public LIDATARecord(RecordReader reader, RecordContext context)
: base(reader, context)
{
this.SegmentIndex = reader.ReadIndex();
if (SegmentIndex == 0 || SegmentIndex > context.Segments.Count)
{
throw new InvalidDataException("SegmentIndex is out of range.");
}
this.DataOffset = reader.ReadUInt16Or32();
this.Data = reader.ReadToEnd();
// TODO: parse LIDATA (recursive; a bit messy)
}
public PUBDEFRecord(RecordReader reader, RecordContext context)
: base(reader, context)
{
int baseGroupIndex = reader.ReadIndex();
if (baseGroupIndex > context.Groups.Count)
{
throw new InvalidDataException("GroupIndex is out of range.");
}
if (baseGroupIndex > 0)
{
this.BaseGroup = context.Groups[baseGroupIndex - 1];
}
int baseSegmentIndex = reader.ReadIndex();
if (baseSegmentIndex > context.Segments.Count)
{
throw new InvalidDataException("SegmentIndex is out of range.");
}
if (baseSegmentIndex == 0)
{
this.BaseFrame = reader.ReadUInt16();
}
else
{
this.BaseSegment = context.Segments[baseSegmentIndex - 1];
}
int startIndex = context.PublicNames.Count;
while (!reader.IsEOF)
{
PublicNameDefinition def = new PublicNameDefinition();
def.DefinedBy = reader.RecordNumber;
def.BaseGroup = BaseGroup;
def.BaseSegment = BaseSegment;
def.BaseFrame = BaseFrame;
def.Name = reader.ReadPrefixedString();
def.Offset = (int)reader.ReadUInt16Or32();
def.TypeIndex = reader.ReadIndex();
context.PublicNames.Add(def);
}
int endIndex = context.PublicNames.Count;
this.Definitions = context.PublicNames.Slice(
startIndex, endIndex - startIndex);
}
public SEGDEFRecord(RecordReader reader, RecordContext context)
: base(reader, context)
{
SegmentDefinition def = new SegmentDefinition();
// Read the record.
byte acbp = reader.ReadByte();
def.Alignment = GetAlignment(acbp);
def.Combination = GetCombination(acbp);
def.IsUse32 = GetUse32(acbp);
if (def.Alignment == SegmentAlignment.Absolute)
{
def.Frame = reader.ReadUInt16();
def.Offset = reader.ReadByte();
}
UInt32 storedLength=reader.ReadUInt16Or32();
def.Length = GetLength(acbp, storedLength, reader.RecordNumber);
UInt16 segmentNameIndex = reader.ReadIndex();
if (segmentNameIndex > context.Names.Count)
throw new InvalidDataException("SegmentNameIndex is out of range.");
if (segmentNameIndex > 0)
def.SegmentName = context.Names[segmentNameIndex - 1];
UInt16 classNameIndex = reader.ReadIndex();
if (classNameIndex > context.Names.Count)
throw new InvalidDataException("ClassNameIndex is out of range.");
if (classNameIndex > 0)
def.ClassName = context.Names[classNameIndex - 1];
UInt16 overlayNameIndex = reader.ReadIndex();
if (overlayNameIndex > context.Names.Count)
throw new InvalidDataException("OverlayNameIndex is out of range.");
if (overlayNameIndex > 0)
def.OverlayName = context.Names[overlayNameIndex - 1];
def.Data = new byte[def.Length];
//def.Fixups = new List<FixupDefinition>();
this.Definition = def;
context.Segments.Add(def);
}
public LEDATARecord(RecordReader reader, RecordContext context)
: base(reader, context)
{
UInt16 segmentIndex = reader.ReadIndex();
if (segmentIndex == 0 || segmentIndex > context.Segments.Count)
{
throw new InvalidDataException("SegmentIndex is out of range.");
}
this.Segment = context.Segments[segmentIndex - 1];
this.DataOffset = reader.ReadUInt16Or32();
this.Data = reader.ReadToEnd(); // TBD: this can be optimized to
// reduce extra data copy
// Fill the segment's data.
