mirror of
https://git.rtems.org/rtems-libbsd/
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Added fgetln()
This commit is contained in:
Jennifer Averett
@@ -84,6 +84,8 @@ C_FILES += lib/libc/string/strsep.c
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|||||||
C_FILES += lib/libc/isc/ev_streams.c
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C_FILES += lib/libc/isc/ev_streams.c
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C_FILES += lib/libc/isc/ev_timers.c
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C_FILES += lib/libc/isc/ev_timers.c
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C_FILES += lib/libc/stdio/fgetln.c
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# RTEMS Specific Files
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# RTEMS Specific Files
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# C_FILES += rtems/rtems-net-setup.c
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# C_FILES += rtems/rtems-net-setup.c
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C_FILES += rtems/syslog.c
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C_FILES += rtems/syslog.c
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125
freebsd-userspace/lib/libc/stdio/fgetln.3
Normal file
125
freebsd-userspace/lib/libc/stdio/fgetln.3
Normal file
@@ -0,0 +1,125 @@
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.\" Copyright (c) 1990, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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||||||
|
.\" modification, are permitted provided that the following conditions
|
||||||
|
.\" are met:
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||||||
|
.\" 1. Redistributions of source code must retain the above copyright
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||||||
|
.\" notice, this list of conditions and the following disclaimer.
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||||||
|
.\" 2. Redistributions in binary form must reproduce the above copyright
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||||||
|
.\" notice, this list of conditions and the following disclaimer in the
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||||||
|
.\" documentation and/or other materials provided with the distribution.
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||||||
|
.\" 4. Neither the name of the University nor the names of its contributors
|
||||||
|
.\" may be used to endorse or promote products derived from this software
|
||||||
|
.\" without specific prior written permission.
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||||||
|
.\"
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|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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||||||
|
.\" 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 REGENTS OR CONTRIBUTORS BE LIABLE
|
||||||
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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||||||
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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||||||
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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||||||
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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||||||
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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||||||
|
.\" SUCH DAMAGE.
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|
.\"
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|
.\" @(#)fgetln.3 8.3 (Berkeley) 4/19/94
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.\" $FreeBSD$
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.\"
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.Dd April 19, 1994
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.Dt FGETLN 3
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.Os
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|
.Sh NAME
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|
.Nm fgetln
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|
.Nd get a line from a stream
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|
.Sh LIBRARY
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|
.Lb libc
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|
.Sh SYNOPSIS
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.In stdio.h
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.Ft char *
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|
.Fn fgetln "FILE *stream" "size_t *len"
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|
.Sh DESCRIPTION
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|
The
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|
.Fn fgetln
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|
function
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|
returns a pointer to the next line from the stream referenced by
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|
.Fa stream .
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|
This line is
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|
.Em not
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|
a C string as it does not end with a terminating
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|
.Dv NUL
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|
character.
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|
The length of the line, including the final newline,
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|
is stored in the memory location to which
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|
.Fa len
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|
points.
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|
(Note, however, that if the line is the last
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|
in a file that does not end in a newline,
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|
the returned text will not contain a newline.)
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|
.Sh RETURN VALUES
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|
Upon successful completion a pointer is returned;
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|
this pointer becomes invalid after the next
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|
.Tn I/O
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|
operation on
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|
.Fa stream
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|
(whether successful or not)
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|
or as soon as the stream is closed.
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|
Otherwise,
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|
.Dv NULL
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|
is returned.
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|
The
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|
.Fn fgetln
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|
function
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|
does not distinguish between end-of-file and error; the routines
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|
.Xr feof 3
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|
and
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|
.Xr ferror 3
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|
must be used
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|
to determine which occurred.
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|
If an error occurs, the global variable
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|
.Va errno
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|
is set to indicate the error.
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|
The end-of-file condition is remembered, even on a terminal, and all
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|
subsequent attempts to read will return
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|
.Dv NULL
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|
until the condition is
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|
cleared with
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|
.Xr clearerr 3 .
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|
.Pp
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|
The text to which the returned pointer points may be modified,
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|
provided that no changes are made beyond the returned size.
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|
These changes are lost as soon as the pointer becomes invalid.
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|
.Sh ERRORS
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|
.Bl -tag -width Er
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|
.It Bq Er EBADF
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|
The argument
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|
.Fa stream
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|
is not a stream open for reading.
