56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
|
/* vsnprintf.c
|
||
|
|
*
|
||
|
|
* $Id$
|
||
|
|
*
|
||
|
|
* Provides an implementation of the "vsnprintf" 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, replacing the redirection through
|
||
|
|
* libmoldnames.a, to the MSVCRT standard "_vsnprintf" function; (the
|
||
|
|
* standard MSVCRT function remains available, and may be invoked
|
||
|
|
* directly, using this fully qualified form of its name).
|
||
|
|
*
|
||
|
|
* Written by Keith Marshall <keithmarshall@users.sourceforge.net>
|
||
|
|
*
|
||
|
|
* 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 "pformat.h"
|
||
|
|
|
||
|
|
int __cdecl __vsnprintf (char *, size_t, const char *fmt, va_list) __MINGW_NOTHROW;
|
||
|
|
int __cdecl __mingw_alias(vsnprintf) (char *, size_t, const char *, va_list) __MINGW_NOTHROW;
|
||
|
|
|
||
|
|
int __cdecl __vsnprintf( char *buf, size_t length, const char *fmt, va_list argv )
|
||
|
|
{
|
||
|
|
register int retval;
|
||
|
|
|
||
|
|
if( length == (size_t)(0) )
|
||
|
|
/*
|
||
|
|
* No buffer; simply compute and return the size required,
|
||
|
|
* without actually emitting any data.
|
||
|
|
*/
|
||
|
|
return __pformat( 0, buf, 0, fmt, argv );
|
||
|
|
|
||
|
|
/* If we get to here, then we have a buffer...
|
||
|
|
* Emit data up to the limit of buffer length less one,
|
||
|
|
* then add the requisite NUL terminator.
|
||
|
|
*/
|
||
|
|
retval = __pformat( 0, buf, --length, fmt, argv );
|
||
|
|
buf[retval < length ? retval : length] = '\0';
|
||
|
|
|
||
|
|
return retval;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* $RCSfile$Revision$: end of file */
|