Mercurial Hosting > luan
annotate core/src/luan/modules/StringLuan.java @ 302:2f8938fc518c
fix modules Binary and Html
git-svn-id: https://luan-java.googlecode.com/svn/trunk@303 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Thu, 18 Dec 2014 04:56:30 +0000 |
parents | 899253043270 |
children | 5e7450ac27f2 |
rev | line source |
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167
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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 |
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14 |
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15 public final class StringLuan { |
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16 |
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17 public static Object __index(LuanState luan,final String s,Object key) throws LuanException { |
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18 LuanTable mod = (LuanTable)PackageLuan.loaded(luan).get("luan:String"); |
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19 if( mod!=null ) { |
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20 Object obj = mod.get(key); |
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21 if( obj instanceof LuanFunction ) { |
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22 final LuanFunction fn = (LuanFunction)obj; |
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23 return new LuanFunction() { |
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24 @Override public Object call(LuanState luan,Object[] args) throws LuanException { |
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25 Object[] a = new Object[args.length+1]; |
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26 a[0] = s; |
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27 System.arraycopy(args,0,a,1,args.length); |
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28 return fn.call(luan,a); |
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29 } |
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30 }; |
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31 } |
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32 } |
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33 return null; |
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34 } |
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35 |
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36 static int start(String s,int i) { |
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37 int len = s.length(); |
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38 return i==0 ? 0 : i > 0 ? Math.min(i-1,len) : Math.max(len+i,0); |
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39 } |
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40 |
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41 static int start(String s,Integer i,int dflt) { |
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42 return i==null ? dflt : start(s,i); |
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43 } |
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44 |
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45 static int end(String s,int i) { |
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46 int len = s.length(); |
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47 return i==0 ? 0 : i > 0 ? Math.min(i,len) : Math.max(len+i+1,0); |
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48 } |
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49 |
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50 static int end(String s,Integer i,int dflt) { |
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51 return i==null ? dflt : end(s,i); |
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52 } |
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53 |
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54 @LuanMethod public static Integer[] byte_(String s,Integer i,Integer j) { |
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55 if( i== null ) |
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56 i = 1; |
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57 if( j==null ) |
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58 j = i; |
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59 s = s.substring(i-1,j); |
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60 char[] a = s.toCharArray(); |
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61 Integer[] chars = new Integer[a.length]; |
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62 for( int k=0; k<a.length; k++ ) { |
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63 chars[k] = (int)a[k]; |
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64 } |
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65 return chars; |
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66 } |
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67 |
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68 public static String char_(int... chars) { |
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69 char[] a = new char[chars.length]; |
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70 for( int i=0; i<chars.length; i++ ) { |
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71 a[i] = (char)chars[i]; |
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72 } |
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73 return new String(a); |
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74 } |
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75 |
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76 public static int len(LuanState luan,String s) throws LuanException { |
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77 Utils.checkNotNull(luan,s); |
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78 return s.length(); |
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79 } |
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80 |
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81 public static String lower(LuanState luan,String s) throws LuanException { |
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82 Utils.checkNotNull(luan,s); |
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83 return s.toLowerCase(); |
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84 } |
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85 |
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86 public static String upper(LuanState luan,String s) throws LuanException { |
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87 Utils.checkNotNull(luan,s); |
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88 return s.toUpperCase(); |
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89 } |
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90 |
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91 public static String trim(LuanState luan,String s) throws LuanException { |
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92 Utils.checkNotNull(luan,s); |
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93 return s.trim(); |
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94 } |
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95 |
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96 public static String reverse(LuanState luan,String s) throws LuanException { |
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97 Utils.checkNotNull(luan,s); |
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98 return new StringBuilder(s).reverse().toString(); |
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99 } |
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100 |
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101 public static String rep(String s,int n,String sep) { |
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102 if( n < 1 ) |
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103 return ""; |
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104 StringBuilder buf = new StringBuilder(s); |
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105 while( --n > 0 ) { |
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106 if( sep != null ) |
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107 buf.append(sep); |
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108 buf.append(s); |
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109 } |
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110 return buf.toString(); |
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111 } |
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112 |
251
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113 public static String sub(LuanState luan,String s,int i,Integer j) throws LuanException { |
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114 Utils.checkNotNull(luan,s); |
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115 int start = start(s,i); |
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116 int end = end(s,j,s.length()); |
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117 return s.substring(start,end); |
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118 } |
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119 |
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120 public static int[] find(String s,String pattern,Integer init,Boolean plain) { |
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121 int start = start(s,init,0); |
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122 if( Boolean.TRUE.equals(plain) ) { |
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123 int i = s.indexOf(pattern,start); |
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124 return i == -1 ? null : new int[]{i+1,i+pattern.length()}; |
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125 } |
