cc88a640ca
[patch 0/3] readline-6.2 rebase http://sourceware.org/ml/gdb-patches/2011-05/msg00003.html [patch 1/3] readline-6.2: Merge of already posted patches http://sourceware.org/ml/gdb-patches/2011-05/msg00004.html = [Bug-readline] [RFC/readline] bind.c, rl_function_dumper, Free allocated http://lists.gnu.org/archive/html/bug-readline/2011-03/msg00000.html [Bug-readline] [patch] Fix underquotation in readline/examples/rlfe/conf http://lists.gnu.org/archive/html/bug-readline/2011-04/msg00001.html [Bug-readline] [patch] Makefile.in htm<->html http://lists.gnu.org/archive/html/bug-readline/2011-04/msg00002.html Re: [Bug-readline] [patch] Makefile.in dependency: callback.o: xmalloc.h http://lists.gnu.org/archive/html/bug-readline/2011-04/msg00004.html [Bug-readline] [patch] Remove . from the VPATH directive http://lists.gnu.org/archive/html/bug-readline/2011-04/msg00005.html Eli Zaretskii's __MSDOS__ / __GO32__ / __MINGW32__ / __DJGPP__ stuff: http://sourceware.org/ml/gdb/2011-04/msg00002.html Jan Kratochvil's patch for FSF GDB tree local-specific changes: http://sourceware.org/ml/gdb/2011-04/msg00006.html Preservation of existing ChangeLog.gdb files, their updates. [patch 2/3] readline-6.2: Workaround "ask" regression http://sourceware.org/ml/gdb-patches/2011-05/msg00005.html [patch 3/3] readline-6.2: Revert 5.x compat., apply 6.x compat. http://sourceware.org/ml/gdb-patches/2011-05/msg00006.html [patch 4/3] readline-6.2: Substitute inc-hist.texinfo http://sourceware.org/ml/gdb-patches/2011-05/msg00010.html readline/ Workaround gdb.base/completion.exp regression on readline-6.2. * complete.c (get_y_or_n): Disable the return on RL_STATE_CALLBACK. Imported readline 6.2, and upstream patch 001. * configure: Regenerate. readline/doc/ * hsuser.texi (Using History Interactively): Disable !BashFeatures @defcodeindex. Make the `Programming with GNU History' reference external. * inc-hist.texinfo: Remove. Imported readline 6.2, and upstream patch 001. readline/examples/ Imported readline 6.2, and upstream patch 001. readline/examples/rlfe/ Imported readline 6.2, and upstream patch 001. gdb/ * config.in: Regenerate. * configure: Regenerate. * configure.ac <--with-system-readline> (for readline_echoing_p): Remove the test. * tui/tui-io.c (tui_old_readline_echoing_p): Rename to ... (tui_old_rl_echoing_p): ... here. (tui_setup_io): Rename extern declaration readline_echoing_p to _rl_echoing_p. Adjust assignments for the both renames. gdb/doc/ * Makefile.in (GDB_DOC_SOURCE_INCLUDES): Rename inc-hist.texinfo to hsuser.texi. * gdb.texinfo <!SYSTEM_READLINE>: Rename inc-hist.texinfo inclusion and comment to hsuser.texi. Change rluser.texi name in the comment.
519 lines
12 KiB
C
519 lines
12 KiB
C
/* history.c -- standalone history library */
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/* Copyright (C) 1989-2009 Free Software Foundation, Inc.
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This file contains the GNU History Library (History), a set of
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routines for managing the text of previously typed lines.
