wrap zlibs checksum functionality

2011-09-12 11:49:42 +01:00
parent aafcfaaa19
commit 1f6f79782a
3 changed files with 49 additions and 1 deletions
--- a/checksum.cc
+++ b/checksum.cc
@@ -0,0 +1,25 @@
+#include "checksum.h"
+
+#include <zlib.h>
+
+using namespace base;
+
+//----------------------------------------------------------------
+
+crc32::crc32(uint32_t seed)
+	: sum_(seed) {
+}
+
+void
+crc32::append(void const *buffer, unsigned len)
+{
+	sum_ = ::crc32(sum_, reinterpret_cast<Bytef const *>(buffer), len);
+}
+
+uint32_t
+crc32::get_sum() const
+{
+	return sum_;
+}
+
+//----------------------------------------------------------------