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annotate src/luan/modules/BasicLuan.java @ 1578:c922446f53aa

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immutable threading
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 08 Feb 2021 14:16:19 -0700
parents 8fbcc4747091
children fa066aaa068c
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 java.util.Arrays;
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11 import java.util.HashSet;
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12 import goodjava.json.JsonToString;
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13 import luan.Luan;
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14 import luan.LuanTable;
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15 import luan.LuanFunction;
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16 import luan.LuanException;
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17 import luan.LuanMutable;
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18 import luan.modules.parsers.LuanToString;
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21 public final class BasicLuan {
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23 public static String type(Object obj) {
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24 return Luan.type(obj);
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25 }
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26
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27 public static LuanFunction load(Luan luan,String text,String sourceName,boolean persist,LuanTable env)
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28 throws LuanException
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29 {
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30 Utils.checkNotNull(text);
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31 Utils.checkNotNull(sourceName,1);
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32 return luan.load(text,sourceName,persist,env);
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33 }
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34 /*
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35 public static LuanFunction load_file(Luan luan,String fileName) throws LuanException {
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36 if( fileName == null ) {
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37 fileName = "stdin:";
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38 } else if( fileName.indexOf(':') == -1 ) {
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39 fileName = "file:" + fileName;
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40 }
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41 String src = PackageLuan.read(luan,fileName);
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42 if( src == null )
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43 return null;
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44 return load(luan,src,fileName,null);
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45 }
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46 */
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47 public static LuanFunction pairs(Luan luan,final LuanTable t) throws LuanException {
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48 Utils.checkNotNull(t);
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49 return t.pairs(luan);
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50 }
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51
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52 private static final class Ipairs extends LuanFunction implements LuanMutable {
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53 List<Object> list;
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54 int i = 0;
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55 final int size;
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56
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57 Ipairs(LuanTable t) {
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58 list = t.asList();
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59 size = list.size();
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60 }
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61
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62 @Override public Object[] call(Luan luan,Object[] args) {
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63 if( i >= size )
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64 return LuanFunction.NOTHING;
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65 Object val = list.get(i++);
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66 return new Object[]{i,val};
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67 }
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68
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69 @Override public boolean isImmutable() {
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70 return false;
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71 }
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72
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73 @Override public void makeImmutable() {
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74 throw new RuntimeException("ipairs cannot be made immutable");
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75 }
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76 }
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77
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78 public static LuanFunction ipairs(LuanTable t) throws LuanException {
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79 Utils.checkNotNull(t);
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80 return new Ipairs(t);
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81 }
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82
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83 public static Object get_metatable(LuanTable table) throws LuanException {
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84 Utils.checkNotNull(table);
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85 LuanTable metatable = table.getMetatable();
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86 if( metatable == null )
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87 return null;
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88 Object obj = metatable.rawGet("__metatable");
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89 return obj!=null ? obj : metatable;
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90 }
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91
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92 public static void set_metatable(Luan luan,LuanTable table,LuanTable metatable) throws LuanException {
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93 Utils.checkNotNull(table);
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94 if( table.getHandler(luan,"__metatable") != null )
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95 throw new LuanException("cannot change a protected metatable");
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96 table.setMetatable(metatable);
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97 }
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98
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99 public static boolean raw_equal(Object v1,Object v2) {
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100 return v1 == v2 || v1 != null && v1.equals(v2);
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101 }
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102
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103 public static Object raw_get(LuanTable table,Object index) {
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104 return table.rawGet(index);
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105 }
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106
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107 public static void raw_set(LuanTable table,Object index,Object value) throws LuanException {
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108 table.rawPut(index,value);
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109 }
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110
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111 public static int raw_len(Object v) throws LuanException {
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112 if( v instanceof String ) {
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113 String s = (String)v;
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114 return s.length();
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115 }
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116 if( v instanceof LuanTable ) {
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117 LuanTable t = (LuanTable)v;
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118 return t.rawLength();
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119 }
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120 throw new LuanException( "bad argument #1 to 'raw_len' (table or string expected)" );
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121 }
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122
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123 public static String to_string(Luan luan,Object v) throws LuanException {
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124 return luan.luanToString(v);
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125 }
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126
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127 public static LuanTable new_error(Luan luan,Object msg) throws LuanException {
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128 String s = luan.luanToString(msg);
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129 LuanTable tbl = new LuanException(s).table(luan);
