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nothing found, set coding->composing to COMPOSITION_NO.
(decode_coding_string): Likewise.

inconsistent eol.
(code_convert_region): Always set saved_coding_symbol.
(decode_coding_string): Likewise.  Update coding->symbol when we
encounter a inconsistent eol by the same way as
code_convert_region.

(Fset_terminal_coding_system_internal): Set the member
suppress_error to 1.
(Fset_safe_terminal_coding_system_internal): Likewise.

(detect_eol_type_in_2_octet_form): Declare arg big_endian_p.

unused variable `i'.
(detect_coding_mask): Remove unused variable `idx'.
(detect_coding): Remove unused variable `i'.
(ccl_coding_driver): Remove unused variable `result'.
(run_pre_post_conversion_on_str): Remove unused variable `prev'.
(decode_coding_string): Remove unused variables `to' and
`gcpro1'.
(encode_coding_string): Remove unused variables `gcpro1' and
`saved_coding_symbol'.
(Ffind_coding_systems_region_internal): Remove function-local
variable args[], leave only the block-local one.
(code_convert_region1): Remove unused variable `len'.

coding->spec.ccl.eight_bit_carryover.
(ccl_coding_driver): Pay attention to carried over 8-bit bytes.

(DECODE_EMACS_MULE_COMPOSITION_CHAR): New macro.
(DECODE_EMACS_MULE_COMPOSITION_RULE): New macro.
(decode_composition_emacs_mule): New function.
(decode_coding_emacs_mule): Decode composition sequence by calling
decode_composition_emacs_mule.
(ENCODE_COMPOSITION_EMACS_MULE): New macro.
(encode_coding_emacs_mule): Changed from macro to function.  If
a text contains compostions, encode them correctly.
(setup_coding_system): Set coding->commong_flags for emacs-mule so
that decoding and encoding are required.

argument.
(code_convert_region): Don't override coding->src_multibyte and
coding->dst_multibyte.

coding_system at first.

coding->dst_multibyte before calling detect_coding and detect_eol.
Update them after some coding system is detected.

(detect_coding_emacs_mule, detect_coding_iso2022,)
(detect_coding_sjis, detect_coding_big5, detect_coding_utf_8)
(detect_coding_utf_16, detect_coding_ccl): Make them static.  New
argument MULTIBYTEP.  Callers changed.
(detect_coding_mask, detect_coding_system): New argument
MULTIBYTEP.  Callers changed.

include no-conversion.

CODING_EOL_LF, which used an uninitialized value of c.

CODING_MODE_LAST_BLOCK).

or CRLF, decode EOLs.

coding->dst_multibyte before using CODING_REQUIRE_DECODING.
(encode_coding_string): Set coding->src_multibyte and
coding->dst_multibyte before using CODING_REQUIRE_ENCODING.

encoding, not decoding.   Check for the charset katakana-jisx0201,
not latin-jisx0201.
(ONE_MORE_CHAR): Call translate_char with CHARSET arg -1.

coding->produced_char correctly.

consumed_char, produced, produced_char of *coding correctly.  If
decode_coding doesn't consume any byte, don't try anymore.
(encode_coding_string): Likewise.

the end of the source block.

(conversion_buffer, conversion_buffer_size): Variables deleted.
(get_conversion_buffer): Function deleted.
(struct conversion_buffer): New structure.
(MAX_ALLOCA): New macro.
(allocate_conversion_buffer): New macro.
(extend_conversion_buffer, free_conversion_buffer): New functions.
(ccl_coding_driver): Set coding->result.
(decode_coding): Set coding->result to CODING_FINISH_NORMAL if
this is the last block of source.
(encode_coding): Likewise.  Handle the source block as the last
one only when the whole source text is consumed.
(decode_coding_string): Handle the case that the output buffer is
too small to decode the whole source text.  Use
allocate_conversion_buffer, extend_conversion_buffer and
free_conversion_buffer, not get_conversion_buffer.
(encode_coding_string): Likewise.
(init_coding): Function deleted.
(init_coding_once): Delete code to initialize
conversion_buffer_size.

(Ffind_coding_systems_region_internal): First argument to Fappend must be an
integer, not a lisp object.

cmp_data is not set properly (because of invalid code in the
source text).
(run_pre_post_conversion_on_str): Include text properties in the
resulting string.
(decode_coding_string): Set members of coding correctly.

shifting.

(Qsafe_chars, Vchar_coding_system_table, Qchar_coding_system): New
variables.
(coding_safe_chars): New function.
(CODING_SAFE_CHAR_P): New macro.
(CHARSET_OK): New arg C.  Call CODING_SAFE_CHAR_P instead of
checking safe_charsets member of the coding system.  Caller
changed.
(detect_coding_iso2022): New local variable safe_chars.
(DECODE_DESIGNATION): Call CODING_SAFE_CHAR_P instead of checking
safe_charsets member of the coding system.
(decode_coding_iso2022): New local variable safe_chars.
(ENCODE_ISO_CHARACTER_DIMENSION1): Don't check unsafe chars here.
(ENCODE_ISO_CHARACTER_DIMENSION2): Likewise.
(ENCODE_ISO_CHARACTER): Arguments changed.  Caller changed.
(ENCODE_UNSAFE_CHARACTER): New macro.
(encode_coding_iso2022): New local variable safe_chars.  Check
unsafe chars.
(setup_coding_system): Delete the code to initialize
coding->safe_charses
(intersection, find_safe_codings): New functions.
(Ffind_coding_systems_region_internal): New function.
(syms_of_coding): Defsubr it.  Initialize Qsafe_chars,
Qsafe_cding_system.  Make Vchar_coding_system_table a Lisp
variable and initialize it.

conversion region.

`inhibit-iso-escape-detection'.

designations.

(syms_of_coding): Make it a Lisp variable.
(detect_coding_iso2022): If inhibit_iso_escape_detection is
nonzero, ignore ISO2022's escape sequence.

zero, try to convert it if coding->type is coding_type_ccl.
(decode_coding_string, encode_coding_string): Likewise.

Fstring_as_unibyte.