pTAL Reference Manual (H06.08+)

Pointers

HP pTAL Reference Manual—523746-006

10-15

Initializing Simple Pointers

You can apply the @ operator to these global variables:

Simple pointers receive their initial values when you compile the source code. Local or

sublocal simple pointers receive their initial values at each activation of the

encompassing procedure or subprocedure.

Variable @

identifier

Direct array Yes

Standard indirect array Yes

Extended indirect array No

Direct structure Yes

Standard indirect structure Yes

Extended indirect structure No

Simple pointer No

Structure pointer No

Example 10-9. Declaring But Not Initializing a Simple Pointer

INT(32) .ptr;

Example 10-10. Declaring and Initializing a Simple Pointer

STRING .bytes[0:3]; ! Indirect array

STRING .s_ptr := @bytes[3]; ! Simple pointer initialized with

! address of bytes[3]

Example 10-11. Declaring and Initializing a STRING Simple Pointer

INT .a[0:39]; ! INT array

STRING .ptr := @a[0] '<<' 1; ! STRING simple pointer

! initialized with byte address

! of a[0]

Example 10-12. Declaring and Initializing Simple Pointers

INT a[0:1] := [%100000, %110000]; ! Array

INT .int_ptr1 := a[0]; ! Simple pointer

! initialized with %100000

INT .int_ptr2 := a[1]; ! Simple pointer

! initialized with %110000