfcdc2 39 if (_name != NULL) {
mbed_official 0:fd0d7bdfcdc2 40 // remove this object from the list
mbed_official 0:fd0d7bdfcdc2 41 if (_head == this) { // first in the list, so just drop me
mbed_official 0:fd0d7bdfcdc2 42 _head = _next;
mbed_official 0:fd0d7bdfcdc2 43 } else { // find the object before me, then drop me
mbed_official 0:fd0d7bdfcdc2 44 FileSystemLike* p = _head;
mbed_official 0:fd0d7bdfcdc2 45 while (p->_next != this) {
mbed_official 0:fd0d7bdfcdc2 46 p = p->_next;
mbed_official 0:fd0d7bdfcdc2 47 }
mbed_official 0:fd0d7bdfcdc2 48 p->_next = _next;
mbed_official 0:fd0d7bdfcdc2 49 }
mbed_official 0:fd0d7bdfcdc2 50 }
mbed_official 0:fd0d7bdfcdc2 51 }
mbed_official 0:fd0d7bdfcdc2 52
mbed_official 0:fd0d7bdfcdc2 53 FileSystemLike *FileSystemLike::lookup(const char *name, unsigned int len) {
mbed_official 0:fd0d7bdfcdc2 54 FileSystemLike *p = _head;
mbed_official 0:fd0d7bdfcdc2 55 while (p != NULL) {
mbed_official 0:fd0d7bdfcdc2 56 /* Check that p->_name matches name and is the correct length */
mbed_official 0:fd0d7bdfcdc2 57 if (p->_name != NULL && std::strncmp(p->_name, name, len) == 0 && std::strlen(p->_name) == len) {
mbed_official 0:fd0d7bdfcdc2 58 return p;
mbed_official 0:fd0d7bdfcdc2 59 }
mbed_official 0:fd0d7bdfcdc2 60 p = p->_next;
mbed_official 0:fd0d7bdfcdc2 61 }
mbed_official 0:fd0d7bdfcdc2 62 return NULL;
mbed_official 0:fd0d7bdfcdc2 63 }
mbed_official 0:fd0d7bdfcdc2 64
mbed_official 0:fd0d7bdfcdc2 65 class BaseDirHandle : public DirHandle {
mbed_official 0:fd0d7bdfcdc2 66 public:
mbed_official 0:fd0d7bdfcdc2 67 /*
mbed_official 0:fd0d7bdfcdc2 68 We keep track of our current location as the n'th object in the
mbed_official 0:fd0d7bdfcdc2 69 FileSystemLike list. Using a Base* instead would cause problems if that
mbed_official 0:fd0d7bdfcdc2 70 object were to be destroyed between readdirs.
mbed_official 0:fd0d7bdfcdc2 71 Using this method does mean though that destroying/creating objects can
mbed_official 0:fd0d7bdfcdc2 72 give unusual results from readdir.
mbed_official 0:fd0d7bdfcdc2 73 */
mbed_official 0:fd0d7bdfcdc2 74 off_t n;
mbed_official 0:fd0d7bdfcdc2 75 struct dirent cur_entry;
mbed_official 0:fd0d7bdfcdc2 76
mbed_official 0:fd0d7bdfcdc2 77 BaseDirHandle() {
mbed_official 0:fd0d7bdfcdc2 78 n = 0;
mbed_official 0:fd0d7bdfcdc2 79 }
mbed_official 0:fd0d7bdfcdc2 80
mbed_official 0:fd0d7bdfcdc2 81 virtual int closedir() {
mbed_official 0:fd0d7bdfcdc2 82 delete this;
mbed_official 0:fd0d7bdfcdc2 83 return 0;
mbed_official 0:fd0d7bdfcdc2 84 }
mbed_official 0:fd0d7bdfcdc2 85
mbed_official 0:fd0d7bdfcdc2 86 virtual struct dirent *readdir() {
mbed_official 0:fd0d7bdfcdc2 87 FileSystemLike *ptr = FileSystemLike::_head;
mbed_official 0:fd0d7bdfcdc2 88 /* Find the n'th FileLike or FileSystemLike object in the Base list */
mbed_official 0:fd0d7bdfcdc2 89 int m = 0;
mbed_official 0:fd0d7bdfcdc2 90 while (1) {
mbed_official 0:fd0d7bdfcdc2 91 if (ptr == NULL) {
mbed_official 0:fd0d7bdfcdc2 92 /* No such object */
mbed_official 0:fd0d7bdfcdc2 93 return NULL;
mbed_official 0:fd0d7bdfcdc2 94 }
mbed_official 0:fd0d7bdfcdc2 95 if (m == n) break;
