412 lines
17 KiB
Rust
412 lines
17 KiB
Rust
use crate::{FileChunkRead, NeedMinBuffer};
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use bitshuffle::bitshuffle_decompress;
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use bytes::{Buf, BytesMut};
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use err::Error;
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use futures_core::Stream;
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use futures_util::StreamExt;
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use netpod::log::*;
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use netpod::timeunits::SEC;
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use netpod::{ByteSize, ChannelConfig, EventDataReadStats, NanoRange, ScalarType, Shape};
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use std::path::PathBuf;
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use std::pin::Pin;
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use std::task::{Context, Poll};
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pub struct EventChunker {
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inp: NeedMinBuffer,
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state: DataFileState,
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need_min: u32,
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channel_config: ChannelConfig,
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errored: bool,
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completed: bool,
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range: NanoRange,
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stats_conf: EventChunkerConf,
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seen_beyond_range: bool,
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sent_beyond_range: bool,
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data_emit_complete: bool,
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final_stats_sent: bool,
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parsed_bytes: u64,
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path: PathBuf,
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}
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enum DataFileState {
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FileHeader,
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Event,
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}
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struct ParseResult {
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events: EventFull,
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parsed_bytes: u64,
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}
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#[derive(Clone, Debug)]
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pub struct EventChunkerConf {
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disk_stats_every: ByteSize,
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}
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impl EventChunkerConf {
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pub fn new(disk_stats_every: ByteSize) -> Self {
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Self { disk_stats_every }
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}
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}
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impl EventChunker {
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pub fn from_start(
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inp: Pin<Box<dyn Stream<Item = Result<FileChunkRead, Error>> + Send>>,
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channel_config: ChannelConfig,
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range: NanoRange,
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stats_conf: EventChunkerConf,
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path: PathBuf,
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) -> Self {
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let mut inp = NeedMinBuffer::new(inp);
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inp.set_need_min(6);
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Self {
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inp,
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state: DataFileState::FileHeader,
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need_min: 6,
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channel_config,
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errored: false,
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completed: false,
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range,
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stats_conf,
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seen_beyond_range: false,
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sent_beyond_range: false,
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data_emit_complete: false,
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final_stats_sent: false,
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parsed_bytes: 0,
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path,
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}
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}
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pub fn from_event_boundary(
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inp: Pin<Box<dyn Stream<Item = Result<FileChunkRead, Error>> + Send>>,
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channel_config: ChannelConfig,
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range: NanoRange,
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stats_conf: EventChunkerConf,
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path: PathBuf,
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) -> Self {
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let mut ret = Self::from_start(inp, channel_config, range, stats_conf, path);
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ret.state = DataFileState::Event;
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ret.need_min = 4;
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ret.inp.set_need_min(4);
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ret
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}
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fn parse_buf(&mut self, buf: &mut BytesMut) -> Result<ParseResult, Error> {
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span!(Level::INFO, "EventChunker::parse_buf").in_scope(|| self.parse_buf_inner(buf))
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}
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fn parse_buf_inner(&mut self, buf: &mut BytesMut) -> Result<ParseResult, Error> {
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let mut ret = EventFull::empty();
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let mut parsed_bytes = 0;
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use byteorder::{ReadBytesExt, BE};
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loop {
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if (buf.len() as u32) < self.need_min {
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break;
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}
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match self.state {
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DataFileState::FileHeader => {
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if buf.len() < 6 {
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Err(Error::with_msg("need min 6 for FileHeader"))?;
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}
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let mut sl = std::io::Cursor::new(buf.as_ref());
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let fver = sl.read_i16::<BE>().unwrap();
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if fver != 0 {
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Err(Error::with_msg("unexpected data file version"))?;
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}
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let len = sl.read_i32::<BE>().unwrap();
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if len <= 0 || len >= 128 {
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Err(Error::with_msg("large channel header len"))?;
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}
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let totlen = len as usize + 2;
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if buf.len() < totlen {
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self.need_min = totlen as u32;
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break;
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} else {
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sl.advance(len as usize - 8);
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let len2 = sl.read_i32::<BE>().unwrap();
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if len != len2 {
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Err(Error::with_msg("channel header len mismatch"))?;
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}
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String::from_utf8(buf.as_ref()[6..(len as usize + 6 - 8)].to_vec())?;
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self.state = DataFileState::Event;
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self.need_min = 4;
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buf.advance(totlen);
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parsed_bytes += totlen as u64;
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}
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}
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DataFileState::Event => {
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let mut sl = std::io::Cursor::new(buf.as_ref());
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let len = sl.read_i32::<BE>().unwrap();
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if len < 20 || len > 1024 * 1024 * 10 {
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Err(Error::with_msg("unexpected large event chunk"))?;
