Mercurial > repos > tabletprog
annotate cbackend.js @ 35:bf5e88f6419d
Use a function/method call strategy that actually works
author | Mike Pavone <pavone@retrodev.com> |
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date | Mon, 09 Jul 2012 21:32:28 -0700 |
parents | a10f1b049193 |
children | a6bf4869fcbe |
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1 var mainModule; |
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2 var modules = {}; |
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3 |
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4 var nextmethodId = 0; |
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5 var methodIds = {}; |
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6 function getMethodId(methodName) |
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7 { |
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8 if (!(methodName in methodIds)) { |
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9 methodIds[methodName] = nextmethodId++; |
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10 |
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11 } |
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12 return methodIds[methodName]; |
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13 } |
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14 |
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15 function importSym(obj, src, key) |
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16 { |
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17 if(!(key in src)) { |
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18 throw new Error(key +' not found in source object for import'); |
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19 } |
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20 if(key in obj) { |
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21 throw new Error(key +' already exists in target object for import') |
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22 } |
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23 obj[key] = src[key]; |
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24 } |
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25 |
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26 function doImport(obj, src, symlist) |
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27 { |
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28 if (symlist === undefined) { |
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29 each(src, function(key,val) { |
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30 if (key != 'parent') { |
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31 importSym(obj, src, key); |
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32 } |
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33 }); |
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34 } else { |
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35 for (var i = 0; i < symlist.length; ++i) { |
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36 importSym(obj, src, symlist[i]); |
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37 } |
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38 } |
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39 return obj; |
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40 } |
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41 |
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42 op.prototype.toC = function(isReceiver) { |
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43 var optoMeth = {'+': 'ADD_', '-': 'SUB_', '*': 'MUL_', '/': 'DIV_', '=': 'EQ_', '!=': 'NEQ_', '<': 'LT_', '>': 'GT_', '>=': 'GEQ_', '<=': 'LEQ_'}; |
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44 var method = optoMeth[this.op]; |
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45 return 'mcall(' + getMethodId(method) + ', 2, ' + this.left.toC() + ', ' + this.right.toC() + ')\n'; |
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46 }; |
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47 |
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48 function escapeCName(name) |
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49 { |
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50 if (name == 'self') { |
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51 return name; |
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52 } |
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53 name = name.replace("_", "UN_").replace(":", "CN_").replace("!", "EX_").replace('?', 'QS_').replace('@', 'AT_'); |
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54 name = 'tp_' + name; |
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55 return name; |
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56 } |
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57 |
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58 symbol.prototype.toC = function() { |
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59 var name = this.cleanName(); |
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60 var info = this.symbols.find(name); |
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61 if (!info) { |
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62 throw new Error('symbol ' + name + ' not found'); |
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63 } |
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64 var pre = ''; |
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65 switch(info.type) { |
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66 case 'self': |
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67 pre = 'self->'; |
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68 break; |
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69 case 'parent': |
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70 pre = 'self->'; |
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71 for (var i = 0; i < info.depth; ++i) { |
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72 pre += 'parent->'; |
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73 } |
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74 break; |
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75 case 'upvar': |
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76 pre = 'env->'; |
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77 for (var i = 1; i < info.depth; ++i) { |
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78 pre += 'parent->'; |
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79 } |
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80 break; |
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81 case 'toplevel': |
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82 pre = 'modules.'; |
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83 modules[name] = false; |
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84 break; |
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85 case 'closedover': |
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86 pre = 'myenv->'; |
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87 } |
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88 return pre + escapeCName(name); |
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89 } |
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90 |
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91 var declaredInts = {}; |
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92 |
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93 intlit.prototype.toC = function() { |
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94 var str = this.val.toString(); |
