Add Fast LZMA2 codec

C/fast-lzma2/lzma2_enc.h

@@ -0,0 +1,64 @@
+/* lzma2_enc.h -- LZMA2 Encoder
+Based on LzmaEnc.h and Lzma2Enc.h : Igor Pavlov
+Modified for FL2 by Conor McCarthy
+Public domain
+*/
+
+#ifndef RADYX_LZMA2_ENCODER_H
+#define RADYX_LZMA2_ENCODER_H
+
+#include "mem.h"
+#include "data_block.h"
+#include "radix_mf.h"
+
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+#define kFastDistBits 12U
+
+#define LZMA2_END_MARKER '\0'
+#define LZMA_MIN_DICT_BITS 12
+
+typedef struct FL2_lzmaEncoderCtx_s FL2_lzmaEncoderCtx;
+
+typedef enum {
+    FL2_fast,
+    FL2_opt,
+    FL2_ultra
+} FL2_strategy;
+
+typedef struct
+{
+    unsigned lc;
+    unsigned lp;
+    unsigned pb;
+    unsigned fast_length;
+    unsigned match_cycles;
+    FL2_strategy strategy;
+    unsigned second_dict_bits;
+    unsigned random_filter;
+} FL2_lzma2Parameters;
+
+
+FL2_lzmaEncoderCtx* FL2_lzma2Create();
+
+void FL2_lzma2Free(FL2_lzmaEncoderCtx* enc);
+
+int FL2_lzma2HashAlloc(FL2_lzmaEncoderCtx* enc, const FL2_lzma2Parameters* options);
+
+size_t FL2_lzma2Encode(FL2_lzmaEncoderCtx* enc,
+    FL2_matchTable* tbl,
+    const FL2_dataBlock block,
+    const FL2_lzma2Parameters* options,
+    FL2_progressFn progress, void* opaque, size_t base, U32 weight);
+
+BYTE FL2_getDictSizeProp(size_t dictionary_size);
+
+size_t FL2_lzma2MemoryUsage(unsigned chain_log, FL2_strategy strategy, unsigned thread_count);
+
+#if defined (__cplusplus)
+}
+#endif
+
+#endif /* RADYX_LZMA2_ENCODER_H */