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}
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let len = len as u32;
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if (buf.len() as u32) < len {
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self.need_min = len as u32;
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break;
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} else {
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let mut sl = std::io::Cursor::new(buf.as_ref());
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let len1b = sl.read_i32::<BE>().unwrap();
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assert!(len == len1b as u32);
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let _ttl = sl.read_i64::<BE>().unwrap();
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let ts = sl.read_i64::<BE>().unwrap() as u64;
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let pulse = sl.read_i64::<BE>().unwrap() as u64;
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if ts >= self.range.end {
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self.seen_beyond_range = true;
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self.data_emit_complete = true;
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break;
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}
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if ts < self.range.beg {
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Err(Error::with_msg(format!(
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"seen before range: event ts: {}.{} range beg: {}.{} range end: {}.{} pulse {} config {:?} path {:?}",
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ts / SEC,
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ts % SEC,
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self.range.beg / SEC,
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self.range.beg % SEC,
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self.range.end / SEC,
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self.range.end % SEC,
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pulse,
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self.channel_config.shape,
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self.path
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)))?;
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}
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let _ioc_ts = sl.read_i64::<BE>().unwrap();
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let status = sl.read_i8().unwrap();
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let severity = sl.read_i8().unwrap();
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let optional = sl.read_i32::<BE>().unwrap();
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if status != 0 {
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Err(Error::with_msg(format!("status != 0: {}", status)))?;
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}
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if severity != 0 {
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Err(Error::with_msg(format!("severity != 0: {}", severity)))?;
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}
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if optional != -1 {
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Err(Error::with_msg(format!("optional != -1: {}", optional)))?;
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}
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let type_flags = sl.read_u8().unwrap();
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let type_index = sl.read_u8().unwrap();
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if type_index > 13 {
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Err(Error::with_msg(format!("type_index: {}", type_index)))?;
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}
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let scalar_type = ScalarType::from_dtype_index(type_index)?;
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use super::dtflags::*;
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let is_compressed = type_flags & COMPRESSION != 0;
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let is_array = type_flags & ARRAY != 0;
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let is_big_endian = type_flags & BIG_ENDIAN != 0;
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let is_shaped = type_flags & SHAPE != 0;
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if let Shape::Wave(_) = self.channel_config.shape {
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if !is_array {
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Err(Error::with_msg(format!("dim1 but not array {:?}", self.channel_config)))?;
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}
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}
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let compression_method = if is_compressed { sl.read_u8().unwrap() } else { 0 };
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let shape_dim = if is_shaped { sl.read_u8().unwrap() } else { 0 };
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assert!(compression_method <= 0);
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assert!(!is_shaped || (shape_dim >= 1 && shape_dim <= 2));
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let mut shape_lens = [0, 0, 0, 0];
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for i1 in 0..shape_dim {
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shape_lens[i1 as usize] = sl.read_u32::<BE>().unwrap();
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}
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if is_compressed {
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//debug!("event ts {} is_compressed {}", ts, is_compressed);
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let value_bytes = sl.read_u64::<BE>().unwrap();
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let block_size = sl.read_u32::<BE>().unwrap();
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let p1 = sl.position() as u32;
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let k1 = len as u32 - p1 - 4;
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//debug!("event len {} ts {} is_compressed {} shape_dim {} len-dim-0 {} value_bytes {} block_size {}", len, ts, is_compressed, shape_dim, shape_lens[0], value_bytes, block_size);
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assert!(value_bytes < 1024 * 256);
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assert!(block_size < 1024 * 32);
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let type_size = scalar_type.bytes() as u32;
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let ele_count = value_bytes / type_size as u64;
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let ele_size = type_size;
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match self.channel_config.shape {
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Shape::Wave(dim1count) => {
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if dim1count != ele_count as u32 {
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Err(Error::with_msg(format!(
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"ChannelConfig expects {:?} but event has {:?}",
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self.channel_config.shape, ele_count,
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)))?;
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}
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}
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Shape::Scalar => {
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if is_array {
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Err(Error::with_msg(format!(
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"ChannelConfig expects Scalar but we find event is_array"
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)))?;
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}
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}
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}
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let decomp_bytes = (type_size * ele_count as u32) as usize;
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let mut decomp = BytesMut::with_capacity(decomp_bytes);
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unsafe {
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decomp.set_len(decomp_bytes);
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}
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match bitshuffle_decompress(
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&buf.as_ref()[p1 as usize..],
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&mut decomp,
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ele_count as usize,
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ele_size as usize,
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0,
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) {
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Ok(c1) => {
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assert!(c1 as u32 == k1);
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if ts < self.range.beg {
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} else if ts >= self.range.end {
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Err(Error::with_msg(format!("event after range {}", ts / SEC)))?;
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} else {
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ret.add_event(
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ts,
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pulse,
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Some(decomp),
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ScalarType::from_dtype_index(type_index)?,
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is_big_endian,
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);
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}
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}
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Err(e) => {
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Err(Error::with_msg(format!("decompression failed {:?}", e)))?;
