usr.bin/window/wwgets.c

   1 /*      @(#)wwgets.c    8.1 (Berkeley) 6/6/93   */
   2 /*      $NetBSD: wwgets.c,v 1.9 2003/08/07 11:17:40 agc Exp $   */
   3
   4 /*
   5  * Copyright (c) 1983, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Edward Wang at The University of California, Berkeley.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <string.h>
  37 #include "ww.h"
  38 #include "char.h"
  39
  40 static void rub(int, struct ww *);
  41
  42 void
  43 wwgets(char *buf, int n, struct ww *w)
  44 {
  45         char *p = buf;
  46         int c;
  47         int uc = ISSET(w->ww_wflags, WWW_UNCTRL);
  48
  49         CLR(w->ww_wflags, WWW_UNCTRL);
  50         for (;;) {
  51                 wwcurtowin(w);
  52                 while ((c = wwgetc()) < 0)
  53                         wwiomux();
  54 #ifdef OLD_TTY
  55                 if (c == wwoldtty.ww_sgttyb.sg_erase)
  56 #else
  57                 if (c == wwoldtty.ww_termios.c_cc[VERASE])
  58 #endif
  59                 {
  60                         if (p > buf)
  61                                 rub(*--p, w);
  62                 } else
  63 #ifdef OLD_TTY
  64                 if (c == wwoldtty.ww_sgttyb.sg_kill)
  65 #else
  66                 if (c == wwoldtty.ww_termios.c_cc[VKILL])
  67 #endif
  68                 {
  69                         while (p > buf)
  70                                 rub(*--p, w);
  71                 } else
  72 #ifdef OLD_TTY
  73                 if (c == wwoldtty.ww_ltchars.t_werasc)
  74 #else
  75                 if (c == wwoldtty.ww_termios.c_cc[VWERASE])
  76 #endif
  77                 {
  78                         while (--p >= buf && (*p == ' ' || *p == '\t'))
  79                                 rub(*p, w);
  80                         while (p >= buf && *p != ' ' && *p != '\t')
  81                                 rub(*p--, w);
  82                         p++;
  83                 } else if (c == '\r' || c == '\n') {
  84                         break;
  85                 } else {
  86                         if (p >= buf + n - 1)
  87                                 wwputc(ctrl('g'), w);
  88                         else
  89                                 wwputs(unctrl(*p++ = c), w);
  90                 }
  91         }
  92         *p = 0;
  93         SET(w->ww_wflags, uc);
  94 }
  95
  96 static void
  97 rub(int c, struct ww *w)
  98 {
  99         int i;
 100
 101         for (i = strlen(unctrl(c)); --i >= 0;)
 102                 (void) wwwrite(w, "\b \b", 3);
 103 }