888 lines
39 KiB
JavaScript
888 lines
39 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.serializeBase64 = exports.TrieBuilder = exports.BITS_32 = exports.BITS_16 = void 0;
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var Trie_1 = require("./Trie");
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var base64_arraybuffer_1 = require("base64-arraybuffer");
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/**
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* Trie2 constants, defining shift widths, index array lengths, etc.
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*
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* These are needed for the runtime macros but users can treat these as
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* implementation details and skip to the actual public API further below.
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*/
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// const UTRIE2_OPTIONS_VALUE_BITS_MASK = 0x000f;
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/** Number of code points per index-1 table entry. 2048=0x800 */
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var UTRIE2_CP_PER_INDEX_1_ENTRY = 1 << Trie_1.UTRIE2_SHIFT_1;
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/** The alignment size of a data block. Also the granularity for compaction. */
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var UTRIE2_DATA_GRANULARITY = 1 << Trie_1.UTRIE2_INDEX_SHIFT;
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/* Fixed layout of the first part of the index array. ------------------- */
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/**
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* The BMP part of the index-2 table is fixed and linear and starts at offset 0.
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* Length=2048=0x800=0x10000>>UTRIE2_SHIFT_2.
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*/
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var UTRIE2_INDEX_2_OFFSET = 0;
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var UTRIE2_MAX_INDEX_1_LENGTH = 0x100000 >> Trie_1.UTRIE2_SHIFT_1;
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/*
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* Fixed layout of the first part of the data array. -----------------------
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* Starts with 4 blocks (128=0x80 entries) for ASCII.
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*/
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/**
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* The illegal-UTF-8 data block follows the ASCII block, at offset 128=0x80.
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* Used with linear access for single bytes 0..0xbf for simple error handling.
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* Length 64=0x40, not UTRIE2_DATA_BLOCK_LENGTH.
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*/
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var UTRIE2_BAD_UTF8_DATA_OFFSET = 0x80;
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/** The start of non-linear-ASCII data blocks, at offset 192=0xc0. */
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var UTRIE2_DATA_START_OFFSET = 0xc0;
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/* Building a Trie2 ---------------------------------------------------------- */
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/*
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* These definitions are mostly needed by utrie2_builder.c, but also by
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* utrie2_get32() and utrie2_enum().
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*/
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/*
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* At build time, leave a gap in the index-2 table,
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* at least as long as the maximum lengths of the 2-byte UTF-8 index-2 table
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* and the supplementary index-1 table.
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* Round up to UTRIE2_INDEX_2_BLOCK_LENGTH for proper compacting.
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*/
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var UNEWTRIE2_INDEX_GAP_OFFSET = Trie_1.UTRIE2_INDEX_2_BMP_LENGTH;
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var UNEWTRIE2_INDEX_GAP_LENGTH = (Trie_1.UTRIE2_UTF8_2B_INDEX_2_LENGTH + UTRIE2_MAX_INDEX_1_LENGTH + Trie_1.UTRIE2_INDEX_2_MASK) & ~Trie_1.UTRIE2_INDEX_2_MASK;
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/**
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* Maximum length of the build-time index-2 array.
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* Maximum number of Unicode code points (0x110000) shifted right by UTRIE2_SHIFT_2,
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* plus the part of the index-2 table for lead surrogate code points,
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* plus the build-time index gap,
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* plus the null index-2 block.
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*/
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var UNEWTRIE2_MAX_INDEX_2_LENGTH = (0x110000 >> Trie_1.UTRIE2_SHIFT_2) +
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Trie_1.UTRIE2_LSCP_INDEX_2_LENGTH +
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UNEWTRIE2_INDEX_GAP_LENGTH +
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Trie_1.UTRIE2_INDEX_2_BLOCK_LENGTH;
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var UNEWTRIE2_INDEX_1_LENGTH = 0x110000 >> Trie_1.UTRIE2_SHIFT_1;
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/**
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* Maximum length of the build-time data array.
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* One entry per 0x110000 code points, plus the illegal-UTF-8 block and the null block,
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* plus values for the 0x400 surrogate code units.
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*/
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var UNEWTRIE2_MAX_DATA_LENGTH = 0x110000 + 0x40 + 0x40 + 0x400;
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/* Start with allocation of 16k data entries. */
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var UNEWTRIE2_INITIAL_DATA_LENGTH = 1 << 14;
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/* Grow about 8x each time. */
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var UNEWTRIE2_MEDIUM_DATA_LENGTH = 1 << 17;
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/** The null index-2 block, following the gap in the index-2 table. */
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var UNEWTRIE2_INDEX_2_NULL_OFFSET = UNEWTRIE2_INDEX_GAP_OFFSET + UNEWTRIE2_INDEX_GAP_LENGTH;
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/** The start of allocated index-2 blocks. */
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var UNEWTRIE2_INDEX_2_START_OFFSET = UNEWTRIE2_INDEX_2_NULL_OFFSET + Trie_1.UTRIE2_INDEX_2_BLOCK_LENGTH;
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/**
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* The null data block.
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* Length 64=0x40 even if UTRIE2_DATA_BLOCK_LENGTH is smaller,
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* to work with 6-bit trail bytes from 2-byte UTF-8.
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*/
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var UNEWTRIE2_DATA_NULL_OFFSET = UTRIE2_DATA_START_OFFSET;
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/** The start of allocated data blocks. */
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var UNEWTRIE2_DATA_START_OFFSET = UNEWTRIE2_DATA_NULL_OFFSET + 0x40;
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/**
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* The start of data blocks for U+0800 and above.
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* Below, compaction uses a block length of 64 for 2-byte UTF-8.
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* From here on, compaction uses UTRIE2_DATA_BLOCK_LENGTH.
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* Data values for 0x780 code points beyond ASCII.
