<?php

namespace {
    /**
     * @since 7.4.0
     */
    final class FFI
    {
        public static function cdef(string $code = "", ?string $lib = null): FFI
        {
        }

        public static function load(string $filename): ?FFI
        {
        }

        public static function scope(string $name): FFI
        {
        }

        /**
         * Note: Official docs say this could return `null`, but it throws exceptions instead.
         * @param \FFI\CType|string $type
         */
        public static function new($type, bool $owned = true, bool $persistent = false): \FFI\CData
        {
        }

        public static function free(\FFI\CData $ptr): void
        {
        }

        /**
         * @param \FFI\CType $type
         * @param \FFI\CData|int|float|bool|null $ptr
         */
        public static function cast($type, &$ptr): ?\FFI\CData
        {
        }

        public static function type(string $type): ?\FFI\CType
        {
        }

        public static function typeof(\FFI\CData $ptr): \FFI\CType
        {
        }

        /**
         * @param array<int<0,max>> $dimensions
         */
        public static function arrayType(\FFI\CType $type, array $dimensions): \FFI\CType
        {
        }

        public static function addr(\FFI\CData $ptr): \FFI\CData
        {
        }

        /**
         * @param \FFI\CData|\FFI\CType $ptr
         * @return int<0,max>
         */
        public static function sizeof($ptr): int
        {
        }

        /**
         * @param \FFI\CData|\FFI\CType $ptr
         * @return positive-int
         */
        public static function alignof($ptr): int
        {
        }

        /**
         * @param \FFI\CData|string $from
         * @param int<0,max> $size
         */
        public static function memcpy(\FFI\CData $to, $from, int $size): void
        {
        }

        /**
         * @param string|\FFI\CData $ptr1
         * @param string|\FFI\CData $ptr2
         * @param int<0,max> $size
         */
        public static function memcmp(&$ptr1, &$ptr2, int $size): int
        {
        }

        /**
         * @param int<0,max> $size
         */
        public static function memset(\FFI\CData $ptr, int $value, int $size): void
        {
        }

        /**
         * @param int<0,max>|null $size
         */
        public static function string(\FFI\CData $ptr, ?int $size = null): string
        {
        }

        public static function isNull(\FFI\CData $ptr): bool
        {
        }

        public function __call(...$values)
        {
        }

        /**
         * @param mixed $value
         * @return mixed $value
         */
        public function __set(string $key, $value)
        {
        }

        /**
         * @return string|int|float|\FFI\CData|null
         */
        public function __get(string $key)
        {
        }
    }

}

namespace FFI {

    /**
     * @since 7.4.0
     */
    final class CData implements \Countable, \ArrayAccess, \Countable, \Traversable
    {
        /**
         * @return bool
         */
        public function offsetExists($offset)
        {
        }

        /**
         * @return mixed|null
         */
        public function offsetGet($offset)
        {
        }

        /**
        * @param mixed|null $value
        * @return void
        */
        public function offsetSet($offset, $value)
        {
        }

        /**
        * @return void
        */
        public function offsetUnset($offset)
        {
        }
    }

    /**
     * @since 7.4.0
     */
    final class CType
    {
        /**
         * @since 8.1
         */
        public const TYPE_VOID = 0;

        /**
         * @since 8.1
         */
        public const TYPE_FLOAT = 1;

        /**
         * @since 8.1
         */
        public const TYPE_DOUBLE = 2;

        /**
         * @since 8.1
         */
        public const TYPE_LONGDOUBLE = 3;

        /**
         * @since 8.1
         */
        public const TYPE_UINT8 = 4;

        /**
         * @since 8.1
         */
        public const TYPE_SINT8 = 5;

        /**
         * @since 8.1
         */
        public const TYPE_UINT16 = 6;

        /**
         * @since 8.1
         */
        public const TYPE_SINT16 = 7;

        /**
         * @since 8.1
         */
        public const TYPE_UINT32 = 8;

        /**
         * @since 8.1
         */
        public const TYPE_SINT32 = 9;

        /**
         * @since 8.1
         */
        public const TYPE_UINT64 = 10;

        /**
         * @since 8.1
         */
        public const TYPE_SINT64 = 11;

