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annotate src/luan/lib/BasicLib.java @ 131:15a8e6588f3c

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various fixes git-svn-id: https://luan-java.googlecode.com/svn/trunk@132 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Tue, 10 Jun 2014 04:15:19 +0000
parents 0594c132888b
children 3119326260ea
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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 java.util.List;
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10 import java.util.ArrayList;
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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.LuanJavaFunction;
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16 import luan.LuanException;
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17 import luan.LuanSource;
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18 import luan.LuanElement;
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19 import luan.interp.LuanCompiler;
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22 public final class BasicLib {
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24 public static void load(LuanState luan) throws LuanException {
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25 luan.load("Basic",LOADER);
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26 }
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28 public static final LuanFunction LOADER = new LuanFunction() {
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29 @Override public Object call(LuanState luan,Object[] args) {
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30 LuanTable module = new LuanTable();
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31 LuanTable global = luan.global();
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32 try {
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33 global.put( "assert", new LuanJavaFunction(BasicLib.class.getMethod("assert_",LuanState.class,Object.class,String.class),null) );
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34 add( global, "assert_boolean", LuanState.class, Boolean.TYPE );
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35 add( global, "assert_nil", LuanState.class, Object.class );
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36 add( global, "assert_number", LuanState.class, Number.class );
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37 add( global, "assert_string", LuanState.class, String.class );
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38 add( global, "assert_table", LuanState.class, LuanTable.class );
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39 add( global, "do_file", LuanState.class, String.class );
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40 add( global, "do_java_resource", LuanState.class, String.class );
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41 add( global, "error", LuanState.class, Object.class );
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42 add( global, "get_metatable", LuanState.class, Object.class );
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43 add( global, "ipairs", LuanState.class, LuanTable.class );
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44 add( global, "load", LuanState.class, String.class, String.class, Boolean.class, Boolean.class );
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45 add( global, "load_file", LuanState.class, String.class );
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46 add( global, "load_java_resource", LuanState.class, String.class );
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47 add( global, "pairs", LuanState.class, LuanTable.class );
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48 add( global, "range", LuanState.class, Double.TYPE, Double.TYPE, Double.class );
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49 add( global, "raw_equal", Object.class, Object.class );
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50 add( global, "raw_get", LuanTable.class, Object.class );
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51 add( global, "raw_len", LuanState.class, Object.class );
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52 add( global, "raw_set", LuanTable.class, Object.class, Object.class );
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53 add( global, "repr", LuanState.class, Object.class );
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54 add( global, "set_metatable", LuanTable.class, LuanTable.class );
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55 add( global, "to_number", Object.class, Integer.class );
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56 add( global, "to_string", LuanState.class, Object.class );
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57 add( global, "type", Object.class );
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58 global.put( "_VERSION", Luan.version );
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59 add( module, "values", new Object[0].getClass() );
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60 } catch(NoSuchMethodException e) {
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61 throw new RuntimeException(e);
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62 }
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63 return module;
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64 }
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65 };
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66
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67 private static void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
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68 t.put( method, new LuanJavaFunction(BasicLib.class.getMethod(method,parameterTypes),null) );
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69 }
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70
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71 public static String type(Object obj) {
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72 return Luan.type(obj);
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73 }
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74
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75 public static LuanFunction load(LuanState luan,String text,String sourceName,Boolean useGlobal,Boolean allowExpr)
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76 throws LuanException
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77 {
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78 if( allowExpr==null )
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79 allowExpr = false;
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80 if( useGlobal!=null && useGlobal )
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81 return LuanCompiler.compileGlobal(luan,new LuanSource(sourceName,text),allowExpr);
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82 else
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83 return LuanCompiler.compileModule(luan,new LuanSource(sourceName,text),allowExpr);
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84 }
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85
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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)) : new IoLib.LuanFile(fileName).read_text();
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89 return load(luan,src,fileName,false,false);
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90 } catch(IOException e) {
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91 throw luan.exception(e);
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92 }
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93 }
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94
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95 public static LuanFunction load_java_resource(LuanState luan,String path) throws LuanException {
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96 try {
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97 String src = new IoLib.LuanUrl(IoLib.java_resource_to_url(path)).read_text();
128
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98 return load(luan,src,path,false,false);
116
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99 } catch(IOException e) {
130
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100 throw luan.exception(e);
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101 }
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102 }
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103
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104 public static Object do_file(LuanState luan,String fileName) throws LuanException {
108
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105 LuanFunction fn = load_file(luan,fileName);
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106 return luan.call(fn);
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107 }
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108
116
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109 public static Object do_java_resource(LuanState luan,String path) throws LuanException {
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110 LuanFunction fn = load_java_resource(luan,path);
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111 return luan.call(fn);
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112 }
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113
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114 private static LuanFunction pairs(final Iterator<Map.Entry<Object,Object>> iter) {
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115 return new LuanFunction() {
109
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116 @Override public Object[] call(LuanState luan,Object[] args) {
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117 if( !iter.hasNext() )
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118 return LuanFunction.NOTHING;
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119 Map.Entry<Object,Object> entry = iter.next();
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120 return new Object[]{entry.getKey(),entry.getValue()};
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121 }
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122 };
