0d073fa89e
- Add GETTING_STARTED.md with quick start guide and development modes - Add INSTALL.sh automated installation script - Add INSTALLATION_CHECKLIST.md, INSTALLATION_SUCCESS.md, and INSTALLATION_SUMMARY.md - Add QUICK_REFERENCE.md for common commands - Add SETUP_GUIDE.md with detailed setup instructions - Update README.md with improved project overview - Add did-wallet app dependencies and node_modules
74 lines
2.1 KiB
JavaScript
74 lines
2.1 KiB
JavaScript
import {
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alloc,
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concat,
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slice
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} from './byte-utils.js';
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const defaultChunkSize = 256;
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export class Bl {
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constructor(chunkSize = defaultChunkSize) {
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this.chunkSize = chunkSize;
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this.cursor = 0;
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this.maxCursor = -1;
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this.chunks = [];
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this._initReuseChunk = null;
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}
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reset() {
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this.cursor = 0;
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this.maxCursor = -1;
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if (this.chunks.length) {
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this.chunks = [];
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}
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if (this._initReuseChunk !== null) {
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this.chunks.push(this._initReuseChunk);
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this.maxCursor = this._initReuseChunk.length - 1;
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}
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}
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push(bytes) {
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let topChunk = this.chunks[this.chunks.length - 1];
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const newMax = this.cursor + bytes.length;
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if (newMax <= this.maxCursor + 1) {
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const chunkPos = topChunk.length - (this.maxCursor - this.cursor) - 1;
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topChunk.set(bytes, chunkPos);
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} else {
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if (topChunk) {
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const chunkPos = topChunk.length - (this.maxCursor - this.cursor) - 1;
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if (chunkPos < topChunk.length) {
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this.chunks[this.chunks.length - 1] = topChunk.subarray(0, chunkPos);
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this.maxCursor = this.cursor - 1;
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}
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}
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if (bytes.length < 64 && bytes.length < this.chunkSize) {
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topChunk = alloc(this.chunkSize);
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this.chunks.push(topChunk);
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this.maxCursor += topChunk.length;
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if (this._initReuseChunk === null) {
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this._initReuseChunk = topChunk;
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}
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topChunk.set(bytes, 0);
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} else {
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this.chunks.push(bytes);
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this.maxCursor += bytes.length;
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}
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}
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this.cursor += bytes.length;
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}
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toBytes(reset = false) {
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let byts;
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if (this.chunks.length === 1) {
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const chunk = this.chunks[0];
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if (reset && this.cursor > chunk.length / 2) {
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byts = this.cursor === chunk.length ? chunk : chunk.subarray(0, this.cursor);
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this._initReuseChunk = null;
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this.chunks = [];
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} else {
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byts = slice(chunk, 0, this.cursor);
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}
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} else {
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byts = concat(this.chunks, this.cursor);
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}
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if (reset) {
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this.reset();
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}
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return byts;
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}
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} |