Mercurial Hosting > luan
annotate src/luan/modules/BasicLuan.java @ 1389:eb8b35dccd99
cleanup and stringify change
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Tue, 03 Sep 2019 22:54:31 -0600 |
parents | 2024d23ddd64 |
children | 59fd2e8b1b9d |
rev | line source |
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167
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1 package luan.modules; |
2
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3 import java.io.InputStreamReader; |
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4 import java.io.IOException; |
19
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5 import java.lang.reflect.Method; |
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6 import java.util.Iterator; |
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7 import java.util.Map; |
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8 import java.util.List; |
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9 import java.util.ArrayList; |
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10 import java.util.Arrays; |
48
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11 import luan.Luan; |
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12 import luan.LuanTable; |
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13 import luan.LuanFunction; |
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14 import luan.LuanException; |
1335 | 15 import luan.LuanCloner; |
1189 | 16 import luan.modules.parsers.LuanToString; |
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17 |
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18 |
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19 public final class BasicLuan { |
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20 |
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21 public static String type(Object obj) { |
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22 return Luan.type(obj); |
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23 } |
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24 |
1335 | 25 public static LuanFunction load(Luan luan,String text,String sourceName,LuanTable env) |
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26 throws LuanException |
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27 { |
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28 Utils.checkNotNull(text); |
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29 Utils.checkNotNull(sourceName,1); |
1335 | 30 return luan.load(text,sourceName,env); |
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31 } |
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32 |
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33 public static LuanFunction load_file(Luan luan,String fileName) throws LuanException { |
693
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34 if( fileName == null ) { |
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35 fileName = "stdin:"; |
693
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36 } else if( fileName.indexOf(':') == -1 ) { |
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37 fileName = "file:" + fileName; |
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38 } |
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39 String src = PackageLuan.read(luan,fileName); |
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40 if( src == null ) |
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41 return null; |
1335 | 42 return load(luan,src,fileName,null); |
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43 } |
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44 |
1267 | 45 public static LuanFunction pairs(final LuanTable t) throws LuanException { |
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46 Utils.checkNotNull(t); |
1267 | 47 return t.pairs(); |
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48 } |
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49 |
1335 | 50 private static class Ipairs extends LuanFunction { |
51 List<Object> list; | |
52 int i = 0; | |
53 final int size; | |
54 | |
55 Ipairs(LuanTable t) { | |
56 super(true); | |
57 list = t.asList(); | |
58 size = list.size(); | |
59 } | |
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60 |
1335 | 61 @Override public Object[] call(Object[] args) { |
62 if( i >= size ) | |
63 return LuanFunction.NOTHING; | |
64 Object val = list.get(i++); | |
65 return new Object[]{i,val}; | |
66 } | |
67 | |
68 @Override protected void completeClone(LuanFunction dc,LuanCloner cloner) { | |
69 Ipairs clone = (Ipairs)dc; | |
70 clone.list = (List)cloner.clone(list); | |
71 super.completeClone(dc,cloner); | |
72 } | |
73 } | |
74 | |
75 public static LuanFunction ipairs(LuanTable t) throws LuanException { | |
76 Utils.checkNotNull(t); | |
77 return new Ipairs(t); | |
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78 } |
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79 |
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80 public static Object get_metatable(LuanTable table) throws LuanException { |
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81 Utils.checkNotNull(table); |
471
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82 LuanTable metatable = table.getMetatable(); |
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83 if( metatable == null ) |
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84 return null; |
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85 Object obj = metatable.rawGet("__metatable"); |
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86 return obj!=null ? obj : metatable; |
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87 } |
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88 |
1267 | 89 public static void set_metatable(LuanTable table,LuanTable metatable) throws LuanException { |
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90 Utils.checkNotNull(table); |
1267 | 91 if( table.getHandler("__metatable") != null ) |
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92 throw new LuanException("cannot change a protected metatable"); |
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93 table.setMetatable(metatable); |
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94 } |
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95 |
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96 public static boolean raw_equal(Object v1,Object v2) { |
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97 return v1 == v2 || v1 != null && v1.equals(v2); |
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98 } |
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99 |
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100 public static Object raw_get(LuanTable table,Object index) { |
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101 return table.rawGet(index); |
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102 } |
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103 |
1330 | 104 public static void raw_set(LuanTable table,Object index,Object value) throws LuanException { |
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105 table.rawPut(index,value); |
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106 } |
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107 |
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108 public static int raw_len(Object v) throws LuanException { |
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109 if( v instanceof String ) { |
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110 String s = (String)v; |
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111 return s.length(); |
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112 } |
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113 if( v instanceof LuanTable ) { |
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114 LuanTable t = (LuanTable)v; |
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115 return t.rawLength(); |
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116 } |
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117 throw new LuanException( "bad argument #1 to 'raw_len' (table or string expected)" ); |
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118 } |
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119 |
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120 public static String to_string(Object v) throws LuanException { |
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121 return Luan.luanToString(v); |
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122 } |
41
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123 |
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124 public static LuanTable new_error(Luan luan,Object msg) throws LuanException { |
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125 String s = Luan.luanToString(msg); |
1267 | 126 LuanTable tbl = new LuanException(s).table(luan); |
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127 tbl.rawPut( "message", msg ); |
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128 return tbl; |
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129 } |
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130 |
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131 public static int assert_integer(int v) { |
233
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132 return v; |
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133 } |
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134 |
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135 public static long assert_long(long v) { |
