876 lines
15 KiB
C
876 lines
15 KiB
C
/*-
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* This code is derived from software copyrighted by the Free Software
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* Foundation.
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*
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* Modified 1991 by Donn Seeley at UUNET Technologies, Inc.
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* Modified 1990 by Van Jacobson at Lawrence Berkeley Laboratory.
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*
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* @(#)vi_mode.c 6.4 (Berkeley) 5/8/91
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*/
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/* vi_mode.c -- A vi emulation mode for Bash.
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Mostly written by Jeff Sparkes (jeff1@????).
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*/
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/* **************************************************************** */
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/* */
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/* VI Emulation Mode */
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/* */
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/* **************************************************************** */
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/* Last string searched for from `/' or `?'. */
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static char *vi_last_search = (char *)NULL;
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static int vi_histpos;
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/* *** UNCLEAN *** */
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/* Command keys which do movement for xxx_to commands. */
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static char *vi_motion = " hl^$0ftFt;,%wbeWBE|";
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/* Keymap used for vi replace characters. Created dynamically since
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rarely used. */
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static Keymap vi_replace_map = (Keymap)NULL;
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/* The number of characters inserted in the last replace operation. */
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static vi_replace_count = 0;
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/* Yank the nth arg from the previous line into this line at point. */
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rl_vi_yank_arg (count)
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int count;
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{
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rl_yank_nth_arg (count);
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}
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/* Search again for the last thing searched for. */
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rl_vi_search_again (ignore, key)
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int ignore, key;
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{
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switch (key)
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{
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case 'n':
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rl_vi_dosearch (vi_last_search, -1);
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break;
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case 'N':
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rl_vi_dosearch (vi_last_search, 1);
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break;
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}
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}
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/* Do a vi style search. */
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rl_vi_search (count, key)
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int count, key;
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{
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int dir, c;
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char *p;
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switch (key)
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{
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case '?':
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dir = 1;
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break;
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case '/':
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dir = -1;
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break;
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default:
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ding ();
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return;
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}
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vi_histpos = where_history ();
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maybe_save_line ();
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/* Reuse the line input buffer to read the search string. */
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the_line[0] = 0;
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rl_end = rl_point = 0;
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p = (char *)alloca (2 + (rl_prompt ? strlen (rl_prompt) : 0));
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sprintf (p, "%s%c", rl_prompt ? rl_prompt : "", key);
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rl_message (p);
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while (c = rl_read_key (in_stream))
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{
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switch (c)
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{
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case CTRL('W'):
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case CTRL('U'):
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case CTRL('H'):
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case RUBOUT:
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rl_dispatch (c, keymap);
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break;
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case ESC:
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case RETURN:
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case NEWLINE:
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goto dosearch;
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break;
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case CTRL('C'):
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maybe_unsave_line ();
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rl_clear_message ();
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rl_point = 0;
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ding ();
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return;
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default:
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rl_insert (1, c);
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break;
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}
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rl_redisplay ();
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}
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dosearch:
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if (vi_last_search)
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free (vi_last_search);
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vi_last_search = savestring (the_line);
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rl_vi_dosearch (the_line, dir);
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}
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rl_vi_dosearch (string, dir)
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char *string;
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int dir;
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{
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int old, save = vi_histpos;
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HIST_ENTRY *h;
