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Annotation of src/usr.bin/window/wwgets.c, Revision 1.1.1.1

1.1       deraadt     1: /*     $NetBSD: wwgets.c,v 1.5 1995/09/29 00:44:10 cgd Exp $   */
                      2:
                      3: /*
                      4:  * Copyright (c) 1983, 1993
                      5:  *     The Regents of the University of California.  All rights reserved.
                      6:  *
                      7:  * This code is derived from software contributed to Berkeley by
                      8:  * Edward Wang at The University of California, Berkeley.
                      9:  *
                     10:  * Redistribution and use in source and binary forms, with or without
                     11:  * modification, are permitted provided that the following conditions
                     12:  * are met:
                     13:  * 1. Redistributions of source code must retain the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer.
                     15:  * 2. Redistributions in binary form must reproduce the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer in the
                     17:  *    documentation and/or other materials provided with the distribution.
                     18:  * 3. All advertising materials mentioning features or use of this software
                     19:  *    must display the following acknowledgement:
                     20:  *     This product includes software developed by the University of
                     21:  *     California, Berkeley and its contributors.
                     22:  * 4. Neither the name of the University nor the names of its contributors
                     23:  *    may be used to endorse or promote products derived from this software
                     24:  *    without specific prior written permission.
                     25:  *
                     26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     36:  * SUCH DAMAGE.
                     37:  */
                     38:
                     39: #ifndef lint
                     40: #if 0
                     41: static char sccsid[] = "@(#)wwgets.c   8.1 (Berkeley) 6/6/93";
                     42: #else
                     43: static char rcsid[] = "$NetBSD: wwgets.c,v 1.5 1995/09/29 00:44:10 cgd Exp $";
                     44: #endif
                     45: #endif /* not lint */
                     46:
                     47: #include "ww.h"
                     48: #include "char.h"
                     49: #include <string.h>
                     50:
                     51: wwgets(buf, n, w)
                     52: char *buf;
                     53: int n;
                     54: register struct ww *w;
                     55: {
                     56:        register char *p = buf;
                     57:        register char c;
                     58:        char uc = w->ww_unctrl;
                     59:        static void rub();
                     60:
                     61:        w->ww_unctrl = 0;
                     62:        for (;;) {
                     63:                wwcurtowin(w);
                     64:                while ((c = wwgetc()) < 0)
                     65:                        wwiomux();
                     66: #ifdef OLD_TTY
                     67:                if (c == wwoldtty.ww_sgttyb.sg_erase)
                     68: #else
                     69:                if (c == wwoldtty.ww_termios.c_cc[VERASE])
                     70: #endif
                     71:                {
                     72:                        if (p > buf)
                     73:                                rub(*--p, w);
                     74:                } else
                     75: #ifdef OLD_TTY
                     76:                if (c == wwoldtty.ww_sgttyb.sg_kill)
                     77: #else
                     78:                if (c == wwoldtty.ww_termios.c_cc[VKILL])
                     79: #endif
                     80:                {
                     81:                        while (p > buf)
                     82:                                rub(*--p, w);
                     83:                } else
                     84: #ifdef OLD_TTY
                     85:                if (c == wwoldtty.ww_ltchars.t_werasc)
                     86: #else
                     87:                if (c == wwoldtty.ww_termios.c_cc[VWERASE])
                     88: #endif
                     89:                {
                     90:                        while (--p >= buf && (*p == ' ' || *p == '\t'))
                     91:                                rub(*p, w);
                     92:                        while (p >= buf && *p != ' ' && *p != '\t')
                     93:                                rub(*p--, w);
                     94:                        p++;
                     95:                } else if (c == '\r' || c == '\n') {
                     96:                        break;
                     97:                } else {
                     98:                        if (p >= buf + n - 1)
                     99:                                wwputc(ctrl('g'), w);
                    100:                        else
                    101:                                wwputs(unctrl(*p++ = c), w);
                    102:                }
                    103:        }
                    104:        *p = 0;
                    105:        w->ww_unctrl = uc;
                    106: }
                    107:
                    108: static void
                    109: rub(c, w)
                    110: struct ww *w;
                    111: {
                    112:        register i;
                    113:
                    114:        for (i = strlen(unctrl(c)); --i >= 0;)
                    115:                (void) wwwrite(w, "\b \b", 3);
                    116: }