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authorChris Toshok <toshok@src.gnome.org>2000-03-27 14:29:58 +0800
committerChris Toshok <toshok@src.gnome.org>2000-03-27 14:29:58 +0800
commitb3b329b797f9943a656410a862a340264d92a4c5 (patch)
treee4694aea1bae2267a14452490fb066b082e411b7 /addressbook/backend/pas/pas-backend-file.c
parent23f5d783442507933a385aafec5bfdd6d5f72b5e (diff)
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(string_to_dbt): new function.
(pas_backend_file_process_create_card): use string_to_dbt (pas_backend_file_process_remove_card): likewise (pas_backend_file_process_modify_card): likewise (pas_backend_file_get_vcard): likewise (pas_backend_file_upgrade_db): new function, to upgrade a db file if we change the data format. (pas_backend_file_maybe_upgrade_db): check db version vs. current code version, and upgrade it necessary. (pas_backend_file_load_uri): call pas_backend_file_maybe_upgrade. svn path=/trunk/; revision=2178
Diffstat (limited to 'addressbook/backend/pas/pas-backend-file.c')
-rw-r--r--addressbook/backend/pas/pas-backend-file.c93
1 files changed, 76 insertions, 17 deletions
diff --git a/addressbook/backend/pas/pas-backend-file.c b/addressbook/backend/pas/pas-backend-file.c
index 0e8e3c79af..41a5daab8a 100644
--- a/addressbook/backend/pas/pas-backend-file.c
+++ b/addressbook/backend/pas/pas-backend-file.c
@@ -13,6 +13,9 @@
#include <pas-backend-file.h>
#include <pas-book.h>
+#define PAS_BACKEND_FILE_VERSION_NAME "PAS-DB-VERSION"
+#define PAS_BACKEND_FILE_VERSION "0.1"
+
static PASBackendClass *pas_backend_file_parent_class;
struct _PASBackendFilePrivate {
@@ -21,6 +24,13 @@ struct _PASBackendFilePrivate {
DB *file_db;
};
+static void
+string_to_dbt(const char *str, DBT *dbt)
+{
+ dbt->data = (void*)str;
+ dbt->size = strlen (str);
+}
+
static char *
pas_backend_file_create_unique_id (char *vcard)
{
@@ -38,13 +48,10 @@ pas_backend_file_process_create_card (PASBackend *backend,
int db_error;
char *id;
- id = pas_backend_file_create_unique (req->vcard);
-
- id_dbt.data = id;
- id_dbt.size = strlen(id_dbt.data);
+ id = pas_backend_file_create_unique_id (req->vcard);
- vcard_dbt.data = (void*)req->vcard;
- vcard_dbt.size = strlen(req->vcard);
+ string_to_dbt (id, &id_dbt);
+ string_to_dbt (req->vcard, &vcard_dbt);
db_error = db->put (db, &id_dbt, &vcard_dbt, 0);
@@ -81,8 +88,7 @@ pas_backend_file_process_remove_card (PASBackend *backend,
DBT id_dbt;
int db_error;
- id_dbt.data = (void*)req->id;
- id_dbt.size = strlen(req->id);
+ string_to_dbt (req->id, &id_dbt);
db_error = db->del (db, &id_dbt, 0);
@@ -116,11 +122,8 @@ pas_backend_file_process_modify_card (PASBackend *backend,
DBT id_dbt, vcard_dbt;
int db_error;
- id_dbt.data = (void*)req->id;
- id_dbt.size = strlen(req->id);
-
- vcard_dbt.data = (void*)req->vcard;
- vcard_dbt.size = strlen(req->vcard);
+ string_to_dbt (req->id, &id_dbt);
+ string_to_dbt (req->vcard, &vcard_dbt);
db_error = db->put (db, &id_dbt, &vcard_dbt, 0);
@@ -209,8 +212,7 @@ pas_backend_file_get_vcard (PASBook *book, const char *id)
bf = PAS_BACKEND_FILE (pas_book_get_backend (book));
db = bf->priv->file_db;
- id_dbt.data = (void*)id;
- id_dbt.size = strlen(id);
+ string_to_dbt (id, &id_dbt);
db_error = db->get (db, &id_dbt, &vcard_dbt, 0);
if (db_error == 0) {
@@ -237,6 +239,60 @@ pas_backend_file_extract_path_from_uri (const char *uri)
return g_strdup (uri + 5);
}
+static gboolean
+pas_backend_file_upgrade_db (PASBackendFile *bf, char *old_version)
+{
+ if (!strcmp (old_version, "0.0")) {
+ /* 0.0 is the same as 0.1, we just need to add the version */
+ DB *db = bf->priv->file_db;
+ DBT version_name_dbt, version_dbt;
+ int db_error;
+
+ string_to_dbt (PAS_BACKEND_FILE_VERSION_NAME, &version_name_dbt);
+ string_to_dbt (PAS_BACKEND_FILE_VERSION, &version_dbt);
+
+ db_error = db->put (db, &version_name_dbt, &version_dbt, 0);
+ if (db_error == 0)
+ return TRUE;
+ else
+ return FALSE;
+ }
+ else {
+ g_warning ("unsupported version '%s' found in PAS backend file\n",
+ old_version);
+ return FALSE;
+ }
+}
+
+static gboolean
+pas_backend_file_maybe_upgrade_db (PASBackendFile *bf)
+{
+ DB *db = bf->priv->file_db;
+ DBT version_name_dbt, version_dbt;
+ int db_error;
+ char *version;
+ gboolean ret_val = TRUE;
+
+ string_to_dbt (PAS_BACKEND_FILE_VERSION_NAME, &version_name_dbt);
+
+ db_error = db->get (db, &version_name_dbt, &version_dbt, 0);
+ if (db_error == 0) {
+ /* success */
+ version = g_strndup (version_dbt.data, version_dbt.size);
+ }
+ else {
+ /* key was not in file */
+ version = g_strdup ("0.0");
+ }
+
+ if (strcmp (version, PAS_BACKEND_FILE_VERSION))
+ ret_val = pas_backend_file_upgrade_db (bf, version);
+
+ g_free (version);
+
+ return ret_val;
+}
+
static void
pas_backend_file_load_uri (PASBackend *backend,
const char *uri)
@@ -250,8 +306,11 @@ pas_backend_file_load_uri (PASBackend *backend,
bf->priv->file_db = dbopen (filename, O_RDWR | O_CREAT, 0666, DB_HASH, NULL);
- if (bf->priv->file_db != NULL)
- bf->priv->loaded = TRUE;
+ if (bf->priv->file_db != NULL) {
+ if (pas_backend_file_maybe_upgrade_db (bf))
+ bf->priv->loaded = TRUE;
+ /* XXX what if we fail to upgrade it? */
+ }
else
g_warning ("pas_backend_file_load_uri failed for '%s'\n", filename);