[PATCH 2/8] crypto: make crypto ctx initialization an array

[David Bremner <david@tethera.net>]

From: Jani Nikula <jani@nikula.org>

Make it trivial to add handlers for new protocols without duplicating
code. No functional changes.
---
 crypto.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/crypto.c b/crypto.c
index 1187ad7..f415abd 100644
--- a/crypto.c
+++ b/crypto.c
@@ -49,6 +49,7 @@ notmuch_crypto_context_t *
 notmuch_crypto_get_context (notmuch_crypto_t *crypto, const char *protocol)
 {
     notmuch_crypto_context_t *cryptoctx = NULL;
+    size_t i;
 
     if (! protocol) {
 	fprintf (stderr, "Cryptographic protocol is empty.\n");
@@ -61,14 +62,14 @@ notmuch_crypto_get_context (notmuch_crypto_t *crypto, const char *protocol)
      * parameter names as defined in this document are
      * case-insensitive."  Thus, we use strcasecmp for the protocol.
      */
-    if (strcasecmp (protocol, "application/pgp-signature") == 0 ||
-	strcasecmp (protocol, "application/pgp-encrypted") == 0) {
-	cryptoctx = create_gpg_context (crypto);
-    } else {
-	fprintf (stderr, "Unknown or unsupported cryptographic protocol.\n");
+    for (i = 0; i < ARRAY_SIZE (protocols); i++) {
+	if (strcasecmp (protocol, protocols[i].protocol) == 0)
+	    return protocols[i].get_context (crypto);
     }
 
-    return cryptoctx;
+    fprintf (stderr, "Unknown or unsupported cryptographic protocol.\n");
+
+    return NULL;
 }
 
 int
-- 
2.5.0