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*/
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var UNEWTRIE2_DATA_0800_OFFSET = UNEWTRIE2_DATA_START_OFFSET + 0x780;
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/**
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* Maximum length of the runtime index array.
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* Limited by its own 16-bit index values, and by uint16_t UTrie2Header.indexLength.
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* (The actual maximum length is lower,
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* (0x110000>>UTRIE2_SHIFT_2)+UTRIE2_UTF8_2B_INDEX_2_LENGTH+UTRIE2_MAX_INDEX_1_LENGTH.)
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*/
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var UTRIE2_MAX_INDEX_LENGTH = 0xffff;
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/**
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* Maximum length of the runtime data array.
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* Limited by 16-bit index values that are left-shifted by UTRIE2_INDEX_SHIFT,
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* and by uint16_t UTrie2Header.shiftedDataLength.
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*/
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var UTRIE2_MAX_DATA_LENGTH = 0xffff << Trie_1.UTRIE2_INDEX_SHIFT;
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exports.BITS_16 = 16;
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exports.BITS_32 = 32;
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var isHighSurrogate = function (c) { return c >= 0xd800 && c <= 0xdbff; };
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var equalInt = function (a, s, t, length) {
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for (var i = 0; i < length; i++) {
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if (a[s + i] !== a[t + i]) {
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return false;
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}
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}
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return true;
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};
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var TrieBuilder = /** @class */ (function () {
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function TrieBuilder(initialValue, errorValue) {
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if (initialValue === void 0) { initialValue = 0; }
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if (errorValue === void 0) { errorValue = 0; }
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this.initialValue = initialValue;
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this.errorValue = errorValue;
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this.highStart = 0x110000;
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this.data = new Uint32Array(UNEWTRIE2_INITIAL_DATA_LENGTH);
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this.dataCapacity = UNEWTRIE2_INITIAL_DATA_LENGTH;
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this.highStart = 0x110000;
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this.firstFreeBlock = 0; /* no free block in the list */
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this.isCompacted = false;
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this.index1 = new Uint32Array(UNEWTRIE2_INDEX_1_LENGTH);
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this.index2 = new Uint32Array(UNEWTRIE2_MAX_INDEX_2_LENGTH);
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/*
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* Multi-purpose per-data-block table.
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*
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* Before compacting:
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*
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* Per-data-block reference counters/free-block list.
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* 0: unused
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* >0: reference counter (number of index-2 entries pointing here)
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* <0: next free data block in free-block list
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*
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* While compacting:
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*
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* Map of adjusted indexes, used in compactData() and compactIndex2().
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* Maps from original indexes to new ones.
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*/
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this.map = new Uint32Array(UNEWTRIE2_MAX_DATA_LENGTH >> Trie_1.UTRIE2_SHIFT_2);
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/*
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* preallocate and reset
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* - ASCII
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* - the bad-UTF-8-data block
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* - the null data block
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*/
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var i, j;
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for (i = 0; i < 0x80; ++i) {
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this.data[i] = initialValue;
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}
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for (; i < 0xc0; ++i) {
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this.data[i] = errorValue;
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}
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for (i = UNEWTRIE2_DATA_NULL_OFFSET; i < UNEWTRIE2_DATA_START_OFFSET; ++i) {
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this.data[i] = initialValue;
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}
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this.dataNullOffset = UNEWTRIE2_DATA_NULL_OFFSET;
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this.dataLength = UNEWTRIE2_DATA_START_OFFSET;
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/* set the index-2 indexes for the 2=0x80>>UTRIE2_SHIFT_2 ASCII data blocks */
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for (i = 0, j = 0; j < 0x80; ++i, j += Trie_1.UTRIE2_DATA_BLOCK_LENGTH) {
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this.index2[i] = j;
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this.map[i] = 1;
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}
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/* reference counts for the bad-UTF-8-data block */
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for (; j < 0xc0; ++i, j += Trie_1.UTRIE2_DATA_BLOCK_LENGTH) {
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this.map[i] = 0;
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}
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/*
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* Reference counts for the null data block: all blocks except for the ASCII blocks.
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* Plus 1 so that we don't drop this block during compaction.
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* Plus as many as needed for lead surrogate code points.
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*/
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/* i==newTrie->dataNullOffset */
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this.map[i++] = (0x110000 >> Trie_1.UTRIE2_SHIFT_2) - (0x80 >> Trie_1.UTRIE2_SHIFT_2) + 1 + Trie_1.UTRIE2_LSCP_INDEX_2_LENGTH;
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j += Trie_1.UTRIE2_DATA_BLOCK_LENGTH;
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for (; j < UNEWTRIE2_DATA_START_OFFSET; ++i, j += Trie_1.UTRIE2_DATA_BLOCK_LENGTH) {
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this.map[i] = 0;
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}
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/*
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* set the remaining indexes in the BMP index-2 block
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* to the null data block
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*/
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for (i = 0x80 >> Trie_1.UTRIE2_SHIFT_2; i < Trie_1.UTRIE2_INDEX_2_BMP_LENGTH; ++i) {
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this.index2[i] = UNEWTRIE2_DATA_NULL_OFFSET;
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}
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/*
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* Fill the index gap with impossible values so that compaction
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* does not overlap other index-2 blocks with the gap.
