diff options
author | Christopher Faylor <me@cgf.cx> | 2000-02-17 22:38:33 +0300 |
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committer | Christopher Faylor <me@cgf.cx> | 2000-02-17 22:38:33 +0300 |
commit | 1fd5e000ace55b323124c7e556a7a864b972a5c4 (patch) | |
tree | dc4fcf1e5e22a040716ef92c496b8d94959b2baa /winsup/mingw/include/stdarg.h | |
parent | 369d8a8fd5e887eca547bf34bccfdf755c9e5397 (diff) |
import winsup-2000-02-17 snapshot
Diffstat (limited to 'winsup/mingw/include/stdarg.h')
-rw-r--r-- | winsup/mingw/include/stdarg.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/winsup/mingw/include/stdarg.h b/winsup/mingw/include/stdarg.h new file mode 100644 index 000000000..6db01aa35 --- /dev/null +++ b/winsup/mingw/include/stdarg.h @@ -0,0 +1,109 @@ +/* + * stdarg.h + * + * Provides facilities for stepping through a list of function arguments of + * an unknown number and type. + * + * NOTE: Gcc should provide stdarg.h, and I believe their version will work + * with crtdll. If necessary I think you can replace this with the GCC + * stdarg.h. + * + * Note that the type used in va_arg is supposed to match the actual type + * *after default promotions*. Thus, va_arg (..., short) is not valid. + * + * This file is part of the Mingw32 package. + * + * Contributors: + * Created by Colin Peters <colin@bird.fu.is.saga-u.ac.jp> + * + * THIS SOFTWARE IS NOT COPYRIGHTED + * + * This source code is offered for use in the public domain. You may + * use, modify or distribute it freely. + * + * This code is distributed in the hope that it will be useful but + * WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY + * DISCLAMED. This includes but is not limited to warranties of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * + * $Revision$ + * $Author$ + * $Date$ + * + */ + +#ifndef _STDARG_H_ +#define _STDARG_H_ + +/* All the headers include this file. */ +#include <_mingw.h> + +/* + * Don't do any of this stuff for the resource compiler. + */ +#ifndef RC_INVOKED + +/* + * I was told that Win NT likes this. + */ +#ifndef _VA_LIST_DEFINED +#define _VA_LIST_DEFINED +#endif + +#ifndef _VA_LIST +#define _VA_LIST +typedef char* va_list; +#endif + + +/* + * Amount of space required in an argument list (ie. the stack) for an + * argument of type t. + */ +#define __va_argsiz(t) \ + (((sizeof(t) + sizeof(int) - 1) / sizeof(int)) * sizeof(int)) + + +/* + * Start variable argument list processing by setting AP to point to the + * argument after pN. + */ +#ifdef __GNUC__ +/* + * In GNU the stack is not necessarily arranged very neatly in order to + * pack shorts and such into a smaller argument list. Fortunately a + * neatly arranged version is available through the use of __builtin_next_arg. + */ +#define va_start(ap, pN) \ + ((ap) = ((va_list) __builtin_next_arg(pN))) +#else +/* + * For a simple minded compiler this should work (it works in GNU too for + * vararg lists that don't follow shorts and such). + */ +#define va_start(ap, pN) \ + ((ap) = ((va_list) (&pN) + __va_argsiz(pN))) +#endif + + +/* + * End processing of variable argument list. In this case we do nothing. + */ +#define va_end(ap) ((void)0) + + +/* + * Increment ap to the next argument in the list while returing a + * pointer to what ap pointed to first, which is of type t. + * + * We cast to void* and then to t* because this avoids a warning about + * increasing the alignment requirement. + */ + +#define va_arg(ap, t) \ + (((ap) = (ap) + __va_argsiz(t)), \ + *((t*) (void*) ((ap) - __va_argsiz(t)))) + +#endif /* Not RC_INVOKED */ + +#endif /* not _STDARG_H_ */ |