Change strncpy to either memcpy (when we know the len), or strlcpy (when
we used to NUL terminate explicitly.

Fix editing mistake, remove ) from func call that is now gone.

more efficient to use decode_result :-) Pointed out by kre@

PR/53597: Yasuhiro Horimoto: Avoid segmentation fault in bad history file.

branches: 1.59.2; 1.59.4;
The order in which the arguments to a function are evaluated is
undefined, so don't use va_arg() twice.

PR lib/52849

PR/51517: Jay West: Tty settings not restored on exit
PR/51518: Jay West: prompt is interleaved with client output

Both these issues are caused by rl_restore_handler not DTRT; fix
it so that it kills the internal libedit state completely. This is
inefficient, but it works.

Also fix:
1. add append_history()/H_NSAVE_FP
2. call the rl_startup_hook before printing the first prompt as documented.
callint it from rl_initialize breaks python, because the callback ends
up being invoked before the readline module is installed, and we end up
dereferencing a NULL pointer.
3. add el_resize_terminal.

With those changes, s/lreadline/ledit/g in python works.

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

chartype cleanups from Ingo Schwarze:

- The file tokenizer.c no longer uses chartype.h,
so don't include the header.

- The dummy definitions of ct_{de,en}code_string() for the
NARROWCHAR case are only used in history.c, so move them there.

- Now the whole content of chartype.h is for the wide character
case only. So remove the NARROWCHAR ifdef and include the
header only in the wide character case.

- In chartype.h, move ct_encode_char() below the comment explaining it.

- No more need for underscores before ct_{de,en}code_string().

- Make the conversion buffer resize functions private.
They are only called from the decoding and encoding functions
inside chartype.c, and no need can possibly arise to call them
from anywhere else.

Char -> wchar_t from Ingo Schwarze.

more macro WIDECHAR undoing from Ingo Schwarze.

Start removing the WIDECHAR ifdefs; building without it has stopped working
anyway. (Ingo Schwarze)

whitespace and header sorting changes (Ingo Schwarze). No functional changes.

Don't free getline memory (Ingo Schwarze).

Use getline for better portability.

Change the test for the size of encoded buffer to include the NULL, from
OpenBSD; no functional change.

Use fparseln to avoid newline hacks.

Add a history function that takes a FILE pointer; needed for Capsicum.
From Eitan Adler

branches: 1.46.6; 1.46.16;
Add coverity annotations about unreachable code (Kamil Dudka)

branches: 1.45.2;
pass -Wconversion

- fix unused params
- unconditionalize vis.h

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

kill ptr_t and ioctl_t, add * sizeof(*foo) to all allocations.

include vis.h from dot.

fix narrow compilation

- don't leave cursor dangling on memory failure or after clearing the list
- compute the string length to be strvis'ed after the string is encoded

off by one in fetching history data. From: Gerry Swislow

rename historyw -> history_w for consistency.
add wide tst code and make it the default.

Fix wide build, test it, but don't turn it on yet.

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

apply apple patches from:
http://opensource.apple.com/source/libedit/libedit-11/patches/

Plug memory leak, from MySQL.

Fix memory leak found by valgrind (Julien Torres)

Don't forget to initialize h_del; from Julien Torres.

PR/30747: David N. Williams: libedit is missing remove_history()
Added, please test.

Fix memory leaks found by valgrind. From Julien Torres

PR/26785: Jess Thrysoee: libedit - H_NEXT and H_PREV shifts cursor on failure

make sure that we round up to 1K.

PR/26725: Sergey S. Kostyliov: Typo in libedit, possible buffer overflow in src/lib/libedit/history.c:history_save()

change allocation policy in el_push to allocate the string itself.
fix issues with strdup.

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.

Add a uniquefier for the history function.

don't crash in memory shortage conditions.

write the vis(3) converted string into the file, not the original one.
Noted by Tim Robbins. Hi luke!

