1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261
#![cfg_attr(not(feature="std"), allow(unused_imports))] use super::combined_alloc::BrotliAlloc; use super::encode::{BrotliEncoderCreateInstance, BrotliEncoderDestroyInstance, BrotliEncoderParameter, BrotliEncoderSetParameter, BrotliEncoderOperation, BrotliEncoderStateStruct, BrotliEncoderCompressStream, BrotliEncoderIsFinished}; use super::backward_references::BrotliEncoderParams; use super::interface; use brotli_decompressor::CustomRead; #[cfg(feature="std")] pub use brotli_decompressor::{IntoIoReader, IoReaderWrapper, IoWriterWrapper}; pub use alloc::{AllocatedStackMemory, Allocator, SliceWrapper, SliceWrapperMut, StackAllocator}; #[cfg(feature="std")] pub use alloc_stdlib::StandardAlloc; #[cfg(feature="std")] use std::io; #[cfg(feature="std")] use std::io::{Read, Error, ErrorKind}; #[cfg(feature="std")] pub struct CompressorReaderCustomAlloc<R: Read, BufferType : SliceWrapperMut<u8>, Alloc: BrotliAlloc> ( CompressorReaderCustomIo<io::Error, IntoIoReader<R>, BufferType, Alloc>); #[cfg(feature="std")] impl<R: Read, BufferType : SliceWrapperMut<u8>, Alloc: BrotliAlloc> CompressorReaderCustomAlloc<R, BufferType, Alloc> { pub fn new(r: R, buffer : BufferType, alloc: Alloc, q: u32, lgwin: u32) -> Self { CompressorReaderCustomAlloc::<R, BufferType, Alloc>( CompressorReaderCustomIo::<Error, IntoIoReader<R>, BufferType, Alloc>::new( IntoIoReader::<R>(r), buffer, alloc, Error::new(ErrorKind::InvalidData, "Invalid Data"), q, lgwin)) } pub fn get_ref(&self) -> &R { &self.0.get_ref().0 } pub fn into_inner(self) -> R { self.0.into_inner().0 } } #[cfg(feature="std")] impl<R: Read, BufferType: SliceWrapperMut<u8>, Alloc: BrotliAlloc> Read for CompressorReaderCustomAlloc<R, BufferType, Alloc> { fn read(&mut self, buf: &mut [u8]) -> Result<usize, Error> { self.0.read(buf) } } #[cfg(feature="std")] pub struct CompressorReader<R: Read>(CompressorReaderCustomAlloc<R, <StandardAlloc as Allocator<u8>>::AllocatedMemory, StandardAlloc>); #[cfg(feature="std")] impl<R: Read> CompressorReader<R> { pub fn new(r: R, buffer_size: usize, q: u32, lgwin: u32) -> Self { let mut alloc = StandardAlloc::default(); let buffer = <StandardAlloc as Allocator<u8>>::alloc_cell(&mut alloc, if buffer_size == 0 { 4096} else {buffer_size}); CompressorReader::<R>(CompressorReaderCustomAlloc::new(r, buffer, alloc, q, lgwin)) } pub fn with_params(r: R, buffer_size: usize, params: &BrotliEncoderParams) -> Self { let mut reader = Self::new(r, buffer_size, params.quality as u32, params.lgwin as u32); (reader.0).0.state.0.params = params.clone(); reader } pub fn get_ref(&self) -> &R { self.0.get_ref() } pub fn into_inner(self) -> R { self.0.into_inner() } } #[cfg(feature="std")] impl<R: Read> Read for CompressorReader<R> { fn read(&mut self, buf: &mut [u8]) -> Result<usize, Error> { self.0.read(buf) } } pub struct CompressorReaderCustomIo<ErrType, R: CustomRead<ErrType>, BufferType: SliceWrapperMut<u8>, Alloc: BrotliAlloc> { input_buffer: BufferType, total_out: Option<usize>, input_offset: usize, input_len: usize, input: R, input_eof: bool, error_if_invalid_data: Option<ErrType>, state: StateWrapper<Alloc>, } struct