| Path : /var/www/html/infraai.ai/frontend/node_modules/@jsonjoy.com/buffers/lib/ |
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| Current File : /var/www/html/infraai.ai/frontend/node_modules/@jsonjoy.com/buffers/lib/Writer.js |
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Writer = void 0;
const Slice_1 = require("./Slice");
const EMPTY_UINT8 = new Uint8Array([]);
const EMPTY_VIEW = new DataView(EMPTY_UINT8.buffer);
const hasBuffer = typeof Buffer === 'function';
const utf8Write = hasBuffer
? Buffer.prototype.utf8Write
: null;
const from = hasBuffer ? Buffer.from : null;
const textEncoder = typeof TextEncoder !== 'undefined' ? new TextEncoder() : null;
/**
* Writer class provides an efficient way to encode binary data. It grows the
* internal memory buffer automatically as more space is required. It is useful
* in cases when it is not known in advance the size of memory needed.
*/
class Writer {
/**
* @param allocSize Number of bytes to allocate at a time when buffer ends.
*/
constructor(allocSize = 64 * 1024) {
this.allocSize = allocSize;
/** @ignore */
this.view = EMPTY_VIEW;
/** @ignore */
this.x0 = 0;
/** @ignore */
this.x = 0;
this.uint8 = new Uint8Array(allocSize);
this.size = allocSize;
this.view = new DataView(this.uint8.buffer);
}
/** @ignore */
grow(size) {
const x0 = this.x0;
const x = this.x;
const oldUint8 = this.uint8;
const newUint8 = new Uint8Array(size);
const view = new DataView(newUint8.buffer);
const activeSlice = oldUint8.subarray(x0, x);
newUint8.set(activeSlice, 0);
this.x = x - x0;
this.x0 = 0;
this.uint8 = newUint8;
this.size = size;
this.view = view;
}
/**
* Make sure the internal buffer has enough space to write the specified number
* of bytes, otherwise resize the internal buffer to accommodate for more size.
*
* @param capacity Number of bytes.
*/
ensureCapacity(capacity) {
const byteLength = this.size;
const remaining = byteLength - this.x;
if (remaining < capacity) {
const total = byteLength - this.x0;
const required = capacity - remaining;
const totalRequired = total + required;
this.grow(totalRequired <= this.allocSize ? this.allocSize : totalRequired * 2);
}
}
/** @todo Consider renaming to "skip"? */
move(capacity) {
this.ensureCapacity(capacity);
this.x += capacity;
}
reset() {
this.x0 = this.x;
}
/**
* Allocates a new {@link ArrayBuffer}, useful when the underlying
* {@link ArrayBuffer} cannot be shared between threads.
*
* @param size Size of memory to allocate.
*/
newBuffer(size) {
const uint8 = (this.uint8 = new Uint8Array(size));
this.size = size;
this.view = new DataView(uint8.buffer);
this.x = this.x0 = 0;
}
/**
* @returns Encoded memory buffer contents.