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123 }
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124
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125 public static LuanFunction pairs(LuanState luan,LuanTable t) throws LuanException {
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126 Utils.checkNotNull(luan,t,"table");
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127 return pairs( t.iterator() );
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128 }
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129
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130 public static LuanFunction ipairs(LuanState luan,LuanTable t) throws LuanException {
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131 Utils.checkNotNull(luan,t,"table");
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132 return pairs( t.listIterator() );
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133 }
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134
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135 public static LuanTable get_metatable(LuanState luan,Object obj) {
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136 return luan.getMetatable(obj);
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137 }
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138
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139 public static LuanTable set_metatable(LuanTable table,LuanTable metatable) {
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140 table.setMetatable(metatable);
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141 return table;
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142 }
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143
39
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144 public static boolean raw_equal(Object v1,Object v2) {
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145 return v1 == v2 || v1 != null && v1.equals(v2);
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146 }
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147
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148 public static Object raw_get(LuanTable table,Object index) {
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149 return table.get(index);
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150 }
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151
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152 public static LuanTable raw_set(LuanTable table,Object index,Object value) {
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153 table.put(index,value);
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154 return table;
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155 }
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156
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157 public static int raw_len(LuanState luan,Object v) throws LuanException {
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158 if( v instanceof String ) {
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159 String s = (String)v;
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160 return s.length();
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161 }
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162 if( v instanceof LuanTable ) {
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163 LuanTable t = (LuanTable)v;
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164 return t.length();
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165 }
130
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166 throw luan.exception( "bad argument #1 to 'raw_len' (table or string expected)" );
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167 }
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168
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169 public static Number to_number(Object e,Integer base) {
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170 return Luan.toNumber(e,base);
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171 }
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172
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173 public static String to_string(LuanState luan,Object v) throws LuanException {
130
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174 return luan.toString(v);
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175 }
41
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176
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177 public static void error(LuanState luan,Object msg) throws LuanException {
130
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178 throw luan.exception(msg);
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179 }
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180
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181 public static Object assert_(LuanState luan,Object v,String msg) throws LuanException {
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182 if( Luan.toBoolean(v) )
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183 return v;
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184 if( msg == null )
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185 msg = "assertion failed!";
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186 throw luan.exception( msg );
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187 }
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188
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189 public static String assert_string(LuanState luan,String v) throws LuanException {
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190 Utils.checkNotNull(luan,v,"string");
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191 return v;
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192 }
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193
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194 public static Number assert_number(LuanState luan,Number v) throws LuanException {
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195 Utils.checkNotNull(luan,v,"number");
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196 return v;
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197 }
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198
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199 public static LuanTable assert_table(LuanState luan,LuanTable v) throws LuanException {
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200 Utils.checkNotNull(luan,v,"table");
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201 return v;
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202 }
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203
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204 public static boolean assert_boolean(LuanState luan,boolean v) throws LuanException {
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205 return v;
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206 }
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207
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208 public static Object assert_nil(LuanState luan,Object v) throws LuanException {
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209 if( v != null )
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210 throw luan.exception("bad argument #1 (nil expected, got "+Luan.type(v)+")");
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211 return v;
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212 }
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213
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214 public static String repr(LuanState luan,Object v) throws LuanException {
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215 return luan.repr(v);
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216 }
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217
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218 public static LuanFunction range(LuanState luan,final double from,final double to,Double stepV) throws LuanException {
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219 final double step = stepV==null ? 1.0 : stepV;
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220 if( step == 0.0 )
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221 throw luan.exception("bad argument #3 (step may not be zero)");
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222 return new LuanFunction() {
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223 double v = from;
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224
112
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225 @Override public Object call(LuanState luan,Object[] args) {
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226 if( step > 0.0 && v > to || step < 0.0 && v < to )
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227 return LuanFunction.NOTHING;
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228 double rtn = v;
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229 v += step;
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230 return rtn;
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231 }
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232 };
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233 }
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234
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235 public static LuanFunction values(final Object... args) throws LuanException {
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236 return new LuanFunction() {
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237 int i = 0;
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238
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239 @Override public Object call(LuanState luan,Object[] unused) {
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240 if( ++i > args.length )
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241 return LuanFunction.NOTHING;
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242 return new Object[]{i,args[i-1]};
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243 }
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244 };
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245 }
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246
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247 }