view lphobos/std/stdarg.d @ 971:985104c0f1db

Fix the problems exposed by the callingconv1.d test case. The first was that unless otherwise specified, inputs are assumed to be in registers even if they specify a "matching output" that's in memory. While testing that fix, I also ran into a bug causing the generated "matching output" for any input was always the first one instead of the correct one.
author Frits van Bommel <fvbommel wxs.nl>
date Tue, 17 Feb 2009 00:08:20 +0100
parents eef8ac26c66c
children
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/*
 * Placed in public domain.
 * Written by Hauke Duden and Walter Bright
 */

/* This is for use with variable argument lists with extern(D) linkage. */

/* Modified for LDC (LLVM D Compiler) by Tomas Lindquist Olsen, 2007 */

module std.stdarg;

alias void* va_list;

T va_arg(T)(ref va_list vp)
{
    size_t size = T.sizeof > size_t.sizeof ? size_t.sizeof : T.sizeof;
    va_list vptmp = cast(va_list)((cast(size_t)vp + size - 1) &  ~(size - 1));
    vp = vptmp + T.sizeof;
    return *cast(T*)vptmp;
}