diff options
Diffstat (limited to 'DOC/7zC.txt')
| -rwxr-xr-x | DOC/7zC.txt | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/DOC/7zC.txt b/DOC/7zC.txt index 88f039c5..84129547 100755 --- a/DOC/7zC.txt +++ b/DOC/7zC.txt @@ -1,7 +1,7 @@ -7z ANSI-C Decoder 4.43 +7z ANSI-C Decoder 4.48 ---------------------- -7z ANSI-C Decoder 4.43 Copyright (C) 1999-2006 Igor Pavlov +7z ANSI-C Decoder 4.48 Copyright (C) 1999-2006 Igor Pavlov 7z ANSI-C provides 7z/LZMA decoding. 7z ANSI-C version is simplified version ported from C++ code. @@ -40,12 +40,12 @@ You must download 7-Zip program from www.7-zip.org. You can create .7z archive with 7z.exe or 7za.exe: - 7za.exe a archive.7z *.htm -r -mx -m0fb=255 -mf=off + 7za.exe a archive.7z *.htm -r -mx -m0fb=255 If you have big number of files in archive, and you need fast extracting, you can use partly-solid archives: - 7za.exe a archive.7z *.htm -ms=512K -r -mx -m0fb=255 -m0d=512K -mf=off + 7za.exe a archive.7z *.htm -ms=512K -r -mx -m0fb=255 -m0d=512K In that example 7-Zip will use 512KB solid blocks. So it needs to decompress only 512KB for extracting one file from such archive. @@ -54,8 +54,8 @@ In that example 7-Zip will use 512KB solid blocks. So it needs to decompress onl Limitations of current version of 7z ANSI-C Decoder --------------------------------------------------- - - It reads only "FileName", "Size", and "CRC" information for each file in archive. - - It supports only LZMA and Copy (no compression) methods. + - It reads only "FileName", "Size", "LastWriteTime" and "CRC" information for each file in archive. + - It supports only LZMA and Copy (no compression) methods with BCJ or BCJ2 filters. - It converts original UTF-16 Unicode file names to UTF-8 Unicode file names. These limitations will be fixed in future versions. @@ -181,6 +181,7 @@ Memory usage for Archive opening: Estimated size of one file structures in solid archive: - Size (4 or 8 Bytes) - CRC32 (4 bytes) + - LastWriteTime (8 bytes) - Some file information (4 bytes) - File Name (variable length) + pointer + allocation structures @@ -190,6 +191,8 @@ Memory usage for archive Decompressing: - Memory for LZMA decompressing structures - Main pool: - Memory for decompressed solid block + - Memory for temprorary buffers, if BCJ2 fileter is used. Usually these + temprorary buffers can be about 15% of solid block size. If _LZMA_IN_CB is defined, 7z Decoder will not allocate memory for @@ -220,12 +223,11 @@ LZMA Defines _LZMA_IN_CB - Use special callback mode for input stream to reduce memory requirements -_SZ_FILE_SIZE_64 - define it if you need support for files larger than 4 GB -_SZ_NO_INT_64 - define it if your compiler doesn't support long long int +_SZ_FILE_SIZE_32 - define it if you need only support for files smaller than 4 GB +_SZ_NO_INT_64 - define it if your compiler doesn't support long long int or __int64. _LZMA_PROB32 - it can increase LZMA decompressing speed on some 32-bit CPUs. -_SZ_ONE_DIRECTORY - define it if you want to locate all source files to one directory _SZ_ALLOC_DEBUG - define it if you want to debug alloc/free operations to stderr. |