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, 7 insertions, 1 deletions

diff --git a/load-git.c b/load-git.c
index 053a7140e..be25e8e94 100644
--- a/load-git.c
+++ b/load-git.c
@@ -828,6 +828,12 @@ static void parse_picture_gps(char *line, struct membuffer *str, void *_pic)
 	pic->longitude = parse_degrees(line, &line);
 }
 
+static void parse_picture_hash(char *line, struct membuffer *str, void *_pic)
+{
+	struct picture *pic = _pic;
+	pic->hash = get_utf8(str);
+}
+
 /* These need to be sorted! */
 struct keyword_action dc_action[] = {
 #undef D
@@ -900,7 +906,7 @@ static void settings_parser(char *line, struct membuffer *str, void *_unused)
 static struct keyword_action picture_action[] = {
 #undef D
 #define D(x) { #x, parse_picture_ ## x }
-	D(filename), D(gps)
+	D(filename), D(gps), D(hash)
 };
 
 static void picture_parser(char *line, struct membuffer *str, void *_pic)