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+/*
+
+    arfnet2-search: Fast file indexer and search
+    Copyright (C) 2023 arf20 (Ángel Ruiz Fernandez)
+
+    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 <https://www.gnu.org/licenses/>.
+
+    index.c: Efficient fast file index
+
+*/
+
+#ifndef _INDEX_H
+#define _INDEX_H
+
+#include <sys/stat.h>
+#include <stddef.h>
+
+typedef enum {
+    LOOKUP_SUBSTR,
+    LOOKUP_SUBSTR_NOCASE,
+    LOOKUP_REGEX
+} lookup_type_t;
+
+typedef struct {
+    char *name;
+    struct stat stat;
+    const char *mime;
+} node_data_t;
+
+typedef struct map_s *index_t;
+
+int index_init();
+void index_deinit();
+index_t index_new(size_t icapacity, const char *root);
+int index_lookup(index_t index, lookup_type_t type, const char *query,
+    const node_data_t **results);
+void index_destroy(index_t index);
+
+#endif /* _INDEX_H */
+