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-rw-r--r--e-util/ChangeLog8
-rw-r--r--e-util/Makefile.am2
-rw-r--r--e-util/e-dbhash.c194
-rw-r--r--e-util/e-dbhash.h45
4 files changed, 249 insertions, 0 deletions
diff --git a/e-util/ChangeLog b/e-util/ChangeLog
index 9cad1815d6..f30bfe7724 100644
--- a/e-util/ChangeLog
+++ b/e-util/ChangeLog
@@ -1,3 +1,11 @@
+2000-11-07 JP Rosevear <jpr@helixcode.com>
+
+ * Makefile.am: Build e-dbhash.[hc]
+
+ * e-dbhash.[hc]: New routines to manage a db database on disk that
+ contains md5 hashed data and indexed by uids. Provides comparison
+ functions and such so the caller does not have to do the md5 bits.
+
200-10-30 Kjartan Maraas <kmaraas@gnome.org>
* e-dialog-widgets.c: #include <string.h> to quench warning.
diff --git a/e-util/Makefile.am b/e-util/Makefile.am
index a2c25b0501..856cecf46a 100644
--- a/e-util/Makefile.am
+++ b/e-util/Makefile.am
@@ -31,6 +31,8 @@ libeutil_la_SOURCES = \
e-list.h \
e-sexp.c \
e-sexp.h \
+ e-dbhash.c \
+ e-dbhash.h \
md5-utils.c \
md5-utils.h
diff --git a/e-util/e-dbhash.c b/e-util/e-dbhash.c
new file mode 100644
index 0000000000..57cf8ff9c1
--- /dev/null
+++ b/e-util/e-dbhash.c
@@ -0,0 +1,194 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*
+ * Author:
+ * JP Rosevear (jpr@helixcode.com)
+ *
+ * Copyright 2000, Helix Code, Inc.
+ */
+
+#include <config.h>
+#include <string.h>
+#include <fcntl.h>
+#ifdef HAVE_DB_185_H
+#include <db_185.h>
+#else
+#ifdef HAVE_DB1_DB_H
+#include <db1/db.h>
+#else
+#include <db.h>
+#endif
+#endif
+#include "md5-utils.h"
+#include "e-dbhash.h"
+
+struct _EDbHashPrivate
+{
+ DB *db;
+};
+
+EDbHash *
+e_dbhash_new (const char *filename)
+{
+ EDbHash *edbh;
+ DB *db;
+
+ /* Attempt to open the database */
+ db = dbopen (filename, O_RDWR, 0666, DB_HASH, NULL);
+ if (db == NULL) {
+ db = dbopen (filename, O_RDWR | O_CREAT, 0666, DB_HASH, NULL);
+
+ if (db == NULL)
+ return NULL;
+ }
+
+ edbh = g_new (EDbHash, 1);
+ edbh->priv = g_new (EDbHashPrivate, 1);
+ edbh->priv->db = db;
+
+ return edbh;
+}
+
+static void
+string_to_dbt(const char *str, DBT *dbt)
+{
+ dbt->data = (void*)str;
+ dbt->size = strlen (str) + 1;
+}
+
+void
+e_dbhash_add (EDbHash *edbh, const gchar *key, const gchar *data)
+{
+ DB *db;
+ DBT dkey;
+ DBT ddata;
+ guchar local_hash[16];
+
+ g_return_if_fail (edbh != NULL);
+ g_return_if_fail (edbh->priv != NULL);
+ g_return_if_fail (edbh->priv->db != NULL);
+ g_return_if_fail (key != NULL);
+ g_return_if_fail (data != NULL);
+
+ db = edbh->priv->db;
+
+ /* Key dbt */
+ string_to_dbt (key, &dkey);
+
+ /* Data dbt */
+ md5_get_digest (data, strlen (data), local_hash);
+ string_to_dbt (local_hash, &ddata);
+
+ /* Add to database */
+ db->put (db, &dkey, &ddata, 0);
+
+ g_free (local_hash);
+}
+
+void
+e_dbhash_remove (EDbHash *edbh, const char *key)
+{
+ DB *db;
+ DBT dkey;
+
+ g_return_if_fail (edbh != NULL);
+ g_return_if_fail (edbh->priv != NULL);
+ g_return_if_fail (key != NULL);
+
+ db = edbh->priv->db;
+
+ /* Key dbt */
+ string_to_dbt (key, &dkey);
+
+ /* Remove from database */
