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Always use boyer_moore in ASCII or Latin-1 buffers with ASCII search strings. 2007-12-26 Aidan Kehoe <kehoea@parhasard.net> * casetab.c: Extend and correct some case table documentation. * search.c (search_buffer): Correct a bug where only the first entry for a character in the case equivalence table was examined in determining if the Boyer-Moore search algorithm is appropriate. If there are case mappings outside of the charset and row of the characters specified in the search string, those case mappings can be safely ignored (and Boyer-Moore search can be used) if we know from the buffer statistics that the corresponding characters cannot occur. * search.c (boyer_moore): Assert that we haven't been passed a string with varying characters sets or rows within character sets. That's what simple_search is for. In the very rare event that a character in the search string has a canonical case mapping that is not in the same character set and row, don't try to search for the canonical character, search for some other character that is in the the desired character set and row. Assert that the case table isn't corrupt. Do not search for any character case mappings that cannot possibly occur in the buffer, given the buffer metadata about its contents.
author Aidan Kehoe <kehoea@parhasard.net>
date Wed, 26 Dec 2007 17:30:16 +0100
parents 1e7cc382eb16
children e0db3c197671
line wrap: on
line source

/* XEmacs routines to deal with range tables.
   Copyright (C) 1995 Sun Microsystems, Inc.
   Copyright (C) 1995, 2004 Ben Wing.

This file is part of XEmacs.

XEmacs is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.

XEmacs 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 General Public License
for more details.

You should have received a copy of the GNU General Public License
along with XEmacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Synched up with: Not in FSF. */

/* Extracted from rangetab.c by O. Galibert, 1998. */

#ifndef INCLUDED_rangetab_h_
#define INCLUDED_rangetab_h_

typedef struct range_table_entry range_table_entry;
struct range_table_entry
{
  EMACS_INT first;
  EMACS_INT last;
  Lisp_Object val;
};

typedef struct
{
  Dynarr_declare (range_table_entry);
} range_table_entry_dynarr;

enum range_table_type
{
  RANGE_START_CLOSED_END_OPEN,
  RANGE_START_CLOSED_END_CLOSED,
  RANGE_START_OPEN_END_CLOSED,
  RANGE_START_OPEN_END_OPEN
};

struct Lisp_Range_Table
{
  struct LCRECORD_HEADER header;
  range_table_entry_dynarr *entries;
  enum range_table_type type;
};
typedef struct Lisp_Range_Table Lisp_Range_Table;

DECLARE_LRECORD (range_table, Lisp_Range_Table);
#define XRANGE_TABLE(x) XRECORD (x, range_table, Lisp_Range_Table)
#define wrap_range_table(p) wrap_record (p, range_table)
#define RANGE_TABLEP(x) RECORDP (x, range_table)
#define CHECK_RANGE_TABLE(x) CHECK_RECORD (x, range_table)

#endif /* INCLUDED_rangetab_h_ */