utils.js 12 KB

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  1. /*!
  2. Copyright (c) Peculiar Ventures, LLC
  3. */
  4. 'use strict';
  5. Object.defineProperty(exports, '__esModule', { value: true });
  6. function getUTCDate(date) {
  7. return new Date(date.getTime() + date.getTimezoneOffset() * 60000);
  8. }
  9. function getParametersValue(parameters, name, defaultValue) {
  10. var _a;
  11. if (parameters instanceof Object === false) {
  12. return defaultValue;
  13. }
  14. return (_a = parameters[name]) !== null && _a !== void 0 ? _a : defaultValue;
  15. }
  16. function bufferToHexCodes(inputBuffer, inputOffset = 0, inputLength = inputBuffer.byteLength - inputOffset, insertSpace = false) {
  17. let result = "";
  18. for (const item of new Uint8Array(inputBuffer, inputOffset, inputLength)) {
  19. const str = item.toString(16).toUpperCase();
  20. if (str.length === 1) {
  21. result += "0";
  22. }
  23. result += str;
  24. if (insertSpace) {
  25. result += " ";
  26. }
  27. }
  28. return result.trim();
  29. }
  30. function checkBufferParams(baseBlock, inputBuffer, inputOffset, inputLength) {
  31. if (!(inputBuffer instanceof ArrayBuffer)) {
  32. baseBlock.error = 'Wrong parameter: inputBuffer must be "ArrayBuffer"';
  33. return false;
  34. }
  35. if (!inputBuffer.byteLength) {
  36. baseBlock.error = "Wrong parameter: inputBuffer has zero length";
  37. return false;
  38. }
  39. if (inputOffset < 0) {
  40. baseBlock.error = "Wrong parameter: inputOffset less than zero";
  41. return false;
  42. }
  43. if (inputLength < 0) {
  44. baseBlock.error = "Wrong parameter: inputLength less than zero";
  45. return false;
  46. }
  47. if (inputBuffer.byteLength - inputOffset - inputLength < 0) {
  48. baseBlock.error =
  49. "End of input reached before message was fully decoded (inconsistent offset and length values)";
  50. return false;
  51. }
  52. return true;
  53. }
  54. function utilFromBase(inputBuffer, inputBase) {
  55. let result = 0;
  56. if (inputBuffer.length === 1) {
  57. return inputBuffer[0];
  58. }
  59. for (let i = inputBuffer.length - 1; i >= 0; i--) {
  60. result += inputBuffer[inputBuffer.length - 1 - i] * Math.pow(2, inputBase * i);
  61. }
  62. return result;
  63. }
  64. function utilToBase(value, base, reserved = -1) {
  65. const internalReserved = reserved;
  66. let internalValue = value;
  67. let result = 0;
  68. let biggest = Math.pow(2, base);
  69. for (let i = 1; i < 8; i++) {
  70. if (value < biggest) {
  71. let retBuf;
  72. if (internalReserved < 0) {
  73. retBuf = new ArrayBuffer(i);
  74. result = i;
  75. }
  76. else {
  77. if (internalReserved < i) {
  78. return new ArrayBuffer(0);
  79. }
  80. retBuf = new ArrayBuffer(internalReserved);
  81. result = internalReserved;
  82. }
  83. const retView = new Uint8Array(retBuf);
  84. for (let j = i - 1; j >= 0; j--) {
  85. const basis = Math.pow(2, j * base);
  86. retView[result - j - 1] = Math.floor(internalValue / basis);
  87. internalValue -= retView[result - j - 1] * basis;
  88. }
  89. return retBuf;
  90. }
  91. biggest *= Math.pow(2, base);
  92. }
  93. return new ArrayBuffer(0);
  94. }
  95. function utilConcatBuf(...buffers) {
  96. let outputLength = 0;
  97. let prevLength = 0;
  98. for (const buffer of buffers) {
  99. outputLength += buffer.byteLength;
  100. }
  101. const retBuf = new ArrayBuffer(outputLength);
  102. const retView = new Uint8Array(retBuf);
  103. for (const buffer of buffers) {
  104. retView.set(new Uint8Array(buffer), prevLength);
  105. prevLength += buffer.byteLength;
  106. }
  107. return retBuf;
  108. }
  109. function utilConcatView(...views) {
  110. let outputLength = 0;
  111. let prevLength = 0;
  112. for (const view of views) {
  113. outputLength += view.length;
  114. }
  115. const retBuf = new ArrayBuffer(outputLength);
  116. const retView = new Uint8Array(retBuf);
  117. for (const view of views) {
  118. retView.set(view, prevLength);
  119. prevLength += view.length;
  120. }
  121. return retView;
  122. }