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}
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};
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} else {
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let p1 = sl.position();
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if len < p1 as u32 + 4 {
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let msg = format!("uncomp len: {} p1: {}", len, p1);
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Err(Error::with_msg(msg))?;
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}
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let vlen = len - p1 as u32 - 4;
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let decomp = BytesMut::from(&buf[p1 as usize..(p1 as u32 + vlen) as usize]);
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ret.add_event(
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ts,
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pulse,
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Some(decomp),
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ScalarType::from_dtype_index(type_index)?,
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is_big_endian,
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);
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}
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buf.advance(len as usize);
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parsed_bytes += len as u64;
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self.need_min = 4;
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}
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}
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}
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}
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Ok(ParseResult {
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events: ret,
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parsed_bytes,
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})
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}
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}
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pub struct EventFull {
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pub tss: Vec<u64>,
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pub pulses: Vec<u64>,
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pub decomps: Vec<Option<BytesMut>>,
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pub scalar_types: Vec<ScalarType>,
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pub be: Vec<bool>,
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}
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impl EventFull {
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pub fn empty() -> Self {
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Self {
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tss: vec![],
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pulses: vec![],
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decomps: vec![],
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scalar_types: vec![],
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be: vec![],
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}
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}
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fn add_event(&mut self, ts: u64, pulse: u64, decomp: Option<BytesMut>, scalar_type: ScalarType, be: bool) {
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self.tss.push(ts);
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self.pulses.push(pulse);
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self.decomps.push(decomp);
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self.scalar_types.push(scalar_type);
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self.be.push(be);
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}
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}
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pub enum EventChunkerItem {
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Events(EventFull),
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RangeComplete,
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EventDataReadStats(EventDataReadStats),
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}
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impl Stream for EventChunker {
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type Item = Result<EventChunkerItem, Error>;
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fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<Self::Item>> {
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use Poll::*;
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'outer: loop {
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break if self.completed {
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panic!("EventChunker poll_next on completed");
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} else if self.errored {
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self.completed = true;
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Ready(None)
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} else if self.parsed_bytes >= self.stats_conf.disk_stats_every.bytes() as u64 {
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let item = EventDataReadStats {
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parsed_bytes: self.parsed_bytes,
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};
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self.parsed_bytes = 0;
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let ret = EventChunkerItem::EventDataReadStats(item);
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Ready(Some(Ok(ret)))
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} else if self.sent_beyond_range {
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self.completed = true;
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Ready(None)
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} else if self.final_stats_sent {
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self.sent_beyond_range = true;
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if self.seen_beyond_range {
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Ready(Some(Ok(EventChunkerItem::RangeComplete)))
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} else {
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continue 'outer;
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}
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} else if self.data_emit_complete {
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let item = EventDataReadStats {
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parsed_bytes: self.parsed_bytes,
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};
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self.parsed_bytes = 0;
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let ret = EventChunkerItem::EventDataReadStats(item);
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self.final_stats_sent = true;
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Ready(Some(Ok(ret)))
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} else {
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match self.inp.poll_next_unpin(cx) {
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Ready(Some(Ok(mut fcr))) => {
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let r = self.parse_buf(&mut fcr.buf);
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match r {
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Ok(res) => {
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self.parsed_bytes += res.parsed_bytes;
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if fcr.buf.len() > 0 {
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// TODO gather stats about this:
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self.inp.put_back(fcr);
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}
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if self.need_min > 1024 * 8 {
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let msg = format!("spurious EventChunker asks for need_min {}", self.need_min);
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self.errored = true;
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Ready(Some(Err(Error::with_msg(msg))))
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} else {
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let x = self.need_min;
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self.inp.set_need_min(x);
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let ret = EventChunkerItem::Events(res.events);
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Ready(Some(Ok(ret)))
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}
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}
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Err(e) => {
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self.errored = true;
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Ready(Some(Err(e.into())))
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}
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}
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}
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Ready(Some(Err(e))) => {
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self.errored = true;
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Ready(Some(Err(e)))
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}
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Ready(None) => {
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self.data_emit_complete = true;
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continue 'outer;
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}
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Pending => Pending,
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}
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};
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}
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}
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}
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