type Preprocessor = (doc: string) => string;

export const preprocess: Preprocessor = (doc) => {
	const processors: Preprocessor[] = [replaceCrToLf];
	let result = doc;
	for (const processor of processors) {
		result = processor(result);
	}
	return result;
};

const replaceCrToLf: Preprocessor = (doc) => {
	return doc.replace(/(\r)(?!\n)/gmu, "\n");
};