| Function |
Specifies one of the functions provided by the lftvi interface.
The following functions are provided: - cursor_up
- Moves the cursor up the number of rows specified in the escape
sequence.
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- cursor_down
- Moves the cursor down the number of rows specified in the escape
sequence.
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- cursor_left
- Moves the cursor left the number of columns specified in the
escape sequence.
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- cursor_right
- Moves the cursor right the number of columns specified in the
escape sequence.
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- cursor_absolute
- Moves the cursor to the row and column coordinates specified
in the escape sequence.
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- delete_char
- Deletes data from the cursor X position. The number of characters
to be deleted is specified in the escape sequence.
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- delete_line
- Deletes the number of lines specified in the escape sequence
from the cursor line. Any data following the deleted lines is scrolled
up.
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- erase_l
- Erases a line. The escape sequence specifies whether to delete
to the end of the line, from the start of the line, or all of the
line. This routine calls the clear_rectangle function to perform
the erasure.
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- erase_display
- Clears all or part of the screen as specified in the escape
sequence.
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- screen_updat
- Processes a graphics string. Chops the output string into lines
if necessary and calls the vtt* routines in the display driver.
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- copy_part
- Calls the VDD that services the terminal to copy part of a line
to the presentation space.
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- clear_rect
- Calls the VDD that services the terminal to clear a rectangle.
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- sound_beep
- Calls the sound driver to emit a beep.
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- set_attributes
- Sets the graphics rendition.
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- update_ds_modes
- Sets or resets the data-stream modes.
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- set_clear_tab
- Sets or clears the tabs as specified in the escape sequence.
This function operates on either a line or screen model.
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- update_ht_stop
- Sets or clears horizontal tabs. This function can set or clear
the horizontal tabs for one line or the whole screen.
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- clear_all_ht
- Clears all horizontal tabs on a line.
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- cursor_back_tab
- Moves the cursor to the previous tab stop.
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- cursor_ht
- Places the cursor at the next horizontal tab.
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- find_prior_tab
- Finds the previous tab by examining the terminal's tab array
and setting the cursor's X and Y coordinates to that point. This function
takes wrap and autonewline into consideration.
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- find_next_tab
- Finds the next tab by examining the terminal's tab array and
setting the cursor's X and Y coordinates to that point. This function
takes wrap and autonewline into consideration.
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- scroll_down
- Moves the entire presentation space down the number of lines
specified in the escape sequence.
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- scroll_up
- Moves the entire presentation space up the number of lines specified
in the escape sequence.
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- erase_char
- Erases the number of characters specified in the escape sequence
from the line. If an erase occurs at the end of a line, the line length
is altered.
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- insert_line
- Scrolls the cursored line and all lines following it down the
number of lines specified in the escape sequence.
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- insert_char
- Inserts the number of empty spaces specified in the escape sequence
before the character indicated by the cursor. Characters beginning
at the cursor are shifted right. Characters shifted past the right
margin are lost.
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- upd_cursor
- Calls the vttmove function to update the cursor position.
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- ascii_index
- Moves the cursor down one line. If the cursor was already on
the last line, all lines are scrolled up one line.
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- vttscr
- Specifies the scroll entry point.
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- vtttext
- Specifies the display graphics characters entry point.
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- vttclr
- Specifies the clear rectangle entry point.
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- vttcpl
- Specifies the copy line entry point.
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- vttmove
- Specifies the move cursor entry point.
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- vttcfl
- Specifies the copy full line entry point.
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