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annotate src/luan/impl/LuanImpl.java @ 1330:f41919741100

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fix security
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 11 Feb 2019 01:38:55 -0700
parents 9fa8b8389578
children 25746915a241
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rev   line source
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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
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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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9fa8b8389578 add LuanTable.luan;
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17 public static int len(Object o) throws LuanException {
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18 if( o instanceof String ) {
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19 String s = (String)o;
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20 return s.length();
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21 }
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22 if( o instanceof byte[] ) {
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23 byte[] a = (byte[])o;
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24 return a.length;
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25 }
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26 if( o instanceof LuanTable ) {
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27 LuanTable t = (LuanTable)o;
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28 return t.length();
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29 }
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30 throw new LuanException( "attempt to get length of a " + Luan.type(o) + " value" );
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31 }
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32
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33 public static Object unm(LuanState luan,Object o) throws LuanException {
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34 if( o instanceof Number )
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35 return -((Number)o).doubleValue();
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36 if( o instanceof LuanTable ) {
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37 LuanFunction fn = luan.getHandlerFunction("__unm",(LuanTable)o);
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38 if( fn != null ) {
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39 return Luan.first(fn.call(luan,new Object[]{o}));
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40 }
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41 }
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42 throw new LuanException("attempt to perform arithmetic on a "+Luan.type(o)+" value");
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43 }
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44
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45 private static Object arithmetic(LuanState luan,String op,Object o1,Object o2) throws LuanException {
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46 LuanFunction fn = luan.getBinHandler(op,o1,o2);
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47 if( fn != null )
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48 return Luan.first(fn.call(luan,new Object[]{o1,o2}));
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49 String type = !(o1 instanceof Number) ? Luan.type(o1) : Luan.type(o2);
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50 throw new LuanException("attempt to perform arithmetic on a "+type+" value");
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51 }
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52
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53 public static Object pow(LuanState luan,Object o1,Object o2) throws LuanException {
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54 if( o1 instanceof Number && o2 instanceof Number )
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55 return Math.pow( ((Number)o1).doubleValue(), ((Number)o2).doubleValue() );
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56 return arithmetic(luan,"__pow",o1,o2);
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57 }
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58
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59 public static Object mul(LuanState luan,Object o1,Object o2) throws LuanException {
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60 if( o1 instanceof Number && o2 instanceof Number )
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61 return ((Number)o1).doubleValue() * ((Number)o2).doubleValue();
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62 return arithmetic(luan,"__mul",o1,o2);
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63 }
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64
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65 public static Object div(LuanState luan,Object o1,Object o2) throws LuanException {
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66 if( o1 instanceof Number && o2 instanceof Number )
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67 return ((Number)o1).doubleValue() / ((Number)o2).doubleValue();
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68 return arithmetic(luan,"__div",o1,o2);
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69 }
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70
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71 public static Object mod(LuanState luan,Object o1,Object o2) throws LuanException {
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72 if( o1 instanceof Number && o2 instanceof Number ) {
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73 double d1 = ((Number)o1).doubleValue();
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74 double d2 = ((Number)o2).doubleValue();
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75 return d1 - Math.floor(d1/d2)*d2;
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76 }
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77 return arithmetic(luan,"__mod",o1,o2);
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78 }
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79
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80 public static Object add(LuanState luan,Object o1,Object o2) throws LuanException {
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81 if( o1 instanceof Number && o2 instanceof Number )
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82 return ((Number)o1).doubleValue() + ((Number)o2).doubleValue();
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83 return arithmetic(luan,"__add",o1,o2);
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84 }
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85
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86 public static Object sub(LuanState luan,Object o1,Object o2) throws LuanException {
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87 if( o1 instanceof Number && o2 instanceof Number )
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88 return ((Number)o1).doubleValue() - ((Number)o2).doubleValue();
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89 return arithmetic(luan,"__sub",o1,o2);
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90 }
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91
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92 public static Object concat(LuanState luan,Object o1,Object o2) throws LuanException {
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93 LuanFunction fn = luan.getBinHandler("__concat",o1,o2);
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94 if( fn != null )
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95 return Luan.first(fn.call(luan,new Object[]{o1,o2}));
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96 String s1 = luan.toString(o1);
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97 String s2 = luan.toString(o2);
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98 return s1 + s2;
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99 }
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100
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101 public static boolean eq(LuanState luan,Object o1,Object o2) throws LuanException {
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102 if( o1 == o2 || o1 != null && o1.equals(o2) )
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103 return true;
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104 if( o1 instanceof Number && o2 instanceof Number ) {
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105 Number n1 = (Number)o1;
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106 Number n2 = (Number)o2;
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107 return n1.doubleValue() == n2.doubleValue();
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108 }
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109 if( o1 instanceof byte[] && o2 instanceof byte[] ) {
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110 byte[] b1 = (byte[])o1;
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111 byte[] b2 = (byte[])o2;
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112 return Arrays.equals(b1,b2);
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113 }
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114 if( !(o1 instanceof LuanTable && o2 instanceof LuanTable) )
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115 return false;
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116 LuanTable t1 = (LuanTable)o1;
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117 LuanTable t2 = (LuanTable)o2;
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118 LuanTable mt1 = t1.getMetatable();
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119 LuanTable mt2 = t2.getMetatable();
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120 if( mt1==null || mt2==null )
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121 return false;
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122 Object f = mt1.rawGet("__eq");
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123 if( f == null || !f.equals(mt2.rawGet("__eq")) )
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124 return false;
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125 LuanFunction fn = Luan.checkFunction(f);
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126 return Luan.checkBoolean( Luan.first(fn.call(luan,new Object[]{o1,o2})) );
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127 }
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128
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129 public static boolean le(LuanState luan,Object o1,Object o2) throws LuanException {
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130 if( o1 instanceof Number && o2 instanceof Number ) {
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131 Number n1 = (Number)o1;
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132 Number n2 = (Number)o2;
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133 return n1.doubleValue() <= n2.doubleValue();
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134 }
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135 if( o1 instanceof String && o2 instanceof String ) {
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136 String s1 = (String)o1;
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137 String s2 = (String)o2;
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138 return s1.compareTo(s2) <= 0;
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139 }
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140 LuanFunction fn = luan.getBinHandler("__le",o1,o2);
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141 if( fn != null )
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142 return Luan.checkBoolean( Luan.first(fn.call(luan,new Object[]{o1,o2})) );
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143 fn = luan.getBinHandler("__lt",o1,o2);
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144 if( fn != null )
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145 return !Luan.checkBoolean( Luan.first(fn.call(luan,new Object[]{o2,o1})) );
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146 throw new LuanException( "attempt to compare " + Luan.type(o1) + " with " + Luan.type(o2) );
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147 }
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148
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149 public static boolean lt(LuanState luan,Object o1,Object o2) throws LuanException {
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150 return luan.isLessThan(o1,o2);
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151 }
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152
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153 public static boolean cnd(Object o) throws LuanException {
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154 return !(o == null || Boolean.FALSE.equals(o));
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155 }
d658eab7bf4c finish compiling operators
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156
651
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157 public static void nop(Object o) {}
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158
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159 public static void put(LuanState luan,Object t,Object key,Object value) throws LuanException {
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160 if( t instanceof LuanTable ) {
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161 LuanTable tbl = (LuanTable)t;
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9fa8b8389578 add LuanTable.luan;
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162 tbl.put(key,value);
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163 return;
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164 }
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165 if( t != null && luan.peek().javaOk )
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166 JavaLuan.__new_index(luan,t,key,value);
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167 else
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168 throw new LuanException( "attempt to index a " + Luan.type(t) + " value" );
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169 }
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170
662
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171 public static Object pick(Object o,int i) {
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172 if( i < 1 )
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173 throw new RuntimeException();
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174 if( !(o instanceof Object[]) )
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175 return null;
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176 Object[] a = (Object[])o;
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177 return pick(a,i);
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178 }
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179
