This is in preparation for using Gnulib regex for etags,
to avoid collisions in include directives.
* src/regex-emacs.c: Rename from src/regex.c.
* src/regex-emacs.h: Rename from src/regex.h.  All uses changed.
* test/src/regex-emacs-tests.el: Rename from test/src/regex-tests.el.

On my platform (Fedora 28 x86-64, AMD Phenom II X4 910e) this sped
up a SAFE_FREE-using microbenchmark (string-distance "abc" "abc")
by about 18%, and shrank the Emacs text size by about 0.1%.
* src/callint.c (Fcall_interactively):
* src/callproc.c (call_process):
* src/doc.c (get_doc_string, Fsnarf_documentation):
* src/editfns.c (Freplace_buffer_contents):
* src/emacs-module.c (funcall_module):
* src/eval.c (Flet):
* src/process.c (Fmake_process):
* src/term.c (tty_menu_show):
* src/xdisp.c (safe__call):
* src/xmenu.c (x_menu_show):
Use SAFE_FREE_UNBIND_TO.
* src/data.c (wrong_choice): No need to call SAFE_FREE here.
* src/lisp.h (USE_SAFE_ALLOCA):
* src/regex.c (REGEX_USE_SAFE_ALLOCA):
Do not declare sa_must_free local; no longer needed.
All uses removed.
(SAFE_FREE): Rewrite in terms of safe_free.
(safe_free): New function, optimized to use xfree.
(SAFE_FREE_UNBIND_TO): New macro.
(safe_free_unbind_to): New function.

* src/lisp.h (compile_pattern): Remove prototype of
now-internal function.

* src/regex.c (POS_AS_IN_BUFFER): Consult gl_state instead of
re_match_object: the latter can change in Lisp.
(re_match_2_internal): Switch back to UPDATE_SYNTAX_* FROM
UPDATE_SYNTAX_FAST*, allowing calls into Lisp.

* src/regex.h (re_match_object): Uncomment declaration.

* src/search.c (struct regexp_cache): Add `busy' field.
(thaw_buffer_relocation): Delete; rely on unbind.
(compile_pattern_1): Assert pattern isn't busy.
(shrink_regexp_cache): Don't shrink busy patterns.
(clear_regexp_cache): Don't nuke busy patterns.
(unfreeze_pattern, freeze_pattern): New functions.
(compile_pattern): Return a regexp_cache pointer instead of the
re_pattern_buffer, allowing callers to use `freeze_pattern' if
needed.  Do not consider busy patterns as cache hit candidates;
error if we run out of non-busy cache entries.
(looking_at_1, fast_looking_at): Snapshot
Vinhibit_changing_match_data; mark pattern busy while we're
matching it; unbind.
(string_match_1, fast_string_match_internal)
(fast_c_string_match_ignore_case): Adjust for compile_pattern
return type.
(search_buffer_re): Regex code from old search_buffer moved here;
snapshot Vinhibit_changing_match_data; mark pattern busy while
we're matching it; unbind.
(search_buffer_non_re): Non-regex code from old search_buffer
moved here.
(search_buffer): Split into search_buffer_re,
search_buffer_non_re.
(syms_of_search): Staticpro re_match_object, even though we really
shouldn't have to.

* src/syntax.h (UPDATE_SYNTAX_TABLE_FORWARD_FAST):
(UPDATE_SYNTAX_TABLE_FAST): Remove.

* src/thread.h (struct thread_state): Remove m_re_match_object,
which is global again.  (It never needs to be preserved across
thread switch.)

* configure.ac: Do not use GCC 8’s new -Wcast-align flag.
* lib-src/ebrowse.c (xmalloc):
* lib-src/emacsclient.c (xmalloc, xstrdup):
* lib-src/etags.c (xmalloc):
* lib-src/make-docfile.c (xmalloc):
* lib-src/movemail.c (xmalloc):
* src/dispnew.c (new_glyph_pool):
* src/regex.c (xmalloc):
* src/term.c (tty_menu_create):
* src/tparam.h (tparam):
Use ATTRIBUTE_MALLOC.  Also see GCC bug 85562.
* lib-src/emacsclient.c (fail):
Do not dereference a null pointer.
* src/frame.c (delete_frame):
Add a decl with UNINIT to work around GCC bug 85563.
* src/menu.h (finish_menu_items):
Do not use attribute const.
* src/regex.c (analyze_first): Use FALLTHROUGH, not a comment.

