1 | /* |
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2 | * ORXONOX - the hottest 3D action shooter ever to exist |
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3 | * > www.orxonox.net < |
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4 | * |
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5 | * |
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6 | * License notice: |
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7 | * |
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8 | * This program is free software; you can redistribute it and/or |
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9 | * modify it under the terms of the GNU General Public License |
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10 | * as published by the Free Software Foundation; either version 2 |
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11 | * of the License, or (at your option) any later version. |
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12 | * |
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13 | * This program is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | * GNU General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU General Public License |
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19 | * along with this program; if not, write to the Free Software |
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20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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21 | * |
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22 | * Author: |
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23 | * Benjamin Knecht |
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24 | * Reto Grieder |
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25 | * Co-authors: |
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26 | * ... |
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27 | * |
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28 | */ |
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29 | |
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30 | #include "LuaState.h" |
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31 | |
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32 | #include <tolua/tolua++.h> |
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33 | extern "C" { |
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34 | #include <lua.h> |
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35 | #include <lualib.h> |
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36 | } |
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37 | |
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38 | #include "util/Debug.h" |
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39 | #include "Resource.h" |
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40 | #include "ToluaBindCore.h" |
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41 | |
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42 | namespace orxonox |
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43 | { |
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44 | LuaState::ToluaInterfaceMap LuaState::toluaInterfaces_s; |
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45 | std::vector<LuaState*> LuaState::instances_s; |
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46 | |
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47 | // Do this after declaring toluaInterfaces_s and instances_s to avoid larger problems |
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48 | DeclareToluaInterface(Core); |
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49 | |
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50 | LuaState::LuaState() |
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51 | : bIsRunning_(false) |
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52 | , includeParseFunction_(NULL) |
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53 | { |
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54 | // Create new lua state and configure it |
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55 | luaState_ = lua_open(); |
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56 | #if LUA_VERSION_NUM == 501 |
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57 | luaL_openlibs(luaState_); |
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58 | #else |
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59 | luaopen_base(luaState_); |
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60 | luaopen_string(luaState_); |
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61 | luaopen_table(luaState_); |
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62 | luaopen_math(luaState_); |
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63 | luaopen_io(luaState_); |
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64 | luaopen_debug(luaState_); |
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65 | #endif |
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66 | |
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67 | // Open all available tolua interfaces |
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68 | this->openToluaInterfaces(luaState_); |
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69 | |
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70 | // Create dummy file info |
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71 | sourceFileInfo_.reset(new ResourceInfo()); |
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72 | sourceFileInfo_->group = "General"; |
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73 | sourceFileInfo_->size = 0; |
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74 | |
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75 | // Push 'this' pointer |
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76 | tolua_pushusertype(luaState_, static_cast<void*>(this), "orxonox::LuaState"); |
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77 | lua_setglobal(luaState_, "luaState"); |
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78 | |
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79 | // Parse init script |
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80 | this->doFile("LuaStateInit.lua"); |
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81 | } |
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82 | |
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83 | LuaState::~LuaState() |
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84 | { |
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85 | lua_close(luaState_); |
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86 | } |
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87 | |
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88 | shared_ptr<ResourceInfo> LuaState::getFileInfo(const std::string& filename, const std::string& resourceGroup, bool bSearchOtherPaths) |
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89 | { |
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90 | shared_ptr<ResourceInfo> sourceInfo; |
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91 | if (resourceGroup != "NoResourceGroupProvided") |
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92 | sourceInfo = Resource::getInfo(filename, resourceGroup); |
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93 | |
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94 | // Continue search if not explicitely forbidden |
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95 | if (bSearchOtherPaths && sourceInfo == NULL) |
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96 | { |
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97 | // Call might be relative to the file currently being processed |