+ db->del (db, &dkey, 0);
+}
+
+void
+e_dbhash_foreach_key (EDbHash *edbh, EDbHashFunc *func, gpointer user_data)
+{
+ DB *db;
+ DBT dkey;
+ DBT ddata;
+ int db_error = 0;
+
+ g_return_if_fail (edbh != NULL);
+ g_return_if_fail (edbh->priv != NULL);
+ g_return_if_fail (func != NULL);
+
+ db = edbh->priv->db;
+
+ db_error = db->seq(db, &dkey, &ddata, R_FIRST);
+
+ while (db_error == 0) {
+ (*func) ((const char *)dkey.data, user_data);
+
+ db_error = db->seq(db, &dkey, &ddata, R_NEXT);
+ }
+}
+
+EDbHashStatus
+e_dbhash_compare (EDbHash *edbh, const char *key, const char *compare_data)
+{
+ DB *db;
+ DBT dkey;
+ DBT ddata;
+ guchar compare_hash[16];
+
+ g_return_val_if_fail (edbh != NULL, FALSE);
+ g_return_val_if_fail (edbh->priv != NULL, FALSE);
+ g_return_val_if_fail (key != NULL, FALSE);
+ g_return_val_if_fail (compare_hash != NULL, FALSE);
+
+ db = edbh->priv->db;
+
+ /* Key dbt */
+ string_to_dbt (key, &dkey);
+
+ /* Lookup in database */
+ db->get (db, &dkey, &ddata, 0);
+
+ /* Compare */
+ if (ddata.data) {
+ md5_get_digest (compare_data, strlen (compare_data), compare_hash);
+
+ if (memcmp (ddata.data, compare_hash, sizeof (guchar) * 16))
+ return E_DBHASH_STATUS_DIFFERENT;
+ } else {
+ return E_DBHASH_STATUS_NOT_FOUND;
+ }
+
+ return E_DBHASH_STATUS_SAME;
+}
+
+void
+e_dbhash_write (EDbHash *edbh)
+{
+ DB *db;
+
+ g_return_if_fail (edbh != NULL);
+ g_return_if_fail (edbh->priv != NULL);
+
+ db = edbh->priv->db;
+
+ /* Flush database to disk */
+ db->sync (db, 0);
+}
+
+void
+e_dbhash_destroy (EDbHash *edbh)
+{
+ DB *db;
+
+ g_return_if_fail (edbh != NULL);
+ g_return_if_fail (edbh->priv != NULL);
+
+ db = edbh->priv->db;
+
+ /* Close datbase */
+ db->close (db);
+
+ g_free (edbh->priv);
+ g_free (edbh);
+}
+
+
diff --git a/e-util/e-dbhash.h b/e-util/e-dbhash.h
new file mode 100644
index 0000000000..11fcdceb80
--- /dev/null
+++ b/e-util/e-dbhash.h
@@ -0,0 +1,45 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*
+ * Writes hashes that go to/from disk in db form. Hash keys are strings
+ *
+ * Author:
+ * JP Rosevear (jpr@helixcode.com)
+ *
+ * Copyright 2000, Helix Code, Inc.
+ */
+
+#ifndef __E_DBHASH_H__
+#define __E_DBHASH_H__
+
+#include <glib.h>
+
+typedef enum {
+ E_DBHASH_STATUS_SAME,
+ E_DBHASH_STATUS_DIFFERENT,
+ E_DBHASH_STATUS_NOT_FOUND,
+} EDbHashStatus;
+
+typedef struct _EDbHash EDbHash;
+typedef struct _EDbHashPrivate EDbHashPrivate;
+
+struct _EDbHash
+{
+ EDbHashPrivate *priv;
+};
+
+typedef void (*EDbHashFunc) (const char *key, gpointer user_data);
+
+EDbHash *e_dbhash_new (const char *filename);
+
+void e_dbhash_add (EDbHash *edbh, const char *key, const char *data);
+void e_dbhash_remove (EDbHash *edbh, const char *key);
+
+EDbHashStatus e_dbhash_compare (EDbHash *edbh, const char *key, const char *compare_data);
+void e_dbhash_foreach_key (EDbHash *edbh, EDbHashFunc *func, gpointer user_data);
+
+void e_dbhash_write (EDbHash *edbh);
+
+void e_dbhash_destroy (EDbHash *edbh);
+
+#endif /* ! __E_DBHASH_H__ */
+
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