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|
.El
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|
.Pp
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|
The
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|
.Fn fgetln
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|
function
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|
may also fail and set
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.Va errno
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|
for any of the errors specified for the routines
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|
.Xr fflush 3 ,
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|
.Xr malloc 3 ,
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|
.Xr read 2 ,
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.Xr stat 2 ,
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|
or
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|
.Xr realloc 3 .
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|
.Sh SEE ALSO
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.Xr ferror 3 ,
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.Xr fgets 3 ,
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.Xr fgetwln 3 ,
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.Xr fopen 3 ,
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.Xr getline 3 ,
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.Xr putc 3
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|
.Sh HISTORY
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|
The
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|
.Fn fgetln
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|
function first appeared in
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|
.Bx 4.4 .
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169
freebsd-userspace/lib/libc/stdio/fgetln.c
Normal file
169
freebsd-userspace/lib/libc/stdio/fgetln.c
Normal file
@@ -0,0 +1,169 @@
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|
#include "port_before.h"
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|
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|
/*-
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|
* Copyright (c) 1990, 1993
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||||||
|
* The Regents of the University of California. All rights reserved.
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||||||
|
*
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||||||
|
* This code is derived from software contributed to Berkeley by
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||||||
|
* Chris Torek.
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|
*
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||||||
|
* 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.
|
||||||
|
* 4. Neither the name of the University nor the names of its contributors
|
||||||
|
* may be used to endorse or promote products derived from this software
|
||||||
|
* without specific prior written permission.
|
||||||
|
*
|
||||||
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
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||||||
|
*/
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|
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|
#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)fgetln.c 8.2 (Berkeley) 1/2/94";
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|
#endif /* LIBC_SCCS and not lint */
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|
#include <sys/cdefs.h>
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|
__FBSDID("$FreeBSD$");
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|
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|
#include "namespace.h"
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|
#include <stdio.h>
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|
#include <stdlib.h>
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|
#include <string.h>
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|
#include "un-namespace.h"
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|
#include "libc_private.h"
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|
#include "local.h"
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|
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||||||
|
/*
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||||||
|
* Expand the line buffer. Return -1 on error.
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|
#ifdef notdef
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||||||
|
* The `new size' does not account for a terminating '\0',
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|
* so we add 1 here.
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||||||
|
#endif
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||||||
|
*/
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||||||
|
int
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||||||
|
__slbexpand(FILE *fp, size_t newsize)
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||||||
|
{
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|
void *p;
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|
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||||||
|
#ifdef notdef
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||||||
|
++newsize;
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||||||
|
#endif
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||||||
|
if (fp->_lb._size >= newsize)
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||||||
|
return (0);
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||||||
|
if ((p = realloc(fp->_lb._base, newsize)) == NULL)
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||||||
|
return (-1);
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||||||
|
fp->_lb._base = p;
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||||||
|
fp->_lb._size = newsize;
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||||||
|
return (0);
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||||||
|
}
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||||||
|
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||||||
|
/*
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|
* Get an input line. The returned pointer often (but not always)
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||||||
|
* points into a stdio buffer. Fgetln does not alter the text of
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||||||
|
* the returned line (which is thus not a C string because it will
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||||||
|
* not necessarily end with '\0'), but does allow callers to modify
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||||||
|
* it if they wish. Thus, we set __SMOD in case the caller does.
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||||||
|
*/
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|
char *
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|
fgetln(FILE *fp, size_t *lenp)
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|
{
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||||||
|
unsigned char *p;
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||||||
|
size_t len;
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||||||
|
size_t off;
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||||||
|
|
||||||
|
FLOCKFILE(fp);
|
||||||
|
ORIENT(fp, -1);
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||||||
|
/* make sure there is input */
|
||||||
|
if (fp->_r <= 0 && __srefill(fp)) {
|
||||||
|
*lenp = 0;
|
||||||
|
FUNLOCKFILE(fp);
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||||||
|
return (NULL);
|
||||||
|
}
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||||||
|
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||||||
|
/* look for a newline in the input */
|
||||||
|
if ((p = memchr((void *)fp->_p, '\n', (size_t)fp->_r)) != NULL) {
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||||||
|
char *ret;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Found one. Flag buffer as modified to keep fseek from
|
||||||
|
* `optimising' a backward seek, in case the user stomps on
|
||||||
|
* the text.
|
||||||
|
*/
|
||||||
|
p++; /* advance over it */
|
||||||
|
ret = (char *)fp->_p;
|
||||||
|
*lenp = len = p - fp->_p;
|
||||||
|
#ifndef __rtems__
|
||||||
|
|
||||||
|
fp->_flags |= __SMOD;
|
||||||
|
#endif
|
||||||
|
fp->_r -= len;
|
||||||
|
fp->_p = p;
|
||||||
|
FUNLOCKFILE(fp);
|
||||||
|
return (ret);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* We have to copy the current buffered data to the line buffer.
