mingw-w64-crt/stdio/mingw_vsprintf.c

/* vsprintf.c
 *
 * $Id: vsprintf.c,v 1.1 2008/08/11 22:41:55 keithmarshall Exp $
 *
 * Provides an implementation of the "vsprintf" function, conforming
 * generally to C99 and SUSv3/POSIX specifications, with extensions
 * to support Microsoft's non-standard format specifications.  This
 * is included in libmingwex.a, whence it may replace the Microsoft
 * function of the same name.
 *
 * Written by Keith Marshall <keithmarshall@users.sourceforge.net>
 *
 * This implementation of "vsprintf" will normally be invoked by calling
 * "__mingw_vsprintf()" in preference to a direct reference to "vsprintf()"
 * itself; this leaves the MSVCRT implementation as the default, which
 * will be deployed when user code invokes "vsprint()".  Users who then
 * wish to use this implementation may either call "__mingw_vsprintf()"
 * directly, or may use conditional preprocessor defines, to redirect
 * references to "vsprintf()" to "__mingw_vsprintf()".
 *
 * Compiling this module with "-D INSTALL_AS_DEFAULT" will change this
 * recommended convention, such that references to "vsprintf()" in user
 * code will ALWAYS be redirected to "__mingw_vsprintf()"; if this option
 * is adopted, then users wishing to use the MSVCRT implementation of
 * "vsprintf()" will be forced to use a "back-door" mechanism to do so.
 * Such a "back-door" mechanism is provided with MinGW, allowing the
 * MSVCRT implementation to be called as "__msvcrt_vsprintf()"; however,
 * since users may not expect this behaviour, a standard libmingwex.a
 * installation does not employ this option.
 *
 *
 * This is free software.  You may redistribute and/or modify it as you
 * see fit, without restriction of copyright.
 *
 * This software is provided "as is", in the hope that it may be useful,
 * but WITHOUT WARRANTY OF ANY KIND, not even any implied warranty of
 * MERCHANTABILITY, nor of FITNESS FOR ANY PARTICULAR PURPOSE.  At no
 * time will the author accept any form of liability for any damages,
 * however caused, resulting from the use of this software.
 *
 */
#include <stdio.h>
#include <stdarg.h>

#include "mingw_pformat.h"

int __cdecl __vsprintf (char *, const char *, va_list) __MINGW_NOTHROW;

int __cdecl __vsprintf( char *buf, const char *fmt, va_list argv )
{
  register int retval;
  buf[retval = __pformat( PFORMAT_NOLIMIT, buf, 0, fmt, argv )] = '\0';
  return retval;
}