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# str-list.h: Declarations for string lists.
#
# Copyright (C) 1993, 1994, 2011 Free Software Foundation, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#


#ifndef KPATHSEA_STR_LIST_H
#define KPATHSEA_STR_LIST_H

#include "c-proto.h"
#include "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);

#endif /* not KPATHSEA_STR_LIST_H */