|
||||||
|
* As a bonus, though, we can leave off the __SMOD.
|
||||||
|
*
|
||||||
|
* OPTIMISTIC is length that we (optimistically) expect will
|
||||||
|
* accomodate the `rest' of the string, on each trip through the
|
||||||
|
* loop below.
|
||||||
|
*/
|
||||||
|
#define OPTIMISTIC 80
|
||||||
|
|
||||||
|
for (len = fp->_r, off = 0;; len += fp->_r) {
|
||||||
|
size_t diff;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Make sure there is room for more bytes. Copy data from
|
||||||
|
* file buffer to line buffer, refill file and look for
|
||||||
|
* newline. The loop stops only when we find a newline.
|
||||||
|
*/
|
||||||
|
if (__slbexpand(fp, len + OPTIMISTIC))
|
||||||
|
goto error;
|
||||||
|
(void)memcpy((void *)(fp->_lb._base + off), (void *)fp->_p,
|
||||||
|
len - off);
|
||||||
|
off = len;
|
||||||
|
if (__srefill(fp))
|
||||||
|
break; /* EOF or error: return partial line */
|
||||||
|
if ((p = memchr((void *)fp->_p, '\n', (size_t)fp->_r)) == NULL)
|
||||||
|
continue;
|
||||||
|
|
||||||
|
/* got it: finish up the line (like code above) */
|
||||||
|
p++;
|
||||||
|
diff = p - fp->_p;
|
||||||
|
len += diff;
|
||||||
|
if (__slbexpand(fp, len))
|
||||||
|
goto error;
|
||||||
|
(void)memcpy((void *)(fp->_lb._base + off), (void *)fp->_p,
|
||||||
|
diff);
|
||||||
|
fp->_r -= diff;
|
||||||
|
fp->_p = p;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
*lenp = len;
|
||||||
|
#ifdef notdef
|
||||||
|
fp->_lb._base[len] = 0;
|
||||||
|
#endif
|
||||||
|
FUNLOCKFILE(fp);
|
||||||
|
return ((char *)fp->_lb._base);
|
||||||
|
|
||||||
|
error:
|
||||||
|
*lenp = 0; /* ??? */
|
||||||
|
FUNLOCKFILE(fp);
|
||||||
|
return (NULL); /* ??? */
|
||||||
|
}
|
||||||
142
freebsd-userspace/lib/libc/stdio/local.h
Normal file
142
freebsd-userspace/lib/libc/stdio/local.h
Normal file
@@ -0,0 +1,142 @@
|
|||||||
|
/*-
|
||||||
|
* Copyright (c) 1990, 1993
|
||||||
|
* The Regents of the University of California. All rights reserved.
|
||||||
|
*
|
||||||
|
* This code is derived from software contributed to Berkeley by
|
||||||
|
* Chris Torek.
|
||||||
|
*
|
||||||
|
* 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.
|
||||||
|
* 4. Neither the name of the University nor the names of its contributors
|
||||||
|
* may be used to endorse or promote products derived from this software
|
||||||
|
* without specific prior written permission.
|
||||||
|
*
|
||||||
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
||||||
|
*
|
||||||
|
* @(#)local.h 8.3 (Berkeley) 7/3/94
|
||||||
|
* $FreeBSD$
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <sys/types.h> /* for off_t */
|
||||||
|
#include <pthread.h>
|
||||||
|
#include <string.h>
|
||||||
|
#include <wchar.h>
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Information local to this implementation of stdio,
|
||||||
|
* in particular, macros and private variables.
|
||||||
|
*/
|
||||||
|
|
||||||
|
extern int _sread(FILE *, char *, int);
|
||||||
|
extern int _swrite(FILE *, char const *, int);
|
||||||
|
extern fpos_t _sseek(FILE *, fpos_t, int);
|
||||||
|
extern int _ftello(FILE *, fpos_t *);
|
||||||
|
extern int _fseeko(FILE *, off_t, int, int);
|
||||||
|
extern int __fflush(FILE *fp);
|
||||||
|
extern void __fcloseall(void);
|
||||||
|
extern wint_t __fgetwc(FILE *);
|
||||||
|
extern wint_t __fputwc(wchar_t, FILE *);
|
||||||
|
extern int __sflush(FILE *);
|
||||||
|
extern FILE *__sfp(void);
|
||||||
|
extern int __slbexpand(FILE *, size_t);
|
||||||
|
#ifndef __rtems__
|
||||||
|
extern int __srefill(FILE *);
|
||||||
|
#else
|
||||||
|
/*
|
||||||
|
* __srefill is used by fgetln(). The method is in newlib but the
|
||||||
|
* prototype is in a private .h which is not installed.
