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annotate src/luan/modules/BasicLuan.java @ 1561:e1a13e707bf3

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start immutable
author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 05 Nov 2020 20:24:09 -0700
parents 26c51acf00f3
children b89212fd04b5
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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2
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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.LuanCloner;
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18 import luan.LuanImmutabler;
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19 import luan.modules.parsers.LuanToString;
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21
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22 public final class BasicLuan {
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24 public static String type(Object obj) {
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25 return Luan.type(obj);
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26 }
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27
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28 public static LuanFunction load(Luan luan,String text,String sourceName,boolean persist,LuanTable env)
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29 throws LuanException
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30 {
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31 Utils.checkNotNull(text);
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32 Utils.checkNotNull(sourceName,1);
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33 return luan.load(text,sourceName,persist,env);
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34 }
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35 /*
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36 public static LuanFunction load_file(Luan luan,String fileName) throws LuanException {
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37 if( fileName == null ) {
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38 fileName = "stdin:";
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39 } else if( fileName.indexOf(':') == -1 ) {
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40 fileName = "file:" + fileName;
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41 }
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42 String src = PackageLuan.read(luan,fileName);
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43 if( src == null )
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44 return null;
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45 return load(luan,src,fileName,null);
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46 }
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47 */
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48 public static LuanFunction pairs(final LuanTable t) throws LuanException {
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49 Utils.checkNotNull(t);
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50 return t.pairs();
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51 }
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52
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53 private static class Ipairs extends LuanFunction {
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54 List<Object> list;
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55 int i = 0;
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56 final int size;
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57
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58 Ipairs(LuanTable t) {
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59 super(true);
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60 list = t.asList();
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61 size = list.size();
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62 }
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63
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64 @Override public Object[] call(Object[] args) {
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65 if( i >= size )
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66 return LuanFunction.NOTHING;
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67 Object val = list.get(i++);
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68 return new Object[]{i,val};
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69 }
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70
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71 @Override protected void completeClone(LuanFunction dc,LuanCloner cloner) {
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72 Ipairs clone = (Ipairs)dc;
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73 clone.list = (List)cloner.clone(list);
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74 super.completeClone(dc,cloner);
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75 }
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76
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77 @Override public void makeImmutable(LuanImmutabler immutabler) throws LuanException {
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78 throw new LuanException("ipairs cannot be made immutable");
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79 }
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80 }
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81
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82 public static LuanFunction ipairs(LuanTable t) throws LuanException {
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83 Utils.checkNotNull(t);
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84 return new Ipairs(t);
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85 }
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86
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87 public static Object get_metatable(LuanTable table) throws LuanException {
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88 Utils.checkNotNull(table);
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89 LuanTable metatable = table.getMetatable();
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90 if( metatable == null )
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91 return null;
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92 Object obj = metatable.rawGet("__metatable");
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93 return obj!=null ? obj : metatable;
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94 }
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95
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96 public static void set_metatable(LuanTable table,LuanTable metatable) throws LuanException {
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97 Utils.checkNotNull(table);
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98 if( table.getHandler("__metatable") != null )
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99 throw new LuanException("cannot change a protected metatable");
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100 table.setMetatable(metatable);
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101 }
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102
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103 public static boolean raw_equal(Object v1,Object v2) {
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104 return v1 == v2 || v1 != null && v1.equals(v2);
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105 }
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106
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107 public static Object raw_get(LuanTable table,Object index) {
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108 return table.rawGet(index);
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109 }
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110
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111 public static void raw_set(LuanTable table,Object index,Object value) throws LuanException {
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112 table.rawPut(index,value);
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113 }
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114
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115 public static int raw_len(Object v) throws LuanException {
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116 if( v instanceof String ) {
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117 String s = (String)v;
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118 return s.length();
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119 }
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120 if( v instanceof LuanTable ) {
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121 LuanTable t = (LuanTable)v;
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122 return t.rawLength();
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123 }
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124 throw new LuanException( "bad argument #1 to 'raw_len' (table or string expected)" );
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125 }
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126
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127 public static String to_string(Object v) throws LuanException {
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128 return Luan.luanToString(v);
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129 }
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130
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131 public static LuanTable new_error(Luan luan,Object msg) throws LuanException {
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132 String s = Luan.luanToString(msg);
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133 LuanTable tbl = new LuanException(s).table(luan);
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134 tbl.rawPut( "message", msg );
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135 return tbl;
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136 }
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137
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138 public static int assert_integer(int 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 long assert_long(long 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 double assert_double(double 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 float assert_float(float v) {
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151 return v;
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152 }
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153
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154 public static LuanFunction range(final double from,final double to,Double stepV) throws LuanException {
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155 final double step = stepV==null ? 1.0 : stepV;
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156 if( step == 0.0 )
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157 throw new LuanException("bad argument #3 (step may not be zero)");
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158 return new LuanFunction(false) {
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159 double v = from;
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160
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161 @Override public Object call(Object[] args) {
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162 if( step > 0.0 && v > to || step < 0.0 && v < to )
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163 return LuanFunction.NOTHING;
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164 double rtn = v;
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165 v += step;
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166 return rtn;
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167 }
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168 };
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169 }
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170
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171 private static class Values extends LuanFunction {
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172 Object[] args;
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173 int i = 0;
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174
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175 Values(Object[] args) {
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176 super(true);
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177 this.args = args;
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178 }
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179
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180 @Override public Object[] call(Object[] x) {
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181 if( i >= args.length )
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182 return LuanFunction.NOTHING;
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183 Object val = args[i++];
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184 return new Object[]{i,val};
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185 }
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186
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187 @Override protected void completeClone(LuanFunction dc,LuanCloner cloner) {
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188 Values clone = (Values)dc;
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189 clone.args = (Object[])cloner.clone(args);
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190 super.completeClone(dc,cloner);
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191 }
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192
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193 @Override public void makeImmutable(LuanImmutabler immutabler) throws LuanException {
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194 throw new LuanException("values cannot be made immutable");
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195 }
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196 }
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197
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198 public static LuanFunction values(final Object... args) throws LuanException {
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199 return new Values(args);
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200 }
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201
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202 private LuanFunction fn(Object obj) {
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203 return obj instanceof LuanFunction ? (LuanFunction)obj : null;
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204 }
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205
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206 public static String number_type(Number v) throws LuanException {
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207 Utils.checkNotNull(v);
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208 return v.getClass().getSimpleName().toLowerCase();
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209 }
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210
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211 public static int hash_code(Object obj) throws LuanException {
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212 if( obj == null ) {
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213 return 0;
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214 } else if( obj instanceof byte[] ) {
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215 return Arrays.hashCode((byte[])obj);
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216 } else {
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217 return obj.hashCode();
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218 }
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219 }
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220
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221 public static String stringify(Object obj,LuanTable options,LuanTable subOptions) throws LuanException {
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222 LuanToString lts = new LuanToString(options,subOptions);
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223 return lts.toString(obj);
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224 }
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225
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226 public static String json_string(Object obj,LuanTable options) throws LuanException {
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227 JsonToString jts = new JsonToString();
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228 if( options != null ) {
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229 options = new LuanTable(options);
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230 Boolean compressed = Utils.removeBoolean(options,"compressed");
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231 if( compressed != null )
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232 jts.compressed = compressed;
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233 Utils.checkEmpty(options);
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234 }
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235 return jts.toString(Luan.toJava(obj));
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236 }
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237
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238 private void BasicLuan() {} // never
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239 }