LzmaEnc.h

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/*  LzmaEnc.h -- LZMA Encoder
2023-04-13 : Igor Pavlov : Public domain */
 
#ifndef ZIP7_INC_LZMA_ENC_H
#define ZIP7_INC_LZMA_ENC_H
 
#include "7zTypes.h"
 
EXTERN_C_BEGIN
 
#define LZMA_PROPS_SIZE 5
 
typedef struct
{
  int level;       /* 0 <= level <= 9 */
  UInt32 dictSize; /* (1 << 12) <= dictSize <= (1 << 27) for 32-bit version
                      (1 << 12) <= dictSize <= (3 << 29) for 64-bit version
                      default = (1 << 24) */
  int lc;          /* 0 <= lc <= 8, default = 3 */
  int lp;          /* 0 <= lp <= 4, default = 0 */
  int pb;          /* 0 <= pb <= 4, default = 2 */
  int algo;        /* 0 - fast, 1 - normal, default = 1 */
  int fb;          /* 5 <= fb <= 273, default = 32 */
  int btMode;      /* 0 - hashChain Mode, 1 - binTree mode - normal, default = 1 */
  int numHashBytes; /* 2, 3 or 4, default = 4 */
  unsigned numHashOutBits;  /* default = ? */
  UInt32 mc;       /* 1 <= mc <= (1 << 30), default = 32 */
  unsigned writeEndMark;  /* 0 - do not write EOPM, 1 - write EOPM, default = 0 */
  int numThreads;  /* 1 or 2, default = 2 */
 
  // int _pad;
 
  UInt64 reduceSize; /* estimated size of data that will be compressed. default = (UInt64)(Int64)-1.
                        Encoder uses this value to reduce dictionary size */
 
  UInt64 affinity;
} CLzmaEncProps;
 
void LzmaEncProps_Init(CLzmaEncProps *p);
void LzmaEncProps_Normalize(CLzmaEncProps *p);
UInt32 LzmaEncProps_GetDictSize(const CLzmaEncProps *props2);
 
 
/* ---------- CLzmaEncHandle Interface ---------- */
 
/* LzmaEnc* functions can return the following exit codes:
SRes:
  SZ_OK           - OK
  SZ_ERROR_MEM    - Memory allocation error
  SZ_ERROR_PARAM  - Incorrect paramater in props
  SZ_ERROR_WRITE  - ISeqOutStream write callback error
  SZ_ERROR_OUTPUT_EOF - output buffer overflow - version with (Byte *) output
  SZ_ERROR_PROGRESS - some break from progress callback
  SZ_ERROR_THREAD - error in multithreading functions (only for Mt version)
*/
 
typedef struct CLzmaEnc CLzmaEnc;
typedef CLzmaEnc * CLzmaEncHandle;
// Z7_DECLARE_HANDLE(CLzmaEncHandle)
 
CLzmaEncHandle LzmaEnc_Create(ISzAllocPtr alloc);
void LzmaEnc_Destroy(CLzmaEncHandle p, ISzAllocPtr alloc, ISzAllocPtr allocBig);
 
SRes LzmaEnc_SetProps(CLzmaEncHandle p, const CLzmaEncProps *props);
void LzmaEnc_SetDataSize(CLzmaEncHandle p, UInt64 expectedDataSiize);
SRes LzmaEnc_WriteProperties(CLzmaEncHandle p, Byte *properties, SizeT *size);
unsigned LzmaEnc_IsWriteEndMark(CLzmaEncHandle p);
 
SRes LzmaEnc_Encode(CLzmaEncHandle p, ISeqOutStreamPtr outStream, ISeqInStreamPtr inStream,
    ICompressProgressPtr progress, ISzAllocPtr alloc, ISzAllocPtr allocBig);
SRes LzmaEnc_MemEncode(CLzmaEncHandle p, Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
    int writeEndMark, ICompressProgressPtr progress, ISzAllocPtr alloc, ISzAllocPtr allocBig);
 
 
/* ---------- One Call Interface ---------- */
 
SRes LzmaEncode(Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
    const CLzmaEncProps *props, Byte *propsEncoded, SizeT *propsSize, int writeEndMark,
    ICompressProgressPtr progress, ISzAllocPtr alloc, ISzAllocPtr allocBig);
 
EXTERN_C_END
 
#endif