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[GNUnet-SVN] r20648 - gnunet/src/include
From: |
gnunet |
Subject: |
[GNUnet-SVN] r20648 - gnunet/src/include |
Date: |
Wed, 21 Mar 2012 14:33:51 +0100 |
Author: grothoff
Date: 2012-03-21 14:33:51 +0100 (Wed, 21 Mar 2012)
New Revision: 20648
Added:
gnunet/src/include/gnunet_mysql_lib.h
Log:
-fix
Added: gnunet/src/include/gnunet_mysql_lib.h
===================================================================
--- gnunet/src/include/gnunet_mysql_lib.h (rev 0)
+++ gnunet/src/include/gnunet_mysql_lib.h 2012-03-21 13:33:51 UTC (rev
20648)
@@ -0,0 +1,164 @@
+/*
+ This file is part of GNUnet
+ (C) 2012 Christian Grothoff (and other contributing authors)
+
+ GNUnet is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3, or (at your
+ option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+/**
+ * @file include/gnunet_mysql_lib.h
+ * @brief library to help with access to a MySQL database
+ * @author Christian Grothoff
+ */
+#ifndef GNUNET_MYSQL_LIB_H
+#define GNUNET_MYSQL_LIB_H
+
+#include "gnunet_util_lib.h"
+#include "gnunet_bandwidth_lib.h"
+#include "gnunet_statistics_service.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#if 0 /* keep Emacsens' auto-indent happy */
+}
+#endif
+#endif
+
+
+/**
+ * Mysql context.
+ */
+struct GNUNET_MYSQL_Context;
+
+
+/**
+ * Handle for a prepared statement.
+ */
+struct GNUNET_MYSQL_StatementHandle;
+
+
+/**
+ * Type of a callback that will be called for each
+ * data set returned from MySQL.
+ *
+ * @param cls user-defined argument
+ * @param num_values number of elements in values
+ * @param values values returned by MySQL
+ * @return GNUNET_OK to continue iterating, GNUNET_SYSERR to abort
+ */
+typedef int (*GNUNET_MYSQL_DataProcessor) (void *cls, unsigned int num_values,
+ MYSQL_BIND * values);
+
+
+/**
+ * Create a mysql context.
+ *
+ * @param cfg configuration
+ * @param section configuration section to use to get MySQL configuration
options
+ * @return the mysql context
+ */
+struct GNUNET_MYSQL_Context *
+GNUNET_MYSQL_context_create (const struct GNUNET_CONFIGURATION_Handle *cfg,
+ const char *section);
+
+
+/**
+ * Destroy a mysql context. Also frees all associated prepared statements.
+ *
+ * @param mc context to destroy
+ */
+void
+GNUNET_MYSQL_context_destroy (struct GNUNET_MYSQL_Context *mc);
+
+
+/**
+ * Prepare a statement. Prepared statements are automatically discarded
+ * when the MySQL context is destroyed.
+ *
+ * @param mc mysql context
+ * @param query query text
+ * @return prepared statement, NULL on error
+ */
+struct GNUNET_MYSQL_StatementHandle *
+GNUNET_MYSQL_statement_prepare (struct GNUNET_MYSQL_Context *mc,
+ const char *query);
+
+
+/**
+ * Run a SQL statement.
+ *
+ * @param mc mysql context
+ * @param sql SQL statement to run
+ * @return GNUNET_OK on success
+ * GNUNET_SYSERR if there was a problem
+ */
+int
+GNUNET_MYSQL_statement_run (struct GNUNET_MYSQL_Context *mc,
+ const char *sql);
+
+
+/**
+ * Run a prepared SELECT statement.
+ *
+ * @param mc mysql context
+ * @param sh handle to SELECT statment
+ * @param result_size number of elements in results array
+ * @param results pointer to already initialized MYSQL_BIND
+ * array (of sufficient size) for passing results
+ * @param processor function to call on each result
+ * @param processor_cls extra argument to processor
+ * @param ... pairs and triplets of "MYSQL_TYPE_XXX" keys and their respective
+ * values (size + buffer-reference for pointers); terminated
+ * with "-1"
+ * @return GNUNET_SYSERR on error, otherwise
+ * the number of successfully affected (or queried) rows
+ */
+int
+GNUNET_MYSQL_statement_run_prepared_select (struct GNUNET_MYSQL_Context *mc,
+ struct GNUNET_MYSQL_StatementHandle
*sh,
+ unsigned int result_size,
MYSQL_BIND * results,
+ GNUNET_MYSQL_DataProcessor
processor,
+ void *processor_cls, ...);
+
+
+/**
+ * Run a prepared statement that does NOT produce results.
+ *
+ * @param mc mysql context
+ * @param sh handle to statment
+ * @param insert_id NULL or address where to store the row ID of whatever
+ * was inserted (only for INSERT statements!)
+ * @param ... pairs and triplets of "MYSQL_TYPE_XXX" keys and their respective
+ * values (size + buffer-reference for pointers); terminated
+ * with "-1"
+ * @return GNUNET_SYSERR on error, otherwise
+ * the number of successfully affected rows
+ */
+int
+GNUNET_MYSQL_statement_run_prepared (struct GNUNET_MYSQL_Context *mc,
+ struct GNUNET_MYSQL_StatementHandle *sh,
+ unsigned long long *insert_id, ...);
+
+
+#if 0 /* keep Emacsens' auto-indent happy */
+{
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+/* end of gnunet_mysql_lib.h */
+#endif
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