109 lines
3 KiB
C
109 lines
3 KiB
C
|
/* $NetBSD: fgetwln.c,v 1.4 2010/01/11 20:39:29 joerg Exp $ */
|
||
|
|
|
||
|
|
/*-
|
||
|
|
* Copyright (c) 2002-2004 Tim J. Robbins.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
* SUCH DAMAGE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <sys/cdefs.h>
|
||
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
||
|
|
#if 0
|
||
|
|
__FBSDID("$FreeBSD: src/lib/libc/stdio/fgetwln.c,v 1.2 2004/08/06 17:00:09 tjr Exp $");
|
||
|
|
#else
|
||
|
|
__RCSID("$NetBSD: fgetwln.c,v 1.4 2010/01/11 20:39:29 joerg Exp $");
|
||
|
|
#endif
|
||
|
|
#endif /* LIBC_SCCS and not lint */
|
||
|
|
|
||
|
|
#include "namespace.h"
|
||
|
|
#include <assert.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <limits.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <wchar.h>
|
||
|
|
#include "reentrant.h"
|
||
|
|
#include "local.h"
|
||
|
|
|
||
|
|
#ifdef __weak_alias
|
||
|
|
__weak_alias(fgetwln,_fgetwln)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Expand the line buffer. Return -1 on error.
|
||
|
|
#ifdef notdef
|
||
|
|
* The `new size' does not account for a terminating '\0',
|
||
|
|
* so we add 1 here.
|
||
|
|
#endif
|
||
|
|
*/
|
||
|
|
static int
|
||
|
|
__slbexpand(FILE *fp, size_t newsize)
|
||
|
|
{
|
||
|
|
void *p;
|
||
|
|
|
||
|
|
#ifdef notdef
|
||
|
|
++newsize;
|
||
|
|
#endif
|
||
|
|
_DIAGASSERT(fp != NULL);
|
||
|
|
|
||
|
|
if (_EXT(fp)->_fgetstr_len >= newsize)
|
||
|
|
return (0);
|
||
|
|
if ((p = realloc(_EXT(fp)->_fgetstr_buf, newsize)) == NULL)
|
||
|
|
return (-1);
|
||
|
|
_EXT(fp)->_fgetstr_buf = p;
|
||
|
|
_EXT(fp)->_fgetstr_len = newsize;
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
wchar_t *
|
||
|
|
fgetwln(FILE * __restrict fp, size_t *lenp)
|
||
|
|
{
|
||
|
|
wint_t wc;
|
||
|
|
size_t len;
|
||
|
|
|
||
|
|
FLOCKFILE(fp);
|
||
|
|
_SET_ORIENTATION(fp, 1);
|
||
|
|
|
||
|
|
len = 0;
|
||
|
|
while ((wc = __fgetwc_unlock(fp)) != WEOF) {
|
||
|
|
#define GROW 512
|
||
|
|
if (len * sizeof(wchar_t) >= _EXT(fp)->_fgetstr_len &&
|
||
|
|
__slbexpand(fp, (len + GROW) * sizeof(wchar_t)))
|
||
|
|
goto error;
|
||
|
|
*((wchar_t *)(void *)_EXT(fp)->_fgetstr_buf + len++) = wc;
|
||
|
|
if (wc == L'\n')
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (len == 0)
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
FUNLOCKFILE(fp);
|
||
|
|
*lenp = len;
|
||
|
|
return ((wchar_t *)(void *)_EXT(fp)->_fgetstr_buf);
|
||
|
|
|
||
|
|
error:
|
||
|
|
FUNLOCKFILE(fp);
|
||
|
|
*lenp = 0;
|
||
|
|
return (NULL);
|
||
|
|
}
|