Struct ckb_rocksdb::DBVector

pub struct DBVector { /* fields omitted */ }

Vector of bytes stored in the database.

This is a C allocated byte array and a length value. Normal usage would be to utilize the fact it implements Deref<[u8]> and use it as a slice.

Methods

impl DBVector

pub unsafe fn from_c(val: *mut u8, val_len: size_t) -> DBVector

Used internally to create a DBVector from a C memory block

Unsafe

Requires that the ponter be allocated by a malloc derivative (all C libraries), and val_len be the length of the C array to be safe (since sizeof(u8) = 1).

Example

let buf_len: libc::size_t = unsafe { mem::uninitialized() };
// Assume the function fills buf_len with the length of the returned array
let buf: *mut u8 = unsafe { ffi_function_returning_byte_array(&buf_len) };
DBVector::from_c(buf, buf_len)

pub fn to_utf8(&self) -> Option<&str>

Convenience function to attempt to reinterperet value as string.

implemented as str::from_utf8(&self[..])

Trait Implementations

impl AsRef<[u8]> for DBVector

fn as_ref(&self) -> &[u8]

Performs the conversion.

impl Deref for DBVector

type Target = [u8]

The resulting type after dereferencing.

fn deref(&self) -> &[u8]

Dereferences the value.

impl Drop for DBVector

fn drop(&mut self)

Executes the destructor for this type.