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, 2 insertions, 0 deletions

diff --git a/dive.c b/dive.c
index 758368615..fc0fbb855 100644
--- a/dive.c
+++ b/dive.c
@@ -392,6 +392,7 @@ static void copy_pl(struct picture *sp, struct picture *dp)
 {
 	*dp = *sp;
 	dp->filename = copy_string(sp->filename);
+	dp->hash = copy_string(sp->hash);
 }
 
 /* copy an element in a list of tags */
@@ -2936,6 +2937,7 @@ static void picture_free(struct picture *p)
 	if (!p)
 		return;
 	free(p->filename);
+	free(p->hash);
 	free(p);
 }
 void dive_remove_picture(char *filename)