diff options
Diffstat (limited to 'thirdparty/icu4c/common/ucptrie_impl.h')
| -rw-r--r-- | thirdparty/icu4c/common/ucptrie_impl.h | 108 |
1 files changed, 52 insertions, 56 deletions
diff --git a/thirdparty/icu4c/common/ucptrie_impl.h b/thirdparty/icu4c/common/ucptrie_impl.h index 048353c80d..a7a80a8f08 100644 --- a/thirdparty/icu4c/common/ucptrie_impl.h +++ b/thirdparty/icu4c/common/ucptrie_impl.h @@ -54,80 +54,76 @@ struct UCPTrieHeader { uint16_t shiftedHighStart; }; +// Constants for use with UCPTrieHeader.options. +constexpr uint16_t UCPTRIE_OPTIONS_DATA_LENGTH_MASK = 0xf000; +constexpr uint16_t UCPTRIE_OPTIONS_DATA_NULL_OFFSET_MASK = 0xf00; +constexpr uint16_t UCPTRIE_OPTIONS_RESERVED_MASK = 0x38; +constexpr uint16_t UCPTRIE_OPTIONS_VALUE_BITS_MASK = 7; + /** - * Constants for use with UCPTrieHeader.options. - * @internal + * Value for index3NullOffset which indicates that there is no index-3 null block. + * Bit 15 is unused for this value because this bit is used if the index-3 contains + * 18-bit indexes. */ -enum { - UCPTRIE_OPTIONS_DATA_LENGTH_MASK = 0xf000, - UCPTRIE_OPTIONS_DATA_NULL_OFFSET_MASK = 0xf00, - UCPTRIE_OPTIONS_RESERVED_MASK = 0x38, - UCPTRIE_OPTIONS_VALUE_BITS_MASK = 7, - /** - * Value for index3NullOffset which indicates that there is no index-3 null block. - * Bit 15 is unused for this value because this bit is used if the index-3 contains - * 18-bit indexes. - */ - UCPTRIE_NO_INDEX3_NULL_OFFSET = 0x7fff, - UCPTRIE_NO_DATA_NULL_OFFSET = 0xfffff -}; +constexpr int32_t UCPTRIE_NO_INDEX3_NULL_OFFSET = 0x7fff; +constexpr int32_t UCPTRIE_NO_DATA_NULL_OFFSET = 0xfffff; // Internal constants. -enum { - /** The length of the BMP index table. 1024=0x400 */ - UCPTRIE_BMP_INDEX_LENGTH = 0x10000 >> UCPTRIE_FAST_SHIFT, - UCPTRIE_SMALL_LIMIT = 0x1000, - UCPTRIE_SMALL_INDEX_LENGTH = UCPTRIE_SMALL_LIMIT >> UCPTRIE_FAST_SHIFT, +/** The length of the BMP index table. 1024=0x400 */ +constexpr int32_t UCPTRIE_BMP_INDEX_LENGTH = 0x10000 >> UCPTRIE_FAST_SHIFT; - /** Shift size for getting the index-3 table offset. */ - UCPTRIE_SHIFT_3 = 4, +constexpr int32_t UCPTRIE_SMALL_LIMIT = 0x1000; +constexpr int32_t UCPTRIE_SMALL_INDEX_LENGTH = UCPTRIE_SMALL_LIMIT >> UCPTRIE_FAST_SHIFT; - /** Shift size for getting the index-2 table offset. */ - UCPTRIE_SHIFT_2 = 5 + UCPTRIE_SHIFT_3, +/** Shift size for getting the index-3 table offset. */ +constexpr int32_t UCPTRIE_SHIFT_3 = 4; - /** Shift size for getting the index-1 table offset. */ - UCPTRIE_SHIFT_1 = 5 + UCPTRIE_SHIFT_2, +/** Shift size for getting the index-2 table offset. */ +constexpr int32_t UCPTRIE_SHIFT_2 = 5 + UCPTRIE_SHIFT_3; - /** - * Difference between two shift sizes, - * for getting an index-2 offset from an index-3 offset. 5=9-4 - */ - UCPTRIE_SHIFT_2_3 = UCPTRIE_SHIFT_2 - UCPTRIE_SHIFT_3, +/** Shift size for getting the index-1 table offset. */ +constexpr int32_t UCPTRIE_SHIFT_1 = 5 + UCPTRIE_SHIFT_2; - /** - * Difference between two shift sizes, - * for getting an index-1 offset from an index-2 offset. 