Struct ReaderConfig 

struct ReaderConfig {
    rsp: ReadStatPath,
    offsets: Vec<u32>,
    parallel: bool,
    column_filter: Option<Arc<BTreeMap<i32, i32>>>,
    original_var_count: i32,
    total_rows_processed: Arc<AtomicUsize>,
    var_count: i32,
    vars: Arc<BTreeMap<i32, ReadStatVarMetadata>>,
    schema: Arc<Schema>,
    progress: Option<Arc<IndicatifProgress>>,
    wc: WriteConfig,
}

Inputs to the reader thread spawned by run_data.

Bundles the parse configuration so spawn_reader takes a single named value rather than a long positional argument list.

Fields

rsp: ReadStatPath

Validated input path; moves into the reader thread.

offsets: Vec<u32>

Chunk boundaries from build_offsets; consumed as windows(2) pairs.

parallel: bool

Whether to parse chunks concurrently on the rayon pool.

column_filter: Option<Arc<BTreeMap<i32, i32>>>

Optional original-index → filtered-index column mapping.

original_var_count: i32

Unfiltered variable count, for row-boundary detection under filtering.

total_rows_processed: Arc<AtomicUsize>

Shared counter of rows processed across all chunks.

var_count: i32

(Possibly filtered) variable count.

vars: Arc<BTreeMap<i32, ReadStatVarMetadata>>

Shared variable metadata.

schema: Arc<Schema>

Shared Arrow schema.

progress: Option<Arc<IndicatifProgress>>

Optional progress callback.

wc: WriteConfig

Output configuration, sent alongside each chunk for the writer.