Module utf 

UTF-8 / UTF-16 index conversion helpers.

These utilities are primarily intended for platform bridges (e.g. wasm DOM IME/text input), where selection and composition ranges are typically expressed in UTF-16 code unit offsets.

Conversions are deterministic and clamp to valid UTF-8 char boundaries.

Enums

UtfIndexClamp

Clamp strategy when converting an offset that may land inside a multi-unit character.

Functions

utf8_byte_offset_to_utf16_offset

Convert a UTF-8 byte offset into a UTF-16 code unit offset.

utf8_byte_range_to_utf16_range

Convert a UTF-8 byte range to a UTF-16 range.

utf16_offset_to_utf8_byte_offset

Convert a UTF-16 code unit offset into a UTF-8 byte offset.

utf16_range_to_utf8_byte_range

Convert a UTF-16 range to a UTF-8 byte range.