crypto/gc-md2: Optimize and clarify code.

* lib/gc-gnulib.c (gc_hash_open): Comment out md2_init_ctx invocation.
* lib/gc-libgcrypt.c (gc_hash_open): Clarify why md2_init_ctx invocation
is not needed.

3 files changed, 13 insertions, 1 deletions

diff --git a/ChangeLog b/ChangeLog
index 90b0377f4c..54802599bc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,12 @@
 2019-08-24  Bruno Haible  <bruno@clisp.org>
 
+	crypto/gc-md2: Optimize and clarify code.
+	* lib/gc-gnulib.c (gc_hash_open): Comment out md2_init_ctx invocation.
+	* lib/gc-libgcrypt.c (gc_hash_open): Clarify why md2_init_ctx invocation
+	is not needed.
+
+2019-08-24  Bruno Haible  <bruno@clisp.org>
+
 	crypto/gc-md2: Add comment.
 	* lib/gc-libgcrypt.c: Add comment.
 
diff --git a/lib/gc-gnulib.c b/lib/gc-gnulib.c
index 62aa50a2ec..6fcb4a1c87 100644
--- a/lib/gc-gnulib.c
+++ b/lib/gc-gnulib.c
@@ -646,7 +646,8 @@ gc_hash_open (Gc_hash hash, Gc_hash_mode mode, gc_hash_handle * outhandle)
     {
 #if GNULIB_GC_MD2
     case GC_MD2:
-      md2_init_ctx (&ctx->md2Context);
+      /* Not needed, because ctx is already zero-initialized.  */
+      /*md2_init_ctx (&ctx->md2Context);*/
       break;
 #endif
 
diff --git a/lib/gc-libgcrypt.c b/lib/gc-libgcrypt.c
index 6c95712bf1..fbfd0a138f 100644
--- a/lib/gc-libgcrypt.c
+++ b/lib/gc-libgcrypt.c
@@ -270,9 +270,13 @@ gc_hash_open (Gc_hash hash, Gc_hash_mode mode, gc_hash_handle * outhandle)
 
   switch (hash)
     {
+#if GNULIB_GC_MD2
     case GC_MD2:
+      /* Not needed, because ctx is already zero-initialized.  */
+      /*md2_init_ctx (&ctx->md2Context);*/
       gcryalg = GCRY_MD_NONE;
       break;
+#endif
 
     case GC_MD4:
       gcryalg = GCRY_MD_MD4;