Function sequencePoints

test/dotnet-parser-tests.ts:274–305

(points: Array<{offset: number; line: number | null; column?: number}>)

}

function sequencePoints(points: Array<{offset: number; line: number | null; column?: number}>) {
    // Emit a Portable PDB sequence-points blob.
    const chunks = [compressedUInt(0)]; // The local-signature token
    let previousOffset = 0;
    let previousLine = 0;
    let previousColumn = 0;
    let hasPrevious = false;

    for (const point of points) {
        chunks.push(compressedUInt(hasPrevious ? point.offset - previousOffset : point.offset));
        if (point.line === null) {
            // Hidden sequence point: delta lines and delta columns are both zero, and no source span follows.
            chunks.push(compressedUInt(0), compressedUInt(0));
        } else {
            // Visible points in this fixture are one-column spans on a single source line.
            chunks.push(compressedUInt(0), compressedUInt(1));
            if (hasPrevious) {
                chunks.push(compressedSignedInt(point.line - previousLine));
                chunks.push(compressedSignedInt((point.column ?? 1) - previousColumn));
            } else {
                chunks.push(compressedUInt(point.line), compressedUInt(point.column ?? 1));
            }
            previousLine = point.line;
            previousColumn = point.column ?? 1;
        }

        previousOffset = point.offset;
        hasPrevious = true;
    }

    return Buffer.concat(chunks);
}

function ecma335Fixture() {
    // Build a tiny ECMA-335 metadata root plus matching portable-PDB metadata.