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-.\"	$NetBSD: fparseln.3,v 1.7 1999/07/02 15:49:12 simonb Exp $
-.\"
-.\" Copyright (c) 1997 Christos Zoulas.  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.
-.\" 3. All advertising materials mentioning features or use of this software
-.\"    must display the following acknowledgement:
-.\"	This product includes software developed by Christos Zoulas.
-.\" 4. The name of the author may not be used to endorse or promote products
-.\"    derived from this software without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
-.\"
-.Dd December 1, 1997
-.Dt FPARSELN 3
-.Os
-.Sh NAME
-.Nm fparseln
-.Nd return the next logical line from a stream
-.Sh LIBRARY
-.Lb libutil
-.Sh SYNOPSIS
-.Fd #include <util.h>
-.Ft "char *"
-.Fo "fparseln"
-.Fa "FILE *stream" "size_t *len" "size_t *lineno"
-.Fa "const char delim[3]" "int flags"
-.Fc
-.Sh DESCRIPTION
-The
-.Fn fparseln
-function
-returns a pointer to the next logical line from the stream referenced by
-.Fa stream .
-This string is
-.Dv NUL
-terminated and it is dynamicaly allocated on each invocation. It is the
-responsibility of the caller to free the pointer.
-.Pp
-By default, if a character is escaped, both it and the preceeding escape
-character will be present in the returned string.
-Various
-.Fa flags
-alter this behaviour.
-.Pp
-The meaning of the arguments is as follows:
-.Bl -tag -width "lineno"
-.It Fa stream
-The stream to read from.
-.It Fa len
-If not
-.Dv NULL ,
-the length of the string is stored in the memory location to which it
-points.
-.It Fa lineno
-If not
-.Dv NULL ,
-the value of the memory location to which is pointed to, is incremented
-by the number of lines actually read from the file.
-.It Fa delim
-Contains the escape, continuation, and comment characters.
-If a character is
-.Dv NUL
-then processing for that character is disabled.
-If
-.Dv NULL ,
-all characters default to values specified below.
-The contents of
-.Fa delim
-is as follows:
-.Bl -tag -width "delim[0]"
-.It Fa delim[0]
-The escape character, which defaults to
-.Cm \e ,
-is used to remove any special meaning from the next character.
-.It Fa delim[1]
-The continuation character, which defaults to
-.Cm \e ,
-is used to indicate that the next line should be concatenated with the
-current one if this character is the last character on the current line
-and is not escaped.
-.It Fa delim[2]
-The comment character, which defaults to
-.Cm # ,
-if not escaped indicates the beginning of a comment that extends until the
-end of the current line.
-.El
-.It Fa flags
-If non-zero, alter the operation of
-.Fn fparseln .
-The various flags, which may be
-.Em or Ns -ed
-together, are:
-.Bl -tag -width "FPARSELN_UNESCCOMM"
-.It Dv FPARSELN_UNESCCOMM
-Remove escape preceeding an escaped comment.
-.It Dv FPARSELN_UNESCCONT
-Remove escape preceeding an escaped continuation.
-.It Dv FPARSELN_UNESCESC
-Remove escape preceeding an escaped escape.
-.It Dv FPARSELN_UNESCREST
-Remove escape preceeding any other character.
-.It Dv FPARSELN_UNESCALL
-All of the above.
-.El
-.Pp
-.El
-.Sh RETURN VALUES
-Upon successful completion a pointer to the parsed line is returned;
-otherwise,
-.Dv NULL
-is returned.
-.Pp
-The
-.Fn fparseln
-function uses internally
-.Xr fgetln 3 ,
-so all error conditions that apply to
-.Xr fgetln 3 ,
-apply to
-.Fn fparseln .
-In addition
-.Fn fparseln
-may set
-.Va errno
-to
-.Bq Er ENOMEM
-and return
-.Dv NULL
-if it runs out of memory.
-.Sh SEE ALSO
-.Xr fgetln 3
-.Sh HISTORY
-The
-.Fn fparseln
-function first appeared in
-.Nx 1.4 .