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store pointer separately

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This commit is contained in:
Robin Appelman 2019-03-16 16:40:32 +01:00
commit 52f830bf7f
1 changed files with 6 additions and 1 deletions
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7
src/buffer.rs
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@ -42,6 +42,7 @@ pub struct BitBuffer<E>
bit_len: usize,
byte_len: usize,
endianness: PhantomData<E>,
ptr: *const u8,
}
impl<E> BitBuffer<E>
@ -64,6 +65,7 @@ impl<E> BitBuffer<E>
pub fn new(bytes: Vec<u8>, _endianness: E) -> Self {
let byte_len = bytes.len();
BitBuffer {
ptr: bytes.as_ptr(),
bytes: Rc::new(bytes),
byte_len,
bit_len: byte_len * 8,
@ -92,7 +94,7 @@ impl<E> BitBuffer<E>
let usize_bit_size = size_of::<usize>() * 8;
let raw_container: &usize = unsafe {
// this is safe here because we already have checks that we don't read past the slice
let ptr = self.bytes.as_ptr().add(byte_index);
let ptr = self.ptr.add(byte_index);
transmute(ptr)
};
let container = if E::is_le() {
@ -534,6 +536,7 @@ impl<E> BitBuffer<E>
}
Ok(BitBuffer {
ptr: self.ptr,
bytes: Rc::clone(&self.bytes),
byte_len: bit_len / 8,
bit_len,
@ -546,6 +549,7 @@ impl<E: Endianness> From<Vec<u8>> for BitBuffer<E> {
fn from(bytes: Vec<u8>) -> Self {
let byte_len = bytes.len();
BitBuffer {
ptr: bytes.as_ptr(),
bytes: Rc::new(bytes),
byte_len,
bit_len: byte_len * 8,
@ -557,6 +561,7 @@ impl<E: Endianness> From<Vec<u8>> for BitBuffer<E> {
impl<E: Endianness> Clone for BitBuffer<E> {
fn clone(&self) -> Self {
BitBuffer {
ptr: self.ptr,
bytes: Rc::clone(&self.bytes),
byte_len: self.byte_len,
bit_len: self.bit_len,