1 /* GENERATED SOURCE. DO NOT MODIFY. */ 2 // 2016 and later: Unicode, Inc. and others. 3 // License & terms of use: http://www.unicode.org/copyright.html#License 4 /* 5 ******************************************************************************* 6 * Copyright (C) 2002-2010, International Business Machines 7 * Corporation and others. All Rights Reserved. 8 ******************************************************************************* 9 */ 10 11 package android.icu.impl; 12 /** 13 * @version 1.1 14 * @author Markus W. Scherer 15 * Ram: Add documentation, remove unwanted methods, improve coverage. 16 */ 17 18 /** 19 * Simple class for handling serialized USet/UnicodeSet structures 20 * without object creation. See ICU4C icu/source/common/uset.c. 21 * 22 * @hide Only a subset of ICU is exposed in Android 23 * @hide draft / provisional / internal are hidden on Android 24 */ 25 public final class USerializedSet { 26 /** 27 * Fill in the given serialized set object. 28 * @param src pointer to start of array 29 * @param srcStart pointer to start of serialized data (length value) 30 * @return true if the given array is valid, otherwise false 31 */ 32 public final boolean getSet(char src[], int srcStart) { 33 // leave most argument checking up to Java exceptions 34 array=null; 35 arrayOffset=bmpLength=length=0; 36 37 length=src[srcStart++]; 38 39 if ((length&0x8000) != 0) { 40 /* there are supplementary values */ 41 length&=0x7fff; 42 if(src.length<(srcStart+1+length)) { 43 length=0; 44 throw new IndexOutOfBoundsException(); 45 } 46 bmpLength=src[srcStart++]; 47 } else { 48 /* only BMP values */ 49 if(src.length<(srcStart+length)) { 50 length=0; 51 throw new IndexOutOfBoundsException(); 52 } 53 bmpLength=length; 54 } 55 array = new char[length]; 56 System.arraycopy(src,srcStart,array,0,length); 57 //arrayOffset=srcStart; 58 return true; 59 } 60 61 /** 62 * Set the USerializedSet to contain the given character (and nothing 63 * else). 64 */ 65 public final void setToOne(int c) { 66 if( 0x10ffff<c) { 67 return; 68 } 69 70 if(c<0xffff) { 71 bmpLength=length=2; 72 array[0]=(char)c; 73 array[1]=(char)(c+1); 74 } else if(c==0xffff) { 75 bmpLength=1; 76 length=3; 77 array[0]=0xffff; 78 array[1]=1; 79 array[2]=0; 80 } else if(c<0x10ffff) { 81 bmpLength=0; 82 length=4; 83 array[0]=(char)(c>>16); 84 array[1]=(char)c; 85 ++c; 86 array[2]=(char)(c>>16); 87 array[3]=(char)c; 88 } else /* c==0x10ffff */ { 89 bmpLength=0; 90 length=2; 91 array[0]=0x10; 92 array[1]=0xffff; 93 } 94 } 95 96 /** 97 * Returns a range of characters contained in the given serialized 98 * set. 99 * @param rangeIndex a non-negative integer in the range <code>0.. 100 * getSerializedRangeCount()-1</code> 101 * @param range variable to receive the data in the range 102 * @return true if rangeIndex is valid, otherwise false 103 */ 104 public final boolean getRange(int rangeIndex, int[] range) { 105 if( rangeIndex<0) { 106 return false; 107 } 108 if(array==null){ 109 array = new char[8]; 110 } 111 if(range==null || range.length <2){ 112 throw new IllegalArgumentException(); 113 } 114 rangeIndex*=2; /* address start/limit pairs */ 115 if(rangeIndex<bmpLength) { 116 range[0]=array[rangeIndex++]; 117 if(rangeIndex<bmpLength) { 118 range[1]=array[rangeIndex]-1; 119 } else if(rangeIndex<length) { 120 range[1]=((((int)array[rangeIndex])<<16)|array[rangeIndex+1])-1; 121 } else { 122 range[1]=0x10ffff; 123 } 124 return true; 125 } else { 126 rangeIndex-=bmpLength; 127 rangeIndex*=2; /* address pairs of pairs of units */ 128 int suppLength=length-bmpLength; 129 if(rangeIndex<suppLength) { 130 int offset=arrayOffset+bmpLength; 131 range[0]=(((int)array[offset+rangeIndex])<<16)|array[offset+rangeIndex+1]; 132 rangeIndex+=2; 133 if(rangeIndex<suppLength) { 134 range[1]=((((int)array[offset+rangeIndex])<<16)|array[offset+rangeIndex+1])-1; 135 } else { 136 range[1]=0x10ffff; 137 } 138 return true; 139 } else { 140 return false; 141 } 142 } 143 } 144 145 /** 146 * Returns true if the given USerializedSet contains the given 147 * character. 148 * @param c the character to test for 149 * @return true if set contains c 150 */ 151 public final boolean contains(int c) { 152 153 if(c>0x10ffff) { 154 return false; 155 } 156 157 if(c<=0xffff) { 158 int i; 159 /* find c in the BMP part */ 160 for(i=0; i<bmpLength && (char)c>=array[i]; ++i) {} 161 return ((i&1) != 0); 162 } else { 163 int i; 164 /* find c in the supplementary part */ 165 char high=(char)(c>>16), low=(char)c; 166 for(i=bmpLength; 167 i<length && (high>array[i] || (high==array[i] && low>=array[i+1])); 168 i+=2) {} 169 170 /* count pairs of 16-bit units even per BMP and check if the number of pairs is odd */ 171 return (((i+bmpLength)&2)!=0); 172 } 173 } 174 175 /** 176 * Returns the number of disjoint ranges of characters contained in 177 * the given serialized set. Ignores any strings contained in the 178 * set. 179 * @return a non-negative integer counting the character ranges 180 * contained in set 181 */ 182 public final int countRanges() { 183 return (bmpLength+(length-bmpLength)/2+1)/2; 184 } 185 186 private char array[] = new char[8]; 187 private int arrayOffset, bmpLength, length; 188 } 189
