Create ExtractBits.c

ExtractBits.c

@@ -0,0 +1,36 @@
+#include <stdio.h>
+#include <stdint.h>
+/* Extracting bits from a byte */
+uint32_t extractBits(uint8_t number, int startBit, int endBit) {
+     startBit = (startBit < 0) ? 0 : (startBit > 8) ? 8 : startBit;
+    endBit = (endBit < 0) ? 0 : (endBit > 8) ? 8 : endBit;
+
+
+    if (startBit > endBit) {
+        int temp = startBit;
+        startBit = endBit;
+        endBit = temp;
+    }
+
+
+    uint8_t bitmask = ((1U << (endBit - startBit + 1)) - 1) << startBit;
+
+
+    uint8_t extractedBits = (number & bitmask) >> startBit;
+
+    return extractedBits;
+}
+
+int main() {
+    uint8_t number = 0b10010101; 
+
+    int startBit = 7;
+    int endBit = 7;
+
+    uint8_t result = extractBits(number, startBit, endBit);
+
+    printf("Original number: 0b%b\n", number);
+    printf("Extracted bits  : 0b%b\n", result);
+
+    return 0;
+}