source: trip-planner-front/node_modules/jsonc-parser/lib/umd/impl/scanner.js@ fa375fe

Last change on this file since fa375fe was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit
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File size: 15.4 KB
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1(function (factory) {
2 if (typeof module === "object" && typeof module.exports === "object") {
3 var v = factory(require, exports);
4 if (v !== undefined) module.exports = v;
5 }
6 else if (typeof define === "function" && define.amd) {
7 define(["require", "exports"], factory);
8 }
9})(function (require, exports) {
10 /*---------------------------------------------------------------------------------------------
11 * Copyright (c) Microsoft Corporation. All rights reserved.
12 * Licensed under the MIT License. See License.txt in the project root for license information.
13 *--------------------------------------------------------------------------------------------*/
14 'use strict';
15 Object.defineProperty(exports, "__esModule", { value: true });
16 exports.createScanner = void 0;
17 /**
18 * Creates a JSON scanner on the given text.
19 * If ignoreTrivia is set, whitespaces or comments are ignored.
20 */
21 function createScanner(text, ignoreTrivia) {
22 if (ignoreTrivia === void 0) { ignoreTrivia = false; }
23 var len = text.length;
24 var pos = 0, value = '', tokenOffset = 0, token = 16 /* Unknown */, lineNumber = 0, lineStartOffset = 0, tokenLineStartOffset = 0, prevTokenLineStartOffset = 0, scanError = 0 /* None */;
25 function scanHexDigits(count, exact) {
26 var digits = 0;
27 var value = 0;
28 while (digits < count || !exact) {
29 var ch = text.charCodeAt(pos);
30 if (ch >= 48 /* _0 */ && ch <= 57 /* _9 */) {
31 value = value * 16 + ch - 48 /* _0 */;
32 }
33 else if (ch >= 65 /* A */ && ch <= 70 /* F */) {
34 value = value * 16 + ch - 65 /* A */ + 10;
35 }
36 else if (ch >= 97 /* a */ && ch <= 102 /* f */) {
37 value = value * 16 + ch - 97 /* a */ + 10;
38 }
39 else {
40 break;
41 }
42 pos++;
43 digits++;
44 }
45 if (digits < count) {
46 value = -1;
47 }
48 return value;
49 }
50 function setPosition(newPosition) {
51 pos = newPosition;
52 value = '';
53 tokenOffset = 0;
54 token = 16 /* Unknown */;
55 scanError = 0 /* None */;
56 }
57 function scanNumber() {
58 var start = pos;
59 if (text.charCodeAt(pos) === 48 /* _0 */) {
60 pos++;
61 }
62 else {
63 pos++;
64 while (pos < text.length && isDigit(text.charCodeAt(pos))) {
65 pos++;
66 }
67 }
68 if (pos < text.length && text.charCodeAt(pos) === 46 /* dot */) {
69 pos++;
70 if (pos < text.length && isDigit(text.charCodeAt(pos))) {
71 pos++;
72 while (pos < text.length && isDigit(text.charCodeAt(pos))) {
73 pos++;
74 }
75 }
76 else {
77 scanError = 3 /* UnexpectedEndOfNumber */;
78 return text.substring(start, pos);
79 }
80 }
81 var end = pos;
82 if (pos < text.length && (text.charCodeAt(pos) === 69 /* E */ || text.charCodeAt(pos) === 101 /* e */)) {
83 pos++;
84 if (pos < text.length && text.charCodeAt(pos) === 43 /* plus */ || text.charCodeAt(pos) === 45 /* minus */) {
85 pos++;
86 }
87 if (pos < text.length && isDigit(text.charCodeAt(pos))) {
88 pos++;
89 while (pos < text.length && isDigit(text.charCodeAt(pos))) {
90 pos++;
91 }
92 end = pos;
93 }
94 else {
95 scanError = 3 /* UnexpectedEndOfNumber */;
96 }
97 }
98 return text.substring(start, end);
99 }
100 function scanString() {
101 var result = '', start = pos;
102 while (true) {
103 if (pos >= len) {
104 result += text.substring(start, pos);
