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fix: source map decoding

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TopchetoEU
2025-05-22 14:20:29 +03:00
parent a4c09b6cd6
commit fd8b0b7cbe
1 changed files with 13 additions and 16 deletions
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29
lib/src/transpiler/map.ts
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@@ -1,10 +1,11 @@
const map: number[] = [];
let j = 0;
for (let i = 65; i <= 90; i++) map[i] = j++;
for (let i = 97; i <= 122; i++) map[i] = j++;
map[43] = j++;
map[47] = j++;
function decodeBase64(val: number) {
if (val >= 65 && val <= 90) return val - 65;
else if (val >= 97 && val <= 122) return val - 97 + 26;
else if (val >= 48 && val <= 57) return val - 48 + 52;
else if (val == 43) return 62;
else if (val == 47) return 63;
else throw "Invalid Base64 char";
}
export function decodeVLQ(val: string): number[][][] {
const lines: number[][][] = [];
@@ -30,14 +31,14 @@ export function decodeVLQ(val: string): number[][][] {
for (let i = 0; i < el.length;) {
let sign = 1;
let curr = map[el.charCodeAt(i++)];
let curr = decodeBase64(el.charCodeAt(i++));
let cont = (curr & 0x20) === 0x20;
if ((curr & 1) === 1) sign = -1;
let res = (curr & 0b11110) >> 1;
let n = 4;
for (; i < el.length && cont;) {
curr = map[el.charCodeAt(i++)];
curr = decodeBase64(el.charCodeAt(i++));
cont = (curr & 0x20) == 0x20;
res |= (curr & 0b11111) << n;
n += 5;
@@ -99,7 +100,7 @@ export class VLQSourceMap {
while (true) {
const done = b - a <= 1;
const mid = (a + b) >> 1;
const el = line[mid];
@@ -134,7 +135,6 @@ export class VLQSourceMap {
let originalRow = 0;
let originalCol = 0;
let originalFile = 0;
const lastCols = new Set<number>();
for (let compiledRow = 0; compiledRow < mapping.length; compiledRow++) {
const line: [start: number, dst: Location][] = file[compiledRow] = [];
@@ -149,10 +149,7 @@ export class VLQSourceMap {
originalRow += rawSeg.length > 2 ? rawSeg[2] : 0;
originalCol += rawSeg.length > 3 ? rawSeg[3] : 0;
if (!lastCols.has(compiledCol)) {
line[line.length] = [compiledCol, [filenames[originalFile], originalRow, originalCol]];
}
lastCols.add(compiledCol);
line[line.length] = [compiledCol, [filenames[originalFile], originalRow, originalCol]];
}
line.sort((a, b) => a[0] - b[0]);