296 lines
7.7 KiB
JavaScript
296 lines
7.7 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.readCodePoint = readCodePoint;
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exports.readInt = readInt;
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exports.readStringContents = readStringContents;
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var _isDigit = function isDigit(code) {
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return code >= 48 && code <= 57;
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};
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const forbiddenNumericSeparatorSiblings = {
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decBinOct: new Set([46, 66, 69, 79, 95, 98, 101, 111]),
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hex: new Set([46, 88, 95, 120])
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};
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const isAllowedNumericSeparatorSibling = {
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bin: ch => ch === 48 || ch === 49,
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oct: ch => ch >= 48 && ch <= 55,
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dec: ch => ch >= 48 && ch <= 57,
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hex: ch => ch >= 48 && ch <= 57 || ch >= 65 && ch <= 70 || ch >= 97 && ch <= 102
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};
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function readStringContents(type, input, pos, lineStart, curLine, errors) {
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const initialPos = pos;
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const initialLineStart = lineStart;
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const initialCurLine = curLine;
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let out = "";
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let firstInvalidLoc = null;
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let chunkStart = pos;
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const {
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length
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} = input;
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for (;;) {
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if (pos >= length) {
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errors.unterminated(initialPos, initialLineStart, initialCurLine);
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out += input.slice(chunkStart, pos);
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break;
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}
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const ch = input.charCodeAt(pos);
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if (isStringEnd(type, ch, input, pos)) {
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out += input.slice(chunkStart, pos);
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break;
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}
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if (ch === 92) {
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out += input.slice(chunkStart, pos);
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const res = readEscapedChar(input, pos, lineStart, curLine, type === "template", errors);
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if (res.ch === null && !firstInvalidLoc) {
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firstInvalidLoc = {
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pos,
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lineStart,
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curLine
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};
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} else {
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out += res.ch;
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}
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({
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pos,
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lineStart,
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curLine
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} = res);
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chunkStart = pos;
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} else if (ch === 8232 || ch === 8233) {
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++pos;
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++curLine;
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lineStart = pos;
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} else if (ch === 10 || ch === 13) {
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if (type === "template") {
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out += input.slice(chunkStart, pos) + "\n";
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++pos;
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if (ch === 13 && input.charCodeAt(pos) === 10) {
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++pos;
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}
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++curLine;
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chunkStart = lineStart = pos;
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} else {
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errors.unterminated(initialPos, initialLineStart, initialCurLine);
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}
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} else {
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++pos;
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}
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}
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return {
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pos,
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str: out,
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firstInvalidLoc,
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lineStart,
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curLine,
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containsInvalid: !!firstInvalidLoc
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};
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}
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function isStringEnd(type, ch, input, pos) {
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if (type === "template") {
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return ch === 96 || ch === 36 && input.charCodeAt(pos + 1) === 123;
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}
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return ch === (type === "double" ? 34 : 39);
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}
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function readEscapedChar(input, pos, lineStart, curLine, inTemplate, errors) {
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const throwOnInvalid = !inTemplate;
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pos++;
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const res = ch => ({
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pos,
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ch,
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lineStart,
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curLine
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});
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const ch = input.charCodeAt(pos++);
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switch (ch) {
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case 110:
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return res("\n");
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case 114:
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return res("\r");
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case 120:
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{
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let code;
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({
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code,
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pos
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} = readHexChar(input, pos, lineStart, curLine, 2, false, throwOnInvalid, errors));
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return res(code === null ? null : String.fromCharCode(code));
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}
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case 117:
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{
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let code;
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({
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code,
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pos
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} = readCodePoint(input, pos, lineStart, curLine, throwOnInvalid, errors));
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return res(code === null ? null : String.fromCodePoint(code));
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}
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case 116:
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return res("\t");
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case 98:
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return res("\b");
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case 118:
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return res("\u000b");
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case 102:
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return res("\f");
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case 13:
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if (input.charCodeAt(pos) === 10) {
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++pos;
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}
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case 10:
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lineStart = pos;
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++curLine;
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case 8232:
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case 8233:
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return res("");
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case 56:
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case 57:
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if (inTemplate) {
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return res(null);
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} else {
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errors.strictNumericEscape(pos - 1, lineStart, curLine);
