Files
wireplumber/modules/module-lua-scripting/wplua/boxed.c
George Kiagiadakis 5c3032c064 core: change the component arguments to be WpSpaJson instead of GVariant
This allows us to pass entire JSON objects from the config file
down to the modules / scripts without any conversion
2023-05-25 18:29:58 +03:00

110 lines
2.7 KiB
C

/* WirePlumber
*
* Copyright © 2020 Collabora Ltd.
* @author George Kiagiadakis <george.kiagiadakis@collabora.com>
*
* SPDX-License-Identifier: MIT
*/
#include "wplua.h"
#include "private.h"
#include <wp/wp.h>
static lua_CFunction
find_method_in_luaL_Reg (luaL_Reg *reg, const gchar *method)
{
if (reg) {
while (reg->name) {
if (!g_strcmp0 (method, reg->name))
return reg->func;
reg++;
}
}
return NULL;
}
static int
_wplua_gboxed___index (lua_State *L)
{
luaL_argcheck (L, wplua_isboxed (L, 1, G_TYPE_BOXED), 1,
"expected userdata storing GValue<GBoxed>");
GValue *obj_v = lua_touserdata (L, 1);
const gchar *key = luaL_checkstring (L, 2);
GType type = G_VALUE_TYPE (obj_v);
lua_CFunction func = NULL;
GHashTable *vtables;
lua_pushliteral (L, "wplua_vtables");
lua_gettable (L, LUA_REGISTRYINDEX);
vtables = wplua_toboxed (L, -1);
lua_pop (L, 1);
/* search in registered vtables */
while (!func && type) {
luaL_Reg *reg = g_hash_table_lookup (vtables, GUINT_TO_POINTER (type));
func = find_method_in_luaL_Reg (reg, key);
type = g_type_parent (type);
}
wp_trace_boxed (type, g_value_get_boxed (obj_v),
"indexing GBoxed, looking for '%s', found: %p", key, func);
if (func) {
lua_pushcfunction (L, func);
return 1;
}
return 0;
}
void
_wplua_init_gboxed (lua_State *L)
{
static const luaL_Reg gboxed_meta[] = {
{ "__gc", _wplua_gvalue_userdata___gc },
{ "__eq", _wplua_gvalue_userdata___eq },
{ "__index", _wplua_gboxed___index },
{ NULL, NULL }
};
luaL_newmetatable (L, "GBoxed");
luaL_setfuncs (L, gboxed_meta, 0);
lua_pop (L, 1);
}
void
wplua_pushboxed (lua_State * L, GType type, gpointer object)
{
g_return_if_fail (G_TYPE_FUNDAMENTAL (type) == G_TYPE_BOXED);
GValue *v = _wplua_pushgvalue_userdata (L, type);
wp_trace_boxed (type, object, "pushing to Lua, v=%p", v);
g_value_take_boxed (v, object);
luaL_getmetatable (L, "GBoxed");
lua_setmetatable (L, -2);
}
gpointer
wplua_toboxed (lua_State *L, int idx)
{
g_return_val_if_fail (_wplua_isgvalue_userdata (L, idx, G_TYPE_BOXED), NULL);
return g_value_get_boxed ((GValue *) lua_touserdata (L, idx));
}
gpointer
wplua_checkboxed (lua_State *L, int idx, GType type)
{
if (G_UNLIKELY (!_wplua_isgvalue_userdata (L, idx, type))) {
wp_critical ("expected userdata storing GValue<%s>", g_type_name (type));
luaL_argerror (L, idx, "expected userdata storing GValue<GBoxed>");
}
return g_value_get_boxed ((GValue *) lua_touserdata (L, idx));
}
gboolean
wplua_isboxed (lua_State *L, int idx, GType type)
{
if (!g_type_is_a (type, G_TYPE_BOXED)) return FALSE;
return _wplua_isgvalue_userdata (L, idx, type);
}