update total_size as early as possible

This improves the success rate of ssdeep_try_reduce_blockhash and
thereby gives a significant speedup.

1 files changed, 3 insertions, 5 deletions

diff --git a/fuzzy.c b/fuzzy.c
index 83cf3ce..a6e238c 100644
--- a/fuzzy.c
+++ b/fuzzy.c
@@ -159,7 +159,7 @@ static void ssdeep_try_reduce_blockhash(struct ssdeep_context *self) {
 static const char *b64 =
 	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 
-static int ssdeep_engine_step(struct ssdeep_context *self, unsigned char c) {
+static void ssdeep_engine_step(struct ssdeep_context *self, unsigned char c) {
 	size_t h;
 	unsigned int i;
 	/* At each character we update the rolling hash and the normal hashes.
@@ -203,15 +203,13 @@ static int ssdeep_engine_step(struct ssdeep_context *self, unsigned char c) {
 		} else
 			ssdeep_try_reduce_blockhash(self);
 	}
-	++self->total_size;
-	return 0;
 }
 
 static int ssdeep_engine(struct ssdeep_context *self,
 		const unsigned char *buffer, size_t buffer_size) {
+	self->total_size += buffer_size;
 	for( ;buffer_size > 0; ++buffer, --buffer_size)
-		if(ssdeep_engine_step(self, *buffer) < 0)
-			return -1;
+		ssdeep_engine_step(self, *buffer);
 	return 0;
 }