add literal escape sequence support, patterned after the tcsh ones.

s/protected/libedit_private/g

Get rid of private/public; keep protected (Ingo Schwarze)

Char -> wchar_t from Ingo Schwarze.

From Ingo Scharze:
Let "el.h" include everything needed for struct editline,
and don't include that stuff multiple times. That also improves
consistency, also avoids circular inclusions, and also ma

From Ingo Scharze:
Let "el.h" include everything needed for struct editline,
and don't include that stuff multiple times. That also improves
consistency, also avoids circular inclusions, and also makes it
easier to follow what is going on, even though not quite as nice.
But it seems like the best we can do...

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cleanup chartype.h includes (Ingo Schwarze)

cleanup inclusion of histedit.h (Ingo Schwarze)

KNF return (\1); -> return \1;

term -> terminal
XXX: need to rename key_ too.

- Document and enable wide character support.
- Fix read function compatibility.

Wide character support (UTF-8) from Johny Mattsson; currently disabled.

handle prompt_esc properly.

PR/41230: -current: sh(1) endlessly looping in interactive
Fix proposed from Matthew Mondor

Implement literal prompt sequences. Now someone can implement
RL_PROMPT_START_LITERAL/RL_PROMPT_END_LITERAL :-)

back out all prompt changes. they are not needed.

allow for a prompt argument.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

From michael@moria.de:
- use __attribute__((__unused__)) in arguments where appropriate.
- some int -> size_t and char * to const char * conversions.

- constify; passes all gcc and lint strict checks.
- add config.h [Jason Evans], to create a portable version of libedit that
can be easily compiled on other OS's.

Enlarge editline buffers as needed to support arbitrary length lines.
This also addresses lib/9712 by Phil Nelson.

convert to new style guide, which includes:
- ansi prototypes & features (such as stdargs)
- 8 space indents

- implement printing a right-side prompt. code derived from similar work
I wrote for tcsh(1) three years ago.
- implement EL_RPROMPT, which allows a setting/getting of a function which
returns a

- implement printing a right-side prompt. code derived from similar work
I wrote for tcsh(1) three years ago.
- implement EL_RPROMPT, which allows a setting/getting of a function which
returns a string to be used as the right-side prompt.
- improve HISTORY and AUTHORS sections in editline(3).
- bump shlib minor version for EL_RPROMPT.

XXX: due to an implementation issue, the rprompt has a 1 space gap before the
edge of the logical screen. editline's logical screen is 1 space less
than the full screen width, so there's a 2 space gap between the rprompt
and the right end of the physical screen. i'm not concerned about this.

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More trailing white space.

* add more checks for NULL pointers in passed arguments
* implement el_get(EditLine *, int op, void *result), which does the
inverse of el_set()
* add EL_EDITMODE operation to el_set and el_get; if

* add more checks for NULL pointers in passed arguments
* implement el_get(EditLine *, int op, void *result), which does the
inverse of el_set()
* add EL_EDITMODE operation to el_set and el_get; if non zero editing
is enabled (the default).
* add "edit on | off" editrc command, which modifies EL_EDITMODE.
users can now add '*:edit off' in ~/.editrc as an advisory to
disable editing.

NOTE: at this time EL_EDITMODE is just an indication of the
state of the 'edit' command. It's up to the application to check
this after el_source() or el_parse() to determine if editing is still
required.

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Fix compiler warnings.