C++ LocalPointer::reset方法代码示例

int32_t ULISentenceBreakIterator::next() {
  int32_t n = fDelegate->next();
  if(n == UBRK_DONE || // at end  or
     fBackwardsTrie.isNull()) { // .. no backwards table loaded == no exceptions
    return n;
  }
  // OK, do we need to break here?
  UErrorCode status = U_ZERO_ERROR;
  // refresh text
  fText.adoptInstead(fDelegate->getUText(fText.orphan(), status));
  //if(debug2) u_printf("str, native len=%d\n", utext_nativeLength(fText.getAlias()));
  do { // outer loop runs once per underlying break (from fDelegate).
    // loops while 'n' points to an exception.
    utext_setNativeIndex(fText.getAlias(), n); // from n..
    fBackwardsTrie->reset();
    UChar32 uch;
    //if(debug2) u_printf(" [email protected] %d\n", n);
    // Assume a space is following the '.'  (so we handle the case:  "Mr. /Brown")
    if((uch=utext_previous32(fText.getAlias()))==(UChar32)0x0020) {  // TODO: skip a class of chars here??
      // TODO only do this the 1st time?
      //if(debug2) u_printf("skipping prev: |%C| \n", (UChar)uch);
    } else {
      //if(debug2) u_printf("not skipping prev: |%C| \n", (UChar)uch);
      uch = utext_next32(fText.getAlias());
      //if(debug2) u_printf(" -> : |%C| \n", (UChar)uch);
    }
    UStringTrieResult r = USTRINGTRIE_INTERMEDIATE_VALUE;

    int32_t bestPosn = -1;
    int32_t bestValue = -1;

    while((uch=utext_previous32(fText.getAlias()))!=U_SENTINEL  &&   // more to consume backwards and..
          USTRINGTRIE_HAS_NEXT(r=fBackwardsTrie->nextForCodePoint(uch))) {// more in the trie
      if(USTRINGTRIE_HAS_VALUE(r)) { // remember the best match so far
        bestPosn = utext_getNativeIndex(fText.getAlias());
        bestValue = fBackwardsTrie->getValue();
      }
      //if(debug2) u_printf("rev< /%C/ cont?%d @%d\n", (UChar)uch, r, utext_getNativeIndex(fText.getAlias()));
    }

    if(USTRINGTRIE_MATCHES(r)) { // exact match?
      //if(debug2) u_printf("rev<?/%C/?end of seq.. r=%d, bestPosn=%d, bestValue=%d\n", (UChar)uch, r, bestPosn, bestValue);
      bestValue = fBackwardsTrie->getValue();
      bestPosn = utext_getNativeIndex(fText.getAlias());
      //if(debug2) u_printf("rev<+/%C/+end of seq.. r=%d, bestPosn=%d, bestValue=%d\n", (UChar)uch, r, bestPosn, bestValue);
    }

    if(bestPosn>=0) {
      //if(debug2) u_printf("rev< /%C/ end of seq.. r=%d, bestPosn=%d, bestValue=%d\n", (UChar)uch, r, bestPosn, bestValue);

      //if(USTRINGTRIE_MATCHES(r)) {  // matched - so, now what?
      //int32_t bestValue = fBackwardsTrie->getValue();
      ////if(debug2) u_printf("rev< /%C/ matched, skip..%d  bestValue=%d\n", (UChar)uch, r, bestValue);

      if(bestValue == kMATCH) { // exact match!
        //if(debug2) u_printf(" exact backward match\n");
        n = fDelegate->next(); // skip this one. Find the next lowerlevel break.
        if(n==UBRK_DONE) return n;
        continue; // See if the next is another exception.
      } else if(bestValue == kPARTIAL
                && fForwardsPartialTrie.isValid()) { // make sure there's a forward trie
        //if(debug2) u_printf(" partial backward match\n");
        // We matched the "Ph." in "Ph.D." - now we need to run everything through the forwards trie
        // to see if it matches something going forward.
        fForwardsPartialTrie->reset();
        UStringTrieResult rfwd = USTRINGTRIE_INTERMEDIATE_VALUE;
        utext_setNativeIndex(fText.getAlias(), bestPosn); // hope that's close ..
        //if(debug2) u_printf("Retrying at %d\n", bestPosn);
        while((uch=utext_next32(fText.getAlias()))!=U_SENTINEL &&
              USTRINGTRIE_HAS_NEXT(rfwd=fForwardsPartialTrie->nextForCodePoint(uch))) {
          //if(debug2) u_printf("fwd> /%C/ cont?%d @%d\n", (UChar)uch, rfwd, utext_getNativeIndex(fText.getAlias()));
        }
        if(USTRINGTRIE_MATCHES(rfwd)) {
          //if(debug2) u_printf("fwd> /%C/ == forward match!\n", (UChar)uch);
          // only full matches here, nothing to check
          // skip the next:
          n = fDelegate->next();
          if(n==UBRK_DONE) return n;
          continue;
        } else {
          //if(debug2) u_printf("fwd> /%C/ no match.\n", (UChar)uch);
          // no match (no exception) -return the 'underlying' break
          return n;
        }
      } else {
        return n; // internal error and/or no forwards trie
      }
    } else {
      //if(debug2) u_printf("rev< /%C/ .. no match..%d\n", (UChar)uch, r);  // no best match
      return n; // No match - so exit. Not an exception.
    }
  } while(n != UBRK_DONE);
  return n;
}