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annotate core/src/luan/impl/LuanImpl.java @ 655:e2be71451d04

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compile TableExpr
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 05 Apr 2016 15:28:07 -0600
parents ea7dbd2dfa65
children e064377994b2
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1 package luan.impl;
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2
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3 import java.util.Arrays;
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4 import java.util.List;
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5 import java.util.ArrayList;
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6 import luan.Luan;
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7 import luan.LuanState;
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8 import luan.LuanTable;
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9 import luan.LuanFunction;
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10 import luan.LuanException;
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11
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12
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13 public final class LuanImpl {
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14 private LuanImpl() {} // never
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15
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16
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17 private static List<Expressions> listExpressions = new ArrayList<Expressions>();
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18
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19 static int addExpressions(Expressions exp) {
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20 int i = listExpressions.size();
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21 listExpressions.add(exp);
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22 return i;
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23 }
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24
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25 public static Expressions getExpressions(int i) {
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26 return listExpressions.get(i);
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27 }
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29
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30 private static List<Stmt> listStmt = new ArrayList<Stmt>();
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31
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32 static int addStmt(Stmt stmt) {
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33 int i = listStmt.size();
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34 listStmt.add(stmt);
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35 return i;
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36 }
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37
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38 public static Stmt getStmt(int i) {
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39 return listStmt.get(i);
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40 }
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41
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42
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43 private static List<Settable> listSettable = new ArrayList<Settable>();
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44
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45 static int addSettable(Settable settable) {
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46 int i = listSettable.size();
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47 listSettable.add(settable);
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48 return i;
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49 }
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50
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51 public static Settable getSettable(int i) {
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52 return listSettable.get(i);
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53 }
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54
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55
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56 public static int len(LuanState luan,Object o) throws LuanException {
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57 if( o instanceof String ) {
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58 String s = (String)o;
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59 return s.length();
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60 }
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61 if( o instanceof byte[] ) {
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62 byte[] a = (byte[])o;
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63 return a.length;
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64 }
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65 if( o instanceof LuanTable ) {
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66 LuanTable t = (LuanTable)o;
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67 return t.length(luan);
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68 }
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69 throw new LuanException( "attempt to get length of a " + Luan.type(o) + " value" );
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70 }
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71
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72 public static Object unm(LuanState luan,Object o) throws LuanException {
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73 if( o instanceof Number )
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74 return -((Number)o).doubleValue();
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75 if( o instanceof LuanTable ) {
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76 LuanFunction fn = Luan.getHandlerFunction("__unm",(LuanTable)o);
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77 if( fn != null ) {
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78 return Luan.first(fn.call(luan,new Object[]{o}));
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79 }
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80 }
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81 throw new LuanException("attempt to perform arithmetic on a "+Luan.type(o)+" value");
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82 }
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83
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84 private static Object arithmetic(LuanState luan,String op,Object o1,Object o2) throws LuanException {
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85 LuanFunction fn = Luan.getBinHandler(op,o1,o2);
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86 if( fn != null )
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87 return Luan.first(fn.call(luan,new Object[]{o1,o2}));
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88 String type = !(o1 instanceof Number) ? Luan.type(o1) : Luan.type(o2);
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89 throw new LuanException("attempt to perform arithmetic on a "+type+" value");
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90 }
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91
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92 public static Object pow(LuanState luan,Object o1,Object o2) throws LuanException {
