81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
/*
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the University of California, Berkeley. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/* doc in vfwprintf.c */
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "%W% (Berkeley) %G%";
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#endif /* LIBC_SCCS and not lint */
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#include <_ansi.h>
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#include <reent.h>
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#include <stdio.h>
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#include <wchar.h>
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#include <limits.h>
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#include <stdarg.h>
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#include <errno.h>
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#include "local.h"
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int
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_vswprintf_r (struct _reent *ptr,
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wchar_t *str,
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size_t size,
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const wchar_t *fmt,
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va_list ap)
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{
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int ret;
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FILE f;
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if (size > INT_MAX / sizeof (wchar_t))
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{
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ptr->_errno = EOVERFLOW; /* POSIX extension */
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return EOF;
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}
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f._flags = __SWR | __SSTR;
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f._bf._base = f._p = (unsigned char *) str;
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f._bf._size = f._w = (size > 0 ? (size - 1) * sizeof (wchar_t) : 0);
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f._file = -1; /* No file. */
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ret = _svfwprintf_r (ptr, &f, fmt, ap);
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/* _svfwprintf_r() does not put in a terminating NUL, so add one if
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* appropriate, which is whenever size is > 0. _svfwprintf_r() stops
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* after n-1, so always just put at the end. */
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if (size > 0) {
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*(wchar_t *)f._p = L'\0'; /* terminate the string */
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}
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if(ret >= size) {
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/* _svfwprintf_r() returns how many wide characters it would have printed
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* if there were enough space. Return an error if too big to fit in str,
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* unlike snprintf, which returns the size needed. */
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ptr->_errno = EOVERFLOW; /* POSIX extension */
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ret = -1;
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}
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return ret;
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}
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#ifndef _REENT_ONLY
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int
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vswprintf (wchar_t *__restrict str,
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size_t size,
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const wchar_t *__restrict fmt,
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va_list ap)
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{
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return _vswprintf_r (_REENT, str, size, fmt, ap);
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}
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#endif /* !_REENT_ONLY */
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