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annotate core/src/luan/modules/StringLuan.java @ 574:6cc2f047019b

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remove LuanState.call()
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 13 Jul 2015 12:31:53 -0600
parents f1601a4ce1aa
children 7c3ad6db8ac3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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167
4c0131c2b650 merge luan/lib into modules
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1 package luan.modules;
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2
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3 import java.util.regex.Pattern;
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4 import java.util.regex.Matcher;
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5 import luan.Luan;
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6 import luan.LuanState;
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7 import luan.LuanTable;
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8 import luan.LuanFunction;
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9 import luan.LuanJavaFunction;
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10 import luan.LuanElement;
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11 import luan.LuanException;
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12 import luan.LuanMethod;
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13 import luan.LuanBit;
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15
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ebe9db183eb7 rename *Lib.java to *Luan.java
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16 public final class StringLuan {
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18 static int start(String s,int i) {
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19 int len = s.length();
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20 return i==0 ? 0 : i > 0 ? Math.min(i-1,len) : Math.max(len+i,0);
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21 }
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23 static int start(String s,Integer i,int dflt) {
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24 return i==null ? dflt : start(s,i);
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25 }
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27 static int end(String s,int i) {
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28 int len = s.length();
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29 return i==0 ? 0 : i > 0 ? Math.min(i,len) : Math.max(len+i+1,0);
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30 }
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32 static int end(String s,Integer i,int dflt) {
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33 return i==null ? dflt : end(s,i);
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34 }
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35
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36 @LuanMethod public static Integer[] unicode(LuanState luan,String s,Integer i,Integer j) throws LuanException {
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37 Utils.checkNotNull(luan,s);
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38 int start = start(s,i,1);
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39 int end = end(s,j,start+1);
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40 Integer[] chars = new Integer[end-start];
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41 for( int k=0; k<chars.length; k++ ) {
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42 chars[k] = (int)s.charAt(start+k);
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43 }
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44 return chars;
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45 }
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46
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47 public static String char_(int... chars) {
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48 char[] a = new char[chars.length];
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49 for( int i=0; i<chars.length; i++ ) {
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50 a[i] = (char)chars[i];
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51 }
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52 return new String(a);
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53 }
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54
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55 @LuanMethod public static byte[] to_binary(String s) {
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56 return s.getBytes();
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57 }
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58
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59 public static String lower(LuanState luan,String s) throws LuanException {
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60 Utils.checkNotNull(luan,s);
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61 return s.toLowerCase();
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62 }
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63
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64 public static String upper(LuanState luan,String s) throws LuanException {
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65 Utils.checkNotNull(luan,s);
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66 return s.toUpperCase();
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67 }
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68
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69 public static String trim(LuanState luan,String s) throws LuanException {
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70 Utils.checkNotNull(luan,s);
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71 return s.trim();
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72 }
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74 public static String reverse(LuanState luan,String s) throws LuanException {
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75 Utils.checkNotNull(luan,s);
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76 return new StringBuilder(s).reverse().toString();
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77 }
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78
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79 public static String rep(String s,int n,String sep) {
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80 if( n < 1 )
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81 return "";
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82 StringBuilder buf = new StringBuilder(s);
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83 while( --n > 0 ) {
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84 if( sep != null )
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85 buf.append(sep);
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86 buf.append(s);
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87 }
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88 return buf.toString();
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89 }
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90
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91 public static String sub(LuanState luan,String s,int i,Integer j) throws LuanException {
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92 Utils.checkNotNull(luan,s);
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93 int start = start(s,i);
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94 int end = end(s,j,s.length());
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95 return s.substring(start,end);
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96 }
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97
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98 @LuanMethod public static Object[] find(String s,String pattern,Integer init,Boolean plain) {
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99 int start = start(s,init,0);
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100 if( Boolean.TRUE.equals(plain) ) {
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101 int i = s.indexOf(pattern,start);
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102 return i == -1 ? null : new Integer[]{i+1,i+pattern.length()};
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103 }
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104 Matcher m = Pattern.compile(pattern).matcher(s);
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105 if( !m.find(start) )
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106 return null;
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107 int n = m.groupCount();
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108 Object[] rtn = new Object[2+n];
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109 rtn[0] = m.start() + 1;
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110 rtn[1] = m.end();
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111 for( int i=0; i<n; i++ ) {
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112 rtn[2+i] = m.group(i+1);
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113 }
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114 return rtn;
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115 }
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116
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117 @LuanMethod public static String[] match(String s,String pattern,Integer init) {
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118 int start = start(s,init,0);
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119 Matcher m = Pattern.compile(pattern).matcher(s);
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120 if( !m.find(start) )
