1c6b91cb72
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@2170 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
742 lines
16 KiB
C
742 lines
16 KiB
C
/* $Id: edit.c,v 1.1 2008-03-27 00:41:33 vsc Exp $
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Part of SWI-Prolog
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Author: Jan Wielemaker
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E-mail: jan@swi.psy.uva.nl
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WWW: http://www.swi-prolog.org
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Copyright (C): 1985-2002, University of Amsterdam
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#define _MAKE_DLL 1
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#undef _export
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#include <windows.h>
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#include <tchar.h>
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#include "console.h"
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#include "console_i.h"
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#include "common.h"
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#include <memory.h>
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#include <string.h>
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#include <ctype.h>
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#ifndef EOF
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#define EOF -1
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#endif
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typedef void (*function)(Line ln, int chr); /* edit-function */
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static function dispatch_table[256]; /* general dispatch-table */
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static function dispatch_meta[256]; /* ESC-char dispatch */
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static RlcCompleteFunc _rlc_complete_function = rlc_complete_file_function;
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static void init_line_package(RlcData b);
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static void bind_actions(void);
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#ifndef min
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#define min(a, b) ((a) < (b) ? (a) : (b))
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#define max(a, b) ((a) > (b) ? (a) : (b))
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#endif
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#ifndef TRUE
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#define TRUE 1
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#define FALSE 0
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#endif
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#ifndef EOS
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#define EOS 0
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#endif
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#ifndef ESC
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#define ESC 27
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#endif
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#define COMPLETE_NEWLINE 1
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#define COMPLETE_EOF 2
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#define ctrl(c) ((c) - '@')
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#define META_OFFSET 128
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#define meta(c) ((c) + META_OFFSET)
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/*******************************
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* BUFFER *
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*******************************/
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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make_room(Line, int room)
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Make n-characters space after the point.
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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static void
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make_room(Line ln, size_t room)
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{ while ( ln->size + room + 1 > ln->allocated )
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{ if ( !ln->data )
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{ ln->data = rlc_malloc(256 * sizeof(TCHAR));
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ln->allocated = 256;
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} else
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{ ln->allocated *= 2;
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ln->data = rlc_realloc(ln->data, ln->allocated * sizeof(TCHAR));
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}
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}
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memmove(&ln->data[ln->point + room], &ln->data[ln->point],
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(ln->size - ln->point)*sizeof(TCHAR));
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ln->size += room;
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if ( room > 0 )
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ln->change_start = min(ln->change_start, ln->point);
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}
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static void
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set_line(Line ln, const TCHAR *s)
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{ size_t len = _tcslen(s);
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ln->size = ln->point = 0;
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make_room(ln, len);
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_tcsncpy(ln->data, s, len);
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}
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static void
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terminate(Line ln)
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{ if ( !ln->data )
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{ ln->data = rlc_malloc(sizeof(TCHAR));
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ln->allocated = 1;
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}
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ln->data[ln->size] = EOS;
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}
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static void
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delete(Line ln, size_t from, size_t len)
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{ if ( from < 0 || from > ln->size || len < 0 || from + len > ln->size )
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return;
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_tcsncpy(&ln->data[from], &ln->data[from+len], ln->size - (from+len));
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ln->size -= len;
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}
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/*******************************
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* POSITIONING *
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*******************************/
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static size_t
