1 | #include "script.h" |
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2 | #include "script_class.h" |
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3 | #include "luaincl.h" |
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4 | |
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5 | |
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6 | #include "loading/load_param.h" |
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7 | #include "parser/tinyxml/tinyxml.h" |
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8 | |
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9 | #include "class_list.h" |
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10 | |
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11 | Script::Script(const TiXmlElement* root) |
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12 | { |
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13 | this->setClassID(CL_SCRIPT, "Script"); |
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14 | |
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15 | returnCount = argumentCount = 0; |
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16 | |
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17 | luaState = lua_open(); |
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18 | |
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19 | luaopen_base(luaState); |
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20 | luaopen_table(luaState); |
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21 | luaopen_io(luaState); |
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22 | luaopen_string(luaState); |
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23 | luaopen_math(luaState); |
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24 | luaopen_debug(luaState); |
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25 | if (root != NULL) |
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26 | this->loadParams(root); |
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27 | } |
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28 | |
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29 | |
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30 | Script::~Script() |
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31 | { |
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32 | lua_setgcthreshold(luaState, 0); // collected garbage |
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33 | lua_close(luaState); |
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34 | } |
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35 | |
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36 | |
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37 | void Script::loadParams(const TiXmlElement* root) |
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38 | { |
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39 | BaseObject::loadParams(root); |
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40 | |
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41 | LOAD_PARAM_START_CYCLE(root, object); |
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42 | { |
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43 | LoadParam_CYCLE(object, "object", this, Script, addObject) |
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44 | .describe("The name of an object that is needed by a script"); |
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45 | } |
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46 | LOAD_PARAM_END_CYCLE(object); |
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47 | |
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48 | |
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49 | LoadParam(root, "file", this, Script, loadFileNoRet) |
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50 | .describe("the fileName of the script, that should be loaded into this world") |
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51 | .defaultValues(""); |
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52 | } |
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53 | |
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54 | |
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55 | |
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56 | bool Script::loadFile(const std::string& filename) |
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57 | { |
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58 | |
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59 | if(currentFile.length() != 0) |
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60 | { |
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61 | printf("Could not load %s because an other file is already loaded: %s\n",filename.c_str(), currentFile.c_str()); |
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62 | return false; |
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63 | } |
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64 | |
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65 | int error = luaL_loadfile (luaState, filename.c_str()); |
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66 | |
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67 | if(error == 0) |
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68 | { |
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69 | error = lua_pcall(luaState, 0, 0, 0); |
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70 | |
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71 | if(error == 0) |
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72 | { |
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73 | currentFile = filename; |
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74 | return true; |
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75 | } |
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76 | else |
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77 | { |
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78 | printf("ERROR while loading file %s: ",filename.c_str()); |
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79 | reportError(error); |
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80 | } |
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81 | |
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82 | } |
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83 | else |
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84 | { |
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85 | printf("ERROR while loading file %s: ",filename.c_str()); |
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86 | reportError(error); |
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87 | } |
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88 | |
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89 | return false; |
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90 | } |
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91 | |
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92 | |
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93 | void Script::addObject(const std::string& className, const std::string& objectName) |
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94 | { |
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95 | printf("Script: I am about to add %s of class %s\n",objectName.c_str(),className.c_str()); |
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96 | |
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97 | BaseObject* scriptClass = ClassList::getObject(className, CL_SCRIPT_CLASS); |
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98 | WorldObject tmpObj; |
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99 | if (scriptClass != NULL) |
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100 | { |
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101 | tmpObj.type = className; |
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102 | if( !classIsRegistered(className) ) |
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103 | { |
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104 | static_cast<ScriptClass*>(scriptClass)->registerClass(this); |
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105 | } |
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106 | |
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107 | BaseObject* object = ClassList::getObject(objectName, className); |
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108 | if (object != NULL && !objectIsAdded(objectName)) |
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109 | { |
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110 | static_cast<ScriptClass*>(scriptClass)->insertObject(this, object, false); |
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111 | tmpObj.name = objectName; |
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112 | registeredObjects.push_back(tmpObj); |
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113 | } |
