@bare-ts/lib
Version:
TypeScript library for BARE, a compact and simple binary-serialization format
51 lines (50 loc) • 1.68 kB
JavaScript
//! Copyright (c) 2022 Victorien Elvinger
//! Licensed under the MIT License (https://mit-license.org/)
import { check, reserve } from "../core/byte-cursor.js";
import { assert, DEV } from "../util/assert.js";
import { IS_LITTLE_ENDIAN_PLATFORM } from "../util/constants.js";
import { isU32 } from "../util/validator.js";
import { readFixedData } from "./data.js";
import { readI16, writeI16 } from "./fixed-primitive.js";
import { writeU8FixedArray } from "./u8-array.js";
import { readUintSafe32, writeUintSafe32 } from "./uint.js";
export const readI16FixedArray = IS_LITTLE_ENDIAN_PLATFORM
? readI16FixedArrayLe
: readI16FixedArrayBe;
export function readI16Array(bc) {
return readI16FixedArray(bc, readUintSafe32(bc));
}
function readI16FixedArrayLe(bc, len) {
if (DEV) {
assert(isU32(len));
}
const byteCount = len * 2;
return new Int16Array(readFixedData(bc, byteCount));
}
function readI16FixedArrayBe(bc, len) {
if (DEV) {
assert(isU32(len));
}
check(bc, len * 2);
const result = new Int16Array(len);
for (let i = 0; i < len; i++) {
result[i] = readI16(bc);
}
return result;
}
export const writeI16FixedArray = IS_LITTLE_ENDIAN_PLATFORM ? writeI16FixedArrayLe : writeI16FixedArrayBe;
export function writeI16Array(bc, x) {
writeUintSafe32(bc, x.length);
if (x.length > 0) {
writeI16FixedArray(bc, x);
}
}
function writeI16FixedArrayLe(bc, x) {
writeU8FixedArray(bc, new Uint8Array(x.buffer, x.byteOffset, x.byteLength));
}
function writeI16FixedArrayBe(bc, x) {
reserve(bc, x.length * 2);
for (let i = 0; i < x.length; i++) {
writeI16(bc, x[i]);
}
}