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299 lines
7.3 KiB
C
299 lines
7.3 KiB
C
/*
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* Copyright (c) 1983, 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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* Edward Wang at The University of California, Berkeley.
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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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#ifndef lint
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static char sccsid[] = "@(#)wwwrite.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#include "ww.h"
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#include "tt.h"
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#include "char.h"
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#define UPDATE() \
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if (!w->ww_noupdate && w->ww_cur.r >= 0 && w->ww_cur.r < wwnrow && \
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wwtouched[w->ww_cur.r]) \
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wwupdate1(w->ww_cur.r, w->ww_cur.r + 1)
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/*
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* To support control character expansion, we save the old
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* p and q values in r and s, and point p at the beginning
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* of the expanded string, and q at some safe place beyond it
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* (p + 10). At strategic points in the loops, we check
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* for (r && !*p) and restore the saved values back into
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* p and q. Essentially, we implement a stack of depth 2,
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* to avoid recursion, which might be a better idea.
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*/
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wwwrite(w, p, n)
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register struct ww *w;
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register unsigned char *p;
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int n;
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{
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char hascursor;
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unsigned char *savep = p;
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unsigned char *q = p + n;
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char *r = 0;
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char *s;
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#ifdef lint
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s = 0; /* define it before possible use */
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#endif
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if (hascursor = w->ww_hascursor)
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wwcursor(w, 0);
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while (p < q && !w->ww_stopped && (!wwinterrupt() || w->ww_nointr)) {
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if (r && !*p) {
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p = r;
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q = s;
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r = 0;
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continue;
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}
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if (w->ww_wstate == 0 &&
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(isprt(*p) || w->ww_unctrl && isunctrl(*p))) {
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register i;
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register union ww_char *bp;
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int col, col1;
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if (w->ww_insert) { /* this is very slow */
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if (*p == '\t') {
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p++;
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w->ww_cur.c += 8 -
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(w->ww_cur.c - w->ww_w.l & 7);
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goto chklf;
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}
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if (!isprt(*p)) {
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r = p + 1;
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s = q;
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p = unctrl(*p);
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q = p + 10;
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}
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wwinschar(w, w->ww_cur.r, w->ww_cur.c,
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*p++, w->ww_modes);
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goto right;
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}
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bp = &w->ww_buf[w->ww_cur.r][w->ww_cur.c];
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i = w->ww_cur.c;
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while (i < w->ww_w.r && p < q)
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if (!*p && r) {
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p = r;
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q = s;
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r = 0;
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} else if (*p == '\t') {
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register tmp = 8 - (i - w->ww_w.l & 7);
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p++;
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i += tmp;
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bp += tmp;
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} else if (isprt(*p)) {
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bp++->c_w = *p++
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| w->ww_modes << WWC_MSHIFT;
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i++;
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} else if (w->ww_unctrl && isunctrl(*p)) {
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r = p + 1;
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s = q;
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p = unctrl(*p);
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q = p + 10;
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} else
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break;
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col = MAX(w->ww_cur.c, w->ww_i.l);
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col1 = MIN(i, w->ww_i.r);
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w->ww_cur.c = i;
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if (w->ww_cur.r >= w->ww_i.t
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&& w->ww_cur.r < w->ww_i.b) {
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register union ww_char *ns = wwns[w->ww_cur.r];
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register char *smap = &wwsmap[w->ww_cur.r][col];
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register char *win = w->ww_win[w->ww_cur.r];
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int nchanged = 0;
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bp = w->ww_buf[w->ww_cur.r];
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for (i = col; i < col1; i++)
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if (*smap++ == w->ww_index) {
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nchanged++;
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ns[i].c_w = bp[i].c_w
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^ win[i] << WWC_MSHIFT;
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}
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if (nchanged > 0)
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wwtouched[w->ww_cur.r] |= WWU_TOUCHED;
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}
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chklf:
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if (w->ww_cur.c >= w->ww_w.r)
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goto crlf;
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} else switch (w->ww_wstate) {
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case 0:
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switch (*p++) {
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case '\n':
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if (w->ww_mapnl)
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crlf:
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w->ww_cur.c = w->ww_w.l;
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lf:
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UPDATE();
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if (++w->ww_cur.r >= w->ww_w.b) {
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w->ww_cur.r = w->ww_w.b - 1;
