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#![cfg_attr(not(feature="std"), allow(unused_imports))] use core; use super::encode::{BrotliEncoderCreateInstance, BrotliEncoderDestroyInstance, BrotliEncoderParameter, BrotliEncoderSetParameter, BrotliEncoderOperation, BrotliEncoderStateStruct, BrotliEncoderCompressStream, BrotliEncoderIsFinished}; use super::backward_references::BrotliEncoderParams; use brotli_decompressor::CustomWrite; use super::interface; #[cfg(feature="std")] pub use brotli_decompressor::{IntoIoWriter, IoWriterWrapper}; use super::combined_alloc::BrotliAlloc; 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::{Write, Error, ErrorKind}; #[cfg(feature="std")] pub struct CompressorWriterCustomAlloc<W: Write, BufferType : SliceWrapperMut<u8>, Alloc: BrotliAlloc> ( CompressorWriterCustomIo<io::Error, IntoIoWriter<W>, BufferType, Alloc>); #[cfg(feature="std")] impl<W: Write, BufferType : SliceWrapperMut<u8>, Alloc: BrotliAlloc> CompressorWriterCustomAlloc<W, BufferType, Alloc> { pub fn new(w: W, buffer : BufferType, alloc: Alloc, q: u32, lgwin: u32) -> Self { CompressorWriterCustomAlloc::<W, BufferType, Alloc>( CompressorWriterCustomIo::<Error, IntoIoWriter<W>, BufferType, Alloc>::new( IntoIoWriter::<W>(w), buffer, alloc, Error::new(ErrorKind::InvalidData, "Invalid Data"), q, lgwin)) } pub fn get_ref(&self) -> &W { &self.0.get_ref().0 } pub fn into_inner(self) -> W { self.0.into_inner().0 } } #[cfg(feature="std")] impl<W: Write, BufferType: SliceWrapperMut<u8>, Alloc: BrotliAlloc> Write for CompressorWriterCustomAlloc<W, BufferType, Alloc> { fn write(&mut self, buf: &[u8]) -> Result<usize, Error> { self.0.write(buf) } fn flush(&mut self) -> Result<(), Error> { self.0.flush() } } #[cfg(feature="std")] pub struct CompressorWriter<W: Write>(CompressorWriterCustomAlloc<W, <StandardAlloc as Allocator<u8>>::AllocatedMemory, StandardAlloc>); #[cfg(feature="std")] impl<W: Write> CompressorWriter<W> { pub fn new(w: W, 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}); CompressorWriter::<W>(CompressorWriterCustomAlloc::new(w, buffer, alloc, q, lgwin)) } pub fn with_params(w: W, buffer_size: usize, params: &BrotliEncoderParams) -> Self { let mut writer = Self::new(w, buffer_size, params.quality as u32, params.lgwin as u32); (writer.0).0.state.params = params.clone(); writer } pub fn get_ref(&self) -> &W { self.0.get_ref() } pub fn into_inner(self) -> W { self.0.into_inner() } } #[cfg(feature="std")] impl<W: Write> Write for CompressorWriter<W> { fn write(&mut self, buf: &[u8]) -> Result<usize, Error> { self.0.write(buf) } fn flush(&mut self) -> Result<(), Error> { self.0.flush() } } pub struct CompressorWriterCustomIo<ErrType, W: CustomWrite<ErrType>, BufferType: SliceWrapperMut<u8>, Alloc: BrotliAlloc> { output_buffer: BufferType, total_out: Option<usize>, output: Option<W>, error_if_invalid_data: Option<ErrType>, state: BrotliEncoderStateStruct<Alloc>, } pub fn write_all<ErrType, W: CustomWrite<ErrType>>(writer: &mut W, mut buf : &[u8]) -> Result<(), ErrType> { while buf.len() != 0 { match writer.write(buf) { Ok(bytes_written) => buf = &buf[bytes_written..], Err(e) => return Err(e), } } Ok(()) } impl<ErrType, W: CustomWrite<ErrType>, BufferType : SliceWrapperMut<u8>, Alloc: BrotliAlloc> CompressorWriterCustomIo<ErrType, W, BufferType, Alloc> { pub