- 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.

history_def_enter: fix off-by-one mistake in delete condition (the behaviour
to keep at least one entry on the history list is retained)
This fixes lib/9704 by Phil Nelson.

chmod the history file to 600 so that only the owner can read it.
[inspired by the openbsd fix to readline]

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

history_def_set has a `const int' as a third arg, not an `int'.
picked up by the ultrix compiler, reported by simonb@ ...

More trailing white space.

Add missing , in he_errlist[] initializer. Yay lint.

Encode the history lines using strvis() before saving it. Fixes gdb history
problem with missing newlines.

- missing error message from array could cause core dump
- delint

per e-mail with christos: history_next_event() should return -1, not NULL,
in case of error, just like history_prev_event() does.

Add H_APPEND to simplify the interface.

Add a function to be able to set the cursor to a given event number.

PR/4257: Jaromir Dolecek: history() has no generic error handling and isn't
reentrant. This changes the interface of the history function, so we need
a major number bump.

Fix compiler warnings.

Portability fixes:
__const -> const
BADSIG -> SIG_ERR
int flags -> u_int flags
#if __STDC__ -> #ifdef __STDC__

- convert unsafe strcpy(), strcat() and sprintf() to the `n' versions.
- some KNF.

RCSid police
editline first appeared in 4.4BSD not NetBSD1.0

Added history load and save to file functions.

branches: 1.1.1;
Initial revision

Fix editing mistake, remove ) from func call that is now gone.

more efficient to use decode_result :-) Pointed out by kre@

PR/53597: Yasuhiro Horimoto: Avoid segmentation fault in bad history file.

branches: 1.59.2;
The order in which the arguments to a function are evaluated is
undefined, so don't use va_arg() twice.

PR lib/52849

PR/51517: Jay West: Tty settings not restored on exit
PR/51518: Jay West: prompt is interleaved with client output

Both these issues are caused by rl_restore_handler not DTRT; fix
it so that it kills the internal libedit state completely. This is
inefficient, but it works.

Also fix:
1. add append_history()/H_NSAVE_FP
2. call the rl_startup_hook before printing the first prompt as documented.
callint it from rl_initialize breaks python, because the callback ends
up being invoked before the readline module is installed, and we end up
dereferencing a NULL pointer.
3. add el_resize_terminal.

With those changes, s/lreadline/ledit/g in python works.

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

chartype cleanups from Ingo Schwarze:

- The file tokenizer.c no longer uses chartype.h,
so don't include the header.

- The dummy definitions of ct_{de,en}code_string() for the
NARROWCHAR case are only used in history.c, so move them there.

- Now the whole content of chartype.h is for the wide character
case only. So remove the NARROWCHAR ifdef and include the
header only in the wide character case.

- In chartype.h, move ct_encode_char() below the comment explaining it.

- No more need for underscores before ct_{de,en}code_string().

- Make the conversion buffer resize functions private.
They are only called from the decoding and encoding functions
inside chartype.c, and no need can possibly arise to call them
from anywhere else.

Char -> wchar_t from Ingo Schwarze.

more macro WIDECHAR undoing from Ingo Schwarze.

Start removing the WIDECHAR ifdefs; building without it has stopped working
anyway. (Ingo Schwarze)

whitespace and header sorting changes (Ingo Schwarze). No functional changes.

Don't free getline memory (Ingo Schwarze).

Use getline for better portability.

Change the test for the size of encoded buffer to include the NULL, from
OpenBSD; no functional change.

Use fparseln to avoid newline hacks.

Add a history function that takes a FILE pointer; needed for Capsicum.
From Eitan Adler

branches: 1.46.6; 1.46.16;
Add coverity annotations about unreachable code (Kamil Dudka)

branches: 1.45.2;
pass -Wconversion

- fix unused params
- unconditionalize vis.h

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

kill ptr_t and ioctl_t, add * sizeof(*foo) to all allocations.

include vis.h from dot.

fix narrow compilation

- don't leave cursor dangling on memory failure or after clearing the list
- compute the string length to be strvis'ed after the string is encoded

off by one in fetching history data. From: Gerry Swislow

rename historyw -> history_w for consistency.
add wide tst code and make it the default.

Fix wide build, test it, but don't turn it on yet.