mbed_official 0:fd0d7bdfcdc2 96
mbed_official 0:fd0d7bdfcdc2 97 m++;
mbed_official 0:fd0d7bdfcdc2 98 ptr = ptr->_next;
mbed_official 0:fd0d7bdfcdc2 99 }
mbed_official 0:fd0d7bdfcdc2 100 /* Increment n, so next readdir gets the next item */
mbed_official 0:fd0d7bdfcdc2 101 n++;
mbed_official 0:fd0d7bdfcdc2 102 /* Setup curentry and return a pointer to it */
mbed_official 0:fd0d7bdfcdc2 103 std::strncpy(cur_entry.d_name, ptr->_name, NAME_MAX);
mbed_official 0:fd0d7bdfcdc2 104 return &cur_entry;
mbed_official 0:fd0d7bdfcdc2 105 }
mbed_official 0:fd0d7bdfcdc2 106
mbed_official 0:fd0d7bdfcdc2 107 virtual off_t telldir() {
mbed_official 0:fd0d7bdfcdc2 108 return n;
mbed_official 0:fd0d7bdfcdc2 109 }
mbed_official 0:fd0d7bdfcdc2 110
mbed_official 0:fd0d7bdfcdc2 111 virtual void seekdir(off_t offset) {
mbed_official 0:fd0d7bdfcdc2 112 n = offset;
mbed_official 0:fd0d7bdfcdc2 113 }
mbed_official 0:fd0d7bdfcdc2 114
mbed_official 0:fd0d7bdfcdc2 115 virtual void rewinddir() {
mbed_official 0:fd0d7bdfcdc2 116 n = 0;
mbed_official 0:fd0d7bdfcdc2 117 }
mbed_official 0:fd0d7bdfcdc2 118 };
mbed_official 0:fd0d7bdfcdc2 119
mbed_official 0:fd0d7bdfcdc2 120 DirHandle *FileSystemLike::opendir() {
mbed_official 0:fd0d7bdfcdc2 121 return new BaseDirHandle();
mbed_official 0:fd0d7bdfcdc2 122 }
mbed_official 0:fd0d7bdfcdc2 123
mbed_official 0:fd0d7bdfcdc2 124 FileSystemLike *FileSystemLike::_head = NULL;
mbed_official 0:fd0d7bdfcdc2 125
mbed_official 0:fd0d7bdfcdc2 126
mbed_official 0:fd0d7bdfcdc2 127 FilePath::FilePath(const char* file_path) : file_name(NULL), fs(NULL) {
mbed_official 0:fd0d7bdfcdc2 128 if ((file_path[0] != '/') || (file_path[1] == 0)) return;
mbed_official 0:fd0d7bdfcdc2 129
mbed_official 0:fd0d7bdfcdc2 130 const char* file_system = &file_path[1];
mbed_official 0:fd0d7bdfcdc2 131 file_name = file_system;
mbed_official 0:fd0d7bdfcdc2 132 int len = 0;
mbed_official 0:fd0d7bdfcdc2 133 while (true) {
emilmont 1:62685faffa05 134 char c = *file_name;
mbed_official 0:fd0d7bdfcdc2 135 if (c == '/') { // end of object name
emilmont 1:62685faffa05 136 file_name++; // point to one char after the '/'
mbed_official 0:fd0d7bdfcdc2 137 break;
mbed_official 0:fd0d7bdfcdc2 138 }
mbed_official 0:fd0d7bdfcdc2 139 if (c == 0) { // end of object name, with no filename
mbed_official 0:fd0d7bdfcdc2 140 break;
mbed_official 0:fd0d7bdfcdc2 141 }
mbed_official 0:fd0d7bdfcdc2 142 len++;
emilmont 1:62685faffa05 143 file_name++;
mbed_official 0:fd0d7bdfcdc2 144 }
mbed_official 0:fd0d7bdfcdc2 145
mbed_official 0:fd0d7bdfcdc2 146 fs = FileSystemLike::lookup(file_system, len);
mbed_official 0:fd0d7bdfcdc2 147 }
mbed_official 0:fd0d7bdfcdc2 148
mbed_official 0:fd0d7bdfcdc2 149 const char* FilePath::fileName(void) {
mbed_official 0:fd0d7bdfcdc2 150 return file_name;
mbed_official 0:fd0d7bdfcdc2 151 }
mbed_official 0:fd0d7bdfcdc2 152
mbed_official 0:fd0d7bdfcdc2 153 FileSystemLike* FilePath::fileSystem(void) {
mbed_official 0:fd0d7bdfcdc2 154 return fs;
mbed_official 0:fd0d7bdfcdc2 155 }
mbed_official 0:fd0d7bdfcdc2 156
mbed_official 0:fd0d7bdfcdc2 157 } // namespace mbed