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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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Disc2.iso
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vc98
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crt
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src
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vfwprint.c
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1998-06-17
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/***
*vfwprintf.c - fwprintf from variable arg list
*
* Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
* defines vfwprintf() - print formatted output, but take args from
* a stdargs pointer.
*
*******************************************************************************/
#include <cruntime.h>
#include <stdio.h>
#include <wchar.h>
#include <dbgint.h>
#include <stdarg.h>
#include <file2.h>
#include <internal.h>
#include <mtdll.h>
/***
*int vfwprintf(stream, format, ap) - print to file from varargs
*
*Purpose:
* Performs formatted output to a file. The arg list is a variable
* argument list pointer.
*
*Entry:
* FILE *stream - stream to write data to
* wchar_t *format - format string containing data format
* va_list ap - variable arg list pointer
*
*Exit:
* returns number of correctly output wide characters
* returns negative number if error occurred
*
*Exceptions:
*
*******************************************************************************/
int __cdecl vfwprintf (
FILE *str,
const wchar_t *format,
va_list ap
)
/*
* 'V'ariable argument 'F'ile (stream) 'W'char_t 'PRINT', 'F'ormatted
*/
{
REG1 FILE *stream;
REG2 int buffing;
REG3 int retval;
_ASSERTE(str != NULL);
_ASSERTE(format != NULL);
/* Init stream pointer */
stream = str;
_lock_str(stream);
buffing = _stbuf(stream);
retval = _woutput(stream,format,ap );
_ftbuf(buffing, stream);
_unlock_str(stream);
return(retval);
}