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annotate src/luan/modules/StringLuan.java @ 1811:55d89a183c82 default tip

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remove line_diff from luan
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 15 May 2024 18:02:28 -0600
parents 90187946d1a4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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.security.NoSuchAlgorithmException;
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4 import java.util.Arrays;
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5 import java.util.List;
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6 import goodjava.util.GoodUtils;
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7 import goodjava.util.LineDiff;
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8 import luan.Luan;
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9 import luan.LuanTable;
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10 import luan.LuanFunction;
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11 import luan.LuanException;
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13
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ebe9db183eb7 rename *Lib.java to *Luan.java
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14 public final class StringLuan {
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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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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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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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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 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,0);
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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 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 repeated(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 public static Object[] find(String s,String s2,Integer init) {
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97 int start = start(s,init,0);
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98 int i = s.indexOf(s2,start);
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99 return i == -1 ? null : new Integer[]{i+1,i+s2.length()};
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100 }
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101
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102 // note - String.format() is too stupid to convert between ints and floats.
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103 public static String format(String format,Object... args) {
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104 return String.format(format,args);
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105 }
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106
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107 public static String encode(String s) {
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108 return Luan.stringEncode(s);
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109 }
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110
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111 public static Number to_number(String s,Integer base) throws LuanException {
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112 Utils.checkNotNull(s);
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113 try {
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114 if( base == null ) {
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115 return Double.valueOf(s);
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116 } else {
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117 return Long.valueOf(s,base);
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118 }
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119 } catch(NumberFormatException e) {}
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120 return null;
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121 }
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122
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123 public static String[] split(String s,String s2,Integer limit) throws LuanException {
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124 Utils.checkNotNull(s);
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125 Utils.checkNotNull(s2,2);
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126 int n = limit==null ? -1 : limit;
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127 return GoodUtils.split(s,s2,n);
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128 }
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129
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130 public static String digest_message(String algorithm,String input) throws LuanException, NoSuchAlgorithmException {
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131 Utils.checkNotNull(algorithm,1);
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132 Utils.checkNotNull(input,2);
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133 return BinaryLuan.to_hex( BinaryLuan.digest_message( algorithm, input.getBytes() ) );
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134 }
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135
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136 public static boolean contains(String s,String s2) throws LuanException {
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137 Utils.checkNotNull(s);
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138 Utils.checkNotNull(s2,2);
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139 return s.contains(s2);
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140 }
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141
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142 public static boolean starts_with(String s,String s2) throws LuanException {
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143 Utils.checkNotNull(s);
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144 Utils.checkNotNull(s2,2);
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145 return s.startsWith(s2);
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146 }
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147
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148 public static boolean ends_with(String s,String s2) throws LuanException {
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149 Utils.checkNotNull(s);
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150 Utils.checkNotNull(s2,2);
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151 return s.endsWith(s2);
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152 }
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153
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154 public static String replace(String s,String target,String replacement) throws LuanException {
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155 Utils.checkNotNull(s);
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156 Utils.checkNotNull(target,2);
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157 Utils.checkNotNull(replacement,3);
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158 return GoodUtils.replace(s,target,replacement);
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159 }
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160
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161 }