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Download(c) 2005-2025 XLOG Technologies AG
/**
* Modern Albufeira Prolog Interpreter
*
* Warranty & Liability
* To the extent permitted by applicable law and unless explicitly
* otherwise agreed upon, XLOG Technologies AG makes no warranties
* regarding the provided information. XLOG Technologies AG assumes
* no liability that any problems might be solved with the information
* provided by XLOG Technologies AG.
*
* Rights & License
* All industrial property rights regarding the information - copyright
* and patent rights in particular - are the sole property of XLOG
* Technologies AG. If the company was not the originator of some
* excerpts, XLOG Technologies AG 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 AG.
*/
import {
exec_build, exec_unify, add, make_check, deref,
check_atom, check_nonvar, copy_term,
make_error, Compound
} from "../../nova/core.mjs";
let crypto;
if (typeof window === 'undefined') {
crypto = await import("node:crypto");
} else {
crypto = undefined
}
/**
* digest_open(D): internal only
* The built-in succeeds in D with a new digest.
*/
function test_digest_open(args) {
let digest = crypto.createHash('sha256');
return exec_unify(args[0], digest);
}
/**
* digest_update(D, B): internal only
* The built-in succeeds. As a side effect the digest D is updated by B.
*/
function test_digest_update(args) {
let alpha = deref(exec_build(args[0]));
check_digest(alpha);
let beta = deref(exec_build(args[1]));
check_atom(beta);
let buffer = Buffer.from(beta, "latin1");
alpha.update(buffer);
return true;
}
/**
* Assure that the object is a digest.
*
* @param beta The object.
*/
function check_digest(beta) {
if (!(beta instanceof crypto.Hash)) {
check_nonvar(beta);
beta = copy_term(beta);
throw make_error(new Compound("type_error", ["digest", beta]));
}
}
/**
* digest_close(D, B): internal only
* The built-in succeeds in B with the result of the digest D.
*/
function test_digest_close(args) {
let alpha = deref(exec_build(args[0]));
check_digest(alpha);
let buffer = alpha.digest();
return exec_unify(args[1], buffer.toString("latin1"));
}
/*********************************************************************/
/* Asm Lib Init */
/*********************************************************************/
export function main() {
add("digest_open", 1, make_check(test_digest_open));
add("digest_update", 2, make_check(test_digest_update));
add("digest_close", 2, make_check(test_digest_close));
}