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 static uint8_t jumpnrun_pick_level_from_fd(char *buf, size_t *first_visible, size_t *selected, FIL *fd) {
  13   unsigned levelcount = 0;
  14
  15   {
  16     char buf[MENU_BUFLEN];
  17     while(f_gets(buf, MENU_BUFLEN, fd)) {
  18       ++levelcount;
  19     }
  20   }
  21
  22   if(FR_OK != f_lseek(fd, 0)) {
  23     return JUMPNRUN_ERROR;
  24   }
  25
  26   char menu_buf[levelcount][MENU_BUFLEN];
  27   char const *menu_index[levelcount];
  28   char const *fnames[levelcount];
  29   unsigned i;
  30
  31   for(i = 0; i < levelcount && f_gets(menu_buf[i], MENU_BUFLEN, fd); ++i) {
  32     menu_index[i] = menu_buf[i];
  33     char *p;
  34     for(p = menu_buf[i]; *p && *p != '|'; ++p)
  35       ;
  36     if(*p) {
  37       *p++ = '\0';
  38     }
  39     fnames[i] = p;
  40   }
  41
  42   *selected = badge_menu(menu_index, i, first_visible, *selected);
  43
  44   strcpy(buf, fnames[*selected]);
  45   return 0;
  46 }
  47
  48 static uint8_t jumpnrun_pick_level(char *buf, size_t *first_visible, size_t *selected) {
  49   FIL fd;
  50
  51   if(FR_OK != f_open(&fd, "levels.lst", FA_OPEN_EXISTING | FA_READ)) {
  52     return JUMPNRUN_ERROR;
  53   }
  54
  55   uint8_t err = jumpnrun_pick_level_from_fd(buf, first_visible, selected, &fd);
  56
  57   f_close(&fd);
  58
  59   return err;
  60 }
  61
  62 void jumpnrun_play(void) {
  63   char buf[LEVELFILE_MAX + 1];
  64   size_t first_visible = 0;
  65   size_t selected = 0;
  66
  67   while(0 == jumpnrun_pick_level(buf, &first_visible, &selected)) {
  68     jumpnrun_play_level(buf);
  69   }
  70 }