Mercurial Hosting > luan
annotate src/luan/lib/BasicLib.java @ 130:0594c132888b
cleanup
git-svn-id: https://luan-java.googlecode.com/svn/trunk@131 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Tue, 10 Jun 2014 02:43:40 +0000 |
parents | f0a4abe58593 |
children | 15a8e6588f3c |
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1 package luan.lib; |
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2 |
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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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20 |
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21 |
37
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22 public final class BasicLib { |
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23 |
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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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27 |
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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, "error", LuanState.class, Object.class ); |
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41 add( global, "get_metatable", LuanState.class, Object.class ); |
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42 add( global, "ipairs", LuanState.class, LuanTable.class ); |
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43 add( global, "load", LuanState.class, String.class, String.class, Boolean.class, Boolean.class ); |
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44 add( global, "load_file", LuanState.class, String.class ); |
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45 add( global, "pairs", LuanState.class, LuanTable.class ); |
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46 add( global, "range", LuanState.class, Double.TYPE, Double.TYPE, Double.class ); |
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47 add( global, "raw_equal", Object.class, Object.class ); |
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48 add( global, "raw_get", LuanTable.class, Object.class ); |
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49 add( global, "raw_len", LuanState.class, Object.class ); |
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50 add( global, "raw_set", LuanTable.class, Object.class, Object.class ); |
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51 add( global, "repr", LuanState.class, Object.class ); |
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52 add( global, "set_metatable", LuanTable.class, LuanTable.class ); |
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53 add( global, "to_number", Object.class, Integer.class ); |
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54 add( global, "to_string", LuanState.class, Object.class ); |
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55 add( global, "type", Object.class ); |
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56 global.put( "_VERSION", Luan.version ); |
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57 add( module, "values", new Object[0].getClass() ); |
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58 } catch(NoSuchMethodException e) { |
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59 throw new RuntimeException(e); |
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60 } |
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61 return module; |
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62 } |
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63 }; |
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64 |
64
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65 private static void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException { |
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66 t.put( method, new LuanJavaFunction(BasicLib.class.getMethod(method,parameterTypes),null) ); |
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67 } |
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68 |
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69 public static String type(Object obj) { |
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70 return Luan.type(obj); |
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71 } |
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72 |
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73 public static LuanFunction load(LuanState luan,String text,String sourceName,Boolean useGlobal,Boolean allowExpr) |
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74 throws LuanException |
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75 { |
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76 if( allowExpr==null ) |
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77 allowExpr = false; |
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78 if( useGlobal!=null && useGlobal ) |
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79 return LuanCompiler.compileGlobal(luan,new LuanSource(sourceName,text),allowExpr); |
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80 else |
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81 return LuanCompiler.compileModule(luan,new LuanSource(sourceName,text),allowExpr); |
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82 } |
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83 |
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84 public static LuanFunction load_file(LuanState luan,String fileName) throws LuanException { |
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85 try { |
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86 String src = fileName==null ? Utils.readAll(new InputStreamReader(System.in)) : new IoLib.LuanFile(fileName).read_text(); |
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87 return load(luan,src,fileName,false,false); |
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88 } catch(IOException e) { |
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89 throw luan.exception(e); |
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90 } |
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91 } |
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92 |
116
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93 public static LuanFunction load_java_resource(LuanState luan,String path) throws LuanException { |
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94 try { |
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95 String src = new IoLib.LuanUrl(IoLib.java_resource_to_url(path)).read_text(); |
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96 return load(luan,src,path,false,false); |
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97 } catch(IOException e) { |
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98 throw luan.exception(e); |
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99 } |
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100 } |
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101 |
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102 public static Object do_file(LuanState luan,String fileName) throws LuanException { |
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103 LuanFunction fn = load_file(luan,fileName); |
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104 return luan.call(fn); |
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105 } |
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106 |
116
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107 public static Object do_java_resource(LuanState luan,String path) throws LuanException { |
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108 LuanFunction fn = load_java_resource(luan,path); |
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109 return luan.call(fn); |
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110 } |
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111 |
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112 private static LuanFunction pairs(final Iterator<Map.Entry<Object,Object>> iter) { |
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113 return new LuanFunction() { |
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114 @Override public Object[] call(LuanState luan,Object[] args) { |
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115 if( !iter.hasNext() ) |
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116 return LuanFunction.NOTHING; |
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117 Map.Entry<Object,Object> entry = iter.next(); |
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118 return new Object[]{entry.getKey(),entry.getValue()}; |
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119 } |
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120 }; |
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121 } |
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122 |
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123 public static LuanFunction pairs(LuanState luan,LuanTable t) throws LuanException { |
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124 Utils.checkNotNull(luan,t,"table"); |
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125 return pairs( t.iterator() ); |
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126 } |
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127 |
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128 public static LuanFunction ipairs(LuanState luan,LuanTable t) throws LuanException { |
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129 Utils.checkNotNull(luan,t,"table"); |
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130 return pairs( t.listIterator() ); |
