| 1 | /* LzmaEnc.h -- LZMA Encoder |
| 2 | 2017-07-27 : Igor Pavlov : Public domain */ |
| 3 | |
| 4 | #ifndef __LZMA_ENC_H |
| 5 | #define __LZMA_ENC_H |
| 6 | |
| 7 | #include "7zTypes.h" |
| 8 | |
| 9 | EXTERN_C_BEGIN |
| 10 | |
| 11 | #define LZMA_PROPS_SIZE 5 |
| 12 | |
| 13 | typedef 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 | |
| 34 | void LzmaEncProps_Init(CLzmaEncProps *p); |
| 35 | void LzmaEncProps_Normalize(CLzmaEncProps *p); |
| 36 | UInt32 LzmaEncProps_GetDictSize(const CLzmaEncProps *props2); |
| 37 | |
| 38 | |
| 39 | /* ---------- CLzmaEncHandle Interface ---------- */ |
| 40 | |
| 41 | /* LzmaEnc* functions can return the following exit codes: |
| 42 | SRes: |
| 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 | |
| 52 | typedef void * CLzmaEncHandle; |
| 53 | |
| 54 | CLzmaEncHandle LzmaEnc_Create(ISzAllocPtr alloc); |
| 55 | void LzmaEnc_Destroy(CLzmaEncHandle p, ISzAllocPtr alloc, ISzAllocPtr allocBig); |
| 56 | |
| 57 | SRes LzmaEnc_SetProps(CLzmaEncHandle p, const CLzmaEncProps *props); |
| 58 | void LzmaEnc_SetDataSize(CLzmaEncHandle p, UInt64 expectedDataSiize); |
| 59 | SRes LzmaEnc_WriteProperties(CLzmaEncHandle p, Byte *properties, SizeT *size); |
| 60 | unsigned LzmaEnc_IsWriteEndMark(CLzmaEncHandle p); |
| 61 | |
| 62 | SRes LzmaEnc_Encode(CLzmaEncHandle p, ISeqOutStream *outStream, ISeqInStream *inStream, |
| 63 | ICompressProgress *progress, ISzAllocPtr alloc, ISzAllocPtr allocBig); |
| 64 | SRes 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 | |
| 70 | SRes 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 | |
| 74 | EXTERN_C_END |
| 75 | |
| 76 | #endif |