File content as of revision 54:d46459104dea:

#include "SavedGames.h"

const int arrow_up[3][5] = {
    { 0, 0, 1, 0, 0 },
    { 0, 1, 1, 1, 0 },
    { 1, 1, 1, 1, 1 },
};

const int arrow_down[3][5] = {
    { 1, 1, 1, 1, 1 },
    { 0, 1, 1, 1, 0 },
    { 0, 0, 1, 0, 0 },
};

SavedGames::SavedGames() {
    
}

SavedGames::~SavedGames() {
    
}

void SavedGames::init(SDFileSystem &sd,N5110 &lcd){
    error_ = false;
    check_sd_present(sd,lcd);
    read_saved_data(sd,lcd); 
    display_data_number_ = 0;
}

void SavedGames::check_sd_present(SDFileSystem &sd,N5110 &lcd){
    if(!sd.card_present()) {
        error_ = true;
        
        //print error screen
        lcd.clear();
        lcd.printString("SD card not ",9,3);
        lcd.printString("  present   ",9,4);
        lcd.refresh();
        wait(3);
    }
}

void SavedGames::error_open_file(N5110 &lcd){
    error_ = true;
        
    //print error screen
    lcd.clear();
    lcd.printString(" Unable to  ",9,3);
    lcd.printString(" open file  ",9,4);
    lcd.refresh();
    wait(3); 
}

void SavedGames::add_saved_data(SDFileSystem &sd, SavedGamesData data,
N5110 &lcd){
    //opens file  
    FILE *fp = fopen("/sd/SavedGames.txt", "a");
    
    if (fp == NULL) {
        error_open_file(lcd);
        return;
    }else{
         //Adda data to file if no error
        fprintf(fp, "%d\n", data.score); 
        fprintf(fp, "%d\n", data.lives); 
        fprintf(fp, "%d\n", data.smart_bombs); 
        fprintf(fp, "%d\n", data.alien_number); 
        fclose(fp);
    }  
}

void SavedGames::read_saved_data(SDFileSystem &sd, N5110 &lcd){
    //opens file  
    FILE *fp = fopen("/sd/SavedGames.txt", "r");
    
    if (fp == NULL) {
        error_open_file(lcd);
        return;
        
    //Reads saved data into vector 
    }else{
        int line_number = 0;  
        int *data_array; 
        
        //count number of lines in files
        while (fscanf(fp, "%*d") != EOF) {
            line_number++;  
        }
    
        //creats data arrays
        data_array = (int *)calloc(line_number, sizeof (int));
        
        //Reads into arrays
        int i = 0;
        rewind(fp); 
        while (fscanf(fp, "%d",&data_array[i]) != EOF) {
            i++;  
        }
        
        // puts array data into structs and sotres structs in vector
        for(int i = 0; i <= line_number; i+=4){
            //creats objects
            SavedGamesData data;
            
            //sets data
            data.score = data_array[i];
            data.lives = data_array[i+1];
            data.smart_bombs = data_array[i+2];
            data.alien_number = data_array[i+3];
            
            //store object in vector
            saved_data_vector.push_back(data);                    
        }
        
        fclose(fp); 
    } 
}

void SavedGames::display_saved_games(N5110 &lcd){
    lcd.clear();
    //prints saved game screen
    lcd.printString("Saved Games",9,1);
    lcd.drawSprite(39, 16, 3, 5, (int *)arrow_up);
    lcd.drawSprite(39, 32, 3, 5, (int *)arrow_down);
    
    //prints saved game that is displayed
    char buffer[9]; 
    sprintf(buffer,"Save = %2d",display_data_number_);
    lcd.printString(buffer,15,3);
    
    lcd.refresh();
}
bool SavedGames::get_error(){
    return error_;   
}

void SavedGames::saved_games_scroll(Gamepad &pad, Direction d_) {
    // Changes displayed manu part depending on joystick input
    if (d_ == N || d_ == NE || d_ == NW ) {   
        display_data_number_++;
        
        //loops back round when at end of saved game vecotr
        if(display_data_number_ == saved_data_vector.size()){
          display_data_number_ = 0; 
        }        
    } else if (d_ == S || d_ == SW || d_ == SE) {
        display_data_number_--;
         if(display_data_number_ < 0 ){
          display_data_number_ = saved_data_vector.size() - 1; 
        }
    }
    wait(0.15);
}