Mercurial > hg > xemacs-beta
view modules/zlib/zlib.c @ 4407:4ee73bbe4f8e
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 | 3ecd8885ac67 |
| children | 308d34e9f07d |
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/* zlib interface for XEmacs. Copyright (C) 1998 Free Software Foundation, Inc. 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. */ /* Author: William Perry <wmperry@aventail.com> */ #include <emodules.h> DEFUN ("compress", Fcompress, 1, 6, 0, /* Return the compressed version of an object. OBJECT is either a string or a buffer. Optional argument LEVEL specifies how much to compress - valid range is 0 - 9. Optional arguments START and END denote buffer positions for compressing a portion of OBJECT. The optional CODING argument specifies the coding system the text is to be represented in while computing the digest. This only has meaning with MULE, and defaults to the current format of the data. If ERROR-ME-NOT is nil, report an error if the coding system can't be determined. Else assume binary coding if all else fails. */ (object, level, start, end, coding, error_me_not)) { return(Qnil); } DEFUN ("decompress", Fdecompress, 1, 5, 0, /* Uncompress an object. OBJECT is either a string or a buffer. Optional arguments START and END denote buffer positions for decompressing a portion of OBJECT. The optional CODING argument specifies the coding system the text is to be represented in while computing the digest. This only has meaning with MULE, and defaults to the current format of the data. If ERROR-ME-NOT is nil, report an error if the coding system can't be determined. Else assume binary coding if all else fails. */ (object, start, end, coding, error_me_not)) { return(Qnil); } void syms_of_zlib (void) { DEFSUBR(Fcompress); DEFSUBR(Fdecompress); } void vars_of_zlib (void) { Fprovide (intern ("zlib")); }