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5225 alpine 1 
#include "rsgamemenu.h"
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#include "rsgame.h"
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#include "rskos.h"
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#include "strings.h"
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PRSFUNC0 menu_actions[] = {
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    /* a */ &menu_action_start,
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    /* b */ &menu_action_exit,
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    /* c */ &menu_action_change_window_scale
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};
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char window_scale_str[] = "c< 2X >";
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/*
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    First char:
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    - letter a...z means action (a = 0th, b = 1st, c = 2nd, see menu_actions[] above)
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    - number 0...9 means goto menu #0, #1, #2... see menu_titles[] below
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    - space ' ' means no action, menu item is unselectable
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    - empty string "" is now allowed and can cause segfault
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    String from second char is label of menu item
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*/
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char* menu_main_titles[] = {
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    "a"L_START,
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    "1"L_SETTINGS,
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    "2"L_ABOUT,
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    "b"L_QUIT,
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};
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char* menu_settings_titles[] = {
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    " "L_WINDOW_SCALE,
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    window_scale_str,
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    " ",
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    "0"L_DONE,
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};
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char* menu_about_titles[] = {
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    " "L_DEVELOPED_BY,
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    " "L_ROMAN_SHUVALOV,
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    " ",
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    "0"L_DONE,
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};
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char **menu_titles[] = {
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    /* 0 */ menu_main_titles,
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    /* 1 */ menu_settings_titles,
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    /* 2 */ menu_about_titles,
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};
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void menu_cursor_down() {
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    int new_index = game.menu_item_index+1;
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    while ( (menu_titles[game.menu_index][new_index]) ) {
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        if ((menu_titles[game.menu_index][new_index][0] != ' ')) {
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            game.menu_item_index = new_index;
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            game_ding(1);
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            return;
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        };
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        new_index++;
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    };
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};
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void menu_cursor_up() {
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    int new_index = game.menu_item_index-1;
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    while ( new_index+1 ) {
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        if ((menu_titles[game.menu_index][new_index][0] != ' ')) {
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            game.menu_item_index = new_index;
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            game_ding(1);
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            return;
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        };
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        new_index--;
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    };
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};
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void menu_open(int i) {
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    game.menu_index = i;
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    game.menu_item_index = -1;
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    // (menu_cursor_down without sound)
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    int new_index = game.menu_item_index+1;
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    while ( (menu_titles[game.menu_index][new_index]) ) {
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        if ((menu_titles[game.menu_index][new_index][0] != ' ')) {
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            game.menu_item_index = new_index;
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            return;
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        };
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        new_index++;
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    };
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};
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void menu_cursor_click() {
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    char c = menu_titles[game.menu_index][game.menu_item_index][0];
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    game_ding(0);
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    if (c > '9') {
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        // action: call function
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        menu_actions[c - 'a']();
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    }
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    else {
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        // action: navigate to menu
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        menu_open(c - '0');
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    };
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//    DEBUG10f("click: %c \n", c);
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};
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void menu_action_start() {
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    game.status = STATUS_PLAYING;
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    game.tx = GAME_WIDTH/2 - 50;
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    game.ty = GAME_HEIGHT/2 - 10;
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};
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void menu_action_exit() {
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    #ifdef RS_KOS
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        GameTerm();
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    #endif
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    rskos_exit();
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};
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void menu_action_change_window_scale() {
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    game_change_window_scale(1);
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};