UTF16.java
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/*
* Decompiled with CFR 0_118.
*/
package com.adobe.agl.text;
import com.adobe.agl.impl.UCharacterProperty;
public final class UTF16 {
private UTF16() {
}
public static int charAt(String source, int offset16) {
char single = source.charAt(offset16);
if (single < '\ud800') {
return single;
}
return UTF16._charAt(source, offset16, single);
}
private static int _charAt(String source, int offset16, char single) {
char lead;
if (single > '\udfff') {
return single;
}
if (single <= '\udbff') {
char trail;
if (source.length() != ++offset16 && (trail = source.charAt(offset16)) >= '\udc00' && trail <= '\udfff') {
return UCharacterProperty.getRawSupplementary(single, trail);
}
} else if (--offset16 >= 0 && (lead = source.charAt(offset16)) >= '\ud800' && lead <= '\udbff') {
return UCharacterProperty.getRawSupplementary(lead, single);
}
return single;
}
public static int charAt(StringBuffer source, int offset16) {
char lead;
if (offset16 < 0 || offset16 >= source.length()) {
throw new StringIndexOutOfBoundsException(offset16);
}
char single = source.charAt(offset16);
if (!UTF16.isSurrogate(single)) {
return single;
}
if (single <= '\udbff') {
char trail;
if (source.length() != ++offset16 && UTF16.isTrailSurrogate(trail = source.charAt(offset16))) {
return UCharacterProperty.getRawSupplementary(single, trail);
}
} else if (--offset16 >= 0 && UTF16.isLeadSurrogate(lead = source.charAt(offset16))) {
return UCharacterProperty.getRawSupplementary(lead, single);
}
return single;
}
public static int charAt(char[] source, int start, int limit, int offset16) {
if ((offset16 += start) < start || offset16 >= limit) {
throw new ArrayIndexOutOfBoundsException(offset16);
}
char single = source[offset16];
if (!UTF16.isSurrogate(single)) {
return single;
}
if (single <= '\udbff') {
if (++offset16 >= limit) {
return single;
}
char trail = source[offset16];
if (UTF16.isTrailSurrogate(trail)) {
return UCharacterProperty.getRawSupplementary(single, trail);
}
} else {
char lead;
if (offset16 == start) {
return single;
}
if (UTF16.isLeadSurrogate(lead = source[--offset16])) {
return UCharacterProperty.getRawSupplementary(lead, single);
}
}
return single;
}
public static int getCharCount(int char32) {
if (char32 < 65536) {
return 1;
}
return 2;
}
public static int bounds(String source, int offset16) {
char ch = source.charAt(offset16);
if (UTF16.isSurrogate(ch)) {
if (UTF16.isLeadSurrogate(ch)) {
if (++offset16 < source.length() && UTF16.isTrailSurrogate(source.charAt(offset16))) {
return 2;
}
} else if (--offset16 >= 0 && UTF16.isLeadSurrogate(source.charAt(offset16))) {
return 5;
}
}
return 1;
}
public static boolean isSurrogate(char char16) {
return (char16 & -2048) == 55296;
}
public static boolean isTrailSurrogate(char char16) {
return (char16 & -1024) == 56320;
}
public static boolean isLeadSurrogate(char char16) {
return (char16 & -1024) == 55296;
}
public static char getLeadSurrogate(int char32) {
if (char32 >= 65536) {
return (char)(55232 + (char32 >> 10));
}
return '\u0000';
}
public static char getTrailSurrogate(int char32) {
if (char32 >= 65536) {
return (char)(56320 + (char32 & 1023));
}
return (char)char32;
}
public static String valueOf(int char32) {
if (char32 < 0 || char32 > 1114111) {
throw new IllegalArgumentException("Illegal codepoint");
}
return UTF16.toString(char32);
}
public static String valueOf(String source, int offset16) {
