/*
 * This module holds the implementation of special vararg templates for D style var args.
 *
 * Provides the functions tango.core.Vararg expects to be present!
 */

module llvmdc.Vararg;

// Check for the right compiler
version(LLVMDC)
{
    // OK
}
else
{
    static assert(false, "This module is only valid for LLVMDC");
}

alias void* va_list;

void va_start(T) ( out va_list ap, inout T parmn )
{
    // not needed !
}

T va_arg(T)(ref va_list vp)
{
    T* arg = cast(T*) vp;
    // llvmdc always aligns to size_t.sizeof in vararg lists
    vp = cast(va_list) ( cast(void*) vp + ( ( T.sizeof + size_t.sizeof - 1 ) & ~( size_t.sizeof - 1 ) ) );
    return *arg;
}

void va_end( va_list ap )
{
    // not needed !
}

void va_copy( out va_list dst, va_list src )
{
    // seems pretty useless !
    dst = src;
}