* Refactoring: hash class.

src/hash.hh

@@ -0,0 +1,34 @@
+#ifndef __HASH_H
+#define __HASH_H
+
+#include <string>
+
+#include "util.hh"
+
+using namespace std;
+
+
+struct Hash
+{
+    static const unsigned int hashSize = 16;
+    unsigned char hash[hashSize];
+
+    Hash();
+    bool operator == (Hash & h2);
+    bool operator != (Hash & h2);
+    operator string() const;
+};
+
+
+class BadRefError : public Error
+{
+public:
+    BadRefError(string _err) : Error(_err) { };
+};
+
+
+Hash parseHash(const string & s);
+bool isHash(const string & s);
+Hash hashFile(const string & fileName);
+
+#endif /* !__HASH_H */