From: Stefan Beller <sbeller@google.com>
To: Junio C Hamano <gitster@pobox.com>
Cc: "git@vger.kernel.org" <git@vger.kernel.org>,
Simon Ruderich <simon@ruderich.org>
Subject: Re: [PATCHv2 22/25] diff.c: color moved lines differently
Date: Fri, 30 Jun 2017 14:21:03 -0700 [thread overview]
Message-ID: <CAGZ79kbD13RgcTuiegn4J1piFZrNu6bAxCGEKDYLThnVuYQLrg@mail.gmail.com> (raw)
In-Reply-To: <xmqq1sq1qiyg.fsf@gitster.mtv.corp.google.com>
On Fri, Jun 30, 2017 at 2:11 PM, Junio C Hamano <gitster@pobox.com> wrote:
>> + return (int)' ';
>
> Do we need a cast here?
No, I figured it is good to have it here explicitly, though.
We can drop that if you have strong preferences one way or another.
>
>> +static unsigned get_string_hash(struct emitted_diff_symbol *es, struct diff_options *o)
>> +{
>> + if (o->xdl_opts & XDF_WHITESPACE_FLAGS) {
>> + static struct strbuf sb = STRBUF_INIT;
>> + const char *ap = es->line, *ae = es->line + es->len;
>> + int c;
>> +
>> + strbuf_reset(&sb);
>> + while (ae > ap && isspace(*ae))
>> + ae--;
>
> Not testing for the AT_EOL option here?
No, because the other options are stronger than the AT_EOL,
such that as you note it is still correct.
If in the future, we'd have another new option e.g.
IGNORE_TAB_BLANK_CONVERSION_BUT_WARN_ON_LENGTH_DIFF
(useful for python programmers ;)
this would break.
>
> By the way, this is an unrelated tangent because I think you
> inherited this pattern by copying and pasting from elsewhere, but I
> think it would be better if we avoid casting the function pointer
> type like this:
>
>> + if (o->color_moved) {
>> + struct hashmap add_lines, del_lines;
>> +
>> + hashmap_init(&del_lines,
>> + (hashmap_cmp_fn)moved_entry_cmp, o, 0);
>> + hashmap_init(&add_lines,
>> + (hashmap_cmp_fn)moved_entry_cmp, o, 0);
>
> When hashmap_cmp_fn's definition changes, these two calling sites
> won't be caught as passing a incorrectly typed callback function by
> the compiler.
>
> Instead, we can match the actual implementation of the callback
> function, e.g.
>
>> +static int moved_entry_cmp(const struct diff_options *diffopt,
>> + const struct moved_entry *a,
>> + const struct moved_entry *b,
>> + const void *keydata)
>> +{
>
> to the expected function type, i.e.
>
> static int moved_entry_cmp(const void *fndata,
> const void *entry, const void *entry_or_key,
> const void *keydata)
> {
> const struct diff_options *diffopt = fndata;
> const struct moved_entry *a = entry;
> const struct moved_entry *b = entry_or_key;
> ...
>
> by casting the parameters.
I agree. I can make a cleanup throughout the whole code base,
but I would prefer if that is done in a separate series, as this
is already slightly lengthy.
