/* str-list.h: Declarations for string lists.

   Copyright 1993, 1994, 2007 Karl Berry.
   Copyright 1999, 2005 Olaf Weber.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this library; if not, see <http://www.gnu.org/licenses/>.  */

#ifndef KPATHSEA_STR_LIST_H
#define KPATHSEA_STR_LIST_H

#include <kpathsea/c-proto.h>
#include <kpathsea/types.h>


/* Lists of strings; used for, e.g., directory lists.  */

typedef struct
{
  unsigned length;
  string *list;
} str_list_type;

#define STR_LIST_LENGTH(l) ((l).length)
#define STR_LIST(l) ((l).list)
#define STR_LIST_ELT(l, n) STR_LIST (l)[n]
#define STR_LIST_LAST_ELT(l) STR_LIST_ELT (l, STR_LIST_LENGTH (l) - 1)

/* Return a new, empty, list.  */
extern str_list_type str_list_init P1H(void);

/* Append the string S to the list L.  It's up to the caller to not
   deallocate S; we don't copy it.  Also up to the caller to terminate
   the list with a null entry.  */
extern void str_list_add P2H(str_list_type *l, string s);

/* Append all the elements from MORE to TARGET.  */
extern void str_list_concat P2H(str_list_type * target, str_list_type more);

/* Free the space for the list elements (but not the list elements
   themselves).  */
extern void str_list_free P1H(str_list_type *l);

/* Append each element of MORE to each element of TARGET.  */
extern void str_list_concat_elements
  P2H(str_list_type *target, str_list_type more);

/* Remove duplicate elements from L, freeing their space.  */
extern void str_list_uniqify P1H(str_list_type *l);

#endif /* not KPATHSEA_STR_LIST_H */
