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annotate src/luan/impl/LuanImpl.java @ 1802:ca98dee04e08 default tip

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add Parsers.json_null
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 21 Apr 2024 21:25:15 -0600
parents 9ef19f5ea973
children
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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.LuanTable;
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8 import luan.LuanFunction;
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9 import luan.LuanException;
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10 import luan.modules.JavaLuan;
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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 public static int len(Luan luan,Object o) throws LuanException {
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17 if( o instanceof String ) {
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18 String s = (String)o;
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19 return s.length();
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20 }
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21 if( o instanceof byte[] ) {
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22 byte[] a = (byte[])o;
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23 return a.length;
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24 }
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25 if( o instanceof LuanTable ) {
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26 LuanTable t = (LuanTable)o;
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27 return t.length(luan);
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28 }
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29 throw new LuanException( "attempt to get length of a " + Luan.type(o) + " value" );
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30 }
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31
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32 public static Object unm(Luan luan,Object o) throws LuanException {
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33 if( o instanceof Number )
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34 return -((Number)o).doubleValue();
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35 if( o instanceof LuanTable ) {
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36 LuanFunction fn = luan.getHandlerFunction("__unm",(LuanTable)o);
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37 if( fn != null ) {
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38 return Luan.first(fn.call(luan,o));
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39 }
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40 }
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41 throw new LuanException("attempt to perform arithmetic on a "+Luan.type(o)+" value");
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42 }
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43
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44 private static Object arithmetic(Luan luan,String op,Object o1,Object o2) throws LuanException {
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45 LuanFunction fn = luan.getBinHandler(op,o1,o2);
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46 if( fn != null )
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47 return Luan.first(fn.call(luan,o1,o2));
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48 String type = !(o1 instanceof Number) ? Luan.type(o1) : Luan.type(o2);
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49 throw new LuanException("attempt to perform arithmetic on a "+type+" value");
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50 }
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51
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52 public static Object pow(Luan luan,Object o1,Object o2) throws LuanException {
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53 if( o1 instanceof Number && o2 instanceof Number )
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54 return Math.pow( ((Number)o1).doubleValue(), ((Number)o2).doubleValue() );
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55 return arithmetic(luan,"__pow",o1,o2);
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56 }
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57
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58 public static Object mul(Luan luan,Object o1,Object o2) throws LuanException {
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59 if( o1 instanceof Number && o2 instanceof Number )
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60 return ((Number)o1).doubleValue() * ((Number)o2).doubleValue();
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61 return arithmetic(luan,"__mul",o1,o2);
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62 }
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63
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64 public static Object div(Luan luan,Object o1,Object o2) throws LuanException {
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65 if( o1 instanceof Number && o2 instanceof Number )
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66 return ((Number)o1).doubleValue() / ((Number)o2).doubleValue();
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67 return arithmetic(luan,"__div",o1,o2);
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68 }
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69
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70 public static Object idiv(Luan luan,Object o1,Object o2) throws LuanException {
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71 if( o1 instanceof Number && o2 instanceof Number ) {
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72 double d1 = ((Number)o1).doubleValue();
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73 double d2 = ((Number)o2).doubleValue();
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74 return Math.floor(d1/d2);
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75 }
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76 return arithmetic(luan,"__idiv",o1,o2);
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77 }
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78
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79 public static Object mod(Luan luan,Object o1,Object o2) throws LuanException {
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80 if( o1 instanceof Number && o2 instanceof Number ) {
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81 double d1 = ((Number)o1).doubleValue();
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82 double d2 = ((Number)o2).doubleValue();
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83 return d1 - Math.floor(d1/d2)*d2;
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84 }
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85 return arithmetic(luan,"__mod",o1,o2);
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86 }
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87
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88 public static Object add(Luan luan,Object o1,Object o2) throws LuanException {
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89 if( o1 instanceof Number && o2 instanceof Number )
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90 return ((Number)o1).doubleValue() + ((Number)o2).doubleValue();
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91 return arithmetic(luan,"__add",o1,o2);
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92 }
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93
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94 public static Object sub(Luan 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,"__sub",o1,o2);
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98 }
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99
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100 public static Object concat(Luan luan,Object o1,Object o2) throws LuanException {
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101 LuanFunction fn = luan.getBinHandler("__concat",o1,o2);
