Merge branch 'sunweaver-pr/nxcomp-autoreconf' into 3.6.x

Attributes GH PR #480: https://github.com/ArcticaProject/nx-libs/pull/480

1 files changed, 194 insertions, 0 deletions

diff --git a/nxcomp/src/CreateGC.cpp b/nxcomp/src/CreateGC.cpp
new file mode 100644
index 000000000..34978de13
--- /dev/null
+++ b/nxcomp/src/CreateGC.cpp
@@ -0,0 +1,194 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine (http://www.nomachine.com)          */
+/* Copyright (c) 2008-2014 Oleksandr Shneyder <o.shneyder@phoca-gmbh.de>  */
+/* Copyright (c) 2014-2016 Ulrich Sibiller <uli42@gmx.de>                 */
+/* Copyright (c) 2014-2016 Mihai Moldovan <ionic@ionic.de>                */
+/* Copyright (c) 2011-2016 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>*/
+/* Copyright (c) 2015-2016 Qindel Group (http://www.qindel.com)           */
+/*                                                                        */
+/* NXCOMP, NX protocol compression and NX extensions to this software     */
+/* are copyright of the aforementioned persons and companies.             */
+/*                                                                        */
+/* Redistribution and use of the present software is allowed according    */
+/* to terms specified in the file LICENSE.nxcomp which comes in the       */
+/* source distribution.                                                   */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/* NOTE: This software has received contributions from various other      */
+/* contributors, only the core maintainers and supporters are listed as   */
+/* copyright holders. Please contact us, if you feel you should be listed */
+/* as copyright holder, as well.                                          */
+/*                                                                        */
+/**************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "CreateGC.h"
+
+#include "ClientCache.h"
+
+#include "EncodeBuffer.h"
+#include "DecodeBuffer.h"
+
+//
+// Set the verbosity level.
+//
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+#undef  DUMP
+
+//
+// Here are the methods to handle messages' content.
+//
+
+int CreateGCStore::parseIdentity(Message *message, const unsigned char *buffer,
+                                     unsigned int size, int bigEndian) const
+{
+  CreateGCMessage *createGC = (CreateGCMessage *) message;
+
+  //
+  // Here is the fingerprint.
+  //
+
+  createGC -> gcontext   = GetULONG(buffer + 4, bigEndian);
+  createGC -> drawable   = GetULONG(buffer + 8, bigEndian);
+  createGC -> value_mask = GetULONG(buffer + 12, bigEndian);
+
+  //
+  // Clear the unused bytes carried in the
+  // payload to increase the effectiveness
+  // of the caching algorithm.
+  //
+
+  if ((int) size > dataOffset)
+  {
+    #ifdef DEBUG
+    *logofs << name() << ": Removing unused bytes from the "
+            << "data payload.\n" << logofs_flush;
+    #endif
+
+    createGC -> value_mask &= (1 << 23) - 1;
+
+    unsigned int mask = 0x1;
+    unsigned char *source = (unsigned char *) buffer + CREATEGC_DATA_OFFSET;
+    unsigned long value = 0;
+
+    for (unsigned int i = 0; i < 23; i++)
+    {
+      if (createGC -> value_mask & mask)
+      {
+        value = GetULONG(source, bigEndian);
+
+        value &= (0xffffffff >> (32 - CREATEGC_FIELD_WIDTH[i]));
+
+        PutULONG(value, source, bigEndian);
+
+        source += 4;
+      }
+
+      mask <<= 1;
+    }
+  }
+
+  #ifdef DEBUG
+  *logofs << name() << ": Parsed identity for message at "
+          << this << ".\n" << logofs_flush;
+  #endif
+
+  return 1;
+}
+
+int CreateGCStore::unparseIdentity(const Message *message, unsigned char *buffer,
+                                       unsigned int size, int bigEndian) const
+{
+  CreateGCMessage *createGC = (CreateGCMessage *) message;
+
+  //
+  // Fill all the message's fields.
+  //
+
+  PutULONG(createGC -> gcontext,   buffer + 4, bigEndian);
+  PutULONG(createGC -> drawable,   buffer + 8, bigEndian);
+  PutULONG(createGC -> value_mask, buffer + 12, bigEndian);
+
+  #ifdef DEBUG
+  *logofs << name() << ": Unparsed identity for message at "
+          << this << ".\n" << logofs_flush;
+  #endif
+
+  return 1;
+}
+
+void CreateGCStore::dumpIdentity(const Message *message) const
+{
+  #ifdef DUMP
+
+  CreateGCMessage *createGC = (CreateGCMessage *) message;
+
+  *logofs << name() << ": Identity gcontext " << createGC -> gcontext << ", drawable "
+                    << createGC -> drawable << ", value_mask " << createGC -> value_mask
+                    << ", size " << createGC -> size_ << ".\n" << logofs_flush;
+  #endif
+}
+
+void CreateGCStore::identityChecksum(const Message *message, const unsigned char *buffer,
+                                         unsigned int size, int bigEndian) const
+{
+  //
+  // This didn't include the drawable
+  // in previous versions.
+  //
+
+  md5_append(md5_state_, buffer + 8, 8);
+}
+
+void CreateGCStore::updateIdentity(EncodeBuffer &encodeBuffer, const Message *message,
+                                       const Message *cachedMessage,
+                                           ChannelCache *channelCache) const
+{
+  CreateGCMessage *createGC       = (CreateGCMessage *) message;
+  CreateGCMessage *cachedCreateGC = (CreateGCMessage *) cachedMessage;
+
+  ClientCache *clientCache = (ClientCache *) channelCache;
+
+  // Since ProtoStep7 (#issue 108)
+  #ifdef TEST
+  *logofs << name() << ": Encoding value " << createGC -> gcontext
+          << " as gcontext field.\n" << logofs_flush;
+  #endif
+
+  encodeBuffer.encodeNewXidValue(createGC -> gcontext, clientCache -> lastId,
+                     clientCache -> lastIdCache, clientCache -> gcCache,
+                         clientCache -> freeGCCache);
+
+  cachedCreateGC -> gcontext = createGC -> gcontext;
+}
+
+void CreateGCStore::updateIdentity(DecodeBuffer &decodeBuffer, const Message *message,
+                                       ChannelCache *channelCache) const
+{
+  CreateGCMessage *createGC = (CreateGCMessage *) message;
+
+  ClientCache *clientCache = (ClientCache *) channelCache;
+
+  unsigned int value;
+
+  // Since ProtoStep7 (#issue 108)
+  decodeBuffer.decodeNewXidValue(value, clientCache -> lastId,
+                     clientCache -> lastIdCache, clientCache -> gcCache,
+                         clientCache -> freeGCCache);
+
+  createGC -> gcontext = value;
+
+  #ifdef TEST
+  *logofs << name() << ": Decoded value " << createGC -> gcontext
+          << " as gcontext field.\n" << logofs_flush;
+  #endif
+}