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95 if (!(this.val in declaredInts)) { |
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96 toplevelcode += 'obj_int32 int32_' + str + ' = {{&obj_int32_meta, NULL}, ' + str + '};\n'; |
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97 declaredInts[this.val] = true; |
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98 } |
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99 return '((object *)&int32_' + str + ')'; |
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100 } |
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101 |
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102 floatlit.prototype.toC = function() { |
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103 return 'make_float(' + this.val.toString() + ')'; |
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104 } |
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105 |
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106 strlit.prototype.toC = function() { |
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107 return 'make_str("' + this.val.replace('\\', '\\\\').replace('"', '\\"').replace('\n', '\\n').replace('\r', '\\r') + '")'; |
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108 } |
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109 |
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110 listlit.prototype.toC = function() { |
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111 var ret = 'make_list('; |
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112 each(this.val, function(idx, el) { |
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113 ret += (idx ? ', ' : '') + el.toC(); |
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114 }); |
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115 return ret + ')'; |
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116 } |
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117 |
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118 funcall.prototype.toC = function() { |
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119 var name = this.name[this.name.length-1] == ':' ? this.name.substr(0, this.name.length-1) : this.name; |
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120 if (name == 'foreign') { |
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121 if ((this.args[0] instanceof lambda) || (this.args[0] instanceof object)) { |
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122 return null; |
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123 } else if(this.args[0] instanceof symbol) { |
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124 return this.args[0].name; |
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125 } else { |
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126 throw new Error("Unexpected AST type for foreign:"); |
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127 } |
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128 } |
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129 var args = this.args.slice(0, this.args.length); |
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130 if (this.receiver) { |
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131 args.splice(0, 0, this.receiver); |
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132 } |
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133 var method = false; |
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134 var funinfo = this.symbols.find(name); |
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135 if (!funinfo || funinfo.def instanceof setter) { |
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136 method = true; |
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137 } else { |
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138 switch(funinfo.type) |
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139 { |
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140 case 'self': |
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141 if (args.length < funinfo.def.args.length || funinfo.def.args[0].name != 'self') { |
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142 args.splice(0, 0, new symbol('self', this.symbols)); |
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143 } else { |
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144 args.splice(0, 1); |
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145 } |
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146 method = true; |
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147 break; |
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148 case 'parent': |
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149 ret = 'self'; |
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150 for (var i = 0; i < funinfo.depth; ++i) { |
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151 ret += '->parent'; |
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152 } |
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153 break; |
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154 } |
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155 } |
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156 for (var i in args) { |
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157 args[i] = ', ' + args[i].toC(); |
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158 } |
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159 var callpart; |
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160 if (method) { |
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161 callpart = 'mcall(' + getMethodId(name); |
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162 } else { |
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163 callpart = 'ccall(' + escapeCName(name); |
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164 } |
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165 return callpart + ', ' + args.length + args.join('') + ')'; |
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166 } |
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167 |
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168 function cObject(name) { |
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169 this.name = name; |
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170 this.slots = {}; |
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171 this.properties = []; |
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172 this.values = []; |
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173 this.slotvars = {}; |
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174 } |
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175 |
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176 cObject.prototype.addMessage = function(msgname, implementation) { |
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177 var methodid = getMethodId(msgname); |
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178 var trunc = methodid & 0xF; |
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179 if (!(trunc in this.slots)) { |
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180 this.slots[trunc] = []; |
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181 } |
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182 this.slots[trunc].push([methodid, implementation, msgname]); |
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183 } |
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184 |
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185 cObject.prototype.addProperty = function(propname, value, type) { |
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186 if (type != undefined) { |
