1 files changed, 48 insertions, 0 deletions
diff --git a/src/mercury/include/mercury_hash_string.h b/src/mercury/include/mercury_hash_string.h
new file mode 100644
index 0000000..0b136ca
--- /dev/null
+++ b/src/mercury/include/mercury_hash_string.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2013-2020 Argonne National Laboratory, Department of Energy,
+ *                    UChicago Argonne, LLC and The HDF Group.
+ * All rights reserved.
+ *
+ * The full copyright notice, including terms governing use, modification,
+ * and redistribution, is contained in the COPYING file that can be
+ * found at the root of the source code distribution tree.
+ */
+
+#ifndef MERCURY_HASH_STRING_H
+#define MERCURY_HASH_STRING_H
+
+#include "mercury_util_config.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Hash function name for unique ID to register.
+ *
+ * \param string [IN]           string name
+ *
+ * \return Non-negative ID that corresponds to string name
+ */
+static HG_UTIL_INLINE unsigned int
+hg_hash_string(const char *string)
+{
+    /* This is the djb2 string hash function */
+
+    unsigned int         result = 5381;
+    const unsigned char *p;
+
+    p = (const unsigned char *)string;
+
+    while (*p != '\0') {
+        result = (result << 5) + result + *p;
+        ++p;
+    }
+    return result;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MERCURY_HASH_STRING_H */