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annotate src/luan/modules/BasicLuan.java @ 1257:e38f5869e9df

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author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 20 Sep 2018 21:04:41 -0600
parents bae51e2d34c9
children 9fa8b8389578
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
167
4c0131c2b650 merge luan/lib into modules
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diff changeset
1 package luan.modules;
2
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3 import java.io.InputStreamReader;
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4 import java.io.IOException;
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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;
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11 import luan.Luan;
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12 import luan.LuanState;
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13 import luan.LuanTable;
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14 import luan.LuanFunction;
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15 import luan.LuanException;
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16 import luan.LuanMethod;
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17 import luan.modules.parsers.LuanToString;
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19
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20 public final class BasicLuan {
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22 public static String type(Object obj) {
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23 return Luan.type(obj);
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24 }
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26 public static LuanFunction load(String text,String sourceName,LuanTable env)
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27 throws LuanException
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28 {
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29 Utils.checkNotNull(text);
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30 Utils.checkNotNull(sourceName,1);
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31 return Luan.load(text,sourceName,env);
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32 }
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33
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34 public static LuanFunction load_file(LuanState luan,String fileName) throws LuanException {
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35 if( fileName == null ) {
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36 fileName = "stdin:";
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37 } else if( fileName.indexOf(':') == -1 ) {
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38 fileName = "file:" + fileName;
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39 }
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40 String src = PackageLuan.read(luan,fileName);
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41 if( src == null )
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42 throw new LuanException("file '"+fileName+"' not found" );
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43 return load(src,fileName,null);
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44 }
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45
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46 public static LuanFunction pairs(final LuanState luan,final LuanTable t) throws LuanException {
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47 Utils.checkNotNull(t);
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48 return t.pairs(luan);
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49 }
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50
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51 public static LuanFunction ipairs(final LuanTable t) throws LuanException {
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52 Utils.checkNotNull(t);
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53 return new LuanFunction() {
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54 List<Object> list = t.asList();
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55 int i = 0;
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56 final int size = list.size();
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58 @Override public Object[] call(LuanState luan,Object[] args) {
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59 if( i >= size )
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60 return LuanFunction.NOTHING;
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61 Object val = list.get(i++);
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62 return new Object[]{i,val};
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63 }
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64 };
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65 }
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66
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67 public static Object get_metatable(LuanTable table) throws LuanException {
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68 Utils.checkNotNull(table);
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69 LuanTable metatable = table.getMetatable();
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70 if( metatable == null )
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71 return null;
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72 Object obj = metatable.rawGet("__metatable");
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73 return obj!=null ? obj : metatable;
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74 }
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75
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76 public static void set_metatable(LuanState luan,LuanTable table,LuanTable metatable) throws LuanException {
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77 Utils.checkNotNull(table);
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78 if( table.getHandler(luan,"__metatable") != null )
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79 throw new LuanException("cannot change a protected metatable");
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80 table.setMetatable(metatable);
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81 }
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82
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83 public static boolean raw_equal(Object v1,Object v2) {
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84 return v1 == v2 || v1 != null && v1.equals(v2);
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85 }
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86
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87 public static Object raw_get(LuanTable table,Object index) {
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88 return table.rawGet(index);
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89 }
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90
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91 public static void raw_set(LuanTable table,Object index,Object value) {
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92 table.rawPut(index,value);
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93 }
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94
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95 public static int raw_len(Object v) throws LuanException {
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96 if( v instanceof String ) {
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97 String s = (String)v;
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98 return s.length();
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99 }
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100 if( v instanceof LuanTable ) {
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101 LuanTable t = (LuanTable)v;
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102 return t.rawLength();
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103 }
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104 throw new LuanException( "bad argument #1 to 'raw_len' (table or string expected)" );
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105 }
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106
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107 public static String to_string(LuanState luan,Object v) throws LuanException {
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108 return luan.toString(v);
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109 }
41
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110
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111 public static LuanTable new_error(LuanState luan,Object msg) throws LuanException {
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112 String s = luan.toString(msg);
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113 LuanTable tbl = new LuanException(s).table();
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114 tbl.rawPut( "message", msg );
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115 return tbl;
41
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116 }
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117
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118 public static int assert_integer(int v) {
233
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119 return v;
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120 }
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121
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122 public static long assert_long(long v) {
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123 return v;
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124 }
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125
