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/***
*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);
}
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