Function read_str_advance

nodedb-query/src/msgpack_scan/reader.rs:279–285

Read a string slice at `*off`, advancing `*off` past it. Zero-copy. Returns `None` for non-string types, invalid UTF-8, or truncated input.

(buf: &'a [u8], off: &mut usize)

/// Read a string slice at `*off`, advancing `*off` past it. Zero-copy.
/// Returns `None` for non-string types, invalid UTF-8, or truncated input.
pub fn read_str_advance<'a>(buf: &'a [u8], off: &mut usize) -> Option<&'a str> {
    let (start, len) = str_bounds(buf, *off)?;
    let bytes = buf.get(start..start + len)?;
    let s = str::from_utf8(bytes).ok()?;
    *off = start + len;
    Some(s)
}

/// Read a `bin` value at `*off`, advancing `*off` past it. Zero-copy —
/// the returned slice borrows from `buf`. Returns `None` for non-bin tags