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187 this.properties.push([propname, type]); |
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188 } else { |
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189 var escaped = escapeCName(propname); |
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190 this.addMessage(propname, 'va_end(args); return self->' + escaped + ';'); |
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191 this.addMessageVar(propname + '!', 'setval', 'object *'); |
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192 this.addMessage(propname + '!', 'setval = va_arg(args, object *); va_end(args); self->' + escaped + ' = setval; return (object *)self;'); |
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193 this.properties.push(escaped); |
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194 this.values.push(value); |
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195 } |
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196 } |
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197 |
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198 cObject.prototype.addMessageVar = function(msgname, varname, type) { |
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199 var trunc = getMethodId(msgname) & 0xF; |
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200 if (!(trunc in this.slotvars)) { |
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201 this.slotvars[trunc] = {}; |
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202 } |
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203 this.slotvars[trunc][varname] = type; |
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204 } |
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205 |
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206 cObject.prototype.toEarlyCDef = function() { |
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207 var objdef = 'typedef struct {\n\tobject header;\n'; |
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208 for (var i in this.properties) { |
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209 if (this.properties[i] instanceof Array) { |
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210 objdef += '\t' + this.properties[i][1] + ' ' + this.properties[i][0] + ';\n'; |
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211 } else { |
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212 objdef += '\tobject * ' + this.properties[i] + ';\n' |
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213 } |
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214 } |
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215 objdef += '} ' + this.name + ';\nobj_meta ' + this.name + '_meta;\n'; |
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216 return objdef; |
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217 } |
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218 |
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219 cObject.prototype.toCDef = function() { |
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220 var slotdefs = ''; |
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221 var metadef = 'obj_meta ' + this.name + '_meta = {sizeof(' + this.name +'), {'; |
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222 for (var i = 0; i < 16; i++) { |
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223 if (i) { |
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224 metadef += ', '; |
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225 } |
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226 if (i in this.slots) { |
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227 slotdefs += 'object * ' + this.name + '_slot_' + i + '(uint32_t method_id, uint32_t num_params, object * oself, va_list args) {\n\t' + |
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228 this.name + ' *self = (' + this.name + ' *)oself;\n'; |
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229 for (var varname in this.slotvars[i]) { |
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230 slotdefs += '\t' + this.slotvars[i][varname] + ' ' + varname + ';\n'; |
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231 } |
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232 if (this.slots[i].length == 1) { |
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233 slotdefs += '\tif (method_id == ' + this.slots[i][0][0] + ') { /* ' + this.slots[i][0][2] + '*/\n' + |
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234 '\t\t' + this.slots[i][0][1] + '\n' + |
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235 '\t}\n' + |
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236 '\treturn no_impl(method_id, num_params, (object *)self, args);\n}\n'; |
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237 } else { |
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238 slotdefs += '\tswitch(method_id) {\n'; |
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239 for (j in this.slots[i]) { |
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240 slotdefs += '\t\tcase ' + this.slots[i][j][0] + ': /* ' + this.slots[i][j][2] + '*/\n' + |
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241 '\t\t\t' + this.slots[i][j][1] + '\n'; |
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242 } |
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243 slotdefs += '\t\tdefault:\n' + |
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244 '\treturn no_impl(method_id, num_params, params, args);\n}\n'; |
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245 } |
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246 metadef += this.name + '_slot_' + i; |
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247 } else { |
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248 metadef += 'no_impl'; |
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249 } |
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250 } |
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251 metadef += '}};\n'; |
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252 return slotdefs + metadef; |
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253 } |
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254 |
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255 cObject.prototype.toCInstance = function() { |
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256 return 'make_object(&' + this.name + '_meta, NULL, ' + this.values.length + (this.values.length ? ', ' : '') + this.values.join(', ') + ')'; |
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257 } |
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258 |
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259 var nextobject = 0; |
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260 |
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261 object.prototype.toC = function() { |
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262 var messages = this.messages; |
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263 var values = []; |
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264 var imports = [] |
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265 var me = new cObject('object_' + nextobject++); |
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266 for (var i in messages) { |
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267 if (messages[i] instanceof funcall) { |
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268 if (messages[i].name == 'import:' && messages[i].args.length == 1) { |
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269 imports.push({symbols: false, src: messages[i].args[0]}); |
