696 lines
16 KiB
C
696 lines
16 KiB
C
/* $NetBSD: chared.c,v 1.15 2002/03/18 16:00:50 christos Exp $ */
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Christos Zoulas of Cornell University.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "config.h"
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#if !defined(lint) && !defined(SCCSID)
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#if 0
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static char sccsid[] = "@(#)chared.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: chared.c,v 1.15 2002/03/18 16:00:50 christos Exp $");
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#endif
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#endif /* not lint && not SCCSID */
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/*
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* chared.c: Character editor utilities
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*/
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#include <stdlib.h>
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#include "el.h"
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/* value to leave unused in line buffer */
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#define EL_LEAVE 2
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/* cv_undo():
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* Handle state for the vi undo command
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*/
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protected void
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cv_undo(EditLine *el,int action, size_t size, char *ptr)
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{
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c_undo_t *vu = &el->el_chared.c_undo;
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vu->action = action;
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vu->ptr = ptr;
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vu->isize = size;
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(void) memcpy(vu->buf, vu->ptr, size);
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#ifdef DEBUG_UNDO
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(void) fprintf(el->el_errfile, "Undo buffer \"%s\" size = +%d -%d\n",
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vu->ptr, vu->isize, vu->dsize);
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#endif
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}
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/* c_insert():
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* Insert num characters
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*/
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protected void
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c_insert(EditLine *el, int num)
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{
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char *cp;
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if (el->el_line.lastchar + num >= el->el_line.limit)
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return; /* can't go past end of buffer */
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if (el->el_line.cursor < el->el_line.lastchar) {
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/* if I must move chars */
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for (cp = el->el_line.lastchar; cp >= el->el_line.cursor; cp--)
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cp[num] = *cp;
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}
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el->el_line.lastchar += num;
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}
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/* c_delafter():
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* Delete num characters after the cursor
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*/
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protected void
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c_delafter(EditLine *el, int num)
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{
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if (el->el_line.cursor + num > el->el_line.lastchar)
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num = el->el_line.lastchar - el->el_line.cursor;
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if (num > 0) {
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char *cp;
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if (el->el_map.current != el->el_map.emacs)
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cv_undo(el, INSERT, (size_t)num, el->el_line.cursor);
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for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++)
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*cp = cp[num];
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el->el_line.lastchar -= num;
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}
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}
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/* c_delbefore():
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* Delete num characters before the cursor
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*/
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protected void
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c_delbefore(EditLine *el, int num)
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{
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if (el->el_line.cursor - num < el->el_line.buffer)
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num = el->el_line.cursor - el->el_line.buffer;
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if (num > 0) {
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char *cp;
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if (el->el_map.current != el->el_map.emacs)
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cv_undo(el, INSERT, (size_t)num,
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el->el_line.cursor - num);
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for (cp = el->el_line.cursor - num;
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cp <= el->el_line.lastchar;
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cp++)
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*cp = cp[num];
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el->el_line.lastchar -= num;
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}
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}
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/* ce__isword():
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* Return if p is part of a word according to emacs
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*/
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protected int
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ce__isword(int p)
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{
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return (isalpha(p) || isdigit(p) || strchr("*?_-.[]~=", p) != NULL);
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}
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/* cv__isword():
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* Return if p is part of a word according to vi
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*/
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protected int
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cv__isword(int p)
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{
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return (!isspace(p));
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}
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/* c__prev_word():
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* Find the previous word
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*/
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protected char *
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c__prev_word(char *p, char *low, int n, int (*wtest)(int))
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{
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p--;
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while (n--) {
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while ((p >= low) && !(*wtest)((unsigned char) *p))
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p--;
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while ((p >= low) && (*wtest)((unsigned char) *p))
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p--;
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}
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/* cp now points to one character before the word */
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p++;
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if (p < low)
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p = low;
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/* cp now points where we want it */
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return (p);
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}
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/* c__next_word():
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* Find the next word
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*/
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protected char *
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c__next_word(char *p, char *high, int n, int (*wtest)(int))
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{
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while (n--) {
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while ((p < high) && !(*wtest)((unsigned char) *p))
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p++;
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while ((p < high) && (*wtest)((unsigned char) *p))
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p++;
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}
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if (p > high)
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p = high;
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/* p now points where we want it */
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return (p);
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}
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/* cv_next_word():
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* Find the next word vi style
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*/
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protected char *
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cv_next_word(EditLine *el, char *p, char *high, int n, int (*wtest)(int))
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{
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int test;
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while (n--) {
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test = (*wtest)((unsigned char) *p);
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while ((p < high) && (*wtest)((unsigned char) *p) == test)
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p++;
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/*
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* vi historically deletes with cw only the word preserving the
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* trailing whitespace! This is not what 'w' does..
