Parent topic: C API functions
C-Extensions / C API functions

rsetnull()

Sets a variable to NULL.

Syntax

mint rsetnull(mint vtype, char *pcvar);
  1. vtype is an integer corresponding to the data type of the variable.
  2. pcvar is a pointer to the variable.

Returns

Table 1. Return codes
Code Description
0 The operation was successful.
<0 The operation failed.

Usage

The vtype must be one of the data type constants defined in fglExt.h.

Parent topic: C API functions