Mercurial > projects > ldc
diff druntime/src/common/core/vararg.d @ 1458:e0b2d67cfe7c
Added druntime (this should be removed once it works).
author | Robert Clipsham <robert@octarineparrot.com> |
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date | Tue, 02 Jun 2009 17:43:06 +0100 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/druntime/src/common/core/vararg.d Tue Jun 02 17:43:06 2009 +0100 @@ -0,0 +1,81 @@ +/** + * The vararg module is intended to facilitate vararg manipulation in D. + * It should be interface compatible with the C module "stdarg," and the + * two modules may share a common implementation if possible (as is done + * here). + * Copyright: Copyright Digital Mars 2000 - 2009. + * License: <a href="http://www.boost.org/LICENSE_1_0.txt>Boost License 1.0</a>. + * Authors: Walter Bright, Hauke Duden + * + * Copyright Digital Mars 2000 - 2009. + * Distributed under the Boost Software License, Version 1.0. + * (See accompanying file LICENSE_1_0.txt or copy at + * http://www.boost.org/LICENSE_1_0.txt) + */ +module core.vararg; + + +/** + * The base vararg list type. + */ +alias void* va_list; + + +/** + * This function initializes the supplied argument pointer for subsequent + * use by va_arg and va_end. + * + * Params: + * ap = The argument pointer to initialize. + * paramn = The identifier of the rightmost parameter in the function + * parameter list. + */ +void va_start(T) ( out va_list ap, inout T parmn ) +{ + ap = cast(va_list) ( cast(void*) &parmn + ( ( T.sizeof + int.sizeof - 1 ) & ~( int.sizeof - 1 ) ) ); +} + +/** + * This function returns the next argument in the sequence referenced by + * the supplied argument pointer. The argument pointer will be adjusted + * to point to the next arggument in the sequence. + * + * Params: + * ap = The argument pointer. + * + * Returns: + * The next argument in the sequence. The result is undefined if ap + * does not point to a valid argument. + */ +T va_arg(T) ( inout va_list ap ) +{ + T arg = *cast(T*) ap; + ap = cast(va_list) ( cast(void*) ap + ( ( T.sizeof + int.sizeof - 1 ) & ~( int.sizeof - 1 ) ) ); + return arg; +} + +/** + * This function cleans up any resources allocated by va_start. It is + * currently a no-op and exists mostly for syntax compatibility with + * the variadric argument functions for C. + * + * Params: + * ap = The argument pointer. + */ +void va_end( va_list ap ) +{ + +} + + +/** + * This function copied the argument pointer src to dst. + * + * Params: + * src = The source pointer. + * dst = The destination pointer. + */ +void va_copy( out va_list dst, va_list src ) +{ + dst = src; +}