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23.01

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This commit is contained in:
Igor Pavlov
2023-12-22 17:17:05 +00:00
committed by Kornel
parent ec44a8a070
commit a36c48cece
954 changed files with 42199 additions and 25482 deletions
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43
DOC/lzma.txt
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@@ -1,6 +1,6 @@
LZMA compression
----------------
Version: 9.35
Version: 23.01
This file describes LZMA encoding and decoding functions written in C language.
@@ -169,12 +169,14 @@ How To compress data
Compile files:
7zTypes.h
Threads.h
Threads.c
LzmaEnc.h
LzmaEnc.c
LzFind.h
LzFind.c
LzFindMt.h
LzFindMt.c
LzFindOpt.c
LzHash.h
Memory Requirements:
@@ -283,17 +285,26 @@ Return code:
Defines
-------
_LZMA_SIZE_OPT - Enable some optimizations in LZMA Decoder to get smaller executable code.
Z7_LZMA_SIZE_OPT - Enable some code size optimizations in LZMA Decoder to get smaller executable code.
_LZMA_PROB32 - It can increase the speed on some 32-bit CPUs, but memory usage for
some structures will be doubled in that case.
Z7_LZMA_PROB32 - It can increase the speed on some 32-bit CPUs, but memory usage for
some structures will be doubled in that case.
_LZMA_UINT32_IS_ULONG - Define it if int is 16-bit on your compiler and long is 32-bit.
Z7_DECL_Int32_AS_long - Define it if int is 16-bit on your compiler and long is 32-bit.
_LZMA_NO_SYSTEM_SIZE_T - Define it if you don't want to use size_t type.
Z7_DECL_SizeT_AS_unsigned_int - Define it if you don't want to use size_t type.
_7ZIP_PPMD_SUPPPORT - Define it if you don't want to support PPMD method in AMSI-C .7z decoder.
Defines for 7z decoder written in C
-----------------------------------
These defines are for 7zDec.c only (the decoder in C).
C++ 7z decoder doesn't uses these macros.
Z7_PPMD_SUPPORT - define it if you need PPMD method support.
Z7_NO_METHODS_FILTERS - do not use filters (except of BCJ2 filter).
Z7_USE_NATIVE_BRANCH_FILTER - use filter for native ISA:
use x86 filter, if compiled to x86 executable,
use arm64 filter, if compiled to arm64 executable.
C++ LZMA Encoder/Decoder
@@ -305,20 +316,26 @@ C++ LZMA code is just wrapper over ANSI-C code.
C++ Notes
~~~~~~~~~~~~~~~~~~~~~~~~
If you use some C++ code folders in 7-Zip (for example, C++ code for .7z handling),
If you use some C++ code folders in 7-Zip (for example, C++ code for 7z archive handling),
you must check that you correctly work with "new" operator.
7-Zip can be compiled with MSVC 6.0 that doesn't throw "exception" from "new" operator.
So 7-Zip uses "CPP\Common\NewHandler.cpp" that redefines "new" operator:
So 7-Zip uses "CPP\Common\NewHandler.cpp" that redefines "new" operator,
if compiled by old MSVC compilers (MSVC before version VS 2010):
operator new(size_t size)
{
void *p = ::malloc(size);
if (p == 0)
if (!p)
throw CNewException();
return p;
}
If you use MSCV that throws exception for "new" operator, you can compile without
"NewHandler.cpp". So standard exception will be used. Actually some code of
7-Zip catches any exception in internal code and converts it to HRESULT code.
If the compiler is VS 2010 or newer, NewHandler.cpp doesn't redefine "new" operator.
Sp if you use new compiler (VS 2010 or newer), you still can include "NewHandler.cpp"
to compilation, and it will not redefine operator new.
Also you can compile without "NewHandler.cpp" with new compilers.
If 7-zip doesn't redefine operator "new", standard exception will be used instead of CNewException.
Some code of 7-Zip catches any exception in internal code and converts it to HRESULT code.
So you don't need to catch CNewException, if you call COM interfaces of 7-Zip.
---