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*/
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if (el->el_chared.c_vcmd.action != (DELETE|INSERT))
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while ((p < high) && isspace((unsigned char) *p))
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p++;
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}
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/* p now points where we want it */
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if (p > high)
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return (high);
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else
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return (p);
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}
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/* cv_prev_word():
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* Find the previous word vi style
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*/
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protected char *
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cv_prev_word(EditLine *el, char *p, char *low, int n, int (*wtest)(int))
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{
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int test;
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while (n--) {
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p--;
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/*
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* vi historically deletes with cb only the word preserving the
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* leading whitespace! This is not what 'b' does..
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*/
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if (el->el_chared.c_vcmd.action != (DELETE|INSERT))
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while ((p > low) && isspace((unsigned char) *p))
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p--;
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test = (*wtest)((unsigned char) *p);
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while ((p >= low) && (*wtest)((unsigned char) *p) == test)
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p--;
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p++;
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while (isspace((unsigned char) *p))
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p++;
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}
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/* p now points where we want it */
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if (p < low)
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return (low);
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else
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return (p);
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}
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#ifdef notdef
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/* c__number():
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* Ignore character p points to, return number appearing after that.
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* A '$' by itself means a big number; "$-" is for negative; '^' means 1.
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* Return p pointing to last char used.
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*/
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protected char *
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c__number(
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char *p, /* character position */
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int *num, /* Return value */
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int dval) /* dval is the number to subtract from like $-3 */
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{
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int i;
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int sign = 1;
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if (*++p == '^') {
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*num = 1;
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return (p);
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}
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if (*p == '$') {
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if (*++p != '-') {
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*num = 0x7fffffff; /* Handle $ */
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return (--p);
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}
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sign = -1; /* Handle $- */
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++p;
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}
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for (i = 0; isdigit((unsigned char) *p); i = 10 * i + *p++ - '0')
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continue;
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*num = (sign < 0 ? dval - i : i);
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return (--p);
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}
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#endif
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/* cv_delfini():
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* Finish vi delete action
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*/
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protected void
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cv_delfini(EditLine *el)
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{
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int size;
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int oaction;
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if (el->el_chared.c_vcmd.action & INSERT)
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el->el_map.current = el->el_map.key;
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oaction = el->el_chared.c_vcmd.action;
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el->el_chared.c_vcmd.action = NOP;
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if (el->el_chared.c_vcmd.pos == 0)
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return;
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if (el->el_line.cursor > el->el_chared.c_vcmd.pos) {
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size = (int) (el->el_line.cursor - el->el_chared.c_vcmd.pos);
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c_delbefore(el, size);
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el->el_line.cursor = el->el_chared.c_vcmd.pos;
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re_refresh_cursor(el);
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} else if (el->el_line.cursor < el->el_chared.c_vcmd.pos) {
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size = (int)(el->el_chared.c_vcmd.pos - el->el_line.cursor);
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c_delafter(el, size);
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} else {
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size = 1;
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c_delafter(el, size);
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}
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switch (oaction) {
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case DELETE|INSERT:
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el->el_chared.c_undo.action = DELETE|INSERT;
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break;
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case DELETE:
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el->el_chared.c_undo.action = INSERT;
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break;
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case NOP:
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case INSERT:
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default:
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EL_ABORT((el->el_errfile, "Bad oaction %d\n", oaction));
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break;
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}
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el->el_chared.c_undo.ptr = el->el_line.cursor;
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el->el_chared.c_undo.dsize = size;
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}
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#ifdef notdef
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/* ce__endword():
