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G64.cc
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G64.cc
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///////////////////////////////////////////////////////////
//
// SuperDiskIndex
//
////////////////////
//
//
//
#include "Global.h"
#include "Helpers.h"
#include "Buffer.h"
#include "G64.h"
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
struct _g64_header
{
char sig[8];
u8 ver;
u8 tracks;
u16 max_track_size;
};
G64::G64()
{
MaxTrackSize=0;
}
G64::~G64()
{
for (int i=0; i<MAXTRACKS; i++) if (Tracks[i]) delete(Tracks[i]);
}
void G64::AddTrack(u16 track, class Buffer *rawbuffer)
{
if (track>=MAXTRACKS) return;
Tracks[track] = new Buffer(*rawbuffer);
MaxTrackSize = maxval(MaxTrackSize, rawbuffer->GetFill());
}
void G64::WriteG64File()
{
char *fn=NULL;
gen_output_filename(&fn, Config.fn_out, OT_DISKIMAGE, ".g64", OutputParams("raw", 0,0,0,0));
clog(1,"# Generating g64 diskimage '%s'.\n",fn);
int fd=open(fn, O_WRONLY|O_CREAT|O_TRUNC, DEFFILEMODE);
// file header
_g64_header header;
memcpy(header.sig, "GCR-1541", 8);
header.ver=0;
header.tracks=MAXTRACKS;
header.max_track_size=minval(MAXTRACKLEN,MaxTrackSize);
write(fd, &header, sizeof(header));
// track start offset table
u32 trackdataoffs = sizeof(header) + MAXTRACKS*4 + MAXTRACKS*4;
for (int i=0; i<MAXTRACKS; i++)
{
write(fd, &trackdataoffs, sizeof(trackdataoffs));
trackdataoffs+=minval(MAXTRACKLEN,MaxTrackSize)+2;
}
// speed zone table ( for now just hardcoded to 1541 defaults)
u32 speedzone = 0;
for (int i=0; i<MAXTRACKS; i++)
{
if (i<17*2) speedzone=3;
else if (i<24*2) speedzone=2;
else if (i<30*2) speedzone=1;
else speedzone=0;
write(fd, &speedzone, sizeof(speedzone));
}
for (int i=0; i<MAXTRACKS; i++)
{
u32 trackbyteswritten = 0;
if (Tracks[i])
{
u16 tracksize = minval(MAXTRACKLEN,Tracks[i]->GetFill())+2;
//printf("%d:%d\n",i,tracksize);
write(fd, &tracksize, sizeof(tracksize));
trackbyteswritten+=2;
write(fd, Tracks[i]->GetBuffer(), tracksize);
trackbyteswritten+=tracksize;
}
u8 zero=0;
for (u32 z=trackbyteswritten; z<minval(MAXTRACKLEN,MaxTrackSize)+2; z++) write(fd, &zero, 1);
}
close(fd);
}