From a6a18ae9af43f870c82836ec0c9b486db6e58b15 Mon Sep 17 00:00:00 2001
From: Michael Brown <mcb30@etherboot.org>
Date: Mon, 28 May 2007 20:09:44 +0000
Subject: [PATCH] Add xfer_[v]printf() functions.

---
 src/core/xfer.c         | 41 +++++++++++++++++++++++++++++++++++++++++
 src/include/gpxe/xfer.h |  4 ++++
 2 files changed, 45 insertions(+)

diff --git a/src/core/xfer.c b/src/core/xfer.c
index 54377c70..2250687e 100644
--- a/src/core/xfer.c
+++ b/src/core/xfer.c
@@ -17,6 +17,7 @@
  */
 
 #include <string.h>
+#include <stdio.h>
 #include <errno.h>
 #include <gpxe/xfer.h>
 
@@ -221,6 +222,46 @@ int xfer_deliver_raw ( struct xfer_interface *xfer,
 	return rc;
 }
 
+/**
+ * Deliver formatted string
+ *
+ * @v xfer		Data transfer interface
+ * @v format		Format string
+ * @v args		Arguments corresponding to the format string
+ * @ret rc		Return status code
+ */
+int xfer_vprintf ( struct xfer_interface *xfer, const char *format,
+		   va_list args ) {
+	size_t len;
+	va_list args_tmp;
+
+	va_copy ( args_tmp, args );
+	len = vsnprintf ( NULL, 0, format, args );
+	{
+		char buf[len + 1];
+		vsnprintf ( buf, sizeof ( buf ), format, args_tmp );
+		return xfer_deliver_raw ( xfer, buf, len );
+	}
+}
+
+/**
+ * Deliver formatted string
+ *
+ * @v xfer		Data transfer interface
+ * @v format		Format string
+ * @v ...		Arguments corresponding to the format string
+ * @ret rc		Return status code
+ */
+int xfer_printf ( struct xfer_interface *xfer, const char *format, ... ) {
+	va_list args;
+	int rc;
+
+	va_start ( args, format );
+	rc = xfer_vprintf ( xfer, format, args );
+	va_end ( args );
+	return rc;
+}
+
 /****************************************************************************
  *
  * Helper methods
diff --git a/src/include/gpxe/xfer.h b/src/include/gpxe/xfer.h
index e6c896c3..f946ab1c 100644
--- a/src/include/gpxe/xfer.h
+++ b/src/include/gpxe/xfer.h
@@ -143,6 +143,10 @@ extern int xfer_deliver_iob ( struct xfer_interface *xfer,
 			      struct io_buffer *iobuf );
 extern int xfer_deliver_raw ( struct xfer_interface *xfer,
 			      const void *data, size_t len );
+extern int xfer_vprintf ( struct xfer_interface *xfer,
+			  const char *format, va_list args );
+extern int xfer_printf ( struct xfer_interface *xfer,
+			 const char *format, ... );
 
 extern void ignore_xfer_close ( struct xfer_interface *xfer, int rc );
 extern int ignore_xfer_vredirect ( struct xfer_interface *xfer,