Struct FfiStr 

#[repr(C)]
pub struct FfiStr {
    pub ptr: *const u8,
    pub len: usize,
}

A borrowed UTF-8 string. Not NUL-terminated.

Lifetime rules: an FfiStr returned by a host callback stays valid until the next re-entering callback (see the rooting contract); an FfiStr passed to a host callback only needs to be valid for that call.

Fields

ptr: *const u8

Pointer to the first byte. Must be non-null in both directions - an empty string is a non-null pointer with len == 0 (e.g. C’s ""); a null pointer is not a valid string value.

len: usize

Length in bytes.

Implementations

impl FfiStr

pub const fn null() -> Self

A null-pointer FfiStr for initializing the out-parameter of a bool-probe callback (string_get overwrites it on success). Not a valid string value - see FfiStr::ptr.

Trait Implementations

impl Clone for FfiStr

fn clone(&self) -> FfiStr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FfiStr

impl Debug for FfiStr

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

Formats the value using the given formatter.