source: mainline/kernel/generic/src/printf/vprintf.c@ 32704cb

/*
 * Copyright (c) 2006 Josef Cejka
 * 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 generic
 * @{
 */
/** @file
 */

#include <print.h>
#include <printf/printf_core.h>
#include <putchar.h>
#include <synch/spinlock.h>
#include <arch/asm.h>
#include <arch/types.h>
#include <typedefs.h>
#include <string.h>

SPINLOCK_INITIALIZE(printf_lock);  /**< vprintf spinlock */

static int vprintf_write_utf8(const char *str, size_t size, void *data)
{
        index_t index = 0;
        index_t chars = 0;
        
        while (index < size) {
                putchar(utf8_decode(str, &index, size - 1));
                index++;
                chars++;
        }
        
        return chars;
}

static int vprintf_write_utf32(const wchar_t *str, size_t size, void *data)
{
        index_t index = 0;
        
        while (index < (size / sizeof(wchar_t))) {
                putchar(str[index]);
                index++;
        }
        
        return index;
}

int puts(const char *str)
{
        index_t index = 0;
        index_t chars = 0;
        wchar_t uc;
        
        while ((uc = utf8_decode(str, &index, UTF8_NO_LIMIT)) != 0) {
                putchar(uc);
                index++;
                chars++;
        }
        
        return chars;
}

int vprintf(const char *fmt, va_list ap)
{
        printf_spec_t ps = {
                vprintf_write_utf8,
                vprintf_write_utf32,
                NULL
        };
        
        ipl_t ipl = interrupts_disable();
        spinlock_lock(&printf_lock);
        
        int ret = printf_core(fmt, &ps, ap);
        
        spinlock_unlock(&printf_lock);
        interrupts_restore(ipl);
        
        return ret;
}

/** @}
 */