map.c

#include <stdlib.h>
#include "json_tk.h"
#include "map.h"

void map_set_meta(struct map *map, void *data) {
  map->meta_data = data;
}

void *map_get_meta(struct map *map) {
  return map->meta_data;
}

void *map_get(struct map* map, int x, int y)
{
  int chunk_id = (x / map->chunk_size) + (y / map->chunk_size) * map->w_chunks;
  struct map_chunk *chunk = &map->chunks[chunk_id];
  if (!chunk->chunk_data) {
    return NULL;
  }
  return chunk->data[(x % map->chunk_size) + (y % map->chunk_size) * map->chunk_size];
}

#define map_xy(map, x, y) \
  map->chunks[(x / map->chunk_size) + (y / map->chunk_size) * map->w_chunks].data[x % map->chunk_size + (y % map->chunk_size) * map->chunk_size]
#include <stdio.h>
void map_set(struct map* map, int x, int y, void* map_data)
{
  if (x < 0 || y < 0 || x >= map->width || y >= map->width) {
    return;
  }

  int chunk_id = (x / map->chunk_size) + (y / map->chunk_size) * map->w_chunks;
  struct map_chunk *chunk = &map->chunks[chunk_id];
  if (!chunk->data) {
    chunk->data = calloc(1, map->chunk_size * map->chunk_size * sizeof(void*));
  }
  chunk->data[(x % map->chunk_size) + (y % map->chunk_size) * map->chunk_size] = map_data;
}

void map_foreach_chunk(struct map* map, int in_x, int in_y, int in_w, int in_h,
    void(*cb)(int, int, struct map_chunk*, void*), void *cb_data)
{
  int x_start = in_x / map->chunk_size;
  int x_end   = (in_x + in_w + map->chunk_size - 1) / map->chunk_size;
  int y_start = in_y / map->chunk_size;
  int y_end   = (in_y + in_h + map->chunk_size - 1) / map->chunk_size;

  for (int y = y_start; y < y_end; ++y) {
    for (int x = x_start; x < x_end; ++x) {
      cb(x, y, &map->chunks[y * map->w_chunks + x], cb_data);
    }
  }
}


/* cb(int x, int y, void* map_data, void* user_data) */
void map_foreach(struct map* map, int in_x, int in_y, int in_w, int in_h, void(*cb)(int, int, void*, void*), void* cb_data)
{
  /* XXX debug-mode ... use asserts */
  if (in_x < 0 || in_y < 0 || in_x >= map->width || in_y >= map->height) {
    return;
  }
  if (in_x + in_w > map->width || in_y + in_h > map->height) {
    return;
  }

  for (int y = in_y; y < in_y + in_h; ++y) {
    for (int x = in_x; x < in_x + in_w; ++x) {
      cb(x, y, map_xy(map, x, y), cb_data);
    }
  }
}
#include <stdio.h>
/* XXX PLEASE FIXME */
struct map *map_load(char *data, size_t length)
{
  struct map *ret = calloc(1, sizeof(*ret));
  json_value *v = json_parse(data, length);
  printf("%d\n", json_find_int(v, "height"));
  printf("%d\n", json_find_int(v, "width"));
  json_value *map_data = json_find_recursive(v, "data");
  printf("%p\n", map_data);
  json_value ** array = json_array_get_values(map_data);
  int len = json_array_get_length(map_data);
  for (int i = 0 ; i < len; ++i) {
    printf("%i", (int)array[i]->u.integer);
  }
  return ret;
}

struct map *map_new(int width, int height, int chunk_size, int type)
{
  struct map *ret = calloc(1, sizeof(*ret));
  ret->width = width;
  ret->height = height;
  ret->chunk_size = chunk_size;
  ret->w_chunks = (width + (ret->chunk_size - 1)) / ret->chunk_size;
  ret->h_chunks = (height + (ret->chunk_size - 1)) / ret->chunk_size;
  ret->chunks = calloc(1, sizeof(*ret->chunks) * ret->w_chunks * ret->h_chunks);
  ret->type = type;
  return ret;
}

void map_free(struct map *map)
{
  free(map->chunks);
  free(map);
}