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98 | sourceInfo = Resource::getInfo(sourceFileInfo_->path + filename, sourceFileInfo_->group); |
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99 | if (sourceInfo == NULL) |
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100 | { |
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101 | // Maybe find something in the same group but in the root path |
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102 | sourceInfo = Resource::getInfo(filename, sourceFileInfo_->group); |
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103 | } |
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104 | } |
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105 | return sourceInfo; |
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106 | } |
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107 | |
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108 | void LuaState::includeFile(const std::string& filename, const std::string& resourceGroup, bool bSearchOtherPaths) |
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109 | { |
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110 | shared_ptr<ResourceInfo> sourceInfo = this->getFileInfo(filename, resourceGroup, bSearchOtherPaths); |
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111 | if (sourceInfo != NULL) |
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112 | this->includeString(Resource::open(sourceInfo->filename, sourceInfo->group)->getAsString(), sourceInfo); |
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113 | else |
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114 | COUT(2) << "LuaState: Cannot include file '" << filename << "' in resource group '" |
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115 | << (resourceGroup == "NoResourceGroupProvided" ? sourceFileInfo_->group : resourceGroup) << "': group not found." << std::endl; |
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116 | } |
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117 | |
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118 | void LuaState::includeString(const std::string& code, shared_ptr<ResourceInfo> sourceFileInfo) |
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119 | { |
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120 | // Parse string with provided include parser (otherwise don't preparse at all) |
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121 | std::string luaInput; |
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122 | if (includeParseFunction_ != NULL) |
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123 | luaInput = (*includeParseFunction_)(code); |
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124 | else |
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125 | luaInput = code; |
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126 | |
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127 | this->doString(luaInput, sourceFileInfo); |
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128 | } |
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129 | |
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130 | void LuaState::doFile(const std::string& filename, const std::string& resourceGroup, bool bSearchOtherPaths) |
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131 | { |
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132 | shared_ptr<ResourceInfo> sourceInfo = this->getFileInfo(filename, resourceGroup, bSearchOtherPaths); |
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133 | if (sourceInfo != NULL) |
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134 | this->doString(Resource::open(sourceInfo->filename, sourceInfo->group)->getAsString(), sourceInfo); |
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135 | else |
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136 | COUT(2) << "LuaState: Cannot do file '" << filename << "' in resource group '" |
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137 | << (resourceGroup == "NoResourceGroupProvided" ? sourceFileInfo_->group : resourceGroup) << "': group not found." << std::endl; |
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138 | } |
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139 | |
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140 | void LuaState::doString(const std::string& code, shared_ptr<ResourceInfo> sourceFileInfo) |
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141 | { |
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142 | // Save the oold source file info |
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143 | shared_ptr<ResourceInfo> oldSourceFileInfo = sourceFileInfo_; |
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144 | // Only override if sourceFileInfo provides useful information |
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145 | if (sourceFileInfo != NULL) |
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146 | sourceFileInfo_ = sourceFileInfo; |
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147 | |
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148 | int error = 0; |
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149 | #if LUA_VERSION_NUM != 501 |
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150 | LoadS ls; |
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151 | ls.s = code.c_str(); |
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152 | ls.size = code.size(); |
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153 | error = lua_load(luaState_, &orxonox::LuaState::lua_Chunkreader, &ls, code.c_str()); |
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154 | #else |
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155 | error = luaL_loadstring(luaState_, code.c_str()); |
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156 | #endif |
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157 | |
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158 | // execute the chunk |
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159 | if (error == 0) |
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160 | error = lua_pcall(luaState_, 0, 1, 0); |
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161 | if (error != 0) |
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162 | { |
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163 | std::string origin; |
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164 | if (sourceFileInfo != NULL) |
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165 | origin = " originating from " + sourceFileInfo_->filename; |
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166 | COUT(2) << "Error in Lua-script" << origin << ": " << lua_tostring(luaState_, -1) << std::endl; |
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167 | // return value is nil |
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168 | lua_pushnil(luaState_); |
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169 | } |
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170 | // push return value because it will get lost since the return value of this function is void |
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171 | lua_setglobal(luaState_, "LuaStateReturnValue"); |
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172 | |
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173 | // Load the old info again |
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174 | sourceFileInfo_ = oldSourceFileInfo; |
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175 | } |
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176 | |
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177 | void LuaState::luaPrint(const std::string& str) |
