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58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
/*
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* Copyright (c) 2018, Conor McCarthy
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* All rights reserved.
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*
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* This source code is licensed under both the BSD-style license (found in the
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* LICENSE file in the root directory of this source tree) and the GPLv2 (found
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* in the COPYING file in the root directory of this source tree).
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* You may select, at your option, one of the above-listed licenses.
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*/
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#include "mem.h" /* U32, U64 */
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#include "fl2_threading.h"
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#include "fl2_internal.h"
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#include "radix_internal.h"
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#undef MIN
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#define MIN(a,b) ((a) < (b) ? (a) : (b))
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#define RMF_BITPACK
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#define RADIX_MAX_LENGTH BITPACK_MAX_LENGTH
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#define InitMatchLink(pos, link) tbl->table[pos] = link
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#define GetMatchLink(link) (tbl->table[link] & RADIX_LINK_MASK)
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#define GetInitialMatchLink(pos) tbl->table[pos]
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#define GetMatchLength(pos) (tbl->table[pos] >> RADIX_LINK_BITS)
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#define SetMatchLink(pos, link, length) tbl->table[pos] = (link) | ((U32)(length) << RADIX_LINK_BITS)
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#define SetMatchLength(pos, link, length) tbl->table[pos] = (link) | ((U32)(length) << RADIX_LINK_BITS)
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#define SetMatchLinkAndLength(pos, link, length) tbl->table[pos] = (link) | ((U32)(length) << RADIX_LINK_BITS)
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#define SetNull(pos) tbl->table[pos] = RADIX_NULL_LINK
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#define IsNull(pos) (tbl->table[pos] == RADIX_NULL_LINK)
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BYTE* RMF_bitpackAsOutputBuffer(FL2_matchTable* const tbl, size_t const pos)
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{
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return (BYTE*)(tbl->table + pos);
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}
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/* Restrict the match lengths so that they don't reach beyond pos */
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void RMF_bitpackLimitLengths(FL2_matchTable* const tbl, size_t const pos)
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{
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DEBUGLOG(5, "RMF_limitLengths : end %u, max length %u", (U32)pos, RADIX_MAX_LENGTH);
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SetNull(pos - 1);
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for (U32 length = 2; length < RADIX_MAX_LENGTH && length <= pos; ++length) {
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U32 const link = tbl->table[pos - length];
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if (link != RADIX_NULL_LINK)
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tbl->table[pos - length] = (MIN(length, link >> RADIX_LINK_BITS) << RADIX_LINK_BITS) | (link & RADIX_LINK_MASK);
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}
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}
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#include "radix_engine.h" |