mathlib.js
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mathlib.js
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	import { join } from 'ant:path';
	import { dlopen, suffix, FFIType } from 'ant:ffi';

	// compile the C library first:
	// clang -shared -fPIC -o mathlib.(so/dylib/dll) mathlib.c

	const mathlib = dlopen(join(import.meta.dirname, `mathlib.${suffix}`));

	mathlib.define('add', {
	args: [FFIType.int, FFIType.int],
	returns: FFIType.int
	});
	mathlib.define('multiply', {
	args: [FFIType.int, FFIType.int],
	returns: FFIType.int
	});
	mathlib.define('greet', {
	args: [FFIType.string],
	returns: FFIType.void
	});
	mathlib.define('divide', {
	args: [FFIType.double, FFIType.double],
	returns: FFIType.double
	});

	const result1 = mathlib.call('add', 5, 3);
	console.log(`add(5, 3) = ${result1}`);

	const result2 = mathlib.call('multiply', 4, 7);
	console.log(`multiply(4, 7) = ${result2}`);

	console.log('Calling greet function:');
	mathlib.call('greet', 'World');

	const result3 = mathlib.call('divide', 10.0, 2.0);
	console.log(`divide(10.0, 2.0) = ${result3}`);

	const result4 = mathlib.call('divide', 10.0, 0.0);
	console.log(`divide(10.0, 0.0) = ${result4}`);

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