1 files changed, 59 insertions, 0 deletions
diff --git a/libc/stdio/fwrite.c b/libc/stdio/fwrite.c
new file mode 100644
index 000000000..a5e8fd6bf
--- /dev/null
+++ b/libc/stdio/fwrite.c
@@ -0,0 +1,59 @@
+/* Copyright (C) 2004       Manuel Novoa III    <mjn3@codepoet.org>
+ *
+ * GNU Library General Public License (LGPL) version 2 or later.
+ *
+ * Dedicated to Toni.  See uClibc/DEDICATION.mjn3 for details.
+ */
+
+#include "_stdio.h"
+
+#ifdef __DO_UNLOCKED
+
+weak_alias(__fwrite_unlocked,fwrite_unlocked);
+#ifndef __UCLIBC_HAS_THREADS__
+weak_alias(__fwrite_unlocked,fwrite);
+#endif
+
+size_t __fwrite_unlocked(const void * __restrict ptr, size_t size,
+						 size_t nmemb, register FILE * __restrict stream)
+{
+	__STDIO_STREAM_VALIDATE(stream);
+
+	/* Note: If nmbem * size > SIZE_MAX then there is an application
+	 * bug since no array can be larger than SIZE_MAX in size. */
+
+	if ((__STDIO_STREAM_IS_NARROW_WRITING(stream)
+		 || !__STDIO_STREAM_TRANS_TO_WRITE(stream, __FLAG_NARROW))
+		&& size && nmemb
+		) {
+
+		if (nmemb <= (SIZE_MAX / size)) {
+			return __stdio_fwrite((const unsigned char *) ptr,
+								  size*nmemb, stream) / size;
+		}
+
+		__STDIO_STREAM_SET_ERROR(stream);
+		__set_errno(EINVAL);
+	}
+
+	return 0;
+}
+
+#elif defined __UCLIBC_HAS_THREADS__
+
+size_t fwrite(const void * __restrict ptr, size_t size,
+			  size_t nmemb, register FILE * __restrict stream)
+{
+	size_t retval;
+	__STDIO_AUTO_THREADLOCK_VAR;
+
+	__STDIO_AUTO_THREADLOCK(stream);
+
+	retval = __fwrite_unlocked(ptr, size, nmemb, stream);
+
+	__STDIO_AUTO_THREADUNLOCK(stream);
+
+	return retval;
+}
+
+#endif