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annotate core/src/luan/impl/LuanImpl.java @ 664:71f8f5075df8

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compile FnDef
author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 07 Apr 2016 15:11:52 -0600
parents b438a47196bc
children 58ebfec6178b
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rev   line source
648
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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 import luan.modules.JavaLuan;
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12
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13
654
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14 public final class LuanImpl {
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15 private LuanImpl() {} // never
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16
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17
664
71f8f5075df8 compile FnDef
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18 private static List list = new ArrayList();
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19
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20 static int addObj(Object obj) {
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21 int i = list.size();
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22 list.add(obj);
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23 return i;
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24 }
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25
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71f8f5075df8 compile FnDef
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26 public static Object getObj(int i) {
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27 return list.get(i);
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28 }
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29
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30
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31 public static int len(LuanState luan,Object o) throws LuanException {
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32 if( o instanceof String ) {
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33 String s = (String)o;
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34 return s.length();
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35 }
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36 if( o instanceof byte[] ) {
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37 byte[] a = (byte[])o;
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38 return a.length;
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39 }
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40 if( o instanceof LuanTable ) {
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41 LuanTable t = (LuanTable)o;
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42 return t.length(luan);
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43 }
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44 throw new LuanException( "attempt to get length of a " + Luan.type(o) + " value" );
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45 }
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46
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47 public static Object unm(LuanState luan,Object o) throws LuanException {
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48 if( o instanceof Number )
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49 return -((Number)o).doubleValue();
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50 if( o instanceof LuanTable ) {
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51 LuanFunction fn = Luan.getHandlerFunction("__unm",(LuanTable)o);
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52 if( fn != null ) {
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53 return Luan.first(fn.call(luan,new Object[]{o}));
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54 }
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55 }
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56 throw new LuanException("attempt to perform arithmetic on a "+Luan.type(o)+" value");
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57 }
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58
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59 private static Object arithmetic(LuanState luan,String op,Object o1,Object o2) throws LuanException {
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60 LuanFunction fn = Luan.getBinHandler(op,o1,o2);
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61 if( fn != null )
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62 return Luan.first(fn.call(luan,new Object[]{o1,o2}));
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63 String type = !(o1 instanceof Number) ? Luan.type(o1) : Luan.type(o2);
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64 throw new LuanException("attempt to perform arithmetic on a "+type+" value");
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65 }
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66
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67 public static Object pow(LuanState luan,Object o1,Object o2) throws LuanException {
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68 if( o1 instanceof Number && o2 instanceof Number )
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69 return Math.pow( ((Number)o1).doubleValue(), ((Number)o2).doubleValue() );
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70 return arithmetic(luan,"__pow",o1,o2);
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71 }
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72
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73 public static Object mul(LuanState luan,Object o1,Object o2) throws LuanException {
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74 if( o1 instanceof Number && o2 instanceof Number )
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75 return ((Number)o1).doubleValue() * ((Number)o2).doubleValue();
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76 return arithmetic(luan,"__mul",o1,o2);
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77 }
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78
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79 public static Object div(LuanState luan,Object o1,Object o2) throws LuanException {
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80 if( o1 instanceof Number && o2 instanceof Number )
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81 return ((Number)o1).doubleValue() / ((Number)o2).doubleValue();
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82 return arithmetic(luan,"__div",o1,o2);
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83 }
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84
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85 public static Object mod(LuanState luan,Object o1,Object o2) throws LuanException {
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86 if( o1 instanceof Number && o2 instanceof Number ) {
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87 double d1 = ((Number)o1).doubleValue();
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88 double d2 = ((Number)o2).doubleValue();
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89 return d1 - Math.floor(d1/d2)*d2;
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90 }
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91 return arithmetic(luan,"__mod",o1,o2);
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92 }
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93
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94 public static Object add(LuanState luan,Object o1,Object o2) throws LuanException {
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95 if( o1 instanceof Number && o2 instanceof Number )
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96 return ((Number)o1).doubleValue() + ((Number)o2).doubleValue();
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97 return arithmetic(luan,"__add",o1,o2);
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98 }
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99
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100 public static Object sub(LuanState luan,Object o1,Object o2) throws LuanException {
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101 if( o1 instanceof Number && o2 instanceof Number )
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102 return ((Number)o1).doubleValue() - ((Number)o2).doubleValue();
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103 return arithmetic(luan,"__sub",o1,o2);
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104 }
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105
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106 public static Object concat(LuanState luan,Object o1,Object o2) throws LuanException {
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107 LuanFunction fn = Luan.getBinHandler("__concat",o1,o2);
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108 if( fn != null )
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109 return Luan.first(fn.call(luan,new Object[]{o1,o2}));
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110 String s1 = luan.toString(o1);
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111 String s2 = luan.toString(o2);
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112 return s1 + s2;
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113 }
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114
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115 public static boolean eq(LuanState luan,Object o1,Object o2) throws LuanException {
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116 if( o1 == o2 || o1 != null && o1.equals(o2) )
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117 return true;
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118 if( o1 instanceof Number && o2 instanceof Number ) {
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119 Number n1 = (Number)o1;
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120 Number n2 = (Number)o2;
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121 return n1.doubleValue() == n2.doubleValue();
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122 }
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123 if( o1 instanceof byte[] && o2 instanceof byte[] ) {
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124 byte[] b1 = (byte[])o1;
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125 byte[] b2 = (byte[])o2;
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126 return Arrays.equals(b1,b2);
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127 }
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128 if( !(o1 instanceof LuanTable && o2 instanceof LuanTable) )
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129 return false;
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130 LuanTable t1 = (LuanTable)o1;
