The include file SWI-Prolog.h should be included with
each C source file that is to be loaded via the foreign interface. The
installation process installs this file in the directory
include in the SWI-Prolog home directory (?-
current_prolog_flag(home, Home).). This C header file defines
various data types, macros and functions that can be used to communicate
with SWI-Prolog. Functions and macros can be divided into the following
categories:
- Analysing Prolog terms
- Constructing new terms
- Unifying terms
- Returning control information to Prolog
- Registering foreign predicates with Prolog
- Calling Prolog from C
- Recorded database interactions
- Global actions on Prolog (halt, break, abort, etc.)
