From 7e32bb20983f09db31909aa907cbefcaabdaab0d Mon Sep 17 00:00:00 2001
From: tomascz <nestorovic@seznam.cz>
Date: Sun, 8 Dec 2024 11:30:34 +0100
Subject: [PATCH] [#80] Support for HxC Floppy Emulator *.HFE images (Part 13:
 Must place fuzzy bits in fuzzy positions to reproduce them on a real disk)

---
 Main/src/HFE.cpp | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/Main/src/HFE.cpp b/Main/src/HFE.cpp
index fa2b3cb..926bad6 100644
--- a/Main/src/HFE.cpp
+++ b/Main/src/HFE.cpp
@@ -335,8 +335,8 @@ formatError: ::SetLastError(ERROR_BAD_FORMAT);
 			CTrackReaderWriter trw( bytes.GetCount()*CHAR_BIT, params.fluxDecoder, params.resetFluxDecoderOnIndex );
 			PCBYTE p=bytes,const pLast=bytes.end();
 			TLogTime tCell=GetCellTime( header.dataBitRate*1000 );
-			TLogTime tCurr=0;
-			for( BYTE nFollowingDataBitsToSkip=0; p<pLast; )
+			TLogTime tCurr=0;
+			for( BYTE nFollowingDataBitsToSkip=0,fuzzyQuot=100; p<pLast; )
 				switch (BYTE b=*p++){
 					case TOpCode::SETINDEX:
 						trw.AddIndexTime( tCurr );
@@ -354,6 +354,7 @@ formatError: ::SetLastError(ERROR_BAD_FORMAT);
 						break;
 					case TOpCode::RANDOM:
 						b=::rand()&0x54; // constant adopted from HxC2001 emulator
+						fuzzyQuot=146; // let fluxes be at the very edge of neighboring cells
 						//fallthrough ('b' is now smaller than 'TOpCode::NOP')
 					default:
 						if (b>=TOpCode::NOP){ // invalid OpCode ?
@@ -361,19 +362,19 @@ formatError: ::SetLastError(ERROR_BAD_FORMAT);
 							break; // skip it
 						}
 						const BYTE nBits=CHAR_BIT-nFollowingDataBitsToSkip;
-						const TLogTime tSpan=nBits*tCell;
+						const TLogTime tSpan=nBits*tCell, tFuzzy=tCell*fuzzyQuot/100;
 						for( BYTE data=b<<nFollowingDataBitsToSkip,i=0; data; data<<=1,i++ )
 							if ((char)data<0)
-								trw.AddTime( tCurr + i*tCell );
+								trw.AddTime( tCurr + i*tCell+tFuzzy );
 						tCurr+=tSpan;
-						nFollowingDataBitsToSkip=0;
+						nFollowingDataBitsToSkip=0, fuzzyQuot=100;
 						break;
 				}
 			if (trw.GetIndexCount()<1)
 				trw.AddIndexTime(0);
 			if (trw.GetIndexCount()<2)
 				trw.AddIndexTime(tCurr);
-			return CInternalTrack::CreateFrom( *this, trw, floppyType );
+			return CInternalTrack::CreateFrom( *this, trw, floppyType );
 		}else{
 			CapsTrackInfoT2 cti={};
 				cti.trackbuf=bytes;