// loaders.gl
// SPDX-License-Identifier: MIT
// Copyright (c) vis.gl contributors

// From: https://gist.github.com/wqli78/1330293/6d85cc967f32cccfcbad94ae7d088a3dcfc14bd9
// CRC32 doesn't appear to be supported natively by crypto-js

// import {toBuffer} from '@loaders.gl/loader-utils';
// import {calculate as sse4calculate} from 'sse4_crc32';

/**
 * Calculates the CRC32C checksum of a string.
 */
export default class CRC32C {
  options;
  crc: number;

  constructor(options = {}) {
    this.options = options;
    this.crc = ~0;
  }

  update(arrayBuffer) {
    const byteArray = new Uint8Array(arrayBuffer);
    const CRC32_TABLE = getCRC32Table();
    for (let i = 0; i < byteArray.length; i++) {
      this.crc = CRC32_TABLE[(this.crc ^ byteArray[i]) & 0xff] ^ (this.crc >>> 8);
    }
    return this;
  }

  finalize() {
    this.crc = (this.crc ^ -1) >>> 0;
    return this.crc;
  }
}

/**
 * This code is a manual javascript translation of c code generated by
 * pycrc 0.7.1 (http://www.tty1.net/pycrc/). Command line used:
 * './pycrc.py --model=crc-32c --generate c --algorithm=table-driven'
 */

