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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/***
*swprintf.c - print formatted to string
*
*Purpose:
* defines _swprintf(), _swprintf_c and _snwprintf() - print formatted data
* to string
*
*******************************************************************************/
#include <string.h>
#include <errno.h>
#include <limits.h>
#include "internal_securecrt.h"
#include "mbusafecrt_internal.h"
/***
*ifndef _COUNT_
*int _swprintf(string, format, ...) - print formatted data to string
*else
*ifndef _SWPRINTFS_ERROR_RETURN_FIX
*int _snwprintf(string, cnt, format, ...) - print formatted data to string
*else
*int _swprintf_c(string, cnt, format, ...) - print formatted data to string
*endif
*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.
*
* We alias swprintf to _swprintf
*
*ifdef _COUNT_
*ifndef _SWPRINTFS_ERROR_RETURN_FIX
* The _snwprintf() flavor takes a count argument that is
* the max number of wide characters that should be written to the
* user's buffer.
* We don't expose this function directly in the headers.
*else
* The _swprintf_c() flavor does the same thing as the _snwprintf
* above, but, it also fixes a issue in the return value in the case
* when there isn't enough space to write the null terminator
* We don't fix this issue in _snwprintf because of backward
* compatibility. In new code, however, _snwprintf is #defined to
* _swprintf_c so users get the fix.
*
*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:
*
*******************************************************************************/
DLLEXPORT int __cdecl swprintf_s (
wchar_t *string,
size_t sizeInWords,
const wchar_t *format,
...
)
{
int ret;
va_list arglist;
va_start(arglist, format);
ret = vswprintf_s(string, sizeInWords, format, arglist);
va_end(arglist);
return ret;
}
DLLEXPORT int __cdecl _snwprintf_s (
wchar_t *string,
size_t sizeInWords,
size_t count,
const wchar_t *format,
...
)
{
int ret;
va_list arglist;
va_start(arglist, format);
ret = _vsnwprintf_s(string, sizeInWords, count, format, arglist);
va_end(arglist);
return ret;
}
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