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130 tbl.rawPut( "message", msg );
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131 return tbl;
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132 }
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133
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134 public static int assert_integer(int v) {
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135 return v;
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136 }
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137
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138 public static long assert_long(long v) {
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139 return v;
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140 }
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141
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142 public static double assert_double(double v) {
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143 return v;
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144 }
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145
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146 public static float assert_float(float v) {
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147 return v;
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148 }
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149
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150 public static LuanFunction range(final double from,final double to,Double stepV) throws LuanException {
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151 final double step = stepV==null ? 1.0 : stepV;
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152 if( step == 0.0 )
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153 throw new LuanException("bad argument #3 (step may not be zero)");
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154 return new LuanFunction() {
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155 double v = from;
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156
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157 @Override public Object call(Luan luan,Object[] args) {
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158 if( step > 0.0 && v > to || step < 0.0 && v < to )
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159 return LuanFunction.NOTHING;
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160 double rtn = v;
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161 v += step;
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162 return rtn;
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163 }
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164 };
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165 }
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166
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167 private static final class Values extends LuanFunction implements LuanMutable {
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168 Object[] args;
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169 int i = 0;
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170
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171 Values(Object[] args) {
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172 this.args = args;
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173 }
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174
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175 @Override public Object[] call(Luan luan,Object[] x) {
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176 if( i >= args.length )
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177 return LuanFunction.NOTHING;
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178 Object val = args[i++];
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179 return new Object[]{i,val};
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180 }
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181
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182 @Override public boolean isImmutable() {
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183 return false;
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184 }
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185
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186 @Override public void makeImmutable() {
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187 throw new RuntimeException("values cannot be made immutable");
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188 }
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189 }
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190
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191 public static LuanFunction values(final Object... args) throws LuanException {
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192 return new Values(args);
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193 }
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194
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195 private LuanFunction fn(Object obj) {
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196 return obj instanceof LuanFunction ? (LuanFunction)obj : null;
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197 }
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198
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199 public static String number_type(Number v) throws LuanException {
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200 Utils.checkNotNull(v);
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201 return v.getClass().getSimpleName().toLowerCase();
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202 }
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203
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204 public static int hash_code(Object obj) throws LuanException {
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205 if( obj == null ) {
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206 return 0;
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207 } else if( obj instanceof byte[] ) {
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208 return Arrays.hashCode((byte[])obj);
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209 } else {
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210 return obj.hashCode();
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211 }
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212 }
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213
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214 public static String stringify(Object obj,LuanTable options,LuanTable subOptions) throws LuanException {
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215 LuanToString lts = new LuanToString(options,subOptions);
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216 return lts.toString(obj);
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217 }
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218
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219 public static String json_string(Object obj,LuanTable options) throws LuanException {
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220 JsonToString jts = new JsonToString();
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221 if( options != null ) {
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222 options = new LuanTable(options);
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223 Boolean compressed = Utils.removeBoolean(options,"compressed");
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224 if( compressed != null )
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225 jts.compressed = compressed;
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226 Utils.checkEmpty(options);
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227 }
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228 return jts.toString(Luan.toJava(obj));
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229 }
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230
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231 public static Object get_local_cloned(Luan luan,Object obj,Object key) {
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232 return luan.getLocalCloned(obj,key);
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233 }
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234
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235 public static void set_local_cloned(Luan luan,Object obj,Object key,Object value) {
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236 luan.setLocalCloned(obj,key,value);
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237 }
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238
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239 public static Object get_local_only(Luan luan,Object obj,Object key) {
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240 return luan.getLocalOnly(obj,key);
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241 }
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242
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243 public static void set_local_only(Luan luan,Object obj,Object key,Object value) {
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244 luan.setLocalOnly(obj,key,value);
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245 }
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246
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247 public static boolean is_immutable(LuanMutable m) {
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248 return m.isImmutable();
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249 }
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250
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251 private void BasicLuan() {} // never
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252 }