diff options
Diffstat (limited to 'libs/utils/Unicode.cpp')
-rw-r--r-- | libs/utils/Unicode.cpp | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/libs/utils/Unicode.cpp b/libs/utils/Unicode.cpp deleted file mode 100644 index 33f535f..0000000 --- a/libs/utils/Unicode.cpp +++ /dev/null @@ -1,193 +0,0 @@ -/* - * Copyright (C) 2008 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include "utils/AndroidUnicode.h" -#include "characterData.h" - -#define LOG_TAG "Unicode" -#include "utils/Log.h" - -// ICU headers for using macros -#include <unicode/utf16.h> - -#define MIN_RADIX 2 -#define MAX_RADIX 36 - -#define TYPE_SHIFT 0 -#define TYPE_MASK ((1<<5)-1) - -#define DIRECTION_SHIFT (TYPE_SHIFT+5) -#define DIRECTION_MASK ((1<<5)-1) - -#define MIRRORED_SHIFT (DIRECTION_SHIFT+5) -#define MIRRORED_MASK ((1<<1)-1) - -#define TOUPPER_SHIFT (MIRRORED_SHIFT+1) -#define TOUPPER_MASK ((1<<6)-1) - -#define TOLOWER_SHIFT (TOUPPER_SHIFT+6) -#define TOLOWER_MASK ((1<<6)-1) - -#define TOTITLE_SHIFT (TOLOWER_SHIFT+6) -#define TOTITLE_MASK ((1<<2)-1) - -#define MIRROR_SHIFT (TOTITLE_SHIFT+2) -#define MIRROR_MASK ((1<<5)-1) - -#define NUMERIC_SHIFT (TOTITLE_SHIFT+2) -#define NUMERIC_MASK ((1<<7)-1) - -#define DECOMPOSITION_SHIFT (11) -#define DECOMPOSITION_MASK ((1<<5)-1) - -/* - * Returns the value stored in the CharacterData tables that contains - * an index into the packed data table and the decomposition type. - */ -static uint16_t findCharacterValue(UChar32 c) -{ - LOG_ASSERT(c >= 0 && c <= 0x10FFFF, "findCharacterValue received an invalid codepoint"); - if (c < 256) - return CharacterData::LATIN1_DATA[c]; - - // Rotate the bits because the tables are separated into even and odd codepoints - c = (c >> 1) | ((c & 1) << 20); - - CharacterData::Range search = CharacterData::FULL_DATA[c >> 16]; - const uint32_t* array = search.array; - - // This trick is so that that compare in the while loop does not - // need to shift the array entry down by 16 - c <<= 16; - c |= 0xFFFF; - - int high = (int)search.length - 1; - int low = 0; - - if (high < 0) - return 0; - - while (low < high - 1) - { - int probe = (high + low) >> 1; - - // The entries contain the codepoint in the high 16 bits and the index - // into PACKED_DATA in the low 16. - if (array[probe] > (unsigned)c) - high = probe; - else - low = probe; - } - - LOG_ASSERT((array[low] <= (unsigned)c), "A suitable range was not found"); - return array[low] & 0xFFFF; -} - -uint32_t android::Unicode::getPackedData(UChar32 c) -{ - // findCharacterValue returns a 16-bit value with the top 5 bits containing a decomposition type - // and the remaining bits containing an index. - return CharacterData::PACKED_DATA[findCharacterValue(c) & 0x7FF]; -} - -android::Unicode::CharType android::Unicode::getType(UChar32 c) -{ - if (c < 0 || c >= 0x10FFFF) - return CHARTYPE_UNASSIGNED; - return (CharType)((getPackedData(c) >> TYPE_SHIFT) & TYPE_MASK); -} - -android::Unicode::DecompositionType android::Unicode::getDecompositionType(UChar32 c) -{ - // findCharacterValue returns a 16-bit value with the top 5 bits containing a decomposition type - // and the remaining bits containing an index. - return (DecompositionType)((findCharacterValue(c) >> DECOMPOSITION_SHIFT) & DECOMPOSITION_MASK); -} - -int android::Unicode::getDigitValue(UChar32 c, int radix) -{ - if (radix < MIN_RADIX || radix > MAX_RADIX) - return -1; - - int tempValue = radix; - - if (c >= '0' && c <= '9') - tempValue = c - '0'; - else if (c >= 'a' && c <= 'z') - tempValue = c - 'a' + 10; - else if (c >= 'A' && c <= 'Z') - tempValue = c - 'A' + 10; - - return tempValue < radix ? tempValue : -1; -} - -int android::Unicode::getNumericValue(UChar32 c) -{ - if (isMirrored(c)) - return -1; - - return (int) CharacterData::NUMERICS[((getPackedData(c) >> NUMERIC_SHIFT) & NUMERIC_MASK)]; -} - -UChar32 android::Unicode::toLower(UChar32 c) -{ - return c + CharacterData::LCDIFF[(getPackedData(c) >> TOLOWER_SHIFT) & TOLOWER_MASK]; -} - -UChar32 android::Unicode::toUpper(UChar32 c) -{ - return c + CharacterData::UCDIFF[(getPackedData(c) >> TOUPPER_SHIFT) & TOUPPER_MASK]; -} - -android::Unicode::Direction android::Unicode::getDirectionality(UChar32 c) -{ - uint32_t data = getPackedData(c); - - if (0 == data) - return DIRECTIONALITY_UNDEFINED; - - Direction d = (Direction) ((data >> DIRECTION_SHIFT) & DIRECTION_MASK); - - if (DIRECTION_MASK == d) - return DIRECTIONALITY_UNDEFINED; - - return d; -} - -bool android::Unicode::isMirrored(UChar32 c) -{ - return ((getPackedData(c) >> MIRRORED_SHIFT) & MIRRORED_MASK) != 0; -} - -UChar32 android::Unicode::toMirror(UChar32 c) -{ - if (!isMirrored(c)) - return c; - - return c + CharacterData::MIRROR_DIFF[(getPackedData(c) >> MIRROR_SHIFT) & MIRROR_MASK]; -} - -UChar32 android::Unicode::toTitle(UChar32 c) -{ - int32_t diff = CharacterData::TCDIFF[(getPackedData(c) >> TOTITLE_SHIFT) & TOTITLE_MASK]; - - if (TOTITLE_MASK == diff) - return toUpper(c); - - return c + diff; -} - - |