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

apply apple patches from:
http://opensource.apple.com/source/libedit/libedit-11/patches/

Plug memory leak, from MySQL.

Fix memory leak found by valgrind (Julien Torres)

Don't forget to initialize h_del; from Julien Torres.

PR/30747: David N. Williams: libedit is missing remove_history()
Added, please test.

Fix memory leaks found by valgrind. From Julien Torres

PR/26785: Jess Thrysoee: libedit - H_NEXT and H_PREV shifts cursor on failure

make sure that we round up to 1K.

PR/26725: Sergey S. Kostyliov: Typo in libedit, possible buffer overflow in src/lib/libedit/history.c:history_save()

change allocation policy in el_push to allocate the string itself.
fix issues with strdup.

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.

Add a uniquefier for the history function.

don't crash in memory shortage conditions.

write the vis(3) converted string into the file, not the original one.
Noted by Tim Robbins. Hi luke!

- 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.

history_def_enter: fix off-by-one mistake in delete condition (the behaviour
to keep at least one entry on the history list is retained)
This fixes lib/9704 by Phil Nelson.

chmod the history file to 600 so that only the owner can read it.
[inspired by the openbsd fix to readline]

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

history_def_set has a `const int' as a third arg, not an `int'.
picked up by the ultrix compiler, reported by simonb@ ...

More trailing white space.

Add missing , in he_errlist[] initializer. Yay lint.

Encode the history lines using strvis() before saving it. Fixes gdb history
problem with missing newlines.

- missing error message from array could cause core dump
- delint

per e-mail with christos: history_next_event() should return -1, not NULL,
in case of error, just like history_prev_event() does.

Add H_APPEND to simplify the interface.

Add a function to be able to set the cursor to a given event number.

PR/4257: Jaromir Dolecek: history() has no generic error handling and isn't
reentrant. This changes the interface of the history function, so we need
a major number bump.

Fix compiler warnings.

Portability fixes:
__const -> const
BADSIG -> SIG_ERR
int flags -> u_int flags
#if __STDC__ -> #ifdef __STDC__

- convert unsafe strcpy(), strcat() and sprintf() to the `n' versions.
- some KNF.

RCSid police
editline first appeared in 4.4BSD not NetBSD1.0

Added history load and save to file functions.

branches: 1.1.1;
Initial revision

The order in which the arguments to a function are evaluated is
undefined, so don't use va_arg() twice.

PR lib/52849

PR/51517: Jay West: Tty settings not restored on exit
PR/51518: Jay West: prompt is interleaved with client output

Both these issues are caused by rl_restore_handler not DTRT; fix
it so that it kills the internal libedit state completely. This is
inefficient, but it works.

Also fix:
1. add append_history()/H_NSAVE_FP
2. call the rl_startup_hook before printing the first prompt as documented.
callint it from rl_initialize breaks python, because the callback ends
up being invoked before the readline module is installed, and we end up
dereferencing a NULL pointer.
3. add el_resize_terminal.

With those changes, s/lreadline/ledit/g in python works.

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

chartype cleanups from Ingo Schwarze:

- The file tokenizer.c no longer uses chartype.h,
so don't include the header.

- The dummy definitions of ct_{de,en}code_string() for the
NARROWCHAR case are only used in history.c, so move them there.

- Now the whole content of chartype.h is for the wide character
case only. So remove the NARROWCHAR ifdef and include the
header only in the wide character case.

- In chartype.h, move ct_encode_char() below the comment explaining it.

- No more need for underscores before ct_{de,en}code_string().

- Make the conversion buffer resize functions private.
They are only called from the decoding and encoding functions
inside chartype.c, and no need can possibly arise to call them
from anywhere else.

Char -> wchar_t from Ingo Schwarze.

more macro WIDECHAR undoing from Ingo Schwarze.

Start removing the WIDECHAR ifdefs; building without it has stopped working
anyway. (Ingo Schwarze)

whitespace and header sorting changes (Ingo Schwarze). No functional changes.

Don't free getline memory (Ingo Schwarze).

Use getline for better portability.