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* Go to the end of this word according to emacs
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*/
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protected char *
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ce__endword(char *p, char *high, int n)
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{
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p++;
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while (n--) {
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while ((p < high) && isspace((unsigned char) *p))
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p++;
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while ((p < high) && !isspace((unsigned char) *p))
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p++;
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}
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p--;
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return (p);
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}
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#endif
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/* cv__endword():
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* Go to the end of this word according to vi
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*/
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protected char *
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cv__endword(char *p, char *high, int n)
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{
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p++;
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while (n--) {
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while ((p < high) && isspace((unsigned char) *p))
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p++;
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if (isalnum((unsigned char) *p))
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while ((p < high) && isalnum((unsigned char) *p))
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p++;
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else
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while ((p < high) && !(isspace((unsigned char) *p) ||
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isalnum((unsigned char) *p)))
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p++;
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}
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p--;
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return (p);
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}
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/* ch_init():
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* Initialize the character editor
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*/
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protected int
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ch_init(EditLine *el)
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{
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el->el_line.buffer = (char *) el_malloc(EL_BUFSIZ);
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if (el->el_line.buffer == NULL)
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return (-1);
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(void) memset(el->el_line.buffer, 0, EL_BUFSIZ);
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el->el_line.cursor = el->el_line.buffer;
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el->el_line.lastchar = el->el_line.buffer;
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el->el_line.limit = &el->el_line.buffer[EL_BUFSIZ - 2];
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el->el_chared.c_undo.buf = (char *) el_malloc(EL_BUFSIZ);
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if (el->el_chared.c_undo.buf == NULL)
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return (-1);
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(void) memset(el->el_chared.c_undo.buf, 0, EL_BUFSIZ);
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el->el_chared.c_undo.action = NOP;
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el->el_chared.c_undo.isize = 0;
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el->el_chared.c_undo.dsize = 0;
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el->el_chared.c_undo.ptr = el->el_line.buffer;
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el->el_chared.c_vcmd.action = NOP;
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el->el_chared.c_vcmd.pos = el->el_line.buffer;
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el->el_chared.c_vcmd.ins = el->el_line.buffer;
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el->el_chared.c_kill.buf = (char *) el_malloc(EL_BUFSIZ);
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if (el->el_chared.c_kill.buf == NULL)
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return (-1);
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(void) memset(el->el_chared.c_kill.buf, 0, EL_BUFSIZ);
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el->el_chared.c_kill.mark = el->el_line.buffer;
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el->el_chared.c_kill.last = el->el_chared.c_kill.buf;
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el->el_map.current = el->el_map.key;
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el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */
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el->el_state.doingarg = 0;
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el->el_state.metanext = 0;
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el->el_state.argument = 1;
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el->el_state.lastcmd = ED_UNASSIGNED;
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el->el_chared.c_macro.nline = NULL;
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el->el_chared.c_macro.level = -1;
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el->el_chared.c_macro.macro = (char **) el_malloc(EL_MAXMACRO *
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sizeof(char *));
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if (el->el_chared.c_macro.macro == NULL)
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return (-1);
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return (0);
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}
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/* ch_reset():
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* Reset the character editor
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*/
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protected void
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ch_reset(EditLine *el)
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{
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el->el_line.cursor = el->el_line.buffer;
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el->el_line.lastchar = el->el_line.buffer;
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el->el_chared.c_undo.action = NOP;
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el->el_chared.c_undo.isize = 0;
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el->el_chared.c_undo.dsize = 0;
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el->el_chared.c_undo.ptr = el->el_line.buffer;
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el->el_chared.c_vcmd.action = NOP;
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el->el_chared.c_vcmd.pos = el->el_line.buffer;
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el->el_chared.c_vcmd.ins = el->el_line.buffer;
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el->el_chared.c_kill.mark = el->el_line.buffer;
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el->el_map.current = el->el_map.key;
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el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */
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el->el_state.doingarg = 0;
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el->el_state.metanext = 0;
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el->el_state.argument = 1;
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el->el_state.lastcmd = ED_UNASSIGNED;
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el->el_chared.c_macro.level = -1;
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el->el_history.eventno = 0;
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}
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/* ch_enlargebufs():
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* Enlarge line buffer to be able to hold twice as much characters.
