Mercurial > hg > xemacs-beta
view src/s/isc2-2.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 | c69610198c35 |
| children |
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/* Synched up with: FSF 19.31. */ /* system description file for Interactive (ISC) Unix version 2.2 on the 386. */ #include "usg5-3.h" /* select (in -linet) works okay on X ptys, but not on the serial port. karl@cs.umb.edu says that with that select call, subprocesses made by (e.g.) M-x grep don't exit cleanly, they just hang. Similar problems have been observed in ISC 3.0. */ #define BROKEN_SELECT_NON_X /* karl@cs.umb.edu says that ISC's socket support (in -linet) isn't what Emacs needs; it makes interrupt-shell-subjob and the like do nothing. But that appears to have been another manifestation of the broken select, so it should now be safe to define this again. */ #define HAVE_SOCKETS #define NO_SOCKETS_IN_FILE_SYSTEM #define NEED_NET_ERRNO_H /* This keeps the .cdbx section that gcc puts out when generating stabs-in-coff output, so Emacs can be debugged. --karl@cs.umb.edu. */ #define USG_SHARED_LIBRARIES #define NO_FCHMOD #define MAXNAMLEN 512 #define O_NDELAY O_NONBLOCK #define MEMORY_IN_STRING_H /* Tell gmalloc.c that we don't have memmove (system include files to the contrary!). */ #define MEMMOVE_MISSING /* -lPW is only needed if not using Gcc. We used to include -lcposix here for the rename function, but some people say ISC's rename doesn't work correctly with Emacs so we use Emacs' emulation instead. */ #if defined (__GNUC__) # define LIB_STANDARD_1 -lcposix #else /* !__GNUC__ */ # define LIB_STANDARD_1 -lPW #endif /* !__GNUC__ */ /* LIB_STANDARD_1 is used both here and in LIBS_SYSTEM (the latter for the sake of configure). */ #define LIB_STANDARD LIB_STANDARD_1 -lc #define NO_X_DESTROY_DATABASE /* -linet may be needed to avoid undefined symbols such as gethostname, inet_addr, gethostbyname, socket, connect, ... */ #define LIBS_SYSTEM -linet LIB_STANDARD_1 /* Inhibit asm code in netinet/in.h. Strictly speaking, only necessary when -traditional is being used, but it doesn't hurt to unconditionally define this. */ #define NO_ASM /* -traditional is not necessary if the system header files are fixed to define getc and putc in the absence of _POSIX_SOURCE. GCC's from 2.4.4 on do this. */ #if !defined (__GNUC__) || __GNUC__ < 2 # define C_SWITCH_SYSTEM "-traditional" #endif /* Some versions of ISC are said to define S_IFLNK even tho they don't really support symlinks. */ #undef S_IFLNK