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Re: [PATCH 02/10] diff: emit_{add, del, context}_line to increase {pre,post}image line count

From
Junio C Hamano <gitster@pobox.com>
Date
Sep 12, 2016, 23:47 UTC
Message-ID
<xmqq60q0y93e.fsf@gitster.mtv.corp.google.com>
In-Reply-To
<1473572530-25764-3-git-send-email-stefanbeller@gmail.com>
Stefan Beller <stefanbeller@gmail.com> writes:
Show 10 quoted lines
> From: Stefan Beller <sbeller@google.com>
>
> At all call sites of emit_{add, del, context}_line we increment the line
> count, so move it into the respective functions to make the code at the
> calling site a bit clearer.
>
> Signed-off-by: Stefan Beller <sbeller@google.com>
> ---
>  diff.c | 15 ++++++---------
>  1 file changed, 6 insertions(+), 9 deletions(-)

I am mostly in favor of this change, as the calls to these three functions are always preceded by increment of these fields, but it is "mostly" exactly because the reverse is not true. Namely ...

Show 17 quoted lines
> @@ -1293,16 +1294,12 @@ static void fn_out_consume(void *priv, char *line, unsigned long len)
>  
>  	switch (line[0]) {
>  	case '+':
> -		ecbdata->lno_in_postimage++;
>  		emit_add_line(reset, ecbdata, line + 1, len - 1);
>  		break;
>  	case '-':
> -		ecbdata->lno_in_preimage++;
>  		emit_del_line(reset, ecbdata, line + 1, len - 1);
>  		break;
>  	case ' ':
> -		ecbdata->lno_in_postimage++;
> -		ecbdata->lno_in_preimage++;
>  		emit_context_line(reset, ecbdata, line + 1, len - 1);
>  		break;
>  	default:

... there still needs an increment in the context lines, not shown in the patch, just after this "default:". I think the patch is OK as the comment after this "default:" (also not shown in the patch) makes it clear what is going on.

Thanks.
Previous: Stefan BellerNext: Stefan Beller
Message 5 of 21 in “Another preparatory series for rename detection”
  1. 00/10 Another preparatory series for rename detectionStefan Beller, Sep 11, 2016
  2. 01/10 diff: move line ending check into emit_hunk_headerStefan Beller, Sep 11, 2016
  3. Junio C HamanoSep 12, 2016
  4. 02/10 diff: emit_{add, del, context}_line to increase {pre,post}image line countStefan Beller, Sep 11, 2016
  5. Junio C HamanoSep 12, 2016
  6. 03/10 diff.c: drop tautologous condition in emit_line_0Stefan Beller, Sep 11, 2016
  7. Junio C HamanoSep 12, 2016
  8. Stefan BellerSep 16, 2016
  9. 05/10 diff.c: reintroduce diff_flush_patch for all filesStefan Beller, Sep 11, 2016
  10. Junio C HamanoSep 13, 2016
  11. 04/10 diff.c: rename diff_flush_patch to diff_flush_patch_filepairStefan Beller, Sep 11, 2016
  12. Junio C HamanoSep 12, 2016
  13. 07/10 diff.c: convert fn_out_consume to use emit_line_*Stefan Beller, Sep 11, 2016
  14. Junio C HamanoSep 13, 2016
  15. Stefan BellerSep 13, 2016
  16. 10/10 submodule.c: convert show_submodule_summary to use emit_line_fmtStefan Beller, Sep 11, 2016
  17. 09/10 diff.c: convert emit_rewrite_lines to use emit_line_0Stefan Beller, Sep 11, 2016
  18. 08/10 diff.c: convert emit_rewrite_diff to use emit_line_*Stefan Beller, Sep 11, 2016
  19. 06/10 diff.c: emit_line_0 can handle no colorStefan Beller, Sep 11, 2016
  20. Junio C HamanoSep 13, 2016
  21. Stefan BellerSep 13, 2016

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