moved to charset.h.
(copy_text): Don't convert codes in the range 0200..0237 to
multibyte characters. For codes in the range 0240..0377, use
unibyte_char_to_multibyte.
(count_size_as_multibyte): Likewise.
(adjust_before_replace): Comment fixed.
(insert_from_string_1, insert_from_buffer_1): Use it.
(copy_text): New function.
(insert_from_buffer_1): Call copy_text to convert between
single-byte and multibyte text.
(insert_from_string_1): Likewise.
(insert_1_both): New function.
(insert_from_string): New args POS_BYTE, LENGTH.
(insert_from_string_before_markers):
(insert_from_string_1): New arg POS_BYTE. Swap args NCHARS, NBYTES.
Don't fail to use POS_BYTE!
(insert_from_buffer_1): Get both inschars and insbytes from NEW.
(move_gap_both): New function.
(gap_left, gap_right): Take both charpos and bytepos args.
(adjust_markers_gap_motion): Renamed from adjust_markers and simplified.
(adjust_markers_for_delete): New function.
(adjust_markers_for_insert): Take args in chars and bytes.
Also new arg BEFORE_MARKERS. One call does all marker updating
needed for any insert.
(adjust_point): Take 2 args and update PT and PT_BYTE.
(make_gap): Handle bytes vs chars.
(insert, insert_and_inherit): Handle bytes vs chars.
Pass new BEFORE_MARKERS arg to insert_1.
(insert_before_markers, insert_before_markers_and_inherit): Likewise.
(insert_from_string, insert_from_string_before_markers): Likewise.
(insert_from_buffer): Likewise.
(insert_1): Handle bytes vs chars. New arg BEFORE_MARKERS.
(insert_from_string_1, insert_from_buffer_1): Likewise.
(replace_range): Likewise.
(del_range_2): New subroutine, taken from del_range_1.
(del_range_1): Use del_range_2.
(del_range_byte, del_range_both): New functions.
(gap_left, gap_right): Put an anchor `\0' at the end of GAP.
(adjust_markers_for_insert): If any markers are adjusted, check
and fix the order of overlays in overlays_before.
(make_gap): Allocate an extra byte and set to `\0' for anchoring.
(insert1, insert_from_buffer_1): Put an anchor `\0' at the head of
GAP.
save up changes in combine_after_change_list.
(Fcombine_after_change_execute)
(Fcombine_after_change_execute_1): New subroutines.
(syms_of_insdel): New function.
instead of direct access to the save_modiff field.
(insert_1, prepare_to_modify_buffer, insert_from_buffer_1): Use BUF_INTERVALS.
(adjust_markers): Use BUF_MARKERS.
(adjust_point): Use BUF_PT.
