Class PropsVectors.DefaultGetFoldedValue

java.lang.Object
com.ibm.icu.impl.PropsVectors.DefaultGetFoldedValue
All Implemented Interfaces:
TrieBuilder.DataManipulate
Enclosing class:
PropsVectors

private static class PropsVectors.DefaultGetFoldedValue extends Object implements TrieBuilder.DataManipulate
  • Field Details

  • Constructor Details

    • DefaultGetFoldedValue

      public DefaultGetFoldedValue(IntTrieBuilder inBuilder)
  • Method Details

    • getFoldedValue

      public int getFoldedValue(int start, int offset)
      Description copied from interface: TrieBuilder.DataManipulate
      Build-time trie callback function, used with serialize(). This function calculates a lead surrogate's value including a folding offset from the 1024 supplementary code points [start..start+1024[ . It is U+10000 invalid input: '<'= start invalid input: '<'= U+10fc00 and (startinvalid input: '&'0x3ff)==0. The folding offset is provided by the caller. It is offset=UTRIE_BMP_INDEX_LENGTH+n*UTRIE_SURROGATE_BLOCK_COUNT with n=0..1023. Instead of the offset itself, n can be stored in 10 bits - or fewer if it can be assumed that few lead surrogates have associated data. The returned value must be - not zero if and only if there is relevant data for the corresponding 1024 supplementary code points - such that UTrie.getFoldingOffset(UNewTrieGetFoldedValue(..., offset))==offset
      Specified by:
      getFoldedValue in interface TrieBuilder.DataManipulate
      Returns:
      a folded value, or 0 if there is no relevant data for the lead surrogate.