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History is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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History is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with History. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* The goal is to make the implementation transparent, so that you
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don't have to know what data types are used, just what functions
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you can call. I think I have done that. */
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#define READLINE_LIBRARY
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#if defined (HAVE_CONFIG_H)
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# include <config.h>
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#endif
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#include <stdio.h>
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#if defined (HAVE_STDLIB_H)
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# include <stdlib.h>
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#else
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# include "ansi_stdlib.h"
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#endif /* HAVE_STDLIB_H */
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#if defined (HAVE_UNISTD_H)
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# ifdef _MINIX
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# include <sys/types.h>
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# endif
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# include <unistd.h>
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#endif
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#include "history.h"
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#include "histlib.h"
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#include "xmalloc.h"
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/* The number of slots to increase the_history by. */
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#define DEFAULT_HISTORY_GROW_SIZE 50
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static char *hist_inittime PARAMS((void));
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/* **************************************************************** */
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/* */
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/* History Functions */
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/* */
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/* **************************************************************** */
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/* An array of HIST_ENTRY. This is where we store the history. */
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static HIST_ENTRY **the_history = (HIST_ENTRY **)NULL;
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/* Non-zero means that we have enforced a limit on the amount of
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history that we save. */
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static int history_stifled;
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/* The current number of slots allocated to the input_history. */
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static int history_size;
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/* If HISTORY_STIFLED is non-zero, then this is the maximum number of
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entries to remember. */
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int history_max_entries;
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int max_input_history; /* backwards compatibility */
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/* The current location of the interactive history pointer. Just makes
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life easier for outside callers. */
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int history_offset;
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/* The number of strings currently stored in the history list. */
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int history_length;
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/* The logical `base' of the history array. It defaults to 1. */
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int history_base = 1;
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/* Return the current HISTORY_STATE of the history. */
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HISTORY_STATE *
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history_get_history_state ()
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{
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HISTORY_STATE *state;
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state = (HISTORY_STATE *)xmalloc (sizeof (HISTORY_STATE));
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state->entries = the_history;
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state->offset = history_offset;
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state->length = history_length;
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state->size = history_size;
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state->flags = 0;
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if (history_stifled)
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state->flags |= HS_STIFLED;
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return (state);
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}
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/* Set the state of the current history array to STATE. */
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void
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history_set_history_state (state)
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HISTORY_STATE *state;
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{
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the_history = state->entries;
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history_offset = state->offset;
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history_length = state->length;
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history_size = state->size;
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if (state->flags & HS_STIFLED)
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history_stifled = 1;
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}
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/* Begin a session in which the history functions might be used. This
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initializes interactive variables. */
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void
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using_history ()
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{
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history_offset = history_length;
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}
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/* Return the number of bytes that the primary history entries are using.
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This just adds up the lengths of the_history->lines and the associated
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timestamps. */
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int
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history_total_bytes ()
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{
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register int i, result;
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for (i = result = 0; the_history && the_history[i]; i++)
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result += HISTENT_BYTES (the_history[i]);
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return (result);
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}
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/* Returns the magic number which says what history element we are
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looking at now. In this implementation, it returns history_offset. */
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int
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where_history ()
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{
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return (history_offset);
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}
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/* Make the current history item be the one at POS, an absolute index.
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Returns zero if POS is out of range, else non-zero. */
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int
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history_set_pos (pos)
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int pos;
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{
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if (pos > history_length || pos < 0 || !the_history)
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return (0);
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history_offset = pos;
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return (1);
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}
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/* Return the current history array. The caller has to be careful, since this
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is the actual array of data, and could be bashed or made corrupt easily.
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The array is terminated with a NULL pointer. */
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HIST_ENTRY **
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history_list ()
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{
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return (the_history);
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}
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/* Return the history entry at the current position, as determined by
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history_offset. If there is no entry there, return a NULL pointer. */
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HIST_ENTRY *
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current_history ()
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{
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return ((history_offset == history_length) || the_history == 0)
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? (HIST_ENTRY *)NULL
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: the_history[history_offset];
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}
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/* Back up history_offset to the previous history entry, and return
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a pointer to that entry. If there is no previous entry then return
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a NULL pointer. */
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HIST_ENTRY *
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previous_history ()
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{
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return history_offset ? the_history[--history_offset] : (HIST_ENTRY *)NULL;
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}
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/* Move history_offset forward to the next history entry, and return
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a pointer to that entry. If there is no next entry then return a
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NULL pointer. */
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HIST_ENTRY *
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next_history ()
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{
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return (history_offset == history_length) ? (HIST_ENTRY *)NULL : the_history[++history_offset];
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}
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/* Return the history entry which is logically at OFFSET in the history array.
