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+/* str-list.h: declarations for string lists.
+
+ Copyright 1993, 1994, 2007, 2008, 2010, 2012, 2018 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>
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Lists of strings; used for, e.g., directory lists. */
+typedef struct
+{
+ unsigned length;
+ string *list;
+} str_list_type;
+
+/* Lists of const strings; used for, e.g., hash tables. */
+typedef struct
+{
+ unsigned length;
+ const_string *list;
+} cstr_list_type;
+
+#define STR_LIST_LENGTH(l) ((l).length)
+#define STR_LIST_EMPTY(l) (STR_LIST_LENGTH (l) == 0)
+
+#define STR_LIST(l) ((l).list)
+#define STR_LIST_ELT(l, n) (STR_LIST (l)[n])
+#define STR_LIST_FIRST_ELT(l) STR_LIST_ELT ((l), 0)
+#define STR_LIST_LAST_ELT(l) STR_LIST_ELT ((l), STR_LIST_LENGTH (l) - 1)
+
+#ifdef MAKE_KPSE_DLL /* libkpathsea internal only */
+
+/* Return a new, empty, list. */
+static inline str_list_type
+str_list_init (void)
+{
+ str_list_type ret;
+
+ STR_LIST_LENGTH (ret) = 0;
+ STR_LIST (ret) = NULL;
+
+ return ret;
+}
+static inline cstr_list_type
+cstr_list_init (void)
+{
+ cstr_list_type ret;
+
+ STR_LIST_LENGTH (ret) = 0;
+ STR_LIST (ret) = NULL;
+
+ return ret;
+}
+
+#endif /* MAKE_KPSE_DLL */
+
+/* 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 KPSEDLL void str_list_add (str_list_type *l, string s);
+extern KPSEDLL void cstr_list_add (cstr_list_type *l, const_string s);
+
+#ifdef MAKE_KPSE_DLL /* libkpathsea internal only */
+
+/* Append all the elements from MORE to TARGET. */
+extern void str_list_concat (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 (str_list_type *l);
+
+/* Append each element of MORE to each element of TARGET. */
+extern void str_list_concat_elements
+ (str_list_type *target, str_list_type more);
+
+/* Remove duplicate elements from L, freeing their space. */
+extern void str_list_uniqify (str_list_type *l);
+
+#endif /* MAKE_KPSE_DLL */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* not KPATHSEA_STR_LIST_H */