1 | #include "script.h" |
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2 | #include "loading/load_param.h" |
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3 | |
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4 | |
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5 | Script::Script(const TiXmlElement* root) |
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6 | { |
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7 | this->setClassID(CL_SCRIPT, "Script"); |
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8 | |
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9 | returnCount = argumentCount = 0; |
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10 | |
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11 | luaState = lua_open(); |
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12 | |
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13 | luaopen_base(luaState); |
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14 | luaopen_table(luaState); |
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15 | luaopen_io(luaState); |
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16 | luaopen_string(luaState); |
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17 | luaopen_math(luaState); |
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18 | luaopen_debug(luaState); |
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19 | |
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20 | if (root != NULL) |
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21 | this->loadParams(root); |
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22 | |
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23 | } |
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24 | |
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25 | |
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26 | Script::~Script() |
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27 | { |
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28 | lua_setgcthreshold(luaState, 0); // collected garbage |
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29 | lua_close(luaState); |
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30 | } |
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31 | |
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32 | |
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33 | void Script::loadParams(const TiXmlElement* root) |
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34 | { |
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35 | LOAD_PARAM_START_CYCLE(root, objectElement); |
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36 | { |
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37 | LoadParam_CYCLE(objectElement, "object", this, Script, addObject) |
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38 | .describe("The name of an object that is needed by a script"); |
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39 | } |
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40 | LOAD_PARAM_END_CYCLE(objectElement); |
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41 | |
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42 | |
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43 | LoadParam(root, "file", this, Script, loadFileNoRet) |
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44 | .describe("the fileName of the script, that should be loaded into this world") |
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45 | .defaultValues(""); |
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46 | } |
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47 | |
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48 | |
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49 | |
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50 | bool Script::loadFile(const std::string& filename) |
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51 | { |
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52 | |
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53 | if(currentFile.length() != 0) |
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54 | { |
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55 | printf("Could not load %s because an other file is already loaded: %s\n",filename.c_str(), currentFile.c_str()); |
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56 | return false; |
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57 | } |
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58 | |
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59 | int error = luaL_loadfile (luaState, filename.c_str()); |
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60 | |
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61 | if(error == 0) |
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62 | { |
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63 | error = lua_pcall(luaState, 0, 0, 0); |
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64 | |
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65 | if(error == 0) |
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66 | { |
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67 | currentFile = filename; |
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68 | return true; |
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69 | } |
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70 | else |
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71 | { |
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72 | reportError(error); |
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73 | } |
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74 | |
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75 | } |
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76 | else |
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77 | { |
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78 | reportError(error); |
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79 | } |
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80 | |
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81 | return false; |
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82 | } |
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83 | |
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84 | |
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85 | void Script::addObject(const std::string& className, const std::string& objectName) |
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86 | { |
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87 | |
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88 | } |
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89 | |
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90 | |
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91 | |
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92 | |
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93 | bool Script::executeFile() |
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94 | { |
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95 | if(currentFile.length() != 0) |
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96 | { |
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97 | int error = lua_pcall(luaState, 0, 0, 0); |
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98 | if( error == 0) |
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99 | return true; |
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100 | else |
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101 | { |
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102 | reportError(error); |
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103 | return false; |
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104 | } |
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105 | } |
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106 | return false; |
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107 | } |
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108 | |
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109 | bool Script::selectFunction(std::string& functionName, int retCount) |
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110 | { |
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111 | if(returnCount == 0 && currentFunction.length() == 0) //no return values left on the stack and no other function selected |
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112 | { |
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113 | lua_pushlstring(luaState, functionName.c_str(), functionName.size() ); |
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114 | lua_gettable(luaState, LUA_GLOBALSINDEX); |
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115 | |
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116 | if(lua_isfunction( luaState , -1)) |
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117 | { |
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118 | returnCount = retCount; |
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119 | argumentCount = 0; |
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120 | currentFunction = functionName; |
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121 | return true; |
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122 | } |
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123 | else |
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124 | return false; |
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125 | } |
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126 | else |
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127 | 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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128 | return false; |
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129 | } |
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130 | |
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131 | //return number of returned values |
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132 | bool Script::executeFunction() |
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133 | { |
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134 | if(currentFunction.length() != 0 ) |
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135 | { |
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136 | int error = lua_pcall(luaState, argumentCount, returnCount,0); |
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137 | if(error != 0) |
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138 | { |
