utils.es.js 11 KB

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