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1490 palkovsky 1
/*
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 * Copyright (C) 2006 Ondrej Palkovsky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <async.h>
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#include <ipc/fb.h>
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#include <ipc/ipc.h>
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#include <libc.h>
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#include <errno.h>
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#include <string.h>
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#include <libc.h>
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#include <stdio.h>
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#include "sysio.h"
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/* Allow only 1 connection */
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static int client_connected = 0;
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static void sysput(char c)
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{
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    __SYSCALL3(SYS_IO, 1, (sysarg_t)&c, (sysarg_t) 1);
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}
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static void sysputs(char *s)
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{
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    __SYSCALL3(SYS_IO, 1, (sysarg_t)s, strlen(s));
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}
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/** Send clearscreen sequence to console */
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static void clrscr(void)
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{
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    sysputs("\033[2J");
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}
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/** Send ansi sequence to console to change cursor position */
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static void curs_goto(unsigned int row, unsigned int col)
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{
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    char control[20];
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    if (row > 200 || col > 200)
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        return;
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    snprintf(control, 20, "\033[%d;%df",row+1, col+1);
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    sysputs(control);
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}
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static void set_style(int mode)
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{
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    char control[20];
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    snprintf(control, 20, "\033[%dm", mode);
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    sysputs(control);
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}
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/** ANSI terminal emulation main thread */
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static void sysio_client_connection(ipc_callid_t iid, ipc_call_t *icall)
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{
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    int retval;
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    ipc_callid_t callid;
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    ipc_call_t call;
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    char c;
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    int lastcol=0;
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    int lastrow=0;
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    int newcol,newrow;
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    int fgcolor,bgcolor;
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    if (client_connected) {
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        ipc_answer_fast(iid, ELIMIT, 0,0);
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        return;
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    }
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    client_connected = 1;
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    ipc_answer_fast(iid, 0, 0, 0); /* Accept connection */
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    while (1) {
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        callid = async_get_call(&call);
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        switch (IPC_GET_METHOD(call)) {
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        case IPC_M_PHONE_HUNGUP:
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            client_connected = 0;
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            ipc_answer_fast(callid,0,0,0);
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            return; /* Exit thread */
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        case FB_PUTCHAR:
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            c = IPC_GET_ARG1(call);
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            newrow = IPC_GET_ARG2(call);
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            newcol = IPC_GET_ARG3(call);
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            if (lastcol != newcol || lastrow!=newrow)
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                curs_goto(newrow, newcol);
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            lastcol = newcol + 1;
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            lastrow = newrow;
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            sysput(c);
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            retval = 0;
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            break;
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        case FB_CURSOR_GOTO:
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            newrow = IPC_GET_ARG1(call);
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            newcol = IPC_GET_ARG2(call);
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            curs_goto(newrow, newcol);
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            break;
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        case FB_GET_CSIZE:
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            ipc_answer_fast(callid, 0, 25, 80);
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            continue;
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        case FB_CLEAR:
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            clrscr();
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            retval = 0;
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            break;
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        case FB_SET_STYLE:
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            fgcolor = IPC_GET_ARG1(call);
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            bgcolor = IPC_GET_ARG2(call);
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            if (fgcolor > bgcolor)
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                set_style(0);
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            else
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                set_style(7);
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            retval = 0;
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            break;
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        default:
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            retval = ENOENT;
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        }
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        ipc_answer_fast(callid,retval,0,0);
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    }
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}
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/** ANSI terminal emulation initialization */
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void sysio_init(void)
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{
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    async_set_client_connection(sysio_client_connection);
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    clrscr();
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    curs_goto(0,0);
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}