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back_word(Line ln, size_t from)
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{ from = min(from, ln->size);
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from = max(0, from);
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if ( ln->data )
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{ while(!rlc_is_word_char(ln->data[from-1]) && from > 0 )
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from--;
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while(rlc_is_word_char(ln->data[from-1]) && from > 0 )
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from--;
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}
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return from;
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}
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static size_t
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forw_word(Line ln, size_t from)
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{ from = min(from, ln->size);
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from = max(0, from);
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if ( ln->data )
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{ while(!rlc_is_word_char(ln->data[from]) && from < ln->size )
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from++;
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while(rlc_is_word_char(ln->data[from]) && from < ln->size )
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from++;
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}
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return from;
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}
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/*******************************
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* EDITING FUNCTIONS *
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*******************************/
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static __inline void
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changed(Line ln, size_t from)
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{ ln->change_start = min(ln->change_start, from);
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}
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static void
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insert_self(Line ln, int chr)
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{ make_room(ln, 1);
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ln->data[ln->point++] = chr;
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}
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static void
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backward_delete_character(Line ln, int chr)
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{ if ( ln->point > 0 )
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{ memmove(&ln->data[ln->point-1], &ln->data[ln->point],
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(ln->size - ln->point)*sizeof(TCHAR));
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ln->size--;
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ln->point--;
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}
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changed(ln, ln->point);
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}
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static void
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delete_character(Line ln, int chr)
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{ if ( ln->point < ln->size )
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{ ln->point++;
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backward_delete_character(ln, chr);
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}
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}
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static void
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backward_character(Line ln, int chr)
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{ if ( ln->point > 0 )
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ln->point--;
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}
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static void
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forward_character(Line ln, int chr)
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{ if ( ln->point < ln->size )
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ln->point++;
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}
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static void
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backward_word(Line ln, int chr)
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{ ln->point = back_word(ln, ln->point);
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}
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static void
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forward_word(Line ln, int chr)
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{ ln->point = forw_word(ln, ln->point);
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}
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static void
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backward_delete_word(Line ln, int chr)
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{ size_t from = back_word(ln, ln->point);
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memmove(&ln->data[from], &ln->data[ln->point],
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(ln->size - ln->point)*sizeof(TCHAR));
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ln->size -= ln->point - from;
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ln->point = from;
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changed(ln, from);
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}
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static void
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forward_delete_word(Line ln, int chr)
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{ size_t to = forw_word(ln, ln->point);
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memmove(&ln->data[ln->point], &ln->data[to], (ln->size - to)*sizeof(TCHAR));
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ln->size -= to - ln->point;
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changed(ln, ln->point);
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}
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static void
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transpose_chars(Line ln, int chr)
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{ if ( ln->point > 0 && ln->point < ln->size )
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{ int c0 = ln->data[ln->point-1];
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ln->data[ln->point-1] = ln->data[ln->point];
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ln->data[ln->point] = c0;
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changed(ln, ln->point-1);
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}
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}
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static void
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start_of_line(Line ln, int chr)
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{ ln->point = 0;
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}
