implemented FileConfigSource::read() by copying the old version with a few changes

diff --git a/src/libs/ConfigSources/FileConfigSource.cpp b/src/libs/ConfigSources/FileConfigSource.cpp
index 450594e..f089771 100644 (file)
--- a/src/libs/ConfigSources/FileConfigSource.cpp
+++ b/src/libs/ConfigSources/FileConfigSource.cpp
@@ -105,7 +105,42 @@ void FileConfigSource::write( string setting, string value ){
     //this->kernel->serial->printf("ERROR: configuration key not found\r\n");
 }
 
-string FileConfigSource::read( vector<uint16_t> check_sums ){}
+// Return the value for a specific checksum
+string FileConfigSource::read( vector<uint16_t> check_sums ){
+
+    string value = "";
+
+    if( this->has_config_file() == false ){return value;}
+    // Open the config file ( find it if we haven't already found it ) 
+    FILE *lp = fopen(this->get_config_file().c_str(), "r");
+    string buffer;
+    int c; 
+    // For each line 
+    do {
+        c = fgetc (lp);
+        if (c == '\n' || c == EOF){
+            // We have a new line
+            if( buffer[0] == '#' ){ buffer.clear(); continue; } // Ignore comments
+            if( buffer.length() < 3 ){ buffer.clear(); continue; } //Ignore empty lines
+            size_t begin_key = buffer.find_first_not_of(" ");
+            size_t begin_value = buffer.find_first_not_of(" ", buffer.find_first_of(" ", begin_key));
+            string key = buffer.substr(begin_key,  buffer.find_first_of(" ", begin_key) - begin_key).append(" ");
+            vector<uint16_t> line_checksums = get_checksums(key);
+
+            if(check_sums == line_checksums){
+                value = buffer.substr(begin_value, buffer.find_first_of("\r\n# ", begin_value+1)-begin_value);
+                break;
+            }
+            
+            buffer.clear();
+        }else{
+            buffer += c;
+        }
+    } while (c != EOF);  
+    fclose(lp);
+
+    return value;
+}
 
 // Return wether or not we have a readable config file
 bool FileConfigSource::has_config_file(){