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OFFSET is relative to history_base. */
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HIST_ENTRY *
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history_get (offset)
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int offset;
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{
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int local_index;
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local_index = offset - history_base;
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return (local_index >= history_length || local_index < 0 || the_history == 0)
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? (HIST_ENTRY *)NULL
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: the_history[local_index];
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}
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HIST_ENTRY *
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alloc_history_entry (string, ts)
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char *string;
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char *ts;
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{
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HIST_ENTRY *temp;
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temp = (HIST_ENTRY *)xmalloc (sizeof (HIST_ENTRY));
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temp->line = string ? savestring (string) : string;
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temp->data = (char *)NULL;
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temp->timestamp = ts;
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return temp;
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}
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time_t
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history_get_time (hist)
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HIST_ENTRY *hist;
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{
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char *ts;
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time_t t;
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if (hist == 0 || hist->timestamp == 0)
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return 0;
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ts = hist->timestamp;
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if (ts[0] != history_comment_char)
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return 0;
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t = (time_t) atol (ts + 1); /* XXX - should use strtol() here */
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return t;
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}
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static char *
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hist_inittime ()
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{
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time_t t;
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char ts[64], *ret;
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t = (time_t) time ((time_t *)0);
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#if defined (HAVE_VSNPRINTF) /* assume snprintf if vsnprintf exists */
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snprintf (ts, sizeof (ts) - 1, "X%lu", (unsigned long) t);
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#else
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sprintf (ts, "X%lu", (unsigned long) t);
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#endif
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ret = savestring (ts);
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ret[0] = history_comment_char;
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return ret;
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}
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/* Place STRING at the end of the history list. The data field
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is set to NULL. */
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void
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add_history (string)
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const char *string;
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{
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HIST_ENTRY *temp;
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if (history_stifled && (history_length == history_max_entries))
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{
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register int i;
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/* If the history is stifled, and history_length is zero,
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and it equals history_max_entries, we don't save items. */
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if (history_length == 0)
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return;
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/* If there is something in the slot, then remove it. */
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if (the_history[0])
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(void) free_history_entry (the_history[0]);
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/* Copy the rest of the entries, moving down one slot. */
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for (i = 0; i < history_length; i++)
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the_history[i] = the_history[i + 1];
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history_base++;
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}
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else
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{
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if (history_size == 0)
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{
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history_size = DEFAULT_HISTORY_GROW_SIZE;
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the_history = (HIST_ENTRY **)xmalloc (history_size * sizeof (HIST_ENTRY *));
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history_length = 1;
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}
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else
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{
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if (history_length == (history_size - 1))
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{
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history_size += DEFAULT_HISTORY_GROW_SIZE;
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the_history = (HIST_ENTRY **)
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xrealloc (the_history, history_size * sizeof (HIST_ENTRY *));
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}
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history_length++;
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}
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}
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temp = alloc_history_entry (string, hist_inittime ());
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the_history[history_length] = (HIST_ENTRY *)NULL;
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the_history[history_length - 1] = temp;
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}
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/* Change the time stamp of the most recent history entry to STRING. */
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void
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add_history_time (string)
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const char *string;
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{
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HIST_ENTRY *hs;
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if (string == 0)
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return;
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hs = the_history[history_length - 1];
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FREE (hs->timestamp);
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hs->timestamp = savestring (string);
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}
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/* Free HIST and return the data so the calling application can free it
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if necessary and desired. */
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histdata_t
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free_history_entry (hist)
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HIST_ENTRY *hist;
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{
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histdata_t x;
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if (hist == 0)
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return ((histdata_t) 0);
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FREE (hist->line);
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FREE (hist->timestamp);
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x = hist->data;
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xfree (hist);
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return (x);
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}
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HIST_ENTRY *
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copy_history_entry (hist)
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HIST_ENTRY *hist;
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{
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HIST_ENTRY *ret;
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char *ts;
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if (hist == 0)
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return hist;
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ret = alloc_history_entry (hist->line, (char *)NULL);
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ts = hist->timestamp ? savestring (hist->timestamp) : hist->timestamp;
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ret->timestamp = ts;
