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-rw-r--r--lib/stdlib/printf.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/lib/stdlib/printf.c b/lib/stdlib/printf.c
new file mode 100644
index 000000000..6329157d0
--- /dev/null
+++ b/lib/stdlib/printf.c
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdarg.h>
+#include <stdio.h>
+
+/* Choose max of 512 chars for now. */
+#define PRINT_BUFFER_SIZE 512
+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;
+}