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if (w->ww_w.b < w->ww_b.b) {
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(void) wwscroll1(w, w->ww_i.t,
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w->ww_i.b, 1, 0);
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w->ww_buf++;
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w->ww_b.t--;
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w->ww_b.b--;
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} else
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wwdelline(w, w->ww_b.t);
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}
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break;
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case '\b':
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if (--w->ww_cur.c < w->ww_w.l) {
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w->ww_cur.c = w->ww_w.r - 1;
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goto up;
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}
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break;
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case '\r':
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w->ww_cur.c = w->ww_w.l;
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break;
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case ctrl('g'):
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ttputc(ctrl('g'));
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break;
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case ctrl('['):
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w->ww_wstate = 1;
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break;
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}
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break;
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case 1:
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w->ww_wstate = 0;
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switch (*p++) {
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case '@':
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w->ww_insert = 1;
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break;
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case 'A':
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up:
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UPDATE();
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if (--w->ww_cur.r < w->ww_w.t) {
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w->ww_cur.r = w->ww_w.t;
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if (w->ww_w.t > w->ww_b.t) {
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(void) wwscroll1(w, w->ww_i.t,
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w->ww_i.b, -1, 0);
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w->ww_buf--;
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w->ww_b.t++;
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w->ww_b.b++;
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} else
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wwinsline(w, w->ww_b.t);
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}
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break;
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case 'B':
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goto lf;
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case 'C':
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right:
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w->ww_cur.c++;
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goto chklf;
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case 'E':
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w->ww_buf -= w->ww_w.t - w->ww_b.t;
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w->ww_b.t = w->ww_w.t;
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w->ww_b.b = w->ww_b.t + w->ww_b.nr;
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w->ww_cur.r = w->ww_w.t;
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w->ww_cur.c = w->ww_w.l;
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wwclreos(w, w->ww_w.t, w->ww_w.l);
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break;
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case 'H':
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UPDATE();
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w->ww_cur.r = w->ww_w.t;
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w->ww_cur.c = w->ww_w.l;
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break;
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case 'J':
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wwclreos(w, w->ww_cur.r, w->ww_cur.c);
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break;
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case 'K':
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wwclreol(w, w->ww_cur.r, w->ww_cur.c);
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break;
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case 'L':
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UPDATE();
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wwinsline(w, w->ww_cur.r);
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break;
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case 'M':
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wwdelline(w, w->ww_cur.r);
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break;
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case 'N':
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wwdelchar(w, w->ww_cur.r, w->ww_cur.c);
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break;
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case 'O':
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w->ww_insert = 0;
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break;
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case 'P':
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wwinschar(w, w->ww_cur.r, w->ww_cur.c, ' ', 0);
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break;
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case 'X':
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wwupdate();
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break;
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case 'Y':
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UPDATE();
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w->ww_wstate = 2;
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break;
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case 'Z':
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wwupdate();
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xxflush(0);
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break;
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case 's':
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w->ww_wstate = 4;
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break;
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case 'r':
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w->ww_wstate = 5;
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break;
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}
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break;
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case 2:
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w->ww_cur.r = w->ww_w.t +
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(unsigned)(*p++ - ' ') % w->ww_w.nr;
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w->ww_wstate = 3;
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break;
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case 3:
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w->ww_cur.c = w->ww_w.l +
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(unsigned)(*p++ - ' ') % w->ww_w.nc;
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w->ww_wstate = 0;
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break;
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case 4:
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w->ww_modes |= *p++ & wwavailmodes;
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w->ww_wstate = 0;
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break;
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case 5:
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w->ww_modes &= ~*p++;
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w->ww_wstate = 0;
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break;
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}
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}
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if (hascursor)
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wwcursor(w, 1);
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wwnwwr++;
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wwnwwra += n;
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n = p - savep;
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wwnwwrc += n;
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return n;
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}
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