badge/jumpnrun/starter.c

   1 #include "jumpnrun.h"
   2 #include "../ui/menu.h"
   3
   4 #include <drivers/fatfs/ff.h>
   5
   6 enum {
   7   LEVELFILE_MAX        = 12,
   8   LEVELDESCRIPTION_MAX = 14,
   9   MENU_BUFLEN          = LEVELDESCRIPTION_MAX + 1 + LEVELFILE_MAX + 1
  10 };
  11
  12 #define PROGRESS_FNAME "progress.dat"
  13
  14 static uint8_t jumpnrun_load_progress(void) {
  15   uint8_t progress = 0;
  16   FIL fd;
  17
  18   if(FR_OK == f_open(&fd, PROGRESS_FNAME, FA_OPEN_EXISTING | FA_READ)) {
  19     UINT bytes;
  20     f_read(&fd, &progress, sizeof(progress), &bytes);
  21     f_close(&fd);
  22   }
  23
  24   return progress;
  25 }
  26
  27 static void jumpnrun_save_progress(uint8_t progress) {
  28   FIL fd;
  29
  30   if(FR_OK == f_open(&fd, PROGRESS_FNAME, FA_CREATE_ALWAYS | FA_WRITE)) {
  31     UINT bytes;
  32     f_write(&fd, &progress, sizeof(progress), &bytes);
  33     f_close(&fd);
  34   }
  35 }
  36
  37 static uint8_t jumpnrun_pick_level_from_fd(char *buf, size_t *first_visible, size_t *selected, uint8_t progress, FIL *fd) {
  38   unsigned levelcount = 0;
  39
  40   {
  41     char buf[MENU_BUFLEN];
  42     while(f_gets(buf, MENU_BUFLEN, fd) && levelcount <= progress) {
  43       ++levelcount;
  44     }
  45   }
  46
  47   if(FR_OK != f_lseek(fd, 0)) {
  48     return JUMPNRUN_ERROR;
  49   }
  50
  51   char menu_buf[levelcount + 1][MENU_BUFLEN];
  52   char const *menu_index[levelcount + 1];
  53   char const *fnames[levelcount + 1];
  54   unsigned i;
  55
  56   for(i = 0; i < levelcount && f_gets(menu_buf[i], MENU_BUFLEN, fd); ++i) {
  57     menu_index[i] = menu_buf[i];
  58     char *p;
  59     for(p = menu_buf[i]; *p && *p != '|'; ++p)
  60       ;
  61     if(*p) {
  62       *p++ = '\0';
  63     }
  64     fnames[i] = p;
  65   }
  66
  67   strcpy(menu_buf[i], "exit");
  68   menu_index[i] = menu_buf[i];
  69   size_t choice = badge_menu(menu_index, i + 1, first_visible, *selected);
  70
  71   if(choice == levelcount) {
  72     return 1; // exit
  73   }
  74
  75   *selected = choice;
  76   strcpy(buf, fnames[*selected]);
  77   return 0;
  78 }
  79
  80 static uint8_t jumpnrun_pick_level(char *buf, size_t *first_visible, size_t *selected, uint8_t progress) {
  81   FIL fd;
  82
  83   if(FR_OK != f_open(&fd, "levels.lst", FA_OPEN_EXISTING | FA_READ)) {
  84     return JUMPNRUN_ERROR;
  85   }
  86
  87   uint8_t err = jumpnrun_pick_level_from_fd(buf, first_visible, selected, progress, &fd);
  88
  89   f_close(&fd);
  90
  91   return err;
  92 }
  93
  94 void jumpnrun_play(void) {
  95   char buf[LEVELFILE_MAX + 1];
  96   size_t first_visible = 0;
  97   size_t selected = 0;
  98   uint8_t progress = jumpnrun_load_progress();
  99
 100   while(0 == jumpnrun_pick_level(buf, &first_visible, &selected, progress)) {
 101     if(JUMPNRUN_WON == jumpnrun_play_level(buf) && selected == progress) {
 102       selected = ++progress;
 103       jumpnrun_save_progress(progress);
 104     }
 105   }
 106 }