(PER_BUFFER_VAR_OFFSET): Renamed from BUFFER_LOCAL_VAR_OFFSET.
(PER_BUFFER_VAR_IDX): Renamed from BUFFER_LOCAL_VAR_IDX.
(PER_BUFFER_VALUE_P): Renamed from BUFFER_HAS_LOCAL_VALUE_P.
(SET_PER_BUFFER_VALUE_P): Renamed from SET_BUFFER_HAS_LOCAL_VALUE_P.
(PER_BUFFER_IDX): Renamed from BUFFER_LOCAL_IDX.
(PER_BUFFER_DEFAULT): Renamed from BUFFER_LOCAL_DEFAULT_VALUE.
(PER_BUFFER_VALUE): Renamed from BUFFER_LOCAL_VALUE.
(PER_BUFFER_SYMBOL): Renamed from BUFFER_LOCAL_SYMBOL.
(PER_BUFFER_TYPE): Renamed from BUFFER_LOCAL_TYPE.
(scroll_up_aggressively): New.
(scroll_down_aggressively): New.
(struct buffer): indicate_empty_lines renamed from
indicate_zv_lines.
(struct buffer): New member indicate_zv_lines.
(struct buffer): New members left_margin_width
and right_margin_width.
(struct buffer): Add member minibuffer_prompt_length
if PROMPT_IN_BUFFER.
(CHAR_TO_BYTE, BYTE_TO_CHAR): New macros.
(BEG_BYTE, BEGV_BYTE, PT_BYTE, GPT_BYTE)
(ZV_BYTE, Z_BYTE): New macros.
(BUF_BEG_BYTE, BUF_BEGV_BYTE, BUF_PT_BYTE, BUF_GPT_BYTE)
(BUF_ZV_BYTE, BUF_Z_BYTE): New macros.
(BUF_GAP_END_ADDR): New macro.
(BEGV_ADDR, PT_ADDR, GPT_ADDR, GAP_END_ADDR, ZV_ADDR, Z_ADDR):
Use the new ..._byte buffer data.
(BUFFER_CEILING_OF, BUFFER_FLOOR_OF): Likewise.
(BUF_GPT_ADDR, BUF_Z_ADDR): Likewise.
(SET_PT_BOTH, TEMP_SET_PT_BOTH): New macros.
(SET_PT, TEMP_SET_PT, BUF_SET_PT, BUF_TEMP_SET_PT):
Call functions with new arg order.
(SET_BUF_BEGV, SET_BUF_BEGV_BOTH): New macros.
(SET_BUF_PT): Macro deleted.
(SET_BUF_ZV): Set charpos and bytepos.
(SET_BUF_ZV_BOTH, SET_BUF_PT_BOTH): New macros.
(BYTE_POS_ADDR): Renamed from POS_ADDR.
(CHAR_POS_ADDR): New macro.
(FETCH_BYTE): Use BYTE_POS_ADDR.
(FETCH_MULTIBYTE_CHAR): Use ..._BYTE macros.
(BUF_CHAR_ADDRESS): Convert charpos to bytepos.
(BUF_BYTE_ADDRESS): New macro, like the old BUF_CHAR_ADDRESS.
(PTR_BYTE_POS): Renamed from PTR_CHAR_POS.
(BUF_PTR_BYTE_POS): New macro.
(BUF_FETCH_CHAR, BUF_FETCH_BYTE, BUF_FETCH_MULTIBYTE_CHAR): New macros.
(struct buffer_text): New fields gpt_byte, z_byte.
(struct buffer): New fields pt_byte, begv_byte, zv_byte.
(Z_ADDR, BUF_GPT_ADDR, BUF_Z_ADDR): New macros.
(struct buffer): New members `category_table',
`direction_reserved', and `enable-multibyte-characters'.
(POS_ADDR): New macro used at all places instead of &FETCH_CHAR.
(FETCH_BYTE): New macro used at any places to check the argument
against an ASCII character.
(FETCH_MULTIBYTE_CHAR): New macro used at any places to get a
character code of the argument when it is known to be a multibyte
character.
(_fetch_multibyte_char_p, _fetch_multibyte_char_len): New
variables.
(FETCH_CHAR): Use macros FETCH_MULTIBYTE_CHAR and FETCH_BYTE.
