Vinzent Hoefler wrote:
Are enumeration types 1 or 4 bytes in Delphi? If they are one byte, it
looks quite different (and I'm not sure about all the types used here,
some seem to be sets, some enumerations). But at the first glance it
seems, they used both packed records to either ensure minimum size or
known record layout (maybe they even used the structure in some
assembly module?), and also aligned them manually to avoid unaligned
access issues.
Yes. VirtualTreeView/Delphi uses asm instructions
The size of sets are different from delphi to fpc making the record
structure different.
This is the record structure (size and offsets) in both compilers:
fpc:
Index Size: 4 Offset: 0
ChildCount Size: 4 Offset: 4
NodeHeight Size: 2 Offset: 8
States Size: 4 Offset: 10
Align Size: 1 Offset: 14
CheckState Size: 1 Offset: 15
CheckType Size: 1 Offset: 16
Dummy Size: 1 Offset: 17
Delphi:
Index Size: 4 Offset: 0
ChildCount Size: 4 Offset: 4
NodeHeight Size: 2 Offset: 8
States Size: 2 Offset: 10
Align Size: 1 Offset: 12
CheckState Size: 1 Offset: 13
CheckType Size: 1 Offset: 14
Dummy Size: 1 Offset: 15
Luiz
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