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-rw-r--r--src/qt/optionsmodel.h13
1 files changed, 12 insertions, 1 deletions
diff --git a/src/qt/optionsmodel.h b/src/qt/optionsmodel.h
index 6f5c8b8c5c..b3260349e7 100644
--- a/src/qt/optionsmodel.h
+++ b/src/qt/optionsmodel.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2019 The Bitcoin Core developers
+// Copyright (c) 2011-2020 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
@@ -6,6 +6,7 @@
#define BITCOIN_QT_OPTIONSMODEL_H
#include <amount.h>
+#include <qt/guiconstants.h>
#include <QAbstractListModel>
@@ -16,6 +17,16 @@ class Node;
extern const char *DEFAULT_GUI_PROXY_HOST;
static constexpr unsigned short DEFAULT_GUI_PROXY_PORT = 9050;
+/**
+ * Convert configured prune target MiB to displayed GB. Round up to avoid underestimating max disk usage.
+ */
+static inline int PruneMiBtoGB(int64_t mib) { return (mib * 1024 * 1024 + GB_BYTES - 1) / GB_BYTES; }
+
+/**
+ * Convert displayed prune target GB to configured MiB. Round down so roundtrip GB -> MiB -> GB conversion is stable.
+ */
+static inline int64_t PruneGBtoMiB(int gb) { return gb * GB_BYTES / 1024 / 1024; }
+
/** Interface from Qt to configuration data structure for Bitcoin client.
To Qt, the options are presented as a list with the different options
laid out vertically.