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#include "AppHdr.h"
#include "cluautil.h"
#include "l_libs.h"
#include "mapdef.h"
/////////////////////////////////////////////////////////////////////
// mapgrd and mapgrd_col handling (i.e. map_lines in a metatable)
struct mapcolumn
{
map_def* map;
int col;
};
static int mapgrd_get(lua_State *ls)
{
// Return a metatable for this column in the map grid.
map_def *map = *(map_def **) luaL_checkudata(ls, 1, MAPGRD_METATABLE);
int column = luaL_checkint(ls, 2);
mapcolumn *mapref = clua_new_userdata<mapcolumn>(ls, MAPGRD_COL_METATABLE);
mapref->map = map;
mapref->col = column;
return (1);
}
static int mapgrd_set(lua_State *ls)
{
return (luaL_error(ls, "%s", "Cannot assign to read-only table."));
}
static char* mapgrd_glyph(lua_State *ls, int &col, int &row)
{
mapcolumn *mapc = (mapcolumn *)luaL_checkudata(ls, 1, MAPGRD_COL_METATABLE);
row = luaL_checkint(ls, 2);
col = mapc->col;
map_lines &lines = mapc->map->map;
if (row < 0 || col < 0 || col >= lines.width() || row >= lines.height())
{
return (NULL);
}
coord_def mc(col, row);
return (&lines(mc));
}
static int mapgrd_col_get(lua_State *ls)
{
int col, row;
char *gly = mapgrd_glyph(ls, col, row);
if (!gly)
return (luaL_error(ls, "Invalid coords: %d, %d", col, row));
char buf[2];
buf[0] = *gly;
buf[1] = '\0';
lua_pushstring(ls, buf);
return (1);
}
static int mapgrd_col_set(lua_State *ls)
{
int col, row;
char *gly = mapgrd_glyph(ls, col, row);
if (!gly)
return (luaL_error(ls, "Invalid coords: %d, %d", col, row));
const char *str = luaL_checkstring(ls, 3);
if (!str[0] || str[1])
return (luaL_error(ls, "%s", "mapgrd must be set to a single char."));
(*gly) = str[0];
return (0);
}
void dluaopen_mapgrd(lua_State *ls)
{
// mapgrd table
luaL_newmetatable(ls, MAPGRD_METATABLE);
lua_pushstring(ls, "__index");
lua_pushcfunction(ls, mapgrd_get);
lua_settable(ls, -3);
lua_pushstring(ls, "__newindex");
lua_pushcfunction(ls, mapgrd_set);
lua_settable(ls, -3);
lua_pop(ls, 1);
// mapgrd col table
luaL_newmetatable(ls, MAPGRD_COL_METATABLE);
lua_pushstring(ls, "__index");
lua_pushcfunction(ls, mapgrd_col_get);
lua_settable(ls, -3);
lua_pushstring(ls, "__newindex");
lua_pushcfunction(ls, mapgrd_col_set);
lua_settable(ls, -3);
lua_pop(ls, 1);
}
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