- #!+sb-doc
- "%SP-Find-Character-With-Attribute String, Start, End, Table, Mask
- The codes of the characters of String from Start to End are used as indices
- into the Table, which is a U-Vector of 8-bit bytes. When the number picked
- up from the table bitwise ANDed with Mask is non-zero, the current
- index into the String is returned. The corresponds to SCANC on the Vax."