// license:BSD-3-Clause
// copyright-holders:Olivier Galibert
#ifndef MAME_FORMATS_IPF_DSK_H
#define MAME_FORMATS_IPF_DSK_H

#pragma once

#include "flopimg.h"

#include <vector>

class ipf_format : public floppy_image_format_t
{
public:
	virtual int identify(util::random_read &io, uint32_t form_factor, const std::vector<uint32_t> &variants) override;
	virtual bool load(util::random_read &io, uint32_t form_factor, const std::vector<uint32_t> &variants, floppy_image *image) override;

	virtual const char *name() const override;
	virtual const char *description() const override;
	virtual const char *extensions() const override;
	virtual bool supports_save() const override;

private:
	struct ipf_decode {
		struct track_info {
			uint32_t cylinder = 0, head = 0, type = 0;
			uint32_t sigtype = 0, process = 0, reserved[3] = { 0, 0, 0 };
			uint32_t size_bytes = 0, size_cells = 0;
			uint32_t index_bytes = 0, index_cells = 0;
			uint32_t datasize_cells = 0, gapsize_cells = 0;
			uint32_t block_count = 0, weak_bits = 0;

			uint32_t data_size_bits = 0;

			bool info_set = false;

			const uint8_t *data = nullptr;
			uint32_t data_size = 0;
		};

		std::vector<track_info> tinfos;
		uint32_t tcount = 0;

		uint32_t type = 0, release = 0, revision = 0;
		uint32_t encoder_type = 0, encoder_revision = 0, origin = 0;
		uint32_t min_cylinder = 0, max_cylinder = 0, min_head = 0, max_head = 0;
		uint32_t credit_day = 0, credit_time = 0;
		uint32_t platform[4] = {}, extra[5] = {};

		uint32_t crc32r(const uint8_t *data, uint32_t size);

		bool parse_info(const uint8_t *info);
		bool parse_imge(const uint8_t *imge);
		bool parse_data(const uint8_t *data, uint32_t &pos, uint32_t max_extra_size);

		bool scan_one_tag(std::vector<uint8_t> &data, uint32_t &pos, uint8_t *&tag, uint32_t &tsize);
		bool scan_all_tags(std::vector<uint8_t> &data);
		static uint32_t r32(const uint8_t *p);
		static uint32_t rb(const uint8_t *&p, int count);

		track_info *get_index(uint32_t idx);

		void track_write_raw(std::vector<uint32_t>::iterator &tpos, const uint8_t *data, uint32_t cells, bool &context);
		void track_write_mfm(std::vector<uint32_t>::iterator &tpos, const uint8_t *data, uint32_t start_offset, uint32_t patlen, uint32_t cells, bool &context);
		void track_write_weak(std::vector<uint32_t>::iterator &tpos, uint32_t cells);
		bool generate_block_data(const uint8_t *data, const uint8_t *dlimit, std::vector<uint32_t>::iterator tpos, std::vector<uint32_t>::iterator tlimit, bool &context);

		bool gap_description_to_reserved_size(const uint8_t *&data, const uint8_t *dlimit, uint32_t &res_size);
		bool generate_gap_from_description(const uint8_t *&data, const uint8_t *dlimit, std::vector<uint32_t>::iterator tpos, uint32_t size, bool pre, bool &context);
		bool generate_block_gap_0(uint32_t gap_cells, uint8_t pattern, uint32_t &spos, uint32_t ipos, std::vector<uint32_t>::iterator &tpos, bool &context);
		bool generate_block_gap_1(uint32_t gap_cells, uint32_t &spos, uint32_t ipos, const uint8_t *data, const uint8_t *dlimit, std::vector<uint32_t>::iterator &tpos, bool &context);
		bool generate_block_gap_2(uint32_t gap_cells, uint32_t &spos, uint32_t ipos, const uint8_t *data, const uint8_t *dlimit, std::vector<uint32_t>::iterator &tpos, bool &context);
		bool generate_block_gap_3(uint32_t gap_cells, uint32_t &spos, uint32_t ipos, const uint8_t *data, const uint8_t *dlimit, std::vector<uint32_t>::iterator &tpos, bool &context);
		bool generate_block_gap(uint32_t gap_type, uint32_t gap_cells, uint8_t pattern, uint32_t &spos, uint32_t ipos, const uint8_t *data, const uint8_t *dlimit, std::vector<uint32_t>::iterator tpos, bool &context);

		bool generate_block(track_info *t, uint32_t idx, uint32_t ipos, std::vector<uint32_t> &track, uint32_t &pos, uint32_t &dpos, uint32_t &gpos, uint32_t &spos, bool &context);
		uint32_t block_compute_real_size(track_info *t);

		void timing_set(std::vector<uint32_t> &track, uint32_t start, uint32_t end, uint32_t time);
		bool generate_timings(track_info *t, std::vector<uint32_t> &track, const std::vector<uint32_t> &data_pos, const std::vector<uint32_t> &gap_pos);

		void rotate(std::vector<uint32_t> &track, uint32_t offset, uint32_t size);
		void mark_track_splice(std::vector<uint32_t> &track, uint32_t offset, uint32_t size);
		bool generate_track(track_info *t, floppy_image *image);
		bool generate_tracks(floppy_image *image);

		bool parse(std::vector<uint8_t> &data, floppy_image *image);
	};
};

extern const floppy_format_type FLOPPY_IPF_FORMAT;

#endif // MAME_FORMATS_IPF_DSK_H