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131 LuanTable t2 = (LuanTable)o2;
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132 LuanTable mt1 = t1.getMetatable();
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133 LuanTable mt2 = t2.getMetatable();
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134 if( mt1==null || mt2==null )
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135 return false;
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136 Object f = mt1.rawGet("__eq");
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137 if( f == null || !f.equals(mt2.rawGet("__eq")) )
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138 return false;
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139 LuanFunction fn = Luan.checkFunction(f);
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140 return Luan.checkBoolean( Luan.first(fn.call(luan,new Object[]{o1,o2})) );
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141 }
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142
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143 public static boolean le(LuanState luan,Object o1,Object o2) throws LuanException {
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144 if( o1 instanceof Number && o2 instanceof Number ) {
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145 Number n1 = (Number)o1;
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146 Number n2 = (Number)o2;
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147 return n1.doubleValue() <= n2.doubleValue();
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148 }
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149 if( o1 instanceof String && o2 instanceof String ) {
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150 String s1 = (String)o1;
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151 String s2 = (String)o2;
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152 return s1.compareTo(s2) <= 0;
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153 }
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154 LuanFunction fn = Luan.getBinHandler("__le",o1,o2);
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155 if( fn != null )
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156 return Luan.checkBoolean( Luan.first(fn.call(luan,new Object[]{o1,o2})) );
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157 fn = Luan.getBinHandler("__lt",o1,o2);
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158 if( fn != null )
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159 return !Luan.checkBoolean( Luan.first(fn.call(luan,new Object[]{o2,o1})) );
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160 throw new LuanException( "attempt to compare " + Luan.type(o1) + " with " + Luan.type(o2) );
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161 }
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162
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163 public static boolean lt(LuanState luan,Object o1,Object o2) throws LuanException {
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164 return Luan.isLessThan(luan,o1,o2);
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165 }
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166
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167 public static boolean cnd(Object o) throws LuanException {
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168 return !(o == null || Boolean.FALSE.equals(o));
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169 }
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170
651
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171 public static void nop(Object o) {}
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172
652
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173
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174 public static void set(LuanStateImpl luan,Settable[] vars,Object obj) throws LuanException {
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175 if( obj instanceof Object[] ) {
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176 Object[] vals = (Object[])obj;
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177 for( int i=0; i<vars.length; i++ ) {
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178 Object val = i < vals.length ? vals[i] : null;
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179 vars[i].set(luan,val);
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180 }
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181 } else {
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182 vars[0].set(luan,obj);
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183 for( int i=1; i<vars.length; i++ ) {
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184 vars[i].set(luan,null);
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185 }
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186 }
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187 }
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188
660
e064377994b2 compile table put
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189 public static void put(LuanState luan,Object t,Object key,Object value) throws LuanException {
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190 if( t instanceof LuanTable ) {
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191 LuanTable tbl = (LuanTable)t;
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192 tbl.put(luan,key,value);
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193 return;
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194 }
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195 if( t != null && luan.hasJava() )
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196 JavaLuan.__new_index(luan,t,key,value);
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197 else
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198 throw new LuanException( "attempt to index a " + Luan.type(t) + " value" );
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199 }
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200
662
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201 public static Object pick(Object o,int i) {
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202 if( i < 1 )
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203 throw new RuntimeException();
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204 if( !(o instanceof Object[]) )
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205 return null;
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206 Object[] a = (Object[])o;
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207 return i<a.length ? a[i] : null;
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208 }
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209
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210 public static Object[] concatArgs(Object o1,Object o2) {
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211 if( o1 instanceof Object[] ) {
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212 Object[] a1 = (Object[])o1;
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213 if( o2 instanceof Object[] ) {
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214 Object[] a2 = (Object[])o2;
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215 Object[] rtn = new Object[a1.length+a2.length];
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216 System.arraycopy(a1,0,rtn,0,a1.length);
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217 System.arraycopy(a2,0,rtn,a1.length,a2.length);
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218 return rtn;
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219 } else {
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220 Object[] rtn = new Object[a1.length+1];
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221 System.arraycopy(a1,0,rtn,0,a1.length);
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222 rtn[a1.length] = o2;
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223 return rtn;
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224 }
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225 } else {
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226 if( o2 instanceof Object[] ) {
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227 Object[] a2 = (Object[])o2;
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228 Object[] rtn = new Object[1+a2.length];
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229 rtn[0] = o1;
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230 System.arraycopy(a2,0,rtn,1,a2.length);
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231 return rtn;
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232 } else {
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233 Object[] rtn = new Object[2];
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234 rtn[0] = o1;
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235 rtn[2] = o2;
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236 return rtn;
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237 }
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238 }
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239 }
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240
655
e2be71451d04 compile TableExpr
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241 public static LuanTable table(Object o) {
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242 LuanTable table = new LuanTable();
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243 int i = 0;
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244 for( Object fld : Luan.array(o) ) {
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245 if( fld instanceof TableField ) {
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246 TableField tblFld = (TableField)fld;
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247 Object key = tblFld.key;
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248 Object value = tblFld.value;
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249 if( key != null && value != null )
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250 table.rawPut(key,value);
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251 } else {
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252 i++;
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253 if( fld != null )
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diff changeset
254 table.rawPut(i,fld);
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255 }
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diff changeset
256 }
e2be71451d04 compile TableExpr
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diff changeset
257 return table;
e2be71451d04 compile TableExpr
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diff changeset
258 }
e2be71451d04 compile TableExpr
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259
648
e387e4021afe start compiler with len operator
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260 }