1 files changed, 113 insertions, 0 deletions

diff --git a/src/lib/sq/sq_exec.c b/src/lib/sq/sq_exec.c
new file mode 100644
index 000000000..d4690ee99
--- /dev/null
+++ b/src/lib/sq/sq_exec.c
@@ -0,0 +1,113 @@
+/*
+   This file is part of GNUnet
+   Copyright (C) 2018 GNUnet e.V.
+
+   GNUnet is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Affero General Public License as published
+   by the Free Software Foundation, either version 3 of the License,
+   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
+   Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+     SPDX-License-Identifier: AGPL3.0-or-later
+ */
+/**
+ * @file sq/sq_exec.c
+ * @brief helper functions for executing SQL statements
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "gnunet_sq_lib.h"
+
+
+/**
+ * Create a `struct GNUNET_SQ_ExecuteStatement` where errors are fatal.
+ *
+ * @param sql actual SQL statement
+ * @return initialized struct
+ */
+struct GNUNET_SQ_ExecuteStatement
+GNUNET_SQ_make_execute (const char *sql)
+{
+  struct GNUNET_SQ_ExecuteStatement es = {
+    .sql = sql,
+    .ignore_errors = GNUNET_NO
+  };
+
+  return es;
+}
+
+
+/**
+ * Create a `struct GNUNET_SQ_ExecuteStatement` where errors should
+ * be tolerated.
+ *
+ * @param sql actual SQL statement
+ * @return initialized struct
+ */
+struct GNUNET_SQ_ExecuteStatement
+GNUNET_SQ_make_try_execute (const char *sql)
+{
+  struct GNUNET_SQ_ExecuteStatement es = {
+    .sql = sql,
+    .ignore_errors = GNUNET_YES
+  };
+
+  return es;
+}
+
+
+/**
+ * Request execution of an array of statements @a es from Postgres.
+ *
+ * @param dbh database to execute the statements over
+ * @param es #GNUNET_PQ_PREPARED_STATEMENT_END-terminated array of prepared
+ *            statements.
+ * @return #GNUNET_OK on success (modulo statements where errors can be ignored)
+ *         #GNUNET_SYSERR on error
+ */
+enum GNUNET_GenericReturnValue
+GNUNET_SQ_exec_statements (sqlite3 *dbh,
+                           const struct GNUNET_SQ_ExecuteStatement *es)
+{
+  for (unsigned int i = 0; NULL != es[i].sql; i++)
+  {
+    char *emsg = NULL;
+
+    if (SQLITE_OK !=
+        sqlite3_exec (dbh,
+                      es[i].sql,
+                      NULL,
+                      NULL,
+                      &emsg))
+    {
+      if (es[i].ignore_errors)
+      {
+        GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+                    "Failed to run SQL `%s': %s\n",
+                    es[i].sql,
+                    emsg);
+      }
+      else
+      {
+        GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                    "Failed to run SQL `%s': %s\n",
+                    es[i].sql,
+                    emsg);
+        sqlite3_free (emsg);
+        return GNUNET_SYSERR;
+      }
+      sqlite3_free (emsg);
+    }
+  }
+  return GNUNET_OK;
+}
+
+
+/* end of sq_exec */