105 scanError = 2 /* UnexpectedEndOfString */;
106 break;
107 }
108 var ch = text.charCodeAt(pos);
109 if (ch === 34 /* doubleQuote */) {
110 result += text.substring(start, pos);
111 pos++;
112 break;
113 }
114 if (ch === 92 /* backslash */) {
115 result += text.substring(start, pos);
116 pos++;
117 if (pos >= len) {
118 scanError = 2 /* UnexpectedEndOfString */;
119 break;
120 }
121 var ch2 = text.charCodeAt(pos++);
122 switch (ch2) {
123 case 34 /* doubleQuote */:
124 result += '\"';
125 break;
126 case 92 /* backslash */:
127 result += '\\';
128 break;
129 case 47 /* slash */:
130 result += '/';
131 break;
132 case 98 /* b */:
133 result += '\b';
134 break;
135 case 102 /* f */:
136 result += '\f';
137 break;
138 case 110 /* n */:
139 result += '\n';
140 break;
141 case 114 /* r */:
142 result += '\r';
143 break;
144 case 116 /* t */:
145 result += '\t';
146 break;
147 case 117 /* u */:
148 var ch3 = scanHexDigits(4, true);
149 if (ch3 >= 0) {
150 result += String.fromCharCode(ch3);
151 }
152 else {
153 scanError = 4 /* InvalidUnicode */;
154 }
155 break;
156 default:
157 scanError = 5 /* InvalidEscapeCharacter */;
158 }
159 start = pos;
160 continue;
161 }
162 if (ch >= 0 && ch <= 0x1f) {
163 if (isLineBreak(ch)) {
164 result += text.substring(start, pos);
165 scanError = 2 /* UnexpectedEndOfString */;
166 break;
167 }
168 else {
169 scanError = 6 /* InvalidCharacter */;
170 // mark as error but continue with string
171 }
172 }
173 pos++;
174 }
175 return result;
176 }
177 function scanNext() {
178 value = '';
179 scanError = 0 /* None */;
180 tokenOffset = pos;
181 lineStartOffset = lineNumber;
182 prevTokenLineStartOffset = tokenLineStartOffset;
183 if (pos >= len) {
184 // at the end
185 tokenOffset = len;
186 return token = 17 /* EOF */;
187 }
188 var code = text.charCodeAt(pos);
189 // trivia: whitespace
190 if (isWhiteSpace(code)) {
191 do {
192 pos++;
193 value += String.fromCharCode(code);
194 code = text.charCodeAt(pos);
195 } while (isWhiteSpace(code));
196 return token = 15 /* Trivia */;
197 }
198 // trivia: newlines
199 if (isLineBreak(code)) {
200 pos++;
201 value += String.fromCharCode(code);
202 if (code === 13 /* carriageReturn */ && text.charCodeAt(pos) === 10 /* lineFeed */) {
203 pos++;
204 value += '\n';
205 }
206 lineNumber++;
207 tokenLineStartOffset = pos;
208 return token = 14 /* LineBreakTrivia */;
209 }
210 switch (code) {
211 // tokens: []{}:,
212 case 123 /* openBrace */:
213 pos++;
214 return token = 1 /* OpenBraceToken */;
215 case 125 /* closeBrace */:
216 pos++;
217 return token = 2 /* CloseBraceToken */;
218 case 91 /* openBracket */:
219 pos++;
220 return token = 3 /* OpenBracketToken */;
221 case 93 /* closeBracket */:
222 pos++;
223 return token = 4 /* CloseBracketToken */;
224 case 58 /* colon */:
225 pos++;
226 return token = 6 /* ColonToken */;
227 case 44 /* comma */:
228 pos++;
229 return token = 5 /* CommaToken */;
230 // strings
231 case 34 /* doubleQuote */:
232 pos++;
233 value = scanString();
234 return token = 10 /* StringLiteral */;
235 // comments
236 case 47 /* slash */:
237 var start = pos - 1;
238 // Single-line comment
239 if (text.charCodeAt(pos + 1) === 47 /* slash */) {
240 pos += 2;
241 while (pos < len) {
242 if (isLineBreak(text.charCodeAt(pos))) {
243 break;
244 }
245 pos++;
246 }
247 value = text.substring(start, pos);
248 return token = 12 /* LineCommentTrivia */;
249 }
250 // Multi-line comment
251 if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
252 pos += 2;
253 var safeLength = len - 1; // For lookahead.
