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annotate src/luan/Luan.java @ 775:1a68fc55a80c

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simplify dir structure
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 26 Aug 2016 14:36:40 -0600
parents core/src/luan/Luan.java@b620b8e1010f
children 22652f4020fb
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1
2df768b926aa start Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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1 package luan;
2df768b926aa start Luan
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2
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4fe6c9fed486 add html processing
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3 import java.util.List;
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ebe9db183eb7 rename *Lib.java to *Luan.java
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4 import luan.modules.BasicLuan;
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b620b8e1010f remove Luan.load() allow_expression param and add Luan.eval()
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5 import luan.impl.LuanCompiler;
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b585d0915621 remove CmdLine.java and move code to Luan.java
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6
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2df768b926aa start Luan
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7
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8 public final class Luan {
1
2df768b926aa start Luan
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9
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5d4a78c93383 luan errors are now tables
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10 public static void main(String[] args) throws LuanException {
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11 LuanState luan = new LuanState();
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12 LuanFunction standalone = (LuanFunction)BasicLuan.load_file(luan,"classpath:luan/cmd_line.luan");
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13 standalone.call(luan,args);
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14 }
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15
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16 public static Object first(Object obj) {
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17 if( !(obj instanceof Object[]) )
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18 return obj;
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19 Object[] a = (Object[])obj;
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20 return a.length==0 ? null : a[0];
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21 }
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22
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23 public static Object[] array(Object obj) {
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24 return obj instanceof Object[] ? (Object[])obj : new Object[]{obj};
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25 }
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2df768b926aa start Luan
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27 public static String type(Object obj) {
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28 if( obj == null )
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29 return "nil";
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2df768b926aa start Luan
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30 if( obj instanceof String )
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31 return "string";
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2df768b926aa start Luan
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32 if( obj instanceof Boolean )
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33 return "boolean";
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34 if( obj instanceof Number )
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35 return "number";
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b2551f00bc51 fix type()
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36 if( obj instanceof LuanTable )
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37 return "table";
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38 if( obj instanceof LuanFunction )
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39 return "function";
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40 if( obj instanceof byte[] )
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41 return "binary";
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42 return "java";
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2df768b926aa start Luan
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43 }
2df768b926aa start Luan
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44
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45 public static String toString(Number n) {
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46 if( n instanceof Integer )
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47 return n.toString();
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48 int i = n.intValue();
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49 if( i == n.doubleValue() )
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50 return Integer.toString(i);
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51 String s = n.toString();
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52 int iE = s.indexOf('E');
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53 String ending = null;
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54 if( iE != -1 ) {
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55 ending = s.substring(iE);
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56 s = s.substring(0,iE);
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57 }
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58 if( s.endsWith(".0") )
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59 s = s.substring(0,s.length()-2);
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60 if( ending != null )
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61 s += ending;
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62 return s;
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63 }
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64
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65 public static Integer asInteger(Object obj) {
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66 if( obj instanceof Integer )
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67 return (Integer)obj;
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68 if( !(obj instanceof Number) )
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69 return null;
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70 Number n = (Number)obj;
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71 int i = n.intValue();
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72 return i==n.doubleValue() ? Integer.valueOf(i) : null;
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73 }
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74
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75 public static String stringEncode(String s) {
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76 s = s.replace("\\","\\\\");
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77 s = s.replace("\u0007","\\a");
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78 s = s.replace("\b","\\b");
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79 s = s.replace("\f","\\f");
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80 s = s.replace("\n","\\n");
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81 s = s.replace("\r","\\r");
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82 s = s.replace("\t","\\t");
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83 s = s.replace("\u000b","\\v");
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84 s = s.replace("\"","\\\"");
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85 s = s.replace("\'","\\'");
88
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86 return s;
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87 }
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88
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89
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90 // from LuanState
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91
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92 public static Boolean checkBoolean(Object obj) throws LuanException {
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93 if( obj instanceof Boolean )
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94 return (Boolean)obj;
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95 throw new LuanException("attempt to use a " + Luan.type(obj) + " value as a boolean" );
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96 }
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97
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98 public static String checkString(Object obj) throws LuanException {
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99 if( obj instanceof String )
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100 return (String)obj;
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101 throw new LuanException("attempt to use a " + Luan.type(obj) + " value as a string" );
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102 }
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103
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104 public static LuanFunction checkFunction(Object obj) throws LuanException {
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105 if( obj instanceof LuanFunction )
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106 return (LuanFunction)obj;
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107 throw new LuanException("attempt to call a " + Luan.type(obj) + " value" );
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108 }
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109
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110 public static boolean isLessThan(LuanState luan,Object o1,Object o2) throws LuanException {
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111 if( o1 instanceof Number && o2 instanceof Number ) {
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112 Number n1 = (Number)o1;
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113 Number n2 = (Number)o2;
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114 return n1.doubleValue() < n2.doubleValue();
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115 }
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116 if( o1 instanceof String && o2 instanceof String ) {
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117 String s1 = (String)o1;
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118 String s2 = (String)o2;
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119 return s1.compareTo(s2) < 0;
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120 }
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121 LuanFunction fn = getBinHandler("__lt",o1,o2);
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122 if( fn != null )
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123 return checkBoolean( Luan.first(fn.call(luan,new Object[]{o1,o2})) );
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124 throw new LuanException( "attempt to compare " + Luan.type(o1) + " with " + Luan.type(o2) );
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125 }
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126
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127 public static LuanFunction getBinHandler(String op,Object o1,Object o2) throws LuanException {
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128 if( o1 instanceof LuanTable ) {
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129 LuanFunction f1 = getHandlerFunction(op,(LuanTable)o1);
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130 if( f1 != null )
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131 return f1;
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132 }
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133 return o2 instanceof LuanTable ? getHandlerFunction(op,(LuanTable)o2) : null;
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134 }
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135
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136 public static LuanFunction getHandlerFunction(String op,LuanTable t) throws LuanException {
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137 Object f = t.getHandler(op);
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138 if( f == null )
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139 return null;
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140 return checkFunction(f);
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141 }
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142
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143 public static LuanFunction load(String text,String sourceName,LuanTable env)
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144 throws LuanException
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145 {
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146 return LuanCompiler.compile(text,sourceName,env);
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147 }
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148
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149 public static LuanFunction load(String text,String sourceName)
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150 throws LuanException
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151 {
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152 return load(text,sourceName,null);
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153 }
647
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154
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155
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156 private Luan() {} // never
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157 }