Module tr 

Functions

complement

Parse a tr character set string into a Vec of expanded characters.

delete

delete_mmap

Delete from mmap’d byte slice.

delete_squeeze

delete_squeeze_mmap

Delete + squeeze from mmap’d byte slice.

expand_set2

Expand SET2 to match SET1 length for translation. If SET2 has [c*] repeats, fill them. Otherwise repeat last char.

parse_set

Parse a SET string into expanded bytes.

squeeze

squeeze_mmap

Squeeze from mmap’d byte slice.

translate

translate_mmap

Maximum data size for single-allocation translate approach. Translate bytes from an mmap’d byte slice. Detects single-range translations (e.g., a-z to A-Z) and uses SIMD vectorized arithmetic (AVX2: 32 bytes/iter, SSE2: 16 bytes/iter) for those cases. Falls back to scalar 256-byte table lookup for general translations.

translate_mmap_inplace

Translate bytes in-place on a mutable buffer (e.g., MAP_PRIVATE mmap). Eliminates the output buffer allocation entirely — the kernel’s COW semantics mean only modified pages are physically copied.

translate_mmap_readonly

Translate from a read-only mmap (or any byte slice) to a separate output buffer. Avoids MAP_PRIVATE COW page faults by reading from the original data and writing to a freshly allocated heap buffer.

translate_owned

Translate bytes in-place on an owned buffer, then write. For piped stdin where we own the data, this avoids the separate output buffer allocation needed by translate_mmap. Uses parallel in-place SIMD for large data.

translate_squeeze

translate_squeeze_mmap

Translate + squeeze from mmap’d byte slice.