933 lines
35 KiB
C++
933 lines
35 KiB
C++
/*
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* LuaTables++
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* Copyright (c) 2013-2014 Martin Felis <martin@fyxs.org>.
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "luatables.h"
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#include <assert.h>
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#include <iostream>
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#include <cstdlib>
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#include <vector>
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#include <sstream>
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#include <cmath>
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extern "C"
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{
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#include <lua.h>
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#include <lauxlib.h>
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#include <lualib.h>
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}
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#include <stdio.h> /* defines FILENAME_MAX */
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#if defined(WIN32) || defined (_WIN32)
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#include <direct.h>
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#define get_current_dir _getcwd
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#define DIRECTORY_SEPARATOR "\\"
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#elif defined(linux) || defined (__linux) || defined(__linux__) || defined(__APPLE__)
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#include <unistd.h>
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#define get_current_dir getcwd
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#define DIRECTORY_SEPARATOR "/"
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#else
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#error Platform not supported!
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#endif
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using namespace std;
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std::string get_file_directory (const char* filename) {
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string name (filename);
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string result = name.substr(0, name.find_last_of (DIRECTORY_SEPARATOR) + 1);
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if (result == "")
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result = "./";
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#if defined (WIN32) || defined (_WIN32)
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else if (result.substr(1,2) != ":\\")
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result = string(".\\") + result;
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#else
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else if (result.substr(0,string(DIRECTORY_SEPARATOR).size()) != DIRECTORY_SEPARATOR && result[0] != '.')
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result = string("./") + result;
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#endif
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return result;
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}
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// char encoded serialize function that is available in plaintext in
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// utils/serialize.lua. Converted using lua auto.lua serialize.lua
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const char serialize_lua[] = {
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0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x20, 0x73, 0x65, 0x72, 0x69, 0x61, 0x6c, 0x69, 0x7a, 0x65, 0x0a,
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};
|
|
|
|
//
|
|
// Lua Helper Functions
|
|
//
|
|
void bail(lua_State *L, const char *msg){
|
|
std::cerr << msg << lua_tostring(L, -1) << endl;
|
|
abort();
|
|
}
|
|
|
|
void stack_print (const char *file, int line, lua_State *L) {
|
|
cout << file << ":" << line << ": stack size: " << lua_gettop(L) << endl;;
|
|
for (int i = 1; i < lua_gettop(L) + 1; i++) {
|
|
cout << file << ":" << line << ": ";
|
|
cout << i << ": ";
|
|
if (lua_istable (L, i))
|
|
cout << " table: " << lua_topointer (L, i) << endl;
|
|
else if (lua_isnumber (L, i))
|
|
cout << " number: " << lua_tonumber (L, i) << endl;
|
|
else if (lua_isuserdata (L, i)) {
|
|
void* userdata = (void*) lua_touserdata (L, i);
|
|
cout << " userdata (" << userdata << ")" << endl;
|
|
} else if (lua_isstring (L, i))
|
|
cout << " string: " << lua_tostring(L, i) << endl;
|
|
else if (lua_isfunction (L, i))
|
|
cout << " function" << endl;
|
|
else if (lua_isnil (L, i))
|
|
cout << " nil" << endl;
|
|
else
|
|
cout << " unknown: " << lua_typename (L, lua_type (L, i)) << endl;
|
|
}
|
|
}
|
|
|
|
void l_push_LuaKey (lua_State *L, const LuaKey &key) {
|
|
if (key.type == LuaKey::Integer)
|
|
lua_pushnumber (L, key.int_value);
|
|
else
|
|
lua_pushstring(L, key.string_value.c_str());
|
|
}
|
|
|
|
bool query_key_stack (lua_State *L, std::vector<LuaKey> key_stack) {
|
|
for (int i = key_stack.size() - 1; i >= 0; i--) {
|
|
// get the global value when the result of a lua expression was not
|
|
// pushed onto the stack via the return statement.
