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From j...@apache.org
Subject incubator-corinthia git commit: Added description of how zip is used
Date Sat, 15 Aug 2015 08:45:38 GMT
Repository: incubator-corinthia
Updated Branches:
  refs/heads/master b8f3d21d0 -> 15b721632


Added description of how zip is used


Project: http://git-wip-us.apache.org/repos/asf/incubator-corinthia/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-corinthia/commit/15b72163
Tree: http://git-wip-us.apache.org/repos/asf/incubator-corinthia/tree/15b72163
Diff: http://git-wip-us.apache.org/repos/asf/incubator-corinthia/diff/15b72163

Branch: refs/heads/master
Commit: 15b721632c495a0b9c93d35985e9b8c7bf5ece47
Parents: b8f3d21
Author: jani <jani@apache.org>
Authored: Sat Aug 15 10:45:10 2015 +0200
Committer: jani <jani@apache.org>
Committed: Sat Aug 15 10:45:10 2015 +0200

----------------------------------------------------------------------
 DocFormats/platform/src/README.txt | 232 ++++++++++++++++++++++++++++++++
 1 file changed, 232 insertions(+)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/incubator-corinthia/blob/15b72163/DocFormats/platform/src/README.txt
----------------------------------------------------------------------
diff --git a/DocFormats/platform/src/README.txt b/DocFormats/platform/src/README.txt
new file mode 100644
index 0000000..4b0839c
--- /dev/null
+++ b/DocFormats/platform/src/README.txt
@@ -0,0 +1,232 @@
+***** Field description *****
+
+Reference: https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT
+
+
+"version made by" (2 bytes)
+    Fixed set to 0x2D
+
+    Upper byte mapping:
+         0 - MS-DOS and OS/2 (FAT / VFAT / FAT32 file systems)
+         1 - Amiga                     2 - OpenVMS
+         3 - UNIX                      4 - VM/CMS
+         5 - Atari ST                  6 - OS/2 H.P.F.S.
+         7 - Macintosh                 8 - Z-System
+         9 - CP/M                     10 - Windows NTFS
+        11 - MVS (OS/390 - Z/OS)      12 - VSE
+        13 - Acorn Risc               14 - VFAT
+        15 - alternate MVS            16 - BeOS
+        17 - Tandem                   18 - OS/400
+        19 - OS X (Darwin)            20 thru 255 - unused
+
+    Lower byte indicates the ZIP specification version 
+
+ "Version needed to extract" (2 bytes)
+
+    Fixed set to 0x14
+
+    The minimum supported ZIP specification version needed 
+    to extract the file, mapped as above.
+
+    Current minimum feature versions are as defined below:
+        1.0 - Default value
+        1.1 - File is a volume label
+        2.0 - File is a folder (directory)
+        2.0 - File is compressed using Deflate compression
+        2.0 - File is encrypted using traditional PKWARE encryption
+        2.1 - File is compressed using Deflate64(tm)
+        2.5 - File is compressed using PKWARE DCL Implode 
+        2.7 - File is a patch data set 
+        4.5 - File uses ZIP64 format extensions
+        4.6 - File is compressed using BZIP2 compression*
+        5.0 - File is encrypted using DES
+        5.0 - File is encrypted using 3DES
+        5.0 - File is encrypted using original RC2 encryption
+        5.0 - File is encrypted using RC4 encryption
+        5.1 - File is encrypted using AES encryption
+        5.1 - File is encrypted using corrected RC2 encryption**
+        5.2 - File is encrypted using corrected RC2-64 encryption**
+        6.1 - File is encrypted using non-OAEP key wrapping***
+        6.2 - Central directory encryption
+        6.3 - File is compressed using LZMA
+        6.3 - File is compressed using PPMd+
+        6.3 - File is encrypted using Blowfish
+        6.3 - File is encrypted using Twofish
+
+"general purpose bit flag" (2 bytes)
+
+   Fixed set to 0x06
+
+
+   Bit 0: If set, indicates that the file is encrypted.
+
+   Bit 2 / 1 (For Methods 8 and 9 - Deflating)
+       0 / 0  Normal compression option was used.
