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import {Writer} from '@jsonjoy.com/buffers/lib/Writer';
import type {JsonPackExtension} from '../JsonPackExtension';
import type {BinaryJsonEncoder, TlvBinaryJsonEncoder} from '../types';
import type {IMessagePackEncoder} from './types';
/**
* @category Encoder
*/
export class MsgPackEncoderFast<W extends IWriter & IWriterGrowable = IWriter & IWriterGrowable>
implements IMessagePackEncoder, BinaryJsonEncoder, TlvBinaryJsonEncoder
{
constructor(public readonly writer: W = new Writer() as any) {}
/**
* Use this method to encode a JavaScript document into MessagePack format.
*
* @param json JSON value to encode.
* @returns Encoded memory buffer with MessagePack contents.
*/
public encode(json: unknown): Uint8Array {
this.writer.reset();
this.writeAny(json);
return this.writer.flush();
}
/** @deprecated */
public encodeAny(json: unknown): void {
this.writeAny(json);
}
public writeAny(value: unknown): void {
switch (value) {
case null:
return this.writer.u8(0xc0);
case false:
return this.writer.u8(0xc2);
case true:
return this.writer.u8(0xc3);
}
if (value instanceof Array) return this.writeArr(value);
switch (typeof value) {
case 'number':
return this.writeNumber(value);
case 'string':
return this.writeStr(value);
case 'object':
return this.writeObj(value as Record<string, unknown>);
}
}
/** @deprecated */
protected encodeFloat64(num: number): void {
this.writeFloat(num);
}
public writeNull(): void {
return this.writer.u8(0xc0);
}
public writeFloat(float: number): void {
this.writer.u8f64(0xcb, float);
}
public u32(num: number): void {
const writer = this.writer;
this.writer.ensureCapacity(5);
const uint8 = writer.uint8;
if (num <= 0b1111111) {
uint8[writer.x++] = num;
// Commenting this out improves performance, there is not much space savings.
// } else if (num <= 0xff) {
// uint8[writer.x++] = 0xcc;
// uint8[writer.x++] = num;
} else if (num <= 0xffff) {
uint8[writer.x++] = 0xcd;
writer.view.setUint16(writer.x, num);
writer.x += 2;
} else if (num <= 0xffffffff) {
uint8[writer.x++] = 0xce;
writer.view.setUint32(writer.x, num);
writer.x += 4;
} else Ethis.writeFloat(num);
}
public n32(num: number): void {
const writer = this.writer;
this.writer.ensureCapacity(5);
const uint8 = writer.uint8;
if (num >= -0x20) {
uint8[writer.x++] = 0x100 + num;
// Commenting this out improves performance, there is not much space savings.
// } else if (num >= -0x80) {
// uint8[writer.x++] = 0xd0;
// uint8[writer.x++] = num + 0x100;
} else if (num >= -0x8000) {
uint8[writer.x++] = 0xd1;
writer.view.setInt16(writer.x, num);
writer.x += 2;
} else if (num >= -0x80000000) {
uint8[writer.x++] = 0xd2;
writer.view.setInt32(writer.x, num);
writer.x += 4;
} else Ethis.writeFloat(num);
}
/** @deprecated */
public encodeNumber(num: number): void {
this.writeNumber(num);
}
public writeNumber(num: number): void {
if (num >>> 0 === num) return this.u32(num);
if (num >> 0 === num) return this.n32(num);
this.writeFloat(num);
}
public writeInteger(int: number): void {
Iif (int >= 0)
if (int <= 0xffffffff) return this.u32(int);
else Iif (int > -0x80000000) return this.n32(int);
this.writeFloat(int);
}
public writeUInteger(uint: number): void {
Iif (uint <= 0xffffffff) return this.u32(uint);
this.writeFloat(uint);
}
public encodeNull(): void {
this.writer.u8(0xc0);
}
public encodeTrue(): void {
this.writer.u8(0xc3);
}
public encodeFalse(): void {
this.writer.u8(0xc2);
}
/** @deprecated */
public encodeBoolean(bool: boolean): void {
this.writeBoolean(bool);
}
public writeBoolean(bool: boolean): void {
if (bool) this.writer.u8(0xc3);
else this.writer.u8(0xc2);
}
/** @deprecated */
public encodeStringHeader(length: number): void {
this.writeStrHdr(length);
}
public writeStrHdr(length: number): void {
if (length <= 0b11111) this.writer.u8(0b10100000 | length);
else if (length <= 0xff) this.writer.u16(0xd900 + length);
else if (length <= 0xffff) this.writer.u8u16(0xda, length);
