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Annotation of prex-old/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: static device_t __console_dev;
        !            35:
        !            36: static int init_done = 0;
        !            37:
        !            38: void
        !            39: __stdio_exit(void)
        !            40: {
        !            41:
        !            42:        if (__console_dev)
        !            43:                device_close(__console_dev);
        !            44:        init_done = 0;
        !            45: }
        !            46:
        !            47: static void
        !            48: __stdio_init(void)
        !            49: {
        !            50:
        !            51:        device_open("console", 0, &__console_dev);
        !            52:        __cleanup = __stdio_exit;
        !            53:        init_done = 1;
        !            54: }
        !            55:
        !            56: void
        !            57: __console_write(char *buf, size_t len)
        !            58: {
        !            59:
        !            60:        if (init_done == 0)
        !            61:                __stdio_init();
        !            62:
        !            63:        device_write(__console_dev, buf, &len, 0);
        !            64: }
        !            65:
        !            66: char
        !            67: __console_read(void)
        !            68: {
        !            69:        char ch;
        !            70:        size_t len = 1;
        !            71:
        !            72:        if (init_done == 0)
        !            73:                __stdio_init();
        !            74:
        !            75:        device_read(__console_dev, &ch, &len, 0);
        !            76:        return (int)ch;
        !            77: }