* ^M characters
@ 2008-10-22 20:29 Corey Foote
2008-10-22 20:43 ` Parker, Matthew
0 siblings, 1 reply; 6+ messages in thread
From: Corey Foote @ 2008-10-22 20:29 UTC (permalink / raw
To: help-gnu-emacs
[-- Attachment #1: Type: text/plain, Size: 450 bytes --]
I copied some text into an email buffer, but
each line ends with a funny colored character that looks like ^M. What are
these characters? How can I remove them without having to manually delete each
one? And how can I insert one myself?
_________________________________________________________________
Stay organized with simple drag and drop from Windows Live Hotmail.
http://windowslive.com/Explore/hotmail?ocid=TXT_TAGLM_WL_hotmail_102008
[-- Attachment #2: Type: text/html, Size: 697 bytes --]
^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: ^M characters
2008-10-22 20:29 ^M characters Corey Foote
@ 2008-10-22 20:43 ` Parker, Matthew
0 siblings, 0 replies; 6+ messages in thread
From: Parker, Matthew @ 2008-10-22 20:43 UTC (permalink / raw
To: Corey Foote, help-gnu-emacs
Control-Q Control-M will create this character, so will Control-Q and RETURN key...
which you can enter into the buffer to create or into M-x query-replace-regexp to do a search/replace
BTW, control-Q is the quoting command
-----Original Message-----
From: help-gnu-emacs-bounces+mparker=seic.com@gnu.org on behalf of Corey Foote
Sent: Wed 10/22/2008 4:29 PM
To: help-gnu-emacs@gnu.org
Subject: ^M characters
I copied some text into an email buffer, but
each line ends with a funny colored character that looks like ^M. What are
these characters? How can I remove them without having to manually delete each
one? And how can I insert one myself?
_________________________________________________________________
Stay organized with simple drag and drop from Windows Live Hotmail.
http://windowslive.com/Explore/hotmail?ocid=TXT_TAGLM_WL_hotmail_102008
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: ^M characters
[not found] <mailman.1834.1224707393.25473.help-gnu-emacs@gnu.org>
@ 2008-10-22 21:25 ` Xah
2008-10-22 23:32 ` Mike Treseler
0 siblings, 1 reply; 6+ messages in thread
From: Xah @ 2008-10-22 21:25 UTC (permalink / raw
To: help-gnu-emacs
On Oct 22, 1:29 pm, Corey Foote <coreyfo...@hotmail.com> wrote:
> I copied some text into an email buffer, but
> each line ends with a funny colored character that looks like ^M. What are
> these characters? How can I remove them without having to manually delete each
> one? And how can I insert one myself?
^M is a standard notation for the ascii 13 char named Carriage Return.
Today, this notation has fallen out of use, unfamiliar to probably 99%
of professional programers.
For detail, see:
The Confusion of Emacs's Keystroke Representation
http://xahlee.org/emacs/keystroke_rep.html
When you paste some code involving different EOL char, most editor
deal with this by simply converting them to your current EOL. Usually
they have a preference setting to indicate whether you want this to
happen automatically or literal. I think emacs should also adapt this
behavior.
To replace these unprintable chars, you can use any of the emacs's
find/replace command (e.g. “query-replace”), and type Ctrl+q when you
want to input unprintable or un-typable chars. Alternatively, you can
change the buffer's file encoding. See:
Q: How to change file line endings between Mac/Dos/Unix?
A: Open the file, then do “Alt+x set-buffer-file-coding-system” (Ctrl-
x RET f). Give it a value of mac, dos, unix. Then, when you save the
file, it'll be saved with the proper encoding for newlines.
Note: Unixes (including Linuxes and Mac OS X) uses LF (ascii 10; line
feed) for newline. Mac OS Classic uses CR (ascii 13; carriage return)
for newline. (Mac OS X prefers LF but accepts CR too) Windows uses CR
followed by LF ("\r\n") for its newline char. See wikipedia newline↗
for detail.
To do it batch on a list of files, use the following lisp code:
(defun to-unix-eol (fpath)
"Change file's line ending to unix convention."
