unibyte chars to multibyte.
(back_comment): Likewise.
(scan_words): Likewise.
(skip_chars): The arg syntaxp is deleted, and the code for
handling syntaxes is moved to skip_syntaxes. Callers changed.
Fix the case that the multibyteness of STRING and the current
buffer doesn't match.
(skip_syntaxes): New function.
(SYNTAX_WITH_MULTIBYTE_CHECK): Check C by ASCII_CHAR_P, not by
SINGLE_BYTE_CHAR_P.
(Fforward_comment): Use FETCH_CHAR_AS_MULTIBYTE to convert unibyte
chars to multibyte.
(scan_lists): Likewise.
(Fbackward_prefix_chars): Likewise.
(scan_sexps_forward): Likewise.
the regexp pattern and the matching target. Set cp->buf.multibyte
to the multibyteness of the regexp pattern. Set
cp->but.target_multibyte to the multibyteness of the matching
target.
(wordify): Use FETCH_STRING_CHAR_AS_MULTIBYTE_ADVANCE instead of
FETCH_STRING_CHAR_ADVANCE.
(Freplace_match): Convert unibyte chars to multibyte.
(GET_CHAR_BEFORE_2): Check target_multibyte, not multibyte. If
that is zero, convert an eight-bit char to multibyte.
(MAKE_CHAR_MULTIBYTE, CHAR_LEADING_CODE): New dummy new macros for
non-emacs case.
(PATFETCH): Convert an eight-bit char to multibyte.
(HANDLE_UNIBYTE_RANGE): New macro.
(regex_compile): Setup the compiled pattern for multibyte chars
even if the given regex string is unibyte. Use PATFETCH_RAW
instead of PATFETCH in many places. To handle `charset'
specification of unibyte, call HANDLE_UNIBYTE_RANGE. Use bitmap
only for ASCII chars.
(analyse_first) <exactn>: Simplified because the compiled pattern
is multibyte.
<charset_not>: Setup fastmap from bitmap only for ASCII chars.
<charset>: Use CHAR_LEADING_CODE to get leading codes.
<categoryspec>: If multibyte, setup fastmap only for ASCII chars
here.
(re_compile_fastmap) [emacs]: Call analyse_first with the arg
multibyte always 1.
(re_search_2) In emacs, set the locale variable multibyte to 1,
otherwise to 0. New local variable target_multibyte. Check it
to decide the multibyteness of STR1 and STR2. If
target_multibyte is zero, convert unibyte chars to multibyte
before translating and checking fastmap.
(TARGET_CHAR_AND_LENGTH): New macro.
(re_match_2_internal): In emacs, set the locale variable multibyte
to 1, otherwise to 0. New local variable target_multibyte. Check
it to decide the multibyteness of STR1 and STR2. Use
TARGET_CHAR_AND_LENGTH to fetch a character from D.
<charset, charset_not>: If multibyte is nonzero, check fastmap
only for ASCII chars. Call bcmp_translate with
target_multibyte, not with multibyte.
<begline>: Declare the local variable C as `unsigned'.
(bcmp_translate): Change the last arg name to target_multibyte.
not 1, singals an error. Update the elements of
unibyte_to_multibyte_table.
(init_charset_once): Initialize unibyte_to_multibyte_table.
(syms_of_charset): Define the charset `iso-8859-1'.
(unibyte_char_to_multibyte): Move to character.h and defined as
macro.
(multibyte_char_to_unibyte): If C is an eight-bit character,
convert it to the corresponding byte value.
(LEADING_CODE_LATIN_1_MAX): New macros.
(unibyte_to_multibyte_table): Extern it.
(unibyte_char_to_multibyte): New macro.
(MAKE_CHAR_MULTIBYTE): Use unibyte_to_multibyte_table.
(CHAR_LEADING_CODE): New macro.
(FETCH_STRING_CHAR_AS_MULTIBYTE_ADVANCE): New macro.
the case converting a region.
(encode_coding_utf_8): Encode eight-bit chars as single byte.
(encode_coding_object): Fix coding->dst_pos and
coding->dst_pos_byte for the case converting a region.
