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view src/s/sunos4-1.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 | 3ecd8885ac67 |
| children |
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/* Synched up with: FSF 19.31. */ #include "sunos4-0.h" /* 4.1.1 makes these system calls interruptible. */ #define INTERRUPTIBLE_OPEN #define INTERRUPTIBLE_CLOSE #define INTERRUPTIBLE_IO /* Cause the compilation of oldxmenu to use the right -I option. */ #define OLDXMENU_OPTIONS CFLAGS=C_SWITCH_SYSTEM #if 0 /* RMSmacs */ FSF says the following, but apparently the HAVE_RES_INIT stuff takes care of it properly? /* #if 0 This isn't right. Apparently some sites do have -lresolv but don't use that. On those systems, the code below loses. There's no way to win automatically unless someone figures out a way of determining automatically which way is right on any given system. */ #endif /* Some systems do not run the Network Information Service, but have modified the shared C library to include resolver support without also changing the C archive library (/usr/lib/libc.a). If we detect the presence of libresolv.a, use -lresolv to supplement libc.a. We used to have #ifdef HAVE_GETHOSTNAME is to prevent configure from setting libsrc_libs to -lresolv in lib-src/Makefile. But nowadays configure is smarter about computing libsrc_libs, and would not be fooled. Anyway, why not use -lresolv in lib-src? */ /* #ifdef HAVE_GETHOSTNAME */ /* XEmacs change: -lresolve should be added only if we have RES_INIT, not if we don't */ #ifdef HAVE_RES_INIT #define LIBS_SYSTEM "-lresolv" #endif /* #endif */ #if 0 /* Not necessary, since SYSTEM_MALLOC is defined in sunos4-0.h. */ /* Tell GNU malloc to compensate for a bug in localtime. */ #define SUNOS_LOCALTIME_BUG #endif /* Define dlopen, dlclose, dlsym. */ #define USE_DL_STUBS /* This appears to be broken on SunOS4.1.[123] */ #define BROKEN_SIGIO