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annotate src/luan/modules/BasicLuan.java @ 1166:7ef40e1923b7

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add back Thread.global allow metatables to have metatables
author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 08 Feb 2018 02:22:51 -0700
parents 1f9d34a6f308
children 73d754b1889f
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;
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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 luan.Luan;
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11 import luan.LuanState;
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12 import luan.LuanTable;
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13 import luan.LuanFunction;
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14 import luan.LuanException;
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15 import luan.LuanMethod;
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17
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ebe9db183eb7 rename *Lib.java to *Luan.java
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18 public final class BasicLuan {
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20 public static String type(Object obj) {
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21 return Luan.type(obj);
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22 }
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24 public static LuanFunction load(String text,String sourceName,LuanTable env)
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25 throws LuanException
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26 {
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27 Utils.checkNotNull(text);
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28 Utils.checkNotNull(sourceName,1);
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29 return Luan.load(text,sourceName,env);
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30 }
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31
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32 public static LuanFunction load_file(LuanState luan,String fileName) throws LuanException {
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33 if( fileName == null ) {
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34 fileName = "stdin:";
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35 } else if( fileName.indexOf(':') == -1 ) {
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36 fileName = "file:" + fileName;
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37 }
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38 String src = PackageLuan.read(luan,fileName);
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39 if( src == null )
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40 throw new LuanException("file '"+fileName+"' not found" );
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41 return load(src,fileName,null);
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42 }
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43
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44 public static LuanFunction pairs(final LuanState luan,final LuanTable t) throws LuanException {
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45 Utils.checkNotNull(t);
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46 return t.pairs(luan);
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47 }
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48
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49 public static LuanFunction ipairs(final LuanTable t) throws LuanException {
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50 Utils.checkNotNull(t);
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51 return new LuanFunction() {
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52 List<Object> list = t.asList();
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53 int i = 0;
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54 final int size = list.size();
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55
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56 @Override public Object[] call(LuanState luan,Object[] args) {
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57 if( i >= size )
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58 return LuanFunction.NOTHING;
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59 Object val = list.get(i++);
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60 return new Object[]{i,val};
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61 }
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62 };
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63 }
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64
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65 public static Object get_metatable(LuanTable table) throws LuanException {
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66 Utils.checkNotNull(table);
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67 LuanTable metatable = table.getMetatable();
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68 if( metatable == null )
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69 return null;
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70 Object obj = metatable.rawGet("__metatable");
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71 return obj!=null ? obj : metatable;
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72 }
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73
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74 public static void set_metatable(LuanState luan,LuanTable table,LuanTable metatable) throws LuanException {
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75 Utils.checkNotNull(table);
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76 if( table.getHandler(luan,"__metatable") != null )
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77 throw new LuanException("cannot change a protected metatable");
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78 table.setMetatable(metatable);
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79 }
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80
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81 public static boolean raw_equal(Object v1,Object v2) {
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82 return v1 == v2 || v1 != null && v1.equals(v2);
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83 }
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84
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85 public static Object raw_get(LuanTable table,Object index) {
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86 return table.rawGet(index);
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87 }
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88
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89 public static void raw_set(LuanTable table,Object index,Object value) {
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90 table.rawPut(index,value);
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91 }
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92
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93 public static int raw_len(Object v) throws LuanException {
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94 if( v instanceof String ) {
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95 String s = (String)v;
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96 return s.length();
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97 }
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98 if( v instanceof LuanTable ) {
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99 LuanTable t = (LuanTable)v;
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100 return t.rawLength();
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101 }
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102 throw new LuanException( "bad argument #1 to 'raw_len' (table or string expected)" );
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103 }
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104
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105 public static String to_string(LuanState luan,Object v) throws LuanException {
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106 return luan.toString(v);
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107 }
41
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108
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109 public static LuanTable new_error(LuanState luan,Object msg) throws LuanException {
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110 String s = luan.toString(msg);
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111 LuanTable tbl = new LuanException(s).table();
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112 tbl.rawPut( "message", msg );
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113 return tbl;
41
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114 }
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115
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116 public static int assert_integer(int v) throws LuanException {
