Function CheckAndWarnCodePoint

be/src/exprs/mask-functions-ir.cc:115–122

Checks whether the unicode code point is malformed, i.e. illegal or incomplete, and warns if it is. Returns true if any warning is added.

/// Checks whether the unicode code point is malformed, i.e. illegal or incomplete, and
/// warns if it is. Returns true if any warning is added.
static bool CheckAndWarnCodePoint(FunctionContext* ctx, uint32_t code_point) {
  if (code_point == utf::illegal || code_point == utf::incomplete) {
    ctx->AddWarning(Substitute("String contains $0 code point. Return NULL.",
        code_point == utf::illegal ? "illegal" : "incomplete").c_str());
    return true;
  }
  return false;
}

/// Mask the substring in range [start, end) of the given string value. Using rules in
/// 'MaskTransform'. Indices are counted in UTF-8 code points.