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
  19   if(FR_OK == f_chdir(JUMPNRUN_PATH) &&
  20      FR_OK == f_open(&fd, PROGRESS_FNAME, FA_OPEN_EXISTING | FA_READ)) {
  21     UINT bytes;
  22     f_read(&fd, &progress, sizeof(progress), &bytes);
  23     f_close(&fd);
  24   }
  25
  26   return progress;
  27 }
  28
  29 static void jumpnrun_save_progress(uint8_t progress) {
  30   FIL fd;
  31
  32   if(FR_OK == f_chdir(JUMPNRUN_PATH) &&
  33      FR_OK == f_open(&fd, PROGRESS_FNAME, FA_CREATE_ALWAYS | FA_WRITE)) {
  34     UINT bytes;
  35     f_write(&fd, &progress, sizeof(progress), &bytes);
  36     f_close(&fd);
  37   }
  38 }
  39
  40 static uint8_t jumpnrun_pick_level_from_fd(char *buf, size_t *first_visible, size_t *selected, uint8_t progress, FIL *fd) {
  41   unsigned levelcount = 0;
  42
  43   {
  44     char buf[MENU_BUFLEN];
  45     while(f_gets(buf, MENU_BUFLEN, fd) && levelcount <= progress) {
  46       ++levelcount;
  47     }
  48   }
  49
  50   if(FR_OK != f_lseek(fd, 0)) {
  51     return JUMPNRUN_ERROR;
  52   }
  53
  54   char menu_buf[levelcount + 1][MENU_BUFLEN];
  55   char const *menu_index[levelcount + 1];
  56   char const *fnames[levelcount + 1];
  57   unsigned i;
  58
  59   for(i = 0; i < levelcount && f_gets(menu_buf[i], MENU_BUFLEN, fd); ++i) {
  60     menu_index[i] = menu_buf[i];
  61     char *p;
  62     for(p = menu_buf[i]; *p && *p != '|'; ++p)
  63       ;
  64     if(*p) {
  65       *p++ = '\0';
  66     }
  67     fnames[i] = p;
  68   }
  69
  70   strcpy(menu_buf[i], "exit");
  71   menu_index[i] = menu_buf[i];
  72   size_t choice = badge_menu(menu_index, i + 1, first_visible, *selected);
  73
  74   if(choice == levelcount) {
  75     return 1; // exit
  76   }
  77
  78   *selected = choice;
  79   strncpy(buf, fnames[*selected], LEVELFILE_MAX);
  80   buf[LEVELFILE_MAX] = '\0';
  81   return 0;
  82 }
  83
  84 static uint8_t jumpnrun_pick_level(char *buf, size_t *first_visible, size_t *selected, uint8_t progress) {
  85   FIL fd;
  86
  87   if(FR_OK != f_chdir(JUMPNRUN_PATH) ||
  88      FR_OK != f_open(&fd, "levels.lst", FA_OPEN_EXISTING | FA_READ)) {
  89     return JUMPNRUN_ERROR;
  90   }
  91
  92   uint8_t err = jumpnrun_pick_level_from_fd(buf, first_visible, selected, progress, &fd);
  93
  94   f_close(&fd);
  95
  96   return err;
  97 }
  98
  99 void jumpnrun_play(void) {
 100   char buf[LEVELFILE_MAX + 1];
 101   size_t first_visible = 0;
 102   size_t selected = 0;
 103   uint8_t progress = jumpnrun_load_progress();
 104
 105   while(0 == jumpnrun_pick_level(buf, &first_visible, &selected, progress)) {
 106     if(JUMPNRUN_WON == jumpnrun_play_level(buf) && selected == progress) {
 107       selected = ++progress;
 108       jumpnrun_save_progress(progress);
 109     }
 110   }
 111 }