Fork of Smoothie to port to mbed non-LPC targets.
Fork of Smoothie by
libs/ConfigSources/FileConfigSource.cpp
- Committer:
- Michael J. Spencer
- Date:
- 2014-02-28
- Revision:
- 2:1df0b61d3b5a
- Parent:
- 0:31e91bb0ef3c
- Child:
- 3:f151d08d335c
File content as of revision 2:1df0b61d3b5a:
/* This file is part of Smoothie (http://smoothieware.org/). The motion control part is heavily based on Grbl (https://github.com/simen/grbl). Smoothie is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Smoothie is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Smoothie. If not, see <http://www.gnu.org/licenses/>. */ #include "libs/Kernel.h" #include "ConfigValue.h" #include "FileConfigSource.h" #include "ConfigCache.h" #include <malloc.h> using namespace std; #include <string> FileConfigSource::FileConfigSource(string config_file, uint16_t name_checksum){ this->name_checksum = name_checksum; this->config_file = config_file; this->config_file_found = false; } // Transfer all values found in the file to the passed cache void FileConfigSource::transfer_values_to_cache( ConfigCache* cache ){ if( this->has_config_file() == false ){return;} // Open the config file ( find it if we haven't already found it ) FILE *lp = fopen(this->get_config_file().c_str(), "r"); int c; // For each line do { process_char_from_ascii_config(c = fgetc(lp), cache); } while (c != EOF); fclose(lp); } // Return true if the check_sums match bool FileConfigSource::is_named( uint16_t check_sum ){ return check_sum == this->name_checksum; } // Write a config setting to the file void FileConfigSource::write( string setting, string 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(" \t"); size_t begin_value = buffer.find_first_not_of(" \t", buffer.find_first_of(" \t", begin_key)); // If this line matches the checksum string candidate = buffer.substr(begin_key, buffer.find_first_of(" \t", begin_key) - begin_key); if( candidate.compare(setting) != 0 ){ buffer.clear(); continue; } int free_space = int(int(buffer.find_first_of("\r\n#", begin_value+1))-begin_value); if( int(value.length()) >= free_space ){ //THEKERNEL->streams->printf("ERROR: Not enough room for value\r\n"); fclose(lp); return; } // Update value for( int i = value.length(); i < free_space; i++){ value += " "; } fpos_t pos; fgetpos( lp, &pos ); int start = pos - buffer.length() + begin_value - 1; fseek(lp, start, SEEK_SET); fputs(value.c_str(), lp); fclose(lp); return; }else{ buffer += c; } } while (c != EOF); fclose(lp); //THEKERNEL->streams->printf("ERROR: configuration key not found\r\n"); } // Return the value for a specific checksum string FileConfigSource::read( uint16_t check_sums[3] ){ 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"); int c; // For each line do { c = fgetc (lp); process_char_from_ascii_config(c, check_sums); } while (c != EOF); fclose(lp); return value; } // Return wether or not we have a readable config file bool FileConfigSource::has_config_file(){ if( this->config_file_found ){ return true; } this->try_config_file(this->config_file); if( this->config_file_found ){ return true; }else{ return false; } } // Tool function for get_config_file inline void FileConfigSource::try_config_file(string candidate){ if(file_exists(candidate)){ this->config_file_found = true; } } // Get the filename for the config file string FileConfigSource::get_config_file(){ if( this->config_file_found ){ return this->config_file; } if( this->has_config_file() ){ return this->config_file; }else{ printf("ERROR: no config file found\r\n"); return ""; } }