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if (string == 0 || *string == 0 || vi_histpos < 0)
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{
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ding ();
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return;
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}
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if ((save = history_search_pos (string, dir, vi_histpos + dir)) == -1)
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{
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maybe_unsave_line ();
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rl_clear_message ();
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rl_point = 0;
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ding ();
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return;
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}
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vi_histpos = save;
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old = where_history ();
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history_set_pos (vi_histpos);
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h = current_history ();
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history_set_pos (old);
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strcpy (the_line, h->line);
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rl_undo_list = (UNDO_LIST *)h->data;
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rl_end = strlen (the_line);
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rl_point = 0;
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rl_clear_message ();
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}
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/* Completion, from vi's point of view. */
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rl_vi_complete (ignore, key)
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int ignore, key;
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{
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if (!whitespace (the_line[rl_point]))
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{
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rl_vi_end_word (1, 'E');
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rl_point++;
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}
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rl_complete_internal ('*');
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rl_vi_insertion_mode ();
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}
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/* Previous word in vi mode. */
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rl_vi_prev_word (count, key)
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int count, key;
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{
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if (count < 0)
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{
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rl_vi_next_word (-count, key);
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return;
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}
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if (uppercase_p (key))
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rl_vi_bWord (count);
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else
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rl_vi_bword (count);
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}
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/* Next word in vi mode. */
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rl_vi_next_word (count, key)
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int count;
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{
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if (count < 0)
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{
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rl_vi_prev_word (-count, key);
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return;
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}
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if (uppercase_p (key))
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rl_vi_fWord (count);
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else
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rl_vi_fword (count);
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}
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/* Move to the end of the ?next? word. */
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rl_vi_end_word (count, key)
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int count, key;
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{
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if (count < 0)
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{
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ding ();
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return;
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}
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if (uppercase_p (key))
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rl_vi_eWord (count);
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else
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rl_vi_eword (count);
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}
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/* Move forward a word the way that 'W' does. */
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rl_vi_fWord (count)
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int count;
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{
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while (count-- && rl_point < (rl_end - 1))
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{
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/* Skip until whitespace. */
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while (!whitespace (the_line[rl_point]) && rl_point < rl_end)
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rl_point++;
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/* Now skip whitespace. */
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while (whitespace (the_line[rl_point]) && rl_point < rl_end)
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rl_point++;
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}
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}
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rl_vi_bWord (count)
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int count;
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{
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while (count-- && rl_point > 0)
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{
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while (rl_point-- >= 0 && whitespace (the_line[rl_point]));
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while (rl_point >= 0 && !whitespace (the_line[rl_point]))
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rl_point--;
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rl_point++;
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}
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}
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rl_vi_eWord (count)
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int count;
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{
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while (count -- && rl_point < (rl_end - 1))
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{
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while (rl_point++ < rl_end && whitespace (the_line[rl_point]));
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while (rl_point++ < rl_end && !whitespace (the_line[rl_point]));
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rl_point--;
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}
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}
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rl_vi_fword (count)
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int count;
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{
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while (count -- && rl_point < (rl_end - 1))
