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annotate cbackend.js @ 37:a6bf4869fcbe

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Small refactor of built-in int32 type and added support for more operators on said type
author Mike Pavone <pavone@retrodev.com>
date Tue, 10 Jul 2012 22:09:21 -0700
parents bf5e88f6419d
children e7be612fd3ae
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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31
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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, '\t\t' + implementation.lines.join('\n\t\t') + '\n', msgname]);
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183 if (!(trunc in this.slotvars)) {
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184 this.slotvars[trunc] = {};
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185 }
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186 for (var varname in implementation.vars) {
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187 this.slotvars[trunc][varname] = implementation.vars[varname];
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188 }
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189 }
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190
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191 cObject.prototype.addProperty = function(propname, value, type) {
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192 if (type != undefined) {
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193 this.properties.push([propname, type]);
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194 } else {
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195 var escaped = escapeCName(propname);
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196 this.addMessage(propname, {
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197 vars: {},
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198 lines: [
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199 'va_end(args);',
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200 'return self->' + escaped + ';'
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201 ]});
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202 this.addMessage(propname + '!', {
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203 vars: {setval: 'object *'},
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204 lines: [
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205 'setval = va_arg(args, object *);',
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206 'va_end(args);',
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207 'self->' + escaped + ' = setval;',
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208 'return (object *)self;'
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209 ]});
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210 this.properties.push(escaped);
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211 this.values.push(value);
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212 }
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213 }
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214
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215 cObject.prototype.toEarlyCDef = function() {
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216 var objdef = 'typedef struct {\n\tobject header;\n';
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217 for (var i in this.properties) {
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218 if (this.properties[i] instanceof Array) {
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219 objdef += '\t' + this.properties[i][1] + ' ' + this.properties[i][0] + ';\n';
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220 } else {
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221 objdef += '\tobject * ' + this.properties[i] + ';\n'
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222 }
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223 }
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224 objdef += '} ' + this.name + ';\nobj_meta ' + this.name + '_meta;\n';
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225 return objdef;
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226 }
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227
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228 cObject.prototype.toCDef = function() {
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229 var slotdefs = '';
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230 var metadef = 'obj_meta ' + this.name + '_meta = {sizeof(' + this.name +'), {';
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231 for (var i = 0; i < 16; i++) {
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232 if (i) {
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233 metadef += ', ';
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234 }
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235 if (i in this.slots) {
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236 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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237 this.name + ' *self = (' + this.name + ' *)oself;\n';
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238 for (var varname in this.slotvars[i]) {
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239 slotdefs += '\t' + this.slotvars[i][varname] + ' ' + varname + ';\n';
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240 }
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241 if (this.slots[i].length == 1) {
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242 slotdefs += '\tif (method_id == ' + this.slots[i][0][0] + ') { /* ' + this.slots[i][0][2] + '*/\n' +
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243 '\t\t' + this.slots[i][0][1] + '\n' +
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244 '\t}\n' +
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245 '\treturn no_impl(method_id, num_params, (object *)self, args);\n}\n';
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246 } else {
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247 slotdefs += '\tswitch(method_id) {\n';
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248 for (j in this.slots[i]) {
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249 slotdefs += '\t\tcase ' + this.slots[i][j][0] + ': /* ' + this.slots[i][j][2] + '*/\n' +
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250 '\t\t\t' + this.slots[i][j][1] + '\n';
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251 }
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252 slotdefs += '\t\tdefault:\n' +
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253 '\treturn no_impl(method_id, num_params, params, args);\n}\n';
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254 }
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255 metadef += this.name + '_slot_' + i;
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256 } else {
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257 metadef += 'no_impl';
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258 }
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259 }
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260 metadef += '}};\n';
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261 return slotdefs + metadef;
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262 }
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263
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264 cObject.prototype.toCInstance = function() {
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265 return 'make_object(&' + this.name + '_meta, NULL, ' + this.values.length + (this.values.length ? ', ' : '') + this.values.join(', ') + ')';
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266 }
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267
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268 var nextobject = 0;
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269
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270 object.prototype.toC = function() {
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271 var messages = this.messages;
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272 var values = [];
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273 var imports = []
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274 var me = new cObject('object_' + nextobject++);
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275 for (var i in messages) {
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276 if (messages[i] instanceof funcall) {
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277 if (messages[i].name == 'import:' && messages[i].args.length == 1) {
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278 imports.push({symbols: false, src: messages[i].args[0]});
