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IDL

Scalar Variables

Scalar Variables

A scalar IDL_VARIABLE is distinguished by not having the IDL_V_ARR bit set in its flags field. A scalar variable must have one of the basic data types (IDL structures are never scalar) shown in the table below. The data for a scalar variable is stored in the IDL_VARIABLE itself, using the IDL_ALLTYPES union. The following table gives the relationship between the data type and the field used.

Scalar Data Type

Field That Stores Data

IDL_TYP_UNDEF

None

IDL_TYP_BYTE

value.c

IDL_TYP_INT

value.i

IDL_TYPE_UINT

value.ui

IDL_TYP_LONG

value.l

IDL_TYP_ULONG

value.ul

IDL_TYP_LONG64

value.l64

IDL_TYP_ULONG64

value.ul64

IDL_TYP_FLOAT

value.f

IDL_TYP_DOUBLE

value.d

IDL_TYP_COMPLEX

value.cmp

IDL_TYP_STRING

value.dcmp

IDL_TYP_PTR

value.str

IDL_TYP_OBJ

value.hvid



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