From 2b9edf6fd1219d2d354381ade73b70f6ed800573 Mon Sep 17 00:00:00 2001
From: Philipp Schafft <lion@lion.leolix.org>
Date: Wed, 21 Oct 2020 18:41:33 +0000
Subject: [PATCH] Feature: Added support to copy a digest

---
 src/digest.c | 15 +++++++++++++++
 src/digest.h |  1 +
 2 files changed, 16 insertions(+)

diff --git a/src/digest.c b/src/digest.c
index 2c0e8918..99834424 100644
--- a/src/digest.c
+++ b/src/digest.c
@@ -381,6 +381,21 @@ digest_t * digest_new(digest_algo_t algo)
     return digest;
 }
 
+digest_t *  digest_copy(digest_t *digest)
+{
+    digest_t *n;
+
+    if (!digest)
+        return NULL;
+
+    n = refobject_new__new(digest_t, NULL, NULL, NULL);
+    n->algo = digest->algo;
+    n->done = digest->done;
+    n->state = digest->state;
+
+    return n;
+}
+
 ssize_t digest_write(digest_t *digest, const void *data, size_t len)
 {
     if (!digest || !data)
diff --git a/src/digest.h b/src/digest.h
index dc4db598..e0cba4ef 100644
--- a/src/digest.h
+++ b/src/digest.h
@@ -25,6 +25,7 @@ const char *digest_algo_id2str(digest_algo_t algo);
 ssize_t     digest_algo_length_bytes(digest_algo_t algo);
 
 digest_t *  digest_new(digest_algo_t algo);
+digest_t *  digest_copy(digest_t *digest);
 ssize_t     digest_write(digest_t *digest, const void *data, size_t len);
 ssize_t     digest_read(digest_t *digest, void *buf, size_t len);