Struct RbBytes 

#[repr(C)]
pub struct RbBytes {
    pub len: u32,
    pub data: *const u8,
}

FFI-safe borrowed byte slice reference

This is a view into binary data that the caller owns. The data must remain valid for the duration of the FFI call.

Memory Layout

+--------+--------+
|  len   |  data  |
| (u32)  | (*u8)  |
+--------+--------+

Invariants

• If data is non-null, it must point to len valid bytes
• If len == 0 and data == null, represents “not present” (None)
• Maximum size is 4GB (u32::MAX bytes)

Fields

len: u32

Length in bytes

data: *const u8

Pointer to binary data

Implementations

impl RbBytes

pub const fn none() -> Self

Create an empty/absent byte slice (represents None)

pub const fn from_static(bytes: &'static [u8]) -> Self

Create from a static byte slice

pub fn is_present(&self) -> bool

Check if this byte slice is present (not None)

pub fn is_empty(&self) -> bool

Check if this byte slice is empty

pub unsafe fn as_slice(&self) -> Option<&[u8]>

Convert to a Rust byte slice

Safety

• data must be valid for reads of len bytes
• The memory must not be modified during the lifetime of the returned slice

pub unsafe fn to_vec(&self) -> Option<Vec<u8>>

Convert to a Vec (copies data)

Safety

Same requirements as as_slice

Trait Implementations

impl Clone for RbBytes

fn clone(&self) -> RbBytes

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RbBytes

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for RbBytes

fn default() -> Self

Returns the “default value” for a type.

impl Copy for RbBytes

impl Send for RbBytes

impl Sync for RbBytes