public override Program Load(Address addrLoad)
{
var cfgSvc = Services.RequireService <IConfigurationService>();
var rdr = new Core.Memory.BeImageReader(RawImage);
var hdr = rdr.ReadStruct <Header>();
var things = new Entry[hdr.cEntries];
for (int i = 0; i < things.Length; ++i)
{
things[i] = rdr.ReadStruct <Entry>();
Debug.Print("Type: {0,-16} Offset: {1:X8} Length: {2:X8}", things[i].type, things[i].offset, things[i].length);
}
var resourceEntry = things.FirstOrDefault(t => t.type == EntryType.ResourceFork);
if (resourceEntry.type == EntryType.ResourceFork)
{
var bytes = new byte[resourceEntry.length];
Array.Copy(RawImage, resourceEntry.offset, bytes, 0, bytes.Length);
var arch = cfgSvc.GetArchitecture("m68k");
var platform = (MacOSClassic)cfgSvc.GetEnvironment("macOs").Load(Services, arch);
this.rsrcFork = new ResourceFork(platform, bytes);
this.mem = new ByteMemoryArea(addrLoad, bytes);
this.segmentMap = new SegmentMap(addrLoad);
return(new Program(this.segmentMap, arch, platform));
}
else
{
throw new BadImageFormatException("Unable to find a resource fork.");
}
}
public AppleDoubleLoader(IServiceProvider services, string filename, byte[] rawImage)
: base(services, filename, rawImage)
{
rsrcFork = null !;
mem = null !;
segmentMap = null !;
}
public AppleDoubleLoader(IServiceProvider services, ImageLocation imageUri, byte[] rawImage)
: base(services, imageUri, rawImage)
{
rsrcFork = null !;
mem = null !;
segmentMap = null !;
}
public void Relocate()
{
var memA5 = (ByteMemoryArea)platform.A5World.MemoryArea;
var a5belowWriter = new BeImageWriter(memA5, 0);
var a5belowReader = new BeImageReader(memA5, 0);
uint a5globalOffset = platform.A5Offset - a5dbelow;
var a5WorldAddress = (UInt32)((platform.A5World.Address.Offset + platform.A5Offset) & 0xFFFFFFFF);
// set Repeat count = 1, reset after each completed copy cycle
// byte token lower 4 bits number of words to copy from compressed data
// byte token upper 4 bits number of words to skip in global application data space
// if either value is 0 then get run length value which is in bytes.
// if the new run length value for copy is 0 then it's the end of compression data.
for (;;)
{
int a5repeat = 1;
// Skip is number of 16-bit words to skip
uint a5globalSkip = a5dr.ReadByte();
if (a5globalSkip == 0)
{
a5globalSkip = a5dr.ReadByte();
if (a5globalSkip == 0)
{
break;
}
if (a5globalSkip > 0x7F)
{
a5globalSkip = ((a5globalSkip & 0x7F) << 8) + a5dr.ReadByte();
a5globalSkip = (a5globalSkip << 16) + a5dr.ReadBeUInt16();
}
else
{
a5repeat = ResourceFork.GetRunLengthValue(a5dr, ref a5repeat);
//$BUG: a5repeat could return the value 0. The do-while below will
// decrement a5repeat before testing. This will lead to an effective
// repeat count of 2^32; likely not wanted.
}
}
else
{
if ((a5globalSkip & 0x80) == 0x80)
{
a5globalSkip = ((a5globalSkip & 0x7F) << 8) + a5dr.ReadByte();
}
}
a5globalSkip = a5globalSkip * 2;
do
{
a5globalOffset += a5globalSkip;
a5belowReader.Seek(a5globalOffset, SeekOrigin.Begin);
uint a5ptrOffset = a5belowReader.ReadBeUInt32();
a5belowWriter.Position = (int)a5globalOffset;
// write relocated A5World pointers to absolute address in A5World segment
// Possible register/mark as Global pointer references to strings
a5belowWriter.WriteBeUInt32((a5WorldAddress + a5ptrOffset) & 0xFFFFFFFF);
--a5repeat;
} while (a5repeat > 0);
}
}
