public void testCopyHeapCharBuffer() {
String s = "abcde";
CharBuffer buffer = CharBuffer.allocate(s.length());
buffer.append(s);
buffer.rewind();
assertNotNull(CharArrayUtil.fromSequenceWithoutCopying(buffer));
assertNotNull(CharArrayUtil.fromSequenceWithoutCopying(buffer.subSequence(0, 5)));
// assertNull(CharArrayUtil.fromSequenceWithoutCopying(buffer.subSequence(0, 4))); // end index
// is not checked
assertNull(CharArrayUtil.fromSequenceWithoutCopying(buffer.subSequence(1, 5)));
assertNull(CharArrayUtil.fromSequenceWithoutCopying(buffer.subSequence(1, 2)));
}
private static ImmutableText valueOf(@NotNull CharSequence str, int start, int end) {
int length = end - start;
if (length <= BLOCK_SIZE) {
return new ImmutableText(CharArrayUtil.fromSequence(str, start, end));
}
// Splits on a block boundary.
int half = ((length + BLOCK_SIZE) >> 1) & BLOCK_MASK;
return new ImmutableText(valueOf(str, start, start + half), valueOf(str, start + half, end));
}
