From 61f72a34250d063da67f4fc2b0eb8c3fda3376be Mon Sep 17 00:00:00 2001 From: Roberto Vargas Date: Tue, 8 May 2018 10:27:10 +0100 Subject: Create a library file for libc TF Makefile was linking all the objects files generated for the c library instead of creating a static library that could be used in the linking stage. Change-Id: I721daea097e9b13cbb42c9f8eaa2af8fea0799cf Signed-off-by: Roberto Vargas --- lib/libc/printf.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 lib/libc/printf.c (limited to 'lib/libc/printf.c') diff --git a/lib/libc/printf.c b/lib/libc/printf.c new file mode 100644 index 00000000..f6156414 --- /dev/null +++ b/lib/libc/printf.c @@ -0,0 +1,36 @@ +/* + * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include +#include + +/* Choose max of 128 chars for now. */ +#define PRINT_BUFFER_SIZE 128 +int printf(const char *fmt, ...) +{ + va_list args; + char buf[PRINT_BUFFER_SIZE]; + int count; + + va_start(args, fmt); + vsnprintf(buf, sizeof(buf) - 1, fmt, args); + va_end(args); + + /* Use putchar directly as 'puts()' adds a newline. */ + buf[PRINT_BUFFER_SIZE - 1] = '\0'; + count = 0; + while (buf[count]) + { + if (putchar(buf[count]) != EOF) { + count++; + } else { + count = EOF; + break; + } + } + + return count; +} -- cgit v1.2.3