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270 } else if(messages[i].name == 'import:from:' && messages[i].args.length == 2) { |
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271 var importsyms = []; |
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272 each(messages[i].args[0].val, function(i, el) { |
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273 if (!(el instanceof symbol)) { |
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274 throw new Error('Names in import:from statement must be symbols'); |
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275 } |
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276 importsyms.push(new strlit(el.name)); |
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277 }); |
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278 imports.push({symbols: new listlit(importsyms), src: messages[i].args[1]}); |
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279 } else { |
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280 throw new Error('Only import and import:from calls allowed in object context'); |
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281 } |
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282 } else { |
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283 messages[i].toCObject(me); |
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284 } |
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285 } |
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286 forwarddec += me.toEarlyCDef(); |
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287 toplevelcode += me.toCDef(); |
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288 return me.toCInstance(); |
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289 } |
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290 |
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291 var toplevelcode; |
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292 var forwarddec; |
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293 |
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294 function makeCProg(obj) |
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295 { |
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296 var int32 = new cObject('obj_int32'); |
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297 int32.addProperty('num', null, 'int32_t'); |
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298 int32.addMessageVar('ADD_', 'ret', 'obj_int32 *'); |
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299 int32.addMessageVar('ADD_', 'argb', 'obj_int32 *'); |
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300 int32.addMessage('ADD_', 'argb = va_arg(args, obj_int32 *); ret = (obj_int32 *)make_object(&obj_int32_meta, NULL, 0); ret->num = self->num + argb->num; return ret;'); |
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301 int32.addMessageVar('SUB_', 'ret', 'obj_int32 *'); |
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302 int32.addMessageVar('SUB_', 'argb', 'obj_int32 *'); |
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303 int32.addMessage('SUB_', 'argb = va_arg(args, obj_int32 *); ret = (obj_int32 *)make_object(&obj_int32_meta, NULL, 0); ret->num = self->num - argb->num; return ret;'); |
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304 int32.addMessageVar('LT_', 'argb', 'obj_int32 *'); |
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305 int32.addMessage('LT_', 'argb = va_arg(args, obj_int32 *); if (self->num < argb->num) { return mcall(METHOD_ID_TRUE, 1, main_module); } return mcall(METHOD_ID_FALSE, 1, main_module);'); |
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306 forwarddec = toplevelcode = ''; |
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307 forwarddec += int32.toEarlyCDef(); |
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308 toplevelcode += int32.toCDef(); |
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309 obj.populateSymbols(toplevel); |
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310 var rest = 'object * mainModule() {\n\tmain_module = ' + obj.toC() + ';\n\treturn main_module;\n}\n'; |
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311 return '#include "runtime/proghead.inc"\n' + |
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312 '#define METHOD_ID_MAIN ' + getMethodId('main') + '\n' + |
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313 '#define METHOD_ID_TRUE ' + getMethodId('true') + '\n' + |
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314 '#define METHOD_ID_FALSE ' + getMethodId('false') + '\n' + |
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315 forwarddec + toplevelcode + rest + '#include "runtime/progfoot.inc"\n'; |
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316 } |
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317 |
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318 object.prototype.toCModule = function() { |
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319 return makeCProg(this); |
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320 } |
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321 |
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322 var lambdanum = 0; |
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323 |
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324 lambda.prototype.toC = function() { |
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325 var args = this.args ? this.args.slice(0, this.args.length) : []; |
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326 var exprs = this.expressions; |
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327 var mynum = lambdanum++; |
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328 if (Object.keys(this.symbols.closedover).length) { |
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329 this.symbols.envtype = 'lambda_' + mynum + '_env'; |
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330 } |
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331 if (this.selftype) { |
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332 this.symbols.defineVar('self', this.selftype); |
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333 if (args[0] && args[0].cleanName() == 'self') { |
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334 args.splice(0, 1); |
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335 } |
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336 var offset = 1; |
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337 } else { |
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338 var offset = 0; |
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339 } |
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340 for (var i = 0; i < args.length; ++i) { |
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341 var argname = args[i].toC(); |
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342 |
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343 args[i] = (argname.indexOf('->') < 0 ? '\tobject * ' : '\t') + argname + ' = va_arg(args, object *);\n'; |
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344 } |
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345 var compiled = [] |
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346 for (var i in exprs) { |
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347 var js = exprs[i].toC(); |
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348 if (js) { |
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349 compiled.push(indent(js)); |
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350 } |
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351 } |
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352 exprs = compiled; |