Change the test for the size of encoded buffer to include the NULL, from
OpenBSD; no functional change.

Use fparseln to avoid newline hacks.

Add a history function that takes a FILE pointer; needed for Capsicum.
From Eitan Adler

branches: 1.46.6; 1.46.16;
Add coverity annotations about unreachable code (Kamil Dudka)

branches: 1.45.2;
pass -Wconversion

- fix unused params
- unconditionalize vis.h

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

kill ptr_t and ioctl_t, add * sizeof(*foo) to all allocations.

include vis.h from dot.

fix narrow compilation

- don't leave cursor dangling on memory failure or after clearing the list
- compute the string length to be strvis'ed after the string is encoded

off by one in fetching history data. From: Gerry Swislow

rename historyw -> history_w for consistency.
add wide tst code and make it the default.

Fix wide build, test it, but don't turn it on yet.

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

apply apple patches from:
http://opensource.apple.com/source/libedit/libedit-11/patches/

Plug memory leak, from MySQL.

Fix memory leak found by valgrind (Julien Torres)

Don't forget to initialize h_del; from Julien Torres.

PR/30747: David N. Williams: libedit is missing remove_history()
Added, please test.

Fix memory leaks found by valgrind. From Julien Torres

PR/26785: Jess Thrysoee: libedit - H_NEXT and H_PREV shifts cursor on failure

make sure that we round up to 1K.

PR/26725: Sergey S. Kostyliov: Typo in libedit, possible buffer overflow in src/lib/libedit/history.c:history_save()

change allocation policy in el_push to allocate the string itself.
fix issues with strdup.

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.

Add a uniquefier for the history function.

don't crash in memory shortage conditions.

write the vis(3) converted string into the file, not the original one.
Noted by Tim Robbins. Hi luke!

- 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.

history_def_enter: fix off-by-one mistake in delete condition (the behaviour
to keep at least one entry on the history list is retained)
This fixes lib/9704 by Phil Nelson.

chmod the history file to 600 so that only the owner can read it.
[inspired by the openbsd fix to readline]

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

history_def_set has a `const int' as a third arg, not an `int'.
picked up by the ultrix compiler, reported by simonb@ ...

More trailing white space.

Add missing , in he_errlist[] initializer. Yay lint.

Encode the history lines using strvis() before saving it. Fixes gdb history
problem with missing newlines.

- missing error message from array could cause core dump
- delint

per e-mail with christos: history_next_event() should return -1, not NULL,
in case of error, just like history_prev_event() does.

Add H_APPEND to simplify the interface.

Add a function to be able to set the cursor to a given event number.

PR/4257: Jaromir Dolecek: history() has no generic error handling and isn't
reentrant. This changes the interface of the history function, so we need
a major number bump.

Fix compiler warnings.

Portability fixes:
__const -> const
BADSIG -> SIG_ERR
int flags -> u_int flags
#if __STDC__ -> #ifdef __STDC__

- convert unsafe strcpy(), strcat() and sprintf() to the `n' versions.
- some KNF.

RCSid police
editline first appeared in 4.4BSD not NetBSD1.0

Added history load and save to file functions.

branches: 1.1.1;
Initial revision

PR/51517: Jay West: Tty settings not restored on exit
PR/51518: Jay West: prompt is interleaved with client output

Both these issues are caused by rl_restore_handler not DTRT; fix
it so that it kills the internal libedit state completely. This is
inefficient, but it works.

Also fix:
1. add append_history()/H_NSAVE_FP
2. call the rl_startup_hook before printing the first prompt as documented.
callint it from rl_initialize breaks python, because the callback ends
up being invoked before the readline module is installed, and we end up
dereferencing a NULL pointer.
3. add el_resize_terminal.

With those changes, s/lreadline/ledit/g in python works.

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

chartype cleanups from Ingo Schwarze:

- The file tokenizer.c no longer uses chartype.h,
so don't include the header.

- The dummy definitions of ct_{de,en}code_string() for the
NARROWCHAR case are only used in history.c, so move them there.

