* Compress VISIT records using zlib if available. This reduces the object

[citadel.git] / citadel / database.h

diff --git a/citadel/database.h b/citadel/database.h
index 52d00de40e6ea513ddfd6cbaa48f1565ee41efb2..420fe6d1837841d82a0b5fcc09bb65a365da65ef 100644 (file)
--- a/citadel/database.h
+++ b/citadel/database.h
@@ -1,3 +1,36 @@
-struct cdbdata *cdb_fetch(int cdb, void *key, int keylen);
-int cdb_store(int cdb, void *key, int keylen, void *data, int datalen);
-int cdb_delete(int cdb, void *key, int keylen);
+/* $Id$ */
+void defrag_databases (void);
+void open_databases (void);
+void close_databases (void);
+int cdb_store (int cdb, void *key, int keylen, void *data, int datalen);
+int cdb_delete (int cdb, void *key, int keylen);
+struct cdbdata *cdb_fetch (int cdb, void *key, int keylen);
+void cdb_free (struct cdbdata *cdb);
+void cdb_rewind (int cdb);
+struct cdbdata *cdb_next_item (int cdb);
+void cdb_close_cursor(int cdb);
+void cdb_begin_transaction(void);
+void cdb_end_transaction(void);
+void cdb_allocate_tsd(void);
+void cdb_free_tsd(void);
+void cdb_check_handles(void);
+void cdb_trunc(int cdb);
+
+/*
+ * Database records beginning with this magic number are assumed to
+ * be compressed.  In the event that a database record actually begins with
+ * this magic number, we *must* compress it whether we want to or not,
+ * because the fetch function will try to uncompress it anyway.
+ * 
+ * (No need to #ifdef this stuff; it compiles ok even if zlib is not present
+ * and doesn't declare anything so it won't bloat the code)
+ */
+#define COMPRESS_MAGIC 0xc0ffeeee
+
+struct CtdlCompressHeader {
+       int magic;
+       size_t uncompressed_len;
+       size_t compressed_len;
+};
+
+