git://cygwin.com / cygwin-apps / setup.git / blame
| Commit | Line | Data |
|---|---|---|
| 5bb88929 CW |
1 | /* |
| 2 | * Copyright (c) 2008, Charles Wilson | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify | |
| 5 | * it under the terms of the GNU General Public License as published by | |
| 6 | * the Free Software Foundation; either version 2 of the License, or | |
| 7 | * (at your option) any later version. | |
| 8 | * | |
| 9 | * A copy of the GNU General Public License can be found at | |
| 10 | * http://www.gnu.org/ | |
| 11 | * | |
| 12 | * Written by Charles Wilson <cygwin@cygwin.com> | |
| 13 | * | |
| 14 | */ | |
| 15 | ||
| 16 | #ifndef SETUP_COMPRESS_LZMA_H | |
| 17 | #define SETUP_COMPRESS_LZMA_H | |
| 18 | ||
| 19 | /* this is the parent class for all compress IO operations. | |
| 20 | */ | |
| 21 | ||
| 22 | #include "compress.h" | |
| 23 | #include "lzma-sdk/LzmaDec.h" | |
| 24 | ||
| 25 | class compress_lzma:public compress | |
| 26 | { | |
| 27 | public: | |
| 28 | compress_lzma (io_stream *); /* decompress (read) only */ | |
| 29 | virtual ssize_t read (void *buffer, size_t len); | |
| 30 | virtual ssize_t write (const void *buffer, size_t len); /* not implemented */ | |
| 31 | virtual ssize_t peek (void *buffer, size_t len); | |
| 32 | virtual long tell (); /* not implemented */ | |
| 33 | virtual int seek (long where, io_stream_seek_t whence); /* not implemented */ | |
| 34 | virtual int error (); | |
| 35 | virtual const char *next_file_name () { return NULL; }; | |
| 26922cd2 | 36 | virtual int set_mtime (time_t); |
| b41c2908 CV |
37 | virtual time_t get_mtime (); |
| 38 | virtual mode_t get_mode (); | |
| 5bb88929 CW |
39 | virtual size_t get_size () {return 0;}; |
| 40 | virtual ~compress_lzma (); | |
| 41 | static bool is_lzma(void *buffer, size_t len); | |
| 42 | virtual void release_original(); /* give up ownership of original io_stream */ | |
| 43 | ||
| 44 | private: | |
| 45 | compress_lzma () {}; | |
| 46 | ||
| 47 | io_stream *original; | |
| 48 | bool owns_original; | |
| 49 | char peekbuf[512]; | |
| 50 | size_t peeklen; | |
| 51 | int lasterr; | |
| 52 | bool initializedOk; | |
| 53 | void check_header (); | |
| 54 | void destroy (); | |
| 55 | ||
| 56 | /* from lzma */ | |
| 57 | static const size_t IN_BUF_SIZE = (1 << 16); | |
| 58 | static const size_t OUT_BUF_SIZE = (1 << 16); | |
| 59 | unsigned char header[LZMA_PROPS_SIZE + 8]; | |
| 60 | UInt64 unpackSize; | |
| 61 | bool thereIsSize; /* true means header specifies uncompressed size */ | |
| 62 | CLzmaDec state; | |
| 63 | unsigned char * inbuf; | |
| 64 | unsigned char * outbuf; | |
| 65 | unsigned char * outp; | |
| 66 | size_t inPos; | |
| 67 | size_t inSize; | |
| 68 | size_t outPos; | |
| 69 | SizeT inProcessed; | |
| 70 | SizeT outProcessed; | |
| 71 | }; | |
| 72 | ||
| 73 | #endif /* SETUP_COMPRESS_LZMA_H */ |