openharmony/third_party_rust_encoding_rs
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Be a bit smarted about skipping complexity with short but aligned UTF-16.

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This commit is contained in:
Henri Sivonen
2017-10-05 12:30:32 +03:00
parent 0c4eaa5f7e
commit 86e2f3445f
1 changed files with 10 additions and 6 deletions
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src/mem.rs
+10 -6
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@@ -139,12 +139,16 @@ cfg_if!{
'outer: loop {
let until_alignment = ((SIMD_ALIGNMENT - ((unsafe { src.offset(offset as isize) } as usize) & SIMD_ALIGNMENT_MASK)) &
SIMD_ALIGNMENT_MASK) / unit_size;
let offset_plus_until_alignment = offset + until_alignment;
let offset_plus_until_alignment_plus_one = offset_plus_until_alignment + 1;
if offset_plus_until_alignment_plus_one + STRIDE_SIZE / unit_size > len {
break;
}
if until_alignment != 0 {
if until_alignment == 0 {
if offset + STRIDE_SIZE / unit_size > len {
break;
}
} else {
let offset_plus_until_alignment = offset + until_alignment;
let offset_plus_until_alignment_plus_one = offset_plus_until_alignment + 1;
if offset_plus_until_alignment_plus_one + STRIDE_SIZE / unit_size > len {
break;
}
let (up_to, last_valid_low) = utf16_valid_up_to_alu(&buffer[offset..offset_plus_until_alignment_plus_one]);
if up_to < until_alignment {
return offset + up_to;