CBL_SWAP_SCR_CHATTRS

Restriction:
  • This routine is supported for native COBOL only.
  • This routine is not supported when CHARSET"EBCDIC" is in effect.
Swaps a string of characters and their attributes with a string from the screen.

Syntax:

call "CBL_SWAP_SCR_CHATTRS"  using     screen-position
                                      character-buffer
                                      attribute-buffer
                                      string-length
                            returning status-code

Parameters

screen-position
Group predefined as cblt-screen-position containing:
01 cblt-screen-position   typedef.
  03 cblte-scrp-row       cblt-x1-compx. 	*> pic x comp-x.
  03 cblte-scrp-col       cblt-x1-compx. 	*> pic x comp-x.
character-buffer
Call prototype (see Key): pic x (n).
Picture: pic x (n).
attribute-buffer
Call prototype (see Key): pic x (n).
Picture: pic x (n).
string-length
Call prototype (see Key): cblt-x2-compx.
Picture: pic x (2) comp-x.
status-code
See Library Routines - Key.

On Entry:

screen-position The screen position at which to start writing. The top left corner is row 0, column 0. See Screen Routines
character-buffer The characters to write.
attribute-buffer The attributes to write. Use the following table to set one or more attributes:
B"10000000" Reserved
B"01000000" Reserved
B"00100000" Reserved
B"00010000" Reserved
B"00001000" BLANK
B"00000100" REVERSE-VIDEO
B"00000010" UNDERLINE
B"00000001" HIGHLIGHT
string-length The length of the string to write. If this would go off the end of the screen, the write finishes at the end of the screen.

On Exit:

character-buffer The characters read from the screen. This data item must be at least as long as specified by string-length; positions in it beyond that length are unchanged.
attribute-buffer The attributes read from the screen. This data item must be at least as long as specified by string-length; positions in it beyond that length are unchanged.
string-length If the end of the screen is reached the length swapped (in cells, that is, character-attribute pairs) is returned in here.