|
|
if (lua_gettop(L) == 0) {
|
|
lua_getglobal (L, key_stack[key_stack.size() - 1].string_value.c_str());
|
|
|
|
if (lua_isnil(L, -1)) {
|
|
return false;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
l_push_LuaKey (L, key_stack[i]);
|
|
|
|
lua_gettable (L, -2);
|
|
|
|
// return if key is not found
|
|
if (lua_isnil(L, -1)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void create_key_stack (lua_State *L, std::vector<LuaKey> key_stack) {
|
|
for (int i = key_stack.size() - 1; i > 0; i--) {
|
|
// get the global value when the result of a lua expression was not
|
|
// pushed onto the stack via the return statement.
|
|
if (lua_gettop(L) == 0) {
|
|
lua_getglobal (L, key_stack[key_stack.size() - 1].string_value.c_str());
|
|
|
|
if (lua_isnil(L, -1)) {
|
|
lua_pop(L, 1);
|
|
lua_newtable(L);
|
|
lua_pushvalue(L, -1);
|
|
lua_setglobal(L, key_stack[key_stack.size() - 1].string_value.c_str());
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
l_push_LuaKey (L, key_stack[i]);
|
|
|
|
lua_pushvalue (L, -1);
|
|
lua_gettable (L, -3);
|
|
|
|
if (lua_isnil(L, -1)) {
|
|
// parent, key, nil
|
|
lua_pop(L, 1); // parent, key
|
|
lua_newtable(L); // parent, key, table
|
|
lua_insert(L, -2); // parent, table, key
|
|
lua_pushvalue(L, -2); // parent, table, key, table
|
|
lua_settable (L, -4); // parent, table
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// LuaTableNode
|
|
//
|
|
std::vector<LuaKey> LuaTableNode::getKeyStack() {
|
|
std::vector<LuaKey> result;
|
|
|
|
const LuaTableNode *node_ptr = this;
|
|
|
|
do {
|
|
result.push_back (node_ptr->key);
|
|
node_ptr = node_ptr->parent;
|
|
} while (node_ptr != NULL);
|
|
|
|
return result;
|
|
}
|
|
|
|
std::string LuaTableNode::keyStackToString() {
|
|
std::vector<LuaKey> key_stack = getKeyStack();
|
|
|
|
ostringstream result_stream ("");
|
|
for (int i = key_stack.size() - 1; i >= 0; i--) {
|
|
if (key_stack[i].type == LuaKey::String)
|
|
result_stream << "[\"" << key_stack[i].string_value << "\"]";
|
|
else
|
|
result_stream << "[" << key_stack[i].int_value << "]";
|
|
}
|
|
|
|
return result_stream.str();
|
|
}
|
|
|
|
bool LuaTableNode::stackQueryValue() {
|
|
luaTable->pushRef();
|
|
|
|
lua_State *L = luaTable->L;
|
|
stackTop = lua_gettop(L);
|
|
|
|
std::vector<LuaKey> key_stack = getKeyStack();
|
|
|
|
return query_key_stack (L, key_stack);
|
|
}
|
|
|
|
void LuaTableNode::stackCreateValue() {
|
|
luaTable->pushRef();
|
|
|
|
lua_State *L = luaTable->L;
|
|
stackTop = lua_gettop(L);
|
|
|
|
std::vector<LuaKey> key_stack = getKeyStack();
|
|
|
|
create_key_stack (L, key_stack);
|
|
}
|
|
|
|
LuaTable LuaTableNode::stackQueryTable() {
|
|
luaTable->pushRef();
|
|
|
|
lua_State *L = luaTable->L;
|
|
stackTop = lua_gettop(L);
|
|
|
|
std::vector<LuaKey> key_stack = getKeyStack();
|
|
|
|
if (!query_key_stack (L, key_stack)) {
|
|
std::cerr << "Error: could not query table " << key << "." << std::endl;
|