  123. function utilDecodeTC() {
  124. const buf = new Uint8Array(this.valueHex);
  125. if (this.valueHex.byteLength >= 2) {
  126. const condition1 = buf[0] === 0xff && buf[1] & 0x80;
  127. const condition2 = buf[0] === 0x00 && (buf[1] & 0x80) === 0x00;
  128. if (condition1 || condition2) {
  129. this.warnings.push("Needlessly long format");
  130. }
  131. }
  132. const bigIntBuffer = new ArrayBuffer(this.valueHex.byteLength);
  133. const bigIntView = new Uint8Array(bigIntBuffer);
  134. for (let i = 0; i < this.valueHex.byteLength; i++) {
  135. bigIntView[i] = 0;
  136. }
  137. bigIntView[0] = buf[0] & 0x80;
  138. const bigInt = utilFromBase(bigIntView, 8);
  139. const smallIntBuffer = new ArrayBuffer(this.valueHex.byteLength);
  140. const smallIntView = new Uint8Array(smallIntBuffer);
  141. for (let j = 0; j < this.valueHex.byteLength; j++) {
  142. smallIntView[j] = buf[j];
  143. }
  144. smallIntView[0] &= 0x7f;
  145. const smallInt = utilFromBase(smallIntView, 8);
  146. return smallInt - bigInt;
  147. }
  148. function utilEncodeTC(value) {
  149. const modValue = value < 0 ? value * -1 : value;
  150. let bigInt = 128;
  151. for (let i = 1; i < 8; i++) {
  152. if (modValue <= bigInt) {
  153. if (value < 0) {
  154. const smallInt = bigInt - modValue;
  155. const retBuf = utilToBase(smallInt, 8, i);
  156. const retView = new Uint8Array(retBuf);
  157. retView[0] |= 0x80;
  158. return retBuf;
  159. }
  160. let retBuf = utilToBase(modValue, 8, i);
  161. let retView = new Uint8Array(retBuf);
  162. if (retView[0] & 0x80) {
  163. const tempBuf = retBuf.slice(0);
  164. const tempView = new Uint8Array(tempBuf);
  165. retBuf = new ArrayBuffer(retBuf.byteLength + 1);
  166. retView = new Uint8Array(retBuf);
  167. for (let k = 0; k < tempBuf.byteLength; k++) {
  168. retView[k + 1] = tempView[k];
  169. }
  170. retView[0] = 0x00;
  171. }
  172. return retBuf;
  173. }
  174. bigInt *= Math.pow(2, 8);
  175. }
  176. return new ArrayBuffer(0);
  177. }
  178. function isEqualBuffer(inputBuffer1, inputBuffer2) {
  179. if (inputBuffer1.byteLength !== inputBuffer2.byteLength) {
  180. return false;
  181. }
  182. const view1 = new Uint8Array(inputBuffer1);
  183. const view2 = new Uint8Array(inputBuffer2);
  184. for (let i = 0; i < view1.length; i++) {
  185. if (view1[i] !== view2[i]) {
  186. return false;
  187. }
  188. }
  189. return true;
  190. }
  191. function padNumber(inputNumber, fullLength) {
  192. const str = inputNumber.toString(10);
  193. if (fullLength < str.length) {
  194. return "";
  195. }
  196. const dif = fullLength - str.length;
  197. const padding = Array.from({ length: dif });
  198. for (let i = 0; i < dif; i++) {
  199. padding[i] = "0";
  200. }
  201. const paddingString = padding.join("");
  202. return paddingString.concat(str);
  203. }
  204. const base64Template = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
  205. const base64UrlTemplate = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_=";
  206. function toBase64(input, useUrlTemplate = false, skipPadding = false, skipLeadingZeros = false) {
  207. let i = 0;
  208. let flag1 = 0;
  209. let flag2 = 0;
  210. let output = "";
  211. const template = useUrlTemplate ? base64UrlTemplate : base64Template;
  212. if (skipLeadingZeros) {
  213. let nonZeroPosition = 0;
  214. for (let i = 0; i < input.length; i++) {
  215. if (input.charCodeAt(i) !== 0) {
  216. nonZeroPosition = i;
  217. break;
  218. }
  219. }
  220. input = input.slice(nonZeroPosition);
  221. }
  222. while (i < input.length) {
  223. const chr1 = input.charCodeAt(i++);
  224. if (i >= input.length) {
  225. flag1 = 1;
  226. }
  227. const chr2 = input.charCodeAt(i++);
  228. if (i >= input.length) {
  229. flag2 = 1;
  230. }
  231. const chr3 = input.charCodeAt(i++);
  232. const enc1 = chr1 >> 2;
  233. const enc2 = ((chr1 & 0x03) << 4) | (chr2 >> 4);
  234. let enc3 = ((chr2 & 0x0f) << 2) | (chr3 >> 6);
  235. let enc4 = chr3 & 0x3f;
  236. if (flag1 === 1) {
  237. enc3 = enc4 = 64;
  238. }
  239. else {
