1/*  LzmaEnc.h -- LZMA Encoder
 22017-07-27 : Igor Pavlov : Public domain */
 3
 4#ifndef __LZMA_ENC_H
 5#define __LZMA_ENC_H
 6
 7#include "7zTypes.h"
 8
 9EXTERN_C_BEGIN
10
11#define LZMA_PROPS_SIZE 5
12
13typedef struct _CLzmaEncProps
14{
15  int level;       /* 0 <= level <= 9 */
16  UInt32 dictSize; /* (1 << 12) <= dictSize <= (1 << 27) for 32-bit version
17                      (1 << 12) <= dictSize <= (3 << 29) for 64-bit version
18                      default = (1 << 24) */
19  int lc;          /* 0 <= lc <= 8, default = 3 */
20  int lp;          /* 0 <= lp <= 4, default = 0 */
21  int pb;          /* 0 <= pb <= 4, default = 2 */
22  int algo;        /* 0 - fast, 1 - normal, default = 1 */
23  int fb;          /* 5 <= fb <= 273, default = 32 */
24  int btMode;      /* 0 - hashChain Mode, 1 - binTree mode - normal, default = 1 */
25  int numHashBytes; /* 2, 3 or 4, default = 4 */
26  UInt32 mc;       /* 1 <= mc <= (1 << 30), default = 32 */
27  unsigned writeEndMark;  /* 0 - do not write EOPM, 1 - write EOPM, default = 0 */
28  int numThreads;  /* 1 or 2, default = 2 */
29
30  UInt64 reduceSize; /* estimated size of data that will be compressed. default = (UInt64)(Int64)-1.
31                        Encoder uses this value to reduce dictionary size */
32} CLzmaEncProps;
33
34void LzmaEncProps_Init(CLzmaEncProps *p);
35void LzmaEncProps_Normalize(CLzmaEncProps *p);
36UInt32 LzmaEncProps_GetDictSize(const CLzmaEncProps *props2);
37
38
39/* ---------- CLzmaEncHandle Interface ---------- */
40
41/* LzmaEnc* functions can return the following exit codes:
42SRes:
43  SZ_OK           - OK
44  SZ_ERROR_MEM    - Memory allocation error
45  SZ_ERROR_PARAM  - Incorrect paramater in props
46  SZ_ERROR_WRITE  - ISeqOutStream write callback error
47  SZ_ERROR_OUTPUT_EOF - output buffer overflow - version with (Byte *) output
48  SZ_ERROR_PROGRESS - some break from progress callback
49  SZ_ERROR_THREAD - error in multithreading functions (only for Mt version)
50*/
51
52typedef void * CLzmaEncHandle;
53
54CLzmaEncHandle LzmaEnc_Create(ISzAllocPtr alloc);
55void LzmaEnc_Destroy(CLzmaEncHandle p, ISzAllocPtr alloc, ISzAllocPtr allocBig);
56
57SRes LzmaEnc_SetProps(CLzmaEncHandle p, const CLzmaEncProps *props);
58void LzmaEnc_SetDataSize(CLzmaEncHandle p, UInt64 expectedDataSiize);
59SRes LzmaEnc_WriteProperties(CLzmaEncHandle p, Byte *properties, SizeT *size);
60unsigned LzmaEnc_IsWriteEndMark(CLzmaEncHandle p);
61
62SRes LzmaEnc_Encode(CLzmaEncHandle p, ISeqOutStream *outStream, ISeqInStream *inStream,
63    ICompressProgress *progress, ISzAllocPtr alloc, ISzAllocPtr allocBig);
64SRes LzmaEnc_MemEncode(CLzmaEncHandle p, Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
65    int writeEndMark, ICompressProgress *progress, ISzAllocPtr alloc, ISzAllocPtr allocBig);
66
67
68/* ---------- One Call Interface ---------- */
69
70SRes LzmaEncode(Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
71    const CLzmaEncProps *props, Byte *propsEncoded, SizeT *propsSize, int writeEndMark,
72    ICompressProgress *progress, ISzAllocPtr alloc, ISzAllocPtr allocBig);
73
74EXTERN_C_END
75
76#endif