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147 lines
3.3 KiB
147 lines
3.3 KiB
#include "settings.h"
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#include <SD.h>
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bool is_whitespace(char const c)
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{
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return c == ' ' || c == '\t';
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}
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bool is_printable(char const c)
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{
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//cf. ASCII table
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return c >= 0x20 && c <= 0x7E;
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}
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Settings::Settings()
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{
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}
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Settings::~Settings()
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{
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}
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void Settings::add_line(String const& section, String const& key, String const& val)
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{
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Serial.print("Section: \"");
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Serial.print(section);
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Serial.print("\", Key: \"");
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Serial.print(key);
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Serial.print("\", Val: \"");
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Serial.print(val);
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Serial.println("\"");
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}
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Settings const* Settings::load(char const* settings_filename)
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{
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Serial.println(""); //TODO: remove debug message
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if(!SD.begin(D8))
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{
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Serial.println("cannot open SD card");
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return NULL;
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}
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File file = SD.open("settings.ini", FILE_READ);
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if(!file)
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{
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Serial.println("cannot open settings file");
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return NULL;
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}
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Settings* settings = new Settings();
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Serial.println("----Settings----"); //TODO: remove debug message
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bool first_char_of_line = true;
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bool is_comment_line = false;
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bool is_section_line = false;
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unsigned int nb_whitespace = 0; //used for trimming the end of lines
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String current_section = "";
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String current_key = "";
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String current_val = "";
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bool write_to_key = true;
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while(file.available())
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{
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char const c = file.read();
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if(!is_printable(c)) continue;
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if(first_char_of_line)
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{
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//trim whitespace at beginning of line
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if(is_whitespace(c)) continue;
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first_char_of_line = false;
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//check if comment, section or normal line
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if(c == ';')
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{
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is_comment_line = true;
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continue;
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}
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else if (c == '[')
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{
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is_section_line = true;
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current_section = "";
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continue;
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}
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}
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if(c == '\n')
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{
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first_char_of_line = true;
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is_comment_line = false;
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is_section_line = false;
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settings->add_line(current_section, current_key, current_val);
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current_key = "";
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current_val = "";
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write_to_key = true;
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}
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else if(is_comment_line)
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{
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//discarding comment lines
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continue;
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}
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else if(is_section_line)
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{
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if(c == ']')
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{
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//discard end of line
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is_section_line = false;
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is_comment_line = true;
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}
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else
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{
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current_section += c;
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}
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}
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else
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{
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if(is_whitespace(c))
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++nb_whitespace;
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else if(write_to_key && c == '=')
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{
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write_to_key = false;
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}
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else
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{
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if(write_to_key)
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current_key += c;
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else
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current_val += c;
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}
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}
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}
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if(!first_char_of_line && !is_comment_line && !is_section_line)
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settings->add_line(current_section, current_key, current_val);
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file.close();
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Serial.println("----End settings----"); //TODO: remove debug log
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return settings;
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}
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