-/* Number of bytes in the string representation of a character */
-INLINE int REP_BYTES_BY_FIRST_BYTE (int fb);
-INLINE int
+/* Table of number of bytes in the string representation of a character
+ indexed by the first byte of that representation.
+
+ This value can be derived in other ways -- e.g. something like
+ XCHARSET_REP_BYTES (CHARSET_BY_LEADING_BYTE (first_byte))
+ but it's faster this way. */
+extern const Bytecount rep_bytes_by_first_byte[0xA0];
+
+/* Number of bytes in the string representation of a character. */
+INLINE_HEADER int REP_BYTES_BY_FIRST_BYTE (int fb);
+INLINE_HEADER int