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{
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if (isident (the_line[rl_point]))
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{
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while (isident (the_line[rl_point]) && rl_point < rl_end)
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rl_point += 1;
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}
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else if (!whitespace (the_line[rl_point]))
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{
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while (!isident (the_line[rl_point]) &&
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!whitespace (the_line[rl_point]) && rl_point < rl_end)
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rl_point += 1;
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}
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while (whitespace (the_line[rl_point]) && rl_point < rl_end)
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rl_point++;
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}
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}
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rl_vi_bword (count)
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int count;
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{
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while (count -- && rl_point > 0)
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{
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while (--rl_point > 0 && whitespace (the_line[rl_point]));
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if (rl_point > 0)
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{
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if (isident (the_line[rl_point]))
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while (--rl_point >= 0 && isident (the_line[rl_point]));
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else
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while (--rl_point >= 0 && !isident (the_line[rl_point]) &&
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!whitespace (the_line[rl_point]));
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rl_point++;
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}
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}
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}
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rl_vi_eword (count)
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int count;
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{
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while (count -- && rl_point < rl_end - 1)
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{
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while (++rl_point < rl_end && whitespace (the_line[rl_point]));
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if (rl_point < rl_end)
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{
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if (isident (the_line[rl_point]))
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while (++rl_point < rl_end && isident (the_line[rl_point]));
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else
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while (++rl_point < rl_end && !isident (the_line[rl_point])
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&& !whitespace (the_line[rl_point]));
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rl_point--;
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}
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}
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}
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rl_vi_insert_beg ()
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{
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rl_beg_of_line ();
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rl_vi_insertion_mode ();
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return 0;
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}
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rl_vi_append_mode ()
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{
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if (rl_point < rl_end)
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rl_point += 1;
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rl_vi_insertion_mode ();
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return 0;
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}
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rl_vi_append_eol ()
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{
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rl_end_of_line ();
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rl_vi_append_mode ();
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return 0;
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}
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/* What to do in the case of C-d. */
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rl_vi_eof_maybe (count, c)
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int count, c;
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{
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rl_newline (1, '\n');
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}
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/* Insertion mode stuff. */
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/* Switching from one mode to the other really just involves
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switching keymaps. */
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rl_vi_insertion_mode ()
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{
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keymap = vi_insertion_keymap;
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}
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rl_vi_movement_mode ()
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{
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if (rl_point > 0)
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rl_backward (1);
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keymap = vi_movement_keymap;
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if (vi_doing_insert)
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{
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rl_end_undo_group ();
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vi_doing_insert = 0;
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}
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}
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rl_vi_arg_digit (count, c)
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int count, c;
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{
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if (c == '0' && rl_numeric_arg == 1 && !rl_explicit_arg)
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rl_beg_of_line ();
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else
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rl_digit_argument (count, c);
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}
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/* Doesn't take an arg count in vi */
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rl_vi_change_case (ignore1, ignore2)
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int ignore1, ignore2;
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{
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char c = 0;
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if (uppercase_p (the_line[rl_point]))
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c = to_lower (the_line[rl_point]);
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else if (lowercase_p (the_line[rl_point]))
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c = to_upper (the_line[rl_point]);
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/* Vi is kind of strange here. */
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if (c)
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{
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rl_begin_undo_group ();
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rl_delete (1);
