Biggest problems w/ D

[Radu]

is this working for you?

extern(Windows) void GetName(ref char* name)
{
    name = "just modified".ptr;
}

void main ()
{
    char* cpt = "initial value".ptr;
    GetName(cpt);
    printf("%s",cpt);
}

Gilles G. wrote:
> Kirk McDonald Wrote:
>
>   
>> C. Dunn wrote:
>>     
>>> 4) Not enough help for converting between D strings and C char*. 
>>> There must be conversion functions which work regardless of whether
>>> the D string is dynamic or not, and regardless of whether the C char*
>>> is null terminated.  I'm not sure what the answer is, but this has
>>> lead to a large number of runtime bugs for me as a novice.
>>>
>>>       
>> The std.string module has the toStringz and toString functions.
>>
>> The toString function simply returns a slice over the C string:
>>
>> char[] toString(char* ptr) {
>> 	return ptr[0 .. strlen(ptr)];
>> }
>>
>> The toStringz function simply appends a null character (\0) to the end
>> of the D string:
>>
>> char* toStringz(char[] str) {
>> 	return (str ~ \0).ptr;
>> }
>>
>> These are very simple operations, and it is fairly easy to adapt
>> them to whatever needs you have.
>>     
> Well, maybe I could not find an obvious solution, but let's explain the problems I had with char[] and char*.
>
> I have a DLL defining the following (extern) function:
>       extern(Windows) void GetName(char* name)
> I would just like to put the name of the DLL in the variable name. What I would do in C is something like:
>      extern(Windows) void GetName(char* name)
>      {
>           name = "The DLL name";
>      }
> This just won't work in D... My solution for now is the following:
>      extern(Windows) void GetName(char* name)
>     {
>         foreach(ic, c; "The DLL name\0")
>              name[ic]=c;
>     }
> which is ugly, but do you have a better solution?
>
> --Gilles
>