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178 | { |
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179 | output_ << str; |
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180 | } |
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181 | |
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182 | void LuaState::luaLog(unsigned int level, const std::string& message) |
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183 | { |
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184 | OutputHandler::getOutStream(level) << message << std::endl; |
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185 | } |
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186 | |
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187 | bool LuaState::fileExists(const std::string& filename, const std::string& resourceGroup, bool bSearchOtherPaths) |
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188 | { |
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189 | shared_ptr<ResourceInfo> info = this->getFileInfo(filename, resourceGroup, bSearchOtherPaths); |
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190 | if (info == NULL) |
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191 | return false; |
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192 | else |
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193 | return true; |
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194 | } |
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195 | |
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196 | #if LUA_VERSION_NUM != 501 |
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197 | const char * LuaState::lua_Chunkreader(lua_State *L, void *data, size_t *size) |
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198 | { |
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199 | LoadS* ls = static_cast<LoadS*>(data); |
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200 | if (ls->size == 0) |
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201 | return NULL; |
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202 | *size = ls->size; |
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203 | ls->size = 0; |
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204 | return ls->s; |
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205 | } |
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206 | #endif |
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207 | |
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208 | /*static*/ bool LuaState::addToluaInterface(int (*function)(lua_State*), const std::string& name) |
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209 | { |
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210 | for (ToluaInterfaceMap::const_iterator it = toluaInterfaces_s.begin(); it != toluaInterfaces_s.end(); ++it) |
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211 | { |
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212 | if (it->first == name || it->second == function) |
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213 | { |
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214 | COUT(2) << "Warning: Trying to add a Tolua interface with the same name or function." << std::endl; |
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215 | return true; |
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216 | } |
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217 | } |
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218 | toluaInterfaces_s[name] = function; |
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219 | |
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220 | // Open interface in all LuaStates |
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221 | for (std::vector<LuaState*>::const_iterator it = instances_s.begin(); it != instances_s.end(); ++it) |
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222 | (*function)((*it)->luaState_); |
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223 | |
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224 | // Return dummy bool |
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225 | return true; |
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226 | } |
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227 | |
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228 | /*static*/ bool LuaState::removeToluaInterface(const std::string& name) |
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229 | { |
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230 | ToluaInterfaceMap::iterator it = toluaInterfaces_s.find(name); |
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231 | if (it == toluaInterfaces_s.end()) |
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232 | { |
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233 | COUT(2) << "Warning: Cannot remove Tolua interface '" << name << "': Not found" << std::endl; |
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234 | return true; |
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235 | } |
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236 | |
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237 | // Close interface in all LuaStates |
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238 | for (std::vector<LuaState*>::const_iterator itState = instances_s.begin(); itState != instances_s.end(); ++itState) |
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239 | { |
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240 | lua_pushnil((*itState)->luaState_); |
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241 | lua_setglobal((*itState)->luaState_, it->first.c_str()); |
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242 | } |
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243 | |
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244 | // Remove entry |
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245 | toluaInterfaces_s.erase(it); |
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246 | |
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247 | // Return dummy bool |
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248 | return true; |
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249 | } |
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250 | |
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251 | /*static*/ void LuaState::openToluaInterfaces(lua_State* state) |
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252 | { |
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253 | for (ToluaInterfaceMap::const_iterator it = toluaInterfaces_s.begin(); it != toluaInterfaces_s.end(); ++it) |
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254 | (*it->second)(state); |
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255 | } |
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256 | |
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257 | /*static*/ void LuaState::closeToluaInterfaces(lua_State* state) |
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258 | { |
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259 | for (ToluaInterfaceMap::const_iterator it = toluaInterfaces_s.begin(); it != toluaInterfaces_s.end(); ++it) |
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260 | { |
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261 | lua_pushnil(state); |
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262 | lua_setglobal(state, it->first.c_str()); |
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263 | } |
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264 | } |
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265 | } |
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