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114 | } |
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115 | } |
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116 | |
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117 | |
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118 | |
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119 | |
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120 | bool Script::executeFile() |
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121 | { |
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122 | printf("WARNING: script.executeFile is not implemented yet"); |
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123 | /*if(currentFile.length() != 0) |
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124 | { |
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125 | int error = lua_pcall(luaState, 0, 0, 0); |
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126 | if( error == 0) |
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127 | return true; |
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128 | else |
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129 | { |
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130 | reportError(error); |
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131 | return false; |
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132 | } |
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133 | }*/ |
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134 | return false; |
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135 | } |
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136 | |
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137 | bool Script::selectFunction(std::string& functionName, int retCount) |
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138 | { |
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139 | if(returnCount == 0 && currentFunction.length() == 0) //no return values left on the stack and no other function selected |
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140 | { |
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141 | lua_pushlstring(luaState, functionName.c_str(), functionName.size() ); |
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142 | lua_gettable(luaState, LUA_GLOBALSINDEX); |
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143 | |
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144 | if(lua_isfunction( luaState , -1)) |
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145 | { |
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146 | returnCount = retCount; |
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147 | argumentCount = 0; |
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148 | currentFunction = functionName; |
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149 | return true; |
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150 | } |
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151 | else |
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152 | return false; |
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153 | } |
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154 | else |
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155 | printf("There is an other function active ( %s ) or there are unremoved return values on the stack. Please remove them first.\n",currentFunction.c_str()); |
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156 | return false; |
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157 | } |
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158 | |
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159 | //return number of returned values |
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160 | bool Script::executeFunction() |
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161 | { |
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162 | if(currentFunction.length() != 0 ) |
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163 | { |
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164 | int error = lua_pcall(luaState, argumentCount, returnCount,0); |
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165 | if(error != 0) |
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166 | { |
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167 | printf("ERROR while executing function %s: \n",currentFunction.c_str()); |
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168 | reportError(error); |
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169 | //clean up |
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170 | currentFunction.assign(""); |
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171 | argumentCount = returnCount = 0; |
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172 | return false; |
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173 | } |
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174 | else |
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175 | { |
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176 | currentFunction.assign("");//a function gets unusable after beeing called for the first time |
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177 | argumentCount = 0; |
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178 | return true; |
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179 | } |
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180 | } |
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181 | else |
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182 | printf("Error: no function selected.\n"); |
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183 | |
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184 | return false; |
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185 | } |
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186 | |
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187 | |
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188 | //overload this function to add different types |
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189 | bool Script::pushParam(int param, std::string& toFunction) |
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190 | { |
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191 | if(currentFunction.compare(toFunction) == 0) |
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192 | { |
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193 | lua_pushnumber(luaState, (lua_Number) param); |
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194 | argumentCount++; |
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195 | return true; |
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196 | } |
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197 | else |
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198 | { |
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199 | printf("Couldn't add parameter because the wrong function is selected: %s instead of %s\n", currentFunction.c_str(), toFunction.c_str()); |
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200 | return false; |
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201 | } |
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202 | |
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203 | } |
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204 | |
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205 | |
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206 | bool Script::pushParam(float param, std::string& toFunction) |
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207 | { |
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208 | if(currentFunction.compare(toFunction) == 0) |
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209 | { |
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210 | lua_pushnumber(luaState,(lua_Number) param); |
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211 | argumentCount++; |
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212 | return true; |
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213 | } |
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214 | else |
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215 | { |
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216 | printf("Couldn't add parameter because the wrong function is selected: %s instead of %s\n", currentFunction.c_str(), toFunction.c_str()); |
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217 | return false; |
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218 | } |
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219 | |
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220 | } |
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221 | |
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222 | bool Script::pushParam(double param, std::string& toFunction) |
