#200: created macros for adding and setting bits

middleware/include/c_utils.h

@@ -1,18 +1,28 @@
-#ifndef C_UTILS
-#define C_UTILS
-
-/*
- * Will retrieve the container of a certain pointer given the container type and
- * its pointer Trick pulled from Linux Kernel
- */
-#define CONTAINER_OF(ptr, type, member) \
-	((type *)((char *)(ptr) - offsetof(type, member)))
-
-#endif /* C_UTILS */
-
-void endian_swap(void *ptr, int size);
-
-/// @brief Reverses the bit order of a byte
-/// @param b byte
-/// @return the same byte but wuth the bits reversed
+#ifndef C_UTILS
+#define C_UTILS
+
+/*
+ * Will retrieve the container of a certain pointer given the container type and
+ * its pointer Trick pulled from Linux Kernel
+ */
+#define CONTAINER_OF(ptr, type, member) \
+	((type *)((char *)(ptr) - offsetof(type, member)))
+
+/*
+ * Gets a bit of a binary number at desired location
+*/
+#define GET_BIT(num, bit) ((num >> bit) & 1)
+
+/*
+ * Sets a bit of a binary number at desired location
+*/
+#define SET_BIT(num, bit) (num |= (1UL << bit))
+
+#endif /* C_UTILS */
+
+void endian_swap(void *ptr, int size);
+
+/// @brief Reverses the bit order of a byte
+/// @param b byte
+/// @return the same byte but wuth the bits reversed
 unsigned char reverse_bits(unsigned char b);

middleware/src/c_utils.c

@@ -1,20 +1,20 @@
-#include "c_utils.h"
-
-void endian_swap(void *ptr, int size)
-{
-	char *p = (char *)ptr;
-	char tmp;
-	for (int i = 0; i < size / 2; i++) {
-		tmp = p[i];
-		p[i] = p[size - i - 1];
-		p[size - i - 1] = tmp;
-	}
-}
-
-unsigned char reverse_bits(unsigned char b)
-{
-	b = (b & 0xF0) >> 4 | (b & 0x0F) << 4;
-	b = (b & 0xCC) >> 2 | (b & 0x33) << 2;
-	b = (b & 0xAA) >> 1 | (b & 0x55) << 1;
-	return b;
+#include "c_utils.h"
+
+void endian_swap(void *ptr, int size)
+{
+	char *p = (char *)ptr;
+	char tmp;
+	for (int i = 0; i < size / 2; i++) {
+		tmp = p[i];
+		p[i] = p[size - i - 1];
+		p[size - i - 1] = tmp;
+	}
+}
+
+unsigned char reverse_bits(unsigned char b)
+{
+	b = (b & 0xF0) >> 4 | (b & 0x0F) << 4;
+	b = (b & 0xCC) >> 2 | (b & 0x33) << 2;
+	b = (b & 0xAA) >> 1 | (b & 0x55) << 1;
+	return b;
 }