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93 if( o1 instanceof Number && o2 instanceof Number )
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94 return Math.pow( ((Number)o1).doubleValue(), ((Number)o2).doubleValue() );
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95 return arithmetic(luan,"__pow",o1,o2);
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96 }
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97
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98 public static Object mul(LuanState luan,Object o1,Object o2) throws LuanException {
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99 if( o1 instanceof Number && o2 instanceof Number )
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100 return ((Number)o1).doubleValue() * ((Number)o2).doubleValue();
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101 return arithmetic(luan,"__mul",o1,o2);
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102 }
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103
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104 public static Object div(LuanState luan,Object o1,Object o2) throws LuanException {
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105 if( o1 instanceof Number && o2 instanceof Number )
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106 return ((Number)o1).doubleValue() / ((Number)o2).doubleValue();
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107 return arithmetic(luan,"__div",o1,o2);
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108 }
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109
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110 public static Object mod(LuanState luan,Object o1,Object o2) throws LuanException {
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111 if( o1 instanceof Number && o2 instanceof Number ) {
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112 double d1 = ((Number)o1).doubleValue();
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113 double d2 = ((Number)o2).doubleValue();
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114 return d1 - Math.floor(d1/d2)*d2;
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115 }
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116 return arithmetic(luan,"__mod",o1,o2);
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117 }
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118
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119 public static Object add(LuanState luan,Object o1,Object o2) throws LuanException {
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120 if( o1 instanceof Number && o2 instanceof Number )
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121 return ((Number)o1).doubleValue() + ((Number)o2).doubleValue();
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122 return arithmetic(luan,"__add",o1,o2);
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123 }
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124
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125 public static Object sub(LuanState luan,Object o1,Object o2) throws LuanException {
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126 if( o1 instanceof Number && o2 instanceof Number )
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127 return ((Number)o1).doubleValue() - ((Number)o2).doubleValue();
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128 return arithmetic(luan,"__sub",o1,o2);
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129 }
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130
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131 public static Object concat(LuanState luan,Object o1,Object o2) throws LuanException {
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132 LuanFunction fn = Luan.getBinHandler("__concat",o1,o2);
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133 if( fn != null )
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134 return Luan.first(fn.call(luan,new Object[]{o1,o2}));
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135 String s1 = luan.toString(o1);
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136 String s2 = luan.toString(o2);
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137 return s1 + s2;
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138 }
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139
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140 public static boolean eq(LuanState luan,Object o1,Object o2) throws LuanException {
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141 if( o1 == o2 || o1 != null && o1.equals(o2) )
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142 return true;
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143 if( o1 instanceof Number && o2 instanceof Number ) {
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144 Number n1 = (Number)o1;
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145 Number n2 = (Number)o2;
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146 return n1.doubleValue() == n2.doubleValue();
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147 }
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148 if( o1 instanceof byte[] && o2 instanceof byte[] ) {
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149 byte[] b1 = (byte[])o1;
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150 byte[] b2 = (byte[])o2;
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151 return Arrays.equals(b1,b2);
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152 }
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153 if( !(o1 instanceof LuanTable && o2 instanceof LuanTable) )
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154 return false;
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155 LuanTable t1 = (LuanTable)o1;
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156 LuanTable t2 = (LuanTable)o2;
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157 LuanTable mt1 = t1.getMetatable();
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158 LuanTable mt2 = t2.getMetatable();
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159 if( mt1==null || mt2==null )
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160 return false;
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161 Object f = mt1.rawGet("__eq");
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162 if( f == null || !f.equals(mt2.rawGet("__eq")) )
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163 return false;
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164 LuanFunction fn = Luan.checkFunction(f);
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165 return Luan.checkBoolean( Luan.first(fn.call(luan,new Object[]{o1,o2})) );
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166 }
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167
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168 public static boolean le(LuanState luan,Object o1,Object o2) throws LuanException {
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169 if( o1 instanceof Number && o2 instanceof Number ) {
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170 Number n1 = (Number)o1;
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171 Number n2 = (Number)o2;
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172 return n1.doubleValue() <= n2.doubleValue();
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173 }
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174 if( o1 instanceof String && o2 instanceof String ) {
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175 String s1 = (String)o1;
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176 String s2 = (String)o2;