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* Returns 1 if successful, 0 if not.
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*/
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protected int
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ch_enlargebufs(el, addlen)
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EditLine *el;
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size_t addlen;
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{
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size_t sz, newsz;
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char *newbuffer, *oldbuf, *oldkbuf;
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sz = el->el_line.limit - el->el_line.buffer + EL_LEAVE;
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newsz = sz * 2;
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/*
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* If newly required length is longer than current buffer, we need
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* to make the buffer big enough to hold both old and new stuff.
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*/
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if (addlen > sz) {
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while(newsz - sz < addlen)
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newsz *= 2;
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}
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/*
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* Reallocate line buffer.
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*/
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newbuffer = el_realloc(el->el_line.buffer, newsz);
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if (!newbuffer)
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return 0;
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/* zero the newly added memory, leave old data in */
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(void) memset(&newbuffer[sz], 0, newsz - sz);
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oldbuf = el->el_line.buffer;
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el->el_line.buffer = newbuffer;
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el->el_line.cursor = newbuffer + (el->el_line.cursor - oldbuf);
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el->el_line.lastchar = newbuffer + (el->el_line.lastchar - oldbuf);
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el->el_line.limit = &newbuffer[newsz - EL_LEAVE];
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/*
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* Reallocate kill buffer.
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*/
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newbuffer = el_realloc(el->el_chared.c_kill.buf, newsz);
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if (!newbuffer)
|
|
return 0;
|
|
|
|
/* zero the newly added memory, leave old data in */
|
|
(void) memset(&newbuffer[sz], 0, newsz - sz);
|
|
|
|
oldkbuf = el->el_chared.c_kill.buf;
|
|
|
|
el->el_chared.c_kill.buf = newbuffer;
|
|
el->el_chared.c_kill.last = newbuffer +
|
|
(el->el_chared.c_kill.last - oldkbuf);
|
|
el->el_chared.c_kill.mark = el->el_line.buffer +
|
|
(el->el_chared.c_kill.mark - oldbuf);
|
|
|
|
/*
|
|
* Reallocate undo buffer.
