char ***argc problems.

[1100110]

(sorry for spam...)

On Sunday, 12 August 2012 at 21:04:55 UTC, 1100110 wrote:
> Would this be useful?
> https://github.com/1100110/OpenMPI
>
> On Sunday, 12 August 2012 at 20:52:03 UTC, Simen Kjaeraas wrote:
>> On Sun, 12 Aug 2012 22:30:57 +0200, Andrew 
>> <andrew.spott at gmail.com> wrote:
>>
>>> I'm attempting to create a wrapper for MPI, however, MPI_Init
>>> wants to read the arguments for main():
>>>
>>> MPI_Init(int *argv, char ***argc);
>>>
>>> How do I get this last level of pointer reference?
>>>
>>> So far, I have:
>>>
>>> void main (string[] args)
>>> {
>>>     auto argarr = new char*[args.length];
>>>     foreach(i, a; args)
>>>         argarr[i] = (a.dup ~ '\0').ptr;
>>>
>>>     int argc = to!(int)(argarr.length);
>>>     MPI_Init(&argc, argarr.ptr);
>>> }
>>>
>>> Any ideas?
>>
>>
>>    // Array of pointers to command line parameters.
>>    char*[] argv = args.map!((a)=>(a.dup~'\0').ptr).array;
>>    // Address of first element of that array.
>>    char** argvp = &argv[0];
>>    // And finally, address of the pointer to that first 
>> element.
>>    char*** argvpp = &argvp;
>>
>> Now, the interesting part is reconstructing the string[] from
>> the potentially modified argvpp...