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rl_insert (1, c);
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rl_end_undo_group ();
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rl_vi_check ();
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}
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else
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rl_forward (1);
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}
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rl_vi_put (count, key)
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int count, key;
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{
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if (!uppercase_p (key))
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{
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if(rl_point != rl_end)
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rl_point++;
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}
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rl_yank ();
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rl_backward (1);
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}
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rl_vi_check ()
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{
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if (rl_point && rl_point == rl_end)
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rl_point--;
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}
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rl_vi_column (count)
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{
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if (count > rl_end)
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rl_end_of_line ();
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else
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rl_point = count - 1;
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}
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int
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rl_vi_domove ()
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{
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int c, save;
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rl_mark = rl_point;
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c = rl_read_key (in_stream);
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if (!member (c, vi_motion))
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{
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if (digit (c))
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{
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save = rl_numeric_arg;
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rl_digit_loop1 ();
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rl_numeric_arg *= save;
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}
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else
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return (-1);
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}
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rl_dispatch (c, keymap);
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/* No change in position means the command failed. */
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if (rl_mark == rl_point)
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return (-1);
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if ((c == 'w' || c == 'W') && rl_point < rl_end)
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{
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rl_point--;
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while((rl_point > 0) && whitespace (the_line[rl_point]))
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rl_point--;
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rl_point++;
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}
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if (rl_mark < rl_point)
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exchange (rl_point, rl_mark);
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return (0);
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}
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/* A simplified loop for vi. Don't dispatch key at end.
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Don't recognize minus sign? */
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rl_digit_loop1 ()
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{
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int key, c;
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while (1)
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{
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rl_message ("(arg: %d) ", arg_sign * rl_numeric_arg);
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key = c = rl_read_key ();
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if (keymap[c].type == ISFUNC &&
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keymap[c].function == rl_universal_argument)
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{
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rl_numeric_arg *= 4;
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continue;
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}
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c = UNMETA (c);
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if (numeric (c))
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{
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if (rl_explicit_arg)
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rl_numeric_arg = (rl_numeric_arg * 10) + (c - '0');
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else
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rl_numeric_arg = (c - '0');
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rl_explicit_arg = 1;
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}
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else
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{
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rl_clear_message ();
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rl_stuff_char (key);
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}
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}
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}
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rl_vi_delete_to (count, key)
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int count, key;
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{
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if (uppercase_p (key))
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rl_stuff_char ('$');
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if (rl_vi_domove ())
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{
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ding ();
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return;
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}
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rl_kill_text (rl_point, rl_mark);
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}
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rl_vi_change_to (count, key)
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int count, key;
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{
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if (uppercase_p (key))
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rl_stuff_char ('$');
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if (rl_vi_domove ())
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{
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ding ();
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return;
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}
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rl_begin_undo_group ();
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vi_doing_insert = 1;
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rl_kill_text (rl_point, rl_mark);
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rl_vi_insertion_mode ();
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}
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rl_vi_yank_to (count, key)
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int count, key;