if (Data.Length + DataOffset > Segment.Length)
{
throw new InvalidDataException("The LEDATA overflows the segment.");
}
Array.Copy(Data, 0, Segment.Data, DataOffset, Data.Length);
}
private FixupDefinition ParseFixupSubrecord(RecordReader reader, RecordContext context)
{
FixupDefinition fixup = new FixupDefinition();
byte b1 = reader.ReadByte();
byte b2 = reader.ReadByte();
UInt16 w = (UInt16)((b1 << 8) | b2); // big endian
fixup.Mode = (w & 0x4000) != 0 ? FixupMode.SegmentRelative : FixupMode.SelfRelative;
fixup.Location = (FixupLocation)((w >> 10) & 0x0F);
fixup.DataOffset = (UInt16)(w & 0x03FF);
byte b = reader.ReadByte();
bool useFrameThread = (b & 0x80) != 0;
if (useFrameThread)
{
int frameNumber = (b >> 4) & 0x3;
FixupThreadDefinition thread = context.FrameThreads[frameNumber];
if (!thread.IsDefined)
throw new InvalidDataException("Frame thread " + frameNumber + " is not defined.");
FixupFrame spec = new FixupFrame();
spec.Method = (FixupFrameMethod)thread.Method;
spec.IndexOrFrame = thread.IndexOrFrame;
fixup.Frame = spec;
}
else
{
FixupFrame spec = new FixupFrame();
spec.Method = (FixupFrameMethod)((b >> 4) & 7);
if ((int)spec.Method <= 3)
{
spec.IndexOrFrame = reader.ReadIndex();
}
fixup.Frame = spec;
}
bool useTargetThread = (b & 0x08) != 0;
if (useTargetThread)
{
bool hasTargetDisplacement = (b & 0x04) != 0;
int targetNumber = b & 3;
FixupThreadDefinition thread = context.TargetThreads[targetNumber];
if (!thread.IsDefined)
throw new InvalidDataException("Target thread " + targetNumber + " is not defined.");
FixupTargetMethod method = (FixupTargetMethod)((int)thread.Method & 3);
if (hasTargetDisplacement)
method |= (FixupTargetMethod)4;
FixupTarget spec = new FixupTarget();
spec.Referent = ResolveFixupReferent(context, method, thread.IndexOrFrame);
if ((int)method <= 3)
{
spec.Displacement = reader.ReadUInt16Or32();
}
fixup.Target = spec;
}
else
{
FixupTargetMethod method = (FixupTargetMethod)(b & 7);
UInt16 indexOrFrame = reader.ReadIndex();
FixupTarget spec = new FixupTarget();
spec.Referent = ResolveFixupReferent(context, method, indexOrFrame);
if ((int)method <= 3)
{
spec.Displacement = reader.ReadUInt16Or32();
}
fixup.Target = spec;
}
return fixup;
}
public SEGDEFRecord(RecordReader reader, RecordContext context)
: base(reader, context)
{
SegmentDefinition def = new SegmentDefinition();
// Read the record.
byte acbp = reader.ReadByte();
def.Alignment = GetAlignment(acbp);
def.Combination = GetCombination(acbp);
def.IsUse32 = GetUse32(acbp);
if (def.Alignment == SegmentAlignment.Absolute)
{
def.Frame = reader.ReadUInt16();
def.Offset = reader.ReadByte();
}
UInt32 storedLength = reader.ReadUInt16Or32();
def.Length = GetLength(acbp, storedLength, reader.RecordNumber);
UInt16 segmentNameIndex = reader.ReadIndex();
if (segmentNameIndex > context.Names.Count)
{
throw new InvalidDataException("SegmentNameIndex is out of range.");
}
if (segmentNameIndex > 0)
{
def.SegmentName = context.Names[segmentNameIndex - 1];
}
UInt16 classNameIndex = reader.ReadIndex();
if (classNameIndex > context.Names.Count)
{
throw new InvalidDataException("ClassNameIndex is out of range.");
}
if (classNameIndex > 0)
{
def.ClassName = context.Names[classNameIndex - 1];
}
UInt16 overlayNameIndex = reader.ReadIndex();
if (overlayNameIndex > context.Names.Count)
{
throw new InvalidDataException("OverlayNameIndex is out of range.");
}
if (overlayNameIndex > 0)
{
def.OverlayName = context.Names[overlayNameIndex - 1];
}
def.Data = new byte[def.Length];
//def.Fixups = new List<FixupDefinition>();
this.Definition = def;
context.Segments.Add(def);
}
public PUBDEFRecord(RecordReader reader, RecordContext context)
: base(reader, context)
{
int baseGroupIndex = reader.ReadIndex();
if (baseGroupIndex > context.Groups.Count)
throw new InvalidDataException("GroupIndex is out of range.");
if (baseGroupIndex > 0)
this.BaseGroup = context.Groups[baseGroupIndex - 1];
