utils.es.js 12 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 = "End of input reached before message was fully decoded (inconsistent offset and length values)";
  47. return false;
  48. }
  49. return true;
  50. }
  51. function utilFromBase(inputBuffer, inputBase) {
  52. let result = 0;
  53. if (inputBuffer.length === 1) {
  54. return inputBuffer[0];
  55. }
  56. for (let i = (inputBuffer.length - 1); i >= 0; i--) {
  57. result += inputBuffer[(inputBuffer.length - 1) - i] * Math.pow(2, inputBase * i);
  58. }
  59. return result;
  60. }
  61. function utilToBase(value, base, reserved = (-1)) {
  62. const internalReserved = reserved;
  63. let internalValue = value;
  64. let result = 0;
  65. let biggest = Math.pow(2, base);
  66. for (let i = 1; i < 8; i++) {
  67. if (value < biggest) {
  68. let retBuf;
  69. if (internalReserved < 0) {
  70. retBuf = new ArrayBuffer(i);
  71. result = i;
  72. }
  73. else {
  74. if (internalReserved < i) {
  75. return (new ArrayBuffer(0));
  76. }
  77. retBuf = new ArrayBuffer(internalReserved);
  78. result = internalReserved;
  79. }
  80. const retView = new Uint8Array(retBuf);
  81. for (let j = (i - 1); j >= 0; j--) {
  82. const basis = Math.pow(2, j * base);
  83. retView[result - j - 1] = Math.floor(internalValue / basis);
  84. internalValue -= (retView[result - j - 1]) * basis;
  85. }
  86. return retBuf;
  87. }
  88. biggest *= Math.pow(2, base);
  89. }
  90. return new ArrayBuffer(0);
  91. }
  92. function utilConcatBuf(...buffers) {
  93. let outputLength = 0;
  94. let prevLength = 0;
  95. for (const buffer of buffers) {
  96. outputLength += buffer.byteLength;
  97. }
  98. const retBuf = new ArrayBuffer(outputLength);
  99. const retView = new Uint8Array(retBuf);
  100. for (const buffer of buffers) {
  101. retView.set(new Uint8Array(buffer), prevLength);
  102. prevLength += buffer.byteLength;
  103. }
  104. return retBuf;
  105. }
  106. function utilConcatView(...views) {
  107. let outputLength = 0;
  108. let prevLength = 0;
  109. for (const view of views) {
  110. outputLength += view.length;
  111. }
  112. const retBuf = new ArrayBuffer(outputLength);
  113. const retView = new Uint8Array(retBuf);
  114. for (const view of views) {
  115. retView.set(view, prevLength);
  116. prevLength += view.length;
  117. }
  118. return retView;
  119. }
  120. function utilDecodeTC() {
  121. const buf = new Uint8Array(this.valueHex);
  122. if (this.valueHex.byteLength >= 2) {
  123. const condition1 = (buf[0] === 0xFF) && (buf[1] & 0x80);
  124. const condition2 = (buf[0] === 0x00) && ((buf[1] & 0x80) === 0x00);
  125. if (condition1 || condition2) {
  126. this.warnings.push("Needlessly long format");
  127. }
  128. }
  129. const bigIntBuffer = new ArrayBuffer(this.valueHex.byteLength);
  130. const bigIntView = new Uint8Array(bigIntBuffer);
  131. for (let i = 0; i < this.valueHex.byteLength; i++) {
  132. bigIntView[i] = 0;
  133. }
  134. bigIntView[0] = (buf[0] & 0x80);
  135. const bigInt = utilFromBase(bigIntView, 8);
  136. const smallIntBuffer = new ArrayBuffer(this.valueHex.byteLength);
  137. const smallIntView = new Uint8Array(smallIntBuffer);
  138. for (let j = 0; j < this.valueHex.byteLength; j++) {
  139. smallIntView[j] = buf[j];
  140. }
  141. smallIntView[0] &= 0x7F;
