[PATCH v6 02/23] receive-pack: parse feature request a bit earlier

[Junio C Hamano <gitster@pobox.com>]

Ideally, we should have also allowed the first "shallow" to carry
the feature request trailer, but that is water under the bridge
now.  This makes the next step to factor out the queuing of commands
easier to review.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 Unchanged since v5.

 builtin/receive-pack.c | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index 1663beb..a91eec8 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -840,7 +840,7 @@ static struct command *read_head_info(struct sha1_array *shallow)
 		unsigned char old_sha1[20], new_sha1[20];
 		struct command *cmd;
 		char *refname;
-		int len, reflen;
+		int len, reflen, linelen;
 
 		line = packet_read_line(0, &len);
 		if (!line)
@@ -853,7 +853,18 @@ static struct command *read_head_info(struct sha1_array *shallow)
 			continue;
 		}
 
-		if (len < 83 ||
+		linelen = strlen(line);
+		if (linelen < len) {
+			const char *feature_list = line + linelen + 1;
+			if (parse_feature_request(feature_list, "report-status"))
+				report_status = 1;
+			if (parse_feature_request(feature_list, "side-band-64k"))
+				use_sideband = LARGE_PACKET_MAX;
+			if (parse_feature_request(feature_list, "quiet"))
+				quiet = 1;
+		}
+
+		if (linelen < 83 ||
 		    line[40] != ' ' ||
 		    line[81] != ' ' ||
 		    get_sha1_hex(line, old_sha1) ||
@@ -862,16 +873,7 @@ static struct command *read_head_info(struct sha1_array *shallow)
 			    line);
 
 		refname = line + 82;
-		reflen = strlen(refname);
-		if (reflen + 82 < len) {
-			const char *feature_list = refname + reflen + 1;
-			if (parse_feature_request(feature_list, "report-status"))
-				report_status = 1;
-			if (parse_feature_request(feature_list, "side-band-64k"))
-				use_sideband = LARGE_PACKET_MAX;
-			if (parse_feature_request(feature_list, "quiet"))
-				quiet = 1;
-		}
+		reflen = linelen - 82;
 		cmd = xcalloc(1, sizeof(struct command) + reflen + 1);
 		hashcpy(cmd->old_sha1, old_sha1);
 		hashcpy(cmd->new_sha1, new_sha1);
-- 
2.1.0-403-g099cf47