|
abort();
|
|
}
|
|
|
|
return LuaTable::fromLuaState (L);
|
|
}
|
|
|
|
LuaTable LuaTableNode::stackCreateLuaTable() {
|
|
luaTable->pushRef();
|
|
|
|
lua_State *L = luaTable->L;
|
|
stackTop = lua_gettop(L);
|
|
|
|
std::vector<LuaKey> key_stack = getKeyStack();
|
|
|
|
create_key_stack (L, key_stack);
|
|
|
|
// create new table for the CustomType
|
|
lua_newtable(luaTable->L); // parent, CustomTable
|
|
// add table of CustomType to the parent
|
|
stackPushKey(); // parent, CustomTable, key
|
|
lua_pushvalue(luaTable->L, -2); // parent, CustomTable, key, CustomTable
|
|
lua_settable(luaTable->L, -4);
|
|
|
|
LuaTable result;
|
|
result.luaStateRef = luaTable->luaStateRef->acquire();
|
|
lua_pushvalue (result.luaStateRef->L, -1);
|
|
result.luaRef = luaL_ref (result.luaStateRef->L, LUA_REGISTRYINDEX);
|
|
|
|
lua_pop (luaTable->luaStateRef->L, 2);
|
|
|
|
return result;
|
|
}
|
|
|
|
void LuaTableNode::stackPushKey() {
|
|
l_push_LuaKey (luaTable->L, key);
|
|
}
|
|
|
|
void LuaTableNode::stackRestore() {
|
|
lua_pop (luaTable->L, lua_gettop(luaTable->L) - stackTop);
|
|
|
|
luaTable->popRef();
|
|
}
|
|
|
|
bool LuaTableNode::exists() {
|
|
bool result = true;
|
|
|
|
if (!stackQueryValue())
|
|
result = false;
|
|
|
|
stackRestore();
|
|
|
|
return result;
|
|
}
|
|
|
|
void LuaTableNode::remove() {
|
|
if (stackQueryValue()) {
|
|
lua_pop(luaTable->L, 1);
|
|
|
|
if (lua_gettop(luaTable->L) != 0) {
|
|
l_push_LuaKey (luaTable->L, key);
|
|
lua_pushnil (luaTable->L);
|
|
lua_settable (luaTable->L, -3);
|
|
} else {
|
|
lua_pushnil (luaTable->L);
|
|
lua_setglobal (luaTable->L, key.string_value.c_str());
|
|
}
|
|
}
|
|
|
|
stackRestore();
|
|
}
|
|
|
|
size_t LuaTableNode::length() {
|
|
size_t result = 0;
|
|
|
|
if (stackQueryValue()) {
|
|
#if LUA_VERSION_NUM == 501
|
|
result = lua_objlen(luaTable->L, -1);
|
|
#elif LUA_VERSION_NUM >= 502
|
|
result = lua_rawlen(luaTable->L, -1);
|
|
#endif
|
|
}
|
|
|
|
stackRestore();
|
|
|
|
return result;
|
|
}
|
|
|
|
std::vector<LuaKey> LuaTableNode::keys() {
|
|
std::vector<LuaKey> result;
|
|
|
|
if (stackQueryValue()) {
|
|
// loop over all keys
|
|
lua_pushnil(luaTable->L);
|
|
while (lua_next(luaTable->L, -2) != 0) {
|
|
if (lua_isnumber(luaTable->L, -2)) {
|
|
double number = lua_tonumber (luaTable->L, -2);
|
|
double frac;
|
|
if (modf (number, &frac) == 0) {
|
|
LuaKey key (static_cast<int>(number));
|
|
result.push_back (key);
|
|
}
|
|
} else if (lua_isstring (luaTable->L, -2)) {
|
|
LuaKey key (lua_tostring(luaTable->L, -2));
|
|
result.push_back (key);
|
|
} else {
|
|
cerr << "Warning: invalid LuaKey type for key " << lua_typename(luaTable->L, lua_type(luaTable->L, -2)) << "!" << endl;
|
|
}
|
|
|
|
lua_pop(luaTable->L, 1);
|
|
}
|
|
}
|
|
|
|
stackRestore();
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
template<> bool LuaTableNode::getDefault<bool>(const bool &default_value) {
|
|
bool result = default_value;
