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Std\Utf16

UTF-8 byte offsets ↔ LSP UTF-16 positions.

Matches the C++ yls mapper (include/yona/Lsp/Utf16.h): 0-based line, UTF-16 code-unit column, CRLF as one line break, non-BMP scalars as two units. The same functions are the documented C ABI in include/yona/Runtime/Codecs/Utf16.h.

Functions

Section titled “Functions”

offsetToLine : String -> Int -> Int

Section titled “offsetToLine : String -> Int -> Int”

Line of the UTF-16 position for a UTF-8 byte offset.

offsetToCharacter : String -> Int -> Int

Section titled “offsetToCharacter : String -> Int -> Int”

Character (UTF-16 column) of the UTF-16 position for a UTF-8 byte offset.

positionToOffset : String -> Int -> Int -> Int

Section titled “positionToOffset : String -> Int -> Int -> Int”

UTF-8 byte offset for an LSP (line, character) position.

offsetToLine "ab\ncd" 4          # => 1
offsetToCharacter "ab\ncd" 4     # => 1
positionToOffset "ab\ncd" 1 1    # => 4