(struct re_pattern_buffer): Remove newline_anchor.
* regex.c: Keep namespace clean for GNU libc by renaming <fun>
to __<fun> and using `weak_alias (__<fun>, <fun>)'.
(re_max_failures, fail_stack): Use size_t rather than unsigned.
(regex_compile): For ^ and $, choose between buffer and line (beg|end)
depending on the new RE_NO_NEWLINE_ANCHOR syntax flag.
(print_compiled_pattern, re_search_2, mutually_exclusive_p)
(re_match_2_internal, re_compile_pattern, re_comp, regcomp):
Get rid of references to newline_anchor.
(regcomp): Allocate and precompute a fastmap.
(PTR_TO_OFFSET, POS_AS_IN_BUFFER): Move to a better place.
(ISDIGIT, ISCNTRL, ISXDIGIT) [!emacs]: Remove duplicate definition.
(regex_compile): Use RE_FRUGAL instead of RE_ALL_GREEDY.
(re_compile_pattern): Use size_t for length.
(init_syntax_once): Move to a better place.
* regex.h: Merge changes from GNU libc. Indent cpp directives.
(RE_FRUGAL): Replaces RE_ALL_GREEDY (inverted meaning).
(RE_MULTIBYTE_P, RE_STRING_CHAR_AND_LENGTH): New macros.
(GET_CHAR_BEFORE_2): Moved from charset.h plus fixed minor bug when
we are between str1 and str2.
(MAX_MULTIBYTE_LENGTH, CHAR_STRING) [!emacs]: Provide trivial default.
(PATFETCH): Use `TRANSLATE'.
(PATFETCH_RAW): Fetch multibyte char if applicable.
(PATUNFETCH): Remove.
(regex_compile): Rely on PATFETCH to do most of the multibyte magic.
When writing a char, write it directly into the pattern buffer rather
than going needlessly through a temp char-array.
(re_match_2_internal): Similarly, rely on RE_STRING_CHAR to do the
multibyte magic and remove the useless `#ifdef emacs'.
(bcmp_translate): Don't compare as multibyte chars when in a unibyte
buffer.
* regex.h (struct re_pattern_buffer): Make field `multibyte'
conditional on `emacs'.
* charset.h (GET_CHAR_BEFORE_2): Moved to regex.c.
to Emacs' syntax. Also fix the comment about set/not-set meanings
since Emacs syntax is not the value 0 any more.
* search.c (compile_pattern_1): Remove RE_CHAR_CLASSES from the syntax
since it's now part of RE_SYNTAX_EMACS.