int baseSegmentIndex = reader.ReadIndex();
if (baseSegmentIndex > context.Segments.Count)
throw new InvalidDataException("SegmentIndex is out of range.");
if (baseSegmentIndex == 0)
this.BaseFrame = reader.ReadUInt16();
else
this.BaseSegment = context.Segments[baseSegmentIndex - 1];
int startIndex = context.PublicNames.Count;
while (!reader.IsEOF)
{
PublicNameDefinition def = new PublicNameDefinition();
def.DefinedBy = reader.RecordNumber;
def.BaseGroup = BaseGroup;
def.BaseSegment = BaseSegment;
def.BaseFrame = BaseFrame;
def.Name = reader.ReadPrefixedString();
def.Offset = (int)reader.ReadUInt16Or32();
def.TypeIndex = reader.ReadIndex();
context.PublicNames.Add(def);
}
int endIndex = context.PublicNames.Count;
this.Definitions = context.PublicNames.Slice(
startIndex, endIndex - startIndex);
}
public LIDATARecord(RecordReader reader, RecordContext context)
: base(reader, context)
{
this.SegmentIndex = reader.ReadIndex();
if (SegmentIndex == 0 || SegmentIndex > context.Segments.Count)
throw new InvalidDataException("SegmentIndex is out of range.");
this.DataOffset = reader.ReadUInt16Or32();
this.Data = reader.ReadToEnd();
// TODO: parse LIDATA (recursive; a bit messy)
}
public LEDATARecord(RecordReader reader, RecordContext context)
: base(reader, context)
{
UInt16 segmentIndex = reader.ReadIndex();
if (segmentIndex == 0 || segmentIndex > context.Segments.Count)
{
throw new InvalidDataException("SegmentIndex is out of range.");
}
this.Segment = context.Segments[segmentIndex - 1];
this.DataOffset = reader.ReadUInt16Or32();
this.Data = reader.ReadToEnd(); // TBD: this can be optimized to
// reduce extra data copy
// Fill the segment's data.
if (Data.Length + DataOffset > Segment.Length)
throw new InvalidDataException("The LEDATA overflows the segment.");
Array.Copy(Data, 0, Segment.Data, DataOffset, Data.Length);
}
private FixupDefinition ParseFixupSubrecord(RecordReader reader, RecordContext context)
{
FixupDefinition fixup = new FixupDefinition();
byte b1 = reader.ReadByte();
byte b2 = reader.ReadByte();
UInt16 w = (UInt16)((b1 << 8) | b2); // big endian
fixup.Mode = (w & 0x4000) != 0 ? FixupMode.SegmentRelative : FixupMode.SelfRelative;
fixup.Location = (FixupLocation)((w >> 10) & 0x0F);
fixup.DataOffset = (UInt16)(w & 0x03FF);
byte b = reader.ReadByte();
bool useFrameThread = (b & 0x80) != 0;
if (useFrameThread)
{
int frameNumber = (b >> 4) & 0x3;
FixupThreadDefinition thread = context.FrameThreads[frameNumber];
if (!thread.IsDefined)
{
throw new InvalidDataException("Frame thread " + frameNumber + " is not defined.");
}
FixupFrame spec = new FixupFrame();
spec.Method = (FixupFrameMethod)thread.Method;
spec.IndexOrFrame = thread.IndexOrFrame;
fixup.Frame = spec;
}
else
{
FixupFrame spec = new FixupFrame();
spec.Method = (FixupFrameMethod)((b >> 4) & 7);
if ((int)spec.Method <= 3)
{
spec.IndexOrFrame = reader.ReadIndex();
}
fixup.Frame = spec;
}
bool useTargetThread = (b & 0x08) != 0;
if (useTargetThread)
{
bool hasTargetDisplacement = (b & 0x04) != 0;
int targetNumber = b & 3;
FixupThreadDefinition thread = context.TargetThreads[targetNumber];
if (!thread.IsDefined)
{
throw new InvalidDataException("Target thread " + targetNumber + " is not defined.");
}
FixupTargetMethod method = (FixupTargetMethod)((int)thread.Method & 3);
if (hasTargetDisplacement)
{
method |= (FixupTargetMethod)4;
}
FixupTarget spec = new FixupTarget();
spec.Referent = ResolveFixupReferent(context, method, thread.IndexOrFrame);
if ((int)method <= 3)
{
spec.Displacement = reader.ReadUInt16Or32();
}
fixup.Target = spec;
}
else
{
FixupTargetMethod method = (FixupTargetMethod)(b & 7);
UInt16 indexOrFrame = reader.ReadIndex();
FixupTarget spec = new FixupTarget();
spec.Referent = ResolveFixupReferent(context, method, indexOrFrame);
if ((int)method <= 3)
{
spec.Displacement = reader.ReadUInt16Or32();
}
fixup.Target = spec;
}
return(fixup);
}
