53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
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/* vsnprintf.c
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*
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* $Id: vsnprintf.c,v 1.3 2008/07/28 23:24:20 keithmarshall Exp $
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*
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* Provides an implementation of the "vsnprintf" function, conforming
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* generally to C99 and SUSv3/POSIX specifications, with extensions
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* to support Microsoft's non-standard format specifications. This
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* is included in libmingwex.a, replacing the redirection through
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* libmoldnames.a, to the MSVCRT standard "_vsnprintf" function; (the
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* standard MSVCRT function remains available, and may be invoked
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* directly, using this fully qualified form of its name).
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*
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* Written by Keith Marshall <keithmarshall@users.sourceforge.net>
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*
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* This is free software. You may redistribute and/or modify it as you
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* see fit, without restriction of copyright.
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*
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* This software is provided "as is", in the hope that it may be useful,
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* but WITHOUT WARRANTY OF ANY KIND, not even any implied warranty of
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* MERCHANTABILITY, nor of FITNESS FOR ANY PARTICULAR PURPOSE. At no
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* time will the author accept any form of liability for any damages,
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* however caused, resulting from the use of this software.
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*
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*/
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#include <stdio.h>
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#include <stdarg.h>
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#include "mingw_pformat.h"
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int __cdecl __vsnprintf (APICHAR *, size_t, const APICHAR *fmt, va_list) __MINGW_NOTHROW;
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int __cdecl __vsnprintf(APICHAR *buf, size_t length, const APICHAR *fmt, va_list argv )
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{
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register int retval;
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if( length == (size_t)(0) )
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/*
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* No buffer; simply compute and return the size required,
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* without actually emitting any data.
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*/
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return __pformat( 0, buf, 0, fmt, argv);
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/* If we get to here, then we have a buffer...
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* Emit data up to the limit of buffer length less one,
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* then add the requisite NUL terminator.
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*/
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retval = __pformat( 0, buf, --length, fmt, argv );
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buf[retval < (int) length ? retval : (int)length] = '\0';
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return retval;
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}
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