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[PATCH 11/16] daemon: use skip_prefix to avoid magic numbers

From
Jeff King <peff@peff.net>
Date
Jun 18, 2014, 19:49 UTC
Message-ID
<20140618194944.GK22622@sigill.intra.peff.net>
In-Reply-To
<20140618194117.GA22269@sigill.intra.peff.net>

Like earlier cases, we can use skip_prefix to avoid magic numbers that must match the length of starts_with prefixes. However, the numbers are a little more complicated here, as we keep parsing past the prefix. We can solve it by keeping a running pointer as we parse; its final value is the location we want.

Signed-off-by: Jeff King <peff@peff.net>
---
 daemon.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/daemon.c b/daemon.c
index 6d25828..1eb6631 100644
--- a/daemon.c
+++ b/daemon.c
@@ -626,15 +626,16 @@ static int execute(void)
 
 	for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
 		struct daemon_service *s = &(daemon_service[i]);
-		int namelen = strlen(s->name);
-		if (starts_with(line, "git-") &&
-		    !strncmp(s->name, line + 4, namelen) &&
-		    line[namelen + 4] == ' ') {
+		const char *arg;
+
+		if (skip_prefix(line, "git-", &arg) &&
+		    skip_prefix(arg, s->name, &arg) &&
+		    *arg++ == ' ') {
 			/*
 			 * Note: The directory here is probably context sensitive,
 			 * and might depend on the actual service being performed.
 			 */
-			return run_service(line + namelen + 5, s);
+			return run_service(arg, s);
 		}
 	}
 
-- 
2.0.0.566.gfe3e6b2
Previous: Eric SunshineNext: Jeff King
Message 24 of 33 in “skip_prefix refactoring and cleanups”
  1. 0/16 skip_prefix refactoring and cleanupsJeff King, Jun 18, 2014
  2. 01/16 parse_diff_color_slot: drop ofs parameterJeff King, Jun 18, 2014
  3. 02/16 daemon: mark some strings as constJeff King, Jun 18, 2014
  4. 03/16 avoid using skip_prefix as a booleanJeff King, Jun 18, 2014
  5. 04/16 refactor skip_prefix to return a booleanJeff King, Jun 18, 2014
  6. Eric SunshineJun 20, 2014
  7. Jeff KingJun 20, 2014
  8. Eric SunshineJun 20, 2014
  9. Jeff KingJun 20, 2014
  10. Junio C HamanoJun 23, 2014
  11. Jeff KingJun 23, 2014
  12. builtin/clone.c: detect a clone starting at a tag correctlyJunio C Hamano, Jun 23, 2014
  13. 05/16 apply: use skip_prefix instead of raw additionJeff King, Jun 18, 2014
  14. 06/16 fast-import: fix read of uninitialized argv memoryJeff King, Jun 18, 2014
  15. 07/16 transport-helper: avoid reading past end-of-stringJeff King, Jun 18, 2014
  16. 08/16 use skip_prefix to avoid magic numbersJeff King, Jun 18, 2014
  17. Junio C HamanoJun 23, 2014
  18. Jeff KingJul 1, 2014
  19. 09/16 use skip_prefix to avoid repeating stringsJeff King, Jun 18, 2014
  20. 10/16 fast-import: use skip_prefix for parsing inputJeff King, Jun 18, 2014
  21. Eric SunshineJun 20, 2014
  22. Jeff KingJun 20, 2014
  23. Eric SunshineJun 20, 2014
  24. 11/16 daemon: use skip_prefix to avoid magic numbersJeff King, Jun 18, 2014
  25. 12/16 stat_opt: check extra strlen callJeff King, Jun 18, 2014
  26. 13/16 fast-import: refactor parsing of spacesJeff King, Jun 18, 2014
  27. 14/16 fetch-pack: refactor parsing in get_ackJeff King, Jun 18, 2014
  28. Eric SunshineJun 20, 2014
  29. 15/16 git: avoid magic number with skip_prefixJeff King, Jun 18, 2014
  30. 16/16 use skip_prefix to avoid repeated calculationsJeff King, Jun 18, 2014
  31. Tanay AbhraJun 19, 2014
  32. 17/16 http-push: refactor parsing of remote object namesJeff King, Jun 19, 2014
  33. Jeff KingJun 19, 2014

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