scroll/src/deno/ffi.ts

// Deno-specific ffi code

// Determine library extension based on
// your OS.
// import { termiosStruct } from "../common/termios.ts";

let libSuffix = '';
switch (Deno.build.os) {
	case 'windows':
		libSuffix = 'dll';
		break;
	case 'darwin':
		libSuffix = 'dylib';
		break;
	default:
		libSuffix = 'so.6';
		break;
}

const cSharedLib = `libc.${libSuffix}`;
const cStdLib = Deno.dlopen(
	cSharedLib,
	{
		tcgetattr: {
			parameters: ['i32', 'pointer'],
			result: 'i32',
		},
		tcsetattr: {
			parameters: ['i32', 'i32', 'pointer'],
			result: 'i32',
		},
		cfmakeraw: {
			parameters: ['pointer'],
			result: 'void',
		},
	} as const,
);

export const { tcgetattr, tcsetattr, cfmakeraw } = cStdLib.symbols;

export const getPointer = Deno.UnsafePointer.of;