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-rw-r--r--libc/stdio/fwrite.c59
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