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annotate src/luan/lib/BasicLib.java @ 112:f5af13062b10

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fix previous rev git-svn-id: https://luan-java.googlecode.com/svn/trunk@113 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Fri, 23 May 2014 22:52:39 +0000
parents 2428ecfed375
children eacf6ce1b47d
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1 package luan.lib;
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3 import java.io.File;
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4 import java.io.InputStreamReader;
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5 import java.io.IOException;
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6 import java.lang.reflect.Method;
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7 import java.util.Iterator;
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8 import java.util.Map;
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9 import luan.Luan;
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10 import luan.LuanState;
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11 import luan.LuanTable;
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12 import luan.LuanFunction;
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13 import luan.LuanJavaFunction;
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14 import luan.LuanException;
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15 import luan.LuanSource;
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16 import luan.LuanElement;
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17 import luan.interp.LuanCompiler;
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19
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20 public final class BasicLib {
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22 public static final String NAME = "Basic";
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24 public static final LuanFunction LOADER = new LuanFunction() {
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25 @Override public Object call(LuanState luan,Object[] args) {
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26 LuanTable module = new LuanTable();
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27 LuanTable global = luan.global();
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28 try {
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29 global.put( "assert", new LuanJavaFunction(BasicLib.class.getMethod("assert_",LuanState.class,Object.class,String.class),null) );
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30 add( global, "assert_boolean", LuanState.class, Boolean.TYPE );
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31 add( global, "assert_nil", LuanState.class, Object.class );
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32 add( global, "assert_number", LuanState.class, Number.class );
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33 add( global, "assert_string", LuanState.class, String.class );
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34 add( global, "assert_table", LuanState.class, LuanTable.class );
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35 add( global, "do_file", LuanState.class, String.class );
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36 add( global, "error", LuanState.class, Object.class );
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37 add( global, "get_metatable", LuanState.class, Object.class );
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38 add( global, "ipairs", LuanState.class, LuanTable.class );
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39 add( global, "load", LuanState.class, String.class, String.class, Boolean.class );
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40 add( global, "load_file", LuanState.class, String.class );
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41 add( global, "pairs", LuanState.class, LuanTable.class );
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42 add( global, "print", LuanState.class, new Object[0].getClass() );
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43 add( global, "range", LuanState.class, Double.TYPE, Double.TYPE, Double.class );
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44 add( global, "raw_equal", Object.class, Object.class );
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45 add( global, "raw_get", LuanTable.class, Object.class );
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46 add( global, "raw_len", LuanState.class, Object.class );
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47 add( global, "raw_set", LuanTable.class, Object.class, Object.class );
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48 add( global, "repr", LuanState.class, Object.class );
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49 add( global, "set_metatable", LuanTable.class, LuanTable.class );
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50 add( global, "to_number", Object.class, Integer.class );
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51 add( global, "to_string", LuanState.class, Object.class );
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52 add( global, "type", Object.class );
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53 global.put( "_VERSION", Luan.version );
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54 } catch(NoSuchMethodException e) {
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55 throw new RuntimeException(e);
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56 }
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57 return module;
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58 }
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59 };
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61 private static void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
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62 t.put( method, new LuanJavaFunction(BasicLib.class.getMethod(method,parameterTypes),null) );
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63 }
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64
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65 public static void print(LuanState luan,Object... args) throws LuanException {
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66 for( int i=0; i<args.length; i++ ) {
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67 if( i > 0 )
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68 luan.out.print('\t');
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69 luan.out.print( luan.JAVA.toString(args[i]) );
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70 }
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71 luan.out.println();
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72 }
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74 public static String type(Object obj) {
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75 return Luan.type(obj);
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76 }
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78 public static LuanFunction load(LuanState luan,String text,String sourceName,Boolean interactive) throws LuanException {
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79 if( interactive!=null && interactive )
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80 return LuanCompiler.compileInteractive(luan,new LuanSource(sourceName,text));
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81 else
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82 return LuanCompiler.compileModule(luan,new LuanSource(sourceName,text));
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83 }
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86 public static LuanFunction load_file(LuanState luan,String fileName) throws LuanException {
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87 try {
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88 String src = fileName==null ? Utils.readAll(new InputStreamReader(System.in)) : Utils.read(new File(fileName));
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89 return load(luan,src,fileName,false);
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90 } catch(IOException e) {
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91 throw luan.JAVA.exception(e);
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92 }
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93 }
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95 public static Object do_file(LuanState luan,String fileName) throws LuanException {
108
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96 LuanFunction fn = load_file(luan,fileName);
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97 return luan.JAVA.call(fn,null);
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98 }
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99
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100 private static LuanFunction pairs(final Iterator<Map.Entry<Object,Object>> iter) {
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101 return new LuanFunction() {
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102 @Override public Object[] call(LuanState luan,Object[] args) {
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103 if( !iter.hasNext() )
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104 return LuanFunction.EMPTY;
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105 Map.Entry<Object,Object> entry = iter.next();
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106 return new Object[]{entry.getKey(),entry.getValue()};
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107 }
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108 };
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109 }
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110
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111 public static LuanFunction pairs(LuanState luan,LuanTable t) throws LuanException {
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112 Utils.checkNotNull(luan,t,"table");
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113 return pairs( t.iterator() );
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114 }
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115
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116 public static LuanFunction ipairs(LuanState luan,LuanTable t) throws LuanException {
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117 Utils.checkNotNull(luan,t,"table");
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118 return pairs( t.listIterator() );
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119 }
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120
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121 public static LuanTable get_metatable(LuanState luan,Object obj) {
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122 return luan.getMetatable(obj);
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123 }
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124
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125 public static LuanTable set_metatable(LuanTable table,LuanTable metatable) {
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126 table.setMetatable(metatable);
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127 return table;
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128 }
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129
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130 public static boolean raw_equal(Object v1,Object v2) {
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131 return v1 == v2 || v1 != null && v1.equals(v2);
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132 }
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133
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134 public static Object raw_get(LuanTable table,Object index) {
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135 return table.get(index);
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136 }
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137
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138 public static LuanTable raw_set(LuanTable table,Object index,Object value) {
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139 table.put(index,value);
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140 return table;
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141 }
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142
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143 public static int raw_len(LuanState luan,Object v) throws LuanException {
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144 if( v instanceof String ) {
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145 String s = (String)v;
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146 return s.length();
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147 }
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148 if( v instanceof LuanTable ) {
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149 LuanTable t = (LuanTable)v;
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150 return t.length();
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151 }
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152 throw luan.JAVA.exception( "bad argument #1 to 'raw_len' (table or string expected)" );
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153 }
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154
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155 public static Number to_number(Object e,Integer base) {
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156 return Luan.toNumber(e,base);
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157 }
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158
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159 public static String to_string(LuanState luan,Object v) throws LuanException {
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160 return luan.JAVA.toString(v);
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161 }
41
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162
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163 public static void error(LuanState luan,Object msg) throws LuanException {
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164 throw luan.JAVA.exception(msg);
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165 }
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166
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167 public static Object assert_(LuanState luan,Object v,String msg) throws LuanException {
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168 if( Luan.toBoolean(v) )
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169 return v;
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170 if( msg == null )
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171 msg = "assertion failed!";
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172 throw luan.JAVA.exception( msg );
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173 }
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174
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175 public static String assert_string(LuanState luan,String v) throws LuanException {
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176 Utils.checkNotNull(luan,v,"string");
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177 return v;
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178 }
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179
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180 public static Number assert_number(LuanState luan,Number v) throws LuanException {
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181 Utils.checkNotNull(luan,v,"number");
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182 return v;
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183 }
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184
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185 public static LuanTable assert_table(LuanState luan,LuanTable v) throws LuanException {
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186 Utils.checkNotNull(luan,v,"table");
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187 return v;
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188 }
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189
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190 public static boolean assert_boolean(LuanState luan,boolean v) throws LuanException {
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191 return v;
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192 }
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193
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194 public static Object assert_nil(LuanState luan,Object v) throws LuanException {
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195 if( v != null )
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196 throw luan.JAVA.exception("bad argument #1 (nil expected, got "+Luan.type(v)+")");
64
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197 return v;
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198 }
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199
88
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200 public static String repr(LuanState luan,Object v) throws LuanException {
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201 return luan.JAVA.repr(v);
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202 }
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203
109
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204 public static LuanFunction range(LuanState luan,final double from,final double to,Double stepV) throws LuanException {
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205 final double step = stepV==null ? 1.0 : stepV;
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206 if( step == 0.0 )
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207 throw luan.JAVA.exception("bad argument #3 (step may not be zero)");
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208 return new LuanFunction() {
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209 double v = from;
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210
112
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211 @Override public Object call(LuanState luan,Object[] args) {
109
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212 if( step > 0.0 && v > to || step < 0.0 && v < to )
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213 return LuanFunction.EMPTY;
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214 double rtn = v;
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215 v += step;
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216 return rtn;
109
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217 }
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218 };
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219 }
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220
2
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221 }