LuaUtils.h

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// Copyright © 2008-2021 Pioneer Developers. See AUTHORS.txt for details
// Licensed under the terms of the GPL v3. See licenses/GPL-3.txt
 
#ifndef _LUAUTILS_H
#define _LUAUTILS_H
 
#include "utils.h"
#include <lua.hpp>
#include <string>
 
namespace FileSystem {
    class FileData;
}
 
inline void pi_lua_settable(lua_State *l, const char *key, bool value)
{
    lua_pushstring(l, key);
    lua_pushboolean(l, value);
    lua_rawset(l, -3);
}
 
inline void pi_lua_settable(lua_State *l, const char *key, int value)
{
    lua_pushstring(l, key);
    lua_pushinteger(l, value);
    lua_rawset(l, -3);
}
 
inline void pi_lua_settable(lua_State *l, int key, int value)
{
    lua_pushinteger(l, key);
    lua_pushinteger(l, value);
    lua_rawset(l, -3);
}
 
inline void pi_lua_settable(lua_State *l, const char *key, double value)
{
    lua_pushstring(l, key);
    lua_pushnumber(l, value);
    lua_rawset(l, -3);
}
 
inline void pi_lua_settable(lua_State *l, int key, double value)
{
    lua_pushinteger(l, key);
    lua_pushnumber(l, value);
    lua_rawset(l, -3);
}
 
inline void pi_lua_settable(lua_State *l, int key, const char *value)
{
    lua_pushinteger(l, key);
    lua_pushstring(l, value);
    lua_rawset(l, -3);
}
 
inline void pi_lua_settable(lua_State *l, const char *key, const char *value)
{
    lua_pushstring(l, key);
    lua_pushstring(l, value);
    lua_rawset(l, -3);
}
 
void pi_lua_open_standard_base(lua_State *l);
 
// pushes a read-only proxy table that points at the table at <index>
void pi_lua_readonly_table_proxy(lua_State *l, int index);
// pushes the underlying (read-write) table pointed to by the proxy at <index>
void pi_lua_readonly_table_original(lua_State *l, int index);
 
bool pi_lua_import(lua_State *l, const std::string &importName, bool popImported = false);
void pi_lua_import_recursive(lua_State *L, const std::string &importName);
 
int pi_lua_panic(lua_State *l) __attribute((noreturn));
void pi_lua_protected_call(lua_State *state, int nargs, int nresults);
int pi_lua_loadfile(lua_State *l, const FileSystem::FileData &code);
void pi_lua_dofile(lua_State *l, const std::string &path);
void pi_lua_dofile_recursive(lua_State *l, const std::string &basepath);
 
void pi_lua_warn(lua_State *l, const char *format, ...) __attribute((format(printf, 2, 3)));
 
bool pi_lua_split_table_path(lua_State *l, const std::string &path);
 
int secure_trampoline(lua_State *l);
 
void pi_lua_stacktrace(lua_State *l);
 
#ifdef DEBUG
#define LUA_DEBUG_START(luaptr) const int __luaStartStackDepth = lua_gettop(luaptr)
#define LUA_DEBUG_END(luaptr, expectedStackDiff)                                                   \
    do {                                                                                           \
        const int __luaEndStackDepth = lua_gettop(luaptr);                                         \
        if (__luaEndStackDepth - expectedStackDiff != __luaStartStackDepth) {                      \
            Error("%s:%d: lua stack difference is %d, expected %d",                                \
                __FILE__, __LINE__, __luaEndStackDepth - __luaStartStackDepth, expectedStackDiff); \
        }                                                                                          \
    } while (0)
#define LUA_DEBUG_CHECK(luaptr, expectedStackDiff) LUA_DEBUG_END(luaptr, expectedStackDiff)
#else
#define LUA_DEBUG_START(luaptr)
#define LUA_DEBUG_END(luaptr, expectedStackDiff)
#define LUA_DEBUG_CHECK(luaptr, expectedStackDiff)
#endif
 
#endif