196e320734
Remove some utility functions for discovering character data that ICU probably took over a while ago. Change-Id: I97abe4de2f51eb2bf48679941258bc501184c3dc
129 lines
4.5 KiB
C++
129 lines
4.5 KiB
C++
/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//
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#ifndef ANDROID_UNICODE_H
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#define ANDROID_UNICODE_H
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#include <stdint.h>
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#include <sys/types.h>
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#define REPLACEMENT_CHAR (0xFFFD)
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// this part of code is copied from umachine.h under ICU
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/**
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* Define UChar32 as a type for single Unicode code points.
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* UChar32 is a signed 32-bit integer (same as int32_t).
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*
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* The Unicode code point range is 0..0x10ffff.
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* All other values (negative or >=0x110000) are illegal as Unicode code points.
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* They may be used as sentinel values to indicate "done", "error"
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* or similar non-code point conditions.
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*
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* @stable ICU 2.4
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*/
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typedef int32_t UChar32;
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namespace android {
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class Encoding;
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/**
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* \class Unicode
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*
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* Helper class for getting properties of Unicode characters. Characters
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* can have one of the types listed in CharType and each character can have the
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* directionality of Direction.
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*/
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class Unicode
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{
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public:
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/**
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* Directions specified in the Unicode standard. These directions map directly
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* to java.lang.Character.
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*/
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enum Direction {
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DIRECTIONALITY_UNDEFINED = -1,
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DIRECTIONALITY_LEFT_TO_RIGHT,
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DIRECTIONALITY_RIGHT_TO_LEFT,
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DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC,
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DIRECTIONALITY_EUROPEAN_NUMBER,
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DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR,
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DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR,
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DIRECTIONALITY_ARABIC_NUMBER,
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DIRECTIONALITY_COMMON_NUMBER_SEPARATOR,
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DIRECTIONALITY_NONSPACING_MARK,
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DIRECTIONALITY_BOUNDARY_NEUTRAL,
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DIRECTIONALITY_PARAGRAPH_SEPARATOR,
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DIRECTIONALITY_SEGMENT_SEPARATOR,
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DIRECTIONALITY_WHITESPACE,
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DIRECTIONALITY_OTHER_NEUTRALS,
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DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING,
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DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE,
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DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING,
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DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE,
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DIRECTIONALITY_POP_DIRECTIONAL_FORMAT
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};
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/**
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* Returns the packed data for java calls
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* @param c The unicode character.
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* @return The packed data for the character.
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*
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* Copied from java.lang.Character implementation:
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* 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
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* F E D C B A 9 8 7 6 5 4 3 2 1 0 F E D C B A 9 8 7 6 5 4 3 2 1 0
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*
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* 31 types ---------
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* 18 directionalities ---------
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* 2 mirroreds -
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* ----------- 56 toupper diffs
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* ----------- 48 tolower diffs
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* --- 4 totitlecase diffs
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* ------------- 84 numeric values
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* --------- 24 mirror char diffs
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*/
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static uint32_t getPackedData(UChar32 c);
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/**
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* Get the directionality of the character.
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* @param c The unicode character.
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* @return The direction of the character or DIRECTIONALITY_UNDEFINED.
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*/
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static Direction getDirectionality(UChar32 c);
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/**
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* Check if the character is a mirrored character. This means that the character
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* has an equivalent character that is the mirror image of itself.
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* @param c The unicode character.
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* @return True iff c has a mirror equivalent.
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*/
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static bool isMirrored(UChar32 c);
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/**
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* Return the mirror of the given character.
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* @param c The unicode character.
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* @return The mirror equivalent of c. If c does not have a mirror equivalent,
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* the original character is returned.
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* @see isMirrored
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*/
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static UChar32 toMirror(UChar32 c);
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};
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}
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#endif
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