Thanks,
Stefan
next prev parent reply other threads:[~2017-06-30 21:21 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-30 0:06 [PATCH 00/25] Reroll of sb/diff-color-moved Stefan Beller
2017-06-30 0:06 ` [PATCH 01/25] diff.c: readability fix Stefan Beller
2017-06-30 0:06 ` [PATCH 02/25] diff.c: move line ending check into emit_hunk_header Stefan Beller
2017-06-30 0:06 ` [PATCH 03/25] diff.c: factor out diff_flush_patch_all_file_pairs Stefan Beller
2017-06-30 0:06 ` [PATCH 04/25] diff.c: introduce emit_diff_symbol Stefan Beller
2017-06-30 0:06 ` [PATCH 05/25] diff.c: emit_diff_symbol learns DIFF_SYMBOL_CONTEXT_MARKER Stefan Beller
2017-06-30 0:06 ` [PATCH 06/25] diff.c: emit_diff_symbol learns DIFF_SYMBOL_CONTEXT_FRAGINFO Stefan Beller
2017-06-30 0:06 ` [PATCH 07/25] diff.c: emit_diff_symbol learns DIFF_SYMBOL_NO_LF_EOF Stefan Beller
2017-06-30 0:06 ` [PATCH 08/25] diff.c: migrate emit_line_checked to use emit_diff_symbol Stefan Beller
2017-06-30 0:06 ` [PATCH 09/25] diff.c: emit_diff_symbol learns DIFF_SYMBOL_WORDS[_PORCELAIN] Stefan Beller
2017-06-30 0:06 ` [PATCH 10/25] diff.c: emit_diff_symbol learns DIFF_SYMBOL_CONTEXT_INCOMPLETE Stefan Beller
2017-06-30 0:06 ` [PATCH 11/25] diff.c: emit_diff_symbol learns DIFF_SYMBOL_FILEPAIR_{PLUS, MINUS} Stefan Beller
2017-06-30 0:06 ` [PATCH 12/25] diff.c: emit_diff_symbol learns DIFF_SYMBOL_HEADER Stefan Beller
2017-06-30 0:06 ` [PATCH 13/25] diff.c: emit_diff_symbol learns about DIFF_SYMBOL_BINARY_FILES Stefan Beller
2017-06-30 0:06 ` [PATCH 14/25] diff.c: emit_diff_symbol learns DIFF_SYMBOL_REWRITE_DIFF Stefan Beller
2017-06-30 0:07 ` [PATCH 15/25] submodule.c: migrate diff output to use emit_diff_symbol Stefan Beller
2017-06-30 0:07 ` [PATCH 16/25] diff.c: convert emit_binary_diff_body " Stefan Beller
2017-06-30 0:07 ` [PATCH 17/25] diff.c: convert show_stats " Stefan Beller
2017-06-30 0:07 ` [PATCH 18/25] diff.c: convert word diffing " Stefan Beller
2017-06-30 0:07 ` [PATCH 19/25] diff.c: emit_diff_symbol learns about DIFF_SYMBOL_STAT_SEP Stefan Beller
2017-06-30 0:07 ` [PATCH 20/25] diff.c: emit_diff_symbol learns about DIFF_SYMBOL_SUMMARY Stefan Beller
2017-06-30 0:07 ` [PATCH 21/25] diff.c: buffer all output if asked to Stefan Beller
2017-06-30 0:07 ` [PATCH 22/25] diff.c: color moved lines differently Stefan Beller
2017-06-30 17:54 ` Junio C Hamano
2017-06-30 18:13 ` Stefan Beller
2017-06-30 18:41 ` Junio C Hamano
2017-06-30 0:07 ` [PATCH 23/25] diff.c: color moved lines differently, plain mode Stefan Beller
2017-06-30 0:07 ` [PATCH 24/25] diff.c: add dimming to moved line detection Stefan Beller
2017-06-30 0:07 ` [PATCH 25/25] diff: document the new --color-moved setting Stefan Beller
2017-06-30 7:26 ` Simon Ruderich
2017-06-30 16:04 ` Stefan Beller
2017-06-30 20:31 ` Simon Ruderich
2017-06-30 20:33 ` Stefan Beller
2017-06-30 20:52 ` [PATCHv2 00/25] Reroll of sb/diff-color-moved Stefan Beller
2017-06-30 20:52 ` [PATCHv2 01/25] diff.c: readability fix Stefan Beller
