Marc Mintel
5397309103
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77 lines
3.3 KiB
Plaintext
77 lines
3.3 KiB
Plaintext
export declare type int = number;
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/** Shift size for getting the index-2 table offset. */
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export declare const UTRIE2_SHIFT_2 = 5;
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/** Shift size for getting the index-1 table offset. */
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export declare const UTRIE2_SHIFT_1: number;
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/**
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* Shift size for shifting left the index array values.
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* Increases possible data size with 16-bit index values at the cost
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* of compactability.
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* This requires data blocks to be aligned by UTRIE2_DATA_GRANULARITY.
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*/
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export declare const UTRIE2_INDEX_SHIFT = 2;
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/**
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* Difference between the two shift sizes,
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* for getting an index-1 offset from an index-2 offset. 6=11-5
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*/
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export declare const UTRIE2_SHIFT_1_2: number;
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/**
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* The part of the index-2 table for U+D800..U+DBFF stores values for
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* lead surrogate code _units_ not code _points_.
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* Values for lead surrogate code _points_ are indexed with this portion of the table.
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* Length=32=0x20=0x400>>UTRIE2_SHIFT_2. (There are 1024=0x400 lead surrogates.)
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*/
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export declare const UTRIE2_LSCP_INDEX_2_OFFSET: number;
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/** Number of entries in a data block. 32=0x20 */
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export declare const UTRIE2_DATA_BLOCK_LENGTH: number;
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/** Mask for getting the lower bits for the in-data-block offset. */
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export declare const UTRIE2_DATA_MASK: number;
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export declare const UTRIE2_LSCP_INDEX_2_LENGTH: number;
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/** Count the lengths of both BMP pieces. 2080=0x820 */
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export declare const UTRIE2_INDEX_2_BMP_LENGTH: number;
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/**
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* The 2-byte UTF-8 version of the index-2 table follows at offset 2080=0x820.
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* Length 32=0x20 for lead bytes C0..DF, regardless of UTRIE2_SHIFT_2.
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*/
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export declare const UTRIE2_UTF8_2B_INDEX_2_OFFSET: number;
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export declare const UTRIE2_UTF8_2B_INDEX_2_LENGTH: number;
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/**
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* The index-1 table, only used for supplementary code points, at offset 2112=0x840.
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* Variable length, for code points up to highStart, where the last single-value range starts.
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* Maximum length 512=0x200=0x100000>>UTRIE2_SHIFT_1.
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* (For 0x100000 supplementary code points U+10000..U+10ffff.)
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*
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* The part of the index-2 table for supplementary code points starts
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* after this index-1 table.
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*
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* Both the index-1 table and the following part of the index-2 table
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* are omitted completely if there is only BMP data.
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*/
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export declare const UTRIE2_INDEX_1_OFFSET: number;
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/**
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* Number of index-1 entries for the BMP. 32=0x20
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* This part of the index-1 table is omitted from the serialized form.
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*/
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export declare const UTRIE2_OMITTED_BMP_INDEX_1_LENGTH: number;
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/** Number of entries in an index-2 block. 64=0x40 */
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export declare const UTRIE2_INDEX_2_BLOCK_LENGTH: number;
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/** Mask for getting the lower bits for the in-index-2-block offset. */
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export declare const UTRIE2_INDEX_2_MASK: number;
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export declare const createTrieFromBase64: (base64: string, _byteLength: number) => Trie;
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export declare class Trie {
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initialValue: int;
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errorValue: int;
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highStart: int;
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highValueIndex: int;
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index: Uint16Array | number[];
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data: Uint32Array | Uint16Array | number[];
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constructor(initialValue: int, errorValue: int, highStart: int, highValueIndex: int, index: Uint16Array | number[], data: Uint32Array | Uint16Array | number[]);
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/**
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* Get the value for a code point as stored in the Trie.
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*
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* @param codePoint the code point
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* @return the value
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*/
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get(codePoint: number): number;
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}
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