|
|
*/
|
|
newbuffer = el_realloc(el->el_chared.c_undo.buf, newsz);
|
|
if (!newbuffer)
|
|
return 0;
|
|
|
|
/* zero the newly added memory, leave old data in */
|
|
(void) memset(&newbuffer[sz], 0, newsz - sz);
|
|
|
|
el->el_chared.c_undo.ptr = el->el_line.buffer +
|
|
(el->el_chared.c_undo.ptr - oldbuf);
|
|
el->el_chared.c_undo.buf = newbuffer;
|
|
|
|
if (!hist_enlargebuf(el, sz, newsz))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* ch_end():
|
|
* Free the data structures used by the editor
|
|
*/
|
|
protected void
|
|
ch_end(EditLine *el)
|
|
{
|
|
el_free((ptr_t) el->el_line.buffer);
|
|
el->el_line.buffer = NULL;
|
|
el->el_line.limit = NULL;
|
|
el_free((ptr_t) el->el_chared.c_undo.buf);
|
|
el->el_chared.c_undo.buf = NULL;
|
|
el_free((ptr_t) el->el_chared.c_kill.buf);
|
|
el->el_chared.c_kill.buf = NULL;
|
|
el_free((ptr_t) el->el_chared.c_macro.macro);
|
|
el->el_chared.c_macro.macro = NULL;
|
|
ch_reset(el);
|
|
}
|
|
|
|
|
|
/* el_insertstr():
|
|
* Insert string at cursorI
|
|
*/
|
|
public int
|
|
el_insertstr(EditLine *el, const char *s)
|
|
{
|
|
size_t len;
|
|
|
|
if ((len = strlen(s)) == 0)
|
|
return (-1);
|
|
if (el->el_line.lastchar + len >= el->el_line.limit) {
|
|
if (!ch_enlargebufs(el, len))
|
|
return (-1);
|
|
}
|
|
|
|
c_insert(el, (int)len);
|
|
while (*s)
|
|
*el->el_line.cursor++ = *s++;
|
|
return (0);
|
|
}
|
|
|
|
|
|
/* el_deletestr():
|
|
* Delete num characters before the cursor
|
|
*/
|
|
public void
|
|
el_deletestr(EditLine *el, int n)
|
|
{
|
|
if (n <= 0)
|
|
return;
|
|
|
|
if (el->el_line.cursor < &el->el_line.buffer[n])
|
|
return;
|
|
|
|
c_delbefore(el, n); /* delete before dot */
|
|
el->el_line.cursor -= n;
|
|
if (el->el_line.cursor < el->el_line.buffer)
|
|
el->el_line.cursor = el->el_line.buffer;
|
|
}
|
|
|
|
/* c_gets():
|
|
* Get a string
|
|
*/
|
|
protected int
|
|
c_gets(EditLine *el, char *buf)
|
|
{
|
|
char ch;
|
|
int len = 0;
|
|
|
|
for (ch = 0; ch == 0;) {
|
|
if (el_getc(el, &ch) != 1)
|
|
return (ed_end_of_file(el, 0));
|
|
switch (ch) {
|
|
case 0010: /* Delete and backspace */
|
|
case 0177:
|
|
if (len > 1) {
|
|
*el->el_line.cursor-- = '\0';
|
|
el->el_line.lastchar = el->el_line.cursor;
|
|
buf[len--] = '\0';
|
|
} else {
|
|
el->el_line.buffer[0] = '\0';
|
|
el->el_line.lastchar = el->el_line.buffer;
|
|
el->el_line.cursor = el->el_line.buffer;
|
|
return (CC_REFRESH);
|
|
}
|
|
re_refresh(el);
|
|
ch = 0;
|
|
break;
|
|
|
|
case 0033: /* ESC */
|
|
case '\r': /* Newline */
|
|
case '\n':
|
|
break;
|
|
|
|
default:
|
|
if (len >= EL_BUFSIZ)
|
|
term_beep(el);
|
|
else {
|
|
buf[len++] = ch;
|
|
*el->el_line.cursor++ = ch;
|
|
el->el_line.lastchar = el->el_line.cursor;
|
|
}
|
|
re_refresh(el);
|
|
ch = 0;
|
|
break;
|
|
}
|
|
}
|
|
buf[len] = ch;
|
|
return (len);
|
|
}
|
|
|
|
|
|
/* c_hpos():
|
|
* Return the current horizontal position of the cursor
|
|
*/
|
|
protected int
|
|
c_hpos(EditLine *el)
|
|
{
|
|
char *ptr;
|
|
|
|
/*
|
|
* Find how many characters till the beginning of this line.
|
|
*/
|
|
if (el->el_line.cursor == el->el_line.buffer)
|
|
return (0);
|
|
else {
|
|
for (ptr = el->el_line.cursor - 1;
|
|
ptr >= el->el_line.buffer && *ptr != '\n';
|
|
ptr--)
|
|
continue;
|
|
return (el->el_line.cursor - ptr - 1);
|
|
}
|
|
}
|