        /**
         * @since 8.1
         */
        public const TYPE_ENUM = 12;

        /**
         * @since 8.1
         */
        public const TYPE_BOOL = 13;

        /**
         * @since 8.1
         */
        public const TYPE_CHAR = 14;

        /**
         * @since 8.1
         */
        public const TYPE_POINTER = 15;

        /**
         * @since 8.1
         */
        public const TYPE_FUNC = 16;

        /**
         * @since 8.1
         */
        public const TYPE_ARRAY = 17;

        /**
         * @since 8.1
         */
        public const TYPE_STRUCT = 18;

        /**
         * @since 8.1
         */
        public const ATTR_CONST = 1;

        /**
         * @since 8.1
         */
        public const ATTR_INCOMPLETE_TAG = 2;

        /**
         * @since 8.1
         */
        public const ATTR_VARIADIC = 4;

        /**
         * @since 8.1
         */
        public const ATTR_INCOMPLETE_ARRAY = 8;

        /**
         * @since 8.1
         */
        public const ATTR_VLA = 16;

        /**
         * @since 8.1
         */
        public const ATTR_UNION = 32;

        /**
         * @since 8.1
         */
        public const ATTR_PACKED = 64;

        /**
         * @since 8.1
         */
        public const ATTR_MS_STRUCT = 128;

        /**
         * @since 8.1
         */
        public const ATTR_GCC_STRUCT = 256;

        /**
         * @since 8.1
         */
        public const ABI_DEFAULT = 0;

        /**
         * @since 8.1
         */
        public const ABI_CDECL = 1;

        /**
         * @since 8.1
         */
        public const ABI_FASTCALL = 2;

        /**
         * @since 8.1
         */
        public const ABI_THISCALL = 3;

        /**
         * @since 8.1
         */
        public const ABI_STDCALL = 4;

        /**
         * @since 8.1
         */
        public const ABI_PASCAL = 5;

        /**
         * @since 8.1
         */
        public const ABI_REGISTER = 6;

        /**
         * @since 8.1
         */
        public const ABI_MS = 7;

        /**
         * @since 8.1
         */
        public const ABI_SYSV = 8;

        /**
         * @since 8.1
         */
        public const ABI_VECTORCALL = 9;

        public function getName(): string
        {
        }

        /**
         * @since 8.1.0
         * @return self::TYPE_*
         */
        public function getKind(): int
        {
        }

        /**
         * @since 8.1.0
         * @return int<0,max>
         */
        public function getSize(): int
        {
        }

        /**
         * @since 8.1.0
         * @return int<0,max>
         */
        public function getAlignment(): int
        {
        }

        /**
         * @since 8.1.0
         */
        public function getAttributes(): int
        {
        }

        /**
         * @since 8.1.0
         * @return self::TYPE_UINT32|self::TYPE_UINT64
         */
        public function getEnumKind(): int
        {
        }

        /**
         * @since 8.1.0
         */
        public function getArrayElementType(): CType
        {
        }

        /**
         * @since 8.1.0
         * @return int<0,max>
         */
        public function getArrayLength(): int
        {
        }

        /**
         * @since 8.1.0
         */
        public function getPointerType(): CType
        {
        }

        /**
         * @since 8.1.0
         * @return string[]
         */
        public function getStructFieldNames(): array
        {
        }

        /**
         * @since 8.1.0
         * @return int<0,max>
         */
        public function getStructFieldOffset(string $name): int
        {
        }

        /**
         * @since 8.1.0
         */
        public function getStructFieldType(string $name): CType
        {
        }

        /**
         * @since 8.1.0
         * @return self::ABI_*
         */
        public function getFuncABI(): int
        {
        }

        /**
         * @since 8.1.0
         */
        public function getFuncReturnType(): CType
        {
        }

        /**
         * @since 8.1.0
         * @return int<0,max>
         */
        public function getFuncParameterCount(): int
        {
        }

        /**
         * @param int<0,max> $index
         * @since 8.1.0
         */
        public function getFuncParameterType(int $index): CType
        {
        }
    }

    /**
     * @since 7.4.0
     */
    class Exception extends \Error
    {
    }

    /**
     * @since 7.4.0
     */
    final class ParserException extends Exception
    {
    }
}