[PATCH] sim: dv-sockser: add a write buffer variant

[Mike Frysinger <vapier@gentoo.org>]

Rather than having to bang out chunks of data one byte at a time over
the socket interface, add a write variant that accepts an arbitrarily
long buffer.  This speeds things up considerably when we have many
chars to send out at once.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

2010-11-16  Mike Frysinger  <vapier@gentoo.org>

	* dv-sockser.c (dv_sockser_write_buffer): New function.
	(dv_sockser_write): Rewrite to use dv_sockser_write_buffer.
	* dv-sockser.h (dv_sockser_write_buffer): New prototype.
---
 sim/common/dv-sockser.c |   15 +++++++++++----
 sim/common/dv-sockser.h |    1 +
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/sim/common/dv-sockser.c b/sim/common/dv-sockser.c
index 640f869..647237d 100644
--- a/sim/common/dv-sockser.c
+++ b/sim/common/dv-sockser.c
@@ -347,13 +347,14 @@ dv_sockser_status (SIM_DESC sd)
 }
 
 int
-dv_sockser_write (SIM_DESC sd, unsigned char c)
+dv_sockser_write_buffer (SIM_DESC sd, const unsigned char *buffer,
+			 unsigned nr_bytes)
 {
   int n;
 
   if (! connected_p (sd))
     return -1;
-  n = write (sockser_fd, &c, 1);
+  n = write (sockser_fd, buffer, nr_bytes);
   if (n == -1)
     {
       if (errno == EPIPE)
@@ -363,9 +364,15 @@ dv_sockser_write (SIM_DESC sd, unsigned char c)
 	}
       return -1;
     }
-  if (n != 1)
+  if (n != nr_bytes)
     return -1;
-  return 1;
+  return nr_bytes;
+}
+
+int
+dv_sockser_write (SIM_DESC sd, unsigned char c)
+{
+  return dv_sockser_write_buffer (sd, &c, 1);
 }
 
 int
diff --git a/sim/common/dv-sockser.h b/sim/common/dv-sockser.h
index 209cf46..0ad071a 100644
--- a/sim/common/dv-sockser.h
+++ b/sim/common/dv-sockser.h
@@ -27,6 +27,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 /* FIXME: later add a device ptr arg */
 extern int dv_sockser_status (SIM_DESC);
 int dv_sockser_write (SIM_DESC, unsigned char);
+int dv_sockser_write_buffer (SIM_DESC, const unsigned char *, unsigned);
 int dv_sockser_read (SIM_DESC);
 
 #endif /* DV_SOCKSER_H */
-- 
1.7.3.1