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][MENU_BUFLEN];
  52   char const *menu_index[levelcount];
  53   char const *fnames[levelcount];
  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   *selected = badge_menu(menu_index, i, first_visible, *selected);
  68
  69   strcpy(buf, fnames[*selected]);
  70   return 0;
  71 }
  72
  73 static uint8_t jumpnrun_pick_level(char *buf, size_t *first_visible, size_t *selected, uint8_t progress) {
  74   FIL fd;
  75
  76   if(FR_OK != f_open(&fd, "levels.lst", FA_OPEN_EXISTING | FA_READ)) {
  77     return JUMPNRUN_ERROR;
  78   }
  79
  80   uint8_t err = jumpnrun_pick_level_from_fd(buf, first_visible, selected, progress, &fd);
  81
  82   f_close(&fd);
  83
  84   return err;
  85 }
  86
  87 void jumpnrun_play(void) {
  88   char buf[LEVELFILE_MAX + 1];
  89   size_t first_visible = 0;
  90   size_t selected = 0;
  91   uint8_t progress = jumpnrun_load_progress();
  92
  93   while(0 == jumpnrun_pick_level(buf, &first_visible, &selected, progress)) {
  94     if(JUMPNRUN_WON == jumpnrun_play_level(buf) && selected == progress) {
  95       selected = ++progress;
  96       jumpnrun_save_progress(progress);
  97     }
  98   }
  99 }