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From: Johannes Schindelin <Johannes.Schindelin@gmx.de>
To: phillip.wood@dunelm.org.uk
Cc: Alban Gruin <alban.gruin@gmail.com>,
	git@vger.kernel.org, Junio C Hamano <gitster@pobox.com>
Subject: Re: [PATCH v3 06/16] sequencer: refactor sequencer_add_exec_commands() to work on a todo_list
Date: Fri, 30 Nov 2018 20:06:33 +0100 (STD)
Message-ID: <nycvar.QRO.7.76.6.1811302002340.41@tvgsbejvaqbjf.bet> (raw)
In-Reply-To: <0e00acd9-5b09-b712-2e21-550e348ea0df@talktalk.net>

Hi,

On Fri, 30 Nov 2018, Phillip Wood wrote:

> > diff --git a/sequencer.c b/sequencer.c
> > index 900899ef20..11692d0b98 100644
> > --- a/sequencer.c
> > +++ b/sequencer.c
> > @@ -4394,24 +4394,29 @@ int sequencer_make_script(FILE *out, int argc, const
> > char **argv,
> >  	return 0;
> >  }
> >  
> > -/*
> > - * Add commands after pick and (series of) squash/fixup commands
> > - * in the todo list.
> > - */
> > -int sequencer_add_exec_commands(const char *commands)
> > +static void todo_list_add_exec_commands(struct todo_list *todo_list,
> > +					struct string_list *commands)
> > {
> > -	const char *todo_file = rebase_path_todo();
> > -	struct todo_list todo_list = TODO_LIST_INIT;
> > -	struct strbuf *buf = &todo_list.buf;
> > -	size_t offset = 0, commands_len = strlen(commands);
> > -	int i, insert;
> > +	struct strbuf *buf = &todo_list->buf;
> > +	const char *old_buf = buf->buf;
> > +	size_t base_length = buf->len;
> > +	int i, insert, nr = 0, alloc = 0;
> > +	struct todo_item *items = NULL, *base_items = NULL;
> > 
> > -	if (strbuf_read_file(&todo_list.buf, todo_file, 0) < 0)
> > -		return error(_("could not read '%s'."), todo_file);
> > +	for (i = 0; i < commands->nr; ++i) {
> > +		strbuf_addstr(buf, commands->items[i].string);
> > +		strbuf_addch(buf, '\n');
> > +	}
> 
> This could cause buf->buf to be reallocated in which case all the
> todo_list_item.arg pointers will be invalidated.

I guess it is a good time for me to admit that the `arg` idea was not my
best. Maybe it would be good to convert that from a pointer to an offset,
e.g. `size_t arg_offset_in_buf;`? Or maybe we should just drop the
`_in_buf` suffix and clarify in a comment next to the declaration of the
fields that they are offsets in the strbuf?