|
|
|
|
if (stackQueryValue()) {
|
|
result = lua_toboolean (luaTable->L, -1);
|
|
}
|
|
|
|
stackRestore();
|
|
|
|
return result;
|
|
}
|
|
|
|
template<> float LuaTableNode::getDefault<float>(const float &default_value) {
|
|
float result = default_value;
|
|
|
|
if (stackQueryValue()) {
|
|
result = static_cast<float>(lua_tonumber (luaTable->L, -1));
|
|
}
|
|
|
|
stackRestore();
|
|
|
|
return result;
|
|
}
|
|
|
|
template<> double LuaTableNode::getDefault<double>(const double &default_value) {
|
|
double result = default_value;
|
|
|
|
if (stackQueryValue()) {
|
|
result = lua_tonumber (luaTable->L, -1);
|
|
}
|
|
|
|
stackRestore();
|
|
|
|
return result;
|
|
}
|
|
|
|
template<> std::string LuaTableNode::getDefault<std::string>(const std::string &default_value) {
|
|
std::string result = default_value;
|
|
|
|
if (stackQueryValue() && lua_isstring(luaTable->L, -1)) {
|
|
result = lua_tostring (luaTable->L, -1);
|
|
}
|
|
|
|
stackRestore();
|
|
|
|
return result;
|
|
}
|
|
|
|
template<> void LuaTableNode::set<bool>(const bool &value) {
|
|
stackCreateValue();
|
|
|
|
l_push_LuaKey (luaTable->L, key);
|
|
lua_pushboolean(luaTable->L, value);
|
|
// stack: parent, key, value
|
|
lua_settable (luaTable->L, -3);
|
|
|
|
stackRestore();
|
|
}
|
|
|
|
template<> void LuaTableNode::set<float>(const float &value) {
|
|
stackCreateValue();
|
|
|
|
l_push_LuaKey (luaTable->L, key);
|
|
lua_pushnumber(luaTable->L, static_cast<double>(value));
|
|
// stack: parent, key, value
|
|
lua_settable (luaTable->L, -3);
|
|
|
|
stackRestore();
|
|
}
|
|
|
|
template<> void LuaTableNode::set<double>(const double &value) {
|
|
stackCreateValue();
|
|
|
|
l_push_LuaKey (luaTable->L, key);
|
|
lua_pushnumber(luaTable->L, value);
|
|
// stack: parent, key, value
|
|
lua_settable (luaTable->L, -3);
|
|
|
|
stackRestore();
|
|
}
|
|
|
|
template<> void LuaTableNode::set<std::string>(const std::string &value) {
|
|
stackCreateValue();
|
|
|
|
l_push_LuaKey (luaTable->L, key);
|
|
lua_pushstring(luaTable->L, value.c_str());
|
|
// stack: parent, key, value
|
|
lua_settable (luaTable->L, -3);
|
|
|
|
stackRestore();
|
|
}
|
|
|
|
//
|
|
// LuaTable
|
|
//
|
|
LuaTable::LuaTable (const LuaTable &other) :
|
|
filename (other.filename),
|
|
referencesGlobal (other.referencesGlobal) {
|
|
if (other.luaStateRef) {
|
|
luaStateRef = other.luaStateRef->acquire();
|
|
|
|
if (!referencesGlobal) {
|
|
lua_rawgeti(luaStateRef->L, LUA_REGISTRYINDEX, other.luaRef);
|
|
luaRef = luaL_ref (luaStateRef->L, LUA_REGISTRYINDEX);
|
|
}
|
|
}
|
|
}
|
|
|
|
LuaTable& LuaTable::operator= (const LuaTable &other) {
|
|
if (&other != this) {
|
|
if (luaStateRef) {
|
|
// cleanup any existing reference
|
|
luaL_unref (luaStateRef->L, LUA_REGISTRYINDEX, luaRef);
|
|
|
|
// if this is the last, delete the Lua state
|
|
int ref_count = luaStateRef->release();
|
|
|
|
if (ref_count == 0) {
|
|
if (luaStateRef->freeOnZeroRefs) {
