1 files changed, 117 insertions, 0 deletions

diff --git a/src/microspdy/compression.h b/src/microspdy/compression.h
new file mode 100644
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+++ b/src/microspdy/compression.h
@@ -0,0 +1,117 @@
+/*
+    This file is part of libmicrospdy
+    Copyright (C) 2012 Andrey Uzunov
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file compression.h
+ * @brief  zlib handling functions
+ * @author Andrey Uzunov
+ */
+
+#ifndef COMPRESSION_H
+#define COMPRESSION_H
+
+#include "platform.h"
+
+/* size of buffers used by zlib on (de)compressing */
+#define SPDYF_ZLIB_CHUNK 16384
+
+
+/**
+ * Initializes the zlib stream for compression. Must be called once
+ * for a session on initialization.
+ *
+ * @param strm Zlib stream on which we work
+ * @return SPDY_NO if zlib failed. SPDY_YES otherwise
+ */             
+int
+SPDYF_zlib_deflate_init(z_stream *strm);
+
+
+/**
+ * Deinitializes the zlib stream for compression. Should be called once
+ * for a session on cleaning up.
+ *
+ * @param strm Zlib stream on which we work
+ */     
+void
+SPDYF_zlib_deflate_end(z_stream *strm);
+
+
+/**
+ * Compressing stream with zlib.
+ *
+ * @param strm Zlib stream on which we work
+ * @param src stream of the data to be compressed
+ * @param src_size size of the data
+ * @param data_used the number of bytes from src_stream that were used
+ *                                      TODO do we need
+ * @param dest the resulting compressed stream. Should be NULL. Must be
+ *                                      freed later manually.
+ * @param dest_size size of the data after compression
+ * @return SPDY_NO if malloc or zlib failed. SPDY_YES otherwise
+ */
+int
+SPDYF_zlib_deflate(z_stream *strm,
+                                        const void *src,
+                                        size_t src_size,
+                                        size_t *data_used,
+                                        void **dest,
+                                        size_t *dest_size);
+     
+
+/**
+ * Initializes the zlib stream for decompression. Must be called once
+ * for a session.
+ *
+ * @param strm Zlib stream on which we work
+ * @return SPDY_NO if zlib failed. SPDY_YES otherwise
+ */                      
+int
+SPDYF_zlib_inflate_init(z_stream *strm);
+
+
+/**
+ * Deinitializes the zlib stream for decompression. Should be called once
+ * for a session on cleaning up.
+ *
+ * @param strm Zlib stream on which we work
+ */     
+void
+SPDYF_zlib_inflate_end(z_stream *strm);
+
+
+/**
+ * Decompressing stream with zlib.
+ *
+ * @param strm Zlib stream on which we work
+ * @param src stream of the data to be decompressed
+ * @param src_size size of the data
+ * @param dest the resulting decompressed stream. Should be NULL. Must
+ *                              be freed manually.
+ * @param dest_size size of the data after decompression
+ * @return SPDY_NO if malloc or zlib failed. SPDY_YES otherwise. If the
+ *                      function fails, the SPDY session must be closed
+ */
+int
+SPDYF_zlib_inflate(z_stream *strm,
+                                        const void *src,
+                                        size_t src_size,
+                                        void **dest,
+                                        size_t *dest_size);
+
+#endif