  142. const smallInt = utilFromBase(smallIntView, 8);
  143. return (smallInt - bigInt);
  144. }
  145. function utilEncodeTC(value) {
  146. const modValue = (value < 0) ? (value * (-1)) : value;
  147. let bigInt = 128;
  148. for (let i = 1; i < 8; i++) {
  149. if (modValue <= bigInt) {
  150. if (value < 0) {
  151. const smallInt = bigInt - modValue;
  152. const retBuf = utilToBase(smallInt, 8, i);
  153. const retView = new Uint8Array(retBuf);
  154. retView[0] |= 0x80;
  155. return retBuf;
  156. }
  157. let retBuf = utilToBase(modValue, 8, i);
  158. let retView = new Uint8Array(retBuf);
  159. if (retView[0] & 0x80) {
  160. const tempBuf = retBuf.slice(0);
  161. const tempView = new Uint8Array(tempBuf);
  162. retBuf = new ArrayBuffer(retBuf.byteLength + 1);
  163. retView = new Uint8Array(retBuf);
  164. for (let k = 0; k < tempBuf.byteLength; k++) {
  165. retView[k + 1] = tempView[k];
  166. }
  167. retView[0] = 0x00;
  168. }
  169. return retBuf;
  170. }
  171. bigInt *= Math.pow(2, 8);
  172. }
  173. return (new ArrayBuffer(0));
  174. }
  175. function isEqualBuffer(inputBuffer1, inputBuffer2) {
  176. if (inputBuffer1.byteLength !== inputBuffer2.byteLength) {
  177. return false;
  178. }
  179. const view1 = new Uint8Array(inputBuffer1);
  180. const view2 = new Uint8Array(inputBuffer2);
  181. for (let i = 0; i < view1.length; i++) {
  182. if (view1[i] !== view2[i]) {
  183. return false;
  184. }
  185. }
  186. return true;
  187. }
  188. function padNumber(inputNumber, fullLength) {
  189. const str = inputNumber.toString(10);
  190. if (fullLength < str.length) {
  191. return "";
  192. }
  193. const dif = fullLength - str.length;
  194. const padding = new Array(dif);
  195. for (let i = 0; i < dif; i++) {
  196. padding[i] = "0";
  197. }
  198. const paddingString = padding.join("");
  199. return paddingString.concat(str);
  200. }
  201. const base64Template = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
  202. const base64UrlTemplate = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_=";
  203. function toBase64(input, useUrlTemplate = false, skipPadding = false, skipLeadingZeros = false) {
  204. let i = 0;
  205. let flag1 = 0;
  206. let flag2 = 0;
  207. let output = "";
  208. const template = (useUrlTemplate) ? base64UrlTemplate : base64Template;
  209. if (skipLeadingZeros) {
  210. let nonZeroPosition = 0;
  211. for (let i = 0; i < input.length; i++) {
  212. if (input.charCodeAt(i) !== 0) {
  213. nonZeroPosition = i;
  214. break;
  215. }
  216. }
  217. input = input.slice(nonZeroPosition);
  218. }
  219. while (i < input.length) {
  220. const chr1 = input.charCodeAt(i++);
  221. if (i >= input.length) {
  222. flag1 = 1;
  223. }
  224. const chr2 = input.charCodeAt(i++);
  225. if (i >= input.length) {
  226. flag2 = 1;
  227. }
  228. const chr3 = input.charCodeAt(i++);
  229. const enc1 = chr1 >> 2;
  230. const enc2 = ((chr1 & 0x03) << 4) | (chr2 >> 4);
  231. let enc3 = ((chr2 & 0x0F) << 2) | (chr3 >> 6);
  232. let enc4 = chr3 & 0x3F;
  233. if (flag1 === 1) {
  234. enc3 = enc4 = 64;
  235. }
  236. else {
  237. if (flag2 === 1) {
  238. enc4 = 64;
  239. }
  240. }
  241. if (skipPadding) {
  242. if (enc3 === 64) {
  243. output += `${template.charAt(enc1)}${template.charAt(enc2)}`;
  244. }
  245. else {