+       0 / 1  Maximum compression option was used.
+       1 / 0  Fast compression option was used.
+       1 / 1  Super Fast compression option was used.
+
+   Bit 3: fields crc-32, compressed size and uncompressed size are zero
+          in the local header.
+
+   Bit 4: enhanced deflating. 
+
+   Bit 5: compressed patched data.
+
+   Bit 6: Strong encryption.
+
+   Bit 7 / 8 / 9 / 10: Currently unused.
+
+   Bit 11: Language encoding flag (using UTF-8).
+
+   Bit 12: enhanced compression.
+
+   Bit 13: encrypting the Central Directory to indicate 
+           selected data values in the Local Header are masked to
+            hide their actual values.
+
+   Bit 14 / 15 / 16: Reserved by PKWARE.
+
+
+"compression method"
+   Fixed set to 0x08
+
+    0 - The file is stored (no compression)
+    1 - The file is Shrunk
+    2 - The file is Reduced with compression factor 1
+    3 - The file is Reduced with compression factor 2
+    4 - The file is Reduced with compression factor 3
+    5 - The file is Reduced with compression factor 4
+    6 - The file is Imploded
+    7 - Reserved for Tokenizing compression algorithm
+    8 - The file is Deflated
+    9 - Enhanced Deflating using Deflate64(tm)
+   10 - PKWARE Data Compression Library Imploding (old IBM TERSE)
+   11 - Reserved by PKWARE
+   12 - File is compressed using BZIP2 algorithm
+   13 - Reserved by PKWARE
+   14 - LZMA (EFS)
+   15 - Reserved by PKWARE
+   16 - Reserved by PKWARE
+   17 - Reserved by PKWARE
+   18 - File is compressed using IBM TERSE (new)
+   19 - IBM LZ77 z Architecture (PFS)
+   97 - WavPack compressed data
+   98 - PPMd version I, Rev 1
+
+
+"date and time fields": (2 bytes each)
+   Fixed set to 0x0000
+
+   The date and time are encoded in standard MS-DOS format.
+
+"CRC-32": (4 bytes)
+    Calculated
+
+
+"compressed size": (4 bytes)
+    data buffer size
+
+
+"uncompressed size": (4 bytes)
+    Calculated
+
+
+"file name length": (2 bytes)
+    Calculated
+
+
+"extra field length": (2 bytes)
+    Fixed set to 0x0000
+
+
+"file comment length": (2 bytes)
+    Fixed set to 0x0000
+
+
+"disk number start": (2 bytes)
+    Fixed set to 0x0000
+
+
+"internal file attributes": (2 bytes)
+    Fixed set to 0x0000
+
+    Bit 0 file is apparently an ASCII or text file.
+
+    Bits 1 are reserved for use by PKWARE.
+
+    Bits 2 a 4 byte variable record length control field precedes each 
+        logical record indicating the length of the record.
+
+
+"external file attributes": (4 bytes)
+    Fixed set to 0x0000
+
+    the low order byte is the MS-DOS directory attribute byte.
+
+
+"relative offset of local header": (4 bytes)
+    Calculated
+
+    This is the offset from the start of the first disk on
+    which this file appears, to where the local header should
+    be found.
+
+
+"file name": (Variable)
+    Copied
+
+    Name of the file, with optional relative path.
+    All slashes MUST be forward slashes '/'
+
+
+"file comment": (Variable)
+    Not used
+
+
+"number of this disk": (2 bytes)
+    Fixed set to 0x0000
+
+
+"number of the disk with the start of the central directory": (2 bytes)
+    Fixed set to 0x0000
+
+
+"total number of entries in the central dir": (2 bytes)
+    Calculated
+
+    The number of central directory entries on this disk.
+
+
+"size of the central directory": (4 bytes)
+    Calculated
+
+    The size (in bytes) of the entire central directory.
+
+
+"offset of start of central directory" (4 bytes)
+    Calculated
+
+    Offset of the start of the central directory in the file
+
+
+".ZIP file comment length": (2 bytes)
+    Calculated
+    
+
+    The length of the comment for this .ZIP file.
+
+".ZIP file comment": (Variable)
+    Set fix to "Created by Corinthia"
+
+    The comment for this .ZIP file.
+
+
+"zip64 extensible data sector" (variable size)
+    Not used
+
+
+"extra field": (Variable)
+    Not used
+
+


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