Ciao,
Dscho

  reply index

Thread overview: 75+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-07 19:54 [PATCH 00/15] sequencer: refactor functions working " Alban Gruin
2018-10-07 19:54 ` [PATCH 01/15] sequencer: clear the number of items of a todo_list before parsing Alban Gruin
2018-10-07 19:54 ` [PATCH 02/15] sequencer: make the todo_list structure public Alban Gruin
2018-10-07 19:54 ` [PATCH 03/15] sequencer: refactor check_todo_list() to work on a todo_list Alban Gruin
2018-10-11 11:23   ` Phillip Wood
2018-10-07 19:54 ` [PATCH 04/15] sequencer: refactor sequencer_add_exec_commands() " Alban Gruin
2018-10-11 11:25   ` Phillip Wood
2018-10-11 16:57     ` Alban Gruin
2018-10-12  9:54       ` Phillip Wood
2018-10-12 12:23         ` Alban Gruin
2018-10-07 19:54 ` [PATCH 05/15] sequencer: refactor rearrange_squash() " Alban Gruin
2018-10-07 19:54 ` [PATCH 06/15] sequencer: refactor transform_todos() " Alban Gruin
2018-10-07 19:54 ` [PATCH 07/15] sequencer: make sequencer_make_script() write its script to a strbuf Alban Gruin
2018-10-12 10:01   ` SZEDER Gábor
2018-10-19  8:16     ` Junio C Hamano
2018-10-19  9:27       ` SZEDER Gábor
2018-10-07 19:54 ` [PATCH 08/15] sequencer: change complete_action() to use the refactored functions Alban Gruin
2018-10-11 13:51   ` Phillip Wood
2018-10-11 17:06     ` Alban Gruin
2018-10-07 19:54 ` [PATCH 09/15] sequencer: refactor skip_unnecessary_picks() to work on a todo_list Alban Gruin
2018-10-07 19:54 ` [PATCH 10/15] rebase-interactive: use todo_list_transform() in edit_todo_list() Alban Gruin
2018-10-11 15:16   ` Phillip Wood
2018-10-11 19:58     ` Alban Gruin
2018-10-07 19:54 ` [PATCH 11/15] rebase-interactive: append_todo_help() changes Alban Gruin
2018-10-07 19:54 ` [PATCH 12/15] rebase-interactive: rewrite edit_todo_list() to handle the initial edit Alban Gruin
2018-10-07 19:54 ` [PATCH 13/15] sequencer: use edit_todo_list() in complete_action() Alban Gruin
2018-10-07 19:54 ` [PATCH 14/15] sequencer: fix a call to error() in transform_todo_file() Alban Gruin
2018-10-07 19:54 ` [PATCH 15/15] rebase--interactive: move transform_todo_file() to rebase--interactive.c Alban Gruin
2018-10-07 20:51 ` [PATCH 00/15] sequencer: refactor functions working on a todo_list Alban Gruin
2018-10-27 21:29 ` [PATCH v2 00/16] " Alban Gruin
2018-10-27 21:29   ` [PATCH v2 01/16] sequencer: changes in parse_insn_buffer() Alban Gruin
2018-10-27 21:29   ` [PATCH v2 02/16] sequencer: make the todo_list structure public Alban Gruin
2018-10-27 21:29   ` [PATCH v2 03/16] sequencer: refactor transform_todos() to work on a todo_list Alban Gruin
2018-10-27 21:29   ` [PATCH v2 04/16] sequencer: introduce todo_list_write_to_file() Alban Gruin
2018-10-30 16:28     ` Phillip Wood
2018-11-01 23:31       ` Alban Gruin
2018-10-27 21:29   ` [PATCH v2 05/16] sequencer: refactor check_todo_list() to work on a todo_list Alban Gruin
2018-10-27 21:29   ` [PATCH v2 06/16] sequencer: refactor sequencer_add_exec_commands() " Alban Gruin
2018-10-30 16:47     ` Phillip Wood
2018-11-01 23:31       ` Alban Gruin
2018-11-02 10:09         ` Phillip Wood
2018-11-02 16:26           ` Alban Gruin
2018-11-02 17:09             ` Phillip Wood
2018-10-27 21:29   ` [PATCH v2 07/16] sequencer: refactor rearrange_squash() " Alban Gruin
2018-10-27 21:29   ` [PATCH v2 08/16] sequencer: make sequencer_make_script() write its script to a strbuf Alban Gruin
2018-10-27 21:29   ` [PATCH v2 09/16] sequencer: change complete_action() to use the refactored functions Alban Gruin
2018-10-27 21:29   ` [PATCH v2 10/16] sequencer: refactor skip_unnecessary_picks() to work on a todo_list Alban Gruin
2018-10-27 21:29   ` [PATCH v2 11/16] rebase-interactive: use todo_list_write_to_file() in edit_todo_list() Alban Gruin
2018-10-27 21:29   ` [PATCH v2 12/16] rebase-interactive: append_todo_help() changes Alban Gruin
2018-10-27 21:29   ` [PATCH v2 13/16] rebase-interactive: rewrite edit_todo_list() to handle the initial edit Alban Gruin
2018-10-27 21:29   ` [PATCH v2 14/16] sequencer: use edit_todo_list() in complete_action() Alban Gruin
2018-10-27 21:29   ` [PATCH v2 15/16] sequencer: fix a call to error() in transform_todo_file() Alban Gruin
2018-10-27 21:29   ` [PATCH v2 16/16] rebase--interactive: move transform_todo_file() to rebase--interactive.c Alban Gruin
2018-10-29  3:05   ` [PATCH v2 00/16] sequencer: refactor functions working on a todo_list Junio C Hamano
2018-10-29 15:34     ` Alban Gruin
2018-11-09  8:07   ` [PATCH v3 " Alban Gruin
2018-11-09  8:07     ` [PATCH v3 01/16] sequencer: changes in parse_insn_buffer() Alban Gruin
2018-11-09  8:07     ` [PATCH v3 02/16] sequencer: make the todo_list structure public Alban Gruin
2018-11-09  8:07     ` [PATCH v3 03/16] sequencer: refactor transform_todos() to work on a todo_list Alban Gruin
2018-11-09  8:07     ` [PATCH v3 04/16] sequencer: introduce todo_list_write_to_file() Alban Gruin
2018-11-09  8:07     ` [PATCH v3 05/16] sequencer: refactor check_todo_list() to work on a todo_list Alban Gruin
2018-11-09  8:07     ` [PATCH v3 06/16] sequencer: refactor sequencer_add_exec_commands() " Alban Gruin
2018-11-30 17:02       ` Phillip Wood
2018-11-30 19:06         ` Johannes Schindelin [this message]
2018-12-10 14:33           ` Phillip Wood
2018-11-09  8:07     ` [PATCH v3 07/16] sequencer: refactor rearrange_squash() " Alban Gruin
2018-11-09  8:07     ` [PATCH v3 08/16] sequencer: make sequencer_make_script() write its script to a strbuf Alban Gruin
2018-11-09  8:07     ` [PATCH v3 09/16] sequencer: change complete_action() to use the refactored functions Alban Gruin
2018-11-09  8:07     ` [PATCH v3 10/16] sequencer: refactor skip_unnecessary_picks() to work on a todo_list Alban Gruin
2018-11-09  8:08     ` [PATCH v3 11/16] rebase-interactive: use todo_list_write_to_file() in edit_todo_list() Alban Gruin
2018-11-09  8:08     ` [PATCH v3 12/16] rebase-interactive: append_todo_help() changes Alban Gruin
2018-11-09  8:08     ` [PATCH v3 13/16] rebase-interactive: rewrite edit_todo_list() to handle the initial edit Alban Gruin
2018-11-09  8:08     ` [PATCH v3 14/16] sequencer: use edit_todo_list() in complete_action() Alban Gruin
2018-11-09  8:08     ` [PATCH v3 15/16] sequencer: fix a call to error() in transform_todo_file() Alban Gruin
2018-11-09  8:08     ` [PATCH v3 16/16] rebase--interactive: move transform_todo_file() to rebase--interactive.c Alban Gruin

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