Is there some way to pass something like array to variadic function. I mean often there is no variant where function take valist instead of ... and when you need to wrap this function what do you do? Write many ifs?
I will illustrate my question with example

void someCfunction(int a,...)
{
	... do stuff here
}


void dmdscript_for_example_function(/*all_the_stuff*/,Value[] values)
{
	if(values.length==1) someCfunction(345,values[0].toString());
	else if(values.length==2) someCfunction(543,values[0].toString(),values[1].toString());
	//etc...
}

There must be a better way to do this...

In article <dmfcgr$2hpa$1@digitaldaemon.com>, bobef says...
>
>Is there some way to pass something like array to variadic function. I mean often there is no variant where function take valist instead of ... and when you need to wrap this function what do you do? Write many ifs? I will illustrate my question with example
>
>void someCfunction(int a,...)
>{
>	... do stuff here
>}
>
>
>void dmdscript_for_example_function(/*all_the_stuff*/,Value[] values)
>{
>	if(values.length==1) someCfunction(345,values[0].toString());
>	else if(values.length==2)
>someCfunction(543,values[0].toString(),values[1].toString());
>	//etc...
>}
>
>There must be a better way to do this...

I'm shooting from the hip here, but have you tried this?

void foobar(int a,void*[]...){ /* stuff */ }

- EricAnderton at yahoo

pragma wrote:
> In article <dmfcgr$2hpa$1@digitaldaemon.com>, bobef says...
> 
>>Is there some way to pass something like array to variadic function. I mean often there is no variant where function take valist instead of ... and when you need to wrap this function what do you do? Write many ifs?
>>I will illustrate my question with example
>>
>>void someCfunction(int a,...)
>>{
>>	... do stuff here
>>}
>>
>>
>>void dmdscript_for_example_function(/*all_the_stuff*/,Value[] values)
>>{
>>	if(values.length==1) someCfunction(345,values[0].toString());
>>	else if(values.length==2) someCfunction(543,values[0].toString(),values[1].toString());
>>	//etc...
>>}
>>
>>There must be a better way to do this...
> 
> 
> I'm shooting from the hip here, but have you tried this?
> 
> void foobar(int a,void*[]...){ /* stuff */ }
> 
> - EricAnderton at yahoo

I can't. I am not allowed to change any of the two functions. The one is defined by dmdscript and the other by the (guy_who_wrote_it !is me)

"bobef" <bobef@lessequal.com> wrote in message news:dmfcgr$2hpa$1@digitaldaemon.com...
> Is there some way to pass something like array to variadic function. I mean often there is no variant where function take valist instead of ... and when you need to wrap this function what do you do? Write many ifs? I will illustrate my question with example
>
> void someCfunction(int a,...)
> {
> ... do stuff here
> }
>
>
> void dmdscript_for_example_function(/*all_the_stuff*/,Value[] values)
> {
> if(values.length==1) someCfunction(345,values[0].toString());
> else if(values.length==2)
> someCfunction(543,values[0].toString(),values[1].toString());
> //etc...
> }
>
> There must be a better way to do this...

Redeclare someCfunction as:

void someCfunction(int[] a ...)

Walter Bright wrote:
> "bobef" <bobef@lessequal.com> wrote in message
> news:dmfcgr$2hpa$1@digitaldaemon.com...
> 
>>Is there some way to pass something like array to variadic function. I
>>mean often there is no variant where function take valist instead of ...
>>and when you need to wrap this function what do you do? Write many ifs?
>>I will illustrate my question with example
>>
>>void someCfunction(int a,...)
>>{
>>... do stuff here
>>}
>>
>>
>>void dmdscript_for_example_function(/*all_the_stuff*/,Value[] values)
>>{
>>if(values.length==1) someCfunction(345,values[0].toString());
>>else if(values.length==2)
>>someCfunction(543,values[0].toString(),values[1].toString());
>>//etc...
>>}
>>
>>There must be a better way to do this...
> 
> 
> Redeclare someCfunction as:
> 
> void someCfunction(int[] a ...)
> 

I think the problem is you can't allways redeclare a function.
What would be nice is to be able to construct arguments and pass them to another function.