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{
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int save = rl_point;
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if (uppercase_p (key))
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rl_stuff_char ('$');
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if (rl_vi_domove ())
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{
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ding ();
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return;
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}
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rl_begin_undo_group ();
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rl_kill_text (rl_point, rl_mark);
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rl_end_undo_group ();
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rl_do_undo ();
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rl_point = save;
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}
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rl_vi_delete (count)
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{
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if (rl_point >= rl_end - 1)
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{
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rl_delete (count);
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if (rl_point > 0)
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rl_backward (1);
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}
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else
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rl_delete (count);
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}
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/* Turn the current line into a comment in shell history. A ksh function */
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rl_vi_comment ()
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{
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rl_beg_of_line ();
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rl_insert_text (": "); /* # doesn't work in interactive mode */
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rl_redisplay ();
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rl_newline (1, '\010');
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}
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rl_vi_first_print ()
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{
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rl_back_to_indent ();
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}
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rl_back_to_indent (ignore1, ignore2)
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int ignore1, ignore2;
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{
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rl_beg_of_line ();
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while (rl_point < rl_end && whitespace (the_line[rl_point]))
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rl_point++;
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}
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/* NOTE: it is necessary that opposite directions are inverses */
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#define FTO 1 /* forward to */
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#define BTO -1 /* backward to */
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#define FFIND 2 /* forward find */
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#define BFIND -2 /* backward find */
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rl_vi_char_search (count, key)
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int count, key;
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{
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static char target;
|
||
static int orig_dir, dir;
|
||
int pos;
|
||
|
||
if (key == ';' || key == ',')
|
||
dir = (key == ';' ? orig_dir : -orig_dir);
|
||
else
|
||
{
|
||
target = rl_read_key();
|
||
|
||
switch (key)
|
||
{
|
||
case 't':
|
||
orig_dir = dir = FTO;
|
||
break;
|
||
|
||
case 'T':
|
||
orig_dir = dir = BTO;
|
||
break;
|
||
|
||
case 'f':
|
||
orig_dir = dir = FFIND;
|
||
break;
|
||
|
||
case 'F':
|
||
orig_dir = dir = BFIND;
|
||
break;
|
||
}
|
||
}
|
||
|
||
pos = rl_point;
|
||
|
||
if (dir < 0)
|
||
{
|
||
pos--;
|
||
do
|
||
{
|
||
if (the_line[pos] == target)
|
||
{
|
||
if (dir == BTO)
|
||
rl_point = pos + 1;
|
||
else
|
||
rl_point = pos;
|
||
return;
|
||
}
|
||
}
|
||
while (pos--);
|
||
|
||
if (pos < 0)
|
||
{
|
||
ding ();
|
||
return;
|
||
}
|
||
}
|
||
else
|
||
{ /* dir > 0 */
|
||
pos++;
|
||
do
|
||
{
|
||
if (the_line[pos] == target)
|
||
{
|
||
if (dir == FTO)
|
||
rl_point = pos - 1;
|
||
else
|
||
rl_point = pos;
|
||
return;
|
||
}
|
||
}
|
||
while (++pos < rl_end);
|
||
|
||
if (pos >= (rl_end - 1))
|
||
ding ();
|
||
}
|
||
}
|
||
|
||
/* Match brackets */
|
||
rl_vi_match ()
|
||
{
|
||
int count = 1, brack, pos;
|
||
|
||
pos = rl_point;
|
||
if ((brack = rl_vi_bracktype (the_line[rl_point])) == 0)
|
||
{
|
||
while ((brack = rl_vi_bracktype (the_line[rl_point])) == 0 &&
|
||
rl_point < rl_end - 1)
|
||
rl_forward (1);
|
||
|
||
if (brack <= 0)
|
||
{
|
||
rl_point = pos;
|
||
ding ();
|
||
return;
|
||
}
|
||
}
|
||
|
||
pos = rl_point;
|
||
|
||
if (brack < 0)
|
||
{
|
||
while (count)
|
||
{
|
||
if (--pos >= 0)
|
||
{
|
||
int b = rl_vi_bracktype (the_line[pos]);
|
||
if (b == -brack)
|
||
count--;
|
||
else if (b == brack)
|
||
count++;
|
||
}
|
||
else
|
||
{
|
||
ding ();
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{ /* brack > 0 */
|
||
while (count)
|
||
{
|
||
if (++pos < rl_end)
|
||
{
|
||
int b = rl_vi_bracktype (the_line[pos]);
|
||
if (b == -brack)
|
||
count--;
|
||
else if (b == brack)
|
||
count++;
|
||
}
|
||
else
|
||
{
|
||
ding ();
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
rl_point = pos;
|
||
}
|
||
|
||
int
|
||
rl_vi_bracktype (c)
|
||
int c;
|
||
{
|
||
switch (c)
|
||
{
|
||
case '(': return 1;
|
||
case ')': return -1;
|
||
case '[': return 2;
|
||
case ']': return -2;
|
||
case '{': return 3;
|
||
case '}': return -3;
|
||
default: return 0;
|
||
}
|
||
}
|
||
|
||
rl_vi_change_char ()
|
||
{
|
||
int c;
|
||
|
||
c = rl_read_key();
|
||
|
||
switch (c)
|
||
{
|
||
case '\033':
|
||
case CTRL('C'):
|
||
return;
|
||
|
||
default:
|
||
rl_begin_undo_group ();
|
||
rl_delete (1);
|
||
rl_insert (1, c);
|
||
rl_end_undo_group ();
|
||
break;
|
||
}
|
||
}
|
||
|
||
rl_vi_subst (count, key)
|
||
int count, key;
|
||
{
|
||
rl_begin_undo_group ();
|
||
vi_doing_insert = 1;
|
||
|
||
if (uppercase_p (key))
|
||
{
|
||
rl_beg_of_line ();
|
||
rl_kill_line (1);
|
||
}
|
||
else
|
||
rl_delete (1);
|
||
|
||
rl_vi_insertion_mode ();
|
||
}
|
||
|
||
rl_vi_overstrike (count, key)
|
||
int count, key;
|
||
{
|
||
int i;
|
||
|
||
if (vi_doing_insert == 0)
|
||
{
|
||
vi_doing_insert = 1;
|
||
rl_begin_undo_group ();
|
||
}
|
||
|
||
for (i = 0; i < count; i++)
|
||
{
|
||
vi_replace_count++;
|
||
rl_begin_undo_group ();
|
||
|
||
if (rl_point < rl_end)
|
||
{
|
||
rl_delete (1);
|
||
rl_insert (1, key);
|
||
}
|
||
else
|
||
rl_insert (1, key);
|
||
|
||
rl_end_undo_group ();
|
||
}
|
||
}
|
||
|
||
rl_vi_overstrike_delete (count)
|
||
int count;
|
||
{
|
||
int i, s;
|
||
|
||
for (i = 0; i < count; i++)
|
||
{
|
||
if (vi_replace_count == 0)
|
||
{
|
||
ding ();
|
||
break;
|
||
}
|
||
s = rl_point;
|
||
|
||
if (rl_do_undo ())
|
||
vi_replace_count--;
|
||
|
||
if (rl_point == s)
|
||
rl_backward (1);
|
||
}
|
||
|
||
if (vi_replace_count == 0 && vi_doing_insert)
|
||
{
|
||
rl_end_undo_group ();
|
||
rl_do_undo ();
|
||
vi_doing_insert = 0;
|
||
}
|
||
}
|
||
|
||
rl_vi_replace ()
|
||
{
|
||
int i;
|
||
|
||
vi_replace_count = 0;
|
||
|
||
vi_replace_map = rl_make_bare_keymap ();
|
||
|
||
for (i = ' '; i < 127; i++)
|
||
vi_replace_map[i].function = rl_vi_overstrike;
|
||
|
||
vi_replace_map[RUBOUT].function = rl_vi_overstrike_delete;
|
||
vi_replace_map[CTRL('H')].function = rl_vi_overstrike_delete;
|
||
vi_replace_map[ESC].function = rl_vi_movement_mode;
|
||
vi_replace_map[RETURN].function = rl_newline;
|
||
vi_replace_map[NEWLINE].function = rl_newline;
|
||
keymap = vi_replace_map;
|
||
}
|