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/*
* (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 */
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