fn new(w: W, buffer : BufferType, alloc : Alloc, invalid_data_error_type : ErrType, q: u32, lgwin: u32) -> Self { let mut ret = CompressorWriterCustomIo{ output_buffer : buffer, total_out : Some(0), output: Some(w), state : BrotliEncoderCreateInstance(alloc), error_if_invalid_data : Some(invalid_data_error_type), }; BrotliEncoderSetParameter(&mut ret.state, BrotliEncoderParameter::BROTLI_PARAM_QUALITY, q as (u32)); BrotliEncoderSetParameter(&mut ret.state, BrotliEncoderParameter::BROTLI_PARAM_LGWIN, lgwin as (u32)); ret } fn flush_or_close(&mut self, op:BrotliEncoderOperation) -> Result<(), ErrType>{ let mut nop_callback = |_data:&mut interface::PredictionModeContextMap<interface::InputReferenceMut>, _cmds: &mut [interface::StaticCommand], _mb: interface::InputPair, _mfv: &mut Alloc|(); loop { let mut avail_in : usize = 0; let mut input_offset : usize = 0; let mut avail_out : usize = self.output_buffer.slice_mut().len(); let mut output_offset : usize = 0; let ret = BrotliEncoderCompressStream( &mut self.state, op, &mut avail_in, &[], &mut input_offset, &mut avail_out, self.output_buffer.slice_mut(), &mut output_offset, &mut self.total_out, &mut nop_callback); if output_offset > 0 { match write_all(self.output.as_mut().unwrap(), &self.output_buffer.slice_mut()[..output_offset]) { Ok(_) => {}, Err(e) => return Err(e), } } if ret <= 0 { return Err(self.error_if_invalid_data.take().unwrap()); } if let BrotliEncoderOperation::BROTLI_OPERATION_FLUSH = op { return Ok(()); } if BrotliEncoderIsFinished(&mut self.state) != 0 { return Ok(()); } } } pub fn get_ref(&self) -> &W { self.output.as_ref().unwrap() } pub fn into_inner(mut self) -> W { match self.flush_or_close(BrotliEncoderOperation::BROTLI_OPERATION_FINISH) { Ok(_) => {}, Err(_) => {}, } core::mem::replace(&mut self.output, None).unwrap() } } impl<ErrType, W: CustomWrite<ErrType>, BufferType : SliceWrapperMut<u8>, Alloc: BrotliAlloc> Drop for CompressorWriterCustomIo<ErrType, W, BufferType, Alloc> { fn drop(&mut self) { if self.output.is_some() { match self.flush_or_close(BrotliEncoderOperation::BROTLI_OPERATION_FINISH) { Ok(_) => {}, Err(_) => {}, } } BrotliEncoderDestroyInstance(&mut self.state); } } impl<ErrType, W: CustomWrite<ErrType>, BufferType : SliceWrapperMut<u8>, Alloc: BrotliAlloc> CustomWrite<ErrType> for CompressorWriterCustomIo<ErrType, W, BufferType, Alloc> { fn write(&mut self, buf: & [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 avail_in = buf.len(); let mut input_offset : usize = 0; while avail_in != 0 { let mut output_offset = 0; let mut avail_out = self.output_buffer.slice_mut().len(); let ret = BrotliEncoderCompressStream( &mut self.state, BrotliEncoderOperation::BROTLI_OPERATION_PROCESS, &mut avail_in, &buf[..], &mut input_offset, &mut avail_out, self.output_buffer.slice_mut(), &mut output_offset, &mut self.total_out, &mut nop_callback); if output_offset > 0 { match write_all(self.output.as_mut().unwrap(), &self.output_buffer.slice_mut()[..output_offset]) { Ok(_) => {}, Err(e) => return Err(e), } } if ret <= 0 { return Err(self.error_if_invalid_data.take().unwrap()); } } Ok(buf.len()) } fn flush(&mut self) -> Result<(), ErrType > { match self.flush_or_close(BrotliEncoderOperation::BROTLI_OPERATION_FLUSH) { Ok(_) => {}, Err(e) => return Err(e), } self.output.as_mut().unwrap().flush() } }