Add hashes to images

Upon successfull reading an image file, this computes a SHA1 hash of the
image and saves it with the picture tag in the log file. When a file is
not successfully loaded (for example because the log was created on a
different computer) we look up the hash in a dictionary that maps hashes
to local file names.

That dictionary (actually two for both directions), is loaded on startup
and saved upon destruction of the main window.

Signed-off-by: Robert C. Helling <helling@atdotde.de>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 8 insertions, 1 deletions

diff --git a/qthelper.h b/qthelper.h
index a367a9dac..e164a41b6 100644
--- a/qthelper.h
+++ b/qthelper.h
@@ -7,6 +7,7 @@
 #include "dive.h"
 #include "divelist.h"
 #include <QTranslator>
+#include <QDir>
 
 // global pointers for our translation
 extern QTranslator *qtTranslator, *ssrfTranslator;
@@ -16,5 +17,11 @@ bool gpsHasChanged(struct dive *dive, struct dive *master, const QString &gps_te
 extern "C" const char *printGPSCoords(int lat, int lon);
 QList<int> getDivesInTrip(dive_trip_t *trip);
 QString gasToStr(struct gasmix gas);
-
+void read_hashes();
+void write_hashes();
+void updateHash(struct picture *picture);
+QByteArray hashFile(const QString filename);
+void add_hash(const QString filename, QByteArray &hash);
+QString localFilePath(const QString originalFilename);
+QString fileFromHash(char *hash);
 #endif // QTHELPER_H