diff options
author | cvs2git <rtems-devel@rtems.org> | 2002-07-30 23:06:03 +0000 |
---|---|---|
committer | cvs2git <rtems-devel@rtems.org> | 2002-07-30 23:06:03 +0000 |
commit | eddcad37934ee3dbc8c6c50b55ae3c8c879eb564 (patch) | |
tree | 083bd0a76d5d8e8001d8a0832e4cbf466c93ab94 /readline-4.3/history.c | |
parent | cbc2d8125987241306ba82aa853e3f6bb3069405 (diff) |
This commit was manufactured by cvs2svn to create tag 'rtems-addon-packages-rtems-addon-packages-20020730a
20020730a'.
Sprout from addons 2002-06-28 21:58:41 UTC Eric Norum <WENorum@lbl.gov> 'Useful add-on libraries'
Cherrypick from master 2002-07-30 23:06:02 UTC Joel Sherrill <joel.sherrill@OARcorp.com> '2002-07-30 Joel Sherrill <joel@OARcorp.com>':
ChangeLog
RTEMS_Makefiles/Makefile.readline-4.3
SUPPORT
VERSION
bit
readline-4.3.orig/CHANGELOG
readline-4.3.orig/CHANGES
readline-4.3.orig/COPYING
readline-4.3.orig/INSTALL
readline-4.3.orig/MANIFEST
readline-4.3.orig/Makefile.in
readline-4.3.orig/README
readline-4.3.orig/USAGE
readline-4.3.orig/aclocal.m4
readline-4.3.orig/ansi_stdlib.h
readline-4.3.orig/bind.c
readline-4.3.orig/callback.c
readline-4.3.orig/chardefs.h
readline-4.3.orig/compat.c
readline-4.3.orig/complete.c
readline-4.3.orig/config.h.in
readline-4.3.orig/configure
readline-4.3.orig/configure.in
readline-4.3.orig/display.c
readline-4.3.orig/doc/Makefile.in
readline-4.3.orig/doc/hist.texinfo
readline-4.3.orig/doc/history.0
readline-4.3.orig/doc/history.3
readline-4.3.orig/doc/history.dvi
readline-4.3.orig/doc/history.html
readline-4.3.orig/doc/history.info
readline-4.3.orig/doc/history.ps
readline-4.3.orig/doc/history_3.ps
readline-4.3.orig/doc/hstech.texinfo
readline-4.3.orig/doc/hsuser.texinfo
readline-4.3.orig/doc/manvers.texinfo
readline-4.3.orig/doc/readline.0
readline-4.3.orig/doc/readline.3
readline-4.3.orig/doc/readline.dvi
readline-4.3.orig/doc/readline.html
readline-4.3.orig/doc/readline.info
readline-4.3.orig/doc/readline.ps
readline-4.3.orig/doc/readline_3.ps
readline-4.3.orig/doc/rlman.texinfo
readline-4.3.orig/doc/rltech.texinfo
readline-4.3.orig/doc/rluser.texinfo
readline-4.3.orig/doc/rluserman.dvi
readline-4.3.orig/doc/rluserman.html
readline-4.3.orig/doc/rluserman.info
readline-4.3.orig/doc/rluserman.ps
readline-4.3.orig/doc/rluserman.texinfo
readline-4.3.orig/doc/texi2dvi
readline-4.3.orig/doc/texi2html
readline-4.3.orig/doc/texinfo.tex
readline-4.3.orig/emacs_keymap.c
readline-4.3.orig/examples/Inputrc
readline-4.3.orig/examples/Makefile.in
readline-4.3.orig/examples/excallback.c
readline-4.3.orig/examples/fileman.c
readline-4.3.orig/examples/histexamp.c
readline-4.3.orig/examples/manexamp.c
readline-4.3.orig/examples/readlinebuf.h
readline-4.3.orig/examples/rl.c
readline-4.3.orig/examples/rlcat.c
readline-4.3.orig/examples/rlfe.c
readline-4.3.orig/examples/rltest.c
readline-4.3.orig/examples/rlversion.c
readline-4.3.orig/funmap.c
readline-4.3.orig/histexpand.c
readline-4.3.orig/histfile.c
readline-4.3.orig/histlib.h
readline-4.3.orig/history.c
readline-4.3.orig/history.h
readline-4.3.orig/histsearch.c
readline-4.3.orig/input.c
readline-4.3.orig/isearch.c
readline-4.3.orig/keymaps.c
readline-4.3.orig/keymaps.h
readline-4.3.orig/kill.c
readline-4.3.orig/macro.c
readline-4.3.orig/mbutil.c
readline-4.3.orig/misc.c
readline-4.3.orig/nls.c
readline-4.3.orig/parens.c
readline-4.3.orig/posixdir.h
readline-4.3.orig/posixjmp.h
readline-4.3.orig/posixstat.h
readline-4.3.orig/readline.c
readline-4.3.orig/readline.h
readline-4.3.orig/rlconf.h
readline-4.3.orig/rldefs.h
readline-4.3.orig/rlmbutil.h
readline-4.3.orig/rlprivate.h
readline-4.3.orig/rlshell.h
readline-4.3.orig/rlstdc.h
readline-4.3.orig/rltty.c
readline-4.3.orig/rltty.h
readline-4.3.orig/rltypedefs.h
