/*
//
// Copyright (C) 2006-2025 Jean-François DEL NERO
//
// This file is part of the HxCFloppyEmulator library
//
// HxCFloppyEmulator may be used and distributed without restriction provided
// that this copyright statement is not removed from the file and that any
// derivative work contains the original copyright notice and the associated
// disclaimer.
//
// HxCFloppyEmulator is free software; you can redistribute it
// and/or modify  it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// HxCFloppyEmulator is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
//   See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with HxCFloppyEmulator; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
//
*/
///////////////////////////////////////////////////////////////////////////////////
//-------------------------------------------------------------------------------//
//-------------------------------------------------------------------------------//
//-----------H----H--X----X-----CCCCC----22222----0000-----0000------11----------//
//----------H----H----X-X-----C--------------2---0----0---0----0--1--1-----------//
//---------HHHHHH-----X------C----------22222---0----0---0----0-----1------------//
//--------H----H----X--X----C----------2-------0----0---0----0-----1-------------//
//-------H----H---X-----X---CCCCC-----222222----0000-----0000----1111------------//
//-------------------------------------------------------------------------------//
//----------------------------------------------------- http://hxc2001.free.fr --//
///////////////////////////////////////////////////////////////////////////////////
// File : micraln_loader.c
// Contains: R2E Micral N floppy image loader
//
// Written by: Jean-François DEL NERO
//
// Change History (most recent first):
///////////////////////////////////////////////////////////////////////////////////

#include <string.h>
#include <stdlib.h>
#include <stdio.h>

#include "types.h"

#include "internal_libhxcfe.h"
#include "tracks/track_generator.h"
#include "libhxcfe.h"

#include "floppy_loader.h"
#include "floppy_utils.h"

#include "micraln_loader.h"

#include "libhxcadaptor.h"

int MicralN_libIsValidDiskFile( HXCFE_IMGLDR * imgldr_ctx, HXCFE_IMGLDR_FILEINFOS * imgfile )
{
	return hxcfe_imgCheckFileCompatibility( imgldr_ctx, imgfile, "MicralN_libIsValidDiskFile", "mic", (64*32*1*128) );
}

int MicralN_libLoad_DiskFile(HXCFE_IMGLDR * imgldr_ctx,HXCFE_FLOPPY * floppydisk,char * imgfile,void * parameters)
{

	FILE * f;
	unsigned int filesize;
	int i,j,k,trk;
	unsigned int file_offset;
	unsigned char* trackdata;
	int gap3len,interleave;
	int rpm;
	int trackformat;
	int sectorsize;
	HXCFE_CYLINDER* currentcylinder;
	HXCFE_SECTCFG  sectorconfig[32];

	imgldr_ctx->hxcfe->hxc_printf(MSG_DEBUG,"MicralN_libLoad_DiskFile %s",imgfile);

	f = hxc_fopen(imgfile,"rb");
	if( f == NULL )
	{
		imgldr_ctx->hxcfe->hxc_printf(MSG_ERROR,"Cannot open %s !",imgfile);
		return HXCFE_ACCESSERROR;
	}

	filesize = hxc_fgetsize(f);

	sectorsize = 128;

	trackformat=MICRALN_HS_SD;

	if( !(filesize % (64*32*1*sectorsize) ) )
	{
		gap3len=30;
		interleave=1;
		floppydisk->floppySectorPerTrack = 32;
		floppydisk->floppyNumberOfTrack = 64;
		floppydisk->floppyNumberOfSide = filesize / ( floppydisk->floppySectorPerTrack * sectorsize * floppydisk->floppyNumberOfTrack);

		floppydisk->floppyBitRate = 500000;
		floppydisk->floppyiftype = GENERIC_SHUGART_DD_FLOPPYMODE;
		floppydisk->tracks = (HXCFE_CYLINDER**)malloc(sizeof(HXCFE_CYLINDER*)*floppydisk->floppyNumberOfTrack);
		if( !floppydisk->tracks )
		{
			hxc_fclose(f);
			return HXCFE_INTERNALERROR;
		}

