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Re: [PATCH 3/3] show-branch: use skip_prefix to drop magic numbers

From
Pranit Bauva <pranit.bauva@gmail.com>
Date
Feb 14, 2017, 18:53 UTC
Message-ID
<CAFZEwPOYGRGd5PWSfLRd6vMs35TT1ZzUSfr79fwRA4VzVjAWXA@mail.gmail.com>
In-Reply-To
<20170214172829.6w3cnnqy6ozxl424@sigill.intra.peff.net>
Hey Peff,
On Tue, Feb 14, 2017 at 10:58 PM, Jeff King <peff@peff.net> wrote:
Show 47 quoted lines
> We make several starts_with() calls, only to advance
> pointers. This is exactly what skip_prefix() is for, which
> lets us avoid manually-counted magic numbers.
>
> Signed-off-by: Jeff King <peff@peff.net>
> ---
>  builtin/show-branch.c | 16 +++++++---------
>  1 file changed, 7 insertions(+), 9 deletions(-)
>
> diff --git a/builtin/show-branch.c b/builtin/show-branch.c
> index 404c4d09a..c03d3ec7c 100644
> --- a/builtin/show-branch.c
> +++ b/builtin/show-branch.c
> @@ -470,17 +470,14 @@ static void snarf_refs(int head, int remotes)
>         }
>  }
>
> -static int rev_is_head(char *head, char *name,
> +static int rev_is_head(const char *head, const char *name,
>                        unsigned char *head_sha1, unsigned char *sha1)
>  {
>         if (!head || (head_sha1 && sha1 && hashcmp(head_sha1, sha1)))
>                 return 0;
> -       if (starts_with(head, "refs/heads/"))
> -               head += 11;
> -       if (starts_with(name, "refs/heads/"))
> -               name += 11;
> -       else if (starts_with(name, "heads/"))
> -               name += 6;
> +       skip_prefix(head, "refs/heads/", &head);
> +       if (!skip_prefix(name, "refs/heads/", &name))
> +               skip_prefix(name, "heads/", &name);
>         return !strcmp(head, name);
>  }
>
> @@ -799,8 +796,9 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
>                                 has_head++;
>                 }
>                 if (!has_head) {
> -                       int offset = starts_with(head, "refs/heads/") ? 11 : 0;
> -                       append_one_rev(head + offset);
> +                       const char *name = head;
> +                       skip_prefix(name, "refs/heads/", &name);
> +                       append_one_rev(name);
>                 }
>         }
>

Did you purposely miss the one in line number 278 of builtin/show-branch.c because I think you only touched up the parts which were related to "refs/" but didn't explicitly mention it in the commit message?

    if (starts_with(pretty_str, "[PATCH] "))
        pretty_str += 8;

If not, you can squash this patch attached. Sorry, couldn't send it in mail because of proxy issues.

Regards, Pranit Bauva

From 2e80d4458df659765011450621ee34459dc749f9 Mon Sep 17 00:00:00 2001
From: Pranit Bauva <pranit.bauva@gmail.com>
Date: Tue, 14 Feb 2017 23:53:36 +0530
Subject: [PATCH] !squash: show-branch: use skip_prefix to drop magic numbers
Signed-off-by: Pranit Bauva <pranit.bauva@gmail.com>
---
 builtin/show-branch.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/builtin/show-branch.c b/builtin/show-branch.c
index c03d3ec7c..19756595d 100644
--- a/builtin/show-branch.c
+++ b/builtin/show-branch.c
@@ -275,8 +275,7 @@ static void show_one_commit(struct commit *commit, int no_name)
 		pp_commit_easy(CMIT_FMT_ONELINE, commit, &pretty);
 		pretty_str = pretty.buf;
 	}
-	if (starts_with(pretty_str, "[PATCH] "))
-		pretty_str += 8;
+	skip_prefix(pretty_str, "[PATCH] ", &pretty_str);
 
 	if (!no_name) {
 		if (name && name->head_name) {
-- 
2.11.0
Previous: Jeff KingNext: Jeff King
Message 6 of 15 in “show-branch: fix crash with long ref name”
  1. show-branch: fix crash with long ref nameChristian Couder, Feb 14, 2017
  2. Jeff KingFeb 14, 2017
  3. 1/3 show-branch: drop head_len variableJeff King, Feb 14, 2017
  4. 2/3 show-branch: store resolved head in heap bufferJeff King, Feb 14, 2017
  5. 3/3 show-branch: use skip_prefix to drop magic numbersJeff King, Feb 14, 2017
  6. Pranit BauvaFeb 14, 2017
  7. Jeff KingFeb 14, 2017
  8. Junio C HamanoFeb 14, 2017
  9. Jeff KingFeb 14, 2017
  10. Christian CouderFeb 14, 2017
  11. Jeff KingFeb 15, 2017
  12. Junio C HamanoFeb 15, 2017
  13. Jeff KingFeb 15, 2017
  14. Christian CouderFeb 16, 2017
  15. Jeff KingFeb 17, 2017

Read the whole thread, see it on lore, or plain text.

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