1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
// ==============================================================
// This file is part of Glest Shared Library (www.glest.org)
//
// Copyright (C) 2001-2008 Martio Figueroa
//
// You can redistribute this code and/or modify it under
// the terms of the GNU General Public License as published
// by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version
// ==============================================================
#include "lua_script.h"
#include <stdexcept>
#include "conversion.h"
#include "leak_dumper.h"
using namespace std;
using namespace Shared::Util;
namespace Shared{ namespace Lua{
// =====================================================
// class LuaScript
// =====================================================
LuaScript::LuaScript(){
luaState= luaL_newstate();
luaL_openlibs(luaState);
if(luaState==NULL){
throw runtime_error("Can not allocate lua state");
}
argumentCount= -1;
}
LuaScript::~LuaScript(){
lua_close(luaState);
}
void LuaScript::loadCode(const string &code, const string &name){
int errorCode= luaL_loadbuffer(luaState, code.c_str(), code.size(), name.c_str());
if(errorCode!=0){
throw runtime_error("Error loading lua code: " + errorToString(errorCode));
}
//run code
errorCode= lua_pcall(luaState, 0, 0, 0)!=0;
if(errorCode!=0){
throw runtime_error("Error initializing lua: " + errorToString(errorCode));
}
}
void LuaScript::beginCall(const string& functionName){
lua_getglobal(luaState, functionName.c_str());
argumentCount= 0;
}
void LuaScript::endCall(){
lua_pcall(luaState, argumentCount, 0, 0);
}
void LuaScript::registerFunction(LuaFunction luaFunction, const string &functionName){
lua_pushcfunction(luaState, luaFunction);
lua_setglobal(luaState, functionName.c_str());
}
string LuaScript::errorToString(int errorCode){
string error;
switch(errorCode){
case LUA_ERRSYNTAX:
error+= "Syntax error";
break;
case LUA_ERRRUN:
error+= "Runtime error";
break;
case LUA_ERRMEM:
error+= "Memory allocation error";
break;
case LUA_ERRERR:
error+= "Error while running the error handler";
break;
default:
error+= "Unknown error";
}
error += string(": ")+luaL_checkstring(luaState, -1);
return error;
}
// =====================================================
// class LuaArguments
// =====================================================
LuaArguments::LuaArguments(lua_State *luaState){
this->luaState= luaState;
returnCount= 0;
}
int LuaArguments::getInt(int argumentIndex) const{
if(!lua_isnumber(luaState, argumentIndex)){
throwLuaError("Can not get int from Lua state");
}
return luaL_checkint(luaState, argumentIndex);
}
string LuaArguments::getString(int argumentIndex) const{
if(!lua_isstring(luaState, argumentIndex)){
throwLuaError("Can not get string from Lua state");
}
return luaL_checkstring(luaState, argumentIndex);
}
Vec2i LuaArguments::getVec2i(int argumentIndex) const{
Vec2i v;
if(!lua_istable(luaState, argumentIndex)){
throwLuaError("Can not get vec2i from Lua state, value on the stack is not a table");
}
if(luaL_getn(luaState, argumentIndex)!=2){
throwLuaError("Can not get vec2i from Lua state, array size not 2");
}
lua_rawgeti(luaState, argumentIndex, 1);
v.x= luaL_checkint(luaState, argumentIndex);
lua_pop(luaState, 1);
lua_rawgeti(luaState, argumentIndex, 2);
v.y= luaL_checkint(luaState, argumentIndex);
lua_pop(luaState, 1);
return v;
}
void LuaArguments::returnInt(int value){
++returnCount;
lua_pushinteger(luaState, value);
}
void LuaArguments::returnString(const string &value){
++returnCount;
lua_pushstring(luaState, value.c_str());
}
void LuaArguments::returnVec2i(const Vec2i &value){
++returnCount;
lua_newtable(luaState);
lua_pushnumber(luaState, value.x);
lua_rawseti(luaState, -2, 1);
lua_pushnumber(luaState, value.y);
lua_rawseti(luaState, -2, 2);
}
void LuaArguments::throwLuaError(const string &message) const{
string stackString;
int stackSize = lua_gettop(luaState);
//build stack string
for(int i= 1; i<=stackSize; ++i){
stackString+= "-" + intToStr(i) + ": ";
if(lua_isnumber(luaState, -i)){
stackString+= "Number: " + doubleToStr(luaL_checknumber(luaState, -i ));
}
else if(lua_isstring(luaState, -i)){
stackString+= "String: " + string(luaL_checkstring(luaState, -i));
}
else if(lua_istable(luaState, -i)){
stackString+= "Table (" + intToStr(luaL_getn(luaState, -i)) + ")";
}
else
{
stackString+= "Unknown";
}
stackString+= "\n";
}
throw runtime_error("Lua error: " + message + "\n\nLua Stack:\n" + stackString);
}
}}//end namespace
|
