Remove DunHuffman16 pattern Box allocation
parent
ec8dd2ddee
commit
6e83cda4ad
84
src/lib.rs
84
src/lib.rs
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@ -140,8 +140,8 @@ impl CodeLengthReader {
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fn to_lit_and_dist(&self) -> Result<(DynHuffman16, DynHuffman16), &'static str> {
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fn to_lit_and_dist(&self) -> Result<(DynHuffman16, DynHuffman16), &'static str> {
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let num_lit = self.num_lit as usize;
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let num_lit = self.num_lit as usize;
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let lit = DynHuffman16::new(&self.result[..num_lit])?;
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let lit = DynHuffman16::new(&self.result[..num_lit], DynHuffmanType::LIT)?;
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let dist = DynHuffman16::new(&self.result[num_lit..])?;
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let dist = DynHuffman16::new(&self.result[num_lit..], DynHuffmanType::DIST)?;
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Ok((lit, dist))
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Ok((lit, dist))
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}
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}
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}
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}
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@ -152,15 +152,29 @@ struct Trie8bit {
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children: [Option<Box<[u16; 16]>>; 16],
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children: [Option<Box<[u16; 16]>>; 16],
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}
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}
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static mut DYNLITBUFFER: [u16; 256] = [0; 256];
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static mut DYNDISTBUFFER: [u16; 256] = [0; 256];
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enum DynHuffmanType {
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LIT,
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DIST,
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}
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#[derive(Debug)]
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#[derive(Debug)]
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struct DynHuffman16 {
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struct DynHuffman16 {
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patterns: Box<[u16; 256]>,
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patterns: &'static mut [u16; 256],
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rest: Vec<Trie8bit>,
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rest: Vec<Trie8bit>,
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}
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}
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impl DynHuffman16 {
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impl DynHuffman16 {
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fn new(clens: &[u8]) -> Result<DynHuffman16, &'static str> {
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fn new(clens: &[u8], ty: DynHuffmanType) -> Result<DynHuffman16, &'static str> {
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let mut patterns = Box::new([0xffffu16; 256]);
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let patterns = unsafe {
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match ty {
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DynHuffmanType::LIT => &mut DYNLITBUFFER,
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DynHuffmanType::DIST => &mut DYNDISTBUFFER,
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}
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};
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patterns.fill(0xffffu16);
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let mut rest = Vec::new();
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let mut rest = Vec::new();
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with_codes!(clens, 15 => u16, |i: u16, code: u16, bits: u8| -> _ {
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with_codes!(clens, 15 => u16, |i: u16, code: u16, bits: u8| -> _ {
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let entry = i | (u16::from(bits) << 12);
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let entry = i | (u16::from(bits) << 12);
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@ -524,27 +538,47 @@ impl InflateStream {
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}
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}
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1 => {
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1 => {
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// Unwrap is safe because the data is valid.
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// Unwrap is safe because the data is valid.
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let lit = DynHuffman16::new(&[
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let lit = DynHuffman16::new(
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, // 0-15
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&[
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, // 16-31
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, // 32-47
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8, // 0-15
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, // 48-63
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, // 64-79
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8, // 16-31
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, // 80-95
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, // 96-101
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8, // 32-47
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, // 112-127
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, // 128-143
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8, // 48-63
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, // 144-159
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, // 160-175
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8, // 64-79
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, // 176-191
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, // 192-207
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8, // 80-95
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, // 208-223
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, // 224-239
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8, // 96-101
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, // 240-255
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
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7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, // 256-271
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8, // 112-127
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
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8, // 128-143
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
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9, // 144-159
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
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9, // 160-175
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
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9, // 176-191
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
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9, // 192-207
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
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9, // 208-223
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
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9, // 224-239
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
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9, // 240-255
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7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
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7, // 256-271
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7, 7, 7, 7, 7, 7, 7, 7, // 272-279
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7, 7, 7, 7, 7, 7, 7, 7, // 272-279
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8, 8, 8, 8, 8, 8, 8, 8, // 280-287
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8, 8, 8, 8, 8, 8, 8, 8, // 280-287
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])
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],
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DynHuffmanType::LIT,
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)
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.unwrap();
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.unwrap();
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#[rustfmt::skip]
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#[rustfmt::skip]
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@ -553,7 +587,7 @@ impl InflateStream {
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5, 5, 5, 5, 5, 5, 5, 5,
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5, 5, 5, 5, 5, 5, 5, 5,
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5, 5, 5, 5, 5, 5, 5, 5,
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5, 5, 5, 5, 5, 5, 5, 5,
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5, 5, 5, 5, 5, 5, 5, 5
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5, 5, 5, 5, 5, 5, 5, 5
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]).unwrap();
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], DynHuffmanType::DIST).unwrap();
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ok!(BlockDyn(lit, dist, 0))
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ok!(BlockDyn(lit, dist, 0))
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}
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}
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2 => ok!(BlockDynHlit),
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2 => ok!(BlockDynHlit),
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