e5a2933 (origin/emacs-26) lisp/vc/: documentation fixes
f21f8e6 Document 'desktop-files-not-to-save'
d8917eb Improve documentation of Profiling features
b228839 Improve indexing of "performance" in ELisp manual
ab67b3e Minor change in Emacs manual's VC chapter
c352434 Avoid memory corruption with specpdl overflow + edebug (Bug#3...
593bbda Document comment-fill-column in the manual (Bug#11636)
bd4cc8d * doc/emacs/dired.texi (Marks vs Flags): Copyedits.
69107f3 ; Fix doc typos related to indefinite articles
aaad1e6 Merge branch 'emacs-26' of git.savannah.gnu.org:/srv/git/emac...
5906418 More fixes for the Emacs manual
9ab3df1 ; Fix doc typos related to indefinite articles
66a4e65 ; Fix doc typos related to indefinite articles
35e5c57 ; Fix doc typos related to indefinite articles

* src/regex.h (RE_DUP_MAX): Raise limit to 2^16-1.
* etc/NEWS: Announce it.
* doc/lispref/searching.texi (Regexp Backslash): Document it.
* test/src/regex-tests.el (regex-repeat-limit): Test it.

* src/regex.h (reg_errcode_t): Add REG_ESIZEBR code.
* src/regex.c (re_error_msgid): Add corresponding entry.
(GET_INTERVAL_COUNT): Return it instead of the more generic REG_EBADBR
when encountering a repetition greater than RE_DUP_MAX.

* lisp/isearch.el (isearch-search): Don't convert errors starting with
"Invalid" into "incomplete".  Such errors are not incomplete, in the
sense that they cannot be corrected by appending more characters to
the end of the regexp.  The affected error messages are:

- REG_BADPAT "Invalid regular expression"
  - \\(?X:\\) where X is not a legal group number
  - \\_X where X is not < or >

- REG_ECOLLATE "Invalid collation character"
  - There is no code to throw this.

- REG_ECTYPE "Invalid character class name"
  - [[:foo:] where foo is not a valid class name

- REG_ESUBREG "Invalid back reference"
  - \N where N is referenced before matching group N

- REG_BADBR "Invalid content of \\{\\}"
  - \\{N,M\\} where N < 0, M < N, M or N larger than max
  - \\{NX where X is not a digit or backslash
  - \\{N\\X where X is not a }

- REG_ERANGE "Invalid range end"
  - There is no code to throw this.

- REG_BADRPT "Invalid preceding regular expression"
  - We never throw this.  It would usually indicate a "*" with no
    preceding regexp text, but Emacs allows that to match a literal
    "*".

63b04c11d5 Fix copyright years by hand
5c7dd8a783 Update copyright year to 2018
220a9ecba1 Merge from Gnulib
312c565566 Don't add empty keyboard macro to macro ring (Bug#24992)
39ca289a7a Allow customization of decoding of "man" command
f8240815ea * etc/NEWS: Add security consideration note on passphrase ...
0c78822c70 Fix subtle problem with scroll-down when scroll-margin is ...
acd289c5a4 Fix problems with indexing in User manual
b240c7846b * lisp/help.el (describe-key): Only (copy-sequence elt) wh...
e879a5444a * src/buffer.c (Frestore_buffer_modified_p): Fix bug#29846
81b1028b63 Improve documentation of 'inhibit-modification-hooks' and ...
7175496d7a Fix doc string of 'enable-recursive-minibuffers'
5b38406491 Fix documentation of delsel and of killing text

# Conflicts:
#	etc/NEWS
#	etc/refcards/ru-refcard.tex

Run admin/update-copyright.

Emacs has not been portable to MSVC for some time (Bug#29040#57).
* admin/CPP-DEFINES (_MSC_VER): Remove.
* src/lisp.h (ENUM_BF, DEFUN):
* src/regex.c (re_char):
Simplify by assuming _MSC_VER is not defined.
* src/regex.c (const_re_char): Remove.
All uses replaced by re_char.