VARIABLE

The Parse Service Routine builds a five-word PDE to describe a VARIABLE operand. The PDE has the following format:

Offset decimal	Meaning
0	A pointer to the data-name
4	Length1
5	Reserved
6	Flags
7	Reserved
8	A pointer to the PDE for the first qualifier
12	A pointer to the program-id name
16	Length2
17	Number of Qualifiers
18	Number of Subscripts
19	Reserved

Pointer to the data-name:

contains a pointer to the data-name. If a program-id qualifier precedes the data-name, this pointer points to the first character after the period of the program-id qualifier.

Length1:

contains the length of the data-name.

Flags:

Byte 1:

Setting	Meaning
`0... ....`	The operand is missing.
`1... ....`	The operand is present.
`.1.. ....`	Constant.
`..1. ....`	Variable.
`...1 ....`	Statement number.
`.... xxxx`	Reserved.

Pointer to the PDE for the first qualifier:

contains a pointer to the PDE describing the first qualifier of the data-name, if any. This field contains X'FF000000' if no qualifiers are entered.

Note: The format of the PDE for a data-name qualifier follows this description.

Pointer to the program-id name:

contains a pointer to the program-id name, if entered. This field contains zero if the optional program-id name is not present.

Length2:

contains the length of the program-id name, if entered. Contains zero if the optional program-id name is not present.

Number of Qualifiers:

contains the number of qualifiers entered for this data-name. (For example, if data-name A of B is entered, this field would contain 1.)

Number of Subscripts:

contains the number of subscripts entered for this data-name. (For example, if data-name A(1,2) is entered, this field would contain 2.)

The format of a data-name qualifier is:

Offset decimal	Meaning
0	A pointer to the data-name qualifier
4	Length
5	Reserved
6	Reserved
7	Reserved
8	A pointer to the PDE for the next qualifier

Pointer to the data-name qualifier:: contains a pointer to the data-name qualifier.
Length:: contains the length of the data-name qualifier.
Pointer to the PDE for the next qualifier:: contains a pointer to the PDE describing the next qualifier, if any. This field contains X'FF000000' for the last qualifier.