"use strict";Object.defineProperty(exports, "__esModule", { value: true });exports.stringToBytes = stringToBytes;exports.tarHeaderChecksumMatches = tarHeaderChecksumMatches;exports.uint32SyncSafeToken = void 0;var _tokenTypes = require("token-types");

function stringToBytes(string, encoding) {
  if (encoding === 'utf-16le') {
    const bytes = [];
    for (let index = 0; index < string.length; index++) {
      const code = string.charCodeAt(index); // eslint-disable-line unicorn/prefer-code-point
      bytes.push(code & 0xFF, code >> 8 & 0xFF); // High byte
    }

    return bytes;
  }

  if (encoding === 'utf-16be') {
    const bytes = [];
    for (let index = 0; index < string.length; index++) {
      const code = string.charCodeAt(index); // eslint-disable-line unicorn/prefer-code-point
      bytes.push(code >> 8 & 0xFF, code & 0xFF); // Low byte
    }

    return bytes;
  }

  return [...string].map((character) => character.charCodeAt(0)); // eslint-disable-line unicorn/prefer-code-point
}

/**
Checks whether the TAR checksum is valid.

@param {Uint8Array} arrayBuffer - The TAR header `[offset ... offset + 512]`.
@param {number} offset - TAR header offset.
@returns {boolean} `true` if the TAR checksum is valid, otherwise `false`.
*/
function tarHeaderChecksumMatches(arrayBuffer, offset = 0) {
  const readSum = Number.parseInt(new _tokenTypes.StringType(6).get(arrayBuffer, 148).replace(/\0.*$/, '').trim(), 8); // Read sum in header
  if (Number.isNaN(readSum)) {
    return false;
  }

  let sum = 8 * 0x20; // Initialize signed bit sum

  for (let index = offset; index < offset + 148; index++) {
    sum += arrayBuffer[index];
  }

  for (let index = offset + 156; index < offset + 512; index++) {
    sum += arrayBuffer[index];
  }

  return readSum === sum;
}

/**
ID3 UINT32 sync-safe tokenizer token.
28 bits (representing up to 256MB) integer, the msb is 0 to avoid "false syncsignals".
*/
const uint32SyncSafeToken = exports.uint32SyncSafeToken = {
  get: (buffer, offset) => buffer[offset + 3] & 0x7F | buffer[offset + 2] << 7 | buffer[offset + 1] << 14 | buffer[offset] << 21,
  len: 4
}; /* v9-d0c0283baa5f256c */