Janet 1.38.0-73334f3 Documentation
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UTF8

Typed Arrays Zip Files

Index

utf8/decode-rune utf8/encode-rune utf8/prefix->width

utf8/decode-rune cfunction source

(utf8/decode-rune buf &opt start)

Read a UTF-8 encoded Unicode codepoint from the buffer which starts at the given index. Returns a tuple [value width], where width = number of bytes consumed. If at the end of buffer or the buffer contains malformed UTF-8, returns [nil 0].

Community Examples
utf8/encode-rune cfunction source

(utf8/encode-rune rune &opt buf)

Encode a Unicode codepoint into the end of a buffer.

Community Examples
utf8/prefix->width cfunction source

(utf8/prefix->width c)

Given the first byte in an UTF-8 sequence, get the number of bytes that the codepoint sequence takes up, including the prefix byte.

Community Examples
Typed Arrays Zip Files