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353 if (exprs.length) { |
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354 exprs[exprs.length-1] = 'return ' + exprs[exprs.length-1] + ';'; |
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355 } |
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356 |
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357 if (Object.keys(this.symbols.closedover).length) { |
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358 forwarddec += 'typedef struct {\n'; |
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359 for (var varname in this.symbols.closedover) { |
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360 forwarddec += '\tobject * ' + escapeCName(varname) + ';\n'; |
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361 } |
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362 forwarddec += '} lambda_' + mynum + '_env;\n' |
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363 |
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364 var myenvinit = '\tlambda_' + mynum + '_env * myenv = malloc(sizeof(lambda_' + mynum + '_env));\n'; |
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365 this.symbols.envtype = 'lambda_' + mynum + '_env'; |
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366 } else { |
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367 var myenvinit = ''; |
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368 } |
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369 |
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370 toplevelcode += 'object * lambda_' + mynum + ' (' + this.symbols.parentEnvType() + ' * env, uint32_t num_args, ...) {\n\tva_list args;\n' + myenvinit + '\tva_start(args, num_args);\n'; |
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371 if (this.selftype) { |
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372 var selfvar = (new symbol('self', this.symbols)).toC(); |
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373 if (selfvar == 'self') { |
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374 toplevelcode += '\t' + this.selftype + ' * self = va_arg(args, ' + this.selftype + ' *);\n'; |
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375 } else { |
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376 toplevelcode += '\t' + selfvar + ' = va_arg(args, ' + this.selftype + ' *);\n'; |
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377 } |
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378 |
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379 } |
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380 toplevelcode += args.join('') + '\tva_end(args);\n' + exprs.join(';\n\t') + '\n}\n'; |
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381 |
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382 if (this.symbols.parentEnvType() != 'void') { |
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383 if (this.symbols.passthruenv) { |
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384 var envvar = 'env'; |
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385 } else { |
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386 var envvar = 'myenv'; |
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387 } |
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388 return 'make_closure(' + envvar + ', lambda_' + mynum + ')'; |
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389 } else { |
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390 toplevelcode += 'closure lambda_obj_' + mynum + ' = {{&lambda_meta, NULL}, NULL, lambda_' + mynum + '};\n'; |
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391 return '((object *)&lambda_obj_' + mynum + ')'; |
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392 } |
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393 }; |
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394 lambda.prototype.toCObject = function(typename) { |
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395 this.selftype = typename; |
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396 return this.toC(); |
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397 }; |
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398 lambda.prototype.toCModule = function() { |
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399 return makeCProg(this); |
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400 } |
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401 |
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402 assignment.prototype.toC = function() { |
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403 var existing = this.symbols.find(this.symbol.name); |
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404 var prefix = ''; |
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405 if (!existing) { |
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406 prefix = 'object * '; |
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407 } |
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408 var val = this.expression.toC(); |
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409 if (val === null) { |
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410 return null; |
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411 } |
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412 return prefix + this.symbol.toC() + ' = ' + val; |
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413 }; |
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414 assignment.prototype.toCObject = function(cobj) { |
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415 if (this.expression.toCObject) { |
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416 var val = this.expression.toCObject(cobj.name); |
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417 } else { |
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418 var val = this.expression.toC(); |
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419 } |
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420 if (val === null) { |
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421 return; |
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422 } |
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423 if (this.expression instanceof lambda) { |
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424 var params = ['((object *)self)']; |
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425 var paramget = ''; |
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426 for (var i in this.expression.args) { |
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427 var escaped = escapeCName(this.expression.args[i].cleanName()); |
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428 if (escaped != 'self') { |
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429 cobj.addMessageVar(this.symbol.name, escaped, 'object *'); |
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430 params.push(escaped); |
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431 paramget += escaped + ' = va_arg(args, object *); '; |
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432 } |
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433 } |
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434 cobj.addMessage(this.symbol.name, paramget + 'return ccall(' + val + ', ' + params.length + (params.length ? ', ' : '') + params.join(', ') + ');'); |
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435 } else { |
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436 cobj.addProperty(this.symbol.name, val); |
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437 } |
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438 }; |