The tecla library change log

    In the following log, modification dates are listed using the European
    convention in which the day comes before the month (ie. DD/MM/YYYY).
    The most recent modifications are listed first.

    10/12/2001 mcs@astro.caltech.edu
               getline.c
                 If the TIOCGWINSZ ioctl doesn't work, as is the case when
                 running in an emacs shell, leave the size unchanged, rather
                 than returning a fatal error.

    07/12/2001 mcs@astro.caltech.edu
               configure.in configure
                 Now that the configure version of CFLAGS is included in
                 the makefile, I noticed that the optimization flags -g
                 and -O2 had been added. It turns out that if CFLAGS isn't
                 already set, the autoconf AC_PROG_CC macro initializes it
                 with these two optimization flags. Since this would break
                 backwards compatibility in embedded distributions that
                 already use the OPT= makefile argument, and because
                 turning debugging on needlessly bloats the library, I now
                 make sure that CFLAGS is set before calling this macro.

    07/12/2001 mcs@astro.caltech.edu
               enhance.c
                 Use argv[0] in error reports instead of using a
                 hardcoded macro.

    07/12/2001 mcs@astro.caltech.edu
               getline.c
                 The cut buffer wasn't being cleared after being
                 used as a work buffer by gl_load_history().

    06/12/2001 mcs@astro.caltech.edu
               configure.in configure
                 I removed my now redundant definition of SUN_TPUTS from
                 CFLAGS. I also added "-I/usr/include" to CFLAGS under
                 Solaris to prevent gcc from seeing conflicting versions
                 of system header files in /usr/local/include.

    06/12/2001 Markus Gyger (logged here by mcs)
               Lots of files.
                 Lots of corrections to misspellings and typos in the
                 comments.
               getline.c
                 Markus reverted a supposed fix that I added a day or two
                 ago. I had incorrectly thought that in Solaris 8, Sun had
                 finally brought their declaration of the callback
                 function of tputs() into line with other systems, but it
                 turned out that gcc was pulling in a GNU version of
                 term.h from /usr/local/include, and this was what
                 confused me.

    05/12/2001 mcs@astro.caltech.edu
               Makefile.in
                 I added @CFLAGS@ to the CFLAGS assignment, so that
                 if CFLAGS is set as an environment variable when
                 configure is run, the corresponding make variable
                 includes its values in the output makefile.

    05/12/2001 mcs@astro.caltech.edu
               getline.c libtecla.h libtecla.map man3/gl_get_line.3
               man3/gl_last_signal.3
                 I added a function that programs can use to find out
                 which signal caused gl_get_line() to return EINTR.

    05/12/2001 mcs@astro.caltech.edu
               getline.c
                 When the newline action was triggered by a printable
                 character, it failed to display that character. It now
                 does. Also, extra control codes that I had added, to
                 clear to the end of the display after the carriage return,
                 but before displaying the prompt, were confusing expect
                 scripts, so I have removed them. This step is now done
                 instead in gl_redisplay() after displaying the full input
                 line.

    05/12/2001 mcs@astro.caltech.edu
               getline.c man3/gl_get_line.3
                 A user convinced me that continuing to invoke meta
                 keybindings for meta characters that are printable is a
                 bad idea, as is allowing users to ask to have setlocale()
                 called behind the application's back. I have thus changed
                 this. The setlocale configuration option has gone, and
                 gl_get_line() is now completely 8-bit clean, by default.
                 This means that if a meta character is printable, it is
                 treated as a literal character, rather than a potential
                 M-c binding.  Meta bindings can still be invoked via
                 their Esc-c equivalents, and indeed most terminal
                 emulators either output such escape pairs by default when
                 the meta character is pressed, or can be configured to do
                 so. I have documented how to configure xterm to do this,
                 in the man page.

    03/12/2001 mcs@astro.caltech.edu
               getline.c man3/gl_get_line.3
                 gl_get_line() by default now prints any 8-bit printable
                 characters that don't match keybindings. Previously
                 characters > 127 were only printed if preceded by the
                 literal-next action.  Alternatively, by placing the
                 command literal_if_printable in the tecla configuration
                 file, all printable characters are treated as literal
                 characters, even if they are bound to action functions.

                 For international users of programs written by
                 programmers that weren't aware of the need to call
                 setlocale() to support alternate character sets, the
                 configuration file can now also contain the single-word
                 command "setlocale", which tells gl_get_line() to remedy
                 this.

    27/11/2001 mcs@astro.caltech.edu
               demo.c demo2.c enhance man3/gl_get_line.3
                 All demos and programs now call setlocale(LC_CTYPE,"").
                 This makes them support character sets of different
                 locales, where specified with the LC_CTYPE, LC_ALL, or
                 LANG environment variables. I also added this to the demo
                 in the man page, and documented its effect.

    27/11/2001 mcs@astro.caltech.edu
               getline.c
                 When displaying unsigned characters with values over
                 127 literally, previously it was assumed that they would
                 all be displayable. Now isprint() is consulted, and if it
                 says that a character isn't printable, the character code
                 is displayed in octal like \307. In non-C locales, some
                 characters with values > 127 are displayable, and
                 isprint() tells gl_get_line() which are and which aren't.

    27/11/2001 mcs@astro.caltech.edu
               getline.c pathutil.c history.c enhance.c demo2.c
                 All arguments of the ctype.h character class functions
                 are now cast to (int)(unsigned char). Previously they
                 were cast to (int), which doesn't correctly conform to
                 the requirements of the C standard, and could cause
                 problems for characters with values > 127 on systems
                 with signed char's.

    26/11/2001 mcs@astro.caltech.edu
               man3/enhance.3 man3/libtecla.3
                 I started writing a man page for the enhance program.

    26/11/2001 mcs@astro.caltech.edu
               Makefile.in Makefile.rules INSTALL
                 It is now possible to specify whether the demos and other
                 programs are to be built, by overriding the default
                 values of the DEMOS, PROGRAMS and PROGRAMS_R variables.
                 I have also documented the BINDIR variable and the
                 install_bin makefile target.

    22/11/2001 mcs@astro.caltech.edu
               getline.c libtecla.h libtecla.map man3/gl_get_line.3
               man3/gl_ignore_signal.3 man3/gl_trap_signal.3
                 Signal handling has now been modified to be customizable.
                 Signals that are trapped by default can be removed from
                 the list of trapped signals, and signals that aren't
                 currently trapped, can be added to the list. Applications
                 can also specify the signal and terminal environments in
                 which an application's signal handler is invoked, and
                 what gl_get_line() does after the signal handler returns.

    13/11/2001 mcs@astro.caltech.edu
               getline.c man3/gl_get_line.3
                 Added half-bright, reverse-video and blinking text to the
                 available prompt formatting options.
               getline.c
                 Removed ^O from the default VT100 sgr0 capability
                 string.  Apparently it can cause problems with some
                 terminal emulators, and we don't need it, since it turns
                 off the alternative character set mode, which we don't
                 use.
               getline.c
                 gl_tigetstr() and gl_tgetstr() didn't guard against the
                 error returns of tigetstr() and tgetstr() respectively.
                 They now do.

    11/11/2001 mcs@astro.caltech.edu
               getline.c libtecla.h libtecla.map man3/gl_get_line.3
               man3/gl_prompt_style.3
                 Although the default remains to display the prompt string
                 literally, the new gl_prompt_style() function can be used
                 to enable text attribute formatting directives in prompt
                 strings, such as underlining, bold font, and highlighting
                 directives.

    09/11/2001 mcs@astro.caltech.edu
               enhance.c Makefile.rules configure.in configure
                 I added a new program to the distribution that allows one
                 to run most third party programs with the tecla library
                 providing command-line editing.

    08/11/2001 mcs@astro.caltech.edu
               libtecla.h getline.c man3/gl_get_line.3 history.c history.h
                 I added a max_lines argument to gl_show_history() and
                 _glh_show_history(). This can optionally be used to
                 set a limit on the number of history lines displayed.
               libtecla.h getline.c man3/gl_get_line.3
                 I added a new function called gl_replace_prompt(). This
                 can be used by gl_get_line() callback functions to
                 request that a new prompt be use when they return.

    06/11/2001 mcs@astro.caltech.edu
               getline.c man3/gl_get_line.3
                 I implemented, bound and documented the list-history
                 action, used for listing historical lines of the current
                 history group.
               getline.c man3/gl_get_line.3 man3/gl_echo_mode.3
                 I wrote functions to specify and query whether subsequent
                 lines will be visible as they are being typed.

    28/10/2001 mcs@astro.caltech.edu
               getline.c man3/gl_get_line.3
                 For those cases where a terminal provides its own
                 high-level terminal editing facilities, you can now
                 specify an edit-mode argument of 'none'. This disables
                 all tecla key bindings, and by using canonical terminal
                 input mode instead of raw input mode, editing is left up
                 to the terminal driver.

    21/10/2001 mcs@astro.caltech.edu
               libtecla.h getline.c history.c history.h
               man3/gl_get_line.3 man3/gl_history_info.3
                 I added the new gl_state_of_history(),
                 gl_range_of_history() and gl_size_of_history()
                 functions for querying information about the
                 history list.
               history.c
                 While testing the new gl_size_of_history()
                 function, I noticed that when the history buffer
                 wrapped, any location nodes of old lines between
                 the most recent line and the end of the buffer
                 weren't being removed. This could result in bogus
                 entries appearing at the start of the history list.
                 Now fixed.

    20/10/2001 mcs@astro.caltech.edu

               libtecla.h getline.c history.c history.h
               man3/gl_get_line.3 man3/gl_lookup_history.3
                 I added a function called gl_lookup_history(), that
                 the application can use to lookup lines in the history
                 list.
               libtecla.h getline.c history.c history.h man3/gl_get_line.3
                 gl_show_history() now takes a format string argument
                 to control how the line is displayed, and with what
                 information. It also now provides the option of either
                 displaying all history lines or just those of the
                 current history group.
               getline.c man3/gl_get_line.3
                 gl_get_line() only archives lines in the history buffer
                 if the newline action was invoked by a newline or
                 carriage return character.

    16/10/2001 mcs@astro.caltech.edu

               history.c history.h getline.c libtecla.h libtecla.map
               man3/gl_get_line.3 man3/gl_resize_history.3
               man3/gl_limit_history.3 man3/gl_clear_history.3
               man3/gl_toggle_history.3
    	     I added a number of miscellaneous history configuration
    	     functions. You can now resize or delete the history
    	     buffer, limit the number of lines that are allowed in the
    	     buffer, clear either all history or just the history of
    	     the current history group, and temporarily enable and
    	     disable the history mechanism.

    13/10/2001 mcs@astro.caltech.edu

               getline.c
                 tputs_fp is now only declared if using termcap or
                 terminfo.
               getline.c libtecla.map man3/gl_get_line.3
               man3/gl_terminal_size.3
                 I added a public gl_terminal_size() function for
                 updating and querying the current size of the terminal.
               update_version configure.in libtecla.h
                 A user noted that on systems where the configure script
                 couldn't be used, it was inconvenient to have the version
                 number macros set by the configure script, so they are
                 now specified in libtecla.h. To reduce the likelihood
                 that the various files where the version number now
                 appears might get out of sync, I have written the
                 update_version script, which changes the version number
                 in all of these files to a given value.

    01/10/2001 mcs@astro.caltech.edu

               getline.c history.c history.h man3/gl_get_line.3
                 I added a max_lines argument to gl_save_history(), to
                 allow people to optionally place a ceiling on the number
                 of history lines saved. Specifying this as -1 sets the
                 ceiling to infinity.

    01/10/2001 mcs@astro.caltech.edu

               configure.in configure
                 Under digital unix, getline wouldn't compile with
                 _POSIX_C_SOURCE set, due to type definitions needed by
                 select being excluded by this flag. Defining the
                 _OSF_SOURCE macro as well on this system, resolved this.

    30/09/2001 mcs@astro.caltech.edu

               getline.c libtecla.h history.c history.h man3/gl_get_line.3
               man3/gl_group_history.3
                 I implemented history streams. History streams
                 effectively allow multiple history lists to be stored in
                 a single history buffer. Lines in the buffer are tagged
                 with the current stream identification number, and
                 lookups only consider lines that are marked with the
                 current stream identifier.
               getline.c libtecla.h history.c history.h man3/gl_get_line.3
               man3/gl_show_history.3
                 The new gl_show_history function displays the current
                 history to a given stdio output stream.

    29/09/2001 mcs@astro.caltech.edu

               getline.c
                 Previously new_GetLine() installed a persistent signal
                 handler to be sure to catch the SIGWINCH (terminal size
                 change) signal between calls to gl_get_line(). This had
                 the drawback that if multiple GetLine objects were
                 created, only the first GetLine object used after the
                 signal was received, would see the signal and adapt to
                 the new terminal size. Instead of this, a signal handler
                 for sigwinch is only installed while gl_get_line() is
                 running, and just after installing this handler,
                 gl_get_line() checks for terminal size changes that
                 might have occurred while the signal handler wasn't
                 installed.
               getline.c
                 Dynamically allocated copies of capability strings looked
                 up in the terminfo or termcap databases are now made, so
                 that calls to setupterm() etc for one GetLine object
                 don't get trashed when another GetLine object calls
                 setupterm() etc. It is now safe to allocate and use
                 multiple GetLine objects, albeit only within a single
                 thread.

    28/09/2001 mcs@astro.caltech.edu

               version.c Makefile.rules
                 I added a function for querying the version number of
                 the library.

    26/09/2001 mcs@astro.caltech.edu

               getline.c man3/gl_get_line.3
                 I added the new gl_watch_fd() function, which allows
                 applications to register callback functions to be invoked
                 when activity is seen on arbitrary file descriptors while
                 gl_get_line() is awaiting keyboard input from the user.

               keytab.c
                 If a request is received to delete a non-existent
                 binding, which happens to be an ambiguous prefix of other
                 bindings no complaint is now generated about it being
                 ambiguous.

    23/09/2001 mcs@astro.caltech.edu

               getline.c history.c history.h man3/gl_get_line.3
               libtecla.map demo.c
                 I added new public functions for saving and restoring the
                 contents of the history list. The demo program now uses
                 these functions to load and save history in ~/.demo_history.

    23/09/2001 mcs@astro.caltech.edu

               getline.c
                 On trying the demo for the first time on a KDE konsole
                 terminal, I discovered that the default M-O binding
                 to repeat history was hiding the arrow keys, which are
                 M-OA etc. I have removed this binding. The M-o (ie the
                 lower case version of this), is still bound.

    18/09/2001 mcs@astro.caltech.edu

               getline.c man3/gl_get_line.3 libtecla.map
                 Automatic reading of ~/.teclarc is now postponed until
                 the first call to gl_get_line(), to give the application
                 the chance to specify alternative configuration sources
                 with the new function gl_configure_getline(). The latter
                 function allows configuration to be done with a string, a
                 specified application-specific file, and/or a specified
                 user-specific file. I also added a read-init-files action
                 function, for re-reading the configuration files, if any.
                 This is by default bound to ^X^R. This is all documented
                 in gl_get_line.3.

    08/09/2001 mcs@astro.caltech.edu

               getline.c man3/gl_get_line.3
                 It is now possible to bind actions to key-sequences
                 that start with printable characters. Previously
                 keysequences were required to start with meta or control
                 characters. This is documented in gl_get_line.3.

               getline.c man3/gl_get_line.3
                 A customized completion function can now arrange for
                 gl_get_line() to return the current input line whenever a
                 successful completion has been made. This is signalled by
                 setting the last character of the optional continuation
                 suffix to a newline character. This is documented in
                 gl_get_line.3.

    05/07/2001 Bug reported by Mike MacFaden, fixed by mcs

               configure.in
                 There was a bug in the configure script that only
                 revealed itself on systems without termcap but not
                 terminfo (eg. NetBSD). I traced the bug back to a lack of
                 sufficient quoting of multi-line m4 macro arguments in
                 configure.in, and have now fixed this and recreated the
                 configure script.

    05/07/2001 Bug reported and patched by Mike MacFaden (patch modified
               by mcs to match original intentions).

               getline.c
                 getline.c wouldn't compile when termcap was selected as
                 the terminal information database. setupterm() was being
                 passed a non-existent variable, in place of the term[]
                 argument of gl_control_strings(). Also if
                 gl_change_terminal() is called with term==NULL, "ansi"
                 is now substituted.

    02/07/2001 Version 1.3.3 released.

    27/06/2001 mcs@astro.caltech.edu

               getline.c expand.c cplmatch.c
                 Added checks to fprintf() statements that write to the
                 terminal.
               getline.c
                 Move the cursor to the end of the line before suspending,
                 so that the cursor doesn't get left in the middle of the
                 input line.
               Makefile.in
                 On systems that don't support shared libraries, the
                 distclean target of make deleted libtecla.h. This has
                 now been fixed.
               getline.c
                 gl_change_terminal() was being called by gl_change_editor(),
                 with the unwanted side effect that raw terminal modes were
                 stored as those to be restored later, if called by an
                 action function. gl_change_terminal() was being called in
                 this case to re-establish terminal-specific key bindings,
                 so I have just split this part of the function out into
                 a separate function for both gl_change_editor() and
                 gl_change_terminal() to call.

    12/06/2001 mcs@astro.caltech.edu

               getline.c
                 Signal handling has been improved. Many more signals are
                 now trapped, and instead of using a simple flag set by a
                 signal handler, race conditions are avoided by blocking
                 signals during most of the gl_get_line() code, and
                 unblocking them via calls to sigsetjmp(), just before
                 attempting to read each new character from the user.
                 The matching use of siglongjmp() in the signal
                 handlers ensures that signals are reblocked correctly
                 before they are handled. In most cases, signals cause
                 gl_get_line() to restore the terminal modes and signal
                 handlers of the calling application, then resend the
                 signal to the application. In the case of SIGINT, SIGHUP,
                 SIGPIPE, and SIGQUIT, if the process still exists after
                 the signals are resent, gl_get_line() immediately returns
                 with appropriate values assigned to errno. If SIGTSTP,
                 SIGTTIN or SIGTTOU signals are received, the process is
                 suspended. If any other signal is received, and the
                 process continues to exist after the signal is resent to
                 the calling application, line input is resumed after the
                 terminal is put back into raw mode, the gl_get_line()
                 signal handling is restored, and the input line redrawn.
               man/gl_get_line(3)
                 I added a SIGNAL HANDLING section to the gl_get_line()
                 man page, describing the new signal handling features.

    21/05/2001 Version 1.3.2 released.

    21/05/2001 mcs@astro.caltech.edu

               getline.c
                 When vi-replace-char was used to replace the character at
                 the end of the line, it left the cursor one character to
                 its right instead of on top of it. Now rememdied.
               getline.c
                 When undoing, to properly emulate vi, the cursor is now
                 left at the leftmost of the saved and current cursor
                 positions.
               getline.c man3/gl_get_line.3
                 Implemented find-parenthesis (%), delete-to-paren (M-d%),
                 vi-change-to-paren (M-c%), copy-to-paren (M-y%).
               cplfile.c pcache.c
                 In three places I was comparing the last argument of
                 strncmp() to zero instead of the return value of
                 strncmp().

    20/05/2001 mcs@astro.caltech.edu

               getline.c man3/gl_get_line.3
                 Implemented and documented the vi-repeat-change action,
                 bound to the period key. This repeats the last action
                 that modified the input line.

    19/05/2001 mcs@astro.caltech.edu

               man3/gl_get_line.3
                 I documented the new action functions and bindings
                 provided by Tim Eliseo, plus the ring-bell action and
                 the new "nobeep" configuration option.
               getline.c
                 I modified gl_change_editor() to remove and reinstate the
                 terminal settings as well as the default bindings, since
                 these have editor-specific differences. I also modified
                 it to not abort if a key-sequence can't be bound for some
                 reason. This allows the new vi-mode and emacs-mode
                 bindings to be used safely.
               getline.c
                 When the line was re-displayed on receipt of a SIGWINCH
                 signal, the result wasn't visible until the next
                 character was typed, since a call to fflush() was needed.
                 gl_redisplay_line() now calls gl_flush_output() to remedy
                 this.

    17/05/2001 mcs@astro.catlech.edu

               getline.c
                 Under Linux, calling fflush(gl->output_fd) hangs if
                 terminal output has been suspended with ^S. With the
                 tecla library taking responsability for reading the stop
                 and start characters this was a problem, because once
                 hung in fflush(), the keyboard input loop wasn't entered,
                 so the user couldn't type the start character to resume
                 output.  To remedy this, I now have the terminal process
                 these characters, rather than the library.

    12/05/2001 mcs@astro.caltech.edu

               getline.c
                 The literal-next action is now implemented as a single
                 function which reads the next character itself.
                 Previously it just set a flag which effected the
                 interpretation of the next character read by the input
                 loop.
               getline.c
                 Added a ring-bell action function. This is currently
                 unbound to any key by default, but it is used internally,
                 and can be used by users that want to disable any of the
                 default key-bindings.

    12/05/2001 Tim Eliseo    (logged here by mcs)

               getline.c
                 Don't reset gl->number until after calling an action
                 function. By looking at whether gl->number is <0 or
                 not, action functions can then tell whether the count
                 that they were passed was explicitly specified by the
                 user, as opposed to being defaulted to 1.
               getline.c
                 In vi, the position at which input mode is entered
                 acts as a barrier to backward motion for the few
                 backward moving actions that are enabled in input mode.
                 Tim added this barrier to getline.
               getline.c
                 In gl_get_line() after reading an input line, or
                 having the read aborted by a signal, the sig_atomic_t
                 gl_pending_signal was being compared to zero instead
                 of -1 to see if no signals had been received.
                 gl_get_line() will thus have been calling raise(-1),
                 which luckily didn't seem to do anything. Tim also
                 arranged for errno to be set to EINTR when a signal
                 aborts gl_get_line().
               getline.c
                 The test in gl_add_char_to_line() for detecting
                 when overwriting a character with a wider character,
                 had a < where it needed a >. Overwriting with a wider
                 character thus overwrote trailing characters. Tim also
                 removed a redundant copy of the character into the
                 line buffer.
               getline.c
                 gl_cursor_left() and gl->cursor_right() were executing
                 a lot of redundant code, when the existing call to the
                 recently added gl_place_cursor() function, does all that
                 is necessary.
               getline.c
                 Remove redundant code from backward_kill_line() by
                 re-implimenting in terms of gl_place_cursor() and
                 gl_delete_chars().
               getline.c
                 gl_forward_delete_char() now records characters in cut
                 buffer when in vi command mode.
               getline.c
                 In vi mode gl_backward_delete_char() now only deletes
                 up to the point at which input mode was entered. Also
                 gl_delete_chars() restores from the undo buffer when
                 deleting in vi insert mode.
               getline.c
                 Added action functions, vi-delete-goto-column,
                 vi-change-to-bol, vi-change-line, emacs-mode, vi-mode,
                 vi-forward-change-find, vi-backward-change-find,
                 vi-forward-change-to, vi-backward-change-to,
                 vi-change-goto-col, forward-delete-find, backward-delete-find,
                 forward-delete-to, backward-delete-to,
                 delete-refind, delete-invert-refind, forward-copy-find,
                 backward-copy-find, forward-copy-to, backward-copy-to
                 copy-goto-column, copy-rest-of-line, copy-to-bol, copy-line,
                 history-re-search-forward, history-re-search-backward.

    06/05/2001 Version 1.3.1 released.

    03/05/2001 mcs@astro.caltech.edu

               configure.in
                 Old versions of GNU ld don't accept version scripts.
                 Under Linux I thus added a test to try out ld with
                 the --version-script argument to see if it works.
                 If not, version scripts aren't used.
               configure.in
                 My test for versions of Solaris earlier than 7
                 failed when confronted by a three figure version
                 number (2.5.1). Fixed.

    30/04/2001 mcs@astro.caltech.edu

               getline.c
                 In vi mode, history-search-backward and
                 history-search-forward weren't doing anything when
                 invoked at the start of an empty line, whereas
                 they should have acted like up-history and down-history.
               Makefile.in Makefile.rules
                 When shared libraries are being created, the build
                 procedure now arranges for any alternate library
                 links to be created as well, before linking the
                 demos. Without this the demos always linked to the
                 static libraries (which was perfectly ok, but wasn't a
                 good example).
               Makefile.in Makefile.rules
                 On systems on which shared libraries were being created,
                 if there were no alternate list of names, make would
                 abort due to a Bourne shell 'for' statement that didn't
                 have any arguments. Currently there are no systems who's
                 shared library configurations would trigger this
                 problem.
               Makefile.rules
                 The demos now relink to take account of changes to the
                 library.
               configure.in configure
                 When determining whether the reentrant version of the
                 library should be compiled by default, the configure
                 script now attempts to compile a dummy program that
                 includes all of the appropriate system headers and
                 defines _POSIX_C_SOURCE. This should now be a robust test
                 on systems which use C macros to alias these function
                 names to other internal functions.
               configure.in
                 Under Solaris 2.6 and earlier, the curses library is in
                 /usr/ccs/lib. Gcc wasn't finding this. In addition to
                 remedying this, I had to remove "-z text" from
                 LINK_SHARED under Solaris to get it to successfully
                 compile the shared library against the static curses
                 library.
               configure.in
                 Under Linux the -soname directive was being used
                 incorrectly, citing the fully qualified name of the
                 library instead of its major version alias. This will
                 unfortunately mean that binaries linked with the 1.2.3
                 and 1.2.4 versions of the shared library won't use
                 later versions of the library unless relinked.

    30/04/2001 mcs@astro.caltech.edu

               getline.c
                 In gl_get_input_line(), don't redundantly copy the
                 start_line if start_line == gl->line.

    30/04/2001 Version 1.3.0 released.

    28/04/2001 mcs@astro.caltech.edu

               configure.in
                 I removed the --no-undefined directive from the Linux
                 LINK_SHARED command. After recent patches to our RedHat
                 7.0 systems ld started reporting some internal symbols of
                 libc as being undefined.  Using nm on libc indicated that
                 the offending symbols are indeed defined, albeit as
                 "common" symbols, so there appears to be a bug in
                 RedHat's ld. Removing this flag allows the tecla shared
                 library to compile, and programs appear to function fine.
               man3/gl_get_line.3
                 The default key-sequence used to invoke the
                 read-from-file action was incorrectly cited as ^Xi
                 instead of ^X^F.

    26/04/2001 mcs@astro.caltech.edu

               getline.c man3/gl_get_line.3
                 A new vi-style editing mode was added. This involved
                 adding many new action functions, adding support for
                 specifying editing modes in users' ~/.teclarc files,
                 writing a higher level cursor motion function to support
                 the different line-end bounds required in vi command
                 mode, and a few small changes to support the fact that vi
                 has two modes, input mode and command mode with different
                 bindings.

                 When vi editing mode is enabled, any binding that starts
                 with an escape or a meta character, is interpreted as a
                 command-mode binding, and switches the library to vi
                 command mode if not already in that mode. Once in command
                 mode the first character of all keysequences entered
                 until input mode is re-enabled, are quietly coerced to
                 meta characters before being looked up in the key-binding
                 table. So, for example, in the key-binding table, the
                 standard vi command-mode 'w' key, which moves the cursor
                 one word to the right, is represented by M-w. This
                 emulates vi's dual sets of bindings in a natural way
                 without needing large changes to the library, or new
                 binding syntaxes. Since cursor keys normally emit
                 keysequences which start with escape, it also does
                 something sensible when a cursor key is pressed during
                 input mode (unlike true vi, which gets upset).

                 I also added a ^Xg binding for the new list-glob action
                 to both the emacs and vi key-binding tables. This lists
                 the files that match the wild-card expression that
                 precedes it on the command line.

                 The function that reads in ~/.teclarc used to tell
                 new_GetLine() to abort if it encountered anything that it
                 didn't understand in this file. It now just reports an
                 error and continues onto the next line.
               Makefile.in:
                 When passing LIBS=$(LIBS) to recursive invokations of
                 make, quotes weren't included around the $(LIBS) part.
                 This would cause problems if LIBS ever contained more
                 than one word (with the supplied configure script this
                 doesn't happen currently). I added these quotes.
               expand.c man3/ef_expand_file.3:
                 I wrote a new public function called ef_list_expansions(),
                 to list the matching filenames returned by
                 ef_expand_file().

                 I also fixed the example in the man page, which cited
                 exp->file instead of exp->files, and changed the
                 dangerous name 'exp' with 'expn'.
               keytab.c:
                 Key-binding tables start with 100 elements, and are
                 supposedly incremented in size by 100 elements whenever
                 the a table runs out of space. The realloc arguments to
                 do this were wrong. This would have caused problems if
                 anybody added a lot of personal bindings in their
                 ~/.teclarc file. I only noticed it because the number of
                 key bindings needed by the new vi mode exceeded this
                 number.
               libtecla.map
                 ef_expand_file() is now reported as having been added in
                 the upcoming 1.3.0 release.

    25/03/2001 Markus Gyger  (logged here by mcs)

               Makefile.in:
                 Make symbolic links to alternative shared library names
                 relative instead of absolute.
               Makefile.rules:
                 The HP-UX libtecla.map.opt file should be made in the
                 compilation directory, to allow the source code directory
                 to be on a readonly filesystem.
               cplmatch.c demo2.c history.c pcache.c
                 To allow the library to be compiled with a C++ compiler,
                 without generating warnings, a few casts were added where
                 void* return values were being assigned directly to
                 none void* pointer variables.

    25/03/2001 mcs@astro.caltech.edu

               libtecla.map:
                 Added comment header to explain the purpose of the file.
                 Also added cpl_init_FileArgs to the list of exported
                 symbols. This symbol is deprecated, and no longer
                 documented, but for backwards compatibility, it should
                 still be exported.
               configure:
                 I had forgotten to run autoconf before releasing version
                 1.2.4, so I have just belatedly done so.  This enables
                 Markus' changes to "configure.in" documented previously,
                 (see 17/03/2001).

    20/03/2001 John Levon   (logged here by mcs)

               libtecla.h
                 A couple of the function prototypes in libtecla.h have
                 (FILE *) argument declarations, which means that stdio.h
                 needs to be included. The header file should be self
                 contained, so libtecla.h now includes stdio.h.

    18/03/2001 Version 1.2.4 released.

               README html/index.html configure.in
                 Incremented minor version from 3 to 4.

    18/03/2001 mcs@astro.caltech.edu

               getline.c
                 The fix for the end-of-line problem that I released a
                 couple of weeks ago, only worked for the first line,
                 because I was handling this case when the cursor position
                 was equal to the last column, rather than when the cursor
                 position modulo ncolumn was zero.
               Makefile.in Makefile.rules
                 The demos are now made by default, their rules now being
                 int Makefile.rules instead of Makefile.in.
               INSTALL
                 I documented how to compile the library in a different
                 directory than the distribution directory.
                 I also documented features designed to facilitate
                 configuring and building the library as part of another
                 package.

    17/03/2001 Markus Gyger (logged here by mcs)

               getline.c
                 Until now cursor motions were done one at a time. Markus
                 has added code to make use the of the terminfo capability
                 that moves the cursor by more than one position at a
                 time. This greatly improves performance when editing near
                 the start of long lines.
               getline.c
                 To further improve performance, Markus switched from
                 writing one character at a time to the terminal, using
                 the write() system call, to using C buffered output
                 streams. The output buffer is only flushed when
                 necessary.
               Makefile.rules Makefile.in configure.in
                 Added support for compiling for different architectures
                 in different directories. Simply create another directory
                 and run the configure script located in the original
                 directory.
               Makefile.in configure.in libtecla.map
                 Under Solaris, Linux and HP-UX, symbols that are to be
                 exported by tecla shared libraries are explicitly specified
                 via symbol map files. Only publicly documented functions
                 are thus visible to applications.
               configure.in
                 When linking shared libraries under Solaris SPARC,
                 registers that are reserved for applications are marked
                 as off limits to the library, using -xregs=no%appl when
                 compiling with Sun cc, or -mno-app-regs when compiling
                 with gcc. Also removed -z redlocsym for Solaris, which
                 caused problems under some releases of ld.
               homedir.c  (after minor changes by mcs)
                 Under ksh, ~+ expands to the current value of the ksh
                 PWD environment variable, which contains the path of
                 the current working directory, including any symbolic
                 links that were traversed to get there. The special
                 username "+" is now treated equally by tecla, except
                 that it substitutes the return value of getcwd() if PWD
                 either isn't set, or if it points at a different
                 directory than that reported by getcwd().

    08/03/2001 Version 1.2.3 released.

    08/03/2001 mcs@astro.caltech.edu

               getline.c
                 On compiling the library under HP-UX for the first time
                 I encountered and fixed a couple of bugs:

                 1. On all systems except Solaris, the callback function
                    required by tputs() takes an int argument for the
                    character that is to be printed. Under Solaris it
                    takes a char argument. The callback function was
                    passing this argument, regardless of type, to write(),
                    which wrote the first byte of the argument.  This was
                    fine under Solaris and under little-endian systems,
                    because the first byte contained the character to be
                    written, but on big-endian systems, it always wrote
                    the zero byte at the other end of the word. As a
                    result, no control characters were being written to
                    the terminal.
                 2. While attempting to start a newline after the user hit
                    enter, the library was outputting the control sequence
                    for moving the cursor down, instead of the newline
                    character. On many systems the control sequence for
                    moving the cursor down happends to be a newline
                    character, but under HP-UX it isn't. The result was
                    that no new line was being started under HP-UX.

    04/03/2001 mcs@astro.caltech.edu

               configure.in Makefile.in Makefile.stub configure config.guess
               config.sub Makefile.rules install-sh PORTING README INSTALL
                 Configuration and compilation of the library is now
                 performed with the help of an autoconf configure
                 script. In addition to relieving the user of the need to
                 edit the Makefile, this also allows automatic compilation
                 of the reentrant version of the library on platforms that
                 can handle it, along with the creation of shared
                 libraries where configured. On systems that aren't known
                 to the configure script, just the static tecla library is
                 compiled. This is currently the case on all systems
                 except Linux, Solaris and HP-UX. In the hope that
                 installers will provide specific conigurations for other
                 systems, the configure.in script is heavily commented,
                 and instructions on how to use are included in a new
                 PORTING file.

    24/02/2001 Version 1.2b released.

    22/02/2001 mcs@astro.caltech.edu

               getline.c
                 It turns out that most terminals, but not all, on writing
                 a character in the rightmost column, don't wrap the
                 cursor onto the next line until the next character is
                 output. This library wasn't aware of this and thus if one
                 tried to reposition the cursor from the last column,
                 gl_get_line() thought that it was moving relative to a
                 point on the next line, and thus moved the cursor up a
                 line. The fix was to write one extra character when in
                 the last column to force the cursor onto the next line,
                 then backup the cursor to the start of the new line.
               getline.c
                 On terminal initialization, the dynamic LINES and COLUMNS
                 environment variables were ignored unless
                 terminfo/termcap didn't return sensible dimensions. In
                 practice, when present they should override the static
                 versions in the terminfo/termcap databases. This is the
                 new behavior. In reality this probably won't have caused
                 many problems, because a SIGWINCH signal which informs of
                 terminal size changes is sent when the terminal is
                 opened, so the dimensions established during
                 initialization quickly get updated on most systems.

    18/02/2001 Version 1.2a released.

    18/02/2001 mcs@astro.caltech.edu

               getline.c
                 Three months ago I moved the point at which termios.h
                 was included in getline.c. Unfortunately, I didn't notice
                 that this moved it to after the test for TIOCGWINSZ being
                 defined. This resulted in SIGWINCH signals not being
                 trapped for, and thus terminal size changes went
                 unnoticed. I have now moved the test to after the
                 inclusion of termios.h.

    12/02/2001 Markus Gyger     (described here by mcs)

               man3/pca_lookup_file.3 man3/gl_get_line.3
               man3/ef_expand_file.3 man3/cpl_complete_word.3
                 In the 1.2 release of the library, all functions in the
                 library were given man pages. Most of these simply
                 include one of the above 4 man pages, which describe the
                 functions while describing the modules that they are in.
                 Markus added all of these function names to the lists in
                 the "NAME" headers of the respective man pages.
                 Previously only the primary function of each module was
                 named there.

    11/02/2001 mcs@astro.caltech.edu

               getline.c
                 On entering a line that wrapped over two or more
                 terminal, if the user pressed enter when the cursor
                 wasn't on the last of the wrapped lines, the text of the
                 wrapped lines that followed it got mixed up with the next
                 line written by the application, or the next input
                 line. Somehow this slipped through the cracks and wasn't
                 noticed until now. Anyway, it is fixed now.

    09/02/2001 Version 1.2 released.

    04/02/2001 mcs@astro.caltech.edu

               pcache.c libtecla.h
                 With all filesystems local, demo2 was very fast to start
                 up, but on a Sun system with one of the target
                 directories being on a remote nfs mounted filesystem, the
                 startup time was many seconds. This was due to the
                 executable selection callback being applied to all files
                 in the path at startup. To avoid this, all files are now
                 included in the cache, and the application specified
                 file-selection callback is only called on files as they
                 are matched. Whether the callback rejected or accepted
                 them is then cached so that the next time an already
                 checked file is looked at, the callback doesn't have to
                 be called. As a result, startup is now fast on all
                 systems, and since usually there are only a few matching
                 file completions at a time, the delay during completion
                 is also usually small. The only exception is if the user
                 tries to complete an empty string, at which point all
                 files have to be checked. Having done this once, however,
                 doing it again is fast.
               man3/pca_lookup_file.3
                 I added a man page documenting the new PathCache module.
               man3/.3
                 I have added man pages for all of the functions in each
                 of the modules. These 1-line pages use the .so directive
                 to redirect nroff to the man page of the parent module.
               man Makefile update_html
                 I renamed man to man3 to make it easier to test man page
                 rediction, and updated Makefile and update_html
                 accordingly. I also instructed update_html to ignore
                 1-line man pages when making html equivalents of the man
                 pages.
               cplmatch.c
                 In cpl_list_completions() the size_t return value of
                 strlen() was being used as the length argument of a "%*s"
                 printf directive. This ought to be an int, so the return
                 value of strlen() is now cast to int. This would have
                 caused problems on architectures where the size of a
                 size_t is not equal to the size of an int.

    02/02/2001 mcs@astro.caltech.edu

               getline.c
                 Under UNIX, certain terminal bindings are set using the
                 stty command. This, for example, specifies which control
                 key generates a user-interrupt (usually ^C or ^Y). What I
                 hadn't realized was that ASCII NUL is used as the way to
                 specify that one of these bindings is unset. I have now
                 modified the code to skip unset bindings, leaving the
                 corresponding action bound to the built-in default, or a
                 user provided binding.

    28/01/2001 mcs@astro.caltech.edu

               pcache.c libtecla.h
                 A new module was added which supports searching for files
                 in any colon separated list of directories, such as the
                 unix execution PATH environment variable. Files in these
                 directories, after being individually okayed for
                 inclusion via an application provided callback, are
                 cached in a PathCache object. You can then look up the
                 full pathname of a given filename, or you can use the
                 provided completion callback to list possible completions
                 in the path-list. The contents of relative directories,
                 such as ".", obviously can't be cached, so these
                 directories are read on the fly during lookups and
                 completions. The obvious application of this facility is
                 to provide Tab-completion of commands, and thus a
                 callback to place executable files in the cache, is
                 provided.
               demo2.c
                 This new program demonstrates the new PathCache
                 module. It reads and processes lines of input until the
                 word 'exit' is entered, or C-d is pressed. The default
                 tab-completion callback is replaced with one which at the
                 start of a line, looks up completions of commands in the
                 user's execution path, and when invoked in other parts of
                 the line, reverts to normal filename completion. Whenever
                 a new line is entered, it extracts the first word on the
                 line, looks it up in the user's execution path to see if
                 it corresponds to a known command file, and if so,
                 displays the full pathname of the file, along with the
                 remaining arguments.
               cplfile.c
                 I added an optional pair of callback function/data
                 members to the new cpl_file_completions() configuration
                 structure. Where provided, this callback is asked
                 on a file-by-file basis, which files should be included
                 in the list of file completions. For example, a callback
                 is provided for listing only completions of executable
                 files.
               cplmatch.c
                 When listing completions, the length of the type suffix
                 of each completion wasn't being taken into account
                 correctly when computing the column widths. Thus the
                 listing appeared ragged sometimes. This is now fixed.
               pathutil.c
                 I added a function for prepending a string to a path,
                 and another for testing whether a pathname referred to
                 an executable file.

    28/01/2001 mcs@astro.caltech.edu

               libtecla.h cplmatch.c man/cpl_complete_word.3
                 The use of a publically defined structure to configure
                 the cpl_file_completions() callback was flawed, so a new
                 approach has been designed, and the old method, albeit
                 still supported, is no longer documented in the man
                 pages. The definition of the CplFileArgs structure in
                 libtecla.h is now accompanied by comments warning people
                 not to modify it, since modifications could break
                 applications linked to shared versions of the tecla
                 library. The new method involves an opaque CplFileConf
                 object, instances of which are returned by a provided
                 constructor function, configured with provided accessor
                 functions, and when no longer needed, deleted with a
                 provided destructor function. This is documented in the
                 cpl_complete_word man page. The cpl_file_completions()
                 callback distinguishes what type of configuration
                 structure it has been sent by virtue of a code placed at
                 the beginning of the CplFileConf argument by its
                 constructor.

    04/01/2001 mcs@astro.caltech.edu (Release of version 1.1j)

               getline.c
                 I added upper-case bindings for the default meta-letter
                 keysequences such as M-b. They thus continue to work
                 when the user has caps-lock on.
               Makefile
                 I re-implemented the "install" target in terms of new
                 install_lib, install_inc and install_man targets. When
                 distributing the library with other packages, these new
                 targets allows for finer grained control of the
                 installation process.

    30/12/2000 mcs@astro.caltech.edu

               getline.c man/gl_get_line.3
                 I realized that the recall-history action that I
                 implemented wasn't what Markus had asked me for. What he
                 actually wanted was for down-history to continue going
                 forwards through a previous history recall session if no
                 history recall session had been started while entering
                 the current line. I have thus removed the recall-history
                 action and modified the down-history action function
                 accordingly.

    24/12/2000 mcs@astro.caltech.edu

               getline.c
                 I modified gl_get_line() to allow the previously returned
                 line to be passed in the start_line argument.
               getline.c man/gl_get_line.3
                 I added a recall-history action function, bound to M^P.
                 This recalls the last recalled history line, regardless
                 of whether it was from the current or previous line.

    13/12/2000 mcs@astro.caltech.edu (Release of version 1.1i)

               getline.c history.h history.c man/gl_get_line.3
                 I implemented the equivalent of the ksh Operate action. I
                 have named the tecla equivalent "repeat-history". This
                 causes the line that is to be edited to returned, and
                 arranges for the next most recent history line to be
                 preloaded on the next call to gl_get_line(). Repeated
                 invocations of this action thus result in successive
                 history lines being repeated - hence the
                 name. Implementing the ksh Operate action was suggested
                 by Markus Gyger. In ksh it is bound to ^O, but since ^O
                 is traditionally bound by the default terminal settings,
                 to stop-output, I have bound the tecla equivalent to M-o.

    01/12/2000 mcs@astro.caltech.edu (Release of version 1.1h)

               getline.c keytab.c keytab.h man/gl_get_line.3
                 I added a digit-argument action, to allow repeat
                 counts for actions to be entered. As in both tcsh
                 and readline, this is bound by default to each of
                 M-0, M-1 through to M-9, the number being appended
                 to the current repeat count. Once one of these has been
                 pressed, the subsequent digits of the repeat count can be
                 typed with or without the meta key pressed. It is also
                 possible to bind digit-argument to other keys, with or
                 without a numeric final keystroke. See man page for
                 details.

               getline.c man/gl_get_line.3
                 Markus noted that my choice of M-< for the default
                 binding of read-from-file, could be confusing, since
                 readline binds this to beginning-of-history. I have
                 thus rebound it to ^X^F (ie. like find-file in emacs).

               getline.c history.c history.h man/gl_get_line.3
                 I have now implemented equivalents of the readline
                 beginning-of-history and end-of-history actions.
                 These are bound to M-< and M-> respectively.

               history.c history.h
                 I Moved the definition of the GlHistory type, and
                 its subordinate types from history.h to history.c.
                 There is no good reason for any other module to
                 have access to the innards of this structure.

    27/11/2000 mcs@astro.caltech.edu (Release of version 1.1g)

               getline.c man/gl_get_line.3
                 I added a "read-from-file" action function and bound it
                 by default to M-<. This causes gl_get_line() to
                 temporarily return input from the file who's name
                 precedes the cursor.

    26/11/2000 mcs@astro.caltech.edu

               getline.c keytab.c keytab.h man/gl_get_line.3
                 I have reworked some of the keybinding code again.

                 Now, within key binding strings, in addition to the
                 previously existing notation, you can now use M-a to
                 denote meta-a, and C-a to denote control-a. For example,
                 a key binding which triggers when the user presses the
                 meta key, the control key and the letter [
                 simultaneously, can now be denoted by M-C-[, or M-^[ or
                 \EC-[ or \E^[.

                 I also updated the man page to use M- instead of \E in
                 the list of default bindings, since this looks cleaner.

               getline.c man/gl_get_line.3
                 I added a copy-region-as-kill action function and
                 gave it a default binding to M-w.

    22/11/2000 mcs@astro.caltech.edu

               *.c
                 Markus Gyger sent me a copy of a previous version of
                 the library, with const qualifiers added in appropriate
                 places. I have done the same for the latest version.
                 Among other things, this gets rid of the warnings
                 that are generated if one tells the compiler to
                 const qualify literal strings.

               getline.c getline.h glconf.c
                 I have moved the contents of glconf.c and the declaration
                 of the GetLine structure into getline.c. This is cleaner,
                 since now only functions in getline.c can mess with the
                 innards of GetLine objects. It also clears up some problems
                 with system header inclusion order under Solaris, and also
                 the possibility that this might result in inconsistent
                 system macro definitions, which in turn could cause different
                 declarations of the structure to be seen in different files.

               hash.c
                 I wrote a wrapper function to go around strcmp(), such that
                 when hash.c is compiled with a C++ compiler, the pointer
                 to the wrapper function is a C++ function pointer.
                 This makes it compatible with comparison function pointer
                 recorded in the hash table.

               cplmatch.c getline.c libtecla.h
                 Markus noted that the Sun C++ compiler wasn't able to
                 match up the declaration of cpl_complete_word() in
                 libtecla.h, where it is surrounded by a extern "C" {}
                 wrapper, with the definition of this function in
                 cplmatch.c. My suspicion is that the compiler looks not
                 only at the function name, but also at the function
                 arguments to see if two functions match, and that the
                 match_fn() argument, being a fully blown function pointer
                 declaration, got interpetted as that of a C function in
                 one case, and a C++ function in the other, thus
                 preventing a match.

                 To fix this I now define a CplMatchFn typedef in libtecla.h,
                 and use this to declare the match_fn callback.

    20/11/2000 (Changes suggested by Markus Gyger to support C++ compilers):
               expand.c
                 Renamed a variable called "explicit" to "xplicit", to
                 avoid conflicts when compiling with C++ compilers.
               *.c
                 Added explicit casts when converting from (void *) to
                 other pointer types. This isn't needed in C but it is
                 in C++.
               getline.c
                 tputs() has a strange declaration under Solaris. I was
                 enabling this declaration when the SPARC feature-test
                 macro was set. Markus changed the test to hinge on the
                 __sun and __SVR4 macros.
               direader.c glconf.c stringrp.c
                 I had omitted to include string.h in these two files.

               Markus also suggested some other changes, which are still
               under discussion. With the just above changes however, the
               library compiles without complaint using g++.

    19/11/2000 mcs@astro.caltech.edu
               getline.h getline.c keytab.c keytab.h glconf.c
               man/gl_get_line.3
                 I added support for backslash escapes (include \e
                 for the keyboard escape key) and literal binary
                 characters to the characters allowed within key sequences
                 of key bindings.

               getline.h getline.c keytab.c keytab.h glconf.c
               man/gl_get_line.3
                 I introduced symbolic names for the arrow keys, and
                 modified the library to use the cursor key sequences
                 reported by terminfo/termcap in addition to the default
                 ANSI ones. Anything bound to the symbolically named arrow
                 keys also gets bound to the default and terminfo/termcap
                 cursor key sequences. Note that under Solaris
                 terminfo/termcap report the properties of hardware X
                 terminals when TERM is xterm instead of the terminal
                 emulator properties, and the cursor keys on these two
                 systems generate different key sequences. This is an
                 example of why extra default sequences are needed.

               getline.h getline.c keytab.c
                 For some reason I was using \e to represent the escape
                 character. This is supported by gcc, which thus doesn't
                 emit a warning except with the -pedantic flag, but isn't
                 part of standard C. I now use a macro to define escape
                 as \033 in getline.h, and this is now used wherever the
                 escape character is needed.

    17/11/2000 mcs@astro.caltech.edu (Release of version 1.1d)

               getline.c, man/gl_get_line(3), html/gl_get_line.html
                 In tcsh ^D is bound to a function which does different
                 things depending on where the cursor is within the input
                 line. I have implemented its equivalent in the tecla
                 library. When invoked at the end of the line this action
                 function displays possible completions. When invoked on
                 an empty line it causes gl_get_line() to return NULL,
                 thus signalling end of input. When invoked within a line
                 it invokes forward-delete-char, as before. The new action
                 function is called del-char-or-list-or-eof.

               getline.c, man/gl_get_line(3), html/gl_get_line.html
                 I found that the complete-word and expand-file actions
                 had underscores in their names instead of hyphens. This
                 made them different from all other action functions, so I
                 have changed the underscores to hyphens.

               homedir.c
                 On SCO UnixWare while getpwuid_r() is available, the
                 associated _SC_GETPW_R_SIZE_MAX macro used by sysconf()
                 to find out how big to make the buffer to pass to this
                 function to cater for any password entry, doesn't
                 exist. I also hadn't catered for the case where sysconf()
                 reports that this limit is indeterminate. I have thus
                 change the code to substitute a default limit of 1024 if
                 either the above macro isn't defined or if sysconf() says
                 that the associated limit is indeterminate.

    17/11/2000 mcs@astro.caltech.edu (Release of version 1.1c)

               getline.c, getline.h, history.c, history.h
                 I have modified the way that the history recall functions
                 operate, to make them better emulate the behavior of
                 tcsh. Previously the history search bindings always
                 searched for the prefix that preceded the cursor, then
                 left the cursor at the same point in the line, so that a
                 following search would search using the same prefix. This
                 isn't how tcsh operates. On finding a matching line, tcsh
                 puts the cursor at the end of the line, but arranges for
                 the followup search to continue with the same prefix,
                 unless the user does any cursor motion or character
                 insertion operations in between, in which case it changes
                 the search prefix to the new set of characters that are
                 before the cursor. There are other complications as well,
                 which I have attempted to emulate. As far as I can
                 tell, the tecla history recall facilities now fully
                 emulate those of tcsh.

    16/11/2000 mcs@astro.caltech.edu (Release of version 1.1b)

               demo.c:
                 One can now quit from the demo by typing exit.

               keytab.c:
                 The first entry of the table was getting deleted
                 by _kt_clear_bindings() regardless of the source
                 of the binding. This deleted the up-arrow binding.
                 Symptoms noted by gazelle@yin.interaccess.com.

               getline.h:
                 Depending on which system include files were include
                 before the inclusion of getline.h, SIGWINCH and
                 TIOCGWINSZ might or might not be defined. This resulted
                 in different definitions of the GetLine object in
                 different files, and thus some very strange bugs! I have
                 now added #includes for the necessary system header files
                 in getline.h itself. The symptom was that on creating a
                 ~/.teclarc file, the demo program complained of a NULL
                 argument to kt_set_keybinding() for the first line of the
                 file.

    15/11/2000 mcs@astro.caltech.edu (Release of version 1.1a)

               demo.c:
                 I had neglected to check the return value of
                 new_GetLine() in the demo program. Oops.

               getline.c libtecla.h:
                 I wrote gl_change_terminal(). This allows one to change to
                 a different terminal or I/O stream, by specifying the
                 stdio streams to use for input and output, along with the
                 type of terminal that they are connected to.

               getline.c libtecla.h:
                 Renamed GetLine::isterm to GetLine::is_term. Standard
                 C reserves names that start with "is" followed by
                 alphanumeric characters, so this avoids potential
                 clashes in the future.

               keytab.c keytab.h
                 Each key-sequence can now have different binding
                 functions from different sources, with the user provided
                 binding having the highest precedence, followed by the
                 default binding, followed by any terminal specific
                 binding. This allows gl_change_terminal() to redefine the
                 terminal-specific bindings each time that
                 gl_change_terminal() is called, without overwriting the
                 user specified or default bindings. In the future, it will
                 also allow for reconfiguration of user specified
                 bindings after the call to new_GetLine(). Ie. deleting a
                 user specified binding should reinstate any default or
                 terminal specific binding.

               man/cpl_complete_word.3 html/cpl_complete_word.html
               man/ef_expand_file.3    html/ef_expand_file.html
               man/gl_get_line.3       html/gl_get_line.html
                 I added sections on thread safety to the man pages of the
                 individual modules.

               man/gl_get_line.3       html/gl_get_line.html
                 I documented the new gl_change_terminal() function.

               man/gl_get_line.3       html/gl_get_line.html
                 In the description of the ~/.teclarc configuration file,
                 I had omitted the 'bind' command word in the example
                 entry. I have now remedied this.