(compile_pattern_1): New arg `posix'. Controls the syntax spec
for parsing; also record it in the cache.
(compile_pattern): New arg `posix'.
(looking_at_1, string_match_1, fast_string_match): Pass 0 for new arg.
(search_buffer): New arg `posix'. Now static.
(search_command): New arg `posix'. All callers changed.
(Fposix_search_forward, Fposix_search_backward): New functions.
(string_match_1, looking_at_1): New subroutines broken out.
(Fstring_match, Flooking_at): Use them.
(Fposix_string_match, Fposix_looking_at): New functions.
(syms_of_search): defsubr new functions.
Lisp_Window_Configuration as obsolete.
(PSEUDOVECTOR_FLAG, PSEUDOVECTOR_SIZE_MASK, PVEC_BUFFER, PVEC_PROCESS,
PVEC_FRAME, PVEC_COMPILED, PVEC_WINDOW, PVEC_WINDOW_CONFIGURATION): New
constants.
(XSETPSEUDOVECTOR, PSEUDOVECTORP, VECTORLIKEP): New macros.
(XSETVECTOR, XSETWINDOW_CONFIGURATION, VECTORP, WINDOW_CONFIGURATIONP): Use
the new convention.
(XSETCOMPILED): New macro.
is compiled if this is defined. The new functions and variables
added #ifdef ETAGS_REGEXP are not listed in this ChangeLog.
[VMS]: All VMS specific code previously contained in
etags-vmslib.c is now included here, modified for dealing with
language and regex options intermixed with filenames.
(header_file): Global variable deleted.
(Lang_Function): New typedef. All language parser functions
changed to this new type.
(string_numeric_p, substr, prestr): Functions deleted.
(readline_internal): Does the job that readline did previously.
(longopts): --language and --regex options added.
(lang_names, lang_extensions, lang_func, print_language_names):
New structures, variables and functions for choosing languages.
(print_help): Help strings updated. Calls print_language_names.
(argument_type, ARGUMENT): Typedefs for dealing with language and
regex options intermixed with filenames.
(main): Changed the way of dealing with arguments on the command
line to deal with language and regex options intermixed with
filenames.
(get_language, default_C_entries, Cplusplus_entries,
Cstar_entries, Yacc_entries, just_read_file): New functions.
(find_entries): Use the new method for choosing the language.
(Pascal_functions): Allow intermixing of comment styles.
(prolog_getit, skip_comment): Rewritten for speed.
(readline): Rewritten to deal with regexps.
