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ffi.d.ts
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ffi.d.ts
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declare module 'ant:ffi' {
interface FFITypeConstants {
void: 'void';
int8: 'int8';
int16: 'int16';
int: 'int';
int64: 'int64';
uint8: 'uint8';
uint16: 'uint16';
uint64: 'uint64';
float: 'float';
double: 'double';
pointer: 'pointer';
string: 'string';
spread: '...';
}
type FFIType = FFITypeConstants[keyof FFITypeConstants];
type FFIValueType = Exclude<FFIType, '...'>;
interface FunctionSignature {
returns: FFIValueType;
args: FFIType[];
}
interface FFIPointer {
address(): number;
isNull(): boolean;
offset(bytes: number): FFIPointer;
read(type?: FFIValueType): unknown;
write(type: FFIValueType, value: unknown): FFIPointer;
free(): FFIPointer;
}
interface FFICallback {
address(): number;
close(): FFICallback;
}
interface FFIFunction<Args extends unknown[] = unknown[], Return = unknown> {
(...args: Args): Return;
address(): number;
}
interface FFILibrary {
define(name: string, signature: FunctionSignature | [FFIValueType, FFIType[]]): FFIFunction;
call(name: string, ...args: unknown[]): unknown;
close(): FFILibrary;
}
const suffix: 'dylib' | 'so' | 'dll';
const FFIType: FFITypeConstants;
function alloc(size: number): FFIPointer;
function pointer(value?: string | FFIPointer | FFICallback | ArrayBuffer | ArrayBufferView | null): FFIPointer;
function callback(signature: FunctionSignature | [FFIValueType, FFIType[]], fn: (...args: unknown[]) => unknown): FFICallback;
function callback(fn: (...args: unknown[]) => unknown, signature: FunctionSignature | [FFIValueType, FFIType[]]): FFICallback;
function dlopen<T extends object = {}>(libraryPath: string): FFILibrary & T;
}

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