source: mainline/uspace/lib/c/generic/io/console.c@ f9b2cb4c

/*
 * Copyright (c) 2006 Josef Cejka
 * Copyright (c) 2006 Jakub Vana
 * Copyright (c) 2008 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup libc
 * @{
 */
/** @file
 */

#include <libc.h>
#include <async.h>
#include <errno.h>
#include <malloc.h>
#include <vfs/vfs_sess.h>
#include <io/console.h>
#include <ipc/console.h>

console_ctrl_t *console_init(FILE *ifile, FILE *ofile)
{
        console_ctrl_t *ctrl = malloc(sizeof(console_ctrl_t));
        if (!ctrl)
                return NULL;
        
        ctrl->input_sess = fsession(ifile, INTERFACE_CONSOLE);
        if (!ctrl->input_sess) {
                free(ctrl);
                return NULL;
        }
        
        ctrl->output_sess = fsession(ofile, INTERFACE_CONSOLE);
        if (!ctrl->output_sess) {
                free(ctrl);
                return NULL;
        }
        
        ctrl->input = ifile;
        ctrl->output = ofile;
        ctrl->input_aid = 0;
        
        return ctrl;
}

void console_done(console_ctrl_t *ctrl)
{
        free(ctrl);
}

bool console_kcon(void)
{
        return __SYSCALL0(SYS_DEBUG_CONSOLE);
}

void console_flush(console_ctrl_t *ctrl)
{
        fflush(ctrl->output);
}

void console_clear(console_ctrl_t *ctrl)
{
        async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
        async_req_0_0(exch, CONSOLE_CLEAR);
        async_exchange_end(exch);
}

int console_get_size(console_ctrl_t *ctrl, sysarg_t *cols, sysarg_t *rows)
{
        async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
        int rc = async_req_0_2(exch, CONSOLE_GET_SIZE, cols, rows);
        async_exchange_end(exch);
        
        return rc;
}

void console_set_style(console_ctrl_t *ctrl, uint8_t style)
{
        async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
        async_req_1_0(exch, CONSOLE_SET_STYLE, style);
        async_exchange_end(exch);
}

void console_set_color(console_ctrl_t *ctrl, uint8_t bgcolor, uint8_t fgcolor,
    uint8_t flags)
{
        async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
        async_req_3_0(exch, CONSOLE_SET_COLOR, bgcolor, fgcolor, flags);
        async_exchange_end(exch);
}

void console_set_rgb_color(console_ctrl_t *ctrl, uint32_t bgcolor,
    uint32_t fgcolor)
{
        async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
        async_req_2_0(exch, CONSOLE_SET_RGB_COLOR, bgcolor, fgcolor);
        async_exchange_end(exch);
}

void console_cursor_visibility(console_ctrl_t *ctrl, bool show)
{
        async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
        async_req_1_0(exch, CONSOLE_SET_CURSOR_VISIBILITY, (show != false));
        async_exchange_end(exch);
}

int console_get_color_cap(console_ctrl_t *ctrl, sysarg_t *ccap)
{
        async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
        int rc = async_req_0_1(exch, CONSOLE_GET_COLOR_CAP, ccap);
        async_exchange_end(exch);
        
        return rc;
}

int console_get_pos(console_ctrl_t *ctrl, sysarg_t *col, sysarg_t *row)
{
        async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
        int rc = async_req_0_2(exch, CONSOLE_GET_POS, col, row);
        async_exchange_end(exch);
        
        return rc;
}

void console_set_pos(console_ctrl_t *ctrl, sysarg_t col, sysarg_t row)
{
        async_exch_t *exch = async_exchange_begin(ctrl->output_sess);
        async_req_2_0(exch, CONSOLE_SET_POS, col, row);
        async_exchange_end(exch);
}

static int console_ev_decode(ipc_call_t *call, cons_event_t *event)
{
        event->type = IPC_GET_ARG1(*call);

        switch (event->type) {
        case CEV_KEY:
                event->ev.key.type = IPC_GET_ARG2(*call);
                event->ev.key.key = IPC_GET_ARG3(*call);
                event->ev.key.mods = IPC_GET_ARG4(*call);
                event->ev.key.c = IPC_GET_ARG5(*call);
                break;
        case CEV_POS:
                event->ev.pos.pos_id = IPC_GET_ARG2(*call) >> 16;
                event->ev.pos.type = IPC_GET_ARG2(*call) & 0xffff;
                event->ev.pos.btn_num = IPC_GET_ARG3(*call);
                event->ev.pos.hpos = IPC_GET_ARG4(*call);
                event->ev.pos.vpos = IPC_GET_ARG5(*call);
                break;
        default:
                return EIO;
        }

        return EOK;
}

bool console_get_event(console_ctrl_t *ctrl, cons_event_t *event)
{
        if (ctrl->input_aid == 0) {
                ipc_call_t result;
                
                async_exch_t *exch = async_exchange_begin(ctrl->input_sess);
                aid_t aid = async_send_0(exch, CONSOLE_GET_EVENT, &result);
                async_exchange_end(exch);
                
                sysarg_t rc;
                async_wait_for(aid, &rc);
                
                if (rc != EOK) {
                        errno = rc;
                        return false;
                }
                
                rc = console_ev_decode(&result, event);
                if (rc != EOK) {
                        errno = rc;
                        return false;
                }
        } else {
                sysarg_t retval;
                async_wait_for(ctrl->input_aid, &retval);
                
                ctrl->input_aid = 0;
                
                if (retval != EOK) {
                        errno = (int) retval;
                        return false;
                }
                
                int rc = console_ev_decode(&ctrl->input_call, event);
                if (rc != EOK) {
                        errno = rc;
                        return false;
                }
        }
        
        return true;
}

bool console_get_event_timeout(console_ctrl_t *ctrl, cons_event_t *event,
    suseconds_t *timeout)
{
        struct timeval t0;
        gettimeofday(&t0, NULL);
        
        if (ctrl->input_aid == 0) {
                async_exch_t *exch = async_exchange_begin(ctrl->input_sess);
                ctrl->input_aid = async_send_0(exch, CONSOLE_GET_EVENT,
                    &ctrl->input_call);
                async_exchange_end(exch);
        }
        
        sysarg_t retval;
        int rc = async_wait_timeout(ctrl->input_aid, &retval, *timeout);
        if (rc != EOK) {
                *timeout = 0;
                errno = rc;
                return false;
        }
        
        ctrl->input_aid = 0;
        
        if (retval != EOK) {
                errno = (int) retval;
                return false;
        }
        
        rc = console_ev_decode(&ctrl->input_call, event);
        if (rc != EOK) {
                errno = rc;
                return false;
        }
        
        /* Update timeout */
        struct timeval t1;
        gettimeofday(&t1, NULL);
        *timeout -= tv_sub_diff(&t1, &t0);
        
        return true;
}

/** @}
 */