1/*
2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this list of
9 *    conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
12 *    of conditions and the following disclaimer in the documentation and/or other materials
13 *    provided with the distribution.
14 *
15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
16 *    to endorse or promote products derived from this software without specific prior written
17 *    permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <stdarg.h>
33#include <stdio.h>
34#include "securec.h"
35#include "uart.h"
36#include "los_debug.h"
37#include "los_interrupt.h"
38
39static void dputs(char const *s, int (*pFputc)(int n, FILE *cookie), void *cookie)
40{
41    unsigned int intSave;
42
43    intSave = LOS_IntLock();
44    while (*s) {
45        pFputc(*s++, cookie);
46    }
47    LOS_IntRestore(intSave);
48}
49
50int printf(char const  *fmt, ...)
51{
52#define BUFSIZE  256
53    char buf[BUFSIZE] = { 0 };
54    va_list ap;
55    va_start(ap, fmt);
56    int len = vsnprintf_s(buf, sizeof(buf), BUFSIZE - 1, fmt, ap);
57    va_end(ap);
58    if (len > 0) {
59        dputs(buf, UartPutc, 0);
60    } else {
61        dputs("printf error!\n", UartPutc, 0);
62    }
63    return len;
64}
65