|
||||||
|
* allows it to be pulled from newlib.
|
||||||
|
*/
|
||||||
|
extern int __srefill_r(struct _reent *,FILE *);
|
||||||
|
|
||||||
|
#define __srefill(_x) __srefill_r(__getreent(), _x)
|
||||||
|
#endif
|
||||||
|
extern int __sread(void *, char *, int);
|
||||||
|
extern int __swrite(void *, char const *, int);
|
||||||
|
extern fpos_t __sseek(void *, fpos_t, int);
|
||||||
|
extern int __sclose(void *);
|
||||||
|
extern void __sinit(void);
|
||||||
|
extern void _cleanup(void);
|
||||||
|
extern void __smakebuf(FILE *);
|
||||||
|
extern int __swhatbuf(FILE *, size_t *, int *);
|
||||||
|
extern int _fwalk(int (*)(FILE *));
|
||||||
|
extern int __svfscanf(FILE *, const char *, __va_list);
|
||||||
|
extern int __swsetup(FILE *);
|
||||||
|
extern int __sflags(const char *, int *);
|
||||||
|
extern int __ungetc(int, FILE *);
|
||||||
|
extern wint_t __ungetwc(wint_t, FILE *);
|
||||||
|
extern int __vfprintf(FILE *, const char *, __va_list);
|
||||||
|
extern int __vfscanf(FILE *, const char *, __va_list);
|
||||||
|
extern int __vfwprintf(FILE *, const wchar_t *, __va_list);
|
||||||
|
extern int __vfwscanf(FILE * __restrict, const wchar_t * __restrict,
|
||||||
|
__va_list);
|
||||||
|
extern size_t __fread(void * __restrict buf, size_t size, size_t count,
|
||||||
|
FILE * __restrict fp);
|
||||||
|
extern int __sdidinit;
|
||||||
|
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Prepare the given FILE for writing, and return 0 iff it
|
||||||
|
* can be written now. Otherwise, return EOF and set errno.
|
||||||
|
*/
|
||||||
|
#define prepwrite(fp) \
|
||||||
|
((((fp)->_flags & __SWR) == 0 || \
|
||||||
|
((fp)->_bf._base == NULL && ((fp)->_flags & __SSTR) == 0)) && \
|
||||||
|
__swsetup(fp))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Test whether the given stdio file has an active ungetc buffer;
|
||||||
|
* release such a buffer, without restoring ordinary unread data.
|
||||||
|
*/
|
||||||
|
#define HASUB(fp) ((fp)->_ub._base != NULL)
|
||||||
|
#define FREEUB(fp) { \
|
||||||
|
if ((fp)->_ub._base != (fp)->_ubuf) \
|
||||||
|
free((char *)(fp)->_ub._base); \
|
||||||
|
(fp)->_ub._base = NULL; \
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* test for an fgetln() buffer.
|
||||||
|
*/
|
||||||
|
#define HASLB(fp) ((fp)->_lb._base != NULL)
|
||||||
|
#define FREELB(fp) { \
|
||||||
|
free((char *)(fp)->_lb._base); \
|
||||||
|
(fp)->_lb._base = NULL; \
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Structure initializations for 'fake' FILE objects.
|
||||||
|
*/
|
||||||
|
#define FAKE_FILE { \
|
||||||
|
._file = -1, \
|
||||||
|
._fl_mutex = PTHREAD_MUTEX_INITIALIZER, \
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Set the orientation for a stream. If o > 0, the stream has wide-
|
||||||
|
* orientation. If o < 0, the stream has byte-orientation.
|
||||||
|
*/
|
||||||
|
#ifdef __rtems__
|
||||||
|
#define ORIENT(fp, o)
|
||||||
|
#else
|
||||||
|
#define ORIENT(fp, o) do { \
|
||||||
|
if ((fp)->_orientation == 0) \
|
||||||
|
(fp)->_orientation = (o); \
|
||||||
|
} while (0)
|
||||||
|
#endif
|
||||||
Reference in New Issue
Block a user