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view src/m/vax.h @ 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 | ecf1ebac70d8 |
| children |
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/* machine description file for vax. Copyright (C) 1985, 1986 Free Software Foundation, Inc. This file is part of GNU Emacs. GNU Emacs 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. GNU Emacs 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: FSF 19.31. */ /* The following line tells the configuration script what sort of operating system this machine is likely to run. USUAL-OPSYS="note" NOTE-START The vax (-machine=vax) runs zillions of different operating systems. Vax running Berkeley Unix (-opsystem=bsd4-1, -opsystem=bsd4-2 or -opsystem=bsd4-3) Works. Vax running Ultrix (-opsystem=bsd4-2) Works. See under Ultrix in share-lib/MACHINES for problems using X windows on Ultrix. Vax running System V rel 2 (-opsystem=usg5-2) 18.27 Works. Vax running System V rel 0 (-opsystem=usg5-0) Works as of 18.36. Vax running VMS (-opsystem=vms) 18.36 believed to work. Addition of features is necessary to make this Emacs version more usable. NOTE-END */ /* #define vax -- appears to be done automatically */ /* crt0.c should use the vax-bsd style of entry, with no dummy args. */ #define CRT0_DUMMIES /* crt0.c should define a symbol `start' and do .globl with a dot. */ #define DOT_GLOBAL_START #ifdef BSD /* USG systems I know of running on Vaxes do not actually support the load average, so disable it for them. */ /* Data type of load average, as read out of kmem. */ #define LOAD_AVE_TYPE double /* Convert that into an integer that is 100 for a load average of 1.0 */ #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0)) #endif /* BSD */ /* Vax sysV has alloca in the PW library. */ #ifdef USG #define LIB_STANDARD "-lPW -lc" /* There is some bug in unexec in for usg 5.2 on a vax which nobody who runs such a system has yet tracked down. */ #ifndef USG5_0 #define NO_REMAP #endif /* USG 5_0 */ #define TEXT_START 0 #endif /* USG */ #ifdef BSD4_2 #define HAVE_FTIME #endif