// Note: Using a typed array here doubles the speed of the cipher
const CRC32C_TABLE = Int32Array.of(
  0x00000000,
  0xf26b8303,
  0xe13b70f7,
  0x1350f3f4,
  0xc79a971f,
  0x35f1141c,
  0x26a1e7e8,
  0xd4ca64eb,
  0x8ad958cf,
  0x78b2dbcc,
  0x6be22838,
  0x9989ab3b,
  0x4d43cfd0,
  0xbf284cd3,
  0xac78bf27,
  0x5e133c24,
  0x105ec76f,
  0xe235446c,
  0xf165b798,
  0x030e349b,
  0xd7c45070,
  0x25afd373,
  0x36ff2087,
  0xc494a384,
  0x9a879fa0,
  0x68ec1ca3,
  0x7bbcef57,
  0x89d76c54,
  0x5d1d08bf,
  0xaf768bbc,
  0xbc267848,
  0x4e4dfb4b,
  0x20bd8ede,
  0xd2d60ddd,
  0xc186fe29,
  0x33ed7d2a,
  0xe72719c1,
  0x154c9ac2,
  0x061c6936,
  0xf477ea35,
  0xaa64d611,
  0x580f5512,
  0x4b5fa6e6,
  0xb93425e5,
  0x6dfe410e,
  0x9f95c20d,
  0x8cc531f9,
  0x7eaeb2fa,
  0x30e349b1,
  0xc288cab2,
  0xd1d83946,
  0x23b3ba45,
  0xf779deae,
  0x05125dad,
  0x1642ae59,
  0xe4292d5a,
  0xba3a117e,
  0x4851927d,
  0x5b016189,
  0xa96ae28a,
  0x7da08661,
  0x8fcb0562,
  0x9c9bf696,
  0x6ef07595,
  0x417b1dbc,
  0xb3109ebf,
  0xa0406d4b,
  0x522bee48,
  0x86e18aa3,
  0x748a09a0,
  0x67dafa54,
  0x95b17957,
  0xcba24573,
  0x39c9c670,
  0x2a993584,
  0xd8f2b687,
  0x0c38d26c,
  0xfe53516f,
  0xed03a29b,
  0x1f682198,
  0x5125dad3,
  0xa34e59d0,
  0xb01eaa24,
  0x42752927,
  0x96bf4dcc,
  0x64d4cecf,
  0x77843d3b,
  0x85efbe38,
  0xdbfc821c,
  0x2997011f,
  0x3ac7f2eb,
  0xc8ac71e8,
  0x1c661503,
  0xee0d9600,
  0xfd5d65f4,
  0x0f36e6f7,
  0x61c69362,
  0x93ad1061,
  0x80fde395,
  0x72966096,
  0xa65c047d,
  0x5437877e,
  0x4767748a,
  0xb50cf789,
  0xeb1fcbad,
  0x197448ae,
  0x0a24bb5a,
  0xf84f3859,
  0x2c855cb2,
  0xdeeedfb1,
  0xcdbe2c45,
  0x3fd5af46,
  0x7198540d,
  0x83f3d70e,
  0x90a324fa,
  0x62c8a7f9,
  0xb602c312,
  0x44694011,
  0x5739b3e5,
  0xa55230e6,
  0xfb410cc2,
  0x092a8fc1,
  0x1a7a7c35,
  0xe811ff36,
  0x3cdb9bdd,
  0xceb018de,
  0xdde0eb2a,
  0x2f8b6829,
  0x82f63b78,
  0x709db87b,
  0x63cd4b8f,
  0x91a6c88c,
  0x456cac67,
  0xb7072f64,
  0xa457dc90,
  0x563c5f93,
  0x082f63b7,
  0xfa44e0b4,
  0xe9141340,
  0x1b7f9043,
  0xcfb5f4a8,
  0x3dde77ab,
  0x2e8e845f,
  0xdce5075c,
  0x92a8fc17,
  0x60c37f14,
  0x73938ce0,
  0x81f80fe3,
  0x55326b08,
  0xa759e80b,
  0xb4091bff,
  0x466298fc,
  0x1871a4d8,
  0xea1a27db,
  0xf94ad42f,
  0x0b21572c,
  0xdfeb33c7,
  0x2d80b0c4,
  0x3ed04330,
  0xccbbc033,
  0xa24bb5a6,
  0x502036a5,
  0x4370c551,
  0xb11b4652,
  0x65d122b9,
  0x97baa1ba,
  0x84ea524e,
  0x7681d14d,
  0x2892ed69,
  0xdaf96e6a,
  0xc9a99d9e,
  0x3bc21e9d,
  0xef087a76,
  0x1d63f975,
  0x0e330a81,
  0xfc588982,
  0xb21572c9,
  0x407ef1ca,
  0x532e023e,
  0xa145813d,
  0x758fe5d6,
  0x87e466d5,
  0x94b49521,
  0x66df1622,
  0x38cc2a06,
  0xcaa7a905,
  0xd9f75af1,
  0x2b9cd9f2,
  0xff56bd19,
  0x0d3d3e1a,
  0x1e6dcdee,
  0xec064eed,
  0xc38d26c4,
  0x31e6a5c7,
  0x22b65633,
  0xd0ddd530,
  0x0417b1db,
  0xf67c32d8,
  0xe52cc12c,
  0x1747422f,
  0x49547e0b,
  0xbb3ffd08,
  0xa86f0efc,
  0x5a048dff,
  0x8ecee914,
  0x7ca56a17,
  0x6ff599e3,
  0x9d9e1ae0,
  0xd3d3e1ab,
  0x21b862a8,
  0x32e8915c,
  0xc083125f,
  0x144976b4,
  0xe622f5b7,
  0xf5720643,
  0x07198540,
  0x590ab964,
  0xab613a67,
  0xb831c993,
  0x4a5a4a90,
  0x9e902e7b,
  0x6cfbad78,
  0x7fab5e8c,
  0x8dc0dd8f,
  0xe330a81a,
  0x115b2b19,
  0x020bd8ed,
  0xf0605bee,
  0x24aa3f05,
  0xd6c1bc06,
  0xc5914ff2,
  0x37faccf1,
  0x69e9f0d5,
  0x9b8273d6,
  0x88d28022,
  0x7ab90321,
  0xae7367ca,
  0x5c18e4c9,
  0x4f48173d,
  0xbd23943e,
  0xf36e6f75,
  0x0105ec76,
  0x12551f82,
  0xe03e9c81,
  0x34f4f86a,
  0xc69f7b69,
  0xd5cf889d,
  0x27a40b9e,
  0x79b737ba,
  0x8bdcb4b9,
  0x988c474d,
  0x6ae7c44e,
  0xbe2da0a5,
  0x4c4623a6,
  0x5f16d052,
  0xad7d5351
);

function getCRC32Table() {
  return CRC32C_TABLE;
}