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/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/******************************************************************************/
/******************************************************************************/
/* WARNING!!!! do NOT add this header in any include file or any code file */
/* not being a modapi file!!!!!!!! */
/******************************************************************************/
/******************************************************************************/
#ifndef C_INTERNAL_H_
#define C_INTERNAL_H_
extern "C" {
#include <lua.h>
#include <lauxlib.h>
}
#include "common/c_types.h"
/*
Define our custom indices into the Lua registry table.
Lua 5.2 and above define the LUA_RIDX_LAST macro. Only numbers above that
may be used for custom indices, anything else is reserved.
Lua 5.1 / LuaJIT do not use any numeric indices (only string indices),
so we can use numeric indices freely.
*/
#ifdef LUA_RIDX_LAST
#define CUSTOM_RIDX_BASE ((LUA_RIDX_LAST)+1)
#else
#define CUSTOM_RIDX_BASE 1
#endif
#define CUSTOM_RIDX_SCRIPTAPI (CUSTOM_RIDX_BASE)
#define CUSTOM_RIDX_GLOBALS_BACKUP (CUSTOM_RIDX_BASE + 1)
#define CUSTOM_RIDX_CURRENT_MOD_NAME (CUSTOM_RIDX_BASE + 2)
#define CUSTOM_RIDX_ERROR_HANDLER (CUSTOM_RIDX_BASE + 3)
// Pushes the error handler onto the stack and returns its index
#define PUSH_ERROR_HANDLER(L) \
(lua_rawgeti((L), LUA_REGISTRYINDEX, CUSTOM_RIDX_ERROR_HANDLER), lua_gettop((L)))
#define PCALL_RESL(L, RES) do { \
int result_ = (RES); \
if (result_ != 0) { \
script_error((L), result_, NULL, __FUNCTION__); \
} \
} while (0)
#define script_run_callbacks(L, nargs, mode) \
script_run_callbacks_f((L), (nargs), (mode), __FUNCTION__)
// What script_run_callbacks does with the return values of callbacks.
// Regardless of the mode, if only one callback is defined,
// its return value is the total return value.
// Modes only affect the case where 0 or >= 2 callbacks are defined.
enum RunCallbacksMode
{
// Returns the return value of the first callback
// Returns nil if list of callbacks is empty
RUN_CALLBACKS_MODE_FIRST,
// Returns the return value of the last callback
// Returns nil if list of callbacks is empty
RUN_CALLBACKS_MODE_LAST,
// If any callback returns a false value, the first such is returned
// Otherwise, the first callback's return value (trueish) is returned
// Returns true if list of callbacks is empty
RUN_CALLBACKS_MODE_AND,
// Like above, but stops calling callbacks (short circuit)
// after seeing the first false value
RUN_CALLBACKS_MODE_AND_SC,
// If any callback returns a true value, the first such is returned
// Otherwise, the first callback's return value (falseish) is returned
// Returns false if list of callbacks is empty
RUN_CALLBACKS_MODE_OR,
// Like above, but stops calling callbacks (short circuit)
// after seeing the first true value
RUN_CALLBACKS_MODE_OR_SC,
// Note: "a true value" and "a false value" refer to values that
// are converted by lua_toboolean to true or false, respectively.
};
std::string script_get_backtrace(lua_State *L);
int script_error_handler(lua_State *L);
int script_exception_wrapper(lua_State *L, lua_CFunction f);
void script_error(lua_State *L, int pcall_result, const char *mod, const char *fxn);
void script_run_callbacks_f(lua_State *L, int nargs,
RunCallbacksMode mode, const char *fxn);
void log_deprecated(lua_State *L, const std::string &message);
#endif /* C_INTERNAL_H_ */
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