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(CATEGORY_MASK_RAW_TEXT): New macro.
(detect_coding_utf_8, detect_coding_utf_16) (detect_coding_emacs_mule, detect_coding_iso_2022) (detect_coding_sjis, detect_coding_big5) (detect_coding_ccl, detect_coding_charset): Change argument MASK to DETECT_INFO. Update DETECT_INFO and return 1 if the byte sequence is valid in this coding system. Callers changed. (MAX_ANNOTATION_LENGTH): New macro. (ADD_ANNOTATION_DATA): New macro. (ADD_COMPOSITION_DATA): Argument changed. Callers changed. Call ADD_ANNOTATION_DATA. The format of annotation data changed. (ADD_CHARSET_DATA): New macro. (emacs_mule_char): New argument ID. Callers changed. (decode_coding_emacs_mule, decode_coding_iso_2022) (decode_coding_sjis, decode_coding_big5, decode_coding_charset): Produce charset annotation data in coding->charbuf. (encode_coding_emacs_mule, encode_coding_iso_2022): Pay attention to charset annotation data in coding->charbuf. (setup_coding_system): Add CODING_ANNOTATE_CHARSET_MASK coding->common_flags if the coding system is iso-2022 based and uses designation. (produce_composition): Adjusted for the new annotation data format. (produce_charset): New function. (produce_annotation): Handle charset annotation. (handle_composition_annotation, handle_charset_annotation): New functions. (consume_chars): Handle charset annotation. Utilize the above two functions. (encode_coding_object): If SRC_OBJECT and DST_OBJECT are the same buffer, get the deleted text as a string and set coding->src_object to that string. (detect_coding, detect_coding_system): Use the new struct coding_detection_info.
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