262 

   263 

   264 

   265 

   266 inline TBool TChar::IsSupplementary(TUint aChar)

   267 /**

   268 @param aChar The 32-bit code point value of a Unicode character.

   269 

   270 @return True, if aChar is supplementary character; false, otherwise.

   271 */

   272 	{

   273 	return (aChar > 0xFFFF);

   274 	}

   275 

   276 

   277 

   278 

   279 inline TBool TChar::IsSurrogate(TText16 aInt16)

   280 /**

   281 @return True, if aText16 is high surrogate or low surrogate; false, otherwise.

   282 */

   283 	{

   284 	return (aInt16 & 0xF800) == 0xD800;

   285 	}

   286 

   287 

   288 

   289 

   290 inline TBool TChar::IsHighSurrogate(TText16 aInt16)

   291 /**

   292 @return True, if aText16 is high surrogate; false, otherwise.

   293 */

   294 	{

   295 	return (aInt16 & 0xFC00) == 0xD800;

   296 	}

   297 

   298 

   299 

   300 

   301 inline TBool TChar::IsLowSurrogate(TText16 aInt16)

   302 /**

   303 @return True, if aText16 is low surrogate; false, otherwise.

   304 */

   305 	{

   306 	return (aInt16 & 0xFC00) == 0xDC00;

   307 	}

   308 

   309 

   310 

   311 

   312 inline TUint TChar::JoinSurrogate(TText16 aHighSurrogate, TText16 aLowSurrogate)

   313 /**

   314 Combine a high surrogate and a low surrogate into a supplementary character.

   315 

   316 @return The 32-bit code point value of the generated Unicode supplementary

   317         character.

   318 */

   319 	{

   320 	return ((aHighSurrogate - 0xD7F7) << 10) + aLowSurrogate;

   321 	}

   322 

   323 

   324 

   325 

   326 inline TText16 TChar::GetHighSurrogate(TUint aChar)

   327 /**

   328 Retrieve the high surrogate of a supplementary character.

   329 

   330 @param aChar The 32-bit code point value of a Unicode character.

   331 

   332 @return High surrogate of aChar, if aChar is a supplementary character; 

   333         aChar itself, if aChar is not a supplementary character.

   334 

   335 @see TChar::GetLowSurrogate

   336 */

   337 	{

   338 	return STATIC_CAST(TText16, 0xD7C0 + (aChar >> 10));

   339 	}

   340 

   341 

   342 

   343 

   344 inline TText16 TChar::GetLowSurrogate(TUint aChar)

   345 /**

   346 Retrieve the low surrogate of a supplementary character.

   347 

   348 @param aChar The 32-bit code point value of a Unicode character.

   349 

   350 @return Low surrogate of aChar, if aChar is a supplementary character; 

   351         zero, if aChar is not a supplementary character.

   352 

   353 @see TChar::GetHighSurrogate

   354 */

   355 	{

   356 	return STATIC_CAST(TText16, 0xDC00 | (aChar & 0x3FF));

   357 	}