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libc/printf: add support to print "%" character

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Enable printf() in TF-A to print "%" character as C standard, which
may be used in platform porting to print percentage information.

Signed-off-by: Heyi Guo <guoheyi@linux.alibaba.com>
Change-Id: I7af2f1d153548e426f423fce15dc48b0da56c622
This commit is contained in:
Heyi Guo 2020-10-27 08:36:40 +08:00
parent f03c4ea8e6
commit 128c5f0285
1 changed files with 4 additions and 1 deletions
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5
lib/libc/printf.c
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2014-2018, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2014-2021, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -108,6 +108,9 @@ int vprintf(const char *fmt, va_list args)
/* Check the format specifier */
loop:
switch (*fmt) {
case '%':
(void)putchar('%');
break;
case 'i': /* Fall through to next one */
case 'd':
num = get_num_va_args(args, l_count);