switch (UTF16.bounds(source, offset16)) {
case 2: {
return source.substring(offset16, offset16 + 2);
}
case 5: {
return source.substring(offset16 - 1, offset16 + 1);
}
}
return source.substring(offset16, offset16 + 1);
}
public static int findOffsetFromCodePoint(String source, int offset32) {
int count;
int size = source.length();
int result = 0;
if (offset32 < 0 || offset32 > size) {
throw new StringIndexOutOfBoundsException(offset32);
}
for (count = offset32; result < size && count > 0; --count, ++result) {
char ch = source.charAt(result);
if (!UTF16.isLeadSurrogate(ch) || result + 1 >= size || !UTF16.isTrailSurrogate(source.charAt(result + 1))) continue;
++result;
}
if (count != 0) {
throw new StringIndexOutOfBoundsException(offset32);
}
return result;
}
public static int findCodePointOffset(String source, int offset16) {
if (offset16 < 0 || offset16 > source.length()) {
throw new StringIndexOutOfBoundsException(offset16);
}
int result = 0;
boolean hadLeadSurrogate = false;
for (int i = 0; i < offset16; ++i) {
char ch = source.charAt(i);
if (hadLeadSurrogate && UTF16.isTrailSurrogate(ch)) {
hadLeadSurrogate = false;
continue;
}
hadLeadSurrogate = UTF16.isLeadSurrogate(ch);
++result;
}
if (offset16 == source.length()) {
return result;
}
if (hadLeadSurrogate && UTF16.isTrailSurrogate(source.charAt(offset16))) {
--result;
}
return result;
}
public static StringBuffer append(StringBuffer target, int char32) {
if (char32 < 0 || char32 > 1114111) {
throw new IllegalArgumentException("Illegal codepoint: " + Integer.toHexString(char32));
}
if (char32 >= 65536) {
target.append(UTF16.getLeadSurrogate(char32));
target.append(UTF16.getTrailSurrogate(char32));
} else {
target.append((char)char32);
}
return target;
}
public static int append(char[] target, int limit, int char32) {
if (char32 < 0 || char32 > 1114111) {
throw new IllegalArgumentException("Illegal codepoint");
}
if (char32 >= 65536) {
target[limit++] = UTF16.getLeadSurrogate(char32);
target[limit++] = UTF16.getTrailSurrogate(char32);
} else {
target[limit++] = (char)char32;
}
return limit;
}
public static int countCodePoint(String source) {
if (source == null || source.length() == 0) {
return 0;
}
return UTF16.findCodePointOffset(source, source.length());
}
public static int moveCodePointOffset(String source, int offset16, int shift32) {
int count;
int result = offset16;
int size = source.length();
if (offset16 < 0 || offset16 > size) {
throw new StringIndexOutOfBoundsException(offset16);
}
if (shift32 > 0) {
if (shift32 + offset16 > size) {
throw new StringIndexOutOfBoundsException(offset16);
}
for (count = shift32; result < size && count > 0; --count, ++result) {
char ch = source.charAt(result);
if (!UTF16.isLeadSurrogate(ch) || result + 1 >= size || !UTF16.isTrailSurrogate(source.charAt(result + 1))) continue;
++result;
}
} else {
if (offset16 + shift32 < 0) {
throw new StringIndexOutOfBoundsException(offset16);
}
for (count = - shift32; count > 0 && --result >= 0; --count) {
char ch = source.charAt(result);
if (!UTF16.isTrailSurrogate(ch) || result <= 0 || !UTF16.isLeadSurrogate(source.charAt(result - 1))) continue;
--result;
}
}
if (count != 0) {
throw new StringIndexOutOfBoundsException(shift32);
}
return result;
}
private static String toString(int ch) {
if (ch < 65536) {
return String.valueOf((char)ch);
}
StringBuffer result = new StringBuffer();
result.append(UTF16.getLeadSurrogate(ch));
result.append(UTF16.getTrailSurrogate(ch));
return result.toString();
}
}