5=14-9 - */ - UCPTRIE_SHIFT_1_2 = UCPTRIE_SHIFT_1 - UCPTRIE_SHIFT_2, +/** + * Difference between two shift sizes, + * for getting an index-2 offset from an index-3 offset. 5=9-4 + */ +constexpr int32_t UCPTRIE_SHIFT_2_3 = UCPTRIE_SHIFT_2 - UCPTRIE_SHIFT_3; - /** - * Number of index-1 entries for the BMP. (4) - * This part of the index-1 table is omitted from the serialized form. - */ - UCPTRIE_OMITTED_BMP_INDEX_1_LENGTH = 0x10000 >> UCPTRIE_SHIFT_1, +/** + * Difference between two shift sizes, + * for getting an index-1 offset from an index-2 offset. 5=14-9 + */ +constexpr int32_t UCPTRIE_SHIFT_1_2 = UCPTRIE_SHIFT_1 - UCPTRIE_SHIFT_2; - /** Number of entries in an index-2 block. 32=0x20 */ - UCPTRIE_INDEX_2_BLOCK_LENGTH = 1 << UCPTRIE_SHIFT_1_2, +/** + * Number of index-1 entries for the BMP. (4) + * This part of the index-1 table is omitted from the serialized form. + */ +constexpr int32_t UCPTRIE_OMITTED_BMP_INDEX_1_LENGTH = 0x10000 >> UCPTRIE_SHIFT_1; - /** Mask for getting the lower bits for the in-index-2-block offset. */ - UCPTRIE_INDEX_2_MASK = UCPTRIE_INDEX_2_BLOCK_LENGTH - 1, +/** Number of entries in an index-2 block. 32=0x20 */ +constexpr int32_t UCPTRIE_INDEX_2_BLOCK_LENGTH = 1 << UCPTRIE_SHIFT_1_2; - /** Number of code points per index-2 table entry. 512=0x200 */ - UCPTRIE_CP_PER_INDEX_2_ENTRY = 1 << UCPTRIE_SHIFT_2, +/** Mask for getting the lower bits for the in-index-2-block offset. */ +constexpr int32_t UCPTRIE_INDEX_2_MASK = UCPTRIE_INDEX_2_BLOCK_LENGTH - 1; - /** Number of entries in an index-3 block. 32=0x20 */ - UCPTRIE_INDEX_3_BLOCK_LENGTH = 1 << UCPTRIE_SHIFT_2_3, +/** Number of code points per index-2 table entry. 512=0x200 */ +constexpr int32_t UCPTRIE_CP_PER_INDEX_2_ENTRY = 1 << UCPTRIE_SHIFT_2; - /** Mask for getting the lower bits for the in-index-3-block offset. */ - UCPTRIE_INDEX_3_MASK = UCPTRIE_INDEX_3_BLOCK_LENGTH - 1, +/** Number of entries in an index-3 block. 32=0x20 */ +constexpr int32_t UCPTRIE_INDEX_3_BLOCK_LENGTH = 1 << UCPTRIE_SHIFT_2_3; - /** Number of entries in a small data block. 16=0x10 */ - UCPTRIE_SMALL_DATA_BLOCK_LENGTH = 1 << UCPTRIE_SHIFT_3, +/** Mask for getting the lower bits for the in-index-3-block offset. */ +constexpr int32_t UCPTRIE_INDEX_3_MASK = UCPTRIE_INDEX_3_BLOCK_LENGTH - 1; + +/** Number of entries in a small data block. 16=0x10 */ +constexpr int32_t UCPTRIE_SMALL_DATA_BLOCK_LENGTH = 1 << UCPTRIE_SHIFT_3; + +/** Mask for getting the lower bits for the in-small-data-block offset. */ +constexpr int32_t UCPTRIE_SMALL_DATA_MASK = UCPTRIE_SMALL_DATA_BLOCK_LENGTH - 1; - /** Mask for getting the lower bits for the in-small-data-block offset. */ - UCPTRIE_SMALL_DATA_MASK = UCPTRIE_SMALL_DATA_BLOCK_LENGTH - 1 -}; typedef UChar32 UCPTrieGetRange(const void *trie, UChar32 start, |