IABSD.fr/xenocara/xserver/glx/indirect_table.h

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• Author : matthieu
  Date : 2012-06-10 13:21:05
  Hash : e60da745
  Message : Update to xserver 1.12.2. tested by naddy@, krw@, mpi@.

• xserver/glx/indirect_table.h

• /*
   * (C) Copyright IBM Corporation 2005, 2006
   * All Rights Reserved.
   * 
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sub license,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   * 
   * The above copyright notice and this permission notice (including the next
   * paragraph) shall be included in all copies or substantial portions of the
   * Software.
   * 
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
   * IBM,
   * AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
   * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
   * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  
  /**
   * \file indirect_table.h
   *
   * \author Ian Romanick <idr@us.ibm.com>
   */
  
  #ifndef INDIRECT_TABLE_H
  #define INDIRECT_TABLE_H
  
  #include <inttypes.h>
  
  /**
   */
  struct __glXDispatchInfo {
      /**
       * Number of significant bits in the protocol opcode.  Opcodes with values
       * larger than ((1 << bits) - 1) are invalid.
       */
      unsigned bits;
  
      /**
       */
      const int_fast16_t *dispatch_tree;
  
      /**
       * Array of protocol decode and dispatch functions index by the opcode
       * search tree (i.e., \c dispatch_tree).  The first element in each pair
       * is the non-byte-swapped version, and the second element is the
       * byte-swapped version.
       */
      const void *(*dispatch_functions)[2];
  
      /**
       * Pointer to size validation data.  This table is indexed with the same
       * value as ::dispatch_functions.
       *
       * The first element in the pair is the size, in bytes, of the fixed-size
       * portion of the protocol.
       *
       * For opcodes that have a variable-size portion, the second value is an
       * index in \c size_func_table to calculate that size.  If there is no
       * variable-size portion, this index will be ~0.
       *
       * \note
       * If size checking is not to be performed on this type of protocol
       * data, this pointer will be \c NULL.
       */
      const int_fast16_t(*size_table)[2];
  
      /**
       * Array of functions used to calculate the variable-size portion of
       * protocol messages.  Indexed by the second element of the entries
       * in \c ::size_table.
       *
       * \note
       * If size checking is not to be performed on this type of protocol
       * data, this pointer will be \c NULL.
       */
      const gl_proto_size_func *size_func_table;
  };
  
  /**
   * Sentinel value for an empty leaf in the \c dispatch_tree.
   */
  #define EMPTY_LEAF         INT_FAST16_MIN
  
  /**
   * Declare the index \c x as a leaf index.
   */
  #define LEAF(x)            -x
  
  /**
   * Determine if an index is a leaf index.
   */
  #define IS_LEAF_INDEX(x)   ((x) <= 0)
  
  extern const struct __glXDispatchInfo Single_dispatch_info;
  extern const struct __glXDispatchInfo Render_dispatch_info;
  extern const struct __glXDispatchInfo VendorPriv_dispatch_info;
  
  #endif                          /* INDIRECT_TABLE_H */