		memset(floppydisk->tracks,0,sizeof(HXCFE_CYLINDER*)*floppydisk->floppyNumberOfTrack);

		rpm=300; // normal rpm

		imgldr_ctx->hxcfe->hxc_printf(MSG_INFO_1,"filesize:%dkB, %d tracks, %d side(s), %d sectors/track, gap3:%d, interleave:%d,rpm:%d",filesize/1024,floppydisk->floppyNumberOfTrack,floppydisk->floppyNumberOfSide,floppydisk->floppySectorPerTrack,gap3len,interleave,rpm);

		trackdata = (unsigned char*)malloc(floppydisk->floppySectorPerTrack*sectorsize);
		if(!trackdata)
		{
			hxcfe_freeFloppy(imgldr_ctx->hxcfe, floppydisk );
			hxc_fclose(f);
			return HXCFE_INTERNALERROR;
		}

		trk = 0;
		for(i=0;i<floppydisk->floppyNumberOfSide;i++)
		{
			for(j=0;j<floppydisk->floppyNumberOfTrack;j++)
			{
				if( !floppydisk->tracks[j] )
				{
					floppydisk->tracks[j]=allocCylinderEntry(rpm,floppydisk->floppyNumberOfSide);
				}

				currentcylinder=floppydisk->tracks[j];

				hxcfe_imgCallProgressCallback(imgldr_ctx,trk,floppydisk->floppyNumberOfTrack*2 );
				trk++;

				memset(sectorconfig,0,sizeof(HXCFE_SECTCFG)*floppydisk->floppySectorPerTrack);
				for(k=0;k<floppydisk->floppySectorPerTrack;k++)
				{
					sectorconfig[k].head = i;
					sectorconfig[k].cylinder = j;
					sectorconfig[k].sector = k;
					sectorconfig[k].sectorsize = sectorsize;
					sectorconfig[k].bitrate = floppydisk->floppyBitRate;
					sectorconfig[k].gap3 = gap3len;
					sectorconfig[k].trackencoding = trackformat;
					sectorconfig[k].input_data = &trackdata[k*sectorsize];
				}

				file_offset = ( ( floppydisk->floppySectorPerTrack * sectorsize ) * j * floppydisk->floppyNumberOfSide) + \
								( ( floppydisk->floppySectorPerTrack * sectorsize ) * j * i);

				fseek (f , file_offset , SEEK_SET);

				hxc_fread(trackdata,(floppydisk->floppySectorPerTrack*sectorsize),f);

				currentcylinder->sides[i]=tg_generateTrackEx(floppydisk->floppySectorPerTrack,sectorconfig,1,0,floppydisk->floppyBitRate,rpm,trackformat,0,0,0);
			}
		}

		free(trackdata);

		imgldr_ctx->hxcfe->hxc_printf(MSG_INFO_1,"track file successfully loaded and encoded!");
		hxc_fclose(f);

		return HXCFE_NOERROR;
	}

	imgldr_ctx->hxcfe->hxc_printf(MSG_ERROR,"file size=%d !?",filesize);
	hxc_fclose(f);

	return HXCFE_BADFILE;
}

int MicralN_libGetPluginInfo(HXCFE_IMGLDR * imgldr_ctx,uint32_t infotype,void * returnvalue)
{
	static const char plug_id[]="MICRAL_N";
	static const char plug_desc[]="Micral N Loader";
	static const char plug_ext[]="mic";

	plugins_ptr plug_funcs=
	{
		(ISVALIDDISKFILE)   MicralN_libIsValidDiskFile,
		(LOADDISKFILE)      MicralN_libLoad_DiskFile,
		(WRITEDISKFILE)     0,
		(GETPLUGININFOS)    MicralN_libGetPluginInfo
	};

	return libGetPluginInfo(
			imgldr_ctx,
			infotype,
			returnvalue,
			plug_id,
			plug_desc,
			&plug_funcs,
			plug_ext
			);
}
