xref: /device/qemu/arm_mps3_an547/liteos_m/board/libc/dprintf.c

/*
 * Copyright (c) 2022-2022 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "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 COPYRIGHT HOLDER OR
 * CONTRIBUTORS 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.
 */

#include <stdarg.h>
#include <stdio.h>
#include "securec.h"
#include "uart.h"
#include "los_debug.h"
#include "los_interrupt.h"

static void dputs(char const *s, int (*pFputc)(int n, FILE *cookie), void *cookie)
{
    unsigned int intSave;

    intSave = LOS_IntLock();
    while (*s) {
        pFputc(*s++, cookie);
    }
    LOS_IntRestore(intSave);
}

int printf(const char *__restrict __format, ...)
{
#define BUFSIZE  256
    char buf[BUFSIZE] = { 0 };
    va_list ap;
    va_start(ap, __format);
    int len = vsnprintf_s(buf, sizeof(buf), BUFSIZE - 1, __format, ap);
    va_end(ap);
    if (len > 0) {
        dputs(buf, UartPutc, 0);
    } else {
        dputs("printf error!\n", UartPutc, 0);
    }
    return len;
}