1 files changed, 86 insertions, 0 deletions
diff --git a/src/core/lib/compression/compression_internal.h b/src/core/lib/compression/compression_internal.h
new file mode 100644
index 0000000000..72f01dd1b7
--- /dev/null
+++ b/src/core/lib/compression/compression_internal.h
@@ -0,0 +1,86 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed 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.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_COMPRESSION_COMPRESSION_INTERNAL_H
+#define GRPC_CORE_LIB_COMPRESSION_COMPRESSION_INTERNAL_H
+
+#include <grpc/impl/codegen/compression_types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+  GRPC_MESSAGE_COMPRESS_NONE = 0,
+  GRPC_MESSAGE_COMPRESS_DEFLATE,
+  GRPC_MESSAGE_COMPRESS_GZIP,
+  /* TODO(ctiller): snappy */
+  GRPC_MESSAGE_COMPRESS_ALGORITHMS_COUNT
+} grpc_message_compression_algorithm;
+
+/** Stream compresssion algorithms supported by gRPC */
+typedef enum {
+  GRPC_STREAM_COMPRESS_NONE = 0,
+  GRPC_STREAM_COMPRESS_GZIP,
+  GRPC_STREAM_COMPRESS_ALGORITHMS_COUNT
+} grpc_stream_compression_algorithm;
+
+/* Interfaces performing transformation between compression algorithms and
+ * levels. */
+
+grpc_message_compression_algorithm
+grpc_compression_algorithm_to_message_compression_algorithm(
+    grpc_compression_algorithm algo);
+
+grpc_stream_compression_algorithm
+grpc_compression_algorithm_to_stream_compression_algorithm(
+    grpc_compression_algorithm algo);
+
+uint32_t grpc_compression_bitset_to_message_bitset(uint32_t bitset);
+
+uint32_t grpc_compression_bitset_to_stream_bitset(uint32_t bitset);
+
+uint32_t grpc_compression_bitset_from_message_stream_compression_bitset(
+    uint32_t message_bitset, uint32_t stream_bitset);
+
+int grpc_compression_algorithm_from_message_stream_compression_algorithm(
+    grpc_compression_algorithm* algorithm,
+    grpc_message_compression_algorithm message_algorithm,
+    grpc_stream_compression_algorithm stream_algorithm);
+
+/* Interfaces for message compression. */
+
+int grpc_message_compression_algorithm_name(
+    grpc_message_compression_algorithm algorithm, const char** name);
+
+grpc_message_compression_algorithm grpc_message_compression_algorithm_for_level(
+    grpc_compression_level level, uint32_t accepted_encodings);
+
+int grpc_message_compression_algorithm_parse(
+    grpc_slice value, grpc_message_compression_algorithm* algorithm);
+
+/* Interfaces for stream compression. */
+
+int grpc_stream_compression_algorithm_parse(
+    grpc_slice value, grpc_stream_compression_algorithm* algorithm);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_CORE_LIB_COMPRESSION_COMPRESSION_INTERNAL_H */