FPC 3.2.2 - C stdin, stdout and stderr could not be imported.

[paule32]

i have the following code:

Code: Pascal  [Select][+][-]

1. var
2.     __stdin : Pointer; cdecl; external 'msvcrt.dll' name 'stdin' ;

and I get the following error message:

Code: Text  [Select][+][-]

1. Fatal: Syntax error, ":" expected but ";" found

[Thaddy]

You wrote the code the other way around and more specific stdin already exists in freepascal as an alias for input.

try this:

Code: Pascal  [Select][+][-]

1. var
2.     mystdin : Pointer; external 'msvcrt.dll' name '__stdin' ;

And stdin is a textfile, and in C a handle, not a pointer, even my code won't work but puts you on the right track.
Pointers also do not need a calling convention. Also mind trailing spaces...
Btw, why would you need stdin from msvcrt? that does not make any sense at all. It is in system and part of any pascal program.
(btw, I can detect the use of AI, I smell it..., tell me I am wrong)

[MarkMLl]

You wrote the code the other way around and more specific stdin already exists in freepascal as an alias for input.

There are two separate things here: System.StdIn as a documented alias for Input (i.e. semi-magical as a program parameter), and the well-known handles stdin etc. which have special meaning in the context of many OSes.

I would presume that in the case of msvcrt it's a (function returning a?) numeric constant, but this is somewhere where one has to be very cautious.

MarkMLl

[paule32]

Hi Thaddy,

yes, you right - from msvcrt.dll
I use some C-Functions in an Application that need the **stdin** for **fgets** and others.

Edit:

@MarkMLI 
under Windows, you are faced with STD_INPUT_HANDLE from the win32API and the C-Functions like fgets or fopen - which comes from historically reason.
Because Microsoft does write the OS with C (I guess).

And as such, you have two Versions for low-level C-Function's, and the high-level API functions.
Last but not least: the calling convention's stdcall (Pascal), and cdecl for C/C++.

[Thaddy]

fgets and family work happily with fpc's stdin.