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279 } else if(messages[i].name == 'import:from:' && messages[i].args.length == 2) {
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280 var importsyms = [];
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281 each(messages[i].args[0].val, function(i, el) {
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282 if (!(el instanceof symbol)) {
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283 throw new Error('Names in import:from statement must be symbols');
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284 }
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285 importsyms.push(new strlit(el.name));
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286 });
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287 imports.push({symbols: new listlit(importsyms), src: messages[i].args[1]});
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288 } else {
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289 throw new Error('Only import and import:from calls allowed in object context');
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290 }
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291 } else {
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292 messages[i].toCObject(me);
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293 }
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294 }
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295 forwarddec += me.toEarlyCDef();
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296 toplevelcode += me.toCDef();
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297 return me.toCInstance();
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298 }
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299
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300 var toplevelcode;
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301 var forwarddec;
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302
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303 function addBinaryOp(cobject, opname, cop, objtype)
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304 {
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305 cobject.addMessage(opname, {
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306 vars: {ret: objtype + ' *', argb: objtype +' *'},
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307 lines: [
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308 'argb = va_arg(args, ' + objtype + ' *);',
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309 'ret = (' + objtype + ' *)make_object(&' + objtype + '_meta, NULL, 0);',
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310 'ret->num = self->num ' + cop + ' argb->num;',
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311 'return ret;'
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312 ]
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313 });
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314 }
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315
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316 function addCompOp(cobject, opname, cop, objtype)
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317 {
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318 cobject.addMessage(opname, {
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319 vars: {argb: objtype + ' *'},
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320 lines: [
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321 'argb = va_arg(args, ' + objtype + ' *);',
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322 'if (self->num ' + cop + ' argb->num) {',
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323 ' return mcall(METHOD_ID_TRUE, 1, main_module);',
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324 '}',
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325 'return mcall(METHOD_ID_FALSE, 1, main_module);'
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326 ]
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327 });
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328 }
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329
31
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330 function makeCProg(obj)
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331 {
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332 var int32 = new cObject('obj_int32');
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333 int32.addProperty('num', null, 'int32_t');
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334 addBinaryOp(int32, 'ADD_', '+', 'obj_int32');
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335 addBinaryOp(int32, 'SUB_', '-', 'obj_int32');
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336 addBinaryOp(int32, 'MUL_', '*', 'obj_int32');
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337 addBinaryOp(int32, 'DIV_', '/', 'obj_int32');
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338 addCompOp(int32, 'LT_', '<', 'obj_int32');
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339 addCompOp(int32, 'GT_', '>', 'obj_int32');
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340 addCompOp(int32, 'EQ_', '==', 'obj_int32');
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341 addCompOp(int32, 'NEQ_', '!=', 'obj_int32');
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342 addCompOp(int32, 'GEQ_', '>=', 'obj_int32');
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343 addCompOp(int32, 'LEQ_', '<=', 'obj_int32');
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344 forwarddec = toplevelcode = '';
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345 forwarddec += int32.toEarlyCDef();
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346 toplevelcode += int32.toCDef();
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347 obj.populateSymbols(toplevel);
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348 var rest = 'object * mainModule() {\n\tmain_module = ' + obj.toC() + ';\n\treturn main_module;\n}\n';
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349 return '#include "runtime/proghead.inc"\n' +
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350 '#define METHOD_ID_MAIN ' + getMethodId('main') + '\n' +
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351 '#define METHOD_ID_TRUE ' + getMethodId('true') + '\n' +
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352 '#define METHOD_ID_FALSE ' + getMethodId('false') + '\n' +
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353 forwarddec + toplevelcode + rest + '#include "runtime/progfoot.inc"\n';
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354 }
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355
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356 object.prototype.toCModule = function() {
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357 return makeCProg(this);
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358 }
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359
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360 var lambdanum = 0;
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361
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362 lambda.prototype.toC = function() {
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363 var args = this.args ? this.args.slice(0, this.args.length) : [];
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364 var exprs = this.expressions;
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365 var mynum = lambdanum++;
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366 if (Object.keys(this.symbols.closedover).length) {
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367 this.symbols.envtype = 'lambda_' + mynum + '_env';
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368 }
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369 if (this.selftype) {
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370 this.symbols.defineVar('self', this.selftype);
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371 if (args[0] && args[0].cleanName() == 'self') {
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372 args.splice(0, 1);
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373 }
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374 var offset = 1;
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375 } else {
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376 var offset = 0;
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377 }
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378 for (var i = 0; i < args.length; ++i) {
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379 var argname = args[i].toC();
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380