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139 | reportError(error); |
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140 | return false; |
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141 | } |
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142 | else |
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143 | { |
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144 | currentFunction.assign("");//a function gets unusable after beeing called for the first time |
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145 | argumentCount = 0; |
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146 | return true; |
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147 | } |
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148 | } |
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149 | else |
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150 | printf("Error: no function selected.\n"); |
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151 | } |
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152 | |
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153 | |
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154 | //overload this function to add different types |
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155 | bool Script::pushParam(int param, std::string& toFunction) |
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156 | { |
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157 | if(currentFunction.compare(toFunction) == 0) |
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158 | { |
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159 | lua_pushnumber(luaState, (lua_Number) param); |
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160 | argumentCount++; |
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161 | return true; |
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162 | } |
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163 | else |
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164 | { |
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165 | 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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166 | return false; |
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167 | } |
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168 | |
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169 | } |
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170 | |
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171 | |
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172 | bool Script::pushParam(float param, std::string& toFunction) |
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173 | { |
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174 | if(currentFunction.compare(toFunction) == 0) |
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175 | { |
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176 | lua_pushnumber(luaState,(lua_Number) param); |
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177 | argumentCount++; |
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178 | return true; |
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179 | } |
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180 | else |
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181 | { |
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182 | 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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183 | return false; |
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184 | } |
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185 | |
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186 | } |
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187 | |
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188 | bool Script::pushParam(double param, std::string& toFunction) |
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189 | { |
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190 | if(currentFunction.compare(toFunction) == 0) |
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191 | { |
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192 | lua_pushnumber(luaState,(lua_Number) param); |
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193 | argumentCount++; |
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194 | return true; |
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195 | } |
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196 | else |
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197 | { |
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198 | 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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199 | return false; |
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200 | } |
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201 | |
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202 | } |
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203 | |
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204 | int Script::getReturnedInt() |
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205 | { |
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206 | int returnValue; |
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207 | if(returnCount > 0) |
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208 | { |
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209 | if(lua_isnumber(luaState, -1)) |
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210 | { |
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211 | returnValue = (int)lua_tonumber(luaState, -1); |
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212 | returnCount--; |
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213 | lua_pop(luaState,1); |
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214 | } |
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215 | } |
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216 | return returnValue; |
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217 | } |
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218 | |
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219 | |
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220 | bool Script::getReturnedBool() |
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221 | { |
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222 | bool returnValue; |
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223 | if(returnCount > 0) |
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224 | { |
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225 | if(lua_isboolean(luaState, -1)) |
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226 | { |
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227 | returnValue = (bool)lua_toboolean(luaState, -1); |
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228 | returnCount--; |
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229 | lua_pop(luaState,1); |
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230 | } |
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231 | } |
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232 | return returnValue; |
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233 | } |
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234 | |
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235 | float Script::getReturnedFloat() |
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236 | { |
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237 | float returnValue; |
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238 | if(returnCount > 0) |
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239 | { |
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240 | if(lua_isnumber(luaState, -1)) |
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241 | { |
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242 | returnValue = (float)lua_tonumber(luaState, -1); |
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243 | returnCount--; |
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244 | lua_pop(luaState,1); |
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245 | } |
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246 | } |
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247 | return returnValue; |
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248 | } |
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249 | |
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250 | void Script::getReturnedString(std::string& string) |
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251 | { |
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252 | const char* returnValue; |
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253 | if(returnCount > 0) |
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254 | { |
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255 | if(lua_isstring(luaState, -1)) |
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256 | { |
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257 | returnValue = lua_tostring(luaState, -1); |
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258 | returnCount--; |
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259 | lua_pop(luaState,1); |
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260 | } |
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261 | } |
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262 | string.assign(returnValue); |
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263 | } |
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264 | |
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265 | int Script::reportError(int error) |
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266 | { |
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267 | if(error != 0) |
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268 | { |
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269 | const char *msg = lua_tostring(luaState, -1); |
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270 | if (msg == NULL) msg = "(error with no message)"; |
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271 | fprintf(stderr, "ERROR: %s\n", msg); |
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272 | lua_pop(luaState, 1); |
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273 | return error; |
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274 | } |
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275 | } |
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276 | |
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