Interfacing D to C R standalone math library

[Mike Parker]

On 5/31/2012 9:51 PM, Mike Parker wrote:
> On 5/31/2012 9:40 PM, TJB wrote:
>> One more question, if I may. I noticed that I forgot to include the
>> set_seed function. The call to rnorm works the way I have called it, but
>> it must be using some default seed (its a random number generator).
>>
>> I have tried including the set_seed function as follows:
>>
>> import std.stdio;
>>
>> extern (C) void set_seed(unsigned int, unsigned int);
>> extern (C) double rnorm(double, double);
>>
>> void main() {
>> set_seed(0,77991);
>> foreach(i; 0 .. 100) {
>> writeln(myfunc(0.0, 1.0));
>> }
>> }
>>
>> double myfunc(double a, double b) {
>> return rnorm(a, b);
>> }
>>
>> I compile this the same way as you suggest, but now the compiler is
>> squealing at me with the following message:
>>
>> $ dmd rnorm.d -L-L/usr/lob -L-lRmath -L-lm
>> rnorm.d(6): found 'int' when expecting ')'
>> rnorm.d(6): semicolon expected following function declaration
>> rnorm.d(6): Declaration expected, not ','
>>
>> When I grep set_seed in Rmath.h I get:
>>
>> $ grep set_seed Rmath.h
>> void set_seed(unsigned int, unsigned int);
>>
>> So I think I have called it correctly. Any thoughts or suggestions?
>>
>> Thanks, you have been so helpful!
>>
>> TJB
>>
>>
>
> D doesn't know anything about C's 'unsigned int'. You need to convert
> parameters to the equivalent in D, which would be uint.
>
> extern (C) void set_seed(unsigned int, unsigned int);
>
> See the following page for more info on interfacing with C:
>
> http://dlang.org/interfaceToC.html

Sorry, I meant:

  extern (C) void set_seed(uint, uint);