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102 if( fn != null )
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103 return Luan.first(fn.call(luan,o1,o2));
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104 String s1 = luan.luanToString(o1);
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105 String s2 = luan.luanToString(o2);
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106 return s1 + s2;
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107 }
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108
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109 public static boolean eq(Luan luan,Object o1,Object o2) throws LuanException {
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110 if( o1 == o2 || o1 != null && o1.equals(o2) )
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111 return true;
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112 if( o1 instanceof Number && o2 instanceof Number ) {
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113 Number n1 = (Number)o1;
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114 Number n2 = (Number)o2;
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115 return n1.doubleValue() == n2.doubleValue();
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116 }
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117 if( o1 instanceof byte[] && o2 instanceof byte[] ) {
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118 byte[] b1 = (byte[])o1;
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119 byte[] b2 = (byte[])o2;
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120 return Arrays.equals(b1,b2);
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121 }
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122 if( !(o1 instanceof LuanTable && o2 instanceof LuanTable) )
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123 return false;
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124 LuanTable t1 = (LuanTable)o1;
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125 LuanTable t2 = (LuanTable)o2;
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126 LuanTable mt1 = t1.getMetatable();
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127 LuanTable mt2 = t2.getMetatable();
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128 if( mt1==null || mt2==null )
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129 return false;
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130 Object f = mt1.rawGet("__eq");
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131 if( f == null || !f.equals(mt2.rawGet("__eq")) )
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132 return false;
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133 LuanFunction fn = Luan.checkFunction(f);
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134 return Luan.checkBoolean( Luan.first(fn.call(luan,o1,o2)) );
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135 }
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136
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137 public static boolean le(Luan luan,Object o1,Object o2) throws LuanException {
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138 if( o1 instanceof Number && o2 instanceof Number ) {
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139 Number n1 = (Number)o1;
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140 Number n2 = (Number)o2;
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141 return n1.doubleValue() <= n2.doubleValue();
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142 }
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143 if( o1 instanceof String && o2 instanceof String ) {
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144 String s1 = (String)o1;
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145 String s2 = (String)o2;
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146 return s1.compareTo(s2) <= 0;
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147 }
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148 LuanFunction fn = luan.getBinHandler("__le",o1,o2);
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149 if( fn != null )
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150 return Luan.checkBoolean( Luan.first(fn.call(luan,o1,o2)) );
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151 fn = luan.getBinHandler("__lt",o1,o2);
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152 if( fn != null )
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153 return !Luan.checkBoolean( Luan.first(fn.call(luan,o2,o1)) );
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154 throw new LuanException( "attempt to compare " + Luan.type(o1) + " with " + Luan.type(o2) );
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155 }
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156
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157 public static boolean lt(Luan luan,Object o1,Object o2) throws LuanException {
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158 return luan.isLessThan(o1,o2);
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159 }
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160
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161 public static boolean cnd(Object o) throws LuanException {
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162 return !(o == null || Boolean.FALSE.equals(o));
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163 }
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164
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140cc5191b7a start compiling statements
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165 public static void nop(Object o) {}
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166
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25746915a241 merge Luan and LuanState
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167 public static void put(Luan luan,Object t,Object key,Object value) throws LuanException {
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e064377994b2 compile table put
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168 if( t instanceof LuanTable ) {
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169 LuanTable tbl = (LuanTable)t;
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170 tbl.put(luan,key,value);
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171 return;
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172 }
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173 if( t != null && luan.peek().javaOk )
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174 JavaLuan.__new_index(luan,t,key,value);
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175 else
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176 throw new LuanException( "attempt to index a " + Luan.type(t) + " value" );
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177 }
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178
662
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179 public static Object pick(Object o,int i) {
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180 if( i < 1 )
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181 throw new RuntimeException();
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182 if( !(o instanceof Object[]) )
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183 return null;
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184 Object[] a = (Object[])o;
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185 return pick(a,i);
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186 }
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187
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188 public static Object pick(Object[] a,int i) {
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189 return i<a.length ? a[i] : null;
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190 }
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191
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192 public static void noMore(final Object[] a,final int n) throws LuanException {
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193 if( a.length > n ) {
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194 for( int i=n; i<a.length; i++ ) {
