Initial commit

src/main/java/me/finn/unlegitlibrary/number/bit/BitArrayVersion.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2024 UnlegitDqrk - All Rights Reserved
+ *
+ * You are unauthorized to remove this copyright.
+ * You have to give Credits to the Author in your project and link this GitHub site: https://github.com/UnlegitDqrk
+ * See LICENSE-File if exists
+ */
+
+package me.finn.unlegitlibrary.number.bit;
+
+public enum BitArrayVersion {
+
+    V16(16, 2, null),
+    V8(8, 4, V16),
+    V6(6, 5, V8), // 2 bit padding
+    V5(5, 6, V6), // 2 bit padding
+    V4(4, 8, V5),
+    V3(3, 10, V4), // 2 bit padding
+    V2(2, 16, V3),
+    V1(1, 32, V2);
+
+    public final byte bits; //TODO: probably make this private again just because
+    public final byte entriesPerWord; //TODO: probably make this private again just because
+    public final int maxEntryValue; //TODO: probably make this private again just because
+    private final BitArrayVersion next;
+
+    BitArrayVersion(int bits, int entriesPerWord, BitArrayVersion next) {
+        this.bits = (byte) bits;
+        this.entriesPerWord = (byte) entriesPerWord;
+        this.maxEntryValue = (1 << this.bits) - 1;
+        this.next = next;
+    }
+
+    public static BitArrayVersion get(int version, boolean read) {
+        for (BitArrayVersion ver : values())
+            if ((!read && ver.entriesPerWord <= version) || (read && ver.bits == version)) return ver;
+
+        return null;
+    }
+
+    public final BitArray createPalette(int size) {
+        return this.createPalette(size, new int[this.getWordsForSize(size)]);
+    }
+
+    public final byte getId() {
+        return bits;
+    }
+
+    public final int getWordsForSize(int size) {
+        return (size / entriesPerWord) + (size % entriesPerWord == 0 ? 0 : 1);
+    }
+
+    public final int getMaxEntryValue() {
+        return maxEntryValue;
+    }
+
+    public final BitArrayVersion next() {
+        return next;
+    }
+
+    public final BitArray createPalette(int size, int[] words) {
+        if (this == V3 || this == V5 || this == V6)
+            // Padded palettes aren't able to use bitwise operations due to their padding.
+            return new PaddedBitArray(this, size, words);
+        else return new Pow2BitArray(this, size, words);
+    }
+
+}