Mercurial > projects > ldc
diff tango/tango/core/Vararg.d @ 132:1700239cab2e trunk
[svn r136] MAJOR UNSTABLE UPDATE!!!
Initial commit after moving to Tango instead of Phobos.
Lots of bugfixes...
This build is not suitable for most things.
author | lindquist |
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date | Fri, 11 Jan 2008 17:57:40 +0100 |
parents | |
children | a27941d00351 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/tango/tango/core/Vararg.d Fri Jan 11 17:57:40 2008 +0100 @@ -0,0 +1,92 @@ +/** + * 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: Public Domain + * License: Public Domain + * Authors: Hauke Duden, Walter Bright + */ +module tango.core.Vararg; + + +version( GNU ) +{ + public import std.stdarg; +} +else +{ + /** + * The base vararg list type. + */ + alias void* va_list; + + + template va_start( T ) + { + /** + * 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( out va_list ap, inout T parmn ) + { + ap = cast(va_list) ( cast(void*) &parmn + ( ( T.sizeof + int.sizeof - 1 ) & ~( int.sizeof - 1 ) ) ); + } + } + + + template va_arg( T ) + { + /** + * 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( 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; + } +}