Added cta::ByteArray::getAdler32()

common/CMakeLists.txt

@@ -47,7 +47,8 @@ target_link_libraries (ctacommon
   castorcommon
   pthread
   ${SQLITE3_LIBRARY_RELEASE}
-  uuid)
+  uuid
+  z)
 
 set (COMMON_UNIT_TESTS_LIB_SRC_FILES
   checksum/ByteArrayTest.cpp

common/checksum/ByteArray.cpp

@@ -19,6 +19,7 @@
 #include "common/checksum/ByteArray.hpp"
 
 #include <ostream>
+#include <zlib.h>
 
 //------------------------------------------------------------------------------
 // constructor
@@ -129,6 +130,14 @@ const uint8_t *cta::ByteArray::getBytes() const throw() {
   return m_bytes;
 }
 
+//------------------------------------------------------------------------------
+// getAdler32
+//------------------------------------------------------------------------------
+uint32_t cta::ByteArray::getAdler32() const {
+  const uint32_t checksum = adler32(0L, Z_NULL, 0);
+  return adler32(checksum, m_bytes, m_size);
+}
+
 //------------------------------------------------------------------------------
 // operator<<
 //------------------------------------------------------------------------------

common/checksum/ByteArray.hpp

@@ -118,6 +118,11 @@ public:
    */
   const uint8_t *getBytes() const throw();
 
+  /**
+   * Returns the adler 32 checksum of the array of bytes.
+   */
+  uint32_t getAdler32() const;
+
 private:
 
   /**

common/checksum/ByteArrayTest.cpp

@@ -206,4 +206,17 @@ TEST_F(cta_ByteArrayTest, equality_operator_ne) {
   ASSERT_NE(byteArray1, byteArray2);
 }
 
+TEST_F(cta_ByteArrayTest, adler32_empty_array) {
+  // The adler32 of an empty buffer is 1
+  cta::ByteArray byteArray;
+  ASSERT_EQ((uint32_t)1, byteArray.getAdler32());
+}
+
+TEST_F(cta_ByteArrayTest, adler32_array_of_character_1) {
+  // The adler32 of an empty buffer is 1
+  const uint8_t c = '1';
+  cta::ByteArray byteArray(1, &c);
+  ASSERT_EQ((uint32_t)0x320032, byteArray.getAdler32());
+}
+
 } // namespace unitTests