+/* license:BSD-3-Clause
+ * copyright-holders:Aaron Giles
+ ***************************************************************************
+
+ libchr_zlib.h
+
+ Zlib compression wrappers
+
+***************************************************************************/
+
+#pragma once
+
+#ifndef __LIBCHDR_ZLIB_H__
+#define __LIBCHDR_ZLIB_H__
+
+#include <stdint.h>
+
+#include <zlib.h>
+#include "coretypes.h"
+#include "chd.h"
+
+#define MAX_ZLIB_ALLOCS 64
+
+/* codec-private data for the ZLIB codec */
+
+typedef struct _zlib_allocator zlib_allocator;
+struct _zlib_allocator
+{
+ UINT32 * allocptr[MAX_ZLIB_ALLOCS];
+ UINT32 * allocptr2[MAX_ZLIB_ALLOCS];
+};
+
+typedef struct _zlib_codec_data zlib_codec_data;
+struct _zlib_codec_data
+{
+ z_stream inflater;
+ zlib_allocator allocator;
+};
+
+/* codec-private data for the CDZL codec */
+typedef struct _cdzl_codec_data cdzl_codec_data;
+struct _cdzl_codec_data {
+ /* internal state */
+ zlib_codec_data base_decompressor;
+#ifdef WANT_SUBCODE
+ zlib_codec_data subcode_decompressor;
+#endif
+ uint8_t* buffer;
+};
+
+/* zlib compression codec */
+chd_error zlib_codec_init(void *codec, uint32_t hunkbytes);
+
+void zlib_codec_free(void *codec);
+
+chd_error zlib_codec_decompress(void *codec, const uint8_t *src, uint32_t complen, uint8_t *dest, uint32_t destlen);
+
+voidpf zlib_fast_alloc(voidpf opaque, uInt items, uInt size);
+
+void zlib_fast_free(voidpf opaque, voidpf address);
+
+/* cdzl compression codec */
+chd_error cdzl_codec_init(void* codec, uint32_t hunkbytes);
+
+void cdzl_codec_free(void* codec);
+
+chd_error cdzl_codec_decompress(void *codec, const uint8_t *src, uint32_t complen, uint8_t *dest, uint32_t destlen);
+
+#endif /* __LIBCHDR_ZLIB_H__ */