add hardcoded instance types

Author: yangzhaofeng

core/include/huaweicloud/core/utils/Hasher.h

@@ -34,9 +34,10 @@ class HUAWEICLOUD_CORE_EXPORT Hasher {
     std::string hexEncode(const unsigned char *md, size_t length) const;
     int hashSHA256(const std::string &str, unsigned char *hash, int i);
     std::vector<unsigned char> hmac(const void *key, unsigned int keyLength, const std::string &data);
+    int hashstring(const char* strTohash);
 };
 }
 }
 }
 }
-#endif // HUAWEICLOUD_SDK_CORE_UTILS_HASHER_H
+#endif // HUAWEICLOUD_SDK_CORE_UTILS_HASHER_H

core/src/utils/Hasher.cpp

@@ -73,3 +73,17 @@ std::vector<unsigned char> Hasher::hmac(const void *key, unsigned int keyLength,
             strlen(charData.data()), md.data(), &mdLength);
     return md;
 }
+
+int Hasher::hashstring(const char* strTohash)
+{
+    if (!strTohash)
+        return 0;
+
+    unsigned hash = 0;
+    while (char charValue = *strTohash++)
+    {
+        hash = charValue + 31 * hash;    
+    }
+
+    return hash;
+}