TAL Programmer's Guide

Using Structure Pointers

Using Pointers

096254 Tandem Computers Incorporated 9–21

The indexed item determines the size of the index offset, as listed in Table 9-4:

Table 9-4. Indexing Structure Pointers

Indexed Item Data Type Size of Index Offset

Structure or structure pointer Not applicable Total bytes in one structure occurrence

Substructure Not applicable Total bytes in one substructure occurrence

Simple variable or array STRING Byte

Simple variable or array INT Word

Simple variable or array INT(32) or REAL Doubleword

Simple variable or array REAL(64) or FIXED Quadrupleword

Indexing Standard Structure Pointers

The index for standard structure pointers must be a signed INT arithmetic expression

in the range –32,768 through 32,767. Examples of signed INT arithmetic expressions

are:

index

index + 2

index – 1

9 * index