CBL_SWAP_SCR_CHATTRS

Swaps a string of characters and their attributes with a string from the screen.

Restriction: This routine is supported for native COBOL only.

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.
`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.