readline-4.3.orig/rlwinsize.h
readline-4.3.orig/savestring.c
readline-4.3.orig/search.c
readline-4.3.orig/shell.c
readline-4.3.orig/shlib/Makefile.in
readline-4.3.orig/signals.c
readline-4.3.orig/support/config.guess
readline-4.3.orig/support/config.sub
readline-4.3.orig/support/install.sh
readline-4.3.orig/support/mkdirs
readline-4.3.orig/support/mkdist
readline-4.3.orig/support/shlib-install
readline-4.3.orig/support/shobj-conf
readline-4.3.orig/support/wcwidth.c
readline-4.3.orig/tcap.h
readline-4.3.orig/terminal.c
readline-4.3.orig/text.c
readline-4.3.orig/tilde.c
readline-4.3.orig/tilde.h
readline-4.3.orig/undo.c
readline-4.3.orig/util.c
readline-4.3.orig/vi_keymap.c
readline-4.3.orig/vi_mode.c
readline-4.3.orig/xmalloc.c
readline-4.3.orig/xmalloc.h
readline-4.3/CHANGELOG-ReadLine
readline-4.3/CHANGES
readline-4.3/COPYING
readline-4.3/INSTALL
readline-4.3/MANIFEST
readline-4.3/Makefile.in
readline-4.3/README
readline-4.3/USAGE
readline-4.3/aclocal.m4
readline-4.3/ansi_stdlib.h
readline-4.3/bind.c
readline-4.3/callback.c
readline-4.3/chardefs.h
readline-4.3/compat.c
readline-4.3/complete.c
readline-4.3/config.h.in
readline-4.3/configure
readline-4.3/configure.in
readline-4.3/display.c
readline-4.3/doc/Makefile.in
readline-4.3/doc/hist.texinfo
readline-4.3/doc/history.3
readline-4.3/doc/hstech.texinfo
readline-4.3/doc/hsuser.texinfo
readline-4.3/doc/manvers.texinfo
readline-4.3/doc/readline.3
readline-4.3/doc/rlman.texinfo
readline-4.3/doc/rltech.texinfo
readline-4.3/doc/rluser.texinfo
readline-4.3/doc/rluserman.texinfo
readline-4.3/doc/texi2dvi
readline-4.3/doc/texi2html
readline-4.3/doc/texinfo.tex
readline-4.3/emacs_keymap.c
readline-4.3/examples/Inputrc
readline-4.3/examples/Makefile.in
readline-4.3/examples/excallback.c
readline-4.3/examples/fileman.c
readline-4.3/examples/histexamp.c
readline-4.3/examples/manexamp.c
readline-4.3/examples/readlinebuf.h
readline-4.3/examples/rl.c
readline-4.3/examples/rlcat.c
readline-4.3/examples/rlfe.c
readline-4.3/examples/rltest.c
readline-4.3/examples/rlversion.c
readline-4.3/funmap.c
readline-4.3/histexpand.c
readline-4.3/histfile.c
readline-4.3/histlib.h
readline-4.3/history.c
readline-4.3/history.h
readline-4.3/histsearch.c
readline-4.3/input.c
readline-4.3/isearch.c
readline-4.3/keymaps.c
readline-4.3/keymaps.h
readline-4.3/kill.c
readline-4.3/macro.c
readline-4.3/mbutil.c
readline-4.3/misc.c
readline-4.3/nls.c
readline-4.3/parens.c
readline-4.3/posixdir.h
readline-4.3/posixjmp.h
readline-4.3/posixstat.h
readline-4.3/readline.c
readline-4.3/readline.h
readline-4.3/rlconf.h
readline-4.3/rldefs.h
readline-4.3/rlmbutil.h
readline-4.3/rlprivate.h
readline-4.3/rlshell.h
readline-4.3/rlstdc.h
readline-4.3/rltty.c
readline-4.3/rltty.h
readline-4.3/rltypedefs.h
readline-4.3/rlwinsize.h
readline-4.3/savestring.c
readline-4.3/search.c
readline-4.3/shell.c
readline-4.3/shlib/Makefile.in
readline-4.3/signals.c
readline-4.3/support/config.guess
readline-4.3/support/config.sub
readline-4.3/support/install.sh
readline-4.3/support/mkdirs
readline-4.3/support/mkdist
readline-4.3/support/shlib-install
readline-4.3/support/shobj-conf
readline-4.3/support/wcwidth.c
readline-4.3/tcap.h
readline-4.3/terminal.c
readline-4.3/text.c
readline-4.3/tilde.c
readline-4.3/tilde.h
readline-4.3/undo.c
readline-4.3/util.c
readline-4.3/vi_keymap.c
readline-4.3/vi_mode.c
readline-4.3/xmalloc.c
readline-4.3/xmalloc.h
readline-doc-4.3/MANIFEST.doc
readline-doc-4.3/doc/history.0
readline-doc-4.3/doc/history.dvi
readline-doc-4.3/doc/history.html
readline-doc-4.3/doc/history.info
readline-doc-4.3/doc/history.ps
readline-doc-4.3/doc/history_3.ps
readline-doc-4.3/doc/readline.0
readline-doc-4.3/doc/readline.dvi
readline-doc-4.3/doc/readline.html
