mirror of
https://github.com/autc04/Retro68.git
synced 2024-09-07 13:54:33 +00:00
183 lines
5.1 KiB
C
183 lines
5.1 KiB
C
/*-
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
FUNCTION
|
|
<<fgetws>>, <<fgetws_unlocked>>---get wide character string from a file or stream
|
|
|
|
INDEX
|
|
fgetws
|
|
INDEX
|
|
fgetws_unlocked
|
|
INDEX
|
|
_fgetws_r
|
|
INDEX
|
|
_fgetws_unlocked_r
|
|
|
|
SYNOPSIS
|
|
#include <wchar.h>
|
|
wchar_t *fgetws(wchar_t *__restrict <[ws]>, int <[n]>,
|
|
FILE *__restrict <[fp]>);
|
|
|
|
#define _GNU_SOURCE
|
|
#include <wchar.h>
|
|
wchar_t *fgetws_unlocked(wchar_t *__restrict <[ws]>, int <[n]>,
|
|
FILE *__restrict <[fp]>);
|
|
|
|
#include <wchar.h>
|
|
wchar_t *_fgetws_r(struct _reent *<[ptr]>, wchar_t *<[ws]>,
|
|
int <[n]>, FILE *<[fp]>);
|
|
|
|
#include <wchar.h>
|
|
wchar_t *_fgetws_unlocked_r(struct _reent *<[ptr]>, wchar_t *<[ws]>,
|
|
int <[n]>, FILE *<[fp]>);
|
|
|
|
DESCRIPTION
|
|
Reads at most <[n-1]> wide characters from <[fp]> until a newline
|
|
is found. The wide characters including to the newline are stored
|
|
in <[ws]>. The buffer is terminated with a 0.
|
|
|
|
<<fgetws_unlocked>> is a non-thread-safe version of <<fgetws>>.
|
|
<<fgetws_unlocked>> may only safely be used within a scope
|
|
protected by flockfile() (or ftrylockfile()) and funlockfile(). This
|
|
function may safely be used in a multi-threaded program if and only
|
|
if they are called while the invoking thread owns the (FILE *)
|
|
object, as is the case after a successful call to the flockfile() or
|
|
ftrylockfile() functions. If threads are disabled, then
|
|
<<fgetws_unlocked>> is equivalent to <<fgetws>>.
|
|
|
|
The <<_fgetws_r>> and <<_fgetws_unlocked_r>> functions are simply reentrant
|
|
version of the above and are passed an additional reentrancy structure
|
|
pointer: <[ptr]>.
|
|
|
|
RETURNS
|
|
<<fgetws>> returns the buffer passed to it, with the data
|
|
filled in. If end of file occurs with some data already
|
|
accumulated, the data is returned with no other indication. If
|
|
no data are read, NULL is returned instead.
|
|
|
|
PORTABILITY
|
|
<<fgetws>> is required by C99 and POSIX.1-2001.
|
|
|
|
<<fgetws_unlocked>> is a GNU extension.
|
|
*/
|
|
|
|
#include <_ansi.h>
|
|
#include <reent.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <wchar.h>
|
|
#include "local.h"
|
|
|
|
#ifdef __IMPL_UNLOCKED__
|
|
#define _fgetws_r _fgetws_unlocked_r
|
|
#define fgetws fgetws_unlocked
|
|
#endif
|
|
|
|
wchar_t *
|
|
_fgetws_r (struct _reent *ptr,
|
|
wchar_t * ws,
|
|
int n,
|
|
FILE * fp)
|
|
{
|
|
wchar_t *wsp;
|
|
size_t nconv;
|
|
const char *src;
|
|
unsigned char *nl;
|
|
|
|
_newlib_flockfile_start (fp);
|
|
ORIENT (fp, 1);
|
|
|
|
if (n <= 0)
|
|
{
|
|
errno = EINVAL;
|
|
goto error;
|
|
}
|
|
|
|
if (fp->_r <= 0 && __srefill_r (ptr, fp))
|
|
/* EOF */
|
|
goto error;
|
|
wsp = ws;
|
|
do
|
|
{
|
|
src = (char *) fp->_p;
|
|
nl = memchr (fp->_p, '\n', fp->_r);
|
|
nconv = _mbsnrtowcs_r (ptr, wsp, &src,
|
|
/* Read all bytes up to the next NL, or up to the
|
|
end of the buffer if there is no NL. */
|
|
nl != NULL ? (nl - fp->_p + 1) : fp->_r,
|
|
/* But never more than n - 1 wide chars. */
|
|
n - 1,
|
|
&fp->_mbstate);
|
|
if (nconv == (size_t) -1)
|
|
/* Conversion error */
|
|
goto error;
|
|
if (src == NULL)
|
|
{
|
|
/*
|
|
* We hit a null byte. Increment the character count,
|
|
* since mbsnrtowcs()'s return value doesn't include
|
|
* the terminating null, then resume conversion
|
|
* after the null.
|
|
*/
|
|
nconv++;
|
|
src = memchr (fp->_p, '\0', fp->_r);
|
|
src++;
|
|
}
|
|
fp->_r -= (unsigned char *) src - fp->_p;
|
|
fp->_p = (unsigned char *) src;
|
|
n -= nconv;
|
|
wsp += nconv;
|
|
}
|
|
while (wsp[-1] != L'\n' && n > 1 && (fp->_r > 0
|
|
|| __srefill_r (ptr, fp) == 0));
|
|
if (wsp == ws)
|
|
/* EOF */
|
|
goto error;
|
|
if (!mbsinit (&fp->_mbstate))
|
|
/* Incomplete character */
|
|
goto error;
|
|
*wsp++ = L'\0';
|
|
_newlib_flockfile_exit (fp);
|
|
return ws;
|
|
|
|
error:
|
|
_newlib_flockfile_end (fp);
|
|
return NULL;
|
|
}
|
|
|
|
wchar_t *
|
|
fgetws (wchar_t *__restrict ws,
|
|
int n,
|
|
FILE *__restrict fp)
|
|
{
|
|
struct _reent *reent = _REENT;
|
|
|
|
CHECK_INIT (reent, fp);
|
|
return _fgetws_r (reent, ws, n, fp);
|
|
}
|