1 /*
2 * Copyright (c) 2022-2022 Huawei Device Co., Ltd. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without modification,
5 * are permitted provided that the following conditions are met:
6 *
7 * 1. Redistributions of source code must retain the above copyright notice, this list of
8 * conditions and the following disclaimer.
9 *
10 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
11 * of conditions and the following disclaimer in the documentation and/or other materials
12 * provided with the distribution.
13 *
14 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
15 * to endorse or promote products derived from this software without specific prior written
16 * permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
22 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
25 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
27 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
28 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include <stdarg.h>
32 #include <stdio.h>
33 #include "securec.h"
34 #include "uart.h"
35 #include "los_debug.h"
36 #include "los_interrupt.h"
37
dputs(char const * s,int (* pFputc)(int n,FILE * cookie),void * cookie)38 static void dputs(char const *s, int (*pFputc)(int n, FILE *cookie), void *cookie)
39 {
40 unsigned int intSave;
41
42 intSave = LOS_IntLock();
43 while (*s) {
44 pFputc(*s++, cookie);
45 }
46 LOS_IntRestore(intSave);
47 }
48
printf(const char * __restrict __format,...)49 int printf(const char *__restrict __format, ...)
50 {
51 #define BUFSIZE 256
52 char buf[BUFSIZE] = { 0 };
53 va_list ap;
54 va_start(ap, __format);
55 int len = vsnprintf_s(buf, sizeof(buf), BUFSIZE - 1, __format, ap);
56 va_end(ap);
57 if (len > 0) {
58 dputs(buf, UartPutc, 0);
59 } else {
60 dputs("printf error!\n", UartPutc, 0);
61 }
62 return len;
63 }
64