tmk_core/tool/mbed/mbed-sdk/libraries/mbed/common/FilePath.cpp

   1 /* mbed Microcontroller Library
   2  * Copyright (c) 2006-2013 ARM Limited
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 #include "FilePath.h"
  17
  18 namespace mbed {
  19
  20 FilePath::FilePath(const char* file_path) : file_name(NULL), fb(NULL) {
  21     if ((file_path[0] != '/') || (file_path[1] == 0)) return;
  22
  23     const char* file_system = &file_path[1];
  24     file_name = file_system;
  25     int len = 0;
  26     while (true) {
  27         char c = *file_name;
  28         if (c == '/') { // end of object name
  29             file_name++; // point to one char after the '/'
  30             break;
  31         }
  32         if (c == 0) { // end of object name, with no filename
  33             break;
  34         }
  35         len++;
  36         file_name++;
  37     }
  38
  39     fb = FileBase::lookup(file_system, len);
  40 }
  41
  42 const char* FilePath::fileName(void) {
  43     return file_name;
  44 }
  45
  46 bool FilePath::isFileSystem(void) {
  47     if (NULL == fb)
  48         return false;
  49     return (fb->getPathType() == FileSystemPathType);
  50 }
  51
  52 FileSystemLike* FilePath::fileSystem(void) {
  53     if (isFileSystem()) {
  54         return (FileSystemLike*)fb;
  55     }
  56     return NULL;
  57 }
  58
  59 bool FilePath::isFile(void) {
  60     if (NULL == fb)
  61         return false;
  62     return (fb->getPathType() == FilePathType);
  63 }
  64
  65 FileLike* FilePath::file(void) {
  66     if (isFile()) {
  67         return (FileLike*)fb;
  68     }
  69     return NULL;
  70 }
  71
  72 bool FilePath::exists(void) {
  73     return fb != NULL;
  74 }
  75
  76 } // namespace mbed