| // Copyright (c) 2017, the R8 project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| package com.android.tools.r8.utils; |
| |
| public class IdentifierUtils { |
| public static boolean isDexIdentifierStart(int cp) { |
| // Dex does not have special restrictions on the first char of an identifier. |
| return isDexIdentifierPart(cp); |
| } |
| |
| public static boolean isDexIdentifierPart(int cp) { |
| return isSimpleNameChar(cp); |
| } |
| |
| public static boolean isRelaxedDexIdentifierPart(int cp) { |
| return isSimpleNameChar(cp) |
| || isUnicodeSpace(cp); |
| } |
| |
| public static boolean isQuestionMark(int cp) { |
| return cp == '?'; |
| } |
| |
| public static boolean isUnicodeSpace(int cp) { |
| // Unicode 'Zs' category |
| return cp == ' ' |
| || cp == 0x00a0 |
| || cp == 0x1680 |
| || (0x2000 <= cp && cp <= 0x200a) |
| || cp == 0x202f |
| || cp == 0x205f |
| || cp == 0x3000; |
| } |
| |
| private static boolean isSimpleNameChar(int cp) { |
| // See https://source.android.com/devices/tech/dalvik/dex-format#string-syntax. |
| return ('A' <= cp && cp <= 'Z') |
| || ('a' <= cp && cp <= 'z') |
| || ('0' <= cp && cp <= '9') |
| || cp == '$' |
| || cp == '-' |
| || cp == '_' |
| || (0x00a1 <= cp && cp <= 0x1fff) |
| || (0x2010 <= cp && cp <= 0x2027) |
| || (0x2030 <= cp && cp <= 0xd7ff) |
| || (0xe000 <= cp && cp < 0xfeff) // Don't include BOM. |
| || (0xfeff < cp && cp <= 0xffef) |
| || (0x10000 <= cp && cp <= 0x10ffff); |
| } |
| } |