Mercurial > octave-nkf
view liboctave/util/oct-rl-hist.c @ 20651:e54ecb33727e
lo-array-gripes.cc: Remove FIXME's related to buffer size.
* lo-array-gripes.cc: Remove FIXME's related to buffer size. Shorten sprintf
buffers from 100 to 64 characters (still well more than 19 required).
Use 'const' decorator on constant value for clarity. Remove extra space
between variable and array bracket.
author | Rik <rik@octave.org> |
---|---|
date | Mon, 12 Oct 2015 21:13:47 -0700 |
parents | 4197fc428c7d |
children |
line wrap: on
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/* Copyright (C) 2000-2015 John W. Eaton This file is part of Octave. Octave 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 3 of the License, or (at your option) any later version. Octave 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. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #include "oct-rl-hist.h" #if defined (USE_READLINE) #include <stdio.h> #include <stdlib.h> #include <string.h> #include <readline/history.h> /* check_history_control, hc_erasedup, and the core of octave_add_history were borrowed from Bash. */ /* Check LINE against what HISTCONTROL says to do. Returns 1 if the line should be saved; 0 if it should be discarded. */ static int check_history_control (const char *line, int history_control) { HIST_ENTRY *temp; int r; if (history_control == 0) return 1; /* ignorespace or ignoreboth */ if ((history_control & HC_IGNSPACE) && *line == ' ') return 0; /* ignoredups or ignoreboth */ if (history_control & HC_IGNDUPS) { using_history (); temp = previous_history (); r = (temp == 0 || strcmp (temp->line, line)); using_history (); if (r == 0) return r; } return 1; } /* Remove all entries matching LINE from the history list. Triggered when HISTCONTROL includes `erasedups'. */ static void hc_erasedups (const char *line) { HIST_ENTRY *temp; int r; using_history (); while ((temp = previous_history ())) { if (! strcmp (temp->line, line)) { r = where_history (); remove_history (r); } } using_history (); } /* Check LINE against HISTCONTROL and add it to the history if it's OK. Returns 1 if the line was saved in the history, 0 otherwise. */ int octave_add_history (const char *line, int history_control) { if (check_history_control (line, history_control)) { /* We're committed to saving the line. If the user has requested it, remove other matching lines from the history. */ if (history_control & HC_ERASEDUPS) hc_erasedups (line); add_history (line); return 1; } return 0; } int octave_where_history (void) { return where_history (); } int octave_history_length (void) { return history_length; } int octave_max_input_history (void) { return max_input_history; } int octave_history_base (void) { return history_base; } void octave_stifle_history (int n) { stifle_history (n); } int octave_unstifle_history (void) { return unstifle_history (); } int octave_history_is_stifled (void) { return history_is_stifled (); } int octave_history_set_pos (int n) { return history_set_pos (n); } int octave_read_history (const char *f) { return read_history (f); } void octave_using_history (void) { using_history (); } int octave_read_history_range (const char *f, int b, int e) { return read_history_range (f, b, e); } int octave_write_history (const char *f) { return write_history (f); } int octave_append_history (int n, const char *f) { return append_history (n, f); } int octave_history_truncate_file (const char *f, int n) { return history_truncate_file (f, n); } void octave_remove_history (int n) { HIST_ENTRY *discard = remove_history (n); if (discard) { if (discard->line) free (discard->line); free (discard); } } void octave_clear_history (void) { clear_history (); } char * octave_history_goto_mark (int n) { HIST_ENTRY *h; char *retval = 0; if (history_set_pos (n)) { h = current_history (); if (h) retval = h->line; } return retval; } char * octave_history_get (int n) { char *retval = 0; HIST_ENTRY *h = history_get (n); if (h) retval = h->line; return retval; } char ** octave_history_list (int limit, int number_lines) { static char **retval = 0; HIST_ENTRY **hlist = 0; if (retval) { char **p = retval; while (*p) free (*p++); free (retval); retval = 0; } hlist = history_list (); if (hlist) { int i, k; int beg = 0; int end = 0; while (hlist[end]) end++; beg = (limit < 0 || end < limit) ? 0 : (end - limit); retval = malloc ((end - beg + 1) * sizeof (char **)); k = 0; for (i = beg; i < end; i++) { char *line = hlist[i]->line; int len = line ? strlen (line) : 0; char *tmp = malloc (len + 64); if (number_lines) sprintf (tmp, "%5d %s", i + history_base, line ? line : ""); else strcpy (tmp, line ? line : ""); retval[k++] = tmp; } retval[k] = 0; } return retval; } void octave_replace_history_entry (int which, const char *line) { HIST_ENTRY *discard = replace_history_entry (which, line, 0); if (discard) { if (discard->line) free (discard->line); free (discard); } } #endif