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195 if( a[i] != null )
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196 throw new LuanException("too many arguments");
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197 }
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198 }
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199 }
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200
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201 public static Object[] varArgs(Object[] a,int i) {
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58ebfec6178b all luan now compiles
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202 if( i >= a.length )
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203 return LuanFunction.NOTHING;
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204 Object[] rtn = new Object[a.length - i];
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205 System.arraycopy(a,i,rtn,0,rtn.length);
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206 return rtn;
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207 }
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208
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209 public static Object[] concatArgs(Object o1,Object o2) {
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210 if( o1 instanceof Object[] ) {
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211 Object[] a1 = (Object[])o1;
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212 if( o2 instanceof Object[] ) {
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213 Object[] a2 = (Object[])o2;
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214 Object[] rtn = new Object[a1.length+a2.length];
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215 System.arraycopy(a1,0,rtn,0,a1.length);
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216 System.arraycopy(a2,0,rtn,a1.length,a2.length);
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217 return rtn;
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218 } else {
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219 Object[] rtn = new Object[a1.length+1];
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220 System.arraycopy(a1,0,rtn,0,a1.length);
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221 rtn[a1.length] = o2;
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222 return rtn;
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223 }
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224 } else {
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225 if( o2 instanceof Object[] ) {
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226 Object[] a2 = (Object[])o2;
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227 Object[] rtn = new Object[1+a2.length];
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diff changeset
228 rtn[0] = o1;
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229 System.arraycopy(a2,0,rtn,1,a2.length);
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diff changeset
230 return rtn;
ea7dbd2dfa65 compile TemplateStmt
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diff changeset
231 } else {
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diff changeset
232 Object[] rtn = new Object[2];
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diff changeset
233 rtn[0] = o1;
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diff changeset
234 rtn[2] = o2;
ea7dbd2dfa65 compile TemplateStmt
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diff changeset
235 return rtn;
ea7dbd2dfa65 compile TemplateStmt
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diff changeset
236 }
ea7dbd2dfa65 compile TemplateStmt
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diff changeset
237 }
ea7dbd2dfa65 compile TemplateStmt
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diff changeset
238 }
ea7dbd2dfa65 compile TemplateStmt
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diff changeset
239
1562
b89212fd04b5 remove table.luan
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diff changeset
240 public static LuanTable table(Object[] a) throws LuanException {
b89212fd04b5 remove table.luan
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diff changeset
241 LuanTable table = new LuanTable();
655
e2be71451d04 compile TableExpr
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diff changeset
242 int i = 0;
674
2994e46f62b7 some optimization
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diff changeset
243 for( Object fld : a ) {
655
e2be71451d04 compile TableExpr
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diff changeset
244 if( fld instanceof TableField ) {
e2be71451d04 compile TableExpr
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diff changeset
245 TableField tblFld = (TableField)fld;
e2be71451d04 compile TableExpr
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diff changeset
246 Object key = tblFld.key;
e2be71451d04 compile TableExpr
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diff changeset
247 Object value = tblFld.value;
1566
364859d29ff5 handle nil keys
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diff changeset
248 if( table.rawPut(key,value) != null )
364859d29ff5 handle nil keys
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diff changeset
249 throw new LuanException("duplicate key in table constructor: "+key);
655
e2be71451d04 compile TableExpr
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diff changeset
250 } else {
e2be71451d04 compile TableExpr
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diff changeset
251 i++;
1542
d4407e8de707 disallow duplicates in table constructor
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diff changeset
252 if( table.rawPut(i,fld) != null )
d4407e8de707 disallow duplicates in table constructor
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diff changeset
253 throw new LuanException("duplicate key in table constructor: "+i);
655
e2be71451d04 compile TableExpr
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diff changeset
254 }
e2be71451d04 compile TableExpr
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diff changeset
255 }
e2be71451d04 compile TableExpr
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diff changeset
256 return table;
e2be71451d04 compile TableExpr
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diff changeset
257 }
e2be71451d04 compile TableExpr
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diff changeset
258
674
2994e46f62b7 some optimization
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diff changeset
259 public static Object first(Object[] a) {
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diff changeset
260 return a.length==0 ? null : a[0];
2994e46f62b7 some optimization
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diff changeset
261 }
2994e46f62b7 some optimization
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diff changeset
262
684
41f791e4206d bug fixes
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diff changeset
263 public static String strconcat(String... a) {
41f791e4206d bug fixes
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diff changeset
264 StringBuilder sb = new StringBuilder();
41f791e4206d bug fixes
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diff changeset
265 for( String s : a ) {
41f791e4206d bug fixes
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diff changeset
266 sb.append(s);
41f791e4206d bug fixes
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diff changeset
267 }
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diff changeset
268 return sb.toString();
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diff changeset
269 }
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diff changeset
270
1520
d9a5405a3102 try statement
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diff changeset
271 public static void nopTry() throws LuanException {}
d9a5405a3102 try statement
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diff changeset
272
648
e387e4021afe start compiler with len operator
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parents:
diff changeset
273 }