|
|
lua_close (luaStateRef->L);
|
|
}
|
|
delete luaStateRef;
|
|
luaStateRef = NULL;
|
|
}
|
|
}
|
|
|
|
filename = other.filename;
|
|
luaStateRef = other.luaStateRef;
|
|
referencesGlobal = other.referencesGlobal;
|
|
|
|
if (other.luaStateRef) {
|
|
luaStateRef = other.luaStateRef->acquire();
|
|
|
|
if (!referencesGlobal) {
|
|
lua_rawgeti(luaStateRef->L, LUA_REGISTRYINDEX, other.luaRef);
|
|
luaRef = luaL_ref (luaStateRef->L, LUA_REGISTRYINDEX);
|
|
}
|
|
}
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
LuaTable::~LuaTable() {
|
|
if (luaRef != -1) {
|
|
luaL_unref (luaStateRef->L, LUA_REGISTRYINDEX, luaRef);
|
|
}
|
|
|
|
if (luaStateRef) {
|
|
int ref_count = luaStateRef->release();
|
|
|
|
if (ref_count == 0) {
|
|
if (luaStateRef->freeOnZeroRefs) {
|
|
lua_close (luaStateRef->L);
|
|
}
|
|
delete luaStateRef;
|
|
luaStateRef = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
int LuaTable::length() {
|
|
pushRef();
|
|
|
|
if ((lua_gettop(L) == 0) || (lua_type (L, -1) != LUA_TTABLE)) {
|
|
cerr << "Error: cannot query table length. No table on stack!" << endl;
|
|
abort();
|
|
}
|
|
size_t result = 0;
|
|
|
|
#if LUA_VERSION_NUM == 501
|
|
result = lua_objlen(L, -1);
|
|
#elif LUA_VERSION_NUM >= 502
|
|
result = lua_rawlen(L, -1);
|
|
#endif
|
|
|
|
popRef();
|
|
|
|
return result;
|
|
}
|
|
|
|
void LuaTable::pushRef() {
|
|
assert (luaStateRef);
|
|
assert (luaStateRef->L);
|
|
|
|
if (!referencesGlobal) {
|
|
lua_rawgeti(luaStateRef->L, LUA_REGISTRYINDEX, luaRef);
|
|
}
|
|
L = luaStateRef->L;
|
|
}
|
|
|
|
void LuaTable::popRef() {
|
|
if (!referencesGlobal) {
|
|
lua_pop (luaStateRef->L, 1);
|
|
}
|
|
L = NULL;
|
|
}
|
|
|
|
LuaTable LuaTable::fromFile (const char* _filename) {
|
|
LuaTable result;
|
|
|
|
result.filename = _filename;
|
|
result.luaStateRef = new LuaStateRef();
|
|
result.luaStateRef->L = luaL_newstate();
|
|
result.luaStateRef->count = 1;
|
|
luaL_openlibs (result.luaStateRef->L);
|
|
|
|
// Add the directory of _filename to package.path
|
|
result.addSearchPath(get_file_directory (_filename).c_str());
|
|
|
|
// run the file we
|
|
if (luaL_dofile (result.luaStateRef->L, _filename)) {
|
|
bail (result.luaStateRef->L, "Error running file: ");
|
|
}
|
|
|
|
result.luaRef = luaL_ref (result.luaStateRef->L, LUA_REGISTRYINDEX);
|
|
|
|
return result;
|
|
}
|
|
|
|
LuaTable LuaTable::fromLuaExpression (const char* lua_expr) {
|
|
LuaTable result;
|
|
|
|
result.luaStateRef = new LuaStateRef();
|
|
result.luaStateRef->L = luaL_newstate();
|
|
result.luaStateRef->count = 1;
|
|
luaL_openlibs (result.luaStateRef->L);
|
|
|
|
if (luaL_loadstring (result.luaStateRef->L, lua_expr)) {
|
|
bail (result.luaStateRef->L, "Error compiling expression!");
|
|
}
|
|
|
|
if (lua_pcall (result.luaStateRef->L, 0, LUA_MULTRET, 0)) {
|
|
bail (result.luaStateRef->L, "Error running expression!");
|
|
}
|
|
|
|
if (lua_gettop(result.luaStateRef->L) != 0) {
|