For example to be able to (with ...) take n arguments, and pass to another variadic function some of them, for example a slice.

Walter Bright wrote:
> "bobef" <bobef@lessequal.com> wrote in message
> news:dmfcgr$2hpa$1@digitaldaemon.com...
> 
>>Is there some way to pass something like array to variadic function. I
>>mean often there is no variant where function take valist instead of ...
>>and when you need to wrap this function what do you do? Write many ifs?
>>I will illustrate my question with example
>>
>>void someCfunction(int a,...)
>>{
>>... do stuff here
>>}
>>
>>
>>void dmdscript_for_example_function(/*all_the_stuff*/,Value[] values)
>>{
>>if(values.length==1) someCfunction(345,values[0].toString());
>>else if(values.length==2)
>>someCfunction(543,values[0].toString(),values[1].toString());
>>//etc...
>>}
>>
>>There must be a better way to do this...
> 
> 
> Redeclare someCfunction as:
> 
> void someCfunction(int[] a ...)
> 
> 

extern(C) void someCfunction(int[] a...)
{
	printf("as %d %d\0",a);
}

int main(char[][] argv)
{
	int[] a;
	a~=5;a~=6;
	someCfunction(a);
	return 1;
}

outputs "as 2 9243472"

In article <dmpvro$2b3f$1@digitaldaemon.com>, bobef says...
>
>Walter Bright wrote:
>> "bobef" <bobef@lessequal.com> wrote in message news:dmfcgr$2hpa$1@digitaldaemon.com...
>> 
>>>Is there some way to pass something like array to variadic function. I mean often there is no variant where function take valist instead of ... and when you need to wrap this function what do you do? Write many ifs? I will illustrate my question with example
>>>
>>>void someCfunction(int a,...)
>>>{
>>>... do stuff here
>>>}
>>>
>>>
>>>void dmdscript_for_example_function(/*all_the_stuff*/,Value[] values)
>>>{
>>>if(values.length==1) someCfunction(345,values[0].toString());
>>>else if(values.length==2)
>>>someCfunction(543,values[0].toString(),values[1].toString());
>>>//etc...
>>>}
>>>
>>>There must be a better way to do this...
>> 
>> 
>> Redeclare someCfunction as:
>> 
>> void someCfunction(int[] a ...)
>> 
>> 
>
>extern(C) void someCfunction(int[] a...)
>{
>	printf("as %d %d\0",a);
>}
>
>int main(char[][] argv)
>{
>	int[] a;
>	a~=5;a~=6;
>	someCfunction(a);
>	return 1;
>}
>
>outputs "as 2 9243472"

Try this:

>extern(C) void someCfunction(int[] a...)
>{
>	writefln("as %s",a);
>}

- EricAnderton at yahoo

pragma wrote:
>>outputs "as 2 9243472"
> 
> 
> Try this:
> 
> 
>>extern(C) void someCfunction(int[] a...)
>>{
>>	writefln("as %s",a);
>>}
> 
> 
> - EricAnderton at yahoo

I got confused....... This is the real code I am asking the question for. There is no xchat_emit_writefln... And xchat_emit_print is what I meant with someCfunction...


//this is part of struct actually
extern(C) int (*xchat_emit_print) (xchat_plugin *ph,char *event_name, ...);

void* g_xchat_emit_print(Dobject pthis,CallContext* cc,Dobject othis,Value* ret,Value[] arglist)
{
	//todo: the whole arglist should be passed to the variadic function
	Value *v=getErrorReturn(arglist,1,"xchat_emit_print");
	if(!v)
	{
		if(arglist.length==1) this_ph.xchat_emit_print(this_ph,toStringz(arglist[0].toString()));
		else if(arglist.length==2) this_ph.xchat_emit_print(this_ph,toStringz(arglist[0].toString()),toStringz(arglist[1].toString()));
	//............
}