2017-06-30 20:52 ` [PATCHv2 02/25] diff.c: move line ending check into emit_hunk_header Stefan Beller
2017-06-30 20:52 ` [PATCHv2 03/25] diff.c: factor out diff_flush_patch_all_file_pairs Stefan Beller
2017-06-30 20:52 ` [PATCHv2 04/25] diff.c: introduce emit_diff_symbol Stefan Beller
2017-06-30 20:52 ` [PATCHv2 05/25] diff.c: emit_diff_symbol learns DIFF_SYMBOL_CONTEXT_MARKER Stefan Beller
2017-06-30 20:52 ` [PATCHv2 06/25] diff.c: emit_diff_symbol learns DIFF_SYMBOL_CONTEXT_FRAGINFO Stefan Beller
2017-06-30 20:52 ` [PATCHv2 07/25] diff.c: emit_diff_symbol learns DIFF_SYMBOL_NO_LF_EOF Stefan Beller
2017-06-30 20:52 ` [PATCHv2 08/25] diff.c: migrate emit_line_checked to use emit_diff_symbol Stefan Beller
2017-06-30 20:52 ` [PATCHv2 09/25] diff.c: emit_diff_symbol learns DIFF_SYMBOL_WORDS[_PORCELAIN] Stefan Beller
2017-06-30 20:52 ` [PATCHv2 10/25] diff.c: emit_diff_symbol learns DIFF_SYMBOL_CONTEXT_INCOMPLETE Stefan Beller
2017-06-30 20:52 ` [PATCHv2 11/25] diff.c: emit_diff_symbol learns DIFF_SYMBOL_FILEPAIR_{PLUS, MINUS} Stefan Beller
2017-06-30 20:52 ` [PATCHv2 12/25] diff.c: emit_diff_symbol learns DIFF_SYMBOL_HEADER Stefan Beller
2017-06-30 20:52 ` [PATCHv2 13/25] diff.c: emit_diff_symbol learns about DIFF_SYMBOL_BINARY_FILES Stefan Beller
2017-06-30 20:52 ` [PATCHv2 14/25] diff.c: emit_diff_symbol learns DIFF_SYMBOL_REWRITE_DIFF Stefan Beller
2017-06-30 20:53 ` [PATCHv2 15/25] submodule.c: migrate diff output to use emit_diff_symbol Stefan Beller
2017-06-30 20:53 ` [PATCHv2 16/25] diff.c: convert emit_binary_diff_body " Stefan Beller
2017-06-30 20:53 ` [PATCHv2 17/25] diff.c: convert show_stats " Stefan Beller
2017-06-30 20:53 ` [PATCHv2 18/25] diff.c: convert word diffing " Stefan Beller
2017-06-30 20:53 ` [PATCHv2 19/25] diff.c: emit_diff_symbol learns about DIFF_SYMBOL_STAT_SEP Stefan Beller
2017-06-30 20:53 ` [PATCHv2 20/25] diff.c: emit_diff_symbol learns about DIFF_SYMBOL_SUMMARY Stefan Beller
2017-06-30 20:53 ` [PATCHv2 21/25] diff.c: buffer all output if asked to Stefan Beller
2017-06-30 20:53 ` [PATCHv2 22/25] diff.c: color moved lines differently Stefan Beller
2017-06-30 21:11 ` Junio C Hamano
2017-06-30 21:21 ` Stefan Beller [this message]
2017-06-30 21:36 ` Junio C Hamano
2017-06-30 20:53 ` [PATCHv2 23/25] diff.c: color moved lines differently, plain mode Stefan Beller
2017-06-30 20:53 ` [PATCHv2 24/25] diff.c: add dimming to moved line detection Stefan Beller
2017-06-30 20:53 ` [PATCHv2 25/25] diff: document the new --color-moved setting Stefan Beller
2017-06-30 21:49 ` [PATCHv2 00/25] Reroll of sb/diff-color-moved Junio C Hamano
-- strict thread matches above, loose matches on Subject: below --
2017-06-20 2:47 [PATCH 00/26] reroll " Stefan Beller
2017-06-23 1:28 ` [PATCHv2 00/25] " Stefan Beller
2017-06-23 1:29 ` [PATCHv2 22/25] diff.c: color moved lines differently Stefan Beller
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