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ret->data = hist->data;
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return ret;
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}
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/* Make the history entry at WHICH have LINE and DATA. This returns
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the old entry so you can dispose of the data. In the case of an
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invalid WHICH, a NULL pointer is returned. */
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HIST_ENTRY *
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replace_history_entry (which, line, data)
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int which;
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const char *line;
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histdata_t data;
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{
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HIST_ENTRY *temp, *old_value;
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if (which < 0 || which >= history_length)
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return ((HIST_ENTRY *)NULL);
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temp = (HIST_ENTRY *)xmalloc (sizeof (HIST_ENTRY));
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old_value = the_history[which];
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temp->line = savestring (line);
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temp->data = data;
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temp->timestamp = savestring (old_value->timestamp);
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the_history[which] = temp;
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return (old_value);
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}
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/* Replace the DATA in the specified history entries, replacing OLD with
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NEW. WHICH says which one(s) to replace: WHICH == -1 means to replace
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all of the history entries where entry->data == OLD; WHICH == -2 means
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to replace the `newest' history entry where entry->data == OLD; and
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WHICH >= 0 means to replace that particular history entry's data, as
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long as it matches OLD. */
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void
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replace_history_data (which,old, new)
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int which;
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histdata_t *old, *new;
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{
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HIST_ENTRY *entry;
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register int i, last;
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if (which < -2 || which >= history_length || history_length == 0 || the_history == 0)
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return;
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if (which >= 0)
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{
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entry = the_history[which];
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if (entry && entry->data == old)
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entry->data = new;
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return;
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}
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last = -1;
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for (i = 0; i < history_length; i++)
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{
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entry = the_history[i];
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if (entry == 0)
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continue;
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if (entry->data == old)
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{
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last = i;
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if (which == -1)
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entry->data = new;
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}
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}
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if (which == -2 && last >= 0)
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{
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entry = the_history[last];
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entry->data = new; /* XXX - we don't check entry->old */
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}
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}
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/* Remove history element WHICH from the history. The removed
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element is returned to you so you can free the line, data,
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and containing structure. */
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HIST_ENTRY *
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remove_history (which)
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int which;
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{
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HIST_ENTRY *return_value;
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register int i;
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if (which < 0 || which >= history_length || history_length == 0 || the_history == 0)
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return ((HIST_ENTRY *)NULL);
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return_value = the_history[which];
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for (i = which; i < history_length; i++)
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the_history[i] = the_history[i + 1];
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history_length--;
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return (return_value);
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}
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/* Stifle the history list, remembering only MAX number of lines. */
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void
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stifle_history (max)
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int max;
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{
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register int i, j;
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if (max < 0)
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max = 0;
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if (history_length > max)
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{
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/* This loses because we cannot free the data. */
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for (i = 0, j = history_length - max; i < j; i++)
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free_history_entry (the_history[i]);
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history_base = i;
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for (j = 0, i = history_length - max; j < max; i++, j++)
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the_history[j] = the_history[i];
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the_history[j] = (HIST_ENTRY *)NULL;
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history_length = j;
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}
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history_stifled = 1;
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max_input_history = history_max_entries = max;
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}
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/* Stop stifling the history. This returns the previous maximum
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number of history entries. The value is positive if the history
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was stifled, negative if it wasn't. */
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int
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unstifle_history ()
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{
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if (history_stifled)
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{
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history_stifled = 0;
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return (history_max_entries);
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}
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else
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return (-history_max_entries);
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}
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int
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history_is_stifled ()
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{
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return (history_stifled);
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}
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void
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clear_history ()
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{
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register int i;
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/* This loses because we cannot free the data. */
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for (i = 0; i < history_length; i++)
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{
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free_history_entry (the_history[i]);
|
|
the_history[i] = (HIST_ENTRY *)NULL;
|
|
}
|
|
|
|
history_offset = history_length = 0;
|
|
}
|