WCSLIB 8.4

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Data Fields
dpkey Struct Reference

Store for `DPja` and `DQia` keyvalues. More...

`#include <dis.h>`

## Data Fields
char | field [72]
int | j
int | type
union { |
int i |
double f |
} | value |

## Detailed Description

Store for `DPja` and `DQia` keyvalues.

The dpkey struct is used to pass the parsed contents of `DPja` or `DQia` keyrecords to disset() via the disprm struct. A disprm struct must hold only `DPja` or `DQia` keyvalues, not both.

All members of this struct are to be set by the user.

## Field Documentation

## ◆ field

char dpkey::field[72]

(Given) The full field name of the record, including the keyword name. Note that the colon delimiter separating the field name and the value in record-valued keyvalues is not part of the field name. For example, in the following:

DP3A = 'AXIS.1: 2'

the full record field name is "DP3A`.AXIS.`1", and the record's value is 2.

## ◆ j

int dpkey::j

(Given) Axis number (1-relative), i.e. the j in `DPja` or i in `DQia`.

## ◆ type

int dpkey::type

(Given) The data type of the record's value

- 0: Integer (stored as an int),
- 1: Floating point (stored as a double).

## ◆ i

int dpkey::i

## ◆ f

double dpkey::f

## ◆ [union]

union { ... } dpkey::value

(Given) A union comprised of

- dpkey::i,
- dpkey::f,

the record's value.