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126 Matcher m = Pattern.compile(pattern).matcher(s); |
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127 return m.find(start) ? new int[]{m.start()+1,m.end()} : null; |
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128 } |
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129 |
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130 @LuanMethod public static String[] match(String s,String pattern,Integer init) { |
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131 int start = start(s,init,0); |
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132 Matcher m = Pattern.compile(pattern).matcher(s); |
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133 if( !m.find(start) ) |
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134 return null; |
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135 final int n = m.groupCount(); |
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136 if( n == 0 ) |
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137 return new String[]{m.group()}; |
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138 String[] rtn = new String[n]; |
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139 for( int i=0; i<n; i++ ) { |
161
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140 rtn[i] = m.group(i+1); |
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141 } |
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142 return rtn; |
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143 } |
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144 |
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145 public static LuanFunction gmatch(LuanState luan,String s,String pattern) throws LuanException { |
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146 Utils.checkNotNull(luan,s); |
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147 final Matcher m = Pattern.compile(pattern).matcher(s); |
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148 return new LuanFunction() { |
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149 @Override public Object call(LuanState luan,Object[] args) { |
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150 if( !m.find() ) |
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151 return null; |
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152 final int n = m.groupCount(); |
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153 if( n == 0 ) |
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154 return m.group(); |
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155 String[] rtn = new String[n]; |
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156 for( int i=0; i<n; i++ ) { |
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157 rtn[i] = m.group(i+1); |
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158 } |
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159 return rtn; |
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160 } |
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161 }; |
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162 } |
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163 |
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164 @LuanMethod public static Object[] gsub(LuanState luan,String s,String pattern,Object repl,Integer n) throws LuanException { |
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165 int max = n==null ? Integer.MAX_VALUE : n; |
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166 final Matcher m = Pattern.compile(pattern).matcher(s); |
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167 if( repl instanceof String ) { |
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168 String replacement = (String)repl; |
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169 int i = 0; |
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170 StringBuffer sb = new StringBuffer(); |
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171 while( i<max && m.find() ) { |
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172 m.appendReplacement(sb,replacement); |
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173 i++; |
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174 } |
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175 m.appendTail(sb); |
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176 return new Object[]{ sb.toString(), i }; |
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177 } |
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178 if( repl instanceof LuanTable ) { |
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179 LuanTable t = (LuanTable)repl; |
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180 int i = 0; |
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181 StringBuffer sb = new StringBuffer(); |
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182 while( i<max && m.find() ) { |
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183 String match = m.groupCount()==0 ? m.group() : m.group(1); |
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184 Object val = t.get(match); |
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185 if( Luan.toBoolean(val) ) { |
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186 String replacement = Luan.asString(val); |
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187 if( replacement==null ) |
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188 throw luan.exception( "invalid replacement value (a "+Luan.type(val)+")" ); |
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189 m.appendReplacement(sb,replacement); |
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190 } |
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191 i++; |
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192 } |
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193 m.appendTail(sb); |
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194 return new Object[]{ sb.toString(), i }; |
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195 } |
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196 if( repl instanceof LuanFunction ) { |
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197 LuanFunction fn = (LuanFunction)repl; |
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198 int i = 0; |
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199 StringBuffer sb = new StringBuffer(); |
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200 while( i<max && m.find() ) { |
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201 Object[] args; |
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202 final int count = m.groupCount(); |
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203 if( count == 0 ) { |
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204 args = new Object[]{m.group()}; |
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205 } else { |
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206 args = new Object[count]; |
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207 for( int j=0; j<count; j++ ) { |
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208 args[j] = m.group(j); |
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209 } |
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210 } |
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211 Object val = Luan.first( luan.call(fn,"repl-arg",args) ); |
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212 if( Luan.toBoolean(val) ) { |
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213 String replacement = Luan.asString(val); |
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214 if( replacement==null ) |
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215 throw luan.exception( "invalid replacement value (a "+Luan.type(val)+")" ); |
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216 m.appendReplacement(sb,replacement); |
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217 } |
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218 i++; |
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219 } |
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220 m.appendTail(sb); |
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221 return new Object[]{ sb.toString(), i }; |
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222 } |
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223 throw luan.exception( "bad argument #3 to 'gsub' (string/function/table expected)" ); |
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224 } |
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225 |
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226 // note - String.format() is too stupid to convert between ints and floats. |
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227 public static String format(String format,Object... args) { |
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228 return String.format(format,args); |
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229 } |
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230 |
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231 public static String concat(LuanState luan,Object... args) throws LuanException { |
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232 StringBuilder sb = new StringBuilder(); |
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233 for( Object arg : args ) { |
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234 sb.append( luan.toString(arg) ); |
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235 } |
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236 return sb.toString(); |
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237 } |
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238 |
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239 } |