// Copyright 2022 Dietrich Epp.
// This file is part of SyncFiles. SyncFiles is licensed under the terms of the
// Mozilla Public License, version 2.0. See LICENSE.txt for details.
#include "convert/convert.h"

struct ConvertEngine {
	ConvertBuildf build;
	ConvertRunf run;
};

const struct ConvertEngine kEngines[][2] = {
	{{Convert1fBuild, Convert1fRun}, {Convert1rBuild, Convert1rRun}}};

int ConverterBuild(struct Converter *c, Handle data, Size datasz,
                   ConvertDirection direction)
{
	int engine;
	const struct ConvertEngine *funcs;
	Handle out;
	ErrorCode err;

	if (datasz == 0) {
		return kErrorBadData;
	}
	engine = (UInt8)(**data) - 1;
	if (engine < 0 || (int)(sizeof(kEngines) / sizeof(*kEngines)) <= engine) {
		// Invalid engine.
		return kErrorBadData;
	}
	funcs = &kEngines[engine][direction];
	if (funcs->build == NULL || funcs->run == NULL) {
		// Invalid engine.
		return kErrorBadData;
	}
	err = funcs->build(&out, data, datasz);
	if (err != 0) {
		return err;
	}
	c->data = out;
	c->run = funcs->run;
	return 0;
}