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package org.holoeverywhere.util;
public class CharSequences {
public static int compareToIgnoreCase(CharSequence me, CharSequence another) {
int myLen = me.length(), anotherLen = another.length();
int myPos = 0, anotherPos = 0, result;
int end = myLen < anotherLen ? myLen : anotherLen;
while (myPos < end) {
if ((result = Character.toLowerCase(me.charAt(myPos++))
- Character.toLowerCase(another.charAt(anotherPos++))) != 0) {
return result;
}
}
return myLen - anotherLen;
}
public static boolean equals(CharSequence a, CharSequence b) {
if (a.length() != b.length()) {
return false;
}
int length = a.length();
for (int i = 0; i < length; i++) {
if (a.charAt(i) != b.charAt(i)) {
return false;
}
}
return true;
}
public static CharSequence forAsciiBytes(final byte[] bytes) {
return new CharSequence() {
@Override
public char charAt(int index) {
return (char) bytes[index];
}
@Override
public int length() {
return bytes.length;
}
@Override
public CharSequence subSequence(int start, int end) {
return CharSequences.forAsciiBytes(bytes, start, end);
}
@Override
public String toString() {
return new String(bytes);
}
};
}
public static CharSequence forAsciiBytes(final byte[] bytes,
final int start, final int end) {
CharSequences.validate(start, end, bytes.length);
return new CharSequence() {
@Override
public char charAt(int index) {
return (char) bytes[index + start];
}
@Override
public int length() {
return end - start;
}
@Override
public CharSequence subSequence(int newStart, int newEnd) {
newStart -= start;
newEnd -= start;
CharSequences.validate(newStart, newEnd, length());
return CharSequences.forAsciiBytes(bytes, newStart, newEnd);
}
@Override
public String toString() {
return new String(bytes, start, length());
}
};
}
static void validate(int start, int end, int length) {
if (start < 0 || end < 0 || end > length || start > end) {
throw new IndexOutOfBoundsException();
}
}
}
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