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223 | { |
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224 | if(currentFunction.compare(toFunction) == 0) |
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225 | { |
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226 | lua_pushnumber(luaState,(lua_Number) param); |
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227 | argumentCount++; |
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228 | return true; |
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229 | } |
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230 | else |
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231 | { |
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232 | printf("Couldn't add parameter because the wrong function is selected: %s instead of %s\n", currentFunction.c_str(), toFunction.c_str()); |
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233 | return false; |
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234 | } |
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235 | |
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236 | } |
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237 | |
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238 | int Script::getReturnedInt() |
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239 | { |
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240 | int returnValue; |
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241 | if(returnCount > 0) |
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242 | { |
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243 | if(lua_isnumber(luaState, -1)) |
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244 | { |
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245 | returnValue = (int)lua_tonumber(luaState, -1); |
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246 | returnCount--; |
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247 | lua_pop(luaState,1); |
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248 | } |
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249 | } |
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250 | return returnValue; |
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251 | } |
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252 | |
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253 | |
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254 | bool Script::getReturnedBool() |
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255 | { |
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256 | bool returnValue; |
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257 | if(returnCount > 0) |
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258 | { |
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259 | if(lua_isboolean(luaState, -1)) |
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260 | { |
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261 | returnValue = (bool)lua_toboolean(luaState, -1); |
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262 | returnCount--; |
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263 | lua_pop(luaState,1); |
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264 | } |
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265 | } |
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266 | return returnValue; |
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267 | } |
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268 | |
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269 | float Script::getReturnedFloat() |
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270 | { |
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271 | float returnValue; |
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272 | if(returnCount > 0) |
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273 | { |
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274 | if(lua_isnumber(luaState, -1)) |
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275 | { |
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276 | returnValue = (float)lua_tonumber(luaState, -1); |
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277 | returnCount--; |
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278 | lua_pop(luaState,1); |
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279 | } |
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280 | } |
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281 | return returnValue; |
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282 | } |
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283 | |
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284 | void Script::getReturnedString(std::string& string) |
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285 | { |
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286 | const char* returnValue; |
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287 | if(returnCount > 0) |
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288 | { |
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289 | if(lua_isstring(luaState, -1)) |
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290 | { |
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291 | returnValue = lua_tostring(luaState, -1); |
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292 | returnCount--; |
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293 | lua_pop(luaState,1); |
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294 | } |
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295 | } |
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296 | string.assign(returnValue); |
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297 | } |
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298 | |
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299 | int Script::reportError(int error) |
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300 | { |
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301 | if(error != 0) |
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302 | { |
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303 | const char *msg = lua_tostring(luaState, -1); |
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304 | if (msg == NULL) msg = "(error with no message)"; |
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305 | fprintf(stderr, "ERROR: %s\n", msg); |
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306 | lua_pop(luaState, 1); |
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307 | } |
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308 | return error; |
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309 | } |
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310 | |
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311 | |
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312 | bool Script::classIsRegistered(const std::string& type) |
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313 | { |
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314 | for(std::list<WorldObject>::const_iterator it = registeredObjects.begin(); it != registeredObjects.end(); it++ ) |
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315 | { |
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316 | if( (*it).type == type) |
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317 | { |
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318 | return true; |
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319 | } |
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320 | } |
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321 | return false; |
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322 | } |
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323 | |
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324 | |
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325 | |
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326 | bool Script::objectIsAdded(const std::string& name) |
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327 | { |
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328 | for(std::list<WorldObject>::const_iterator it = registeredObjects.begin(); it != registeredObjects.end(); it++ ) |
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329 | { |
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330 | if( (*it).name == name) |
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331 | { |
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332 | return true; |
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333 | } |
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334 | } |
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335 | return false; |
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336 | |
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337 | |
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338 | } |
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