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diff --git a/subversion/include/svn_base64.h b/subversion/include/svn_base64.h
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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_base64.h
+ * @brief Base64 encoding and decoding functions
+ */
+
+#ifndef SVN_BASE64_H
+#define SVN_BASE64_H
+
+#include <apr_pools.h>
+
+#include "svn_types.h"
+#include "svn_io.h"     /* for svn_stream_t */
+#include "svn_string.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ *
+ *
+ * @defgroup base64 Base64 encoding/decoding functions
+ *
+ * @{
+ */
+
+/** Return a writable generic stream which will encode binary data in
+ * base64 format and write the encoded data to @a output.  Be sure to
+ * close the stream when done writing in order to squeeze out the last
+ * bit of encoded data.  The stream is allocated in @a pool.
+ */
+svn_stream_t *
+svn_base64_encode(svn_stream_t *output,
+                  apr_pool_t *pool);
+
+/** Return a writable generic stream which will decode base64-encoded
+ * data and write the decoded data to @a output.  The stream is allocated
+ * in @a pool.
+ */
+svn_stream_t *
+svn_base64_decode(svn_stream_t *output,
+                  apr_pool_t *pool);
+
+
+/** Encode an @c svn_stringbuf_t into base64.
+ *
+ * A simple interface for encoding base64 data assuming we have all of
+ * it present at once.  If @a break_lines is true, newlines will be
+ * inserted periodically; otherwise the string will only consist of
+ * base64 encoding characters.  The returned string will be allocated
+ * from @a pool.
+ *
+ * @since New in 1.6.
+ */
+const svn_string_t *
+svn_base64_encode_string2(const svn_string_t *str,
+                          svn_boolean_t break_lines,
+                          apr_pool_t *pool);
+
+/**
+ * Same as svn_base64_encode_string2, but with @a break_lines always
+ * TRUE.
+ *
+ * @deprecated Provided for backward compatibility with the 1.5 API.
+ */
+SVN_DEPRECATED
+const svn_string_t *
+svn_base64_encode_string(const svn_string_t *str,
+                         apr_pool_t *pool);
+
+/** Decode an @c svn_stringbuf_t from base64.
+ *
+ * A simple interface for decoding base64 data assuming we have all of
+ * it present at once.  The returned string will be allocated from @c
+ * pool.
+ *
+ */
+const svn_string_t *
+svn_base64_decode_string(const svn_string_t *str,
+                         apr_pool_t *pool);
+
+
+/** Return a base64-encoded checksum for finalized @a digest.
+ *
+ * @a digest contains @c APR_MD5_DIGESTSIZE bytes of finalized data.
+ * Allocate the returned checksum in @a pool.
+ *
+ * @deprecated Provided for backward compatibility with the 1.5 API.
+ */
+SVN_DEPRECATED
+svn_stringbuf_t *
+svn_base64_from_md5(unsigned char digest[],
+                    apr_pool_t *pool);
+
+
+/** @} end group: Base64 encoding/decoding functions */
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* SVN_BASE64_H */