Mercurial Hosting > luan
annotate core/src/luan/modules/StringLuan.java @ 539:473e456444ff
Remove object-oriented primitive methods for string and binary
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Mon, 01 Jun 2015 17:53:55 -0600 |
parents | e3fb9768dbb3 |
children | f4dfe9c64c25 |
rev | line source |
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167
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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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14 |
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15 |
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16 public final class StringLuan { |
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17 |
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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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22 |
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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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26 |
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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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31 |
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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[] string_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 int len(LuanState luan,String s) throws LuanException { |
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60 Utils.checkNotNull(luan,s); |
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61 return s.length(); |
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62 } |
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63 |
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64 public static String lower(LuanState luan,String s) throws LuanException { |
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65 Utils.checkNotNull(luan,s); |
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66 return s.toLowerCase(); |
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67 } |
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68 |
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69 public static String upper(LuanState luan,String s) throws LuanException { |
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70 Utils.checkNotNull(luan,s); |
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71 return s.toUpperCase(); |
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72 } |
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73 |
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74 public static String trim(LuanState luan,String s) throws LuanException { |
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75 Utils.checkNotNull(luan,s); |
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76 return s.trim(); |
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77 } |
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78 |
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79 public static String reverse(LuanState luan,String s) throws LuanException { |
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80 Utils.checkNotNull(luan,s); |
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81 return new StringBuilder(s).reverse().toString(); |
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82 } |
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83 |
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84 public static String rep(String s,int n,String sep) { |
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85 if( n < 1 ) |
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86 return ""; |
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87 StringBuilder buf = new StringBuilder(s); |
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88 while( --n > 0 ) { |
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89 if( sep != null ) |
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90 buf.append(sep); |
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91 buf.append(s); |
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92 } |
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93 return buf.toString(); |
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94 } |
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95 |
251
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96 public static String sub(LuanState luan,String s,int i,Integer j) throws LuanException { |
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97 Utils.checkNotNull(luan,s); |
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98 int start = start(s,i); |
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99 int end = end(s,j,s.length()); |
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100 return s.substring(start,end); |
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101 } |
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102 |
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103 public static int[] find(String s,String pattern,Integer init,Boolean plain) { |
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104 int start = start(s,init,0); |
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105 if( Boolean.TRUE.equals(plain) ) { |
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106 int i = s.indexOf(pattern,start); |
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107 return i == -1 ? null : new int[]{i+1,i+pattern.length()}; |
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108 } |
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109 Matcher m = Pattern.compile(pattern).matcher(s); |
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110 return m.find(start) ? new int[]{m.start()+1,m.end()} : null; |
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111 } |
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112 |
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113 @LuanMethod public static String[] match(String s,String pattern,Integer init) { |
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114 int start = start(s,init,0); |
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115 Matcher m = Pattern.compile(pattern).matcher(s); |
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116 if( !m.find(start) ) |
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117 return null; |
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118 final int n = m.groupCount(); |
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119 if( n == 0 ) |
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120 return new String[]{m.group()}; |
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121 String[] rtn = new String[n]; |
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122 for( int i=0; i<n; i++ ) { |
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123 rtn[i] = m.group(i+1); |
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124 } |
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125 return rtn; |
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126 } |
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127 |
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128 public static LuanFunction gmatch(LuanState luan,String s,String pattern) throws LuanException { |
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129 Utils.checkNotNull(luan,s); |
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130 final Matcher m = Pattern.compile(pattern).matcher(s); |
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131 return new LuanFunction() { |
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132 @Override public Object call(LuanState luan,Object[] args) { |
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133 if( !m.find() ) |
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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 m.group(); |
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138 String[] rtn = new String[n]; |
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139 for( int i=0; i<n; i++ ) { |
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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 } |
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146 |
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147 @LuanMethod public static Object[] gsub(LuanState luan,String s,String pattern,Object repl,Integer n) throws LuanException { |
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148 int max = n==null ? Integer.MAX_VALUE : n; |
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149 final Matcher m = Pattern.compile(pattern).matcher(s); |
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150 if( repl instanceof String ) { |
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151 String replacement = (String)repl; |
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152 int i = 0; |
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153 StringBuffer sb = new StringBuffer(); |
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154 while( i<max && m.find() ) { |
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155 m.appendReplacement(sb,replacement); |
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156 i++; |
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157 } |
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158 m.appendTail(sb); |
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159 return new Object[]{ sb.toString(), i }; |
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160 } |
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161 if( repl instanceof LuanTable ) { |
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162 LuanTable t = (LuanTable)repl; |
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163 int i = 0; |
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164 StringBuffer sb = new StringBuffer(); |
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165 while( i<max && m.find() ) { |
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166 String match = m.groupCount()==0 ? m.group() : m.group(1); |
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167 Object val = t.get(luan,match); |
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168 if( val != null ) { |
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169 String replacement = luan.checkString(val); |
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170 if( replacement==null ) |
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171 throw luan.exception( "invalid replacement value (a "+Luan.type(val)+")" ); |
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172 m.appendReplacement(sb,replacement); |
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173 } |
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174 i++; |
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175 } |
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176 m.appendTail(sb); |
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177 return new Object[]{ sb.toString(), i }; |
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178 } |
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179 if( repl instanceof LuanFunction ) { |
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180 LuanFunction fn = (LuanFunction)repl; |
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181 int i = 0; |
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182 StringBuffer sb = new StringBuffer(); |
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183 while( i<max && m.find() ) { |
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184 Object[] args; |
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185 final int count = m.groupCount(); |
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186 if( count == 0 ) { |
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187 args = new Object[]{m.group()}; |
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188 } else { |
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189 args = new Object[count]; |
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190 for( int j=0; j<count; j++ ) { |
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191 args[j] = m.group(j); |
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192 } |
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193 } |
130
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194 Object val = Luan.first( luan.call(fn,"repl-arg",args) ); |
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195 if( val != null ) { |
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196 String replacement = luan.checkString(val); |
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197 if( replacement==null ) |
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198 throw luan.exception( "invalid replacement value (a "+Luan.type(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 |
289
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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.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 |
420 | 222 public static String encode(String s) { |
223 return Luan.stringEncode(s); | |
224 } | |
225 | |
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226 public static Number string_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 |
456 | 238 public static boolean matches(String s,String pattern) { |
239 return s.matches(pattern); | |
240 } | |
241 | |
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242 } |