Implemented and documented write8 function

include/write.h

@@ -0,0 +1,19 @@
+#include <stdint.h>
+
+/**
+ * @author cheng-alvin
+ * @since v0.0.1
+ *
+ * Writes 8 bits or a single byte to the specified `buffer`
+ * pointer. Useful for generating machine code in executables.
+ *
+ * @param buffer The pointer for the buffer to write to.
+ * @param value The value to write.
+ *
+ * @note Please note that the value should be 1 byte
+ * or 8 bits wide when passing into this function.
+ *
+ * @returns The pointer to the buffer.
+ */
+
+uint8_t *write8(uint8_t *buffer, uint8_t value);

src/codegen/write.c

@@ -0,0 +1,11 @@
+#include <stdint.h>
+#include <stdlib.h>
+
+uint8_t *write8(uint8_t *buffer, uint8_t value) {
+  const int len = *buffer / sizeof(uint8_t);
+  buffer = realloc(buffer, len + sizeof(uint8_t));
+
+  buffer[len] = value;
+
+  return buffer;
+}