Java Code Examples for com.ibm.icu.text.UTF16#isLeadSurrogate()

The following examples show how to use com.ibm.icu.text.UTF16#isLeadSurrogate() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: ReplaceableUCharacterIterator.java    From fitnotifications with Apache License 2.0 6 votes vote down vote up 
/**
 * Returns the current codepoint
 * @return current codepoint
 */
@Override
public int currentCodePoint(){
    // cannot use charAt due to it different
    // behaviour when index is pointing at a
    // trail surrogate, check for surrogates

    int ch = current();
    if(UTF16.isLeadSurrogate((char)ch)){
        // advance the index to get the next code point
        next();
        // due to post increment semantics current() after next()
        // actually returns the next char which is what we want
        int ch2 = current();
        // current should never change the current index so back off
        previous();

        if(UTF16.isTrailSurrogate((char)ch2)){
            // we found a surrogate pair
            return Character.toCodePoint((char)ch, (char)ch2);
        }
    }
    return ch;
}
Example 2
Source File: IntTrie.java    From fitnotifications with Apache License 2.0 6 votes vote down vote up 
/**
* Get the value associated with a pair of surrogates.
* @param lead a lead surrogate
* @param trail a trail surrogate
*/
public final int getSurrogateValue(char lead, char trail)
{
    if (!UTF16.isLeadSurrogate(lead) || !UTF16.isTrailSurrogate(trail)) {
        throw new IllegalArgumentException(
            "Argument characters do not form a supplementary character");
    }
    // get fold position for the next trail surrogate
    int offset = getSurrogateOffset(lead, trail);

    // get the real data from the folded lead/trail units
    if (offset > 0) {
        return m_data_[offset];
    }

    // return m_initialValue_ if there is an error
    return m_initialValue_;
}
Example 3
Source File: CharacterIteration.java    From fitnotifications with Apache License 2.0 6 votes vote down vote up 
public static int previous32(CharacterIterator ci) {
    if (ci.getIndex() <= ci.getBeginIndex()) {
        return DONE32;   
    }
    char trail = ci.previous();
    int retVal = trail;
    if (UTF16.isTrailSurrogate(trail) && ci.getIndex()>ci.getBeginIndex()) {
        char lead = ci.previous();
        if (UTF16.isLeadSurrogate(lead)) {
            retVal = (((int)lead  - UTF16.LEAD_SURROGATE_MIN_VALUE) << 10) +
                      ((int)trail - UTF16.TRAIL_SURROGATE_MIN_VALUE) +
                      UTF16.SUPPLEMENTARY_MIN_VALUE;
        } else {
            ci.next();
        }           
    }
    return retVal;
}
Example 4
Source File: CharacterIteration.java    From fitnotifications with Apache License 2.0 6 votes vote down vote up 
public static int current32(CharacterIterator ci) {
    char  lead   = ci.current();
    int   retVal = lead;
    if (retVal < UTF16.LEAD_SURROGATE_MIN_VALUE) {
        return retVal;   
    }
    if (UTF16.isLeadSurrogate(lead)) {
        int  trail = (int)ci.next();
        ci.previous();
        if (UTF16.isTrailSurrogate((char)trail)) {
            retVal = ((lead  - UTF16.LEAD_SURROGATE_MIN_VALUE) << 10) +
                     (trail - UTF16.TRAIL_SURROGATE_MIN_VALUE) +
                     UTF16.SUPPLEMENTARY_MIN_VALUE;
        }
     } else {
        if (lead == CharacterIterator.DONE) {
            if (ci.getIndex() >= ci.getEndIndex())   {
                retVal = DONE32;   
            }
        }
     }
    return retVal;
}
Example 5
Source File: ReplaceableUCharacterIterator.java    From trekarta with GNU General Public License v3.0 6 votes vote down vote up 
/**
 * Returns the current codepoint
 * @return current codepoint
 */
@Override
public int currentCodePoint(){
    // cannot use charAt due to it different
    // behaviour when index is pointing at a
    // trail surrogate, check for surrogates

    int ch = current();
    if(UTF16.isLeadSurrogate((char)ch)){
        // advance the index to get the next code point
        next();
        // due to post increment semantics current() after next()
        // actually returns the next char which is what we want
        int ch2 = current();
        // current should never change the current index so back off
        previous();

        if(UTF16.isTrailSurrogate((char)ch2)){
            // we found a surrogate pair
            return Character.toCodePoint((char)ch, (char)ch2);
        }
    }
    return ch;
}