Ah, if you mean that SIGDN is defined as a DWord in its C headers but as
a LongInt in FPC, then I think it's due to backwards compatibility back
when Turbo Pascal and Delphi didn't have an unsigned 32-bit integer type
(LongWord), and so such a hexadecimal constant would default to LongInt.
Gareth aka. Kit
On 24/06/2026 23:51, Mattias Gaertner via fpc-devel wrote:
On 6/24/26 22:54, J. Gareth "Kit" Moreton via fpc-devel wrote:
Hmmm, that's a little bit difficult. What happens if you define the
constants as, say, "SIGDN_FILESYSPATH = longint($80058000);"?
Then it would compile.
But it seems the C code uses DWord, so why should FPC use longint?
Mattias
Gareth aka. Kit
On 24/06/2026 21:44, Mattias Gaertner via fpc-devel wrote:
On 6/24/26 22:35, J. Gareth "Kit" Moreton via fpc-devel wrote:
I think it's deliberately designed that way so such codes are
negative numbers in signed 32-bit.
I spotted it because code fails to compile with a range check error.
Windows docs says these constants are from an enumeration.
Mattias
Gareth aka. Kit
On 24/06/2026 20:51, Mattias Gaertner via fpc-devel wrote:
Hi,
Unit shlobj has:
SIGDN = longint;
But the constants are for example:
SIGDN_FILESYSPATH = $80058000;
Maybe SIGDN must be DWord?
Mattias
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