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121 return null;
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122 int n = m.groupCount();
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123 if( n == 0 )
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124 return new String[]{m.group()};
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125 String[] rtn = new String[n];
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126 for( int i=0; i<n; i++ ) {
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127 rtn[i] = m.group(i+1);
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128 }
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129 return rtn;
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130 }
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131
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132 public static LuanFunction gmatch(LuanState luan,String s,String pattern) throws LuanException {
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133 Utils.checkNotNull(luan,s);
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134 final Matcher m = Pattern.compile(pattern).matcher(s);
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135 return new LuanFunction() {
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136 @Override public Object call(LuanState luan,Object[] args) {
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137 if( !m.find() )
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138 return null;
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139 final int n = m.groupCount();
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140 if( n == 0 )
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141 return m.group();
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142 String[] rtn = new String[n];
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143 for( int i=0; i<n; i++ ) {
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144 rtn[i] = m.group(i+1);
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145 }
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146 return rtn;
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147 }
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148 };
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149 }
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150
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151 @LuanMethod public static Object[] gsub(LuanState luan,String s,String pattern,Object repl,Integer n) throws LuanException {
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152 int max = n==null ? Integer.MAX_VALUE : n;
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153 final Matcher m = Pattern.compile(pattern).matcher(s);
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154 if( repl instanceof String ) {
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155 String replacement = (String)repl;
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156 int i = 0;
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157 StringBuffer sb = new StringBuffer();
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158 while( i<max && m.find() ) {
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159 m.appendReplacement(sb,replacement);
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160 i++;
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161 }
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162 m.appendTail(sb);
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163 return new Object[]{ sb.toString(), i };
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164 }
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165 if( repl instanceof LuanTable ) {
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166 LuanTable t = (LuanTable)repl;
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167 int i = 0;
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168 StringBuffer sb = new StringBuffer();
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169 while( i<max && m.find() ) {
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170 String match = m.groupCount()==0 ? m.group() : m.group(1);
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171 Object val = t.get(luan.JAVA,match);
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172 if( val != null ) {
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173 String replacement = luan.JAVA.toString(val);
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174 m.appendReplacement(sb,replacement);
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175 }
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176 i++;
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177 }
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178 m.appendTail(sb);
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179 return new Object[]{ sb.toString(), i };
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180 }
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181 if( repl instanceof LuanFunction ) {
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182 LuanFunction fn = (LuanFunction)repl;
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183 int i = 0;
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184 StringBuffer sb = new StringBuffer();
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185 while( i<max && m.find() ) {
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186 Object[] args;
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187 final int count = m.groupCount();
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188 if( count == 0 ) {
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189 args = new String[]{m.group()};
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190 } else {
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191 args = new String[count];
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192 for( int j=0; j<count; j++ ) {
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193 args[j] = m.group(j+1);
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194 }
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195 }
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196 Object val = Luan.first( fn.call(luan,args) );
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197 if( val != null ) {
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198 String replacement = luan.JAVA.toString(val);
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199 m.appendReplacement(sb,replacement);
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200 }
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201 i++;
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202 }
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203 m.appendTail(sb);
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204 return new Object[]{ sb.toString(), i };
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205 }
130
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206 throw luan.exception( "bad argument #3 to 'gsub' (string/function/table expected)" );
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207 }
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208
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209 // note - String.format() is too stupid to convert between ints and floats.
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210 public static String format(String format,Object... args) {
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211 return String.format(format,args);
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212 }
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213
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214 public static String concat(LuanState luan,Object... args) throws LuanException {
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215 StringBuilder sb = new StringBuilder();
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216 for( Object arg : args ) {
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217 sb.append( luan.JAVA.toString(arg) );
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218 }
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219 return sb.toString();
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220 }
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221
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222 public static String encode(String s) {
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223 return Luan.stringEncode(s);
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224 }
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225
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226 public static Number to_number(LuanState luan,String s,Integer base) throws LuanException {
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227 Utils.checkNotNull(luan,s);
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228 try {
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229 if( base == null ) {
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230 return Double.valueOf(s);
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231 } else {
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232 return Long.valueOf(s,base);
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233 }
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234 } catch(NumberFormatException e) {}
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235 return null;
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236 }
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237
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238 public static boolean matches(String s,String pattern) {
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239 return s.matches(pattern);
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240 }
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241
43
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242 }