(let (mybuffer)
(setq mybuffer (find-file fpath))
(set-buffer-file-coding-system 'unix) ; or 'mac or 'dos
(save-buffer)
(kill-buffer mybuffer)
)
)
(mapc 'to-unix-eol
(list
"~/jane/myfile1"
"~/jane/myfile2"
"~/jane/myfile3"
; ...
)
)
To use the code, first edit the list of files above. Then, select all
the code, type “Alt+x eval-region”. That's it.
If you want the function to work on marked files in dired, then use
the following code:
(defun dired-2unix-marked-files ()
"Change to unix line ending for marked (or next arg) files."
(interactive)
(mapc 'to-unix-eol (dired-get-marked-files))
)
Select the code and do “Alt+x eval-region”, then “Alt+x dired”, then
press “m” to mark the files you want, then do “Alt+x dired-dos2unix-
marked-files”.
Xah
∑ http://xahlee.org/
☄
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: ^M characters
2008-10-22 21:25 ` Xah
@ 2008-10-22 23:32 ` Mike Treseler
2008-10-23 19:55 ` Mike Treseler
0 siblings, 1 reply; 6+ messages in thread
From: Mike Treseler @ 2008-10-22 23:32 UTC (permalink / raw
To: help-gnu-emacs
Xah wrote:
> When you paste some code involving different EOL char, most editor
> deal with this by simply converting them to your current EOL. Usually
> they have a preference setting to indicate whether you want this to
> happen automatically or literal. I think emacs should also adapt this
> behavior.
When I run across such a text file,
I use hex-mode to see what is going on.
In every case I have seen, the problem
is due to a malformed end-of-line pattern.
Emacs recognizes and hides standard end-of-line patterns
if they are use consistently.
MAC-like (CR)
DOS-like (CR+LF)
Unix-like (LF)
Corey's file probably has the end-of-line pattern
CR+CR+LF where the first CR is printed ^M
while the CR+LF is interpreted as a DOS end-of-line and hidden.
In this case I would do
(buffer-to-unix)
to fix up the end-of-lines
and then a query-replace of the ^M characters to nothing.
-- Mike Treseler
Corey, see also:
http://www.rfc-editor.org/EOLstory.txt
http://en.wikipedia.org/wiki/Newline
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: ^M characters
@ 2008-10-23 9:49 roodwriter
0 siblings, 0 replies; 6+ messages in thread
From: roodwriter @ 2008-10-23 9:49 UTC (permalink / raw
To: help-gnu-emacs
Corey Foote <coreyfoote@hotmail.com> writes:
> I copied some text into an email buffer, but each line ends with
a funny
> colored character that looks like ^M. What are these characters?
How can I
> remove them without having to manually delete each one? And how
can I
> insert one myself?
>
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
> Stay organized with simple drag and drop from Windows Live
Hotmail. Try it
I'm lazy. I just copy the ^M and then uses M-x replace-regexp. I
paste (yank) the ^M into the command, hit <return> twice and let
it rip. All gone faster than you can read this.
Once upon a time I made a macro that did this, but I rarely get
Microsoft files anymore. (I use Linux.) They may have started out
as Microsoft, but e-mail programs seem to convert them better now.
Rod
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: ^M characters
2008-10-22 23:32 ` Mike Treseler
@ 2008-10-23 19:55 ` Mike Treseler
0 siblings, 0 replies; 6+ messages in thread
From: Mike Treseler @ 2008-10-23 19:55 UTC (permalink / raw
To: help-gnu-emacs
Mike Treseler wrote:
> (buffer-to-unix)
(defun buffer-to-unix () "Change buffer coding to unix"
(interactive)
(set-buffer-file-coding-system 'undecided-unix)
)
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2008-10-23 19:55 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2008-10-22 20:29 ^M characters Corey Foote
2008-10-22 20:43 ` Parker, Matthew
[not found] <mailman.1834.1224707393.25473.help-gnu-emacs@gnu.org>
2008-10-22 21:25 ` Xah
2008-10-22 23:32 ` Mike Treseler
2008-10-23 19:55 ` Mike Treseler
-- strict thread matches above, loose matches on Subject: below --
2008-10-23 9:49 roodwriter
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.