public boolean scanData()

in src/main/java/org/apache/sling/scripting/jsp/jasper/xmlparser/XMLEncodingDetector.java [684:816]
118 lines of code
30 McCabe index (conditional complexity)

    public boolean scanData(String delimiter, XMLStringBuffer buffer)
	throws IOException {

	boolean done = false;
	int delimLen = delimiter.length();
	char charAt0 = delimiter.charAt(0);
	boolean external = fCurrentEntity.isExternal();
	do {
    
	    // load more characters, if needed
    
	    if (fCurrentEntity.position == fCurrentEntity.count) {
		load(0, true);
	    }
	    else if (fCurrentEntity.position >= fCurrentEntity.count - delimLen) {
		System.arraycopy(fCurrentEntity.ch, fCurrentEntity.position,
				 fCurrentEntity.ch, 0, fCurrentEntity.count - fCurrentEntity.position);
		load(fCurrentEntity.count - fCurrentEntity.position, false);
		fCurrentEntity.position = 0;
	    } 
	    if (fCurrentEntity.position >= fCurrentEntity.count - delimLen) {
		// something must be wrong with the input: e.g., file ends an
		// unterminated comment
		int length = fCurrentEntity.count - fCurrentEntity.position;
		buffer.append (fCurrentEntity.ch, fCurrentEntity.position,
			       length); 
		fCurrentEntity.columnNumber += fCurrentEntity.count;
		fCurrentEntity.position = fCurrentEntity.count;
		load(0,true);
		return false;
	    }
    
	    // normalize newlines
	    int offset = fCurrentEntity.position;
	    int c = fCurrentEntity.ch[offset];
	    int newlines = 0;
	    if (c == '\n' || (c == '\r' && external)) {
		do {
		    c = fCurrentEntity.ch[fCurrentEntity.position++];
		    if (c == '\r' && external) {
			newlines++;
			fCurrentEntity.lineNumber++;
			fCurrentEntity.columnNumber = 1;
			if (fCurrentEntity.position == fCurrentEntity.count) {
			    offset = 0;
			    fCurrentEntity.position = newlines;
			    if (load(newlines, false)) {
				break;
			    }
			}
			if (fCurrentEntity.ch[fCurrentEntity.position] == '\n') {
			    fCurrentEntity.position++;
			    offset++;
			}
			/*** NEWLINE NORMALIZATION ***/
			else {
			    newlines++;
			}
		    }
		    else if (c == '\n') {
			newlines++;
			fCurrentEntity.lineNumber++;
			fCurrentEntity.columnNumber = 1;
			if (fCurrentEntity.position == fCurrentEntity.count) {
			    offset = 0;
			    fCurrentEntity.position = newlines;
			    fCurrentEntity.count = newlines;
			    if (load(newlines, false)) {
				break;
			    }
			}
		    }
		    else {
			fCurrentEntity.position--;
			break;
		    }
		} while (fCurrentEntity.position < fCurrentEntity.count - 1);
		for (int i = offset; i < fCurrentEntity.position; i++) {
		    fCurrentEntity.ch[i] = '\n';
		}
		int length = fCurrentEntity.position - offset;
		if (fCurrentEntity.position == fCurrentEntity.count - 1) {
		    buffer.append(fCurrentEntity.ch, offset, length);
		    return true;
		}
	    }
    
	    // iterate over buffer looking for delimiter
	OUTER: while (fCurrentEntity.position < fCurrentEntity.count) {
	    c = fCurrentEntity.ch[fCurrentEntity.position++];
	    if (c == charAt0) {
		// looks like we just hit the delimiter
		int delimOffset = fCurrentEntity.position - 1;
		for (int i = 1; i < delimLen; i++) {
		    if (fCurrentEntity.position == fCurrentEntity.count) {
			fCurrentEntity.position -= i;
			break OUTER;
		    }
		    c = fCurrentEntity.ch[fCurrentEntity.position++];
		    if (delimiter.charAt(i) != c) {
			fCurrentEntity.position--;
			break;
		    }
		}
		if (fCurrentEntity.position == delimOffset + delimLen) {
		    done = true;
		    break;
		}
	    }
	    else if (c == '\n' || (external && c == '\r')) {
		fCurrentEntity.position--;
		break;
	    }
	    else if (XMLChar.isInvalid(c)) {
		fCurrentEntity.position--;
		int length = fCurrentEntity.position - offset;
		fCurrentEntity.columnNumber += length - newlines;
		buffer.append(fCurrentEntity.ch, offset, length); 
		return true;
	    }
	}
	    int length = fCurrentEntity.position - offset;
	    fCurrentEntity.columnNumber += length - newlines;
	    if (done) {
		length -= delimLen;
	    }
	    buffer.append (fCurrentEntity.ch, offset, length);
    
	    // return true if string was skipped
	} while (!done);
	return !done;

    }