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/*
* File: cluautil.h
* Summary: Utility functions and macros for Lua bindings.
*/
#ifndef CLUAUTIL_H
#define CLUAUTIL_H
extern "C" {
#include <lua.h>
#include <lauxlib.h>
#include <lualib.h>
}
/*
* Function definitions.
*/
#define LUAFN(name) static int name(lua_State *ls)
#define LUAWRAP(name, wrapexpr) \
static int name(lua_State *ls) \
{ \
wrapexpr; \
return (0); \
}
#define PLUARET(type, val) \
lua_push##type(ls, val); \
return (1);
#define LUARET1(name, type, val) \
static int name(lua_State *ls) \
{ \
lua_push##type(ls, val); \
return (1); \
}
#define LUARET2(name, type, val1, val2) \
static int name(lua_State *ls) \
{ \
lua_push##type(ls, val1); \
lua_push##type(ls, val2); \
return (2); \
}
#define ASSERT_DLUA \
do { \
if (CLua::get_vm(ls).managed_vm) \
luaL_error(ls, "Operation forbidden in end-user script"); \
} while (false)
// FIXME: remove one of these.
void luaopen_setmeta(lua_State *ls,
const char *global,
const luaL_reg *lua_lib,
const char *meta);
void clua_register_metatable(lua_State *ls, const char *tn,
const luaL_reg *lr,
int (*gcfn)(lua_State *ls) = NULL);
int clua_stringtable(lua_State *ls, const std::vector<std::string> &s);
/*
* User-data templates.
* TODO: Consolidate these.
*/
template <class T>
inline static T *util_get_userdata(lua_State *ls, int ndx)
{
return (lua_islightuserdata(ls, ndx))?
static_cast<T *>( lua_touserdata(ls, ndx) )
: NULL;
}
template <class T>
inline static T *clua_get_userdata(lua_State *ls, const char *mt, int ndx = 1)
{
return static_cast<T*>( luaL_checkudata( ls, ndx, mt ) );
}
template <class T>
static int lua_object_gc(lua_State *ls)
{
T **pptr = static_cast<T**>( lua_touserdata(ls, 1) );
if (pptr)
delete *pptr;
return (0);
}
template <class T> T *clua_new_userdata(
lua_State *ls, const char *mt)
{
void *udata = lua_newuserdata( ls, sizeof(T) );
luaL_getmetatable(ls, mt);
lua_setmetatable(ls, -2);
return static_cast<T*>( udata );
}
template <typename T>
inline void dlua_push_userdata(lua_State *ls, T udata, const char *meta)
{
T *de = clua_new_userdata<T>(ls, meta);
*de = udata;
}
template <class T>
static int dlua_push_object_type(lua_State *ls, const char *meta, const T &data)
{
T **ptr = clua_new_userdata<T*>(ls, meta);
if (ptr)
*ptr = new T(data);
else
lua_pushnil(ls);
return (1);
}
/*
* Passing objects from and to Lua.
*/
struct activity_interrupt_data;
int push_activity_interrupt(lua_State *ls, activity_interrupt_data *t);
class map_def;
void clua_push_map(lua_State *ls, map_def *map);
void clua_push_coord(lua_State *ls, const coord_def &c);
class dgn_event;
void clua_push_dgn_event(lua_State *ls, const dgn_event *devent);
// XXX: These are currently defined outside cluautil.cc.
class monsters;
void push_monster(lua_State *ls, monsters* mons);
void lua_push_items(lua_State *ls, int link);
dungeon_feature_type check_lua_feature(lua_State *ls, int idx);
item_def *clua_check_item(lua_State *ls, int n);
unsigned int get_tile_idx(lua_State *ls, int arg);
level_id dlua_level_id(lua_State *ls, int ndx);
#define GETCOORD(c, p1, p2, boundfn) \
coord_def c; \
c.x = luaL_checkint(ls, p1); \
c.y = luaL_checkint(ls, p2); \
if (!boundfn(c)) \
luaL_error( \
ls, \
make_stringf("Point (%d,%d) is out of bounds", \
c.x, c.y).c_str()); \
else ;
#define COORDS(c, p1, p2) \
GETCOORD(c, p1, p2, in_bounds)
#define COORDSHOW(c, p1, p2) \
GETCOORD(c, p1, p2, in_show_bounds)
#define FEAT(f, pos) \
dungeon_feature_type f = check_lua_feature(ls, pos)
#define LUA_ITEM(name, n) \
item_def *name = clua_check_item(ls, n);
#define LEVEL(lev, br, pos) \
const char *level_name = luaL_checkstring(ls, pos); \
level_area_type lev = str_to_level_area_type(level_name); \
if (lev == NUM_LEVEL_AREA_TYPES) \
luaL_error(ls, "Expected level name"); \
const char *branch_name = luaL_checkstring(ls, pos); \
branch_type br = str_to_branch(branch_name); \
if (lev == LEVEL_DUNGEON && br == NUM_BRANCHES) \
luaL_error(ls, "Expected branch name");
#define MAP(ls, n, var) \
map_def *var = *(map_def **) luaL_checkudata(ls, n, MAP_METATABLE)
#define LINES(ls, n, var) \
map_lines &var = (*(map_def **) luaL_checkudata(ls, n, MAP_METATABLE))->map
#define DEVENT(ls, n, var) \
dgn_event *var = *(dgn_event **) luaL_checkudata(ls, n, DEVENT_METATABLE)
#define MAPMARKER(ls, n, var) \
map_marker *var = *(map_marker **) luaL_checkudata(ls, n, MAPMARK_METATABLE)
template <typename list, typename lpush>
static int clua_gentable(lua_State *ls, const list &strings, lpush push)
{
lua_newtable(ls);
for (int i = 0, size = strings.size(); i < size; ++i)
{
push(ls, strings[i]);
lua_rawseti(ls, -2, i + 1);
}
return (1);
}
int clua_pushcxxstring(lua_State *ls, const std::string &s);
int clua_pushpoint(lua_State *ls, const coord_def &pos);
#endif
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