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   }
  22
  23   return progress;
  24 }
  25
  26 static void jumpnrun_save_progress(uint8_t progress) {
  27   FIL fd;
  28
  29   if(FR_OK == f_open(&fd, PROGRESS_FNAME, FA_CREATE_NEW | FA_WRITE)) {
  30     UINT bytes;
  31     f_write(&fd, &progress, sizeof(progress), &bytes);
  32   }
  33 }
  34
  35 static uint8_t jumpnrun_pick_level_from_fd(char *buf, size_t *first_visible, size_t *selected, uint8_t progress, FIL *fd) {
  36   unsigned levelcount = 0;
  37
  38   {
  39     char buf[MENU_BUFLEN];
  40     while(f_gets(buf, MENU_BUFLEN, fd) && levelcount <= progress) {
  41       ++levelcount;
  42     }
  43   }
  44
  45   if(FR_OK != f_lseek(fd, 0)) {
  46     return JUMPNRUN_ERROR;
  47   }
  48
  49   char menu_buf[levelcount][MENU_BUFLEN];
  50   char const *menu_index[levelcount];
  51   char const *fnames[levelcount];
  52   unsigned i;
  53
  54   for(i = 0; i < levelcount && f_gets(menu_buf[i], MENU_BUFLEN, fd); ++i) {
  55     menu_index[i] = menu_buf[i];
  56     char *p;
  57     for(p = menu_buf[i]; *p && *p != '|'; ++p)
  58       ;
  59     if(*p) {
  60       *p++ = '\0';
  61     }
  62     fnames[i] = p;
  63   }
  64
  65   *selected = badge_menu(menu_index, i, first_visible, *selected);
  66
  67   strcpy(buf, fnames[*selected]);
  68   return 0;
  69 }
  70
  71 static uint8_t jumpnrun_pick_level(char *buf, size_t *first_visible, size_t *selected, uint8_t progress) {
  72   FIL fd;
  73
  74   if(FR_OK != f_open(&fd, "levels.lst", FA_OPEN_EXISTING | FA_READ)) {
  75     return JUMPNRUN_ERROR;
  76   }
  77
  78   uint8_t err = jumpnrun_pick_level_from_fd(buf, first_visible, selected, progress, &fd);
  79
  80   f_close(&fd);
  81
  82   return err;
  83 }
  84
  85 void jumpnrun_play(void) {
  86   char buf[LEVELFILE_MAX + 1];
  87   size_t first_visible = 0;
  88   size_t selected = 0;
  89   uint8_t progress = jumpnrun_load_progress();
  90
  91   while(0 == jumpnrun_pick_level(buf, &first_visible, &selected, progress)) {
  92     if(JUMPNRUN_WON == jumpnrun_play_level(buf) && selected == progress) {
  93       ++progress;
  94       jumpnrun_save_progress(progress);
  95     }
  96   }
  97 }