Struct UserStringView 

#[repr(C)]
pub struct UserStringView {
    pub data: UserInPtr<u8>,
    pub length: usize,
}

A wrapper around zx_string_view_t passed from userspace into kernel syscalls.

This struct has exact memory layout parity with zx_string_view_t (const char*, size_t), ensuring ABI compatibility when passed by value across FFI boundaries.

Fields

data: UserInPtr<u8>

Pointer to userspace UTF-8 bytes.

length: usize

Length of the string in bytes.

Implementations

impl UserStringView

pub fn is_empty(&self) -> bool

Returns true if the string view is empty.

pub fn len(&self) -> usize

Returns the length of the string view in bytes.

pub fn copy_slice_from_user<'a>( &self, dst: &'a mut [MaybeUninit<u8>], ) -> Result<&'a mut [u8], Status>

Copies the string bytes from userspace into a destination slice.

Returns Status::INVALID_ARGS if the slice is smaller than length.

Trait Implementations

impl Clone for UserStringView

fn clone(&self) -> UserStringView

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UserStringView

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

Formats the value using the given formatter.

impl Default for UserStringView

fn default() -> UserStringView

Returns the “default value” for a type.

impl Copy for UserStringView