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*/
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for (i = 0; i < UNEWTRIE2_INDEX_GAP_LENGTH; ++i) {
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this.index2[UNEWTRIE2_INDEX_GAP_OFFSET + i] = -1;
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}
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/* set the indexes in the null index-2 block */
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for (i = 0; i < Trie_1.UTRIE2_INDEX_2_BLOCK_LENGTH; ++i) {
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this.index2[UNEWTRIE2_INDEX_2_NULL_OFFSET + i] = UNEWTRIE2_DATA_NULL_OFFSET;
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}
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this.index2NullOffset = UNEWTRIE2_INDEX_2_NULL_OFFSET;
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this.index2Length = UNEWTRIE2_INDEX_2_START_OFFSET;
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/* set the index-1 indexes for the linear index-2 block */
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for (i = 0, j = 0; i < Trie_1.UTRIE2_OMITTED_BMP_INDEX_1_LENGTH; ++i, j += Trie_1.UTRIE2_INDEX_2_BLOCK_LENGTH) {
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this.index1[i] = j;
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}
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/* set the remaining index-1 indexes to the null index-2 block */
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for (; i < UNEWTRIE2_INDEX_1_LENGTH; ++i) {
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this.index1[i] = UNEWTRIE2_INDEX_2_NULL_OFFSET;
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}
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/*
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* Preallocate and reset data for U+0080..U+07ff,
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* for 2-byte UTF-8 which will be compacted in 64-blocks
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* even if UTRIE2_DATA_BLOCK_LENGTH is smaller.
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*/
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for (i = 0x80; i < 0x800; i += Trie_1.UTRIE2_DATA_BLOCK_LENGTH) {
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this.set(i, initialValue);
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}
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}
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/**
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* Set a value for a code point.
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*
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* @param c the code point
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* @param value the value
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*/
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TrieBuilder.prototype.set = function (c, value) {
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if (c < 0 || c > 0x10ffff) {
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throw new Error('Invalid code point.');
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}
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this._set(c, true, value);
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return this;
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};
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/**
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* Set a value in a range of code points [start..end].
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* All code points c with start<=c<=end will get the value if
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* overwrite is TRUE or if the old value is the initial value.
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*
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* @param start the first code point to get the value
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* @param end the last code point to get the value (inclusive)
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* @param value the value
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* @param overwrite flag for whether old non-initial values are to be overwritten
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*/
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TrieBuilder.prototype.setRange = function (start, end, value, overwrite) {
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if (overwrite === void 0) { overwrite = false; }
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/*
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* repeat value in [start..end]
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* mark index values for repeat-data blocks by setting bit 31 of the index values
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* fill around existing values if any, if(overwrite)
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*/
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var block, rest, repeatBlock;
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if (start > 0x10ffff || start < 0 || end > 0x10ffff || end < 0 || start > end) {
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throw new Error('Invalid code point range.');
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}
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if (!overwrite && value === this.initialValue) {
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return this; /* nothing to do */
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}
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if (this.isCompacted) {
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throw new Error('Trie was already compacted');
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}
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var limit = end + 1;
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if ((start & Trie_1.UTRIE2_DATA_MASK) !== 0) {
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/* set partial block at [start..following block boundary[ */
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block = this.getDataBlock(start, true);
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var nextStart = (start + Trie_1.UTRIE2_DATA_BLOCK_LENGTH) & ~Trie_1.UTRIE2_DATA_MASK;
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if (nextStart <= limit) {
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this.fillBlock(block, start & Trie_1.UTRIE2_DATA_MASK, Trie_1.UTRIE2_DATA_BLOCK_LENGTH, value, this.initialValue, overwrite);
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start = nextStart;
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}
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else {
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this.fillBlock(block, start & Trie_1.UTRIE2_DATA_MASK, limit & Trie_1.UTRIE2_DATA_MASK, value, this.initialValue, overwrite);
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return this;
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}
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}
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/* number of positions in the last, partial block */
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rest = limit & Trie_1.UTRIE2_DATA_MASK;
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/* round down limit to a block boundary */
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limit &= ~Trie_1.UTRIE2_DATA_MASK;
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/* iterate over all-value blocks */
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repeatBlock = value === this.initialValue ? this.dataNullOffset : -1;
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while (start < limit) {
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var i2 = void 0;
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var setRepeatBlock = false;
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if (value === this.initialValue && this.isInNullBlock(start, true)) {
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start += Trie_1.UTRIE2_DATA_BLOCK_LENGTH; /* nothing to do */
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continue;
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}
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/* get index value */
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i2 = this.getIndex2Block(start, true);
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i2 += (start >> Trie_1.UTRIE2_SHIFT_2) & Trie_1.UTRIE2_INDEX_2_MASK;
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block = this.index2[i2];
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if (this.isWritableBlock(block)) {
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/* already allocated */
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if (overwrite && block >= UNEWTRIE2_DATA_0800_OFFSET) {
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/*
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* We overwrite all values, and it's not a
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* protected (ASCII-linear or 2-byte UTF-8) block:
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* replace with the repeatBlock.
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*/
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setRepeatBlock = true;
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}
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else {
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/* !overwrite, or protected block: just write the values into this block */
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this.fillBlock(block, 0, Trie_1.UTRIE2_DATA_BLOCK_LENGTH, value, this.initialValue, overwrite);
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}
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}
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else if (this.data[block] !== value && (overwrite || block === this.dataNullOffset)) {
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/*
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* Set the repeatBlock instead of the null block or previous repeat block:
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*
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* If !isWritableBlock() then all entries in the block have the same value
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* because it's the null block or a range block (the repeatBlock from a previous
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* call to utrie2_setRange32()).
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* No other blocks are used multiple times before compacting.
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*
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* The null block is the only non-writable block with the initialValue because
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* of the repeatBlock initialization above. (If value==initialValue, then
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* the repeatBlock will be the null data block.)
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*
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* We set our repeatBlock if the desired value differs from the block's value,
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* and if we overwrite any data or if the data is all initial values
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* (which is the same as the block being the null block, see above).
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*/
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setRepeatBlock = true;
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}
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if (setRepeatBlock) {
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if (repeatBlock >= 0) {
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this.setIndex2Entry(i2, repeatBlock);
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}
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else {
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/* create and set and fill the repeatBlock */
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repeatBlock = this.getDataBlock(start, true);
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this.writeBlock(repeatBlock, value);
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}
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}
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start += Trie_1.UTRIE2_DATA_BLOCK_LENGTH;
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}
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if (rest > 0) {
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/* set partial block at [last block boundary..limit[ */
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block = this.getDataBlock(start, true);
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this.fillBlock(block, 0, rest, value, this.initialValue, overwrite);
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}
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return this;
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};
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/**
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* Get the value for a code point as stored in the Trie2.
