Diff: Preferences.cpp

Revision:

112:1fb53d4729af

Child:

114:bd38ad417d6a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Preferences.cpp	Tue Mar 18 21:46:48 2014 +0000
@@ -0,0 +1,100 @@
+/* Copyright C2013 Doug Anson, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files the "Software", to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+ 
+ #include "mbed.h"
+ #include "Preferences.h"
+ 
+ // default constructor
+ Preferences::Preferences(ErrorHandler *error_handler) {
+     this->m_error_handler = error_handler;
+     this->m_local_filesystem = new LocalFileSystem("local");
+     this->m_config_file = new ConfigFile();
+     this->initialize();
+ }
+ 
+ // destructor
+ Preferences::~Preferences() {
+     if (this->m_config_file != NULL) delete this->m_config_file;
+     if (this->m_local_filesystem != NULL) delete this->m_local_filesystem;
+ }
+ 
+ // initialize the preferences from the preferences file
+ bool Preferences::initialize() {
+     bool success = true;
+     
+     // read from the config file
+     if (this->m_config_file != NULL) {
+         if (!this->m_config_file->read(PREFERENCES_FILE)) {
+            this->logger()->log("Unable to initialize preferences: %s",PREFERENCES_FILE);
+            success = false;
+         }
+         else {
+             // success!
+             this->logger()->log("Preference File: %s read successfully",PREFERENCES_FILE);
+             success = true;
+         }
+     }
+     else {
+         // no config file object
+         this->logger()->log("Unable to initialize preferences: %s. No instance.",PREFERENCES_FILE);
+         success = false;
+     }
+     
+     // return our status
+     return success;
+ }
+ 
+ // integer preference with defaults
+ int Preferences::getIntPreference(char *name,int def_value) {\
+     int int_value = def_value;
+     char buffer[PREFERENCE_VALUE_LEN+1];
+     memset(buffer,0,PREFERENCE_VALUE_LEN+1);
+     char *value = this->getPreference(name,buffer,PREFERENCE_VALUE_LEN,NULL);
+     if (value != NULL) sscanf(buffer,"%d",&int_value);
+     return int_value;
+ }
+  
+ // boolean preference with defaults
+ bool Preferences::getBooleanPreference(char *name,bool def_value) {
+     bool bool_value = def_value;
+     char buffer[PREFERENCE_VALUE_LEN+1];
+     memset(buffer,0,PREFERENCE_VALUE_LEN+1);
+     char *value = this->getPreference(name,buffer,PREFERENCE_VALUE_LEN,NULL);
+     if (value != NULL && strcmp(value,"true") == 0) bool_value = true;
+     if (value != NULL && strcmp(value,"false") == 0) bool_value = false;
+     return bool_value;
+ }
+ 
+ // string preference with defaults
+ char *Preferences::getPreference(char *name,char *buffer,int buffer_length,char *def_value) {
+     char *value = def_value;
+     if (this->m_config_file->getValue(name, &buffer[0], buffer_length)) value = buffer;
+     return value;
+ }
+ 
+ // get our error handler
+ ErrorHandler *Preferences::logger() { return this->m_error_handler; }
+ 
+ // get our preference count
+ int Preferences::numPreferences() { return this->m_config_file->getCount(); }
+ 
+ // min function
+ int Preferences::min(int value1,int value2) {
+    if (value1 < value2) return value1;
+    return value2;
+ }
\ No newline at end of file