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static void
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end_of_line(Line ln, int chr)
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{ ln->point = ln->size;
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}
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static void
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kill_line(Line ln, int chr)
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{ ln->size = ln->point;
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changed(ln, ln->size);
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}
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static void
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empty_line(Line ln, int chr)
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{ ln->size = ln->point = 0;
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changed(ln, 0);
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}
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static void
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enter(Line ln, int chr)
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{ ln->point = ln->size;
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#ifdef DOS_CRNL
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make_room(ln, 2);
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ln->data[ln->point++] = '\r';
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ln->data[ln->point++] = '\n';
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#else
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make_room(ln, 1);
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ln->data[ln->point++] = '\n';
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#endif
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terminate(ln);
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ln->complete = COMPLETE_NEWLINE;
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}
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static void
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eof(Line ln, int chr)
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{ ln->point = ln->size;
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terminate(ln);
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ln->complete = COMPLETE_EOF;
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}
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static void
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delete_character_or_eof(Line ln, int chr)
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{ if ( ln->size == 0 )
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{ ln->point = ln->size;
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terminate(ln);
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ln->complete = COMPLETE_EOF;
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} else
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delete_character(ln, chr);
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}
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static void
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undefined(Line ln, int chr)
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{
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}
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static void
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interrupt(Line ln, int chr)
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{ raise(SIGINT);
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}
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/*******************************
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* HISTORY *
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*******************************/
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static void
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add_history(rlc_console c, const TCHAR *data)
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{ const TCHAR *s = data;
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while(*s && *s <= ' ')
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s++;
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if ( *s )
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rlc_add_history(c, s);
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}
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static void
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backward_history(Line ln, int chr)
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{ const TCHAR *h;
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if ( rlc_at_head_history(ln->console) && ln->size > 0 )
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{ terminate(ln);
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add_history(ln->console, ln->data);
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}
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if ( (h = rlc_bwd_history(ln->console)) )
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{ set_line(ln, h);
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ln->point = ln->size;
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}
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}
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static void
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forward_history(Line ln, int chr)
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{ if ( !rlc_at_head_history(ln->console) )
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{ const TCHAR *h = rlc_fwd_history(ln->console);
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if ( h )
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{ set_line(ln, h);
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ln->point = ln->size;
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}
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} else
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empty_line(ln, chr);
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}
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/*******************************
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* COMPLETE *
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*******************************/
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RlcCompleteFunc
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rlc_complete_hook(RlcCompleteFunc new)
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{ RlcCompleteFunc old = _rlc_complete_function;
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_rlc_complete_function = new;
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return old;
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}
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static int
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common(const TCHAR *s1, const TCHAR *s2, int insensitive)
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{ int n = 0;
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if ( !insensitive )
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{ while(*s1 && *s1 == *s2)
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{ s1++, s2++;
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n++;
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}
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return n;