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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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TrieBuilder.prototype.get = function (codePoint) {
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if (codePoint < 0 || codePoint > 0x10ffff) {
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return this.errorValue;
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}
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else {
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return this._get(codePoint, true);
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}
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};
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TrieBuilder.prototype._get = function (c, fromLSCP) {
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var i2;
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if (c >= this.highStart && (!(c >= 0xd800 && c < 0xdc00) || fromLSCP)) {
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return this.data[this.dataLength - UTRIE2_DATA_GRANULARITY];
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}
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if (c >= 0xd800 && c < 0xdc00 && fromLSCP) {
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i2 = Trie_1.UTRIE2_LSCP_INDEX_2_OFFSET - (0xd800 >> Trie_1.UTRIE2_SHIFT_2) + (c >> Trie_1.UTRIE2_SHIFT_2);
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}
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else {
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i2 = this.index1[c >> Trie_1.UTRIE2_SHIFT_1] + ((c >> Trie_1.UTRIE2_SHIFT_2) & Trie_1.UTRIE2_INDEX_2_MASK);
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}
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var block = this.index2[i2];
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return this.data[block + (c & Trie_1.UTRIE2_DATA_MASK)];
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};
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TrieBuilder.prototype.freeze = function (valueBits) {
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if (valueBits === void 0) { valueBits = exports.BITS_32; }
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var i;
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var allIndexesLength;
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var dataMove; /* >0 if the data is moved to the end of the index array */
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/* compact if necessary */
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if (!this.isCompacted) {
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this.compactTrie();
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}
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allIndexesLength = this.highStart <= 0x10000 ? Trie_1.UTRIE2_INDEX_1_OFFSET : this.index2Length;
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if (valueBits === exports.BITS_16) {
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// dataMove = allIndexesLength;
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dataMove = 0;
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}
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else {
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dataMove = 0;
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}
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/* are indexLength and dataLength within limits? */
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if (
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/* for unshifted indexLength */
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allIndexesLength > UTRIE2_MAX_INDEX_LENGTH ||
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/* for unshifted dataNullOffset */
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dataMove + this.dataNullOffset > 0xffff ||
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/* for unshifted 2-byte UTF-8 index-2 values */
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dataMove + UNEWTRIE2_DATA_0800_OFFSET > 0xffff ||
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/* for shiftedDataLength */
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dataMove + this.dataLength > UTRIE2_MAX_DATA_LENGTH) {
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throw new Error('Trie data is too large.');
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}
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var index = new Uint16Array(allIndexesLength);
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/* write the index-2 array values shifted right by UTRIE2_INDEX_SHIFT, after adding dataMove */
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var destIdx = 0;
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for (i = 0; i < Trie_1.UTRIE2_INDEX_2_BMP_LENGTH; i++) {
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index[destIdx++] = (this.index2[i] + dataMove) >> Trie_1.UTRIE2_INDEX_SHIFT;
|
|
}
|
|
/* write UTF-8 2-byte index-2 values, not right-shifted */
|
|
for (i = 0; i < 0xc2 - 0xc0; ++i) {
|
|
/* C0..C1 */
|
|
index[destIdx++] = dataMove + UTRIE2_BAD_UTF8_DATA_OFFSET;
|
|
}
|
|
for (; i < 0xe0 - 0xc0; ++i) {
|
|
/* C2..DF */
|
|
index[destIdx++] = dataMove + this.index2[i << (6 - Trie_1.UTRIE2_SHIFT_2)];
|
|
}
|
|
if (this.highStart > 0x10000) {
|
|
var index1Length = (this.highStart - 0x10000) >> Trie_1.UTRIE2_SHIFT_1;
|
|
var index2Offset = Trie_1.UTRIE2_INDEX_2_BMP_LENGTH + Trie_1.UTRIE2_UTF8_2B_INDEX_2_LENGTH + index1Length;
|
|
/* write 16-bit index-1 values for supplementary code points */
|
|
for (i = 0; i < index1Length; i++) {
|
|
index[destIdx++] = UTRIE2_INDEX_2_OFFSET + this.index1[i + Trie_1.UTRIE2_OMITTED_BMP_INDEX_1_LENGTH];
|
|
}
|
|
/*
|
|
* write the index-2 array values for supplementary code points,
|
|
* shifted right by UTRIE2_INDEX_SHIFT, after adding dataMove
|
|
*/
|
|
for (i = 0; i < this.index2Length - index2Offset; i++) {
|
|
index[destIdx++] = (dataMove + this.index2[index2Offset + i]) >> Trie_1.UTRIE2_INDEX_SHIFT;
|
|
}
|
|
}
|
|
/* write the 16/32-bit data array */
|
|
switch (valueBits) {
|
|
case exports.BITS_16:
|
|
/* write 16-bit data values */
|
|
var data16 = new Uint16Array(this.dataLength);
|
|
for (i = 0; i < this.dataLength; i++) {
|
|
data16[i] = this.data[i];
|
|
}
|
|
return new Trie_1.Trie(this.initialValue, this.errorValue, this.highStart, dataMove + this.dataLength - UTRIE2_DATA_GRANULARITY, index, data16);
|
|
case exports.BITS_32:
|
|
/* write 32-bit data values */
|
|
var data32 = new Uint32Array(this.dataLength);
|
|
for (i = 0; i < this.dataLength; i++) {
|
|
data32[i] = this.data[i];
|
|
}
|
|
return new Trie_1.Trie(this.initialValue, this.errorValue, this.highStart, dataMove + this.dataLength - UTRIE2_DATA_GRANULARITY, index, data32);
|
|
default:
|
|
throw new Error('Bits should be either 16 or 32');
|
|
}
|
|
};
|
|
/*
|
|
* Find the start of the last range in the trie by enumerating backward.
