First commit

index.js

@@ -0,0 +1,146 @@
+/**
+ *  Get one bit on a byte
+ * 
+ *  This is a byte of bits ===> ABCDEFGH
+ * 
+ *  getBIT(ABCDEFGH, 3) ==> E
+ */
+function getBIT(byte, order)
+{
+    return (byte >> order) & 1
+}
+/**
+ *  Update one bit on a byte
+ * 
+ *  This is a byte of bits ===> ABCDEFGH
+ * 
+ *  setBIT(ABCDEFGH, 3, 0) ==> ABCD0FGH
+ *  setBIT(ABCDEFGH, 3, 1) ==> ABCD1FGH
+ */
+function setBIT(byte, order, value)
+{
+    return (
+        value == 0
+    ) ? (
+        byte & (( 1 << order ) ^ 255)
+    ) : (
+        byte | ( 1 << order )
+    );
+};
+/**
+ *  Explode byte of per bits and given Function
+ *  and anonymous returning value is result
+ * 
+ *  This is a byte of bits ===> ABCDEFGH
+ * 
+ *  explodeBits(ABCDEFGH, (A, B, C, D, E, F, G, H) => {
+ *      return A
+ *  }) ===> A
+ * 
+ */
+function explodeBits(bytes, map)
+{
+    return map(
+        (bytes >> 7 & 1),
+        (bytes >> 6 & 1),
+        (bytes >> 5 & 1),
+        (bytes >> 4 & 1),
+        (bytes >> 3 & 1),
+        (bytes >> 2 & 1),
+        (bytes >> 1 & 1),
+        bytes & 1
+    )
+}
+/**
+ *  Explode byte of per bits and given Function
+ *  and anonymous returning value is result
+ * 
+ *  This is a byte of bits ===> ABCDEFGH
+ * 
+ *  implodeByte(A,B,C,D,E,F,G,H) ===> ABCDEFGH
+ */
+function implodeByte(a,b,c,d,e,f,g,h)
+{
+    return (a << 7) | (b << 6) | (c << 5) | (d << 4) | (e << 3) | (f << 2) | (g << 1) | h
+}
+/**
+ *  Explode byte of per bits and given Function
+ *  and anonymous returning value is result
+ * 
+ *  This is a byte of bits ===> ABCDEFGH
+ * 
+ *  explodeBits(ABCDEFGH, (A0000000, 0B000000, 00C00000, 000D0000, 0000E000, 00000F00, 000000G0, 0000000H) => {
+ *      return A
+ *  }) ===> A
+ * 
+ */
+function explodeBitValue(bytes, map)
+{
+    return map(
+        (bytes >> 7 & 1) << 7,
+        (bytes >> 6 & 1) << 6,
+        (bytes >> 5 & 1) << 5,
+        (bytes >> 4 & 1) << 4,
+        (bytes >> 3 & 1) << 3,
+        (bytes >> 2 & 1) << 2,
+        (bytes >> 1 & 1) << 1,
+        bytes & 1
+    )
+}
+/**
+ *  Explode byte of per bits and given Function
+ *  and anonymous returning value is result
+ * 
+ *  This is a byte of bits ===> ABCDEFGH
+ * 
+ *  implodeByte(A0000000, 0B000000, 00C00000, 000D0000, 0000E000, 00000F00, 000000G0, 0000000H) ===> ABCDEFGH
+ */
+function implodeBitValues(a,b,c,d,e,f,g,h)
+{
+    return a | b | c | d | e | f | g | h
+}
+/**
+ *  This is a byte of bits ===> ABCDEFGH
+ * 
+ *  rightShift(ABCDEFGH) ==> HABCDEFG
+ */
+function rightShift(byte)
+{
+    return explodeBits(byte, (a,b,c,d,e,f,g,h) => {
+        return implodeByte(h,a,b,c,d,e,f,g)
+    })
+}
+/**
+ *  This is a byte of bits ===> ABCDEFGH
+ * 
+ *  leftShift(ABCDEFGH) ==> BCDEFGHA
+ */
+function leftShift(byte)
+{
+    return explodeBits(byte, (a,b,c,d,e,f,g,h) => {
+        return implodeByte(b,c,d,e,f,g,h,a)
+    })
+}
+/**
+ * eachBlock([A,B,C,D,E,F,G,H], 3) ==> [A,B,C],[D,E,F],[G,H]
+ */
+function * eachBlock(bytesArray, size)
+{
+    let current = 0;
+    while(1)
+    {
+        let currentOffset = current * size;
+        let currentOffsetEnd = current * size + size;
+        let result = bytesArray.slice(
+            currentOffset,
+            currentOffsetEnd
+        );
+        if(result.length + size <= size)
+        {
+            return result
+        }else{
+            current++;
+            yield result
+        }
+    }
+}