.\" Copyright 2007-2008 Roy Marples
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.Dd Dec 24, 2007
.Dt RC_STRLIST 3 SMM
.Os OpenRC
.Sh NAME
.Nm rc_strlist_add , rc_strlist_addu , rc_strlist_addsort ,
.Nm rc_strlist_addsortc , rc_strlist_addsortu , rc_strlist_delete ,
.Nm rc_strlist_join , rc_strlist_reverse , rc_strlist_free
.Nd RC string list functions
.Sh LIBRARY
Run Command library (librc, -lrc)
.Sh SYNOPSIS
.In rc.h
.Ft "char *" Fn rc_strlist_add "char ***list" "const char *item"
.Ft "char *" Fn rc_strlist_addu "char ***list" "const char *item"
.Ft "char *" Fn rc_strlist_addsort "char ***list" "const char *item"
.Ft "char *" Fn rc_strlist_addsortc "char ***list" "const char *item"
.Ft "char *" Fn rc_strlist_addsortu "char ***list" "const char *item"
.Ft bool Fn rc_strlist_delete "char ***list" "const char *item"
.Ft "char *" Fn rc_strlist_join "char ***list1" "const char **list2"
.Ft void Fn rc_strlist_reverse "char **list"
.Ft void Fn rc_strlist_free "char **list"
.Sh DESCRIPTION
These functions provide an easy means of manipulating string lists without
the need for custom structures or non standard macros.
.Pp
.Fn rc_strlist_add
adds a malloced copy of
.Fa item
to
.Fa list ,
realloced to accomodate the new item. It returns a pointer to the new item on
success, or NULL on failure and sets
.Va errno
accordingly.
.Fn rc_strlist_addu
and
.Fn rc_strlist_addsortu
only work if
.Fa list
does not already contain
.Fa item .
.Fn rc_strlist_addsort
adds the item to the list in a lexically sorted position, using
.Nm strcoll ,
whereas
.Fn rc_strlist_addsortc
uses
.Nm strcmp .
.Pp
.Fn rc_strlist_delete
removes and frees
.Fa item
from
.Fa list ,
retuning true on success, otherwise false.
.Pp
.Fn rc_strlist_join
appends
.Fa list2
to the end of
.Fa list1
and returns a pointer to the last item on the new list.
.Pp
.Fn rc_strlist_reverse
reverses the items on
.Fa list .
.Pp
.Fn rc_strlist_free
frees each item on
.Fa list
and the
.Fa list
itself.
.Sh SEE ALSO
.Xr malloc 3 ,
.Xr free 3 ,
.Xr strcmp 3 ,
.Xr strcoll 3
.Sh AUTHORS
.An "Roy Marples" Aq roy@marples.name