1 files changed, 62 insertions, 0 deletions
diff --git a/Source/Kernel/Library/Bitset.class.cpp b/Source/Kernel/Library/Bitset.class.cpp
new file mode 100644
index 0000000..ec4e62c
--- /dev/null
+++ b/Source/Kernel/Library/Bitset.class.cpp
@@ -0,0 +1,62 @@
+#include "Bitset.class.h"
+
+Bitset::Bitset() {
+}
+
+Bitset::Bitset(u32int size) {
+	init(size, (u32int*)Mem::kalloc(INDEX_FROM_BIT(size)));
+}
+
+Bitset::Bitset(u32int size, u32int *ptr) {
+	init(size, ptr);
+}
+
+Bitset::~Bitset() {
+	Mem::kfree(m_data);
+}
+
+void Bitset::init(u32int size, u32int *ptr) {
+	m_size = size;
+	m_data = ptr;
+	for (u32int i = 0; i < INDEX_FROM_BIT(m_size); i++) {
+		m_data[i] = 0;
+	}
+	m_usedCount = 0;
+}
+
+void Bitset::setBit(u32int number) {
+	u32int idx = INDEX_FROM_BIT(number);
+	u32int off = OFFSET_FROM_BIT(number);
+	m_data[idx] |= (0x1 << off);
+	m_usedCount++;
+}
+
+void Bitset::clearBit(u32int number) {
+	u32int idx = INDEX_FROM_BIT(number);
+	u32int off = OFFSET_FROM_BIT(number);
+	m_data[idx] &= ~(0x1 << off);
+	m_usedCount--;
+}
+
+bool Bitset::testBit(u32int number) {
+	u32int idx = INDEX_FROM_BIT(number);
+	u32int off = OFFSET_FROM_BIT(number);
+	return (m_data[idx] & (0x1 << off));
+}
+
+u32int Bitset::firstFreeBit() {
+	for (u32int i = 0; i < INDEX_FROM_BIT(m_size); i++) {
+		if (m_data[i] != 0xFFFFFFFF) {
+			for (int j = 0; j < 32; j++) {
+				if (!(m_data[i] & (0x1 << j))) {
+					return (i * 4 * 8) + j;
+				}
+			}
+		}
+	}
+	return (u32int) - 1;
+}
+
+u32int Bitset::usedBits() {
+	return m_usedCount;
+}