window/wwgets.c

   1 /*      $NetBSD: wwgets.c,v 1.7 1997/11/21 08:37:24 lukem 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 #include <sys/cdefs.h>
  40 #ifndef lint
  41 #if 0
  42 static char sccsid[] = "@(#)wwgets.c    8.1 (Berkeley) 6/6/93";
  43 #else
  44 __RCSID("$NetBSD: wwgets.c,v 1.7 1997/11/21 08:37:24 lukem Exp $");
  45 #endif
  46 #endif /* not lint */
  47
  48 #include <string.h>
  49 #include "ww.h"
  50 #include "char.h"
  51
  52 static void rub __P((int, struct ww *));
  53
  54 void
  55 wwgets(buf, n, w)
  56         char *buf;
  57         int n;
  58         struct ww *w;
  59 {
  60         char *p = buf;
  61         int c;
  62         int uc = ISSET(w->ww_wflags, WWW_UNCTRL);
  63
  64         CLR(w->ww_wflags, WWW_UNCTRL);
  65         for (;;) {
  66                 wwcurtowin(w);
  67                 while ((c = wwgetc()) < 0)
  68                         wwiomux();
  69 #ifdef OLD_TTY
  70                 if (c == wwoldtty.ww_sgttyb.sg_erase)
  71 #else
  72                 if (c == wwoldtty.ww_termios.c_cc[VERASE])
  73 #endif
  74                 {
  75                         if (p > buf)
  76                                 rub(*--p, w);
  77                 } else
  78 #ifdef OLD_TTY
  79                 if (c == wwoldtty.ww_sgttyb.sg_kill)
  80 #else
  81                 if (c == wwoldtty.ww_termios.c_cc[VKILL])
  82 #endif
  83                 {
  84                         while (p > buf)
  85                                 rub(*--p, w);
  86                 } else
  87 #ifdef OLD_TTY
  88                 if (c == wwoldtty.ww_ltchars.t_werasc)
  89 #else
  90                 if (c == wwoldtty.ww_termios.c_cc[VWERASE])
  91 #endif
  92                 {
  93                         while (--p >= buf && (*p == ' ' || *p == '\t'))
  94                                 rub(*p, w);
  95                         while (p >= buf && *p != ' ' && *p != '\t')
  96                                 rub(*p--, w);
  97                         p++;
  98                 } else if (c == '\r' || c == '\n') {
  99                         break;
 100                 } else {
 101                         if (p >= buf + n - 1)
 102                                 wwputc(ctrl('g'), w);
 103                         else
 104                                 wwputs(unctrl(*p++ = c), w);
 105                 }
 106         }
 107         *p = 0;
 108         SET(w->ww_wflags, uc);
 109 }
 110
 111 static void
 112 rub(c, w)
 113         int c;
 114         struct ww *w;
 115 {
 116         int i;
 117
 118         for (i = strlen(unctrl(c)); --i >= 0;)
 119                 (void) wwwrite(w, "\b \b", 3);
 120 }