Re: [PATCH v2 2/2] git-imap-send: Convert LF to CRLF before storing patch to draft box

[Junio C Hamano <gitster@pobox.com>]

Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> writes:

> According to RFC of IMAP, all messages must not have "bare newlines ('\n')".
> '\n' should be converted to "\r\n" before storing messages to IMAP's mailbox.
> This patch implements the converting function to git-imap-send.
>
> Cc: Erik Faye-Lund <kusmabite@googlemail.com>
> Cc: Jakub Narebski <jnareb@gmail.com>
> Cc: Linus Torvalds <torvalds@linux-foundation.org>
> Cc: Jeff King <peff@peff.org>
> Signed-off-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
> ---
>  imap-send.c |   25 +++++++++++++++++++++++++
>  1 files changed, 25 insertions(+), 0 deletions(-)
>
> diff --git a/imap-send.c b/imap-send.c
> index dcd8a2a..dbc72ca 100644
> --- a/imap-send.c
> +++ b/imap-send.c
> @@ -1279,6 +1279,30 @@ static int imap_make_flags(int flags, char *buf)
>  	return d;
>  }
>  
> +static void lf_to_crlf(struct msg_data *msg)
> +{
> +	char *new;
> +	int i, j, lfnum = 0;
> +
> +	for (i = 0; i < msg->len; i++) {
> +		if (msg->data[i] == '\n')
> +			lfnum++;
> +	}
> +	new = xcalloc(msg->len + lfnum, sizeof(char));
> +	for (i = 0, j = 0; i < msg->len; i++) {
> +		if (msg->data[i] != '\n') {
> +			new[j++] = msg->data[i];
> +			continue;
> +		}
> +		new[j++] = '\r';
> +		new[j++] = '\n';
> +	}
> +	msg->len += lfnum;
> +	free(msg->data);
> +	msg->data = new;
> +	msg->crlf = 1;
> +}

Thanks.

Two questions:

 - "msg->crlf" -- what is it used for?  Do we need to maintain it?

 - Can the incoming payload already be CRLF terminated?  If so, do we want
   to convert it into CRCRLF?