- Now the whole content of chartype.h is for the wide character
case only. So remove the NARROWCHAR ifdef and include the
header only in the wide character case.

- In chartype.h, move ct_encode_char() below the comment explaining it.

- No more need for underscores before ct_{de,en}code_string().

- Make the conversion buffer resize functions private.
They are only called from the decoding and encoding functions
inside chartype.c, and no need can possibly arise to call them
from anywhere else.

Char -> wchar_t from Ingo Schwarze.

more macro WIDECHAR undoing from Ingo Schwarze.

Start removing the WIDECHAR ifdefs; building without it has stopped working
anyway. (Ingo Schwarze)

whitespace and header sorting changes (Ingo Schwarze). No functional changes.

Don't free getline memory (Ingo Schwarze).

Use getline for better portability.

Change the test for the size of encoded buffer to include the NULL, from
OpenBSD; no functional change.

Use fparseln to avoid newline hacks.

Add a history function that takes a FILE pointer; needed for Capsicum.
From Eitan Adler

branches: 1.46.6; 1.46.16;
Add coverity annotations about unreachable code (Kamil Dudka)

branches: 1.45.2;
pass -Wconversion

- fix unused params
- unconditionalize vis.h

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

kill ptr_t and ioctl_t, add * sizeof(*foo) to all allocations.

include vis.h from dot.

fix narrow compilation

- don't leave cursor dangling on memory failure or after clearing the list
- compute the string length to be strvis'ed after the string is encoded

off by one in fetching history data. From: Gerry Swislow

rename historyw -> history_w for consistency.
add wide tst code and make it the default.

Fix wide build, test it, but don't turn it on yet.

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

apply apple patches from:
http://opensource.apple.com/source/libedit/libedit-11/patches/

Plug memory leak, from MySQL.

Fix memory leak found by valgrind (Julien Torres)

Don't forget to initialize h_del; from Julien Torres.

PR/30747: David N. Williams: libedit is missing remove_history()
Added, please test.

Fix memory leaks found by valgrind. From Julien Torres

PR/26785: Jess Thrysoee: libedit - H_NEXT and H_PREV shifts cursor on failure

make sure that we round up to 1K.

PR/26725: Sergey S. Kostyliov: Typo in libedit, possible buffer overflow in src/lib/libedit/history.c:history_save()

change allocation policy in el_push to allocate the string itself.
fix issues with strdup.

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.

Add a uniquefier for the history function.

don't crash in memory shortage conditions.

write the vis(3) converted string into the file, not the original one.
Noted by Tim Robbins. Hi luke!

- 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.

history_def_enter: fix off-by-one mistake in delete condition (the behaviour
to keep at least one entry on the history list is retained)
This fixes lib/9704 by Phil Nelson.

chmod the history file to 600 so that only the owner can read it.
[inspired by the openbsd fix to readline]

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

history_def_set has a `const int' as a third arg, not an `int'.
picked up by the ultrix compiler, reported by simonb@ ...

More trailing white space.

Add missing , in he_errlist[] initializer. Yay lint.

Encode the history lines using strvis() before saving it. Fixes gdb history
problem with missing newlines.

- missing error message from array could cause core dump
- delint

per e-mail with christos: history_next_event() should return -1, not NULL,
in case of error, just like history_prev_event() does.

Add H_APPEND to simplify the interface.

Add a function to be able to set the cursor to a given event number.

PR/4257: Jaromir Dolecek: history() has no generic error handling and isn't
reentrant. This changes the interface of the history function, so we need
a major number bump.

Fix compiler warnings.

Portability fixes:
__const -> const
BADSIG -> SIG_ERR
int flags -> u_int flags
#if __STDC__ -> #ifdef __STDC__

- convert unsafe strcpy(), strcat() and sprintf() to the `n' versions.
- some KNF.

RCSid police
editline first appeared in 4.4BSD not NetBSD1.0

Added history load and save to file functions.

branches: 1.1.1;
Initial revision

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

chartype cleanups from Ingo Schwarze:

- The file tokenizer.c no longer uses chartype.h,
so don't include the header.