|
|
* Indexes for supplementary code points higher than this will be omitted.
|
|
*/
|
|
TrieBuilder.prototype.findHighStart = function (highValue) {
|
|
var value;
|
|
var i2, j, i2Block, prevI2Block, block, prevBlock;
|
|
/* set variables for previous range */
|
|
if (highValue === this.initialValue) {
|
|
prevI2Block = this.index2NullOffset;
|
|
prevBlock = this.dataNullOffset;
|
|
}
|
|
else {
|
|
prevI2Block = -1;
|
|
prevBlock = -1;
|
|
}
|
|
var prev = 0x110000;
|
|
/* enumerate index-2 blocks */
|
|
var i1 = UNEWTRIE2_INDEX_1_LENGTH;
|
|
var c = prev;
|
|
while (c > 0) {
|
|
i2Block = this.index1[--i1];
|
|
if (i2Block === prevI2Block) {
|
|
/* the index-2 block is the same as the previous one, and filled with highValue */
|
|
c -= UTRIE2_CP_PER_INDEX_1_ENTRY;
|
|
continue;
|
|
}
|
|
prevI2Block = i2Block;
|
|
if (i2Block === this.index2NullOffset) {
|
|
/* this is the null index-2 block */
|
|
if (highValue !== this.initialValue) {
|
|
return c;
|
|
}
|
|
c -= UTRIE2_CP_PER_INDEX_1_ENTRY;
|
|
}
|
|
else {
|
|
/* enumerate data blocks for one index-2 block */
|
|
for (i2 = Trie_1.UTRIE2_INDEX_2_BLOCK_LENGTH; i2 > 0;) {
|
|
block = this.index2[i2Block + --i2];
|
|
if (block === prevBlock) {
|
|
/* the block is the same as the previous one, and filled with highValue */
|
|
c -= Trie_1.UTRIE2_DATA_BLOCK_LENGTH;
|
|
continue;
|
|
}
|
|
prevBlock = block;
|
|
if (block === this.dataNullOffset) {
|
|
/* this is the null data block */
|
|
if (highValue !== this.initialValue) {
|
|
return c;
|
|
}
|
|
c -= Trie_1.UTRIE2_DATA_BLOCK_LENGTH;
|
|
}
|
|
else {
|
|
for (j = Trie_1.UTRIE2_DATA_BLOCK_LENGTH; j > 0;) {
|
|
value = this.data[block + --j];
|
|
if (value !== highValue) {
|
|
return c;
|
|
}
|
|
--c;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* deliver last range */
|
|
return 0;
|
|
};
|
|
/*
|
|
* Compact a build-time trie.
|
|
*
|
|
* The compaction
|
|
* - removes blocks that are identical with earlier ones
|
|
* - overlaps adjacent blocks as much as possible (if overlap==TRUE)
|
|
* - moves blocks in steps of the data granularity
|
|
* - moves and overlaps blocks that overlap with multiple values in the overlap region
|
|
*
|
|
* It does not
|
|
* - try to move and overlap blocks that are not already adjacent
|
|
*/
|
|
TrieBuilder.prototype.compactData = function () {
|
|
var start, movedStart;
|
|
var blockLength, overlap;
|
|
var i, mapIndex, blockCount;
|
|
/* do not compact linear-ASCII data */
|
|
var newStart = UTRIE2_DATA_START_OFFSET;
|
|
for (start = 0, i = 0; start < newStart; start += Trie_1.UTRIE2_DATA_BLOCK_LENGTH, ++i) {
|
|
this.map[i] = start;
|
|
}
|
|
/*
|
|
* Start with a block length of 64 for 2-byte UTF-8,
|
|
* then switch to UTRIE2_DATA_BLOCK_LENGTH.
|
|
*/
|
|
blockLength = 64;
|
|
blockCount = blockLength >> Trie_1.UTRIE2_SHIFT_2;
|
|
for (start = newStart; start < this.dataLength;) {
|
|
/*
|
|
* start: index of first entry of current block
|
|
* newStart: index where the current block is to be moved
|
|
* (right after current end of already-compacted data)
|
|
*/
|
|
if (start === UNEWTRIE2_DATA_0800_OFFSET) {
|
|
blockLength = Trie_1.UTRIE2_DATA_BLOCK_LENGTH;
|
|
blockCount = 1;
|
|
}
|
|
/* skip blocks that are not used */
|
|
if (this.map[start >> Trie_1.UTRIE2_SHIFT_2] <= 0) {
|
|
/* advance start to the next block */
|
|
start += blockLength;
|
|
/* leave newStart with the previous block! */
|
|
continue;
|
|
}
|
|
/* search for an identical block */
|
|
movedStart = this.findSameDataBlock(newStart, start, blockLength);
|
|
if (movedStart >= 0) {
|
|
/* found an identical block, set the other block's index value for the current block */
|
|
for (i = blockCount, mapIndex = start >> Trie_1.UTRIE2_SHIFT_2; i > 0; --i) {
|
|
this.map[mapIndex++] = movedStart;
|
|
movedStart += Trie_1.UTRIE2_DATA_BLOCK_LENGTH;
|
|
}
|
|
/* advance start to the next block */
|
|
start += blockLength;
|
|
/* leave newStart with the previous block! */
|
|
continue;
|
|
}
|
|
/* see if the beginning of this block can be overlapped with the end of the previous block */
|
|
/* look for maximum overlap (modulo granularity) with the previous, adjacent block */
|
|
for (overlap = blockLength - UTRIE2_DATA_GRANULARITY; overlap > 0 && !equalInt(this.data, newStart - overlap, start, overlap); overlap -= UTRIE2_DATA_GRANULARITY) { }
|
|
if (overlap > 0 || newStart < start) {
|
|
/* some overlap, or just move the whole block */
|
|
movedStart = newStart - overlap;
|
|
for (i = blockCount, mapIndex = start >> Trie_1.UTRIE2_SHIFT_2; i > 0; --i) {
|
|
this.map[mapIndex++] = movedStart;
|
|
movedStart += Trie_1.UTRIE2_DATA_BLOCK_LENGTH;
|
|
}
|
|
/* move the non-overlapping indexes to their new positions */
|
|
start += overlap;
|
|
for (i = blockLength - overlap; i > 0; --i) {
|
|
this.data[newStart++] = this.data[start++];
|
|
}
|
|
}
|
|
else {
|
|
/* no overlap && newStart==start */
|
|
for (i = blockCount, mapIndex = start >> Trie_1.UTRIE2_SHIFT_2; i > 0; --i) {
|
|