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180 public static Object pick(Object[] a,int i) {
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181 return i<a.length ? a[i] : null;
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182 }
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183
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184 public static void noMore(final Object[] a,final int n) throws LuanException {
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185 if( a.length > n ) {
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186 for( int i=n; i<a.length; i++ ) {
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187 if( a[i] != null )
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188 throw new LuanException("too many arguments");
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189 }
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190 }
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191 }
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192
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193 public static Object[] varArgs(Object[] a,int i) {
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194 if( i >= a.length )
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195 return LuanFunction.NOTHING;
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196 Object[] rtn = new Object[a.length - i];
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197 System.arraycopy(a,i,rtn,0,rtn.length);
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198 return rtn;
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199 }
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200
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ea7dbd2dfa65 compile TemplateStmt
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201 public static Object[] concatArgs(Object o1,Object o2) {
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202 if( o1 instanceof Object[] ) {
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203 Object[] a1 = (Object[])o1;
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204 if( o2 instanceof Object[] ) {
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205 Object[] a2 = (Object[])o2;
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206 Object[] rtn = new Object[a1.length+a2.length];
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207 System.arraycopy(a1,0,rtn,0,a1.length);
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208 System.arraycopy(a2,0,rtn,a1.length,a2.length);
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209 return rtn;
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210 } else {
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211 Object[] rtn = new Object[a1.length+1];
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212 System.arraycopy(a1,0,rtn,0,a1.length);
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213 rtn[a1.length] = o2;
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214 return rtn;
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215 }
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216 } else {
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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[1+a2.length];
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220 rtn[0] = o1;
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221 System.arraycopy(a2,0,rtn,1,a2.length);
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222 return rtn;
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223 } else {
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224 Object[] rtn = new Object[2];
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225 rtn[0] = o1;
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226 rtn[2] = o2;
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227 return rtn;
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228 }
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229 }
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230 }
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231
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f41919741100 fix security
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diff changeset
232 public static LuanTable table(LuanState luan,Object[] a) throws LuanException {
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9fa8b8389578 add LuanTable.luan;
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diff changeset
233 LuanTable table = new LuanTable(luan);
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e2be71451d04 compile TableExpr
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diff changeset
234 int i = 0;
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diff changeset
235 for( Object fld : a ) {
655
e2be71451d04 compile TableExpr
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diff changeset
236 if( fld instanceof TableField ) {
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diff changeset
237 TableField tblFld = (TableField)fld;
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diff changeset
238 Object key = tblFld.key;
e2be71451d04 compile TableExpr
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diff changeset
239 Object value = tblFld.value;
e2be71451d04 compile TableExpr
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diff changeset
240 if( key != null && value != null )
e2be71451d04 compile TableExpr
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diff changeset
241 table.rawPut(key,value);
e2be71451d04 compile TableExpr
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diff changeset
242 } else {
e2be71451d04 compile TableExpr
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diff changeset
243 i++;
e2be71451d04 compile TableExpr
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diff changeset
244 if( fld != null )
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diff changeset
245 table.rawPut(i,fld);
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diff changeset
246 }
e2be71451d04 compile TableExpr
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diff changeset
247 }
e2be71451d04 compile TableExpr
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diff changeset
248 return table;
e2be71451d04 compile TableExpr
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diff changeset
249 }
e2be71451d04 compile TableExpr
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250
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2994e46f62b7 some optimization
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diff changeset
251 public static Object first(Object[] a) {
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252 return a.length==0 ? null : a[0];
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253 }
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diff changeset
254
684
41f791e4206d bug fixes
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255 public static String strconcat(String... a) {
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diff changeset
256 StringBuilder sb = new StringBuilder();
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diff changeset
257 for( String s : a ) {
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diff changeset
258 sb.append(s);
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diff changeset
259 }
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diff changeset
260 return sb.toString();
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diff changeset
261 }
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diff changeset
262
648
e387e4021afe start compiler with len operator
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parents:
diff changeset
263 }