[fpc-pascal] Pointer to a const char

[Antonio Fortuny]

Le 04/11/2013 14:18, Alexander a écrit :
> How can I describe a "pointer to a constant char" in FreePascal?
>
> For example this C function:
>
> int some_func(const char *arg, ...);
... coulb be translated to

some_proc(const arg: PChar, ...);

where the argument cannot be changed in any way (the compiler complains) but the data to which the argument points can be freely changed, thus:
(arg + offset)^ := #0;		works
I don't know a way to make the data pointed to, as being constant.
Have a look athttp://www.freepascal.org/docs-html/ref/refsu61.html#x160-17000014.4.4

Antonio.


>
>
> My guess in FreePascal is this(with ctypes unit):
>
> function some_func(const arg: pcchar): cint; cdecl; external;
>
> A constant argument to a function.
> I'm not sure, is it a "constant pointer to a char", or a "pointer to a constant char".
The first one applies.
>
> -- 
> Alex
>
>
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