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/* Copyright (C) 2004 Manuel Novoa III <mjn3@codepoet.org>
*
* GNU Library General Public License (LGPL) version 2 or later.
*
* Dedicated to Toni. See uClibc/DEDICATION.mjn3 for details.
*/
#include "_stdio.h"
#include <stdarg.h>
#include <wchar.h>
#ifndef __STDIO_BUFFERS
#warning Skipping vswprintf since no buffering!
#else /* __STDIO_BUFFERS */
int vswprintf(wchar_t *__restrict buf, size_t size,
const wchar_t * __restrict format, va_list arg)
{
FILE f;
int rv;
/* __STDIO_STREAM_RESET_GCS(&f); */
#ifdef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__
f.__cookie = &(f.__filedes);
f.__gcs.read = NULL;
f.__gcs.write = NULL;
f.__gcs.seek = NULL;
f.__gcs.close = NULL;
#endif
f.__filedes = __STDIO_STREAM_FAKE_VSWPRINTF_FILEDES;
f.__modeflags = (__FLAG_WIDE|__FLAG_WRITEONLY|__FLAG_WRITING);
f.__ungot_width[0] = 0;
#ifdef __STDIO_MBSTATE
__INIT_MBSTATE(&(f.__state));
#endif /* __STDIO_MBSTATE */
#ifdef __UCLIBC_HAS_THREADS__
f.__user_locking = 1; /* Set user locking. */
__stdio_init_mutex(&f.__lock);
#endif
f.__nextopen = NULL;
if (size > ((SIZE_MAX - (size_t) buf)/sizeof(wchar_t))) {
size = ((SIZE_MAX - (size_t) buf)/sizeof(wchar_t));
}
f.__bufstart = (char *) buf;
f.__bufend = (char *)(buf + size);
__STDIO_STREAM_INIT_BUFREAD_BUFPOS(&f);
__STDIO_STREAM_DISABLE_GETC(&f);
__STDIO_STREAM_DISABLE_PUTC(&f);
rv = vfwprintf(&f, format, arg);
/* NOTE: Return behaviour differs from snprintf... */
if (f.__bufpos == f.__bufend) {
rv = -1;
if (size) {
f.__bufpos = (char *)(((wchar_t *) f.__bufpos) - 1);
}
}
if (size) {
*((wchar_t *) f.__bufpos) = 0;
}
return rv;
}
#endif /* __STDIO_BUFFERS */
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