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} else
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{ while(*s1)
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{ if ( _totlower(*s1) == _totlower(*s2) )
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{ s1++, s2++;
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n++;
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} else
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break;
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}
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return n;
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}
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}
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static void
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complete(Line ln, int chr)
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{ if ( _rlc_complete_function )
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{ rlc_complete_data dbuf;
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RlcCompleteData data = &dbuf;
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memset(data, 0, sizeof(dbuf));
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data->line = ln;
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data->call_type = COMPLETE_INIT;
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if ( (*_rlc_complete_function)(data) )
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{ TCHAR match[COMPLETE_MAX_WORD_LEN];
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int nmatches = 1;
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size_t ncommon = _tcslen(data->candidate);
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size_t patlen = ln->point - data->replace_from;
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_tcscpy(match, data->candidate);
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data->call_type = COMPLETE_ENUMERATE;
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while( (*data->function)(data) )
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{ ncommon = common(match, data->candidate, data->case_insensitive);
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match[ncommon] = EOS;
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nmatches++;
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}
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data->call_type = COMPLETE_CLOSE;
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(*data->function)(data);
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delete(ln, data->replace_from, patlen);
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ln->point = data->replace_from;
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make_room(ln, ncommon);
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_tcsncpy(&ln->data[data->replace_from], match, ncommon);
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ln->point += ncommon;
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if ( nmatches == 1 && data->quote )
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insert_self(ln, data->quote);
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}
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}
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}
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#define MAX_LIST_COMPLETIONS 256
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static void
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list_completions(Line ln, int chr)
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{ if ( _rlc_complete_function )
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{ rlc_complete_data dbuf;
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RlcCompleteData data = &dbuf;
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memset(data, 0, sizeof(dbuf));
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data->line = ln;
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data->call_type = COMPLETE_INIT;
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if ( (*_rlc_complete_function)(data) )
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{ TCHAR *buf[COMPLETE_MAX_MATCHES];
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int n, nmatches = 0;
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size_t len = _tcslen(data->candidate) + 1;
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size_t longest = len;
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size_t cols;
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buf[nmatches] = rlc_malloc(len*sizeof(TCHAR));
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_tcsncpy(buf[nmatches], data->candidate, len);
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nmatches++;
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data->call_type = COMPLETE_ENUMERATE;
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while( (*data->function)(data) )
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{ len = _tcslen(data->candidate) + 1;
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buf[nmatches] = rlc_malloc(len*sizeof(TCHAR));
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_tcsncpy(buf[nmatches], data->candidate, len);
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nmatches++;
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longest = max(longest, len);
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if ( nmatches > COMPLETE_MAX_MATCHES )
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{ TCHAR *msg = _T("\r\n! Too many matches\r\n");
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while(*msg)
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rlc_putchar(ln->console, *msg++);
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ln->reprompt = TRUE;
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data->call_type = COMPLETE_CLOSE;
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(*data->function)(data);
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return;
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}
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}
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data->call_type = COMPLETE_CLOSE;
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(*data->function)(data);
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cols = ScreenCols(ln->console) / longest;
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rlc_putchar(ln->console, '\r');
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rlc_putchar(ln->console, '\n');
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for(n=0; n<nmatches; )
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{ TCHAR *s = buf[n];
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len = 0;
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while(*s)
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{ len++;
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rlc_putchar(ln->console, *s++);
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}
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rlc_free(buf[n++]);
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if ( n % cols == 0 )
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{ rlc_putchar(ln->console, '\r');
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rlc_putchar(ln->console, '\n');
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} else
