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aling mask to 8 bytes

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This commit is contained in:
Nikolay Kim 2018-03-09 10:25:47 -08:00
parent 717602472a
commit 02dd5375a9
1 changed files with 17 additions and 20 deletions
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37
src/ws/mask.rs
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@ -26,36 +26,33 @@ fn apply_mask_fast32(buf: &mut [u8], mask_u32: u32) {
let mut len = buf.len();
// Possible first unaligned block.
let head = min(len, (4 - (ptr as usize & 3)) & 3);
let head = min(len, (8 - (ptr as usize & 0x7)) & 0x3);
let mask_u32 = if head > 0 {
unsafe {
xor_mem(ptr, mask_u32, head);
ptr = ptr.offset(head as isize);
}
len -= head;
//let mask_u32 =
if cfg!(target_endian = "big") {
mask_u32.rotate_left(8 * head as u32)
} else {
mask_u32.rotate_right(8 * head as u32)
}//;
let n = if head > 4 { head - 4 } else { head };
/*
let head = min(len, (4 - (ptr as usize & 3)) & 3);
if head > 0 {
let mask_u32 = if n > 0 {
unsafe {
xor_mem(ptr, mask_u32, head);
xor_mem(ptr, mask_u32, n);
ptr = ptr.offset(head as isize);
}
len -= head;
len -= n;
if cfg!(target_endian = "big") {
mask_u32.rotate_left(8 * head as u32)
mask_u32.rotate_left(8 * n as u32)
} else {
mask_u32.rotate_right(8 * head as u32)
mask_u32.rotate_right(8 * n as u32)
}
} else {
mask_u32
}*/
};
if head > 4 {
unsafe {
*(ptr as *mut u32) ^= mask_u32;
ptr = ptr.offset(4);
len -= 4;
}
}
mask_u32
} else {
mask_u32
};