Keep only base/extractor.[cc|h].

third_party/lzma/v4_65/files/Methods.txt

-7-Zip method IDs (4.65)
------------------------
-
-Each compression or crypto method in 7z has unique binary value (ID).
-The length of ID in bytes is arbitrary but it can not exceed 63 bits (8 bytes).
-
-If you want to add some new ID, you have two ways:
-1) Write request for allocating IDs to 7-zip developers.
-2) Generate 8-bytes ID:
-
-    3F ZZ ZZ ZZ ZZ ZZ MM MM 
-
-    3F              - Prefix for random IDs (1 byte)
-    ZZ ZZ ZZ ZZ ZZ  - Developer ID (5 bytes). Use real random bytes. 
-                      
-    MM MM           - Method ID (2 bytes)
-
-    You can notify 7-Zip developers about your Developer ID / Method ID.
-
-    Note: Use new ID only if old codec can not decode data encoded with new version.
-
-
-List of defined IDs
--------------------
-      
-00 - Copy
-
-02 - Common
-   03 Swap
-      - 2 Swap2
-      - 4 Swap4
-
-03 - 7z
-   01 - LZMA
-      01 - Version
-  
-   03 - Branch
-      01 - x86
-         03  - BCJ
-         1B  - BCJ2
-      02 - PPC
-         05 - PPC (Big Endian)
-      03 - Alpha
-         01 - Alpha
-      04 - IA64
-         01 - IA64
-      05 - ARM
-         01 - ARM
-      06 - M68
-         05 - M68 (Big Endian)
-      07 - ARM Thumb
-         01 - ARMT
-      08 - SPARC
-         05 - SPARC
-
-   04 - PPMD
-      01 - Version
-
-   7F -
-      01 - experimental methods.
-
-
-04 - Misc
-   00 - Reserved
-   01 - Zip
-      00 - Copy (not used). Use {00} instead
-      01 - Shrink
-      06 - Implode
-      08 - Deflate
-      09 - Deflate64
-      12 - BZip2 (not used). Use {04 02 02} instead
-   02 - BZip
-      02 - BZip2
-   03 - Rar
-      01 - Rar15
-      02 - Rar20
-      03 - Rar29
-   04 - Arj
-      01 - Arj (1,2,3)
-      02 - Arj 4
-   05 - Z
-   06 - Lzh
-   07 - Reserved for 7z
-   08 - Cab
-   09 - NSIS
-      01 - DeflateNSIS
-      02 - BZip2NSIS
-
-
-06 - Crypto 
-   00 - 
-   01 - AES
-      0x - AES-128
-      4x - AES-192
-      8x - AES-256
-      Cx - AES
-
-      x0 - ECB
-      x1 - CBC
-      x2 - CFB
-      x3 - OFB
-
-   07 - Reserved
-   0F - Reserved
-
-   F0 - Misc Ciphers (Real Ciphers without hashing algo)
-
-   F1 - Misc Ciphers (Combine)
-      01 - Zip
-         01 - Main Zip crypto algo
-      03 - RAR
-         02 - 
-         03 - Rar29 AES-128 + (modified SHA-1)
-      07 - 7z
-         01 - AES-256 + SHA-256
-
-07 - Hash (subject to change)
-   00 - 
-   01 - CRC
-   02 - SHA-1
-   03 - SHA-256
-   04 - SHA-384
-   05 - SHA-512
-
-   F0 - Misc Hash
-
-   F1 - Misc
-      03 - RAR
-         03 - Rar29 Password Hashing (modified SHA1)
-      07 - 7z 
-         01 - SHA-256 Password Hashing
-    
-   
-
-
----
-End of document