1 files changed, 77 insertions, 0 deletions
diff --git a/src/sq/sq_query_helper.c b/src/sq/sq_query_helper.c
new file mode 100644
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+++ b/src/sq/sq_query_helper.c
@@ -0,0 +1,77 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2020 Taler Systems SA
+
+  TALER 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.
+
+  TALER 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
+  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file sq/sq_query_helper.c
+ * @brief helper functions for Taler-specific SQLite3 interactions
+ * @author Jonathan Buchanan
+ */
+#include "platform.h"
+#include <sqlite3.h>
+#include <gnunet/gnunet_util_lib.h>
+#include <gnunet/gnunet_sq_lib.h>
+#include "taler_sq_lib.h"
+
+
+/**
+ * Function called to convert input argument into SQL parameters.
+ *
+ * @param cls closure
+ * @param data pointer to input argument, here a `struct TALER_AmountNBO`
+ * @param data_len number of bytes in @a data (if applicable)
+ * @param stmt sqlite statement to parameters for
+ * @param off offset of the argument to bind in @a stmt, numbered from 1,
+ *            so immediately suitable for passing to `sqlite3_bind`-functions.
+ * @return #GNUNET_SYSERR on error, #GNUNET_OK on success
+ */
+static int
+qconv_amount_nbo (void *cls,
+                  const void *data,
+                  size_t data_len,
+                  sqlite3_stmt *stmt,
+                  unsigned int off)
+{
+  const struct TALER_AmountNBO *amount = data;
+
+  GNUNET_assert (sizeof (struct TALER_AmountNBO) == data_len);
+  if (SQLITE_OK != sqlite3_bind_int64 (stmt,
+                                       (int) off,
+                                       (sqlite3_int64) amount->value))
+    return GNUNET_SYSERR;
+  if (SQLITE_OK != sqlite3_bind_int64 (stmt,
+                                       (int) off + 1,
+                                       (sqlite3_int64) amount->fraction))
+    return GNUNET_SYSERR;
+  return GNUNET_OK;
+}
+
+
+/**
+ * Generate query parameter for a currency, consisting of the three
+ * components "value", "fraction" in this order. The
+ * types must be a 64-bit integer and a 64-bit integer.
+ *
+ * @param x pointer to the query parameter to pass
+ */
+struct GNUNET_SQ_QueryParam
+TALER_SQ_query_param_amount_nbo (const struct TALER_AmountNBO *x)
+{
+  struct GNUNET_SQ_QueryParam res =
+  { &qconv_amount_nbo, NULL, x, sizeof (*x), 2 };
+  return res;
+}
+
+
+/* end of sq/sq_query_helper.c */