else this.writer.u8u32(0xdb, length);
}
/** @deprecated */
public encodeString(str: string) {
this.writeStr(str);
}
public writeStr(str: string): void {
const writer = this.writer;
const length = str.length;
const maxSize = length * 4;
writer.ensureCapacity(5 + maxSize);
const uint8 = writer.uint8;
let lengthOffset: number = writer.x;
if (maxSize <= 0b11111) writer.x++;
else if (maxSize <= 0xff) {
uint8[writer.x++] = 0xd9;
lengthOffset = writer.x;
writer.x++;
} else if (maxSize <= 0xffff) {
uint8[writer.x++] = 0xda;
lengthOffset = writer.x;
writer.x += 2;
} else {
uint8[writer.x++] = 0xdb;
lengthOffset = writer.x;
writer.x += 4;
}
const bytesWritten = this.writer.utf8(str);
if (maxSize <= 0b11111) uint8[lengthOffset] = 0b10100000 | bytesWritten;
else if (maxSize <= 0xff) uint8[lengthOffset] = bytesWritten;
else if (maxSize <= 0xffff) writer.view.setUint16(lengthOffset, bytesWritten);
else writer.view.setUint32(lengthOffset, bytesWritten);
}
/** @deprecated */
public encodeAsciiString(str: string) {
this.writeAsciiStr(str);
}
public writeAsciiStr(str: string): void {
this.writeStrHdr(str.length);
this.writer.ascii(str);
}
/** @deprecated */
public encodeArrayHeader(length: number): void {
this.writeArrHdr(length);
}
/** @deprecated */
public encodeArray(arr: unknown[]): void {
this.writeArr(arr);
}
public writeArrHdr(length: number): void {
if (length <= 0b1111) this.writer.u8(0b10010000 | length);
else if (length <= 0xffff) this.writer.u8u16(0xdc, length);
else Iif (length <= 0xffffffff) this.writer.u8u32(0xdd, length);
}
public writeArr(arr: unknown[]): void {
const length = arr.length;
if (length <= 0b1111) this.writer.u8(0b10010000 | length);
else if (length <= 0xffff) this.writer.u8u16(0xdc, length);
else if (length <= 0xffffffff) this.writer.u8u32(0xdd, length);
// else return;
for (let i = 0; i < length; i++) this.writeAny(arr[i]);
}
/** @deprecated */
public encodeObjectHeader(length: number): void {
this.writeObjHdr(length);
}
/** @deprecated */
public encodeObject(obj: Record<string, unknown>): void {
this.writeObj(obj);
}
public writeObjHdr(length: number): void {
if (length <= 0b1111) this.writer.u8(0b10000000 | length);
else if (length <= 0xffff) {
this.writer.u8u16(0xde, length);
} else if (length <= 0xffffffff) {
this.writer.u8u32(0xdf, length);
}
}
public writeObj(obj: Record<string, unknown>): void {
const keys = Object.keys(obj);
const length = keys.length;
this.writeObjHdr(length);
for (let i = 0; i < length; i++) {
const key = keys[i];
this.writeStr(key);
this.writeAny(obj[key]);
}
}
public encodeExtHeader(type: number, length: number) {
switch (length) {
case 1:
this.writer.u16((0xd4 << 8) | type);
break;
case 2:
this.writer.u16((0xd5 << 8) | type);
break;
case 4:
this.writer.u16((0xd6 << 8) | type);
break;
case 8:
this.writer.u16((0xd7 << 8) | type);
break;
case 16:
this.writer.u16((0xd8 << 8) | type);
break;
default:
if (length <= 0xff) {
this.writer.u16((0xc7 << 8) | length);
this.writer.u8(type);
} else if (length <= 0xffff) {
this.writer.u8u16(0xc8, length);
this.writer.u8(type);
} else if (length <= 0xffffffff) {
this.writer.u8u32(0xc9, length);
this.writer.u8(type);
}
}
}
public encodeExt(ext: JsonPackExtension): void {
const {tag: type, val: buf} = ext;
const length = buf.length;
this.encodeExtHeader(type, length);
this.writer.buf(buf, length);
}
/** @deprecated */
public encodeBinaryHeader(length: number): void {
this.writeBinHdr(length);
}
/** @deprecated */
public encodeBinary(buf: Uint8Array): void {
this.writeBin(buf);
}
public writeBinHdr(length: number): void {
if (length <= 0xff) this.writer.u16((0xc4 << 8) | length);
else if (length <= 0xffff) {
this.writer.u8u16(0xc5, length);
} else if (length <= 0xffffffff) {
this.writer.u8u32(0xc6, length);
}
}
public writeBin(buf: Uint8Array): void {
const length = buf.length;
this.writeBinHdr(length);
this.writer.buf(buf, length);
}
}
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