Mercurial Hosting > luan
annotate src/luan/modules/StringLuan.java @ 1274:383f924dfe9d
support multipart files in http request
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Tue, 04 Dec 2018 06:08:20 -0700 |
parents | 9fa8b8389578 |
children | 25746915a241 |
rev | line source |
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1 package luan.modules; |
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2 |
757 | 3 import java.util.Arrays; |
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4 import java.util.regex.Pattern; |
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5 import java.util.regex.Matcher; |
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6 import luan.Luan; |
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7 import luan.LuanState; |
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8 import luan.LuanTable; |
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9 import luan.LuanFunction; |
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10 import luan.LuanException; |
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11 import luan.LuanMethod; |
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12 |
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13 |
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14 public final class StringLuan { |
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15 |
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16 static int start(String s,int i) { |
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17 int len = s.length(); |
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18 return i==0 ? 0 : i > 0 ? Math.min(i-1,len) : Math.max(len+i,0); |
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19 } |
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20 |
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21 static int start(String s,Integer i,int dflt) { |
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22 return i==null ? dflt : start(s,i); |
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23 } |
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24 |
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25 static int end(String s,int i) { |
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26 int len = s.length(); |
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27 return i==0 ? 0 : i > 0 ? Math.min(i,len) : Math.max(len+i+1,0); |
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28 } |
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29 |
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30 static int end(String s,Integer i,int dflt) { |
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31 return i==null ? dflt : end(s,i); |
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32 } |
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33 |
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34 @LuanMethod public static Integer[] unicode(String s,Integer i,Integer j) throws LuanException { |
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35 Utils.checkNotNull(s); |
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36 int start = start(s,i,1); |
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37 int end = end(s,j,start+1); |
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38 Integer[] chars = new Integer[end-start]; |
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39 for( int k=0; k<chars.length; k++ ) { |
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40 chars[k] = (int)s.charAt(start+k); |
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41 } |
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42 return chars; |
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43 } |
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44 |
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45 public static String char_(int... chars) { |
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46 char[] a = new char[chars.length]; |
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47 for( int i=0; i<chars.length; i++ ) { |
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48 a[i] = (char)chars[i]; |
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49 } |
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50 return new String(a); |
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51 } |
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52 |
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53 @LuanMethod public static byte[] to_binary(String s) { |
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54 return s.getBytes(); |
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55 } |
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56 |
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57 public static String lower(String s) throws LuanException { |
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58 Utils.checkNotNull(s); |
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59 return s.toLowerCase(); |
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60 } |
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61 |
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62 public static String upper(String s) throws LuanException { |
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63 Utils.checkNotNull(s); |
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64 return s.toUpperCase(); |
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65 } |
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66 |
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67 public static String trim(String s) throws LuanException { |
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68 Utils.checkNotNull(s); |
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69 return s.trim(); |
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70 } |
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71 |
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72 public static String reverse(String s) throws LuanException { |
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73 Utils.checkNotNull(s); |
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74 return new StringBuilder(s).reverse().toString(); |
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75 } |
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76 |
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77 public static String rep(String s,int n,String sep) { |
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78 if( n < 1 ) |
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79 return ""; |
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80 StringBuilder buf = new StringBuilder(s); |
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81 while( --n > 0 ) { |
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82 if( sep != null ) |
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83 buf.append(sep); |
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84 buf.append(s); |
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85 } |
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86 return buf.toString(); |
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87 } |
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88 |
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89 public static String sub(String s,int i,Integer j) throws LuanException { |
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90 Utils.checkNotNull(s); |
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91 int start = start(s,i); |
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92 int end = end(s,j,s.length()); |
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93 return s.substring(start,end); |
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94 } |
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95 |
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96 @LuanMethod public static Object[] find(String s,String pattern,Integer init,Boolean plain) { |
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97 int start = start(s,init,0); |
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98 if( Boolean.TRUE.equals(plain) ) { |
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99 int i = s.indexOf(pattern,start); |
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100 return i == -1 ? null : new Integer[]{i+1,i+pattern.length()}; |
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101 } |
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102 Matcher m = Pattern.compile(pattern).matcher(s); |
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103 if( !m.find(start) ) |
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104 return null; |
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105 int n = m.groupCount(); |
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106 Object[] rtn = new Object[2+n]; |
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107 rtn[0] = m.start() + 1; |
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108 rtn[1] = m.end(); |
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109 for( int i=0; i<n; i++ ) { |
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110 rtn[2+i] = m.group(i+1); |
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111 } |
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112 return rtn; |
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113 } |
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114 |
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115 @LuanMethod public static String[] match(String s,String pattern,Integer init) { |
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116 int start = start(s,init,0); |
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117 Matcher m = Pattern.compile(pattern).matcher(s); |
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118 if( !m.find(start) ) |
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119 return null; |
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120 int n = m.groupCount(); |