233
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117 return v;
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118 }
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119
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120 public static long assert_long(long v) throws LuanException {
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121 return v;
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122 }
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123
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124 public static double assert_double(double v) throws LuanException {
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125 return v;
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126 }
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127
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128 public static float assert_float(float v) throws LuanException {
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129 return v;
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130 }
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131
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132 public static LuanFunction range(final double from,final double to,Double stepV) throws LuanException {
109
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133 final double step = stepV==null ? 1.0 : stepV;
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134 if( step == 0.0 )
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135 throw new LuanException("bad argument #3 (step may not be zero)");
109
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136 return new LuanFunction() {
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137 double v = from;
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138
112
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139 @Override public Object call(LuanState luan,Object[] args) {
109
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140 if( step > 0.0 && v > to || step < 0.0 && v < to )
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141 return LuanFunction.NOTHING;
109
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142 double rtn = v;
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143 v += step;
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144 return rtn;
109
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145 }
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146 };
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147 }
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148
116
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149 public static LuanFunction values(final Object... args) throws LuanException {
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150 return new LuanFunction() {
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151 int i = 0;
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152
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153 @Override public Object call(LuanState luan,Object[] unused) {
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154 if( i >= args.length )
128
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155 return LuanFunction.NOTHING;
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156 return args[i++];
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157 }
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158 };
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159 }
143
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160
326
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161 private LuanFunction fn(Object obj) {
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162 return obj instanceof LuanFunction ? (LuanFunction)obj : null;
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163 }
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164
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165 public static Object try_(LuanState luan,LuanTable blocks,Object... args) throws LuanException {
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166 Utils.checkNotNull(blocks);
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167 Object obj = blocks.get(luan,1);
326
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168 if( obj == null )
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169 throw new LuanException("missing 'try' value");
326
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170 if( !(obj instanceof LuanFunction) )
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171 throw new LuanException("bad 'try' value (function expected, got "+Luan.type(obj)+")");
326
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172 LuanFunction tryFn = (LuanFunction)obj;
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173 LuanFunction catchFn = null;
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174 obj = blocks.get(luan,"catch");
326
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175 if( obj != null ) {
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176 if( !(obj instanceof LuanFunction) )
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177 throw new LuanException("bad 'catch' value (function expected, got "+Luan.type(obj)+")");
326
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178 catchFn = (LuanFunction)obj;
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179 }
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180 LuanFunction finallyFn = null;
575
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181 obj = blocks.get(luan,"finally");
326
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182 if( obj != null ) {
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183 if( !(obj instanceof LuanFunction) )
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184 throw new LuanException("bad 'finally' value (function expected, got "+Luan.type(obj)+")");
326
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185 finallyFn = (LuanFunction)obj;
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186 }
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187 try {
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188 return tryFn.call(luan,args);
326
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189 } catch(LuanException e) {
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190 if( catchFn == null )
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191 throw e;
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192 return catchFn.call(luan,new Object[]{e.table()});
326
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193 } finally {
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194 if( finallyFn != null )
574
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195 finallyFn.call(luan);
326
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196 }
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197 }
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198
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199 @LuanMethod public static Object[] pcall(LuanState luan,LuanFunction f,Object... args) {
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200 try {
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201 Object[] r = Luan.array(f.call(luan,args));
326
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202 Object[] rtn = new Object[r.length+1];
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203 rtn[0] = true;
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204 for( int i=0; i<r.length; i++ ) {
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205 rtn[i+1] = r[i];
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206 }
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207 return rtn;
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208 } catch(LuanException e) {
481
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209 return new Object[]{false,e.table()};
326
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210 }
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211 }
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212
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213 public static String number_type(Number v) throws LuanException {
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214 Utils.checkNotNull(v);
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215 return v.getClass().getSimpleName().toLowerCase();
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216 }
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217
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218 public static int hash_code(Object obj) throws LuanException {
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219 if( obj == null ) {
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220 return 0;
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221 } else {
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222 return obj.hashCode();
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223 }
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224 }
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225
2
4da26b11d12a start interp
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226 }