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177 return s1.compareTo(s2) <= 0;
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178 }
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179 LuanFunction fn = Luan.getBinHandler("__le",o1,o2);
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180 if( fn != null )
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181 return Luan.checkBoolean( Luan.first(fn.call(luan,new Object[]{o1,o2})) );
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182 fn = Luan.getBinHandler("__lt",o1,o2);
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183 if( fn != null )
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184 return !Luan.checkBoolean( Luan.first(fn.call(luan,new Object[]{o2,o1})) );
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185 throw new LuanException( "attempt to compare " + Luan.type(o1) + " with " + Luan.type(o2) );
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186 }
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187
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188 public static boolean lt(LuanState luan,Object o1,Object o2) throws LuanException {
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189 return Luan.isLessThan(luan,o1,o2);
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190 }
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191
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192 public static boolean cnd(Object o) throws LuanException {
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193 return !(o == null || Boolean.FALSE.equals(o));
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194 }
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195
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196 public static void nop(Object o) {}
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197
652
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198
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199 public static void set(LuanStateImpl luan,Settable[] vars,Object obj) throws LuanException {
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200 if( obj instanceof Object[] ) {
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201 Object[] vals = (Object[])obj;
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202 for( int i=0; i<vars.length; i++ ) {
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203 Object val = i < vals.length ? vals[i] : null;
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204 vars[i].set(luan,val);
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205 }
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206 } else {
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207 vars[0].set(luan,obj);
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208 for( int i=1; i<vars.length; i++ ) {
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209 vars[i].set(luan,null);
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210 }
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211 }
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212 }
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213
654
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214 public static Object[] concatArgs(Object o1,Object o2) {
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215 if( o1 instanceof Object[] ) {
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216 Object[] a1 = (Object[])o1;
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217 if( o2 instanceof Object[] ) {
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218 Object[] a2 = (Object[])o2;
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219 Object[] rtn = new Object[a1.length+a2.length];
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220 System.arraycopy(a1,0,rtn,0,a1.length);
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221 System.arraycopy(a2,0,rtn,a1.length,a2.length);
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222 return rtn;
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223 } else {
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224 Object[] rtn = new Object[a1.length+1];
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225 System.arraycopy(a1,0,rtn,0,a1.length);
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226 rtn[a1.length] = o2;
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227 return rtn;
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228 }
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229 } else {
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230 if( o2 instanceof Object[] ) {
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231 Object[] a2 = (Object[])o2;
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232 Object[] rtn = new Object[1+a2.length];
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233 rtn[0] = o1;
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234 System.arraycopy(a2,0,rtn,1,a2.length);
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diff changeset
235 return rtn;
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236 } else {
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diff changeset
237 Object[] rtn = new Object[2];
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238 rtn[0] = o1;
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239 rtn[2] = o2;
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240 return rtn;
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241 }
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242 }
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243 }
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244
655
e2be71451d04 compile TableExpr
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245 public static LuanTable table(Object o) {
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246 LuanTable table = new LuanTable();
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247 int i = 0;
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248 for( Object fld : Luan.array(o) ) {
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249 if( fld instanceof TableField ) {
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diff changeset
250 TableField tblFld = (TableField)fld;
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251 Object key = tblFld.key;
e2be71451d04 compile TableExpr
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diff changeset
252 Object value = tblFld.value;
e2be71451d04 compile TableExpr
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253 if( key != null && value != null )
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diff changeset
254 table.rawPut(key,value);
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diff changeset
255 } else {
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diff changeset
256 i++;
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diff changeset
257 if( fld != null )
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diff changeset
258 table.rawPut(i,fld);
e2be71451d04 compile TableExpr
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diff changeset
259 }
e2be71451d04 compile TableExpr
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diff changeset
260 }
e2be71451d04 compile TableExpr
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diff changeset
261 return table;
e2be71451d04 compile TableExpr
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diff changeset
262 }
e2be71451d04 compile TableExpr
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diff changeset
263
648
e387e4021afe start compiler with len operator
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264 }