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c27afcbfd0
Prior to commit 6a26019c81 (xdiff: split xrecord_t.ha into line_hash
and minimal_perfect_hash, 2025-11-18) the "ha" field of xrecord_t
initially held the "line_hash" value and once the line had been
interned that field was updated to hold the "minimal_perfect_hash". The
"line_hash" is only used to intern the line so there is no point in
storing it after all the input lines have been interned.
Removing the "line_hash" field from xrecord_t and storing it in
xdlclass_t where it is actually used makes it clearer that it is a
temporary value and it should not be used once we're calculated the
"minimal_perfect_hash". This also reduces the size of xrecord_t by 25%
on 64-bit platforms and 40% on 32-bit platforms. While the struct is
small we create one instance per input line so any saving is welcome.
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/*
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* LibXDiff by Davide Libenzi ( File Differential Library )
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* Copyright (C) 2003 Davide Libenzi
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Davide Libenzi <davidel@xmailserver.org>
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*
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*/
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#if !defined(XTYPES_H)
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#define XTYPES_H
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typedef struct s_chanode {
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struct s_chanode *next;
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long icurr;
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} chanode_t;
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typedef struct s_chastore {
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chanode_t *head, *tail;
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long isize, nsize;
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chanode_t *ancur;
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chanode_t *sncur;
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long scurr;
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} chastore_t;
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typedef struct s_xrecord {
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uint8_t const *ptr;
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size_t size;
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size_t minimal_perfect_hash;
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} xrecord_t;
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typedef struct s_xdfile {
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xrecord_t *recs;
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size_t nrec;
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ptrdiff_t dstart, dend;
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bool *changed;
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size_t *reference_index;
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size_t nreff;
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} xdfile_t;
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typedef struct s_xdfenv {
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xdfile_t xdf1, xdf2;
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} xdfenv_t;
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#endif /* #if !defined(XTYPES_H) */
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