CBL_READ_SCR_CHATTRS

Restriction:

This routine is supported for native COBOL only.
This routine is not supported when CHARSET"EBCDIC" is in effect.

Reads a string of characters and their attributes from the screen.

Syntax:

call "CBL_READ_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 to start reading at. The top left corner is row 0, column 0. See Screen Routines.
`string-length`	The length of the string to read.

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.

The attributes are as follows:

B"10000000"	BACKGROUND HIGHLIGHT
B"01000000"	BACKGROUND-COLOR (RED)
B"00100000"	BACKGROUND-COLOR (GREEN)
B"00010000"	BACKGROUND-COLOR (BLUE)
B"00001000"	FOREGROUND HIGHLIGHT
B"00000100"	FOREGROUND-COLOR (RED)
B"00000010"	FOREGROUND-COLOR (GREEN)
B"00000001"	FOREGROUND-COLOR (BLUE)

string-length

If the end of the screen is reached, the length read (in cells, that is, character-attribute pairs) is returned in here.