Module tac 

Functions

tac_bytes

Reverse the records in data separated by a single byte separator and write to out. If before is true, the separator is attached before the record instead of after. Uses vectored I/O (writev) to write directly from mmap’d data — zero intermediate copies.

tac_regex_separator

Reverse records using a regex separator. Uses regex::bytes for direct byte-level matching (no UTF-8 conversion needed). NOTE: GNU tac uses POSIX Basic Regular Expressions (BRE), so we convert to ERE first. Uses backward scanning to match GNU tac’s re_search behavior.

tac_string_separator

Reverse records using a multi-byte string separator. Uses SIMD-accelerated memmem for substring search.