Function _parseMap

deps/v8/tools/sourcemap.mjs:229–301

* @override

(map, lineNumber, columnNumber)

     * @override
     */
    _parseMap(map, lineNumber, columnNumber)
    {
        let sourceIndex = 0;
        let sourceLineNumber = 0;
        let sourceColumnNumber = 0;
        let nameIndex = 0;

        const sources = [];
        const originalToCanonicalURLMap = {};
        for (let i = 0; i < map.sources.length; ++i) {
            const originalSourceURL = map.sources[i];
            let sourceRoot = map.sourceRoot || "";
            if (sourceRoot && !sourceRoot.endsWith("/")) sourceRoot += "/";
            const href = sourceRoot + originalSourceURL;
            const url = WebInspector.ParsedURL.completeURL(this._sourceMappingURL, href) || href;
            originalToCanonicalURLMap[originalSourceURL] = url;
            sources.push(url);
            this._sources[url] = true;

            if (map.sourcesContent && map.sourcesContent[i]) {
                this._sourceContentByURL[url] = map.sourcesContent[i];
            }
        }

        const stringCharIterator = new WebInspector.SourceMap.StringCharIterator(map.mappings);
        let sourceURL = sources[sourceIndex];

        while (true) {
            if (stringCharIterator.peek() === ",")
                stringCharIterator.next();
            else {
                while (stringCharIterator.peek() === ";") {
                    lineNumber += 1;
                    columnNumber = 0;
                    stringCharIterator.next();
                }
                if (!stringCharIterator.hasNext())
                    break;
            }

            columnNumber += this._decodeVLQ(stringCharIterator);
            if (this._isSeparator(stringCharIterator.peek())) {
                this._mappings.push([lineNumber, columnNumber]);
                continue;
            }

            const sourceIndexDelta = this._decodeVLQ(stringCharIterator);
            if (sourceIndexDelta) {
                sourceIndex += sourceIndexDelta;
                sourceURL = sources[sourceIndex];
            }
            sourceLineNumber += this._decodeVLQ(stringCharIterator);
            sourceColumnNumber += this._decodeVLQ(stringCharIterator);
            if (!this._isSeparator(stringCharIterator.peek()))
                nameIndex += this._decodeVLQ(stringCharIterator);

            this._mappings.push([lineNumber, columnNumber, sourceURL, sourceLineNumber, sourceColumnNumber]);
        }