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{ while( len++ < longest )
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rlc_putchar(ln->console, ' ');
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}
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}
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if ( nmatches % cols != 0 )
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{ rlc_putchar(ln->console, '\r');
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rlc_putchar(ln->console, '\n');
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}
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ln->reprompt = TRUE;
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}
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}
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}
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/*******************************
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* REPAINT *
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*******************************/
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static void
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output(rlc_console b, TCHAR *s, size_t len)
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{ while(len-- > 0)
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{ if ( *s == '\n' )
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rlc_putchar(b, '\r');
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rlc_putchar(b, *s++);
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}
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}
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static void
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update_display(Line ln)
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{ if ( ln->reprompt )
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{ const TCHAR *prompt = rlc_prompt(ln->console, NULL);
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const TCHAR *s = prompt;
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rlc_putchar(ln->console, '\r');
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while(*s)
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rlc_putchar(ln->console, *s++);
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rlc_get_mark(ln->console, &ln->origin);
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ln->change_start = 0;
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ln->reprompt = FALSE;
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}
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rlc_goto_mark(ln->console, &ln->origin, ln->data, ln->change_start);
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output(ln->console,
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&ln->data[ln->change_start], ln->size - ln->change_start);
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rlc_erase_from_caret(ln->console);
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rlc_goto_mark(ln->console, &ln->origin, ln->data, ln->point);
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rlc_update(ln->console);
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ln->change_start = ln->size;
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}
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/*******************************
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* TOPLEVEL *
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*******************************/
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|
|
TCHAR *
|
|
read_line(rlc_console b)
|
|
{ line ln;
|
|
|
|
init_line_package(b);
|
|
|
|
memset(&ln, 0, sizeof(line));
|
|
ln.console = b;
|
|
rlc_get_mark(b, &ln.origin);
|
|
|
|
while(!ln.complete)
|
|
{ int c;
|
|
rlc_mark m0, m1;
|
|
function func;
|
|
|
|
rlc_get_mark(b, &m0);
|
|
if ( (c = getch(b)) == IMODE_SWITCH_CHAR )
|
|
return RL_CANCELED_CHARP;
|
|
|
|
if ( c == EOF )
|
|
{ eof(&ln, c);
|
|
update_display(&ln);
|
|
break;
|
|
} else if ( c == ESC )
|
|
{ if ( (c = getch(b)) == IMODE_SWITCH_CHAR )
|
|
return RL_CANCELED_CHARP;
|
|
if ( c > 256 )
|
|
func = undefined;
|
|
else
|
|
func = dispatch_meta[c&0xff];
|
|
} else
|
|
{ if ( c >= 256 )
|
|
func = insert_self;
|
|
else
|
|
func = dispatch_table[c&0xff];
|
|
}
|
|
|
|
rlc_get_mark(b, &m1);
|
|
|
|
(*func)(&ln, c);
|
|
if ( m0.mark_x != m1.mark_x || m0.mark_y != m1.mark_y )
|
|
ln.reprompt = TRUE;
|
|
update_display(&ln);
|
|
}
|
|
rlc_clearprompt(b);
|
|
|
|
add_history(b, ln.data);
|
|
|
|
return ln.data;
|
|
}
|
|
|
|
|
|
/*******************************
|
|
* DISPATCH *
|
|
*******************************/
|
|
|
|
static void
|
|
init_dispatch_table()
|
|
{ static int done;
|
|
|
|
if ( !done )
|
|
{ int n;
|
|
|
|
for(n=0; n<32; n++)
|
|
dispatch_table[n] = undefined;
|
|
for(n=32; n<256; n++)
|
|
dispatch_table[n] = insert_self;
|
|
for(n=0; n<256; n++)
|
|
dispatch_meta[n] = undefined;
|
|
|
|
bind_actions();
|
|
|
|
done = TRUE;
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
init_line_package(RlcData b)
|
|
{ init_dispatch_table();
|
|
rlc_init_history(b, 50);
|
|
}
|
|
|
|
/*******************************
|
|
* BIND *
|
|
*******************************/
|
|
|
|
typedef struct _action
|
|
{ char *name;
|
|
function function;
|
|
unsigned char keys[4];
|
|
} action, *Action;
|
|
|
|
#define ACTION(n, f, k) { n, f, k }
|
|
|
|
static action actions[] = {
|
|
ACTION("insert_self", insert_self, ""),
|
|
ACTION("backward_delete_character", backward_delete_character, "\b"),
|
|
ACTION("complete", complete, "\t"),
|
|
ACTION("enter", enter, "\r\n"),
|
|
ACTION("start_of_line", start_of_line, {ctrl('A')}),
|
|
ACTION("backward_character", backward_character, {ctrl('B')}),
|
|
ACTION("interrupt", interrupt, {ctrl('C')}),
|
|
ACTION("end_of_line", end_of_line, {ctrl('E')}),
|
|
ACTION("forward_character", forward_character, {ctrl('F')}),
|
|
ACTION("transpose_chars", transpose_chars, {ctrl('T')}),
|
|
ACTION("kill_line", kill_line, {ctrl('K')}),
|
|
ACTION("backward_history", backward_history, {ctrl('P')}),
|
|
ACTION("forward_history", forward_history, {ctrl('N')}),
|
|
ACTION("empty_line", empty_line, {ctrl('U')}),
|
|
ACTION("eof", eof, {ctrl('Z')}),
|
|
|
|
ACTION("delete_character_or_eof", delete_character_or_eof, {ctrl('D')}),
|
|
ACTION("delete_character", delete_character, {127}),
|
|
{ "forward_word", forward_word, {meta(ctrl('F')), meta('f')}},
|
|
{ "backward_word", backward_word, {meta(ctrl('B')), meta('b')}},
|
|
{ "forward_delete_word", forward_delete_word, {meta(127), meta('d')}},
|
|
ACTION("list_completions", list_completions, {meta('?')}),
|
|
ACTION("backward_delete_word", backward_delete_word, {meta('\b')}),
|
|
|
|
ACTION(NULL, NULL, "")
|
|
};
|
|
|
|
int
|
|
rlc_bind(int chr, const char *fname)
|
|
{ if ( chr >= 0 && chr <= 256 )
|
|
{ Action a = actions;
|
|
|
|
for( ; a->name; a++ )
|
|
{ if ( strcmp(a->name, fname) == 0 )
|
|
{ if ( chr > META_OFFSET )
|
|
dispatch_meta[chr-META_OFFSET] = a->function;
|
|
else
|
|
dispatch_table[chr] = a->function;
|
|
|
|
return TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
bind_actions()
|
|
{ Action a = actions;
|
|
|
|
for( ; a->name; a++ )
|
|
{ unsigned char *k = a->keys;
|
|
|
|
for( ; *k; k++ )
|
|
{ int chr = *k & 0xff;
|
|
|
|
if ( chr > META_OFFSET )
|
|
dispatch_meta[chr-META_OFFSET] = a->function;
|
|
else
|
|
dispatch_table[chr] = a->function;
|
|
}
|
|
}
|
|
}
|
|
|
|
|