A very fast, reliable parser for DEC and ANSI terminal escape sequences. AnsiParser is a VT500-series state machine, based on Paul Williams' well-known parser diagram.
It handles ESC, CSI, DCS, OSC, APC, SOS, and PM sequences in both 7-bit and 8-bit form, UTF-8 and raw 8-bit text (switchable at runtime), and C0/C1 control bytes anywhere in the stream.
It can run as a dispatcher or as a transparent filter that reproduces its input byte-for-byte.

## Features

- Full sequence coverage: ESC, CSI, DCS, OSC, APC, SOS, PM, in both 7-bit and 8-bit forms.
- UTF-8 aware, switchable on the fly.
- Usable as a parser or a filter.
- Separate dispatch hook per sequence family.
- SIMD-accelerated (SSE2 / NEON) where available, scalar fallback otherwise.