this.map[mapIndex++] = start;
|
|
start += Trie_1.UTRIE2_DATA_BLOCK_LENGTH;
|
|
}
|
|
newStart = start;
|
|
}
|
|
}
|
|
/* now adjust the index-2 table */
|
|
for (i = 0; i < this.index2Length; ++i) {
|
|
if (i === UNEWTRIE2_INDEX_GAP_OFFSET) {
|
|
/* Gap indexes are invalid (-1). Skip over the gap. */
|
|
i += UNEWTRIE2_INDEX_GAP_LENGTH;
|
|
}
|
|
this.index2[i] = this.map[this.index2[i] >> Trie_1.UTRIE2_SHIFT_2];
|
|
}
|
|
this.dataNullOffset = this.map[this.dataNullOffset >> Trie_1.UTRIE2_SHIFT_2];
|
|
/* ensure dataLength alignment */
|
|
while ((newStart & (UTRIE2_DATA_GRANULARITY - 1)) !== 0) {
|
|
this.data[newStart++] = this.initialValue;
|
|
}
|
|
this.dataLength = newStart;
|
|
};
|
|
TrieBuilder.prototype.findSameDataBlock = function (dataLength, otherBlock, blockLength) {
|
|
var block = 0;
|
|
/* ensure that we do not even partially get past dataLength */
|
|
dataLength -= blockLength;
|
|
for (; block <= dataLength; block += UTRIE2_DATA_GRANULARITY) {
|
|
if (equalInt(this.data, block, otherBlock, blockLength)) {
|
|
return block;
|
|
}
|
|
}
|
|
return -1;
|
|
};
|
|
TrieBuilder.prototype.compactTrie = function () {
|
|
var highValue = this.get(0x10ffff);
|
|
/* find highStart and round it up */
|
|
var localHighStart = this.findHighStart(highValue);
|
|
localHighStart = (localHighStart + (UTRIE2_CP_PER_INDEX_1_ENTRY - 1)) & ~(UTRIE2_CP_PER_INDEX_1_ENTRY - 1);
|
|
if (localHighStart === 0x110000) {
|
|
highValue = this.errorValue;
|
|
}
|
|
/*
|
|
* Set trie->highStart only after utrie2_get32(trie, highStart).
|
|
* Otherwise utrie2_get32(trie, highStart) would try to read the highValue.
|
|
*/
|
|
this.highStart = localHighStart;
|
|
if (this.highStart < 0x110000) {
|
|
/* Blank out [highStart..10ffff] to release associated data blocks. */
|
|
var suppHighStart = this.highStart <= 0x10000 ? 0x10000 : this.highStart;
|
|
this.setRange(suppHighStart, 0x10ffff, this.initialValue, true);
|
|
}
|
|
this.compactData();
|
|
if (this.highStart > 0x10000) {
|
|
this.compactIndex2();
|
|
}
|
|
/*
|
|
* Store the highValue in the data array and round up the dataLength.
|
|
* Must be done after compactData() because that assumes that dataLength
|
|
* is a multiple of UTRIE2_DATA_BLOCK_LENGTH.
|
|
*/
|
|
this.data[this.dataLength++] = highValue;
|
|
while ((this.dataLength & (UTRIE2_DATA_GRANULARITY - 1)) !== 0) {
|
|
this.data[this.dataLength++] = this.initialValue;
|
|
}
|
|
this.isCompacted = true;
|
|
};
|
|
TrieBuilder.prototype.compactIndex2 = function () {
|
|
var i, start, movedStart, overlap;
|
|
/* do not compact linear-BMP index-2 blocks */
|
|
var newStart = Trie_1.UTRIE2_INDEX_2_BMP_LENGTH;
|
|
for (start = 0, i = 0; start < newStart; start += Trie_1.UTRIE2_INDEX_2_BLOCK_LENGTH, ++i) {
|
|
this.map[i] = start;
|
|
}
|
|
/* Reduce the index table gap to what will be needed at runtime. */
|
|
newStart += Trie_1.UTRIE2_UTF8_2B_INDEX_2_LENGTH + ((this.highStart - 0x10000) >> Trie_1.UTRIE2_SHIFT_1);
|
|
for (start = UNEWTRIE2_INDEX_2_NULL_OFFSET; start < this.index2Length;) {
|
|
/*
|
|
* start: index of first entry of current block
|
|
* newStart: index where the current block is to be moved
|
|
* (right after current end of already-compacted data)
|
|
*/
|
|
/* search for an identical block */
|
|
if ((movedStart = this.findSameIndex2Block(newStart, start)) >= 0) {
|
|
/* found an identical block, set the other block's index value for the current block */
|
|
this.map[start >> Trie_1.UTRIE2_SHIFT_1_2] = movedStart;
|
|
/* advance start to the next block */
|
|
start += Trie_1.UTRIE2_INDEX_2_BLOCK_LENGTH;
|
|
/* leave newStart with the previous block! */
|
|
continue;
|
|
}
|
|
/* see if the beginning of this block can be overlapped with the end of the previous block */
|
|
/* look for maximum overlap with the previous, adjacent block */
|
|
for (overlap = Trie_1.UTRIE2_INDEX_2_BLOCK_LENGTH - 1; overlap > 0 && !equalInt(this.index2, newStart - overlap, start, overlap); --overlap) { }
|
|
if (overlap > 0 || newStart < start) {
|
|
/* some overlap, or just move the whole block */
|
|
this.map[start >> Trie_1.UTRIE2_SHIFT_1_2] = newStart - overlap;
|
|
/* move the non-overlapping indexes to their new positions */
|
|
start += overlap;
|
|
for (i = Trie_1.UTRIE2_INDEX_2_BLOCK_LENGTH - overlap; i > 0; --i) {
|
|
this.index2[newStart++] = this.index2[start++];
|
|
}
|
|
}
|
|
else {
|
|
/* no overlap && newStart==start */ this.map[start >> Trie_1.UTRIE2_SHIFT_1_2] = start;
|
|
start += Trie_1.UTRIE2_INDEX_2_BLOCK_LENGTH;
|
|
newStart = start;
|
|
}
|
|
}
|
|
/* now adjust the index-1 table */
|
|
for (i = 0; i < UNEWTRIE2_INDEX_1_LENGTH; ++i) {
|
|
this.index1[i] = this.map[this.index1[i] >> Trie_1.UTRIE2_SHIFT_1_2];
|
|
}
|
|
this.index2NullOffset = this.map[this.index2NullOffset >> Trie_1.UTRIE2_SHIFT_1_2];
|
|
/*
|
|
* Ensure data table alignment:
|
|
* Needs to be granularity-aligned for 16-bit trie
|
|
* (so that dataMove will be down-shiftable),
|
|
* and 2-aligned for uint32_t data.
