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diff --git a/assoc.h b/assoc.h
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+/* assoc.h -- definitions for the interface exported by assoc.c that allows
+   the rest of the shell to manipulate associative array variables. */
+
+/* Copyright (C) 2008,2009-2021 Free Software Foundation, Inc.
+
+   This file is part of GNU Bash, the Bourne Again SHell.
+
+   Bash 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.
+
+   Bash 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 Bash.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _ASSOC_H_
+#define _ASSOC_H_
+
+#include "stdc.h"
+#include "hashlib.h"
+
+#define ASSOC_HASH_BUCKETS	1024
+
+#define assoc_empty(h)		((h)->nentries == 0)
+#define assoc_num_elements(h)	((h)->nentries)
+
+#define assoc_create(n)		(hash_create((n)))
+
+#define assoc_copy(h)		(hash_copy((h), 0))
+
+#define assoc_walk(h, f)	(hash_walk((h), (f))
+
+extern void assoc_dispose PARAMS((HASH_TABLE *));
+extern void assoc_flush PARAMS((HASH_TABLE *));
+
+extern int assoc_insert PARAMS((HASH_TABLE *, char *, char *));
+extern PTR_T assoc_replace PARAMS((HASH_TABLE *, char *, char *));
+extern void assoc_remove PARAMS((HASH_TABLE *, char *));
+
+extern char *assoc_reference PARAMS((HASH_TABLE *, char *));
+
+extern char *assoc_subrange PARAMS((HASH_TABLE *, arrayind_t, arrayind_t, int, int, int));
+extern char *assoc_patsub PARAMS((HASH_TABLE *, char *, char *, int));
+extern char *assoc_modcase PARAMS((HASH_TABLE *, char *, int, int));
+
+extern HASH_TABLE *assoc_quote PARAMS((HASH_TABLE *));
+extern HASH_TABLE *assoc_quote_escapes PARAMS((HASH_TABLE *));
+extern HASH_TABLE *assoc_dequote PARAMS((HASH_TABLE *));
+extern HASH_TABLE *assoc_dequote_escapes PARAMS((HASH_TABLE *));
+extern HASH_TABLE *assoc_remove_quoted_nulls PARAMS((HASH_TABLE *));
+
+extern char *assoc_to_kvpair PARAMS((HASH_TABLE *, int));
+extern char *assoc_to_assign PARAMS((HASH_TABLE *, int));
+
+extern WORD_LIST *assoc_to_word_list PARAMS((HASH_TABLE *));
+extern WORD_LIST *assoc_keys_to_word_list PARAMS((HASH_TABLE *));
+extern WORD_LIST *assoc_to_kvpair_list PARAMS((HASH_TABLE *));
+
+extern char *assoc_to_string PARAMS((HASH_TABLE *, char *, int));
+#endif /* _ASSOC_H_ */