upload-pack: minor clean-up in multi-ack logic

No changes to what it does, but separating the codepath clearly
with if ... else if ... chain makes it easier to follow.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/upload-pack.c b/upload-pack.c
index bbd6bd60b52d806be0a69324009755f49b070082..35c7ecb7b4efabc700dc22bfe76617be1ea38b4a 100644 (file)
--- a/upload-pack.c
+++ b/upload-pack.c
@@ -351,7 +351,8 @@ static int got_sha1(char *hex, unsigned char *sha1)
 static int get_common_commits(void)
 {
        static char line[1000];
-       unsigned char sha1[20], last_sha1[20];
+       unsigned char sha1[20];
+       char hex[41], last_hex[41];
        int len;
 
        track_object_refs = 0;
@@ -368,21 +369,22 @@ static int get_common_commits(void)
                }
                len = strip(line, len);
                if (!strncmp(line, "have ", 5)) {
-                       if (got_sha1(line+5, sha1) &&
-                           (multi_ack || have_obj.nr == 1)) {
-                               packet_write(1, "ACK %s%s\n",
-                                            sha1_to_hex(sha1),
-                                            multi_ack ?  " continue" : "");
-                               if (multi_ack)
-                                       memcpy(last_sha1, sha1, 20);
+                       if (got_sha1(line+5, sha1)) {
+                               memcpy(hex, sha1_to_hex(sha1), 41);
+                               if (multi_ack) {
+                                       const char *msg = "ACK %s continue\n";
+                                       packet_write(1, msg, hex);
+                                       memcpy(last_hex, hex, 41);
+                               }
+                               else if (have_obj.nr == 1)
+                                       packet_write(1, "ACK %s\n", hex);
                        }
                        continue;
                }
                if (!strcmp(line, "done")) {
                        if (have_obj.nr > 0) {
                                if (multi_ack)
-                                       packet_write(1, "ACK %s\n",
-                                                       sha1_to_hex(last_sha1));
+                                       packet_write(1, "ACK %s\n", last_hex);
                                return 0;
                        }
                        packet_write(1, "NAK\n");