minix/lib/nbsd_libc/gen/stringlist.3
Gianluca Guida b6cbf7203b Import unmodified NetBSD libc in trunk
This patch imports the unmodified current version of NetBSD libc.
The NetBSD includes are in /nbsd_include, while the libc code itself is 
split between lib/nbsd_libc and common/lib/libc.
2011-02-14 19:36:03 +00:00

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.\" $NetBSD: stringlist.3,v 1.15 2010/05/06 09:46:49 jruoho Exp $
.\"
.\" Copyright (c) 1997, 1999 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This file was contributed to The NetBSD Foundation by Luke Mewburn.
.\"
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.\" 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 NETBSD FOUNDATION, INC. 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 FOUNDATION OR CONTRIBUTORS
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\"
.Dd May 6, 2010
.Dt STRINGLIST 3
.Os
.Sh NAME
.Nm stringlist ,
.Nm sl_init ,
.Nm sl_add ,
.Nm sl_free ,
.Nm sl_find ,
.Nm sl_delete
.Nd stringlist manipulation functions
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In stringlist.h
.Ft StringList *
.Fn sl_init
.Ft int
.Fn sl_add "StringList *sl" "char *item"
.Ft void
.Fn sl_free "StringList *sl" "int freeall"
.Ft char *
.Fn sl_find "StringList *sl" "const char *item"
.Ft int
.Fn sl_delete "StringList *sl" "const char *item" "int freeit"
.Sh DESCRIPTION
The
.Nm
functions manipulate stringlists, which are lists of
strings that extend automatically if necessary.
.Pp
The
.Ar StringList
structure has the following definition:
.Bd -literal -offset indent
typedef struct _stringlist {
char **sl_str;
size_t sl_max;
size_t sl_cur;
} StringList;
.Ed
.Pp
where:
.Bl -tag -width "sl_str" -offset indent
.It Ar sl_str
is a pointer to the base of the array containing the list,
.It Ar sl_max
is the size of
.Ar sl_str ,
and
.It Ar sl_cur
is the offset in
.Ar sl_str
of the current element.
.El
.Pp
The following stringlist manipulation functions are available:
.Bl -tag -width "sl_delete()" -offset 2n
.It Fn sl_init
Create a stringlist.
Returns a pointer to a
.Ar StringList ,
or
.Dv NULL
in case of failure.
.It Fn sl_free
Releases memory occupied by
.Ar sl
and the
.Ar sl-\*[Gt]sl_str
array.
If
.Ar freeall
is non-zero, then each of the items within
.Ar sl-\*[Gt]sl_str
is released as well.
.It Fn sl_add
Add
.Ar item
to
.Ar sl-\*[Gt]sl_str
at
.Ar sl-\*[Gt]sl_cur ,
extending the size of
.Ar sl-\*[Gt]sl_str .
Returns zero upon success, \-1 upon failure.
.It Fn sl_find
Find
.Ar item
in
.Ar sl ,
returning
.Dv NULL
if it's not found.
.It Fn sl_delete
Remove
.Ar item
from the list.
If
.Ar freeit
is non-zero, the string is freed.
Returns
.Dv 0
if the name is found
and
.Dv \-1
if the name is not found.
.El
.Sh SEE ALSO
.Xr free 3 ,
.Xr malloc 3
.Sh HISTORY
The
.Nm
functions appeared in
.Nx 1.3 .