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From 4c2f805375c0dc66cdd2a30b29c03021833e02ca Mon Sep 17 00:00:00 2001
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From: "Daniel P. Berrange" <berrange@redhat.com>
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Date: Thu, 8 Feb 2018 17:50:19 +0100
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Subject: [PATCH 05/27] buffer: add buffer_move_empty
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RH-Author: Daniel P. Berrange <berrange@redhat.com>
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Message-id: <20180208175041.5634-6-berrange@redhat.com>
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Patchwork-id: 78934
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O-Subject: [RHEL-7.5 qemu-kvm PATCH v1 05/27] buffer: add buffer_move_empty
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Bugzilla: 1527405
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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RH-Acked-by: Gerd Hoffmann <kraxel@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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From: Gerd Hoffmann <kraxel@redhat.com>
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Reviewed-by: Peter Lieven <pl@kamp.de>
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Reviewed-by: Daniel Berrange <berrange@redhat.com>
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Message-id: 1446203414-4013-4-git-send-email-kraxel@redhat.com
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(cherry picked from commit 4d1eb5fdb141c9100eb82e1dc7d4547fb1decd8b)
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Conflicts:
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include/qemu/buffer.h
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util/buffer.c - APIs are still in vnc.{c,h}
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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ui/vnc.c | 15 +++++++++++++++
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ui/vnc.h | 1 +
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2 files changed, 16 insertions(+)
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diff --git a/ui/vnc.c b/ui/vnc.c
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index 9047862..b520f58 100644
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--- a/ui/vnc.c
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+++ b/ui/vnc.c
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@@ -516,6 +516,21 @@ void buffer_advance(Buffer *buf, size_t len)
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buf->offset -= len;
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}
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+void buffer_move_empty(Buffer *to, Buffer *from)
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+{
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+ assert(to->offset == 0);
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+
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+ g_free(to->buffer);
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+ to->offset = from->offset;
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+ to->capacity = from->capacity;
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+ to->buffer = from->buffer;
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+
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+ from->offset = 0;
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+ from->capacity = 0;
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+ from->buffer = NULL;
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+}
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+
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+
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static void vnc_desktop_resize(VncState *vs)
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{
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if (vs->csock == -1 || !vnc_has_feature(vs, VNC_FEATURE_RESIZE)) {
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diff --git a/ui/vnc.h b/ui/vnc.h
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index d1badbb..c300660 100644
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--- a/ui/vnc.h
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+++ b/ui/vnc.h
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@@ -548,6 +548,7 @@ void buffer_free(Buffer *buffer);
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void buffer_append(Buffer *buffer, const void *data, size_t len);
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void buffer_advance(Buffer *buf, size_t len);
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uint8_t *buffer_end(Buffer *buffer);
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+void buffer_move_empty(Buffer *to, Buffer *from);
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/* Misc helpers */
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--
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1.8.3.1
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