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121 if( n == 0 ) |
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122 return new String[]{m.group()}; |
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123 String[] rtn = new String[n]; |
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124 for( int i=0; i<n; i++ ) { |
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125 rtn[i] = m.group(i+1); |
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126 } |
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127 return rtn; |
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128 } |
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129 |
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130 public static LuanFunction gmatch(String s,String pattern) throws LuanException { |
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131 Utils.checkNotNull(s); |
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132 final Matcher m = Pattern.compile(pattern).matcher(s); |
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133 return new LuanFunction() { |
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134 @Override public Object call(LuanState luan,Object[] args) { |
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135 if( !m.find() ) |
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136 return null; |
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137 final int n = m.groupCount(); |
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138 if( n == 0 ) |
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139 return m.group(); |
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140 String[] rtn = new String[n]; |
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141 for( int i=0; i<n; i++ ) { |
138
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142 rtn[i] = m.group(i+1); |
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143 } |
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144 return rtn; |
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145 } |
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146 }; |
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147 } |
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148 |
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149 @LuanMethod public static Object[] gsub(LuanState luan,String s,String pattern,Object repl,Integer n) throws LuanException { |
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150 Utils.checkNotNull(s); |
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151 int max = n==null ? Integer.MAX_VALUE : n; |
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152 final Matcher m = Pattern.compile(pattern).matcher(s); |
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153 if( repl instanceof String ) { |
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154 String replacement = (String)repl; |
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155 int i = 0; |
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156 StringBuffer sb = new StringBuffer(); |
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157 while( i<max && m.find() ) { |
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158 m.appendReplacement(sb,replacement); |
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159 i++; |
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160 } |
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161 m.appendTail(sb); |
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162 return new Object[]{ sb.toString(), i }; |
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163 } |
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164 if( repl instanceof LuanTable ) { |
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165 LuanTable t = (LuanTable)repl; |
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166 int i = 0; |
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167 StringBuffer sb = new StringBuffer(); |
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168 while( i<max && m.find() ) { |
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169 String match = m.groupCount()==0 ? m.group() : m.group(1); |
1267 | 170 Object val = t.get(match); |
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171 if( val != null ) { |
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172 String replacement = luan.toString(val); |
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173 m.appendReplacement(sb,replacement); |
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174 } |
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175 i++; |
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176 } |
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177 m.appendTail(sb); |
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178 return new Object[]{ sb.toString(), i }; |
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179 } |
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180 if( repl instanceof LuanFunction ) { |
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181 LuanFunction fn = (LuanFunction)repl; |
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182 int i = 0; |
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183 StringBuffer sb = new StringBuffer(); |
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184 while( i<max && m.find() ) { |
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185 Object[] args; |
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186 final int count = m.groupCount(); |
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187 if( count == 0 ) { |
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188 args = new String[]{m.group()}; |
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189 } else { |
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190 args = new String[count]; |
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191 for( int j=0; j<count; j++ ) { |
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192 args[j] = m.group(j+1); |
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193 } |
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194 } |
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195 Object val = Luan.first( fn.call(luan,args) ); |
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196 if( val != null ) { |
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197 String replacement = luan.toString(val); |
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198 m.appendReplacement(sb,replacement); |
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199 } |
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200 i++; |
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201 } |
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202 m.appendTail(sb); |
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203 return new Object[]{ sb.toString(), i }; |
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204 } |
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205 throw new LuanException( "bad argument #3 to 'gsub' (string/function/table expected)" ); |
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206 } |
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207 |
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208 // note - String.format() is too stupid to convert between ints and floats. |
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209 public static String format(String format,Object... args) { |
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210 return String.format(format,args); |
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211 } |
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212 |
289
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213 public static String concat(LuanState luan,Object... args) throws LuanException { |
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214 StringBuilder sb = new StringBuilder(); |
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215 for( Object arg : args ) { |
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216 sb.append( luan.toString(arg) ); |
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217 } |
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218 return sb.toString(); |
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219 } |
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220 |
420 | 221 public static String encode(String s) { |
222 return Luan.stringEncode(s); | |
223 } | |
224 | |
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225 public static Number to_number(String s,Integer base) throws LuanException { |
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226 Utils.checkNotNull(s); |
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227 try { |
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228 if( base == null ) { |
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229 return Double.valueOf(s); |
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230 } else { |
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231 return Long.valueOf(s,base); |
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232 } |
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233 } catch(NumberFormatException e) {} |
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234 return null; |
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235 } |
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236 |
702 | 237 public static boolean matches(String s,String pattern) throws LuanException { |
238 Utils.checkNotNull(s); | |
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239 return Pattern.compile(pattern).matcher(s).find(); |
456 | 240 } |
241 | |
1195 | 242 @LuanMethod public static String[] split(String s,String pattern,Integer limit) throws LuanException { |
757 | 243 Utils.checkNotNull(s); |
1195 | 244 int n = limit==null ? -1 : limit; |
245 return s.split(pattern,n); | |
757 | 246 } |
247 | |
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248 } |