msim/input.c

   1 /*
   2  * Copyright (c) 2012 Vojtech Horky
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /** @addtogroup msim
  30  * @{
  31  */
  32 /** @file HelenOS specific functions for MSIM simulator.
  33  */
  34
  35 /* Because of asprintf. */
  36 #define _GNU_SOURCE
  37 #include "helenos.h"
  38 #include <libclui/tinput.h>
  39 #include <errno.h>
  40 #include <stdlib.h>
  41
  42 static tinput_t *input_prompt;
  43
  44 /** Terminal and readline initialization
  45  *
  46  */
  47 void input_init(void)
  48 {
  49         input_prompt = tinput_new();
  50         if (input_prompt == NULL) {
  51                 die(1, "Failed to intialize input.");
  52         }
  53         helenos_dprinter_init();
  54 }
  55
  56 void input_inter(void)
  57 {
  58 }
  59
  60 void input_shadow( void)
  61 {
  62 }
  63
  64 void input_back( void)
  65 {
  66 }
  67
  68 char *helenos_input_get_next_command(void)
  69 {
  70         tinput_set_prompt(input_prompt, "[msim] ");
  71
  72         char *commline = NULL;
  73         int rc = tinput_read(input_prompt, &commline);
  74
  75         if (rc == ENOENT) {
  76                 rc = asprintf(&commline, "quit");
  77                 mprintf("Quit\n");
  78                 if (rc != EOK) {
  79                         exit(1);
  80                 }
  81         }
  82
  83         /* On error, it remains NULL. */
  84         return commline;
  85 }
  86
  87
  88 bool stdin_poll(char *key)
  89 {
  90         cons_event_t ev;
  91         suseconds_t timeout = 0;
  92         errno = EOK;
  93         console_flush(input_prompt->console);
  94         bool has_input = console_get_event_timeout(input_prompt->console, &ev, &timeout);
  95         if (!has_input) {
  96                 return false;
  97         }
  98
  99         if (ev.type != CEV_KEY || ev.ev.key.type != KEY_PRESS)
 100                 return false;
 101
 102         *key = ev.ev.key.c;
 103
 104         return true;
 105 }
 106