  240. if (flag2 === 1) {
  241. enc4 = 64;
  242. }
  243. }
  244. if (skipPadding) {
  245. if (enc3 === 64) {
  246. output += `${template.charAt(enc1)}${template.charAt(enc2)}`;
  247. }
  248. else {
  249. if (enc4 === 64) {
  250. output += `${template.charAt(enc1)}${template.charAt(enc2)}${template.charAt(enc3)}`;
  251. }
  252. else {
  253. output += `${template.charAt(enc1)}${template.charAt(enc2)}${template.charAt(enc3)}${template.charAt(enc4)}`;
  254. }
  255. }
  256. }
  257. else {
  258. output += `${template.charAt(enc1)}${template.charAt(enc2)}${template.charAt(enc3)}${template.charAt(enc4)}`;
  259. }
  260. }
  261. return output;
  262. }
  263. function fromBase64(input, useUrlTemplate = false, cutTailZeros = false) {
  264. const template = useUrlTemplate ? base64UrlTemplate : base64Template;
  265. function indexOf(toSearch) {
  266. for (let i = 0; i < 64; i++) {
  267. if (template.charAt(i) === toSearch)
  268. return i;
  269. }
  270. return 64;
  271. }
  272. function test(incoming) {
  273. return incoming === 64 ? 0x00 : incoming;
  274. }
  275. let i = 0;
  276. let output = "";
  277. while (i < input.length) {
  278. const enc1 = indexOf(input.charAt(i++));
  279. const enc2 = i >= input.length ? 0x00 : indexOf(input.charAt(i++));
  280. const enc3 = i >= input.length ? 0x00 : indexOf(input.charAt(i++));
  281. const enc4 = i >= input.length ? 0x00 : indexOf(input.charAt(i++));
  282. const chr1 = (test(enc1) << 2) | (test(enc2) >> 4);
  283. const chr2 = ((test(enc2) & 0x0f) << 4) | (test(enc3) >> 2);
  284. const chr3 = ((test(enc3) & 0x03) << 6) | test(enc4);
  285. output += String.fromCharCode(chr1);
  286. if (enc3 !== 64) {
  287. output += String.fromCharCode(chr2);
  288. }
  289. if (enc4 !== 64) {
  290. output += String.fromCharCode(chr3);
  291. }
  292. }
  293. if (cutTailZeros) {
  294. const outputLength = output.length;
  295. let nonZeroStart = -1;
  296. for (let i = outputLength - 1; i >= 0; i--) {
  297. if (output.charCodeAt(i) !== 0) {
  298. nonZeroStart = i;
  299. break;
  300. }
  301. }
  302. if (nonZeroStart !== -1) {
  303. output = output.slice(0, nonZeroStart + 1);
  304. }
  305. else {
  306. output = "";
  307. }
  308. }
  309. return output;
  310. }
  311. function arrayBufferToString(buffer) {
  312. let resultString = "";
  313. const view = new Uint8Array(buffer);
  314. for (const element of view) {
  315. resultString += String.fromCharCode(element);
  316. }
  317. return resultString;
  318. }
  319. function stringToArrayBuffer(str) {
  320. const stringLength = str.length;
  321. const resultBuffer = new ArrayBuffer(stringLength);
  322. const resultView = new Uint8Array(resultBuffer);
  323. for (let i = 0; i < stringLength; i++) {
  324. resultView[i] = str.charCodeAt(i);
  325. }
  326. return resultBuffer;
  327. }
  328. const log2 = Math.log(2);
  329. function nearestPowerOf2(length) {
  330. const base = Math.log(length) / log2;
  331. const floor = Math.floor(base);
  332. const round = Math.round(base);
  333. return floor === round ? floor : round;
  334. }
  335. function clearProps(object, propsArray) {
  336. for (const prop of propsArray) {
  337. delete object[prop];
  338. }
  339. }
  340. exports.arrayBufferToString = arrayBufferToString;
  341. exports.bufferToHexCodes = bufferToHexCodes;
  342. exports.checkBufferParams = checkBufferParams;
  343. exports.clearProps = clearProps;
  344. exports.fromBase64 = fromBase64;
  345. exports.getParametersValue = getParametersValue;
  346. exports.getUTCDate = getUTCDate;
  347. exports.isEqualBuffer = isEqualBuffer;
  348. exports.nearestPowerOf2 = nearestPowerOf2;
  349. exports.padNumber = padNumber;
  350. exports.stringToArrayBuffer = stringToArrayBuffer;
  351. exports.toBase64 = toBase64;
  352. exports.utilConcatBuf = utilConcatBuf;
  353. exports.utilConcatView = utilConcatView;
  354. exports.utilDecodeTC = utilDecodeTC;
  355. exports.utilEncodeTC = utilEncodeTC;
  356. exports.utilFromBase = utilFromBase;
  357. exports.utilToBase = utilToBase;