usr.bin/window/wwgets.c

   1 /*      $NetBSD: wwgets.c,v 1.9 2003/08/07 11:17:40 agc 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. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)wwgets.c    8.1 (Berkeley) 6/6/93";
  39 #else
  40 __RCSID("$NetBSD: wwgets.c,v 1.9 2003/08/07 11:17:40 agc Exp $");
  41 #endif
  42 #endif /* not lint */
  43
  44 #include <string.h>
  45 #include "ww.h"
  46 #include "char.h"
  47
  48 static void rub(int, struct ww *);
  49
  50 void
  51 wwgets(char *buf, int n, struct ww *w)
  52 {
  53         char *p = buf;
  54         int c;
  55         int uc = ISSET(w->ww_wflags, WWW_UNCTRL);
  56
  57         CLR(w->ww_wflags, WWW_UNCTRL);
  58         for (;;) {
  59                 wwcurtowin(w);
  60                 while ((c = wwgetc()) < 0)
  61                         wwiomux();
  62 #ifdef OLD_TTY
  63                 if (c == wwoldtty.ww_sgttyb.sg_erase)
  64 #else
  65                 if (c == wwoldtty.ww_termios.c_cc[VERASE])
  66 #endif
  67                 {
  68                         if (p > buf)
  69                                 rub(*--p, w);
  70                 } else
  71 #ifdef OLD_TTY
  72                 if (c == wwoldtty.ww_sgttyb.sg_kill)
  73 #else
  74                 if (c == wwoldtty.ww_termios.c_cc[VKILL])
  75 #endif
  76                 {
  77                         while (p > buf)
  78                                 rub(*--p, w);
  79                 } else
  80 #ifdef OLD_TTY
  81                 if (c == wwoldtty.ww_ltchars.t_werasc)
  82 #else
  83                 if (c == wwoldtty.ww_termios.c_cc[VWERASE])
  84 #endif
  85                 {
  86                         while (--p >= buf && (*p == ' ' || *p == '\t'))
  87                                 rub(*p, w);
  88                         while (p >= buf && *p != ' ' && *p != '\t')
  89                                 rub(*p--, w);
  90                         p++;
  91                 } else if (c == '\r' || c == '\n') {
  92                         break;
  93                 } else {
  94                         if (p >= buf + n - 1)
  95                                 wwputc(ctrl('g'), w);
  96                         else
  97                                 wwputs(unctrl(*p++ = c), w);
  98                 }
  99         }
 100         *p = 0;
 101         SET(w->ww_wflags, uc);
 102 }
 103
 104 static void
 105 rub(int c, struct ww *w)
 106 {
 107         int i;
 108
 109         for (i = strlen(unctrl(c)); --i >= 0;)
 110                 (void) wwwrite(w, "\b \b", 3);
 111 }