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126 public static double assert_double(double v) {
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127 return v;
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128 }
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129
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130 public static float assert_float(float v) {
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131 return v;
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132 }
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133
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134 public static LuanFunction range(final double from,final double to,Double stepV) throws LuanException {
109
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135 final double step = stepV==null ? 1.0 : stepV;
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136 if( step == 0.0 )
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137 throw new LuanException("bad argument #3 (step may not be zero)");
109
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138 return new LuanFunction() {
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139 double v = from;
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140
112
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141 @Override public Object call(LuanState luan,Object[] args) {
109
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142 if( step > 0.0 && v > to || step < 0.0 && v < to )
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143 return LuanFunction.NOTHING;
109
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144 double rtn = v;
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145 v += step;
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146 return rtn;
109
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147 }
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148 };
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149 }
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150
116
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151 public static LuanFunction values(final Object... args) throws LuanException {
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152 return new LuanFunction() {
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153 int i = 0;
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154
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155 @Override public Object call(LuanState luan,Object[] unused) {
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156 if( i >= args.length )
128
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157 return LuanFunction.NOTHING;
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158 return args[i++];
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159 }
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160 };
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161 }
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162
326
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163 private LuanFunction fn(Object obj) {
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164 return obj instanceof LuanFunction ? (LuanFunction)obj : null;
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165 }
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166
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167 public static Object try_(LuanState luan,LuanTable blocks,Object... args) throws LuanException {
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168 Utils.checkNotNull(blocks);
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169 Object obj = blocks.get(luan,1);
326
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170 if( obj == null )
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171 throw new LuanException("missing 'try' value");
326
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172 if( !(obj instanceof LuanFunction) )
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173 throw new LuanException("bad 'try' value (function expected, got "+Luan.type(obj)+")");
326
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174 LuanFunction tryFn = (LuanFunction)obj;
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175 LuanFunction catchFn = null;
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176 obj = blocks.get(luan,"catch");
326
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177 if( obj != null ) {
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178 if( !(obj instanceof LuanFunction) )
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179 throw new LuanException("bad 'catch' value (function expected, got "+Luan.type(obj)+")");
326
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180 catchFn = (LuanFunction)obj;
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181 }
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182 LuanFunction finallyFn = null;
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183 obj = blocks.get(luan,"finally");
326
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184 if( obj != null ) {
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185 if( !(obj instanceof LuanFunction) )
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186 throw new LuanException("bad 'finally' value (function expected, got "+Luan.type(obj)+")");
326
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187 finallyFn = (LuanFunction)obj;
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188 }
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189 try {
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190 return tryFn.call(luan,args);
326
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191 } catch(LuanException e) {
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192 if( catchFn == null )
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193 throw e;
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194 return catchFn.call(luan,new Object[]{e.table()});
326
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195 } finally {
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196 if( finallyFn != null )
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197 finallyFn.call(luan);
326
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198 }
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199 }
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200
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201 @LuanMethod public static Object[] pcall(LuanState luan,LuanFunction f,Object... args) {
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202 try {
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203 Object[] r = Luan.array(f.call(luan,args));
326
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204 Object[] rtn = new Object[r.length+1];
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205 rtn[0] = true;
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206 for( int i=0; i<r.length; i++ ) {
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207 rtn[i+1] = r[i];
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208 }
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209 return rtn;
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diff changeset
210 } catch(LuanException e) {
481
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211 return new Object[]{false,e.table()};
326
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212 }
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213 }
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214
646
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215 public static String number_type(Number v) throws LuanException {
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216 Utils.checkNotNull(v);
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217 return v.getClass().getSimpleName().toLowerCase();
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218 }
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219
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220 public static int hash_code(Object obj) throws LuanException {
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221 if( obj == null ) {
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222 return 0;
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223 } else if( obj instanceof byte[] ) {
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224 return Arrays.hashCode((byte[])obj);
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225 } else {
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226 return obj.hashCode();
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parents: 793
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227 }
2443152dc2f1 add Luan.hash_code() and Table.hash_value()
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parents: 793
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228 }
2443152dc2f1 add Luan.hash_code() and Table.hash_value()
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229
1189
73d754b1889f add stringify
Franklin Schmidt <fschmidt@gmail.com>
parents: 1166
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230 public static String stringify(Object obj,Boolean strict) throws LuanException {
73d754b1889f add stringify
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231 boolean b = strict!=null ? strict : true;
73d754b1889f add stringify
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parents: 1166
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232 return LuanToString.toString(obj,b);
73d754b1889f add stringify
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parents: 1166
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233 }
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parents: 1166
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234
2
4da26b11d12a start interp
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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235 }