Function getNumBytesForUTF8

ext/src/llvm/ConvertUTF.cpp:519–521

* Exported function to return the total number of bytes in a codepoint * represented in UTF-8, given the value of the first byte. */

 * represented in UTF-8, given the value of the first byte.
 */
unsigned getNumBytesForUTF8(UTF8 first) {
  return trailingBytesForUTF8[first] + 1;
}

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