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  1. /*
  2.  * Copyright (C) 2006 Ondrej Palkovsky
  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. #include <async.h>
  30. #include <ipc/fb.h>
  31. #include <ipc/ipc.h>
  32. #include <libc.h>
  33. #include <errno.h>
  34. #include <string.h>
  35. #include <libc.h>
  36. #include <stdio.h>
  37.  
  38. #include "sysio.h"
  39.  
  40. /* Allow only 1 connection */
  41. static int client_connected = 0;
  42.  
  43. #define CLRSCR   "\033[2J"
  44.  
  45. static void sysput(char c)
  46. {
  47.     __SYSCALL3(SYS_IO, 1, (sysarg_t)&c, (sysarg_t) 1);
  48. }
  49.  
  50. static void sysputs(char *s)
  51. {
  52.     __SYSCALL3(SYS_IO, 1, (sysarg_t)s, strlen(s));
  53. }
  54.  
  55. static void curs_goto(unsigned int row, unsigned int col)
  56. {
  57.     char control[20];
  58.  
  59.     if (row > 100 || col > 100)
  60.         return;
  61.  
  62.     snprintf(control, 20, "\033[%d;%df",row, col);
  63.     sysputs(control);
  64. }
  65.  
  66. static void sysio_client_connection(ipc_callid_t iid, ipc_call_t *icall)
  67. {
  68.     int retval;
  69.     ipc_callid_t callid;
  70.     ipc_call_t call;
  71.     char c;
  72.     int lastcol=0;
  73.     int lastrow=0;
  74.     int newcol,newrow;
  75.  
  76.     if (client_connected) {
  77.         ipc_answer_fast(iid, ELIMIT, 0,0);
  78.         return;
  79.     }
  80.     client_connected = 1;
  81.     ipc_answer_fast(iid, 0, 0, 0); /* Accept connection */
  82.     while (1) {
  83.         callid = async_get_call(&call);
  84.         switch (IPC_GET_METHOD(call)) {
  85.         case IPC_M_PHONE_HUNGUP:
  86.             client_connected = 0;
  87.             ipc_answer_fast(callid,0,0,0);
  88.             return; /* Exit thread */
  89.         case FB_PUTCHAR:
  90.             c = IPC_GET_ARG1(call);
  91.             newrow = IPC_GET_ARG2(call);
  92.             newcol = IPC_GET_ARG3(call);
  93.             if (lastcol != newcol || lastrow!=newrow)
  94.                 curs_goto(newrow, newcol);
  95.             lastcol = newcol + 1;
  96.             lastrow = newrow;
  97.             sysput(c);
  98.             retval = 0;
  99.             break;
  100.         case FB_CURSOR_GOTO:
  101.             newrow = IPC_GET_ARG1(call);
  102.             newcol = IPC_GET_ARG2(call);
  103.             curs_goto(newrow, newcol);
  104.             break;
  105.         case FB_GET_CSIZE:
  106.             ipc_answer_fast(callid, 0, 25, 80);
  107.             continue;
  108.         case FB_CLEAR:
  109.             sysputs(CLRSCR);
  110.             retval = 0;
  111.             break;
  112.         default:
  113.             retval = ENOENT;
  114.         }
  115.         ipc_answer_fast(callid,retval,0,0);
  116.     }
  117. }
  118.  
  119. void sysio_init(void)
  120. {
  121.     async_set_client_connection(sysio_client_connection);
  122.     sysputs(CLRSCR);
  123.     curs_goto(0,0);
  124. }
  125.