1 files changed, 78 insertions, 0 deletions
diff --git a/libc/stdio/_fwrite.c b/libc/stdio/_fwrite.c
new file mode 100644
index 000000000..a706ba7e6
--- /dev/null
+++ b/libc/stdio/_fwrite.c
@@ -0,0 +1,78 @@
+/* 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 __STDIO_BUFFERS
+
+/* Either buffer data or (commit buffer if necessary and) write. */
+
+size_t __stdio_fwrite(const unsigned char * __restrict buffer,
+					  size_t bytes,
+					  register FILE * __restrict stream)
+{
+	size_t pending;
+	const unsigned char *p;
+
+	__STDIO_STREAM_VALIDATE(stream);
+	assert(__STDIO_STREAM_IS_WRITING(stream));
+	assert(buffer);
+	assert(bytes);
+
+	if (!__STDIO_STREAM_IS_NBF(stream)) { /* FBF or LBF. */
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning CONSIDER: Try to consolidate some of the code?
+#endif
+		if (__STDIO_STREAM_IS_FAKE_VSNPRINTF(stream)) {
+			pending = __STDIO_STREAM_BUFFER_WAVAIL(stream);
+			if (pending > bytes) {
+				pending = bytes;
+			}
+			memcpy(stream->__bufpos, buffer, pending);
+			stream->__bufpos += pending;
+			__STDIO_STREAM_VALIDATE(stream);
+			return bytes;
+		}
+
+/* 	RETRY: */
+		if (bytes <= __STDIO_STREAM_BUFFER_WAVAIL(stream)) {
+			memcpy(stream->__bufpos, buffer, bytes);
+			stream->__bufpos += bytes;
+			if (__STDIO_STREAM_IS_LBF(stream)
+				&& memrchr(buffer, '\n', bytes)	/* Search backwards. */
+				) {
+				if ((pending = __STDIO_COMMIT_WRITE_BUFFER(stream)) > 0) {
+					if (pending > bytes) {
+						pending = bytes;
+					}
+					buffer += (bytes - pending);
+					if ((p = memchr(buffer, '\n', pending)) != NULL) {
+						pending = (buffer + pending) - p;
+						bytes -= pending;
+						stream->__bufpos -= pending;
+					}
+				}
+			}
+			__STDIO_STREAM_VALIDATE(stream);
+			return bytes;
+		}
+		/* FBF or LBF and not enough space in buffer. */
+		if (__STDIO_STREAM_BUFFER_WUSED(stream)) { /* Buffered data. */
+			if (__STDIO_COMMIT_WRITE_BUFFER(stream)) { /* Commit failed! */
+				return 0;
+			}
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning CONSIDER: Do we want to try again if data now fits in buffer?
+#endif
+/* 			goto RETRY; */
+		}
+	}
+
+	return __stdio_WRITE(stream, buffer, bytes);
+}
+
+#endif