254 var commentClosed = false;
255 while (pos < safeLength) {
256 var ch = text.charCodeAt(pos);
257 if (ch === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
258 pos += 2;
259 commentClosed = true;
260 break;
261 }
262 pos++;
263 if (isLineBreak(ch)) {
264 if (ch === 13 /* carriageReturn */ && text.charCodeAt(pos) === 10 /* lineFeed */) {
265 pos++;
266 }
267 lineNumber++;
268 tokenLineStartOffset = pos;
269 }
270 }
271 if (!commentClosed) {
272 pos++;
273 scanError = 1 /* UnexpectedEndOfComment */;
274 }
275 value = text.substring(start, pos);
276 return token = 13 /* BlockCommentTrivia */;
277 }
278 // just a single slash
279 value += String.fromCharCode(code);
280 pos++;
281 return token = 16 /* Unknown */;
282 // numbers
283 case 45 /* minus */:
284 value += String.fromCharCode(code);
285 pos++;
286 if (pos === len || !isDigit(text.charCodeAt(pos))) {
287 return token = 16 /* Unknown */;
288 }
289 // found a minus, followed by a number so
290 // we fall through to proceed with scanning
291 // numbers
292 case 48 /* _0 */:
293 case 49 /* _1 */:
294 case 50 /* _2 */:
295 case 51 /* _3 */:
296 case 52 /* _4 */:
297 case 53 /* _5 */:
298 case 54 /* _6 */:
299 case 55 /* _7 */:
300 case 56 /* _8 */:
301 case 57 /* _9 */:
302 value += scanNumber();
303 return token = 11 /* NumericLiteral */;
304 // literals and unknown symbols
305 default:
306 // is a literal? Read the full word.
307 while (pos < len && isUnknownContentCharacter(code)) {
308 pos++;
309 code = text.charCodeAt(pos);
310 }
311 if (tokenOffset !== pos) {
312 value = text.substring(tokenOffset, pos);
313 // keywords: true, false, null
314 switch (value) {
315 case 'true': return token = 8 /* TrueKeyword */;
316 case 'false': return token = 9 /* FalseKeyword */;
317 case 'null': return token = 7 /* NullKeyword */;
318 }
319 return token = 16 /* Unknown */;
320 }
321 // some
322 value += String.fromCharCode(code);
323 pos++;
324 return token = 16 /* Unknown */;
325 }
326 }
327 function isUnknownContentCharacter(code) {
328 if (isWhiteSpace(code) || isLineBreak(code)) {
329 return false;
330 }
331 switch (code) {
332 case 125 /* closeBrace */:
333 case 93 /* closeBracket */:
334 case 123 /* openBrace */:
335 case 91 /* openBracket */:
336 case 34 /* doubleQuote */:
337 case 58 /* colon */:
338 case 44 /* comma */:
339 case 47 /* slash */:
340 return false;
341 }
342 return true;
343 }
344 function scanNextNonTrivia() {
345 var result;
346 do {
347 result = scanNext();
348 } while (result >= 12 /* LineCommentTrivia */ && result <= 15 /* Trivia */);
349 return result;
350 }
351 return {
352 setPosition: setPosition,
353 getPosition: function () { return pos; },
354 scan: ignoreTrivia ? scanNextNonTrivia : scanNext,
355 getToken: function () { return token; },
356 getTokenValue: function () { return value; },
357 getTokenOffset: function () { return tokenOffset; },
358 getTokenLength: function () { return pos - tokenOffset; },
359 getTokenStartLine: function () { return lineStartOffset; },
360 getTokenStartCharacter: function () { return tokenOffset - prevTokenLineStartOffset; },
361 getTokenError: function () { return scanError; },
362 };
363 }
364 exports.createScanner = createScanner;
365 function isWhiteSpace(ch) {
366 return ch === 32 /* space */ || ch === 9 /* tab */ || ch === 11 /* verticalTab */ || ch === 12 /* formFeed */ ||
367 ch === 160 /* nonBreakingSpace */ || ch === 5760 /* ogham */ || ch >= 8192 /* enQuad */ && ch <= 8203 /* zeroWidthSpace */ ||
368 ch === 8239 /* narrowNoBreakSpace */ || ch === 8287 /* mathematicalSpace */ || ch === 12288 /* ideographicSpace */ || ch === 65279 /* byteOrderMark */;
369 }
370 function isLineBreak(ch) {
371 return ch === 10 /* lineFeed */ || ch === 13 /* carriageReturn */ || ch === 8232 /* lineSeparator */ || ch === 8233 /* paragraphSeparator */;
372 }
373 function isDigit(ch) {
374 return ch >= 48 /* _0 */ && ch <= 57 /* _9 */;
375 }
376});
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