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[PATCH v3 01/49] builtin/apply: make gitdiff_verify_name() return void

From
Christian Couder <christian.couder@gmail.com>
Date
May 24, 2016, 08:10 UTC
Message-ID
<20160524081126.16973-2-chriscool@tuxfamily.org>
In-Reply-To
<20160524081126.16973-1-chriscool@tuxfamily.org>

As the value returned by gitdiff_verify_name() is put into the same variable that is passed as a parameter to this function, it is simpler to pass the address of the variable and have gitdiff_verify_name() change the variable itself.

This also makes it possible to later have this function return -1 instead of die()ing in case of error.

Reviewed-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
---
 builtin/apply.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)
diff --git a/builtin/apply.c b/builtin/apply.c
index 8e4da2e..fe5aebd 100644
--- a/builtin/apply.c
+++ b/builtin/apply.c
@@ -925,43 +925,43 @@ static int gitdiff_hdrend(const char *line, struct patch *patch)
 #define DIFF_OLD_NAME 0
 #define DIFF_NEW_NAME 1
 
-static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, int side)
+static void gitdiff_verify_name(const char *line, int isnull, char **name, int side)
 {
-	if (!orig_name && !isnull)
-		return find_name(line, NULL, p_value, TERM_TAB);
+	if (!*name && !isnull) {
+		*name = find_name(line, NULL, p_value, TERM_TAB);
+		return;
+	}
 
-	if (orig_name) {
-		int len = strlen(orig_name);
+	if (*name) {
+		int len = strlen(*name);
 		char *another;
 		if (isnull)
 			die(_("git apply: bad git-diff - expected /dev/null, got %s on line %d"),
-			    orig_name, linenr);
+			    *name, linenr);
 		another = find_name(line, NULL, p_value, TERM_TAB);
-		if (!another || memcmp(another, orig_name, len + 1))
+		if (!another || memcmp(another, *name, len + 1))
 			die((side == DIFF_NEW_NAME) ?
 			    _("git apply: bad git-diff - inconsistent new filename on line %d") :
 			    _("git apply: bad git-diff - inconsistent old filename on line %d"), linenr);
 		free(another);
-		return orig_name;
 	} else {
 		/* expect "/dev/null" */
 		if (memcmp("/dev/null", line, 9) || line[9] != '\n')
 			die(_("git apply: bad git-diff - expected /dev/null on line %d"), linenr);
-		return NULL;
 	}
 }
 
 static int gitdiff_oldname(const char *line, struct patch *patch)
 {
-	patch->old_name = gitdiff_verify_name(line, patch->is_new, patch->old_name,
-					      DIFF_OLD_NAME);
+	gitdiff_verify_name(line, patch->is_new, &patch->old_name,
+			    DIFF_OLD_NAME);
 	return 0;
 }
 
 static int gitdiff_newname(const char *line, struct patch *patch)
 {
-	patch->new_name = gitdiff_verify_name(line, patch->is_delete, patch->new_name,
-					      DIFF_NEW_NAME);
+	gitdiff_verify_name(line, patch->is_delete, &patch->new_name,
+			    DIFF_NEW_NAME);
 	return 0;
 }
 
