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+/**
+ * @copyright
+ * ====================================================================
+ *    Licensed to the Apache Software Foundation (ASF) under one
+ *    or more contributor license agreements.  See the NOTICE file
+ *    distributed with this work for additional information
+ *    regarding copyright ownership.  The ASF licenses this file
+ *    to you under the Apache License, Version 2.0 (the
+ *    "License"); you may not use this file except in compliance
+ *    with the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing,
+ *    software distributed under the License is distributed on an
+ *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *    KIND, either express or implied.  See the License for the
+ *    specific language governing permissions and limitations
+ *    under the License.
+ * ====================================================================
+ * @endcopyright
+ *
+ * @file svn_pseudo_md5.h
+ * @brief Subversion hash sum calculation for runtime data (only)
+ */
+
+#ifndef SVN_PSEUDO_MD5_H
+#define SVN_PSEUDO_MD5_H
+
+#include <apr.h>        /* for apr_uint32_t */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+/**
+ * Calculates a hash sum for 15 bytes in @a x and returns it in @a digest.
+ * The most significant byte in @a x must be 0 (independent of being on a
+ * little or big endian machine).
+ *
+ * @note Use for runtime data hashing only.
+ *
+ * @note The output is NOT an MD5 digest shares has the same basic
+ *       cryptographic properties.  Collisions with proper MD5 on the same
+ *       or other input data is equally unlikely as any MD5 collision.
+ */
+void svn__pseudo_md5_15(apr_uint32_t digest[4],
+                        const apr_uint32_t x[4]);
+
+/**
+ * Calculates a hash sum for 31 bytes in @a x and returns it in @a digest.
+ * The most significant byte in @a x must be 0 (independent of being on a
+ * little or big endian machine).
+ *
+ * @note Use for runtime data hashing only.
+ *
+ * @note The output is NOT an MD5 digest shares has the same basic
+ *       cryptographic properties.  Collisions with proper MD5 on the same
+ *       or other input data is equally unlikely as any MD5 collision.
+ */
+void svn__pseudo_md5_31(apr_uint32_t digest[4],
+                        const apr_uint32_t x[8]);
+
+/**
+ * Calculates a hash sum for 63 bytes in @a x and returns it in @a digest.
+ * The most significant byte in @a x must be 0 (independent of being on a
+ * little or big endian machine).
+ *
+ * @note Use for runtime data hashing only.
+ *
+ * @note The output is NOT an MD5 digest shares has the same basic
+ *       cryptographic properties.  Collisions with proper MD5 on the same
+ *       or other input data is equally unlikely as any MD5 collision.
+ */
+void svn__pseudo_md5_63(apr_uint32_t digest[4],
+                        const apr_uint32_t x[16]);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* SVN_PSEUDO_MD5_H */