[PATCH v2] Use ^=1 to toggle between 0 and 1

["AreaZR via GitGitGadget" <gitgitgadget@gmail.com>]

From: Seija Kijin <doremylover123@gmail.com>

If it is known that an int is either 1 or 0,
doing an exclusive or to switch instead of a
modulus makes more sense and is more efficient.

Signed-off-by: Seija <doremylover123@gmail.com>
---
    Use ^=1 to toggle between 0 and 1
    
    If it is known that an int is either 1 or 0, doing an exclusive or to
    switch instead of a modulus makes more sense and is more efficient.
    
    Signed-off-by: Seija Kijin doremylover123@gmail.com

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1620%2FAreaZR%2Fbuffer-v2
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1620/AreaZR/buffer-v2
Pull-Request: https://github.com/git/git/pull/1620

Range-diff vs v1:

 1:  1bdc62e1b19 ! 1:  5819a51526b Use ^=1 to toggle between 0 and 1
     @@ Commit message
          doing an exclusive or to switch instead of a
          modulus makes more sense and is more efficient.
      
     -    Signed-off-by: Seija Kijin doremylover123@gmail.com
     -
     - ## builtin/fast-export.c ##
     -@@ builtin/fast-export.c: static void anonymize_ident_line(const char **beg, const char **end)
     - 	struct ident_split split;
     - 	const char *end_of_header;
     - 
     --	out = &buffers[which_buffer++];
     --	which_buffer %= ARRAY_SIZE(buffers);
     -+	out = &buffers[which_buffer];
     -+	which_buffer ^= 1;
     - 	strbuf_reset(out);
     - 
     - 	/* skip "committer", "author", "tagger", etc */
     +    Signed-off-by: Seija <doremylover123@gmail.com>
      
       ## diff.c ##
      @@ diff.c: static void mark_color_as_moved(struct diff_options *o,
     @@ diff.c: static void mark_color_as_moved(struct diff_options *o,
       				flipped_block = 0;
       
      
     - ## ident.c ##
     -@@ ident.c: const char *fmt_ident(const char *name, const char *email,
     - 	int want_name = !(flag & IDENT_NO_NAME);
     - 
     - 	struct strbuf *ident = &ident_pool[index];
     --	index = (index + 1) % ARRAY_SIZE(ident_pool);
     -+	index ^= 1;
     - 
     - 	if (!email) {
     - 		if (whose_ident == WANT_AUTHOR_IDENT && git_author_email.len)
     -
       ## t/helper/test-path-utils.c ##
      @@ t/helper/test-path-utils.c: static int check_dotfile(const char *x, const char **argv,
       	int res = 0, expect = 1;


 diff.c                     | 2 +-
 t/helper/test-path-utils.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/diff.c b/diff.c
index 266ddf18e73..5c2ac8d6fd1 100644
--- a/diff.c
+++ b/diff.c
@@ -1231,7 +1231,7 @@ static void mark_color_as_moved(struct diff_options *o,
 							    &pmb_nr);
 
 			if (contiguous && pmb_nr && moved_symbol == l->s)
-				flipped_block = (flipped_block + 1) % 2;
+				flipped_block ^= 1;
 			else
 				flipped_block = 0;
 
diff --git a/t/helper/test-path-utils.c b/t/helper/test-path-utils.c
index 3129aa28fd2..0810647c722 100644
--- a/t/helper/test-path-utils.c
+++ b/t/helper/test-path-utils.c
@@ -188,7 +188,7 @@ static int check_dotfile(const char *x, const char **argv,
 	int res = 0, expect = 1;
 	for (; *argv; argv++) {
 		if (!strcmp("--not", *argv))
-			expect = !expect;
+			expect ^= 1;
 		else if (expect != (is_hfs(*argv) || is_ntfs(*argv)))
 			res = error("'%s' is %s.git%s", *argv,
 				    expect ? "not " : "", x);

base-commit: 2ccc89b0c16c51561da90d21cfbb4b58cc877bf6
-- 
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