- The dummy definitions of ct_{de,en}code_string() for the
NARROWCHAR case are only used in history.c, so move them there.

- Now the whole content of chartype.h is for the wide character
case only. So remove the NARROWCHAR ifdef and include the
header only in the wide character case.

- In chartype.h, move ct_encode_char() below the comment explaining it.

- No more need for underscores before ct_{de,en}code_string().

- Make the conversion buffer resize functions private.
They are only called from the decoding and encoding functions
inside chartype.c, and no need can possibly arise to call them
from anywhere else.

Char -> wchar_t from Ingo Schwarze.

more macro WIDECHAR undoing from Ingo Schwarze.

Start removing the WIDECHAR ifdefs; building without it has stopped working
anyway. (Ingo Schwarze)

whitespace and header sorting changes (Ingo Schwarze). No functional changes.

Don't free getline memory (Ingo Schwarze).

Use getline for better portability.

Change the test for the size of encoded buffer to include the NULL, from
OpenBSD; no functional change.

Use fparseln to avoid newline hacks.

Add a history function that takes a FILE pointer; needed for Capsicum.
From Eitan Adler

branches: 1.46.6; 1.46.16;
Add coverity annotations about unreachable code (Kamil Dudka)

branches: 1.45.2;
pass -Wconversion

- fix unused params
- unconditionalize vis.h

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

kill ptr_t and ioctl_t, add * sizeof(*foo) to all allocations.

include vis.h from dot.

fix narrow compilation

- don't leave cursor dangling on memory failure or after clearing the list
- compute the string length to be strvis'ed after the string is encoded

off by one in fetching history data. From: Gerry Swislow

rename historyw -> history_w for consistency.
add wide tst code and make it the default.

Fix wide build, test it, but don't turn it on yet.

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

apply apple patches from:
http://opensource.apple.com/source/libedit/libedit-11/patches/

Plug memory leak, from MySQL.

Fix memory leak found by valgrind (Julien Torres)

Don't forget to initialize h_del; from Julien Torres.

PR/30747: David N. Williams: libedit is missing remove_history()
Added, please test.

Fix memory leaks found by valgrind. From Julien Torres

PR/26785: Jess Thrysoee: libedit - H_NEXT and H_PREV shifts cursor on failure

make sure that we round up to 1K.

PR/26725: Sergey S. Kostyliov: Typo in libedit, possible buffer overflow in src/lib/libedit/history.c:history_save()

change allocation policy in el_push to allocate the string itself.
fix issues with strdup.

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.

Add a uniquefier for the history function.

don't crash in memory shortage conditions.

write the vis(3) converted string into the file, not the original one.
Noted by Tim Robbins. Hi luke!

- 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.

history_def_enter: fix off-by-one mistake in delete condition (the behaviour
to keep at least one entry on the history list is retained)
This fixes lib/9704 by Phil Nelson.

chmod the history file to 600 so that only the owner can read it.
[inspired by the openbsd fix to readline]

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

history_def_set has a `const int' as a third arg, not an `int'.
picked up by the ultrix compiler, reported by simonb@ ...

More trailing white space.

Add missing , in he_errlist[] initializer. Yay lint.

Encode the history lines using strvis() before saving it. Fixes gdb history
problem with missing newlines.

- missing error message from array could cause core dump
- delint

per e-mail with christos: history_next_event() should return -1, not NULL,
in case of error, just like history_prev_event() does.

Add H_APPEND to simplify the interface.

Add a function to be able to set the cursor to a given event number.

PR/4257: Jaromir Dolecek: history() has no generic error handling and isn't
reentrant. This changes the interface of the history function, so we need
a major number bump.

Fix compiler warnings.

Portability fixes:
__const -> const
BADSIG -> SIG_ERR
int flags -> u_int flags
#if __STDC__ -> #ifdef __STDC__

- convert unsafe strcpy(), strcat() and sprintf() to the `n' versions.
- some KNF.

RCSid police
editline first appeared in 4.4BSD not NetBSD1.0

Added history load and save to file functions.

branches: 1.1.1;
Initial revision