*/
flush() {
const result = this.uint8.subarray(this.x0, this.x);
this.x0 = this.x;
return result;
}
flushSlice() {
const slice = new Slice_1.Slice(this.uint8, this.view, this.x0, this.x);
this.x0 = this.x;
return slice;
}
u8(char) {
this.ensureCapacity(1);
this.uint8[this.x++] = char;
}
u16(word) {
this.ensureCapacity(2);
this.view.setUint16(this.x, word);
this.x += 2;
}
u32(dword) {
this.ensureCapacity(4);
this.view.setUint32(this.x, dword);
this.x += 4;
}
i32(dword) {
this.ensureCapacity(4);
this.view.setInt32(this.x, dword);
this.x += 4;
}
u64(qword) {
this.ensureCapacity(8);
this.view.setBigUint64(this.x, BigInt(qword));
this.x += 8;
}
f64(float) {
this.ensureCapacity(8);
this.view.setFloat64(this.x, float);
this.x += 8;
}
u8u16(u8, u16) {
this.ensureCapacity(3);
let x = this.x;
this.uint8[x++] = u8;
this.uint8[x++] = u16 >>> 8;
this.uint8[x++] = u16 & 0xff;
this.x = x;
}
u8u32(u8, u32) {
this.ensureCapacity(5);
let x = this.x;
this.uint8[x++] = u8;
this.view.setUint32(x, u32);
this.x = x + 4;
}
u8u64(u8, u64) {
this.ensureCapacity(9);
let x = this.x;
this.uint8[x++] = u8;
this.view.setBigUint64(x, BigInt(u64));
this.x = x + 8;
}
u8f32(u8, f32) {
this.ensureCapacity(5);
let x = this.x;
this.uint8[x++] = u8;
this.view.setFloat32(x, f32);
this.x = x + 4;
}
u8f64(u8, f64) {
this.ensureCapacity(9);
let x = this.x;
this.uint8[x++] = u8;
this.view.setFloat64(x, f64);
this.x = x + 8;
}
buf(buf, length) {
this.ensureCapacity(length);
const x = this.x;
this.uint8.set(buf, x);
this.x = x + length;
}
/**
* Encodes string as UTF-8. You need to call .ensureCapacity(str.length * 4)
* before calling
*
* @param str String to encode as UTF-8.
* @returns The number of bytes written
*/
utf8(str) {
const theoreticalMaxLength = str.length * 4;
if (theoreticalMaxLength < 168)
return this.utf8Native(str);
this.ensureCapacity(theoreticalMaxLength);
const maxLength = this.size - this.x;
if (utf8Write) {
const writeLength = utf8Write.call(this.uint8, str, this.x, maxLength);
this.x += writeLength;
return writeLength;
}
else if (from) {
const uint8 = this.uint8;
const offset = uint8.byteOffset + this.x;
const buf = from(uint8.buffer).subarray(offset, offset + maxLength);
const writeLength = buf.write(str, 0, maxLength, 'utf8');
this.x += writeLength;
return writeLength;
}
else if (theoreticalMaxLength > 1024 && textEncoder) {
const writeLength = textEncoder.encodeInto(str, this.uint8.subarray(this.x, this.x + maxLength)).written;
this.x += writeLength;
return writeLength;
}
return this.utf8Native(str);
}
utf8Native(str) {
const length = str.length;
const uint8 = this.uint8;
let offset = this.x;
let pos = 0;
while (pos < length) {
let value = str.charCodeAt(pos++);
if ((value & 0xffffff80) === 0) {
uint8[offset++] = value;
continue;
}
else if ((value & 0xfffff800) === 0) {
uint8[offset++] = ((value >> 6) & 0x1f) | 0xc0;
}
else {
if (value >= 0xd800 && value <= 0xdbff) {
if (pos < length) {
const extra = str.charCodeAt(pos);
if ((extra & 0xfc00) === 0xdc00) {
pos++;
value = ((value & 0x3ff) << 10) + (extra & 0x3ff) + 0x10000;
}
}
}
if ((value & 0xffff0000) === 0) {
uint8[offset++] = ((value >> 12) & 0x0f) | 0xe0;
uint8[offset++] = ((value >> 6) & 0x3f) | 0x80;
}
else {
uint8[offset++] = ((value >> 18) & 0x07) | 0xf0;
uint8[offset++] = ((value >> 12) & 0x3f) | 0x80;
uint8[offset++] = ((value >> 6) & 0x3f) | 0x80;
}
}
uint8[offset++] = (value & 0x3f) | 0x80;
}
const writeLength = offset - this.x;
this.x = offset;
return writeLength;
}
ascii(str) {
const length = str.length;
this.ensureCapacity(length);
const uint8 = this.uint8;
let x = this.x;
let pos = 0;
while (pos < length)
uint8[x++] = str.charCodeAt(pos++);
this.x = x;
}
}
exports.Writer = Writer;
//# sourceMappingURL=Writer.js.map