Some of the parameter access functions (like
nni_get_parm,
nni_put_parm) use
a buffer that contains a parameter value in the correct representation. The
length of the buffer depends on the Natural data type. The data format of the
buffer is defined according to the following table:
| Natural Data Type | Buffer Format |
|---|---|
| A | char[ ] |
| B | byte[ ] |
| C | short |
| F4 | float |
| F8 | double |
| I1 | signed char |
| I2 | short |
| I4 | int |
| L | NNI_L_TRUE or NNI_L_FALSE, see
natni.h |
| HANDLE OF OBJECT | byte[8] |
| P, N, D, T | The buffer content should be created from a string representation
with the function nni_from_string. It can
be transformed to a string representation with the function
nni_to_string.
|
| U | An array of UTF-16 characters. On Windows and on those UNIX and OpenVMS platforms where a wchar corresponds to a UTF-16 character, this is a wchar[]. |
Some of the parameter access functions (like
nni_get_parm, and
nni_put_parm)
require a Natural data type to be specified. In these cases the following
constants should be used. The constants are defined in the header file
natni.h. This file is contained in the directory
NATDIR:[F$Trnlnm("NATVERS").samples.sysexnni].
| Natural Data Type | Constant |
|---|---|
| A | NNI_TYPE_ALPHA |
| B | NNI_TYPE_BIN |
| C | NNI_TYPE_CV |
| D | NNI_TYPE_DATE |
| F | NNI_TYPE_FLOAT |
| I | NNI_TYPE_INT |
| L | NNI_TYPE_LOG |
| N | NNI_TYPE_NUM |
| HANDLE OF OBJECT | NNI_TYPE_OBJECT |
| P | NNI_TYPE_PACK |
| T | NNI_TYPE_TIME |
| U | NNI_TYPE_UNICODE |
