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8c912eea94
Port JGit's HistogramDiff algorithm over to C. Rough numbers (TODO) show that it is faster than its --patience cousin, as well as the default Meyers algorithm. The implementation has been reworked to use structs and pointers, instead of bitmasks, thus doing away with JGit's 2^28 line limit. We also use xdiff's default hash table implementation (xdl_hash_bits() with XDL_HASHLONG()) for convenience. Signed-off-by: Tay Ray Chuan <rctay89@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
64 lines
1.9 KiB
C
64 lines
1.9 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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(XDIFFI_H)
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#define XDIFFI_H
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typedef struct s_diffdata {
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long nrec;
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unsigned long const *ha;
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long *rindex;
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char *rchg;
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} diffdata_t;
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typedef struct s_xdalgoenv {
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long mxcost;
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long snake_cnt;
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long heur_min;
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} xdalgoenv_t;
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typedef struct s_xdchange {
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struct s_xdchange *next;
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long i1, i2;
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long chg1, chg2;
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} xdchange_t;
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int xdl_recs_cmp(diffdata_t *dd1, long off1, long lim1,
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diffdata_t *dd2, long off2, long lim2,
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long *kvdf, long *kvdb, int need_min, xdalgoenv_t *xenv);
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int xdl_do_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
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xdfenv_t *xe);
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int xdl_change_compact(xdfile_t *xdf, xdfile_t *xdfo, long flags);
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int xdl_build_script(xdfenv_t *xe, xdchange_t **xscr);
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void xdl_free_script(xdchange_t *xscr);
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int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
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xdemitconf_t const *xecfg);
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int xdl_do_patience_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
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xdfenv_t *env);
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int xdl_do_histogram_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
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xdfenv_t *env);
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#endif /* #if !defined(XDIFFI_H) */
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