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381 args[i] = (argname.indexOf('->') < 0 ? '\tobject * ' : '\t') + argname + ' = va_arg(args, object *);\n';
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382 }
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383 var compiled = []
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384 for (var i in exprs) {
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385 var js = exprs[i].toC();
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386 if (js) {
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387 compiled.push(indent(js));
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388 }
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389 }
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390 exprs = compiled;
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391 if (exprs.length) {
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392 exprs[exprs.length-1] = 'return ' + exprs[exprs.length-1] + ';';
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393 }
34
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394
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395 if (Object.keys(this.symbols.closedover).length) {
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396 forwarddec += 'typedef struct {\n';
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397 for (var varname in this.symbols.closedover) {
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diff changeset
398 forwarddec += '\tobject * ' + escapeCName(varname) + ';\n';
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399 }
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diff changeset
400 forwarddec += '} lambda_' + mynum + '_env;\n'
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diff changeset
401
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diff changeset
402 var myenvinit = '\tlambda_' + mynum + '_env * myenv = malloc(sizeof(lambda_' + mynum + '_env));\n';
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403 this.symbols.envtype = 'lambda_' + mynum + '_env';
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404 } else {
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405 var myenvinit = '';
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406 }
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diff changeset
407
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408 toplevelcode += 'object * lambda_' + mynum + ' (' + this.symbols.parentEnvType() + ' * env, uint32_t num_args, ...) {\n\tva_list args;\n' + myenvinit + '\tva_start(args, num_args);\n';
31
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409 if (this.selftype) {
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410 var selfvar = (new symbol('self', this.symbols)).toC();
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411 if (selfvar == 'self') {
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412 toplevelcode += '\t' + this.selftype + ' * self = va_arg(args, ' + this.selftype + ' *);\n';
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413 } else {
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414 toplevelcode += '\t' + selfvar + ' = va_arg(args, ' + this.selftype + ' *);\n';
34
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diff changeset
415 }
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diff changeset
416
31
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417 }
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diff changeset
418 toplevelcode += args.join('') + '\tva_end(args);\n' + exprs.join(';\n\t') + '\n}\n';
34
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diff changeset
419
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diff changeset
420 if (this.symbols.parentEnvType() != 'void') {
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diff changeset
421 if (this.symbols.passthruenv) {
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diff changeset
422 var envvar = 'env';
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diff changeset
423 } else {
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diff changeset
424 var envvar = 'myenv';
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diff changeset
425 }
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diff changeset
426 return 'make_closure(' + envvar + ', lambda_' + mynum + ')';
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diff changeset
427 } else {
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428 toplevelcode += 'closure lambda_obj_' + mynum + ' = {{&lambda_meta, NULL}, NULL, lambda_' + mynum + '};\n';
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429 return '((object *)&lambda_obj_' + mynum + ')';
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diff changeset
430 }
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431 };
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432 lambda.prototype.toCObject = function(typename) {
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433 this.selftype = typename;
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434 return this.toC();
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435 };
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diff changeset
436 lambda.prototype.toCModule = function() {
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diff changeset
437 return makeCProg(this);
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diff changeset
438 }
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439
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440 assignment.prototype.toC = function() {
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441 var existing = this.symbols.find(this.symbol.name);
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442 var prefix = '';
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443 if (!existing) {
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444 prefix = 'object * ';
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445 }
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446 var val = this.expression.toC();
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447 if (val === null) {
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448 return null;
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449 }
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450 return prefix + this.symbol.toC() + ' = ' + val;
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451 };
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452 assignment.prototype.toCObject = function(cobj) {
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453 if (this.expression.toCObject) {
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454 var val = this.expression.toCObject(cobj.name);
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455 } else {
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456 var val = this.expression.toC();
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457 }
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458 if (val === null) {
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459 return;
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460 }
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461 if (this.expression instanceof lambda) {
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462 var params = ['((object *)self)'];
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463 var paramget = '';
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464 var messagevars = {};
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465 for (var i in this.expression.args) {
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466 var escaped = escapeCName(this.expression.args[i].cleanName());
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467 if (escaped != 'self') {
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468 messagevars[escaped] = 'object *';
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469 params.push(escaped);
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470 paramget += escaped + ' = va_arg(args, object *); ';
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471 }
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472 }
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473 cobj.addMessage(this.symbol.name, {
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474 vars: messagevars,
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475 lines: [paramget + 'return ccall(' + val + ', ' + params.length + (params.length ? ', ' : '') + params.join(', ') + ');']
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476 });
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477 } else {
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478 cobj.addProperty(this.symbol.name, val);
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479 }
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480 };