  246. if (enc4 === 64) {
  247. output += `${template.charAt(enc1)}${template.charAt(enc2)}${template.charAt(enc3)}`;
  248. }
  249. else {
  250. output += `${template.charAt(enc1)}${template.charAt(enc2)}${template.charAt(enc3)}${template.charAt(enc4)}`;
  251. }
  252. }
  253. }
  254. else {
  255. output += `${template.charAt(enc1)}${template.charAt(enc2)}${template.charAt(enc3)}${template.charAt(enc4)}`;
  256. }
  257. }
  258. return output;
  259. }
  260. function fromBase64(input, useUrlTemplate = false, cutTailZeros = false) {
  261. const template = (useUrlTemplate) ? base64UrlTemplate : base64Template;
  262. function indexOf(toSearch) {
  263. for (let i = 0; i < 64; i++) {
  264. if (template.charAt(i) === toSearch)
  265. return i;
  266. }
  267. return 64;
  268. }
  269. function test(incoming) {
  270. return ((incoming === 64) ? 0x00 : incoming);
  271. }
  272. let i = 0;
  273. let output = "";
  274. while (i < input.length) {
  275. const enc1 = indexOf(input.charAt(i++));
  276. const enc2 = (i >= input.length) ? 0x00 : indexOf(input.charAt(i++));
  277. const enc3 = (i >= input.length) ? 0x00 : indexOf(input.charAt(i++));
  278. const enc4 = (i >= input.length) ? 0x00 : indexOf(input.charAt(i++));
  279. const chr1 = (test(enc1) << 2) | (test(enc2) >> 4);
  280. const chr2 = ((test(enc2) & 0x0F) << 4) | (test(enc3) >> 2);
  281. const chr3 = ((test(enc3) & 0x03) << 6) | test(enc4);
  282. output += String.fromCharCode(chr1);
  283. if (enc3 !== 64) {
  284. output += String.fromCharCode(chr2);
  285. }
  286. if (enc4 !== 64) {
  287. output += String.fromCharCode(chr3);
  288. }
  289. }
  290. if (cutTailZeros) {
  291. const outputLength = output.length;
  292. let nonZeroStart = (-1);
  293. for (let i = (outputLength - 1); i >= 0; i--) {
  294. if (output.charCodeAt(i) !== 0) {
  295. nonZeroStart = i;
  296. break;
  297. }
  298. }
  299. if (nonZeroStart !== (-1)) {
  300. output = output.slice(0, nonZeroStart + 1);
  301. }
  302. else {
  303. output = "";
  304. }
  305. }
  306. return output;
  307. }
  308. function arrayBufferToString(buffer) {
  309. let resultString = "";
  310. const view = new Uint8Array(buffer);
  311. for (const element of view) {
  312. resultString += String.fromCharCode(element);
  313. }
  314. return resultString;
  315. }
  316. function stringToArrayBuffer(str) {
  317. const stringLength = str.length;
  318. const resultBuffer = new ArrayBuffer(stringLength);
  319. const resultView = new Uint8Array(resultBuffer);
  320. for (let i = 0; i < stringLength; i++) {
  321. resultView[i] = str.charCodeAt(i);
  322. }
  323. return resultBuffer;
  324. }
  325. const log2 = Math.log(2);
  326. function nearestPowerOf2(length) {
  327. const base = (Math.log(length) / log2);
  328. const floor = Math.floor(base);
  329. const round = Math.round(base);
  330. return ((floor === round) ? floor : round);
  331. }
  332. function clearProps(object, propsArray) {
  333. for (const prop of propsArray) {
  334. delete object[prop];
  335. }
  336. }
  337. export { arrayBufferToString, bufferToHexCodes, checkBufferParams, clearProps, fromBase64, getParametersValue, getUTCDate, isEqualBuffer, nearestPowerOf2, padNumber, stringToArrayBuffer, toBase64, utilConcatBuf, utilConcatView, utilDecodeTC, utilEncodeTC, utilFromBase, utilToBase };