upstream/mercurial-mirror Files · mercurial/thirdparty/xdiff/xutils.h

branchcache: add a "pure topological head" fast path...

branchcache: add a "pure topological head" fast path In a narrow but actually quick common case, all topological heads are all on the same branch and all open. In this case, computing the branch map is very simple. We can quickly detect situation where this situation will not change. So we update the V3 format to be able to express this situation and upgrade the update code to detect we remains in that mode. The branch cache is populated with the actual value when the branch map is accessed, but the update_disk method can do the update without needing to populate it.

Jun Wu - - Load All Authors

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             xutils.h
        
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      /*

       *  LibXDiff by Davide Libenzi ( File Differential Library )

       *  Copyright (C) 2003  Davide Libenzi

       *

       *  This library is free software; you can redistribute it and/or

       *  modify it under the terms of the GNU Lesser General Public

       *  License as published by the Free Software Foundation; either

       *  version 2.1 of the License, or (at your option) any later version.

       *

       *  This library is distributed in the hope that it will be useful,

       *  but WITHOUT ANY WARRANTY; without even the implied warranty of

       *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

       *  Lesser General Public License for more details.

       *

       *  You should have received a copy of the GNU Lesser General Public

       *  License along with this library; if not, see

       *  <http://www.gnu.org/licenses/>.

       *

       *  Davide Libenzi <davidel@xmailserver.org>

       *

       */

      #if !defined(XUTILS_H)

      #define XUTILS_H

      int64_t xdl_bogosqrt(int64_t n);

      int xdl_cha_init(chastore_t *cha, int64_t isize, int64_t icount);

      void xdl_cha_free(chastore_t *cha);

      void *xdl_cha_alloc(chastore_t *cha);

      int64_t xdl_guess_lines(mmfile_t *mf, int64_t sample);

      int xdl_recmatch(const char *l1, int64_t s1, const char *l2, int64_t s2);

      uint64_t xdl_hash_record(char const **data, char const *top);

      unsigned int xdl_hashbits(int64_t size);

      #endif /* #if !defined(XUTILS_H) */

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				/*
				* LibXDiff by Davide Libenzi ( File Differential Library )
				* Copyright (C) 2003 Davide Libenzi
				*
				* This library is free software; you can redistribute it and/or
				* modify it under the terms of the GNU Lesser General Public
				* License as published by the Free Software Foundation; either
				* version 2.1 of the License, or (at your option) any later version.
				*
				* This library is distributed in the hope that it will be useful,
				* but WITHOUT ANY WARRANTY; without even the implied warranty of
				* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
				* Lesser General Public License for more details.
				*
				* You should have received a copy of the GNU Lesser General Public
				* License along with this library; if not, see
				* <http://www.gnu.org/licenses/>.
				*
				* Davide Libenzi <davidel@xmailserver.org>
				*
				*/

				#if !defined(XUTILS_H)
				#define XUTILS_H



				int64_t xdl_bogosqrt(int64_t n);
				int xdl_cha_init(chastore_t *cha, int64_t isize, int64_t icount);
				void xdl_cha_free(chastore_t *cha);
				void xdl_cha_alloc(chastore_t cha);
				int64_t xdl_guess_lines(mmfile_t *mf, int64_t sample);
				int xdl_recmatch(const char l1, int64_t s1, const char l2, int64_t s2);
				uint64_t xdl_hash_record(char const *data, char const top);
				unsigned int xdl_hashbits(int64_t size);



				#endif /* #if !defined(XUTILS_H) */