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}
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default:
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if (ch >= 48 && ch <= 55) {
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const startPos = pos - 1;
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const match = input.slice(startPos, pos + 2).match(/^[0-7]+/);
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let octalStr = match[0];
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let octal = parseInt(octalStr, 8);
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if (octal > 255) {
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octalStr = octalStr.slice(0, -1);
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octal = parseInt(octalStr, 8);
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}
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pos += octalStr.length - 1;
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const next = input.charCodeAt(pos);
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if (octalStr !== "0" || next === 56 || next === 57) {
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if (inTemplate) {
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return res(null);
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} else {
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errors.strictNumericEscape(startPos, lineStart, curLine);
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}
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}
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return res(String.fromCharCode(octal));
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}
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return res(String.fromCharCode(ch));
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}
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}
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function readHexChar(input, pos, lineStart, curLine, len, forceLen, throwOnInvalid, errors) {
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const initialPos = pos;
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let n;
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({
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n,
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pos
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} = readInt(input, pos, lineStart, curLine, 16, len, forceLen, false, errors, !throwOnInvalid));
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if (n === null) {
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if (throwOnInvalid) {
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errors.invalidEscapeSequence(initialPos, lineStart, curLine);
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} else {
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pos = initialPos - 1;
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}
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}
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return {
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code: n,
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pos
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};
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}
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function readInt(input, pos, lineStart, curLine, radix, len, forceLen, allowNumSeparator, errors, bailOnError) {
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const start = pos;
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const forbiddenSiblings = radix === 16 ? forbiddenNumericSeparatorSiblings.hex : forbiddenNumericSeparatorSiblings.decBinOct;
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const isAllowedSibling = radix === 16 ? isAllowedNumericSeparatorSibling.hex : radix === 10 ? isAllowedNumericSeparatorSibling.dec : radix === 8 ? isAllowedNumericSeparatorSibling.oct : isAllowedNumericSeparatorSibling.bin;
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let invalid = false;
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let total = 0;
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for (let i = 0, e = len == null ? Infinity : len; i < e; ++i) {
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const code = input.charCodeAt(pos);
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let val;
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if (code === 95 && allowNumSeparator !== "bail") {
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const prev = input.charCodeAt(pos - 1);
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const next = input.charCodeAt(pos + 1);
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if (!allowNumSeparator) {
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if (bailOnError) return {
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n: null,
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pos
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};
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errors.numericSeparatorInEscapeSequence(pos, lineStart, curLine);
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} else if (Number.isNaN(next) || !isAllowedSibling(next) || forbiddenSiblings.has(prev) || forbiddenSiblings.has(next)) {
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if (bailOnError) return {
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n: null,
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pos
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};
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errors.unexpectedNumericSeparator(pos, lineStart, curLine);
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}
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++pos;
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continue;
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}
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if (code >= 97) {
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val = code - 97 + 10;
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} else if (code >= 65) {
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val = code - 65 + 10;
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} else if (_isDigit(code)) {
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val = code - 48;
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} else {
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val = Infinity;
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}
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if (val >= radix) {
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if (val <= 9 && bailOnError) {
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return {
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n: null,
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pos
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};
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} else if (val <= 9 && errors.invalidDigit(pos, lineStart, curLine, radix)) {
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val = 0;
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} else if (forceLen) {
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val = 0;
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invalid = true;
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} else {
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break;
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}
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}
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++pos;
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total = total * radix + val;
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}
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if (pos === start || len != null && pos - start !== len || invalid) {
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return {
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n: null,
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pos
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};
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}
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return {
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n: total,
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pos
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};
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}
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function readCodePoint(input, pos, lineStart, curLine, throwOnInvalid, errors) {
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const ch = input.charCodeAt(pos);
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let code;
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if (ch === 123) {
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++pos;
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({
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code,
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pos
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} = readHexChar(input, pos, lineStart, curLine, input.indexOf("}", pos) - pos, true, throwOnInvalid, errors));
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++pos;
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if (code !== null && code > 0x10ffff) {
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if (throwOnInvalid) {
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errors.invalidCodePoint(pos, lineStart, curLine);
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} else {
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return {
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code: null,
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pos
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};
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}
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}
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} else {
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({
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code,
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pos
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} = readHexChar(input, pos, lineStart, curLine, 4, false, throwOnInvalid, errors));
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}
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return {
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code,
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pos
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};
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}
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//# sourceMappingURL=index.js.map
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