bc518174
 王天杨
提交两个项目文件
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import { comma, decodeInteger, encodeInteger, hasMoreVlq, semicolon } from './vlq';
import { StringWriter, StringReader } from './strings';
export {
decodeOriginalScopes,
encodeOriginalScopes,
decodeGeneratedRanges,
encodeGeneratedRanges,
} from './scopes';
export type { OriginalScope, GeneratedRange, CallSite, BindingExpressionRange } from './scopes';
export type SourceMapSegment =
| [number]
| [number, number, number, number]
| [number, number, number, number, number];
export type SourceMapLine = SourceMapSegment[];
export type SourceMapMappings = SourceMapLine[];
export function decode(mappings: string): SourceMapMappings {
const { length } = mappings;
const reader = new StringReader(mappings);
const decoded: SourceMapMappings = [];
let genColumn = 0;
let sourcesIndex = 0;
let sourceLine = 0;
let sourceColumn = 0;
let namesIndex = 0;
do {
const semi = reader.indexOf(';');
const line: SourceMapLine = [];
let sorted = true;
let lastCol = 0;
genColumn = 0;
while (reader.pos < semi) {
let seg: SourceMapSegment;
genColumn = decodeInteger(reader, genColumn);
if (genColumn < lastCol) sorted = false;
lastCol = genColumn;
if (hasMoreVlq(reader, semi)) {
sourcesIndex = decodeInteger(reader, sourcesIndex);
sourceLine = decodeInteger(reader, sourceLine);
sourceColumn = decodeInteger(reader, sourceColumn);
if (hasMoreVlq(reader, semi)) {
namesIndex = decodeInteger(reader, namesIndex);
seg = [genColumn, sourcesIndex, sourceLine, sourceColumn, namesIndex];
} else {
seg = [genColumn, sourcesIndex, sourceLine, sourceColumn];
}
} else {
seg = [genColumn];
}
line.push(seg);
reader.pos++;
}
if (!sorted) sort(line);
decoded.push(line);
reader.pos = semi + 1;
} while (reader.pos <= length);
return decoded;
}
function sort(line: SourceMapSegment[]) {
line.sort(sortComparator);
}
function sortComparator(a: SourceMapSegment, b: SourceMapSegment): number {
return a[0] - b[0];
}
export function encode(decoded: SourceMapMappings): string;
export function encode(decoded: Readonly<SourceMapMappings>): string;
export function encode(decoded: Readonly<SourceMapMappings>): string {
const writer = new StringWriter();
let sourcesIndex = 0;
let sourceLine = 0;
let sourceColumn = 0;
let namesIndex = 0;
for (let i = 0; i < decoded.length; i++) {
const line = decoded[i];
if (i > 0) writer.write(semicolon);
if (line.length === 0) continue;
let genColumn = 0;
for (let j = 0; j < line.length; j++) {
const segment = line[j];
if (j > 0) writer.write(comma);
genColumn = encodeInteger(writer, segment[0], genColumn);
if (segment.length === 1) continue;
sourcesIndex = encodeInteger(writer, segment[1], sourcesIndex);
sourceLine = encodeInteger(writer, segment[2], sourceLine);
sourceColumn = encodeInteger(writer, segment[3], sourceColumn);
if (segment.length === 4) continue;
namesIndex = encodeInteger(writer, segment[4], namesIndex);
}
}
return writer.flush();
}
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