root/kern/include/stdarg.h

INCLUDED FROM

   1 /*
   2  * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
   3  *      The President and Fellows of Harvard College.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  30 #ifndef _STDARG_H_
  31 #define _STDARG_H_
  34 /* Get __PF() for declaring printf-like functions. */
  35 #include <cdefs.h>
  37 /*
  38  * As of gcc 3.0, the stdarg declarations can be made
  39  * machine-independent because gcc abstracts the implementations away
  40  * for us.
  41  */
  43 #ifdef __GNUC__
  44 typedef __va_list va_list;
  46 #define va_start(ap, fmt)  __builtin_stdarg_start(ap, fmt)
  47 #define va_arg(ap,t)       __builtin_va_arg(ap, t)
  48 #define va_copy(ap1, ap2)  __builtin_va_copy(ap1, ap2)
  49 #define va_end(ap)         __builtin_va_end(ap)
  50 #endif
  52 /*
  53  * The v... versions of printf functions in <lib.h>. This is not
  54  * really the best place for them... but if we put them in <lib.h>
  55  * we'd need to either include this file there, put these defs there,
  56  * or split the definition of va_list into another header file, none
  57  * of which seems entirely desirable.
  58  */
  59 void vkprintf(const char *fmt, va_list ap) __PF(1,0);
  60 int vsnprintf(char *buf, size_t maxlen, const char *fmt, va_list ap) __PF(3,0);
  62 /*
  63  * The printf driver function (shared with libc).
  64  * Does v...printf, passing the output data piecemeal to the function
  65  * supplied. The "clientdata" argument is passed through to the function.
  66  * The strings passed to the function might not be null-terminated; the
  67  * supplied length should be used explicitly.
  68  */
  69 int __vprintf(void (*func)(void *clientdata, const char *str, size_t len), 
  70               void *clientdata, const char *format, va_list ap) __PF(3,0);
  73 #endif /* _STDARG_H_ */