/***
*swprintf.c - print formatted to string
*
*	Copyright (c) 1985-1992, Microsoft Corporation. All rights reserved.
*
*Purpose:
*	defines swprintf() and _snwprintf() - print formatted data to string
*
*Revision History:
*	05-16-92  KRS	Created from sprintf.c
*       02-18-93  SRW   Make FILE a local and remove lock usage.
*
*******************************************************************************/

#include <cruntime.h>
#include <stdio.h>
#include <wchar.h>
#include <assert.h>
#include <stdarg.h>
#include <internal.h>
#include <limits.h>
#include <os2dll.h>

#define MAXSTR INT_MAX


/***
#ifndef _COUNT_
*int swprintf(string, format, ...) - print formatted data to string
#else
*int _snwprintf(string, cnt, format, ...) - print formatted data to string
#endif
*
*Purpose:
*	Prints formatted data to the using the format string to
*	format data and getting as many arguments as called for
*	Sets up a FILE so file i/o operations can be used, make
*	string look like a huge buffer to it, but _flsbuf will
*	refuse to flush it if it fills up.  Appends '\0' to make
*	it a true string. _output does the real work here
*
*	Allocate the 'fake' _iob[] entry statically instead of on
*	the stack so that other routines can assume that _iob[]
*	entries are in are in DGROUP and, thus, are near.
*
#ifdef _COUNT_
*	The _snwprintf() flavor takes a count argument that is
*	the max number of wide characters that should be written to the
*	user's buffer.
#endif
*
*	Multi-thread: (1) Since there is no stream, this routine must
*	never try to get the stream lock (i.e., there is no stream
*	lock either). (2) Also, since there is only one statically
*	allocated 'fake' iob, we must lock/unlock to prevent collisions.
*
*Entry:
*	wchar_t *string - pointer to place to put output
#ifdef _COUNT_
*	size_t count - max number of wide characters to put in buffer
#endif
*	wchar_t *format - format string to control data format/number
*	of arguments followed by list of arguments, number and type
*	controlled by format string
*
*Exit:
*	returns number of wide characters printed
*
*Exceptions:
*
*******************************************************************************/

#ifndef _COUNT_

int _CALLTYPE2 swprintf (
	wchar_t *string,
	const wchar_t *format,
	...
	)
#else

int _CALLTYPE2 _snwprintf (
	wchar_t *string,
	size_t count,
	const wchar_t *format,
	...
	)
#endif

{
        FILE str;
	REG1 FILE *outfile = &str;
	va_list arglist;
	REG2 int retval;

	va_start(arglist, format);

	assert(string != NULL);
	assert(format != NULL);

	outfile->_flag = _IOWRT|_IOSTRG;
	outfile->_ptr = outfile->_base = (char *) string;
#ifndef _COUNT_
	outfile->_cnt = MAXSTR;
#else
	outfile->_cnt = count*sizeof(wchar_t);
#endif

	retval = _woutput(outfile,format,arglist);

	_putc_lk('\0',outfile); /* no-lock version */
	_putc_lk('\0',outfile); /* 2nd null byte for wchar_t version */

	return(retval);
}