Module tac 

Functions

tac_bytes

Reverse records separated by a single byte using backward memrchr scanning. Scans backward from end, writes each record as found. No Vec allocation. Uses a backward-fill buffer: records are copied backward into an 8MB buffer, then flushed as a single write_all when full.

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.