11cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta/* 21cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * Copyright (C) 2013 The Android Open Source Project 31cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * 41cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * Licensed under the Apache License, Version 2.0 (the "License"); 51cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * you may not use this file except in compliance with the License. 61cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * You may obtain a copy of the License at 71cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * 81cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * http://www.apache.org/licenses/LICENSE-2.0 91cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * 101cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * Unless required by applicable law or agreed to in writing, software 111cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * distributed under the License is distributed on an "AS IS" BASIS, 121cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 131cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * See the License for the specific language governing permissions and 141cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * limitations under the License. 151cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta */ 161cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta 171cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Guptapackage com.android.tools.layoutlib.java; 181cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta 191cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Guptaimport java.nio.CharBuffer; 201cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Guptaimport java.nio.charset.Charset; 211cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta 221cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta/** 231cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * Defines the same class as the java.nio.charset.Charsets which was added in 241cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * Dalvik VM. This hack, provides a replacement for that class which can't be 251cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * loaded in the standard JVM since it's in the java package and standard JVM 261cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * doesn't have it. An implementation of the native methods in the original 271cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * class has been added. 281cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * <p/> 291cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * Extracted from API level 18, file: 301cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * platform/libcore/luni/src/main/java/java/nio/charset/Charsets 311cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta */ 321cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Guptapublic final class Charsets { 331cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta /** 341cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * A cheap and type-safe constant for the ISO-8859-1 Charset. 351cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta */ 361cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta public static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1"); 371cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta 381cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta /** 391cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * A cheap and type-safe constant for the US-ASCII Charset. 401cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta */ 411cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta public static final Charset US_ASCII = Charset.forName("US-ASCII"); 421cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta 431cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta /** 441cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * A cheap and type-safe constant for the UTF-8 Charset. 451cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta */ 461cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta public static final Charset UTF_8 = Charset.forName("UTF-8"); 471cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta 481cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta /** 491cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * Returns a new byte array containing the bytes corresponding to the given characters, 501cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * encoded in US-ASCII. Unrepresentable characters are replaced by (byte) '?'. 511cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta */ 521cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta public static byte[] toAsciiBytes(char[] chars, int offset, int length) { 531cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta CharBuffer cb = CharBuffer.allocate(length); 541cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta cb.put(chars, offset, length); 551cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta return US_ASCII.encode(cb).array(); 561cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta } 571cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta 581cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta /** 591cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * Returns a new byte array containing the bytes corresponding to the given characters, 601cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * encoded in ISO-8859-1. Unrepresentable characters are replaced by (byte) '?'. 611cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta */ 621cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta public static byte[] toIsoLatin1Bytes(char[] chars, int offset, int length) { 631cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta CharBuffer cb = CharBuffer.allocate(length); 641cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta cb.put(chars, offset, length); 651cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta return ISO_8859_1.encode(cb).array(); 661cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta } 671cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta 681cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta /** 691cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * Returns a new byte array containing the bytes corresponding to the given characters, 701cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * encoded in UTF-8. All characters are representable in UTF-8. 711cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta */ 721cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta public static byte[] toUtf8Bytes(char[] chars, int offset, int length) { 731cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta CharBuffer cb = CharBuffer.allocate(length); 741cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta cb.put(chars, offset, length); 751cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta return UTF_8.encode(cb).array(); 761cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta } 771cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta 781cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta /** 791cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * Returns a new byte array containing the bytes corresponding to the given characters, 801cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * encoded in UTF-16BE. All characters are representable in UTF-16BE. 811cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta */ 821cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta public static byte[] toBigEndianUtf16Bytes(char[] chars, int offset, int length) { 831cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta byte[] result = new byte[length * 2]; 841cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta int end = offset + length; 851cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta int resultIndex = 0; 861cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta for (int i = offset; i < end; ++i) { 871cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta char ch = chars[i]; 881cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta result[resultIndex++] = (byte) (ch >> 8); 891cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta result[resultIndex++] = (byte) ch; 901cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta } 911cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta return result; 921cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta } 931cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta 941cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta /** 951cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * Decodes the given US-ASCII bytes into the given char[]. Equivalent to but faster than: 961cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * 971cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * for (int i = 0; i < count; ++i) { 981cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * char ch = (char) (data[start++] & 0xff); 991cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * value[i] = (ch <= 0x7f) ? ch : REPLACEMENT_CHAR; 1001cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * } 1011cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta */ 1021cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta public static void asciiBytesToChars(byte[] bytes, int offset, int length, char[] chars) { 1031cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta if (bytes == null || chars == null) { 1041cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta return; 1051cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta } 1061cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta final char REPLACEMENT_CHAR = (char)0xffd; 1071cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta int start = offset; 1081cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta for (int i = 0; i < length; ++i) { 1091cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta char ch = (char) (bytes[start++] & 0xff); 1101cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta chars[i] = (ch <= 0x7f) ? ch : REPLACEMENT_CHAR; 1111cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta } 1121cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta } 1131cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta 1141cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta /** 1151cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * Decodes the given ISO-8859-1 bytes into the given char[]. Equivalent to but faster than: 1161cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * 1171cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * for (int i = 0; i < count; ++i) { 1181cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * value[i] = (char) (data[start++] & 0xff); 1191cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta * } 1201cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta */ 1211cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta public static void isoLatin1BytesToChars(byte[] bytes, int offset, int length, char[] chars) { 1221cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta if (bytes == null || chars == null) { 1231cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta return; 1241cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta } 1251cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta int start = offset; 1261cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta for (int i = 0; i < length; ++i) { 1271cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta chars[i] = (char) (bytes[start++] & 0xff); 1281cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta } 1291cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta } 1301cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta 1311cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta private Charsets() { 1321cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta } 1331cf5df38f4bdafa1beb2674ca548ad6d9650766bDeepanshu Gupta} 134