usr.bin/window/wwgets.c

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  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, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * @(#)wwgets.c 8.1 (Berkeley) 6/6/93
  37  * $FreeBSD: src/usr.bin/window/wwgets.c,v 1.3.14.1 2001/05/17 09:45:01 obrien Exp $
  38  * $DragonFly: src/usr.bin/window/wwgets.c,v 1.3 2005/05/07 23:20:43 corecode Exp $
  39  */
  40
  41 #include "ww.h"
  42 #include "char.h"
  43
  44 static void rub(int, struct ww *);
  45
  46 wwgets(buf, n, w)
  47 char *buf;
  48 int n;
  49 register struct ww *w;
  50 {
  51         register char *p = buf;
  52         register int c;
  53         char uc = w->ww_unctrl;
  54
  55         w->ww_unctrl = 0;
  56         for (;;) {
  57                 wwcurtowin(w);
  58                 while ((c = wwgetc()) < 0)
  59                         wwiomux();
  60 #ifdef OLD_TTY
  61                 if (c == wwoldtty.ww_sgttyb.sg_erase)
  62 #else
  63                 if (c == wwoldtty.ww_termios.c_cc[VERASE])
  64 #endif
  65                 {
  66                         if (p > buf)
  67                                 rub(*--p, w);
  68                 } else
  69 #ifdef OLD_TTY
  70                 if (c == wwoldtty.ww_sgttyb.sg_kill)
  71 #else
  72                 if (c == wwoldtty.ww_termios.c_cc[VKILL])
  73 #endif
  74                 {
  75                         while (p > buf)
  76                                 rub(*--p, w);
  77                 } else
  78 #ifdef OLD_TTY
  79                 if (c == wwoldtty.ww_ltchars.t_werasc)
  80 #else
  81                 if (c == wwoldtty.ww_termios.c_cc[VWERASE])
  82 #endif
  83                 {
  84                         while (--p >= buf && (*p == ' ' || *p == '\t'))
  85                                 rub(*p, w);
  86                         while (p >= buf && *p != ' ' && *p != '\t')
  87                                 rub(*p--, w);
  88                         p++;
  89                 } else if (c == '\r' || c == '\n') {
  90                         break;
  91                 } else {
  92                         if (p >= buf + n - 1)
  93                                 wwputc(ctrl('g'), w);
  94                         else
  95                                 if (isctrl(c))
  96                                         wwputs(unctrl(*p++ = c), w);
  97                                 else
  98                                         wwputc(*p++ = c, w);
  99                 }
 100         }
 101         *p = 0;
 102         w->ww_unctrl = uc;
 103 }
 104
 105 static void
 106 rub(c, w)
 107 struct ww *w;
 108 {
 109         register i;
 110
 111         for (i = isctrl(c) ? strlen(unctrl(c)) : 1; --i >= 0;)
 112                 (void) wwwrite(w, "\b \b", 3);
 113 }