|
result.luaRef = luaL_ref (result.luaStateRef->L, LUA_REGISTRYINDEX);
|
|
} else {
|
|
result.referencesGlobal = true;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
LuaTable LuaTable::fromLuaState (lua_State* L) {
|
|
LuaTable result;
|
|
|
|
result.luaStateRef = new LuaStateRef();
|
|
result.luaStateRef->L = L;
|
|
result.luaStateRef->count = 1;
|
|
result.luaStateRef->freeOnZeroRefs = false;
|
|
|
|
lua_pushvalue (result.luaStateRef->L, -1);
|
|
result.luaRef = luaL_ref (result.luaStateRef->L, LUA_REGISTRYINDEX);
|
|
|
|
return result;
|
|
}
|
|
|
|
void LuaTable::addSearchPath(const char* path) {
|
|
if (luaStateRef->L == NULL) {
|
|
cerr << "Error: Cannot add search path: Lua state is not initialized!" << endl;
|
|
abort();
|
|
}
|
|
|
|
lua_getglobal(luaStateRef->L, "package");
|
|
lua_getfield (luaStateRef->L, -1, "path");
|
|
if (lua_type(luaStateRef->L, -1) != LUA_TSTRING) {
|
|
cerr << "Error: could not get package.path!" << endl;
|
|
abort();
|
|
}
|
|
|
|
string package_path = lua_tostring (luaStateRef->L, -1);
|
|
package_path = package_path + string (";") + string(path) + "?.lua;";
|
|
|
|
lua_pushstring(luaStateRef->L, package_path.c_str());
|
|
lua_setfield (luaStateRef->L, -3, "path");
|
|
|
|
lua_pop(luaStateRef->L, 2);
|
|
}
|
|
|
|
std::string LuaTable::serialize() {
|
|
pushRef();
|
|
|
|
std::string result;
|
|
|
|
int current_top = lua_gettop(L);
|
|
if (lua_gettop(L) != 0) {
|
|
if (luaL_loadstring(L, serialize_lua)) {
|
|
bail (L, "Error loading serialization function: ");
|
|
}
|
|
|
|
if (lua_pcall(L, 0, 0, 0)) {
|
|
bail (L, "Error compiling serialization function: " );
|
|
}
|
|
|
|
lua_getglobal (L, "serialize");
|
|
assert (lua_isfunction (L, -1));
|
|
lua_pushvalue (L, -2);
|
|
if (lua_pcall (L, 1, 1, 0)) {
|
|
bail (L, "Error while serializing: ");
|
|
}
|
|
result = string("return ") + lua_tostring (L, -1);
|
|
} else {
|
|
cerr << "Cannot serialize global Lua state!" << endl;
|
|
abort();
|
|
}
|
|
|
|
lua_pop (L, lua_gettop(L) - current_top);
|
|
|
|
popRef();
|
|
|
|
return result;
|
|
}
|
|
|
|
std::string LuaTable::orderedSerialize() {
|
|
pushRef();
|
|
|
|
std::string result;
|
|
|
|
int current_top = lua_gettop(L);
|
|
if (lua_gettop(L) != 0) {
|
|
if (luaL_loadstring(L, serialize_lua)) {
|
|
bail (L, "Error loading serialization function: ");
|
|
}
|
|
|
|
if (lua_pcall(L, 0, 0, 0)) {
|
|
bail (L, "Error compiling serialization function: " );
|
|
}
|
|
|
|
lua_getglobal (L, "serialize");
|
|
assert (lua_isfunction (L, -1));
|
|
lua_pushvalue (L, -2);
|
|
lua_pushstring (L, "");
|
|
lua_pushboolean (L, true);
|
|
if (lua_pcall (L, 3, 1, 0)) {
|
|
bail (L, "Error while serializing: ");
|
|
}
|
|
result = string("return ") + lua_tostring (L, -1);
|
|
} else {
|
|
cerr << "Cannot serialize global Lua state!" << endl;
|
|
abort();
|
|
}
|
|
|
|
lua_pop (L, lua_gettop(L) - current_top);
|
|
|
|
popRef();
|
|
|
|
return result;
|
|
}
|