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136 return v; |
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137 } |
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138 |
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139 public static double assert_double(double v) { |
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140 return v; |
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141 } |
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142 |
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143 public static float assert_float(float v) { |
1130 | 144 return v; |
145 } | |
146 | |
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147 public static LuanFunction range(final double from,final double to,Double stepV) throws LuanException { |
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148 final double step = stepV==null ? 1.0 : stepV; |
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149 if( step == 0.0 ) |
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150 throw new LuanException("bad argument #3 (step may not be zero)"); |
1335 | 151 return new LuanFunction(false) { |
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152 double v = from; |
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153 |
1335 | 154 @Override public Object call(Object[] args) { |
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155 if( step > 0.0 && v > to || step < 0.0 && v < to ) |
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156 return LuanFunction.NOTHING; |
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157 double rtn = v; |
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158 v += step; |
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159 return rtn; |
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160 } |
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161 }; |
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162 } |
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163 |
1335 | 164 private static class Values extends LuanFunction { |
165 Object[] args; | |
166 int i = 0; | |
167 | |
168 Values(Object[] args) { | |
169 super(true); | |
170 this.args = args; | |
171 } | |
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172 |
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173 @Override public Object[] call(Object[] x) { |
1335 | 174 if( i >= args.length ) |
175 return LuanFunction.NOTHING; | |
176 Object val = args[i++]; | |
177 return new Object[]{i,val}; | |
178 } | |
179 | |
180 @Override protected void completeClone(LuanFunction dc,LuanCloner cloner) { | |
181 Values clone = (Values)dc; | |
182 clone.args = (Object[])cloner.clone(args); | |
183 super.completeClone(dc,cloner); | |
184 } | |
185 } | |
186 | |
187 public static LuanFunction values(final Object... args) throws LuanException { | |
188 return new Values(args); | |
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189 } |
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190 |
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191 private LuanFunction fn(Object obj) { |
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192 return obj instanceof LuanFunction ? (LuanFunction)obj : null; |
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193 } |
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194 |
1335 | 195 public static Object try_(LuanTable blocks,Object... args) throws LuanException { |
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196 Utils.checkNotNull(blocks); |
1267 | 197 Object obj = blocks.get(1); |
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198 if( obj == null ) |
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199 throw new LuanException("missing 'try' value"); |
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200 if( !(obj instanceof LuanFunction) ) |
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201 throw new LuanException("bad 'try' value (function expected, got "+Luan.type(obj)+")"); |
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202 LuanFunction tryFn = (LuanFunction)obj; |
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203 LuanFunction catchFn = null; |
1267 | 204 obj = blocks.get("catch"); |
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205 if( obj != null ) { |
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206 if( !(obj instanceof LuanFunction) ) |
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207 throw new LuanException("bad 'catch' value (function expected, got "+Luan.type(obj)+")"); |
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208 catchFn = (LuanFunction)obj; |
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209 } |
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210 LuanFunction finallyFn = null; |
1267 | 211 obj = blocks.get("finally"); |
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212 if( obj != null ) { |
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213 if( !(obj instanceof LuanFunction) ) |
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214 throw new LuanException("bad 'finally' value (function expected, got "+Luan.type(obj)+")"); |
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215 finallyFn = (LuanFunction)obj; |
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216 } |
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217 try { |
1335 | 218 return tryFn.call(args); |
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219 } catch(LuanException e) { |
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220 if( catchFn == null ) |
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221 throw e; |
1335 | 222 return catchFn.call(e.table(blocks.luan())); |
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223 } finally { |
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224 if( finallyFn != null ) |
1335 | 225 finallyFn.call(); |
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226 } |
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227 } |
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228 |
1335 | 229 public static Object[] pcall(LuanFunction f,Object... args) { |
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230 try { |
1335 | 231 Object[] r = Luan.array(f.call(args)); |
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232 Object[] rtn = new Object[r.length+1]; |
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233 rtn[0] = true; |
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234 for( int i=0; i<r.length; i++ ) { |
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235 rtn[i+1] = r[i]; |
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236 } |
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237 return rtn; |
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238 } catch(LuanException e) { |
1335 | 239 return new Object[]{false,e.table(f.luan())}; |
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240 } |
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241 } |
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242 |
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243 public static String number_type(Number v) throws LuanException { |
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244 Utils.checkNotNull(v); |
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245 return v.getClass().getSimpleName().toLowerCase(); |
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246 } |
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247 |
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248 public static int hash_code(Object obj) throws LuanException { |
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249 if( obj == null ) { |
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250 return 0; |
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251 } else if( obj instanceof byte[] ) { |
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252 return Arrays.hashCode((byte[])obj); |
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253 } else { |
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254 return obj.hashCode(); |
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255 } |
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256 } |
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257 |
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258 public static String stringify(Object obj,LuanTable options) throws LuanException { |
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259 LuanToString lts = new LuanToString(); |
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260 if( options != null ) { |
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261 Map map = options.asMap(); |
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262 Boolean strict = Utils.removeBoolean(map,"strict"); |
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263 if( strict != null ) |
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264 lts.strict = strict; |
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265 Boolean numberTypes = Utils.removeBoolean(map,"number_types"); |
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266 if( numberTypes != null ) |
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267 lts.numberTypes = numberTypes; |
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268 Utils.checkEmpty(map); |
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269 } |
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270 return lts.toString(obj); |
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1330 | 273 private void BasicLuan() {} // never |
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274 } |