#include <lua.h>

#include <lauxlib.h>

static int lc_xpcall (lua_State *L) {

  int ret;

  int n_arg = lua_gettop(L);

  /* f, msgh, p1, p2... */

  luaL_argcheck(L, n_arg >= 2, 2, "value expected");

  lua_pushvalue(L, 1);  /* f to top */

  lua_pushvalue(L, 2);  /* msgh to top */

  lua_replace(L, 1); /* msgh to 1 */

  lua_replace(L, 2); /* f to 2 */

  /* msgh, f, p1, p2... */

  ret = lua_pcall(L, n_arg - 2, LUA_MULTRET, 1);

  lua_pushboolean(L, ret == 0);

  lua_replace(L, 1);

  return lua_gettop(L);

}

int luaopen_prosody_util_compat(lua_State *L) {

	lua_createtable(L, 0, 2);

	{

		lua_pushcfunction(L, lc_xpcall);

		lua_setfield(L, -2, "xpcall");

	}

	return 1;

}

int luaopen_util_compat(lua_State *L) {

	return luaopen_prosody_util_compat(L);

}