Return to wwinschar.c CVS log

Up to [CSRG BSD Unix] / 43BSDReno / usr.bin / window

Annotation of 43BSDReno/usr.bin/window/wwinschar.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * This code is derived from software contributed to Berkeley by
                      6:  * Edward Wang at The University of California, Berkeley.
                      7:  *
                      8:  * Redistribution and use in source and binary forms are permitted provided
                      9:  * that: (1) source distributions retain this entire copyright notice and
                     10:  * comment, and (2) distributions including binaries display the following
                     11:  * acknowledgement:  ``This product includes software developed by the
                     12:  * University of California, Berkeley and its contributors'' in the
                     13:  * documentation or other materials provided with the distribution and in
                     14:  * all advertising materials mentioning features or use of this software.
                     15:  * Neither the name of the University nor the names of its contributors may
                     16:  * be used to endorse or promote products derived from this software without
                     17:  * specific prior written permission.
                     18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     19:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     20:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     21:  */
                     22: 
                     23: #ifndef lint
                     24: static char sccsid[] = "@(#)wwinschar.c        3.20 (Berkeley) 6/6/90";
                     25: #endif /* not lint */
                     26: 
                     27: #include "ww.h"
                     28: #include "tt.h"
                     29: 
                     30: wwinschar(w, row, col, c, m)
                     31: register struct ww *w;
                     32: char c, m;
                     33: {
                     34:        register i;
                     35:        int nvis;
                     36:        short x = c | m << WWC_MSHIFT;
                     37: 
                     38:        /*
                     39:         * First, shift the line.
                     40:         */
                     41:        {
                     42:                register union ww_char *p, *q;
                     43: 
                     44:                p = &w->ww_buf[row][w->ww_b.r];
                     45:                q = p - 1;
                     46:                for (i = w->ww_b.r - col; --i > 0;)
                     47:                        *--p = *--q;
                     48:                q->c_w = x;
                     49:        }
                     50: 
                     51:        /*
                     52:         * If can't see it, just return.
                     53:         */
                     54:        if (row < w->ww_i.t || row >= w->ww_i.b
                     55:            || w->ww_i.r <= 0 || w->ww_i.r <= col)
                     56:                return;
                     57: 
                     58:        if (col < w->ww_i.l)
                     59:                col = w->ww_i.l;
                     60: 
                     61:        /*
                     62:         * Now find out how much is actually changed, and fix wwns.
                     63:         */
                     64:        {
                     65:                register union ww_char *buf;
                     66:                register char *win;
                     67:                register union ww_char *ns;
                     68:                register char *smap;
                     69:                char touched;
                     70: 
                     71:                nvis = 0;
                     72:                smap = &wwsmap[row][col];
                     73:                for (i = col; i < w->ww_i.r && *smap++ != w->ww_index; i++)
                     74:                        ;
                     75:                if (i >= w->ww_i.r)
                     76:                        return;
                     77:                col = i;
                     78:                buf = w->ww_buf[row];
                     79:                win = w->ww_win[row];
                     80:                ns = wwns[row];
                     81:                smap = &wwsmap[row][i];
                     82:                touched = wwtouched[row];
                     83:                for (; i < w->ww_i.r; i++) {
                     84:                        if (*smap++ != w->ww_index)
                     85:                                continue;
                     86:                        touched |= WWU_TOUCHED;
                     87:                        if (win[i])
                     88:                                ns[i].c_w =
                     89:                                        buf[i].c_w ^ win[i] << WWC_MSHIFT;
                     90:                        else {
                     91:                                nvis++;
                     92:                                ns[i] = buf[i];
                     93:                        }
                     94:                }
                     95:                wwtouched[row] = touched;
                     96:        }
                     97: 
                     98:        /*
                     99:         * Can/Should we use delete character?
                    100:         */
                    101:        if ((tt.tt_inschar || tt.tt_insspace) && nvis > (wwncol - col) / 2) {
                    102:                register union ww_char *p, *q;
                    103: 
                    104:                if (tt.tt_inschar)
                    105:                        xxinschar(row, col, c, m);
                    106:                else {
                    107:                        xxinsspace(row, col);
                    108:                        x = ' ';
                    109:                }
                    110:                p = &wwos[row][wwncol];
                    111:                q = p - 1;
                    112:                for (i = wwncol - col; --i > 0;)
                    113:                        *--p = *--q;
                    114:                q->c_w = x;
                    115:        }
                    116: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.