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diff --git a/kmicromail/libetpan/tools/mail_cache_db.h b/kmicromail/libetpan/tools/mail_cache_db.h
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+/*
+ * libEtPan! -- a mail stuff library
+ *
+ * Copyright (C) 2001, 2002 - DINH Viet Hoa
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the libEtPan! project nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * $Id$
+ */
+
+#ifndef MAIL_CACHE_DB_H
+
+#define MAIL_CACHE_DB_H
+
+#include <sys/types.h>
+#include "mail_cache_db_types.h"
+#include "chash.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+  this module will handle a database "f(key) -> value" in a file
+  
+  berkeley DB or other can be used for implementation of low-level file.
+*/
+
+/*
+  mail_cache_db_open()
+  
+  This function opens the file "filename".
+  The pointer return in pcache_db should be used for further references
+  to the database.
+*/
+
+int mail_cache_db_open(const char * filename,
+    struct mail_cache_db ** pcache_db);
+
+/*
+  mail_cache_db_close()
+  
+  This function closes the opened database.
+  The pointer cannot be used later.
+*/
+
+void mail_cache_db_close(struct mail_cache_db * cache_db);
+
+/*
+  mail_cache_db_open_lock()
+  
+  This function opens and locks the file "filename".
+  The pointer return in pcache_db should be used for further references
+  to the database.
+*/
+
+int mail_cache_db_open_lock(const char * filename,
+    struct mail_cache_db ** pcache_db);
+
+/*
+  mail_cache_db_open_unlock()
+  
+  This function closes and unlocks the opened database.
+  The pointer cannot be used later.
+*/
+
+void mail_cache_db_close_unlock(const char * filename,
+    struct mail_cache_db * cache_db);
+
+/*
+  mail_cache_db_put()
+  
+  This function will store a given key and value in the database.
+*/
+
+int mail_cache_db_put(struct mail_cache_db * cache_db,
+    const void * key, size_t key_len, const void * value, size_t value_len);
+
+/*
+  mail_cache_db_get()
+  
+  This function will retrieve the value corresponding to a given key
+  from the database.
+*/
+
+int mail_cache_db_get(struct mail_cache_db * cache_db,
+    const void * key, size_t key_len, void ** pvalue, size_t * pvalue_len);
+
+/*
+  mail_cache_db_del()
+
+  This function will delete the given key and the corresponding value
+  from the database.
+*/
+
+int mail_cache_db_del(struct mail_cache_db * cache_db,
+    const void * key, size_t key_len);
+
+/*
+  mail_cache_clean_up()
+
+  This function will delete the key all the key/value pairs of the
+  database file which key does not exist in the given hash.
+*/
+
+int mail_cache_db_clean_up(struct mail_cache_db * cache_db,
+    chash * exist);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif