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This document details the changes between this version, readline-4.1,
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and the previous version, readline-4.0.
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4
1.  Changes to Readline
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a.  Changed the HTML documents so that the table-of-contents is no longer
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    a separate file.
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b.  Changes to the shared object configuration for: Irix 5.x, Irix 6.x,
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    OSF/1.
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c.  The shared library major and minor versions are now constructed
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    automatically by configure and substituted into the makefiles.
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d.  It's now possible to install the shared libraries separately from the
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    static libraries.
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e.  The history library tries to truncate the history file only if it is a
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    regular file.
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f.  A bug that caused _rl_dispatch to address negative array indices on
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    systems with signed chars was fixed.
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g.  rl-yank-nth-arg now leaves the history position the same as when it was
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    called.
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h.  Changes to the completion code to handle MS-DOS drive-letter:pathname
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    filenames.
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i.  Completion is now case-insensitive by default on MS-DOS.
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j.  Fixes to the history file manipulation code for MS-DOS.
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k.  Readline attempts to bind the arrow keys to appropriate defaults on MS-DOS.
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l.  Some fixes were made to the redisplay code for better operation on MS-DOS.
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m.  The quoted-insert code will now insert tty special chars like ^C.
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n.  A bug was fixed that caused the display code to reference memory before
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    the start of the prompt string.
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o.  More support for __EMX__ (OS/2).
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p.  A bug was fixed in readline's signal handling that could cause infinite
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    recursion in signal handlers.
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q.  A bug was fixed that caused the point to be less than zero when rl_forward
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    was given a very large numeric argument.
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r.  The vi-mode code now gets characters via the application-settable value
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    of rl_getc_function rather than calling rl_getc directly.
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s.  The history file code now uses O_BINARY mode when reading and writing
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    the history file on cygwin32.
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57
t.  Fixed a bug in the redisplay code for lines with more than 256 line
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    breaks.
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60
u.  A bug was fixed which caused invisible character markers to not be
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    stripped from the prompt string if the terminal was in no-echo mode.
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v.  Readline no longer tries to get the variables it needs for redisplay
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    from the termcap entry if the calling application has specified its
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    own redisplay function.  Readline treats the terminal as `dumb' in
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    this case.
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w.  Fixes to the SIGWINCH code so that a multiple-line prompt with escape
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    sequences is redrawn correctly.
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x.  Changes to the install and install-shared targets so that the libraries
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    and header files are installed separately.
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2.  New Features in Readline
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a.  A new Readline `user manual' is in doc/rluserman.texinfo.
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b.  Parentheses matching is now always compiled into readline, and enabled
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    or disabled when the value of the `blink-matching-paren' variable is
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    changed.
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c.  MS-DOS systems now use ~/_inputrc as the last-ditch inputrc filename.
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d.  MS-DOS systems now use ~/_history as the default history file.
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e.  history-search-{forward,backward} now leave the point at the end of the
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    line when the string to search for is empty, like
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    {reverse,forward}-search-history.
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90
f.  history-search-{forward,backward} now leave the last history line found
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    in the readline buffer if the second or subsequent search fails.
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g.  New function for use by applications:  rl_on_new_line_with_prompt, used
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    when an application displays the prompt itself before calling readline().
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h.  New variable for use by applications:  rl_already_prompted.  An application
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    that displays the prompt itself before calling readline() must set this to
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    a non-zero value.
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i.  A new variable, rl_gnu_readline_p, always 1.  The intent is that an
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    application can verify whether or not it is linked with the `real'
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    readline library or some substitute.
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j.  Per Bothner's `rlfe' (pronounced `Ralphie') readline front-end program
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    is included in the examples subdirectory, though it is not built
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    by default.
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-------------------------------------------------------------------------------
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This document details the changes between this version, readline-4.0,
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and the previous version, readline-2.2.
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112
1.  Changes to Readline
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a.  The version number is now 4.0, to match the major and minor version
115
    numbers on the shared readline and history libraries.  Future
116
    releases will maintain the identical numbering.
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118
b.  Fixed a typo in the `make install' recipe that copied libreadline.a
119
    to libhistory.old right after installing it.
120
 
121
c.  The readline and history info files are now installed out of the source
122
    directory if they are not found in the build directory.
123
 
124
d.  The library no longer exports a function named `savestring' -- backwards
125
    compatibility be damned.
126
 
127
e.  There is no longer any #ifdef SHELL code in the source files.
128
 
129
f.  Some changes were made to the key binding code to fix memory leaks and
130
    better support Win32 systems.
131
 
132
g.  Fixed a silly typo in the paren matching code -- it's microseconds, not
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    milliseconds.
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135
h.  The readline library should be compilable by C++ compilers.
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137
i.  The readline.h public header file now includes function prototypes for
138
    all readline functions, and some changes were made to fix errors in the
139
    source files uncovered by the use of prototypes.
140
 
141
j.  The maximum numeric argument is now clamped at 1000000.
142
 
143
k.  Fixes to rl_yank_last_arg to make it behave better.
144
 
145
l.  Fixed a bug in the display code that caused core dumps if the prompt
146
    string length exceeded 1024 characters.
147
 
148
m.  The menu completion code was fixed to properly insert a single completion
149
    if there is only one match.
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151
n.  A bug was fixed that caused the display code to improperly display tabs
152
    after newlines.
153
 
154
o.  A fix was made to the completion code in which a typo caused the wrong
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    value to be passed to the function that computed the longest common
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    prefix of the list of matches.
157
 
158
p.  The completion code now checks the value of rl_filename_completion_desired,
159
    which is set by application-supplied completion functions to indicate
160
    that filename completion is being performed, to decide whether or not to
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    call an application-supplied `ignore completions' function.
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q.  Code was added to the history library to catch history substitutions
164
    using `&' without a previous history substitution or search having been
165
    performed.
166
 
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168
2.  New Features in Readline
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170
a.  There is a new script, support/shobj-conf, to do system-specific shared
171
    object and library configuration.  It generates variables for configure
172
    to substitute into makefiles.  The README file provides a detailed
173
    explanation of the shared library creation process.
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b.  Shared libraries and objects are now built in the `shlib' subdirectory.
176
    There is a shlib/Makefile.in to control the build process.  `make shared'
177
    from the top-level directory is still the right way to build shared
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    versions of the libraries.
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180
c.  rlconf.h is now installed, so applications can find out which features
181
    have been compiled into the installed readline and history libraries.
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183
d.  rlstdc.h is now an installed header file.
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e.  Many changes to the signal handling:
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        o Readline now catches SIGQUIT and cleans up the tty before returning;
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        o A new variable, rl_catch_signals, is available to application writers
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          to indicate to readline whether or not it should install its own
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          signal handlers for SIGINT, SIGTERM, SIGQUIT, SIGALRM, SIGTSTP,
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          SIGTTIN, and SIGTTOU;
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        o A new variable, rl_catch_sigwinch, is available to application
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          writers to indicate to readline whether or not it should install its
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          own signal handler for SIGWINCH, which will chain to the calling
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          applications's SIGWINCH handler, if one is installed;
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        o There is a new function, rl_free_line_state, for application signal
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          handlers to call to free up the state associated with the current
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          line after receiving a signal;
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        o There is a new function, rl_cleanup_after_signal, to clean up the
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          display and terminal state after receiving a signal;
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        o There is a new function, rl_reset_after_signal, to reinitialize the
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          terminal and display state after an application signal handler
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          returns and readline continues
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204
f.  There is a new function, rl_resize_terminal, to reset readline's idea of
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    the screen size after a SIGWINCH.
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g.  New public functions: rl_save_prompt and rl_restore_prompt.  These were
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    previously private functions with a `_' prefix.  These functions are
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    used when an application wants to write a message to the `message area'
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    with rl_message and have the prompt restored correctly when the message
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    is erased.
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h.  New function hook: rl_pre_input_hook, called just before readline starts
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    reading input, after initialization.
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i.  New function hook: rl_display_matches_hook, called when readline would
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    display the list of completion matches.  The new function
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    rl_display_match_list is what readline uses internally, and is available
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    for use by application functions called via this hook.
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j.  New bindable function, delete-char-or-list, like tcsh.
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k.  A new variable, rl_erase_empty_line, which, if set by an application using
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    readline, will cause readline to erase, prompt and all, lines on which the
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    only thing typed was a newline.
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l.  There is a new script, support/shlib-install, to install and uninstall
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    the shared readline and history libraries.
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230
m.  A new bindable variable, `isearch-terminators', which is a string
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    containing the set of characters that should terminate an incremental
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    search without being executed as a command.
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n.  A new bindable function, forward-backward-delete-char.
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236
-------------------------------------------------------------------------------
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This document details the changes between this version, readline-2.2,
238
and the previous version, readline-2.1.
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240
1.  Changes to Readline
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242
a.  Added a missing `extern' to a declaration in readline.h that kept
243
    readline from compiling cleanly on some systems.
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245
b.  The history file is now opened with mode 0600 when it is written for
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    better security.
247
 
248
c.  Changes were made to the SIGWINCH handling code so that prompt redisplay
249
    is done better.
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251
d.  ^G now interrupts incremental searches correctly.
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253
e.  A bug that caused a core dump when the set of characters to be quoted
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    when completing words was empty was fixed.
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256
f.  Fixed a problem in the readline test program rltest.c that caused a core
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    dump.
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259
g.  The code that handles parser directives in inputrc files now displays
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    more error messages.
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262
h.  The history expansion code was fixed so that the appearance of the
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    history comment character at the beginning of a word inhibits history
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    expansion for that word and the rest of the input line.
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266
i.  The code that prints completion listings now behaves better if one or
267
    more of the filenames contains non-printable characters.
268
 
269
j.  The time delay when showing matching parentheses is now 0.5 seconds.
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272
2.  New Features in Readline
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274
a.  There is now an option for `iterative' yank-last-arg handline, so a user
275
    can keep entering `M-.', yanking the last argument of successive history
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    lines.
277
 
278
b.  New variable, `print-completions-horizontally', which causes completion
279
    matches to be displayed across the screen (like `ls -x') rather than up
280
    and down the screen (like `ls').
281
 
282
c.  New variable, `completion-ignore-case', which causes filename completion
283
    and matching to be performed case-insensitively.
284
 
285
d.  There is a new bindable command, `magic-space', which causes history
286
    expansion to be performed on the current readline buffer and a space to
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    be inserted into the result.
288
 
289
e.  There is a new bindable command, `menu-complete', which enables tcsh-like
290
    menu completion (successive executions of menu-complete insert a single
291
    completion match, cycling through the list of possible completions).
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293
f.  There is a new bindable command, `paste-from-clipboard', for use on Win32
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    systems, to insert the text from the Win32 clipboard into the editing
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    buffer.
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297
g.  The key sequence translation code now understands printf-style backslash
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    escape sequences, including \NNN octal escapes.  These escape sequences
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    may be used in key sequence definitions or macro values.
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301
h.  An `$include' inputrc file parser directive has been added.

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