readline-doc-4.3/doc/readline.info
readline-doc-4.3/doc/readline.ps
readline-doc-4.3/doc/readline_3.ps
readline-doc-4.3/doc/rluserman.dvi
readline-doc-4.3/doc/rluserman.html
readline-doc-4.3/doc/rluserman.info
readline-doc-4.3/doc/rluserman.ps
Delete:
RTEMS_Makefiles/Makefile.readline
SendSrc.bash
readline-4.2/CHANGELOG
readline-4.2/CHANGES
readline-4.2/COPYING
readline-4.2/INSTALL
readline-4.2/MANIFEST
readline-4.2/Makefile.in
readline-4.2/README
readline-4.2/USAGE
readline-4.2/aclocal.m4
readline-4.2/ansi_stdlib.h
readline-4.2/bind.c
readline-4.2/callback.c
readline-4.2/chardefs.h
readline-4.2/compat.c
readline-4.2/complete.c
readline-4.2/config.h.in
readline-4.2/configure
readline-4.2/configure.in
readline-4.2/display.c
readline-4.2/doc/Makefile.in
readline-4.2/doc/hist.texinfo
readline-4.2/doc/history.0
readline-4.2/doc/history.3
readline-4.2/doc/history.dvi
readline-4.2/doc/history.html
readline-4.2/doc/history.info
readline-4.2/doc/history.ps
readline-4.2/doc/history_3.ps
readline-4.2/doc/hstech.texinfo
readline-4.2/doc/hsuser.texinfo
readline-4.2/doc/manvers.texinfo
readline-4.2/doc/readline.0
readline-4.2/doc/readline.3
readline-4.2/doc/readline.dvi
readline-4.2/doc/readline.html
readline-4.2/doc/readline.info
readline-4.2/doc/readline.ps
readline-4.2/doc/readline_3.ps
readline-4.2/doc/rlman.texinfo
readline-4.2/doc/rltech.texinfo
readline-4.2/doc/rluser.texinfo
readline-4.2/doc/rluserman.html
readline-4.2/doc/rluserman.info
readline-4.2/doc/rluserman.ps
readline-4.2/doc/rluserman.texinfo
readline-4.2/doc/texi2dvi
readline-4.2/doc/texi2html
readline-4.2/doc/texinfo.tex
readline-4.2/emacs_keymap.c
readline-4.2/examples/Inputrc
readline-4.2/examples/Makefile.in
readline-4.2/examples/excallback.c
readline-4.2/examples/fileman.c
readline-4.2/examples/histexamp.c
readline-4.2/examples/manexamp.c
readline-4.2/examples/rl.c
readline-4.2/examples/rlfe.c
readline-4.2/examples/rltest.c
readline-4.2/examples/rlversion.c
readline-4.2/funmap.c
readline-4.2/histexpand.c
readline-4.2/histfile.c
readline-4.2/histlib.h
readline-4.2/history.c
readline-4.2/history.h
readline-4.2/histsearch.c
readline-4.2/input.c
readline-4.2/isearch.c
readline-4.2/keymaps.c
readline-4.2/keymaps.h
readline-4.2/kill.c
readline-4.2/macro.c
readline-4.2/nls.c
readline-4.2/parens.c
readline-4.2/posixdir.h
readline-4.2/posixjmp.h
readline-4.2/posixstat.h
readline-4.2/readline.c
readline-4.2/readline.h
readline-4.2/rlconf.h
readline-4.2/rldefs.h
readline-4.2/rlprivate.h
readline-4.2/rlshell.h
readline-4.2/rlstdc.h
readline-4.2/rltty.c
readline-4.2/rltty.h
readline-4.2/rltypedefs.h
readline-4.2/rlwinsize.h
readline-4.2/savestring.c
readline-4.2/search.c
readline-4.2/shell.c
readline-4.2/shlib/Makefile.in
readline-4.2/signals.c
readline-4.2/support/config.guess
readline-4.2/support/config.sub
readline-4.2/support/install.sh
readline-4.2/support/mkdirs
readline-4.2/support/mkdist
readline-4.2/support/shlib-install
readline-4.2/support/shobj-conf
readline-4.2/tcap.h
readline-4.2/terminal.c
readline-4.2/tilde.c
readline-4.2/tilde.h
readline-4.2/undo.c
readline-4.2/util.c
readline-4.2/vi_keymap.c
readline-4.2/vi_mode.c
readline-4.2/xmalloc.c
readline-4.2/xmalloc.h
readline/CHANGES
readline/COPYING
readline/ChangeLog
readline/MANIFEST
readline/MANIFEST.doc
readline/Makefile.in
readline/Makefile.rtems
readline/README
readline/acconfig.h
readline/aclocal.m4
readline/ansi_stdlib.h
readline/bind.c
readline/callback.c
readline/chardefs.h
readline/complete.c
readline/config.guess
readline/config.h.bot
readline/config.h.in
readline/config.h.rtems
readline/config.sub
readline/configure
readline/configure.in
readline/configure_jnk
readline/configure_rtems
readline/cross-build/cygwin.cache
