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Annotation of prex/usr/lib/libsa/_stdio.c, Revision 1.1

1.1     ! nbrk        1: /*
        !             2:  * Copyright (c) 2005-2006, Kohsuke Ohtani
        !             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:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. Neither the name of the author nor the names of any co-contributors
        !            14:  *    may be used to endorse or promote products derived from this software
        !            15:  *    without specific prior written permission.
        !            16:  *
        !            17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
        !            18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
        !            21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            27:  * SUCH DAMAGE.
        !            28:  */
        !            29:
        !            30: #include <prex/prex.h>
        !            31:
        !            32: extern void    (*__cleanup)(void);     /* in exit() */
        !            33:
        !            34: void __console_write(char *, size_t);
        !            35: char __console_read(void);
        !            36:
        !            37:
        !            38: static device_t __console_dev;
        !            39:
        !            40: static int init_done = 0;
        !            41:
        !            42: static void
        !            43: __stdio_exit(void)
        !            44: {
        !            45:
        !            46:        if (__console_dev)
        !            47:                device_close(__console_dev);
        !            48:        init_done = 0;
        !            49: }
        !            50:
        !            51: static void
        !            52: __stdio_init(void)
        !            53: {
        !            54:
        !            55:        device_open("console", 0, &__console_dev);
        !            56:        __cleanup = __stdio_exit;
        !            57:        init_done = 1;
        !            58: }
        !            59:
        !            60: void
        !            61: __console_write(char *buf, size_t len)
        !            62: {
        !            63:
        !            64:        if (init_done == 0)
        !            65:                __stdio_init();
        !            66:
        !            67:        device_write(__console_dev, buf, &len, 0);
        !            68: }
        !            69:
        !            70: char
        !            71: __console_read(void)
        !            72: {
        !            73:        char ch;
        !            74:        size_t len = 1;
        !            75:
        !            76:        if (init_done == 0)
        !            77:                __stdio_init();
        !            78:
        !            79:        device_read(__console_dev, &ch, &len, 0);
        !            80:        return (int)ch;
        !            81: }