Module cut

Structs§

cut_bytes: Cut bytes/chars from a line. Writes selected bytes to out.
cut_field1_inplace: In-place field 1 extraction: modifies data buffer directly, returns new length. Output is always <= input (we remove everything after first delimiter per line). Avoids intermediate Vec allocation + BufWriter copy, saving ~10MB of memory bandwidth for 10MB input. Requires owned mutable data (not mmap).
cut_fields: Cut fields from a line using a delimiter. Writes to out.
parse_ranges: Parse a LIST specification like “1,3-5,7-” into ranges. Each range is 1-based. Returns sorted, merged ranges.
process_cut_data: Process a full data buffer (from mmap or read) with cut operation.
process_cut_reader: Process input from a reader (for stdin). Uses batch reading: reads large chunks (16MB), then processes them in batch using the fast mmap-based paths, avoiding per-line read_until syscall overhead. 16MB chunks mean a 10MB piped input is consumed in a single batch.