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