Modul Engine

Jan Burse, erstellt 08. Feb 2019
/**
* Some interpreter state can be queried and updated. The predicate
* current_prolog_flag/2 allows accessing an interpreter attribute. The
* predicate set_prolog_flag/2 allows updating an interpreter attribute.
* The predicates halt/[0,1] allow exiting the current process.
*
* The predicates begin_module/1 and end_module/0 can be used to open
* respectively close a local module. For a consulted file the predicate
* begin_module/1 will also do first a clear of the local module, and
* the predicate end_module/0 will do a style check of the local module.
*
* Warranty & Liability
* To the extent permitted by applicable law and unless explicitly
* otherwise agreed upon, XLOG Technologies GmbH makes no warranties
* regarding the provided information. XLOG Technologies GmbH assumes
* no liability that any problems might be solved with the information
* provided by XLOG Technologies GmbH.
*
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* All industrial property rights regarding the information - copyright
* and patent rights in particular - are the sole property of XLOG
* Technologies GmbH. If the company was not the originator of some
* excerpts, XLOG Technologies GmbH has at least obtained the right to
* reproduce, change and translate the information.
*
* Reproduction is restricted to the whole unaltered document. Reproduction
* of the information is only allowed for non-commercial uses. Selling,
* giving away or letting of the execution of the library is prohibited.
* The library can be distributed as part of your applications and libraries
* for execution provided this comment remains unchanged.
*
* Restrictions
* Only to be distributed with programs that add significant and primary
* functionality to the library. Not to be distributed with additional
* software intended to replace any components of the library.
*
* Trademarks
* Jekejeke is a registered trademark of XLOG Technologies GmbH.
*/
:- use_package(foreign(jekpro/reference/bootload)).
:- use_package(foreign(jekpro/tools/call)).
:- use_package(foreign(jekpro/tools/term)).
:- module(user, []).
:- use_module(library(stream/console)).
/**
* current_prolog_flag(F, V): [ISO 8.17.2]
* The predicate succeeds for the value V of the flag F.
*/
% current_prolog_flag(-Atom, -Term)
:- public current_prolog_flag/2.
current_prolog_flag(Flag, Value) :-
var(Flag), !,
sys_get_flag(Flag, Value).
current_prolog_flag(Flag, Value) :-
sys_get_flag(Flag, Value).
:- private sys_current_flag/1.
:- foreign(sys_current_flag/1, 'ForeignEngine',
sysCurrentFlag('Interpreter','CallOut')).
:- private sys_get_flag/2.
:- foreign(sys_get_flag/2, 'ForeignEngine',
sysGetFlag('Interpreter','String')).
/**
* set_prolog_flag(F, V): [ISO]
* The predicate sets the flag F to the value V.
*/
% set_prolog_flag(+Atom, +Term)
:- public set_prolog_flag/2.
:- foreign(set_prolog_flag/2, 'ForeignEngine',
sysSetFlag('Interpreter','String','Object')).
/**
* halt: [ISO 8.17.3]
* halt(N): [ISO 8.17.4]
* The predicate without arguments terminates the interpreter with
* exit value zero. The unary predicate terminates the interpreter
* with exit value N.
*/
% halt
:- public halt/0.
halt(0).
% halt(+Integer)
:- public halt/1.
:- foreign(halt/1, 'ForeignEngine', sysHalt('Integer')).
/********************************************************/
/* Prolog Data */
/********************************************************/
/**
* welcome:
* version:
* The predicate displays a version banner.
*/
% welcome
:- public welcome/0.
:- set_predicate_property(welcome/0, sys_notrace).
:- public version/0.
write(W), nl.
:- set_predicate_property(version/0, sys_notrace).
:- private sys_prolog_version/1.
:- foreign(sys_prolog_version/1, 'ForeignEngine',
sysPrologVersion('Interpreter')).
:- private sys_prolog_vendor/1.
:- foreign(sys_prolog_vendor/1, 'ForeignEngine',
sysPrologVendor('Interpreter')).
/********************************************************/
/* Locale Modules */
/********************************************************/
/**
* begin_module(N):
* The predicate begins a new typein module N.
*/
% begin_module(+Atom)
:- public begin_module/1.
absolute_file_name(verbatim(N), D),
sys_module_action(D, [action(begin_module),sys_link(sys_auto_load)]),
set_prolog_flag(sys_last_pred, null).
/**
* end_module:
* The predicate ends the current typein module.
*/
% end_module
:- public end_module/0.
sys_module_action(D, [action(end_module),sys_link(sys_auto_load)]),
set_prolog_flag(sys_last_pred, null).
:- private sys_module_action/2.
:- foreign(sys_module_action/2, 'ForeignEngine',
sysModuleAction('Interpreter','TermAtomic','Object')).
:- private sys_peek_stack/1.
:- foreign(sys_peek_stack/1, 'ForeignEngine',
sysPeekStack('Interpreter')).

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