Update to 7-Zip 17.01 Beta from Igor Pavlov

- Minor speed optimization for LZMA2 (xz and 7z) multi-threading compression.
  7-Zip now uses additional memory buffers for multi-block LZMA2 compression.
  CPU utilization was slightly improved.
- 7-zip now creates multi-block xz archives by default. Block size can be
  specified with -ms[Size]{m|g} switch.
- xz decoder now can unpack random block from multi-block xz archives.  7-Zip
  File Manager now can open nested multi-block xz archives (for example,
  image.iso.xz) without full unpacking of xz archive.
- 7-Zip now can create zip archives from stdin to stdout.
- 7-Zip command line: @listfile now doesn't work after -- switch.  Use
  -i@listfile before -- switch instead.

fixed bugs:
- 7-Zip could add unrequired alternate file streams to WIM archives, for
  commands that contain filename wildcards and -sns switch.
- 7-Zip 17.00 beta crashed for commands that write anti-item to 7z archive.
- 7-Zip 17.00 beta ignored "Use large memory pages" option.

C/Lzma2Enc.h

@@ -1,5 +1,5 @@
 /* Lzma2Enc.h -- LZMA2 Encoder
-2017-04-03 : Igor Pavlov : Public domain */
+2017-07-27 : Igor Pavlov : Public domain */
 
 #ifndef __LZMA2_ENC_H
 #define __LZMA2_ENC_H
@@ -8,11 +8,15 @@
 
 EXTERN_C_BEGIN
 
+#define LZMA2_ENC_PROPS__BLOCK_SIZE__AUTO 0
+#define LZMA2_ENC_PROPS__BLOCK_SIZE__SOLID ((UInt64)(Int64)-1)
+
 typedef struct
 {
   CLzmaEncProps lzmaProps;
-  size_t blockSize;
-  int numBlockThreads;
+  UInt64 blockSize;
+  int numBlockThreads_Reduced;
+  int numBlockThreads_Max;
   int numTotalThreads;
 } CLzma2EncProps;
 
@@ -22,13 +26,14 @@ void Lzma2EncProps_Normalize(CLzma2EncProps *p);
 /* ---------- CLzmaEnc2Handle Interface ---------- */
 
 /* Lzma2Enc_* functions can return the following exit codes:
-Returns:
+SRes:
   SZ_OK           - OK
   SZ_ERROR_MEM    - Memory allocation error
   SZ_ERROR_PARAM  - Incorrect paramater in props
-  SZ_ERROR_WRITE  - Write callback error
+  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 - errors in multithreading functions (only for Mt version)
+  SZ_ERROR_THREAD - error in multithreading functions (only for Mt version)
 */
 
 typedef void * CLzma2EncHandle;
@@ -36,26 +41,14 @@ typedef void * CLzma2EncHandle;
 CLzma2EncHandle Lzma2Enc_Create(ISzAllocPtr alloc, ISzAllocPtr allocBig);
 void Lzma2Enc_Destroy(CLzma2EncHandle p);
 SRes Lzma2Enc_SetProps(CLzma2EncHandle p, const CLzma2EncProps *props);
+void Lzma2Enc_SetDataSize(CLzma2EncHandle p, UInt64 expectedDataSiize);
 Byte Lzma2Enc_WriteProperties(CLzma2EncHandle p);
-SRes Lzma2Enc_Encode(CLzma2EncHandle p,
-    ISeqOutStream *outStream, ISeqInStream *inStream, ICompressProgress *progress);
-
-/* ---------- One Call Interface ---------- */
-
-/* Lzma2Encode
-Return code:
-  SZ_OK               - OK
-  SZ_ERROR_MEM        - Memory allocation error
-  SZ_ERROR_PARAM      - Incorrect paramater
-  SZ_ERROR_OUTPUT_EOF - output buffer overflow
-  SZ_ERROR_THREAD     - errors in multithreading functions (only for Mt version)
-*/
-
-/*
-SRes Lzma2Encode(Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
-    const CLzmaEncProps *props, Byte *propsEncoded, int writeEndMark,
-    ICompressProgress *progress, ISzAllocPtr alloc, ISzAllocPtr allocBig);
-*/
+SRes Lzma2Enc_Encode2(CLzma2EncHandle p,
+    ISeqOutStream *outStream,
+    Byte *outBuf, size_t *outBufSize,
+    ISeqInStream *inStream,
+    const Byte *inData, size_t inDataSize,
+    ICompressProgress *progress);
 
 EXTERN_C_END