StateWrapper<Alloc:BrotliAlloc>(BrotliEncoderStateStruct<Alloc>); impl<Alloc: BrotliAlloc> Drop for StateWrapper <Alloc> { fn drop(&mut self) { BrotliEncoderDestroyInstance(&mut self.0); } } impl<ErrType, R: CustomRead<ErrType>, BufferType : SliceWrapperMut<u8>, Alloc: BrotliAlloc> CompressorReaderCustomIo<ErrType, R, BufferType, Alloc> { pub fn new(r: R, buffer : BufferType, alloc : Alloc, invalid_data_error_type : ErrType, q: u32, lgwin: u32) -> Self { let mut ret = CompressorReaderCustomIo{ input_buffer : buffer, total_out : Some(0), input_offset : 0, input_len : 0, input_eof : false, input: r, state : StateWrapper(BrotliEncoderCreateInstance(alloc)), error_if_invalid_data : Some(invalid_data_error_type), }; BrotliEncoderSetParameter(&mut ret.state.0, BrotliEncoderParameter::BROTLI_PARAM_QUALITY, q as (u32)); BrotliEncoderSetParameter(&mut ret.state.0, BrotliEncoderParameter::BROTLI_PARAM_LGWIN, lgwin as (u32)); ret } pub fn copy_to_front(&mut self) { let avail_in = self.input_len - self.input_offset; if self.input_offset == self.input_buffer.slice_mut().len() { self.input_offset = 0; self.input_len = 0; } else if self.input_offset + 256 > self.input_buffer.slice_mut().len() && avail_in < self.input_offset { let (first, second) = self.input_buffer.slice_mut().split_at_mut(self.input_offset); first[0..avail_in].clone_from_slice(&second[0..avail_in]); self.input_len -= self.input_offset; self.input_offset = 0; } } pub fn into_inner(self) -> R{ match self { CompressorReaderCustomIo { input_buffer:_ib, total_out:_to, input_offset: _io, input_len: _len, input, input_eof:_ieof, error_if_invalid_data: _eiid, state: _state, } => { input } } } pub fn get_ref(&self) -> &R { &self.input } } impl<ErrType, R: CustomRead<ErrType>, BufferType : SliceWrapperMut<u8>, Alloc: BrotliAlloc> CustomRead<ErrType> for CompressorReaderCustomIo<ErrType, R, BufferType, Alloc> { fn read(&mut self, buf: &mut [u8]) -> Result<usize, ErrType > { let mut nop_callback = |_data:&mut interface::PredictionModeContextMap<interface::InputReferenceMut>, _cmds: &mut [interface::StaticCommand], _mb: interface::InputPair, _mfv: &mut Alloc|(); let mut output_offset : usize = 0; let mut avail_out = buf.len(); let mut avail_in = self.input_len - self.input_offset; while output_offset == 0 { if self.input_len < self.input_buffer.slice_mut().len() && !self.input_eof { match self.input.read(&mut self.input_buffer.slice_mut()[self.input_len..]) { Err(e) => return Err(e), Ok(size) => if size == 0 { self.input_eof = true; }else { self.input_len += size; avail_in = self.input_len - self.input_offset; }, } } let op : BrotliEncoderOperation; if avail_in == 0 { op = BrotliEncoderOperation::BROTLI_OPERATION_FINISH; } else { op = BrotliEncoderOperation::BROTLI_OPERATION_PROCESS; } let ret = BrotliEncoderCompressStream( &mut self.state.0, op, &mut avail_in, &self.input_buffer.slice_mut()[..], &mut self.input_offset, &mut avail_out, buf, &mut output_offset, &mut self.total_out, &mut nop_callback); if avail_in == 0 { self.copy_to_front(); } if ret <= 0 { return Err(self.error_if_invalid_data.take().unwrap()); } let fin = BrotliEncoderIsFinished(&mut self.state.0); if fin != 0 { break; } } Ok(output_offset) } }