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 #define _HELENOS_SOURCE
  39 #include <libclui/tinput.h>
  40 #undef _HELENOS_SOURCE
  41 #include <errno.h>
  42 #include <stdlib.h>
  43
  44 extern void mprintf(const char *);
  45
  46 static tinput_t *input_prompt;
  47
  48 /** Terminal and readline initialization
  49  *
  50  */
  51 void input_init(void)
  52 {
  53         input_prompt = tinput_new();
  54         if (input_prompt == NULL) {
  55                 fprintf(stderr, "Failed to intialize input.");
  56                 abort();
  57         }
  58         helenos_dprinter_init();
  59 }
  60
  61 void input_inter(void)
  62 {
  63 }
  64
  65 void input_shadow( void)
  66 {
  67 }
  68
  69 void input_back( void)
  70 {
  71 }
  72
  73 char *helenos_input_get_next_command(void)
  74 {
  75         tinput_set_prompt(input_prompt, "[msim] ");
  76
  77         char *commline = NULL;
  78         int rc = tinput_read(input_prompt, &commline);
  79
  80         if (rc == ENOENT) {
  81                 rc = asprintf(&commline, "quit");
  82                 mprintf("Quit\n");
  83                 if (rc != EOK) {
  84                         exit(1);
  85                 }
  86         }
  87
  88         /* On error, it remains NULL. */
  89         return commline;
  90 }
  91
  92
  93 bool stdin_poll(char *key)
  94 {
  95         cons_event_t ev;
  96         suseconds_t timeout = 0;
  97         errno = EOK;
  98         console_flush(input_prompt->console);
  99         bool has_input = console_get_event_timeout(input_prompt->console, &ev, &timeout);
 100         if (!has_input) {
 101                 return false;
 102         }
 103
 104         if (ev.type != CEV_KEY || ev.ev.key.type != KEY_PRESS)
 105                 return false;
 106
 107         *key = ev.ev.key.c;
 108
 109         return true;
 110 }
 111