readline/display.c
readline/doc/ChangeLog
readline/doc/Makefile.in
readline/doc/hist.texinfo
readline/doc/hstech.texinfo
readline/doc/hsuser.texinfo
readline/doc/inc-hist.texi
readline/doc/readline.3
readline/doc/rlman.texinfo
readline/doc/rltech.texinfo
readline/doc/rluser.texinfo
readline/doc/texi2dvi
readline/doc/texi2html
readline/emacs_keymap.c
readline/examples/Inputrc
readline/examples/Makefile.in
readline/examples/fileman.c
readline/examples/histexamp.c
readline/examples/manexamp.c
readline/examples/rl.c
readline/examples/rltest.c
readline/funmap.c
readline/histexpand.c
readline/histfile.c
readline/histlib.h
readline/history.c
readline/history.h
readline/histsearch.c
readline/input.c
readline/install
readline/install-sh
readline/install.sh
readline/isearch.c
readline/keymaps.c
readline/keymaps.h
readline/kill.c
readline/macro.c
readline/mkdirs
readline/mkdist
readline/nls.c
readline/parens.c
readline/posixdir.h
readline/posixjmp.h
readline/posixstat.h
readline/readline.c
readline/readline.h
readline/rlconf.h
readline/rldefs.h
readline/rltty.c
readline/rltty.h
readline/rlwinsize.h
readline/search.c
readline/shell.c
readline/signals.c
readline/support/config.guess
readline/support/config.sub
readline/support/install.sh
readline/support/mkdirs
readline/support/mkdist
readline/tcap.h
readline/terminal.c
readline/tilde.c
readline/tilde.h
readline/undo.c
readline/util.c
readline/vi_keymap.c
readline/vi_mode.c
readline/xmalloc.c
Diffstat (limited to 'readline-4.3/history.c')
-rw-r--r-- | readline-4.3/history.c | 381 |
1 files changed, 381 insertions, 0 deletions
diff --git a/readline-4.3/history.c b/readline-4.3/history.c new file mode 100644 index 0000000..4242f33 --- /dev/null +++ b/readline-4.3/history.c @@ -0,0 +1,381 @@ +/* History.c -- standalone history library */ + +/* Copyright (C) 1989, 1992 Free Software Foundation, Inc. + + This file contains the GNU History Library (the Library), a set of + routines for managing the text of previously typed lines. + + The Library is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + The Library is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + The GNU General Public License is often shipped with GNU software, and + is generally kept in a file called COPYING or LICENSE. If you do not + have a copy of the license, write to the Free Software Foundation, + 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ + +/* The goal is to make the implementation transparent, so that you + don't have to know what data types are used, just what functions + you can call. I think I have done that. */ +#define READLINE_LIBRARY + +#if defined (HAVE_CONFIG_H) +# include <config.h> +#endif + +#include <stdio.h> + +#if defined (HAVE_STDLIB_H) +# include <stdlib.h> +#else +# include "ansi_stdlib.h" +#endif /* HAVE_STDLIB_H */ + +#if defined (HAVE_UNISTD_H) +# ifdef _MINIX +# include <sys/types.h> +# endif +# include <unistd.h> +#endif + +#include "history.h" +#include "histlib.h" + +#include "xmalloc.h" + +/* The number of slots to increase the_history by. */ +#define DEFAULT_HISTORY_GROW_SIZE 50 + +/* **************************************************************** */ +/* */ +/* History Functions */ +/* */ +/* **************************************************************** */ + +/* An array of HIST_ENTRY. This is where we store the history. */ +static HIST_ENTRY **the_history = (HIST_ENTRY **)NULL; + +/* Non-zero means that we have enforced a limit on the amount of + history that we save. */ +static int history_stifled; + +/* The current number of slots allocated to the input_history. */ +static int history_size; + +/* If HISTORY_STIFLED is non-zero, then this is the maximum number of + entries to remember. */ +int history_max_entries; +int max_input_history; /* backwards compatibility */ + +/* The current location of the interactive history pointer. Just makes + life easier for outside callers. */ +int history_offset; + +/* The number of strings currently stored in the history list. */ +int history_length; + +/* The logical `base' of the history array. It defaults to 1. */ +int history_base = 1; + +/* Return the current HISTORY_STATE of the history. */ +HISTORY_STATE * +history_get_history_state () +{ + HISTORY_STATE *state; + + state = (HISTORY_STATE *)xmalloc (sizeof (HISTORY_STATE)); + state->entries = the_history; + state->offset = history_offset; + state->length = history_length; + state->size = history_size; + state->flags = 0; + if (history_stifled) + state->flags |= HS_STIFLED; + + return (state); +} + +/* Set the state of the current history array to STATE. */ +void +history_set_history_state (state) + HISTORY_STATE *state; +{ + the_history = state->entries; + history_offset = state->offset; + history_length = state->length; + history_size = state->size; + if (state->flags & HS_STIFLED) + history_stifled = 1; +} + +/* Begin a session in which the history functions might be used. This + initializes interactive variables. */ +void +using_history () +{ + history_offset = history_length; +} + +/* Return the number of bytes that the primary history entries are using. + This just adds up the lengths of the_history->lines. */ +int +history_total_bytes () +{ + register int i, result; + + for (i = result = 0; the_history && the_history[i]; i++) + result += strlen (the_history[i]->line); + + return (result); +} + +/* Returns the magic number which says what history element we are + looking at now. In this implementation, it returns history_offset. */ +int +where_history () +{ + return (history_offset); +} + +/* Make the current history item be the one at POS, an absolute index. + Returns zero if POS is out of range, else non-zero. */ +int +history_set_pos (pos) + int pos; +{ + if (pos > history_length || pos < 0 || !the_history) + return (0); + history_offset = pos; + return (1); +} + +/* Return the current history array. The caller has to be carefull, since this + is the actual array of data, and could be bashed or made corrupt easily. + The array is terminated with a NULL pointer. */ +HIST_ENTRY ** +history_list () +{ + return (the_history); +} + +/* Return the history entry at the current position, as determined by + history_offset. If there is no entry there, return a NULL pointer. */ +HIST_ENTRY * +current_history () +{ + return ((history_offset == history_length) || the_history == 0) + ? (HIST_ENTRY *)NULL + : the_history[history_offset]; +} + +/* Back up history_offset to the previous history entry, and return + a pointer to that entry. If there is no previous entry then return + a NULL pointer. */ +HIST_ENTRY * +previous_history () +{ + return history_offset ? the_history[--history_offset] : (HIST_ENTRY *)NULL; +} + +/* Move history_offset forward to the next history entry, and return + a pointer to that entry. If there is no next entry then return a + NULL pointer. */ +HIST_ENTRY * +next_history () +{ + return (history_offset == history_length) ? (HIST_ENTRY *)NULL : the_history[++history_offset]; +} + +/* Return the history entry which is logically at OFFSET in the history array. + OFFSET is relative to history_base. */ +HIST_ENTRY * +history_get (offset) + int offset; +{ + int local_index; + + local_index = offset - history_base; + return (local_index >= history_length || local_index < 0 || !the_history) + ? (HIST_ENTRY *)NULL + : the_history[local_index]; +} + +/* Place STRING at the end of the history list. The data field + is set to NULL. */ +void +add_history (string) + const char *string; +{ + HIST_ENTRY *temp; + + if (history_stifled && (history_length == history_max_entries)) + { + register int i; + + /* If the history is stifled, and history_length is zero, + and it equals history_max_entries, we don't save items. */ + if (history_length == 0) + return; + + /* If there is something in the slot, then remove it. */ + if (the_history[0]) + { + free (the_history[0]->line); + free (the_history[0]); + } + + /* Copy the rest of the entries, moving down one slot. */ + for (i = 0; i < history_length; i++) + the_history[i] = the_history[i + 1]; + + history_base++; + } + else + { + if (history_size == 0) + { + history_size = DEFAULT_HISTORY_GROW_SIZE; + the_history = (HIST_ENTRY **)xmalloc (history_size * sizeof (HIST_ENTRY *)); + history_length = 1; + } + else + { + if (history_length == (history_size - 1)) + { + history_size += DEFAULT_HISTORY_GROW_SIZE; + the_history = (HIST_ENTRY **) + xrealloc (the_history, history_size * sizeof (HIST_ENTRY *)); + } + history_length++; + } + } + + temp = (HIST_ENTRY *)xmalloc (sizeof (HIST_ENTRY)); + temp->line = savestring (string); + temp->data = (char *)NULL; + + the_history[history_length] = (HIST_ENTRY *)NULL; + the_history[history_length - 1] = temp; +} + +/* Make the history entry at WHICH have LINE and DATA. This returns + the old entry so you can dispose of the data. In the case of an + invalid WHICH, a NULL pointer is returned. */ +HIST_ENTRY * +replace_history_entry (which, line, data) + int which; + const char *line; + histdata_t data; +{ + HIST_ENTRY *temp, *old_value; + + if (which >= history_length) + return ((HIST_ENTRY *)NULL); + + temp = (HIST_ENTRY *)xmalloc (sizeof (HIST_ENTRY)); + old_value = the_history[which]; + + temp->line = savestring (line); + temp->data = data; + the_history[which] = temp; + + return (old_value); +} + +/* Remove history element WHICH from the history. The removed + element is returned to you so you can free the line, data, + and containing structure. */ +HIST_ENTRY * +remove_history (which) + int which; +{ + HIST_ENTRY *return_value; + register int i; + + if (which >= history_length || !history_length) + return_value = (HIST_ENTRY *)NULL; + else + { + return_value = the_history[which]; + + for (i = which; i < history_length; i++) + the_history[i] = the_history[i + 1]; + + history_length--; + } + + return (return_value); +} + +/* Stifle the history list, remembering only MAX number of lines. */ +void +stifle_history (max) + int max; +{ + register int i, j; + + if (max < 0) + max = 0; + + if (history_length > max) + { + /* This loses because we cannot free the data. */ + for (i = 0, j = history_length - max; i < j; i++) + { + free (the_history[i]->line); + free (the_history[i]); + } + + history_base = i; + for (j = 0, i = history_length - max; j < max; i++, j++) + the_history[j] = the_history[i]; + the_history[j] = (HIST_ENTRY *)NULL; + history_length = j; + } + + history_stifled = 1; + max_input_history = history_max_entries = max; +} + +/* Stop stifling the history. This returns the previous maximum + number of history entries. The value is positive if the history + was stifled, negative if it wasn't. */ +int +unstifle_history () +{ + if (history_stifled) + { + history_stifled = 0; + return (history_max_entries); + } + else + return (-history_max_entries); +} + +int +history_is_stifled () +{ + return (history_stifled); +} + +void +clear_history () +{ + register int i; + + /* This loses because we cannot free the data. */ + for (i = 0; i < history_length; i++) + { + free (the_history[i]->line); + free (the_history[i]); + the_history[i] = (HIST_ENTRY *)NULL; + } + + history_offset = history_length = 0; +} |