form_field_userptr3x

Associate application data with a form field

Usage

#include <form.h>

int set_field_userptr(FIELD *field, void *userptr); void *field_userptr(const FIELD *field);

Overview

Every form field has a field that can be used to hold application-specific data (that is, the form-driver code leaves it alone). These functions get and set that field.

Return value

The function field_userptr returns a pointer (which may be NULL). It does not set errno.

The function set_field_userptr returns E_OK (success).

Portability

These routines emulate the System V forms library. They were not supported on Version 7 or BSD versions.

The user pointer is a void pointer. We chose not to leave it as a char pointer for SVr4 compatibility.