|
|
*/
|
|
while ((newStart & ((UTRIE2_DATA_GRANULARITY - 1) | 1)) !== 0) {
|
|
/* Arbitrary value: 0x3fffc not possible for real data. */
|
|
this.index2[newStart++] = 0x0000ffff << Trie_1.UTRIE2_INDEX_SHIFT;
|
|
}
|
|
this.index2Length = newStart;
|
|
};
|
|
TrieBuilder.prototype.findSameIndex2Block = function (index2Length, otherBlock) {
|
|
/* ensure that we do not even partially get past index2Length */
|
|
index2Length -= Trie_1.UTRIE2_INDEX_2_BLOCK_LENGTH;
|
|
for (var block = 0; block <= index2Length; ++block) {
|
|
if (equalInt(this.index2, block, otherBlock, Trie_1.UTRIE2_INDEX_2_BLOCK_LENGTH)) {
|
|
return block;
|
|
}
|
|
}
|
|
return -1;
|
|
};
|
|
TrieBuilder.prototype._set = function (c, forLSCP, value) {
|
|
if (this.isCompacted) {
|
|
throw new Error('Trie was already compacted');
|
|
}
|
|
var block = this.getDataBlock(c, forLSCP);
|
|
this.data[block + (c & Trie_1.UTRIE2_DATA_MASK)] = value;
|
|
return this;
|
|
};
|
|
TrieBuilder.prototype.writeBlock = function (block, value) {
|
|
var limit = block + Trie_1.UTRIE2_DATA_BLOCK_LENGTH;
|
|
while (block < limit) {
|
|
this.data[block++] = value;
|
|
}
|
|
};
|
|
TrieBuilder.prototype.isInNullBlock = function (c, forLSCP) {
|
|
var i2 = isHighSurrogate(c) && forLSCP
|
|
? Trie_1.UTRIE2_LSCP_INDEX_2_OFFSET - (0xd800 >> Trie_1.UTRIE2_SHIFT_2) + (c >> Trie_1.UTRIE2_SHIFT_2)
|
|
: this.index1[c >> Trie_1.UTRIE2_SHIFT_1] + ((c >> Trie_1.UTRIE2_SHIFT_2) & Trie_1.UTRIE2_INDEX_2_MASK);
|
|
var block = this.index2[i2];
|
|
return block === this.dataNullOffset;
|
|
};
|
|
TrieBuilder.prototype.fillBlock = function (block, start, limit, value, initialValue, overwrite) {
|
|
var pLimit = block + limit;
|
|
if (overwrite) {
|
|
for (var i = block + start; i < pLimit; i++) {
|
|
this.data[i] = value;
|
|
}
|
|
}
|
|
else {
|
|
for (var i = block + start; i < pLimit; i++) {
|
|
if (this.data[i] === initialValue) {
|
|
this.data[i] = value;
|
|
}
|
|
}
|
|
}
|
|
};
|
|
TrieBuilder.prototype.setIndex2Entry = function (i2, block) {
|
|
++this.map[block >> Trie_1.UTRIE2_SHIFT_2]; /* increment first, in case block==oldBlock! */
|
|
var oldBlock = this.index2[i2];
|
|
if (0 === --this.map[oldBlock >> Trie_1.UTRIE2_SHIFT_2]) {
|
|
this.releaseDataBlock(oldBlock);
|
|
}
|
|
this.index2[i2] = block;
|
|
};
|
|
TrieBuilder.prototype.releaseDataBlock = function (block) {
|
|
/* put this block at the front of the free-block chain */
|
|
this.map[block >> Trie_1.UTRIE2_SHIFT_2] = -this.firstFreeBlock;
|
|
this.firstFreeBlock = block;
|
|
};
|
|
TrieBuilder.prototype.getDataBlock = function (c, forLSCP) {
|
|
var i2 = this.getIndex2Block(c, forLSCP);
|
|
i2 += (c >> Trie_1.UTRIE2_SHIFT_2) & Trie_1.UTRIE2_INDEX_2_MASK;
|
|
var oldBlock = this.index2[i2];
|
|
if (this.isWritableBlock(oldBlock)) {
|
|
return oldBlock;
|
|
}
|
|
/* allocate a new data block */
|
|
var newBlock = this.allocDataBlock(oldBlock);
|
|
this.setIndex2Entry(i2, newBlock);
|
|
return newBlock;
|
|
};
|
|
TrieBuilder.prototype.isWritableBlock = function (block) {
|
|
return block !== this.dataNullOffset && 1 === this.map[block >> Trie_1.UTRIE2_SHIFT_2];
|
|
};
|
|
TrieBuilder.prototype.getIndex2Block = function (c, forLSCP) {
|
|
if (c >= 0xd800 && c < 0xdc00 && forLSCP) {
|
|
return Trie_1.UTRIE2_LSCP_INDEX_2_OFFSET;
|
|
}
|
|
var i1 = c >> Trie_1.UTRIE2_SHIFT_1;
|
|
var i2 = this.index1[i1];
|
|
if (i2 === this.index2NullOffset) {
|
|
i2 = this.allocIndex2Block();
|
|
