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-rw-r--r--src/util/htable.h70
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diff --git a/src/util/htable.h b/src/util/htable.h
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+#ifndef _HTABLE_H_INCLUDED_
+#define _HTABLE_H_INCLUDED_
+
+/*++
+/* NAME
+/* htable 3h
+/* SUMMARY
+/* hash table manager
+/* SYNOPSIS
+/* #include <htable.h>
+/* DESCRIPTION
+/* .nf
+
+ /* Structure of one hash table entry. */
+
+typedef struct HTABLE_INFO {
+ char *key; /* lookup key */
+ void *value; /* associated value */
+ struct HTABLE_INFO *next; /* colliding entry */
+ struct HTABLE_INFO *prev; /* colliding entry */
+} HTABLE_INFO;
+
+ /* Structure of one hash table. */
+
+typedef struct HTABLE {
+ ssize_t size; /* length of entries array */
+ ssize_t used; /* number of entries in table */
+ HTABLE_INFO **data; /* entries array, auto-resized */
+ HTABLE_INFO **seq_bucket; /* current sequence hash bucket */
+ HTABLE_INFO **seq_element; /* current sequence element */
+} HTABLE;
+
+extern HTABLE *htable_create(ssize_t);
+extern HTABLE_INFO *htable_enter(HTABLE *, const char *, void *);
+extern HTABLE_INFO *htable_locate(HTABLE *, const char *);
+extern void *htable_find(HTABLE *, const char *);
+extern void htable_delete(HTABLE *, const char *, void (*) (void *));
+extern void htable_free(HTABLE *, void (*) (void *));
+extern void htable_walk(HTABLE *, void (*) (HTABLE_INFO *, void *), void *);
+extern HTABLE_INFO **htable_list(HTABLE *);
+extern HTABLE_INFO *htable_sequence(HTABLE *, int);
+
+#define HTABLE_SEQ_FIRST 0
+#define HTABLE_SEQ_NEXT 1
+#define HTABLE_SEQ_STOP (-1)
+
+ /*
+ * Correct only when casting (char *) to (void *).
+ */
+#define HTABLE_ACTION_FN_CAST(f) ((void *)(HTABLE_INFO *, void *)) (f)
+#define HTABLE_FREE_FN_CAST(f) ((void *)(void *)) (f)
+
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* IBM T.J. Watson Research
+/* P.O. Box 704
+/* Yorktown Heights, NY 10598, USA
+/* CREATION DATE
+/* Fri Feb 14 13:43:19 EST 1997
+/* LAST MODIFICATION
+/* %E% %U%
+/* VERSION/RELEASE
+/* %I%
+/*--*/
+
+#endif