✏️ Editing: trace-mapping.mjs

import { encode, decode } from '@jridgewell/sourcemap-codec';
import resolveUri from '@jridgewell/resolve-uri';

function resolve(input, base) {
    // The base is always treated as a directory, if it's not empty.
    // https://github.com/mozilla/source-map/blob/8cb3ee57/lib/util.js#L327
    // https://github.com/chromium/chromium/blob/da4adbb3/third_party/blink/renderer/devtools/front_end/sdk/SourceMap.js#L400-L401
    if (base && !base.endsWith('/'))
        base += '/';
    return resolveUri(input, base);
}

/**
 * Removes everything after the last "/", but leaves the slash.
 */
function stripFilename(path) {
    if (!path)
        return '';
    const index = path.lastIndexOf('/');
    return path.slice(0, index + 1);
}

const COLUMN = 0;
const SOURCES_INDEX = 1;
const SOURCE_LINE = 2;
const SOURCE_COLUMN = 3;
const NAMES_INDEX = 4;
const REV_GENERATED_LINE = 1;
const REV_GENERATED_COLUMN = 2;

// Rebuilds the original source files, with mappings that are ordered by source line/column instead
// of generated line/column.
function buildBySources(decoded, memos) {
    const sources = memos.map(buildNullArray);
    for (let i = 0; i < decoded.length; i++) {
        const line = decoded[i];
        for (let j = 0; j < line.length; j++) {
            const seg = line[j];
            if (seg.length === 1)
                continue;
            const sourceIndex = seg[SOURCES_INDEX];
            const sourceLine = seg[SOURCE_LINE];
            const sourceColumn = seg[SOURCE_COLUMN];
            const originalSource = sources[sourceIndex];
            const originalLine = (originalSource[sourceLine] || (originalSource[sourceLine] = []));
            const memo = memos[sourceIndex];
            // The binary search either found a match, or it found the left-index just before where the
            // segment should go. Either way, we want to insert after that. And there may be multiple
            // generated segments associated with an original location, so there may need to move several
            // indexes before we find where we need to insert.
            const index = upperBound(originalLine, sourceColumn, memoizedBinarySearch(originalLine, sourceColumn, memo, sourceLine));
            insert(originalLine, (memo.lastIndex = index + 1), [sourceColumn, i, seg[COLUMN]]);
        }
    }
    return sources;
}
function insert(array, index, value) {
    for (let i = array.length; i > index; i--) {
        array[i] = array[i - 1];
    }
    array[index] = value;
}
// Null arrays allow us to use ordered index keys without actually allocating contiguous memory like
// a real array. We use a null-prototype object to avoid prototype pollution and deoptimizations.
// Numeric properties on objects are magically sorted in ascending order by the engine regardless of
// the insertion order. So, by setting any numeric keys, even out of order, we'll get ascending
// order when iterating with for-in.
function buildNullArray() {
    return { __proto__: null };
}

export { AnyMap, GREATEST_LOWER_BOUND, LEAST_UPPER_BOUND, TraceMap, allGeneratedPositionsFor, decodedMap, decodedMappings, eachMapping, encodedMap, encodedMappings, generatedPositionFor, originalPositionFor, presortedDecodedMap, sourceContentFor, traceSegment };
//# sourceMappingURL=trace-mapping.mjs.map

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Ubuntu

Sid Gifari From Gifari Industries - BD Cyber Security Team