this.index1[i1] = i2;
|
|
}
|
|
return i2;
|
|
};
|
|
TrieBuilder.prototype.allocDataBlock = function (copyBlock) {
|
|
var newBlock;
|
|
if (this.firstFreeBlock !== 0) {
|
|
/* get the first free block */
|
|
newBlock = this.firstFreeBlock;
|
|
this.firstFreeBlock = -this.map[newBlock >> Trie_1.UTRIE2_SHIFT_2];
|
|
}
|
|
else {
|
|
/* get a new block from the high end */
|
|
newBlock = this.dataLength;
|
|
var newTop = newBlock + Trie_1.UTRIE2_DATA_BLOCK_LENGTH;
|
|
if (newTop > this.dataCapacity) {
|
|
var capacity = void 0;
|
|
/* out of memory in the data array */
|
|
if (this.dataCapacity < UNEWTRIE2_MEDIUM_DATA_LENGTH) {
|
|
capacity = UNEWTRIE2_MEDIUM_DATA_LENGTH;
|
|
}
|
|
else if (this.dataCapacity < UNEWTRIE2_MAX_DATA_LENGTH) {
|
|
capacity = UNEWTRIE2_MAX_DATA_LENGTH;
|
|
}
|
|
else {
|
|
/*
|
|
* Should never occur.
|
|
* Either UNEWTRIE2_MAX_DATA_LENGTH is incorrect,
|
|
* or the code writes more values than should be possible.
|
|
*/
|
|
throw new Error('Internal error in Trie creation.');
|
|
}
|
|
var newData = new Uint32Array(capacity);
|
|
newData.set(this.data.subarray(0, this.dataLength));
|
|
this.data = newData;
|
|
this.dataCapacity = capacity;
|
|
}
|
|
this.dataLength = newTop;
|
|
}
|
|
this.data.set(this.data.subarray(copyBlock, copyBlock + Trie_1.UTRIE2_DATA_BLOCK_LENGTH), newBlock);
|
|
this.map[newBlock >> Trie_1.UTRIE2_SHIFT_2] = 0;
|
|
return newBlock;
|
|
};
|
|
TrieBuilder.prototype.allocIndex2Block = function () {
|
|
var newBlock = this.index2Length;
|
|
var newTop = newBlock + Trie_1.UTRIE2_INDEX_2_BLOCK_LENGTH;
|
|
if (newTop > this.index2.length) {
|
|
throw new Error('Internal error in Trie creation.');
|
|
/*
|
|
* Should never occur.
|
|
* Either UTRIE2_MAX_BUILD_TIME_INDEX_LENGTH is incorrect,
|
|
* or the code writes more values than should be possible.
|
|
*/
|
|
}
|
|
this.index2Length = newTop;
|
|
this.index2.set(this.index2.subarray(this.index2NullOffset, this.index2NullOffset + Trie_1.UTRIE2_INDEX_2_BLOCK_LENGTH), newBlock);
|
|
return newBlock;
|
|
};
|
|
return TrieBuilder;
|
|
}());
|
|
exports.TrieBuilder = TrieBuilder;
|
|
var serializeBase64 = function (trie) {
|
|
var index = trie.index;
|
|
var data = trie.data;
|
|
if (!(index instanceof Uint16Array) || !(data instanceof Uint16Array || data instanceof Uint32Array)) {
|
|
throw new Error('TrieBuilder serializer only support TypedArrays');
|
|
}
|
|
var headerLength = Uint32Array.BYTES_PER_ELEMENT * 6;
|
|
var bufferLength = headerLength + index.byteLength + data.byteLength;
|
|
var buffer = new ArrayBuffer(Math.ceil(bufferLength / 4) * 4);
|
|
var view32 = new Uint32Array(buffer);
|
|
var view16 = new Uint16Array(buffer);
|
|
view32[0] = trie.initialValue;
|
|
view32[1] = trie.errorValue;
|
|
view32[2] = trie.highStart;
|
|
view32[3] = trie.highValueIndex;
|
|
view32[4] = index.byteLength;
|
|
// $FlowFixMe
|
|
view32[5] = data.BYTES_PER_ELEMENT;
|
|
view16.set(index, headerLength / Uint16Array.BYTES_PER_ELEMENT);
|
|
if (data.BYTES_PER_ELEMENT === Uint16Array.BYTES_PER_ELEMENT) {
|
|
view16.set(data, (headerLength + index.byteLength) / Uint16Array.BYTES_PER_ELEMENT);
|
|
}
|
|
else {
|
|
view32.set(data, Math.ceil((headerLength + index.byteLength) / Uint32Array.BYTES_PER_ELEMENT));
|
|
}
|
|
return [base64_arraybuffer_1.encode(new Uint8Array(buffer)), buffer.byteLength];
|
|
};
|
|
exports.serializeBase64 = serializeBase64;
|
|
//# sourceMappingURL=TrieBuilder.js.map
|