Share LZMS x86 filter between compressor and decompressor

[wimlib] / include / wimlib / lzms.h

diff --git a/include/wimlib/lzms.h b/include/wimlib/lzms.h
index 5584b9a4ceb5a27fae756133678743c0a3ae40cc..a18c526e5dea05f25c2cf4c825de27c4d47b2d27 100644 (file)
--- a/include/wimlib/lzms.h
+++ b/include/wimlib/lzms.h
@@ -1,8 +1,53 @@
 #ifndef _WIMLIB_LZMS_H
 #define _WIMLIB_LZMS_H
 
-int
-lzms_decompress(const void *cdata, unsigned clen, void *udata, unsigned unlen,
-               unsigned window_size);
+/* Constants for the LZMS data compression format.  See the comments in
+ * lzms-decompress.c for more information about this format.  */
 
+//#define ENABLE_LZMS_DEBUG
+#ifdef ENABLE_LZMS_DEBUG
+#      define LZMS_DEBUG DEBUG
+#       define LZMS_ASSERT wimlib_assert
+#else
+#      define LZMS_DEBUG(format, ...)
+#      define LZMS_ASSERT(...)
 #endif
+
+#define LZMS_NUM_RECENT_OFFSETS                        3
+
+#define LZMS_PROBABILITY_BITS                  6
+#define LZMS_PROBABILITY_MAX                   (1U << LZMS_PROBABILITY_BITS)
+#define LZMS_INITIAL_PROBABILITY               48
+#define LZMS_INITIAL_RECENT_BITS               0x0000000055555555ULL
+
+#define LZMS_NUM_MAIN_STATES                   16
+#define LZMS_NUM_MATCH_STATES                  32
+#define LZMS_NUM_LZ_MATCH_STATES               64
+#define LZMS_NUM_LZ_REPEAT_MATCH_STATES                64
+#define LZMS_NUM_DELTA_MATCH_STATES            64
+#define LZMS_NUM_DELTA_REPEAT_MATCH_STATES     64
+#define LZMS_MAX_NUM_STATES                    64
+
+#define LZMS_NUM_LITERAL_SYMS                  256
+#define LZMS_NUM_LEN_SYMS                      54
+#define LZMS_NUM_DELTA_POWER_SYMS              8
+#define LZMS_MAX_NUM_OFFSET_SYMS               799
+#define LZMS_MAX_NUM_SYMS                      799
+
+#define LZMS_MAX_CODEWORD_LEN                  15
+
+#define LZMS_LITERAL_CODE_REBUILD_FREQ         1024
+#define LZMS_LZ_OFFSET_CODE_REBUILD_FREQ       1024
+#define LZMS_LENGTH_CODE_REBUILD_FREQ          512
+#define LZMS_DELTA_OFFSET_CODE_REBUILD_FREQ    1024
+#define LZMS_DELTA_POWER_CODE_REBUILD_FREQ     512
+
+#define LZMS_X86_MAX_GOOD_TARGET_OFFSET                65535
+#define LZMS_X86_MAX_TRANSLATION_OFFSET                1023
+
+#include <wimlib/types.h>
+
+extern void
+lzms_x86_filter(u8 data[], s32 size, s32 last_target_usages[], bool undo);
+
+#endif /* _WIMLIB_LZMS_H  */