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131 } |
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132 |
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133 public static LuanTable get_metatable(LuanState luan,Object obj) { |
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134 return luan.getMetatable(obj); |
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135 } |
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136 |
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137 public static LuanTable set_metatable(LuanTable table,LuanTable metatable) { |
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138 table.setMetatable(metatable); |
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139 return table; |
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140 } |
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141 |
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142 public static boolean raw_equal(Object v1,Object v2) { |
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143 return v1 == v2 || v1 != null && v1.equals(v2); |
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144 } |
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145 |
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146 public static Object raw_get(LuanTable table,Object index) { |
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147 return table.get(index); |
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148 } |
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149 |
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150 public static LuanTable raw_set(LuanTable table,Object index,Object value) { |
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151 table.put(index,value); |
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152 return table; |
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153 } |
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154 |
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155 public static int raw_len(LuanState luan,Object v) throws LuanException { |
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156 if( v instanceof String ) { |
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157 String s = (String)v; |
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158 return s.length(); |
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159 } |
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160 if( v instanceof LuanTable ) { |
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161 LuanTable t = (LuanTable)v; |
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162 return t.length(); |
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163 } |
130
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164 throw luan.exception( "bad argument #1 to 'raw_len' (table or string expected)" ); |
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165 } |
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166 |
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167 public static Number to_number(Object e,Integer base) { |
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168 return Luan.toNumber(e,base); |
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169 } |
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170 |
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171 public static String to_string(LuanState luan,Object v) throws LuanException { |
130
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172 return luan.toString(v); |
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173 } |
41
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174 |
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175 public static void error(LuanState luan,Object msg) throws LuanException { |
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176 throw luan.exception(msg); |
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177 } |
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178 |
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179 public static Object assert_(LuanState luan,Object v,String msg) throws LuanException { |
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180 if( Luan.toBoolean(v) ) |
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181 return v; |
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182 if( msg == null ) |
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183 msg = "assertion failed!"; |
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184 throw luan.exception( msg ); |
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185 } |
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186 |
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187 public static String assert_string(LuanState luan,String v) throws LuanException { |
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188 Utils.checkNotNull(luan,v,"string"); |
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189 return v; |
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190 } |
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191 |
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192 public static Number assert_number(LuanState luan,Number v) throws LuanException { |
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193 Utils.checkNotNull(luan,v,"number"); |
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194 return v; |
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195 } |
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196 |
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197 public static LuanTable assert_table(LuanState luan,LuanTable v) throws LuanException { |
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198 Utils.checkNotNull(luan,v,"table"); |
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199 return v; |
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200 } |
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201 |
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202 public static boolean assert_boolean(LuanState luan,boolean v) throws LuanException { |
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203 return v; |
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204 } |
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205 |
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206 public static Object assert_nil(LuanState luan,Object v) throws LuanException { |
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207 if( v != null ) |
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208 throw luan.exception("bad argument #1 (nil expected, got "+Luan.type(v)+")"); |
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209 return v; |
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210 } |
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211 |
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212 public static String repr(LuanState luan,Object v) throws LuanException { |
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213 return luan.repr(v); |
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214 } |
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215 |
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216 public static LuanFunction range(LuanState luan,final double from,final double to,Double stepV) throws LuanException { |
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217 final double step = stepV==null ? 1.0 : stepV; |
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218 if( step == 0.0 ) |
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219 throw luan.exception("bad argument #3 (step may not be zero)"); |
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220 return new LuanFunction() { |
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221 double v = from; |
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222 |
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223 @Override public Object call(LuanState luan,Object[] args) { |
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224 if( step > 0.0 && v > to || step < 0.0 && v < to ) |
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225 return LuanFunction.NOTHING; |
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226 double rtn = v; |
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227 v += step; |
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228 return rtn; |
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229 } |
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230 }; |
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231 } |
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232 |
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233 public static LuanFunction values(final Object... args) throws LuanException { |
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234 return new LuanFunction() { |
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235 int i = 0; |
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236 |
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237 @Override public Object call(LuanState luan,Object[] unused) { |
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238 if( ++i > args.length ) |
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239 return LuanFunction.NOTHING; |
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240 return new Object[]{i,args[i-1]}; |
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241 } |
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242 }; |
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243 } |
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244 |
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245 } |