-- 
2.8.3.443.gaeee61e
Previous: Christian CouderNext: Christian Couder
Message 2 of 53 in “libify apply and use lib in am, part 1”
  1. 00/49 libify apply and use lib in am, part 1Christian Couder, May 24, 2016
  2. 01/49 builtin/apply: make gitdiff_verify_name() return voidChristian Couder, May 24, 2016
  3. 02/49 builtin/apply: avoid parameter shadowing 'p_value' globalChristian Couder, May 24, 2016
  4. 03/49 builtin/apply: avoid parameter shadowing 'linenr' globalChristian Couder, May 24, 2016
  5. 04/49 builtin/apply: avoid local variable shadowing 'len' parameterChristian Couder, May 24, 2016
  6. 05/49 builtin/apply: extract line_by_line_fuzzy_match() from match_fragment()Christian Couder, May 24, 2016
  7. 06/49 builtin/apply: move 'options' variable into cmd_apply()Christian Couder, May 24, 2016
  8. 07/49 builtin/apply: move 'read_stdin' global into cmd_apply()Christian Couder, May 24, 2016
  9. 08/49 builtin/apply: introduce 'struct apply_state' to start libifyingChristian Couder, May 24, 2016
  10. 09/49 builtin/apply: move 'state' init into init_apply_state()Christian Couder, May 24, 2016
  11. 10/49 builtin/apply: move 'unidiff_zero' global into 'struct apply_state'Christian Couder, May 24, 2016
  12. 11/49 builtin/apply: move 'check' global into 'struct apply_state'Christian Couder, May 24, 2016
  13. 12/49 builtin/apply: move 'check_index' global into 'struct apply_state'Christian Couder, May 24, 2016
  14. 13/49 builtin/apply: move 'apply_in_reverse' global into 'struct apply_state'Christian Couder, May 24, 2016
  15. 14/49 builtin/apply: move 'apply_with_reject' global into 'struct apply_state'Christian Couder, May 24, 2016
  16. 15/49 builtin/apply: move 'apply_verbosely' global into 'struct apply_state'Christian Couder, May 24, 2016
  17. 16/49 builtin/apply: move 'update_index' global into 'struct apply_state'Christian Couder, May 24, 2016
  18. 17/49 builtin/apply: move 'allow_overlap' global into 'struct apply_state'Christian Couder, May 24, 2016
  19. 18/49 builtin/apply: move 'cached' global into 'struct apply_state'Christian Couder, May 24, 2016
  20. 19/49 builtin/apply: move 'diffstat' global into 'struct apply_state'Christian Couder, May 24, 2016
  21. 20/49 builtin/apply: move 'numstat' global into 'struct apply_state'Christian Couder, May 24, 2016
  22. 21/49 builtin/apply: move 'summary' global into 'struct apply_state'Christian Couder, May 24, 2016
  23. 22/49 builtin/apply: move 'threeway' global into 'struct apply_state'Christian Couder, May 24, 2016
  24. 23/49 builtin/apply: move 'no_add' global into 'struct apply_state'Christian Couder, May 24, 2016
  25. 24/49 builtin/apply: move 'unsafe_paths' global into 'struct apply_state'Christian Couder, May 24, 2016
  26. 25/49 builtin/apply: move 'line_termination' global into 'struct apply_state'Christian Couder, May 24, 2016
  27. 26/49 builtin/apply: move 'fake_ancestor' global into 'struct apply_state'Christian Couder, May 24, 2016
  28. 27/49 builtin/apply: move 'p_context' global into 'struct apply_state'Christian Couder, May 24, 2016
  29. 28/49 builtin/apply: move 'apply' global into 'struct apply_state'Christian Couder, May 24, 2016
  30. 29/49 builtin/apply: move 'patch_input_file' global into 'struct apply_state'Christian Couder, May 24, 2016
  31. 30/49 builtin/apply: move 'limit_by_name' global into 'struct apply_state'Christian Couder, May 24, 2016
  32. 31/49 builtin/apply: move 'has_include' global into 'struct apply_state'Christian Couder, May 24, 2016
  33. 32/49 builtin/apply: move 'p_value' global into 'struct apply_state'Christian Couder, May 24, 2016
  34. 33/49 builtin/apply: move 'p_value_known' global into 'struct apply_state'Christian Couder, May 24, 2016
  35. 34/49 builtin/apply: move 'root' global into 'struct apply_state'Christian Couder, May 24, 2016
  36. 35/49 builtin/apply: move 'whitespace_error' global into 'struct apply_state'Christian Couder, May 24, 2016
  37. 36/49 builtin/apply: move 'whitespace_option' into 'struct apply_state'Christian Couder, May 24, 2016
  38. 37/49 builtin/apply: remove whitespace_option arg from set_default_whitespace_mode()Christian Couder, May 24, 2016
  39. 38/49 builtin/apply: move 'squelch_whitespace_errors' into 'struct apply_state'Christian Couder, May 24, 2016
  40. 39/49 builtin/apply: move 'applied_after_fixing_ws' into 'struct apply_state'Christian Couder, May 24, 2016
  41. 40/49 builtin/apply: move 'ws_error_action' into 'struct apply_state'Christian Couder, May 24, 2016
  42. 41/49 builtin/apply: move 'ws_ignore_action' into 'struct apply_state'Christian Couder, May 24, 2016
  43. 42/49 builtin/apply: move 'max_change' and 'max_len' into 'struct apply_state'Christian Couder, May 24, 2016
  44. 43/49 builtin/apply: move 'state_linenr' global into 'struct apply_state'Christian Couder, May 24, 2016
  45. 44/49 builtin/apply: move 'fn_table' global into 'struct apply_state'Christian Couder, May 24, 2016
  46. 45/49 builtin/apply: move 'symlink_changes' global into 'struct apply_state'Christian Couder, May 24, 2016
  47. 46/49 builtin/apply: move 'state' check into check_apply_state()Christian Couder, May 24, 2016
  48. 47/49 builtin/apply: move applying patches into apply_all_patches()Christian Couder, May 24, 2016
  49. 48/49 builtin/apply: move 'lock_file' global into 'struct apply_state'Christian Couder, May 24, 2016
  50. Junio C HamanoJun 1, 2016
  51. Christian CouderJun 3, 2016
  52. 49/49 builtin/apply: move 'newfd' global into 'struct apply_state'Christian Couder, May 24, 2016
  53. Christian CouderMay 24, 2016

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