From c654615466465526290ea0b0ba909b5a010b8bef Mon Sep 17 00:00:00 2001 From: Heyi Guo Date: Tue, 27 Oct 2020 08:36:40 +0800 Subject: libc/snprintf: add support to print "%" character Enable snprintf()/vsnprintf() 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 Change-Id: I9b296372a1002046eabac1df5e8eb99a27efd4a8 --- lib/libc/snprintf.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'lib') diff --git a/lib/libc/snprintf.c b/lib/libc/snprintf.c index 6e80d8c03..42faa269d 100644 --- a/lib/libc/snprintf.c +++ b/lib/libc/snprintf.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2017-2020, ARM Limited and Contributors. All rights reserved. + * Copyright (c) 2017-2021, ARM Limited and Contributors. All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ @@ -130,6 +130,13 @@ int vsnprintf(char *s, size_t n, const char *fmt, va_list args) /* Check the format specifier. */ loop: switch (*fmt) { + case '%': + if (chars_printed < n) { + *s = '%'; + s++; + } + chars_printed++; + break; case '0': case '1': case '2': -- cgit v1.2.3