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1 | /* |
2 | * Copyright (c) 2001, Robert Collins. | |
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 Robert Collins <rbtcollins@hotmail.com> | |
13 | * | |
14 | */ | |
15 | ||
16 | #ifndef _COMPRESS_BZ_H_ | |
17 | #define _COMPRESS_BZ_H_ | |
18 | ||
19 | /* this is the bz2 class for all compressed IO operations. | |
20 | */ | |
21 | ||
22 | #ifdef _WIN32 | |
23 | #undef _WIN32 | |
db04fc41 | 24 | #include <bzlib.h> |
b24c88b3 RC |
25 | #define _WIN32 |
26 | #else | |
db04fc41 | 27 | #include <bzlib.h> |
b24c88b3 RC |
28 | #endif |
29 | ||
30 | class compress_bz:public compress | |
31 | { | |
32 | public: | |
33 | /* assumes decompression */ | |
34 | compress_bz (io_stream *); | |
35 | /* allows comp/decomp but this implementation only handles comp */ | |
36 | compress_bz (io_stream *, const char *); | |
37 | /* read data (duh!) */ | |
38 | virtual ssize_t read (void *buffer, size_t len); | |
39 | /* provide data to (double duh!) */ | |
ca9506cc | 40 | virtual ssize_t write (const void *buffer, size_t len); |
b24c88b3 RC |
41 | /* read data without removing it from the class's internal buffer */ |
42 | virtual ssize_t peek (void *buffer, size_t len); | |
43 | virtual long tell (); | |
ca9506cc | 44 | virtual int seek (long where, io_stream_seek_t whence); |
b24c88b3 RC |
45 | /* try guessing this one */ |
46 | virtual int error (); | |
47 | /* Find out the next stream name - | |
48 | * ie for foo.tar.bz, at offset 0, next_file_name = foo.tar | |
49 | * for foobar that is an compress, next_file_name is the next | |
50 | * extractable filename. | |
51 | */ | |
52 | virtual const char *next_file_name () | |
53 | { | |
54 | return NULL; | |
55 | }; | |
56 | virtual int set_mtime (int); | |
341988b9 RC |
57 | /* Use seek EOF, then tell (). get_size won't do this incase you are sucking dow |
58 | * over a WAN :} */ | |
59 | virtual size_t get_size () {return 0;}; | |
b24c88b3 RC |
60 | virtual int get_mtime (); |
61 | /* if you are still needing these hints... give up now! */ | |
62 | virtual ~ compress_bz (); | |
63 | private: | |
64 | io_stream *original; | |
65 | char peekbuf[512]; | |
66 | size_t peeklen; | |
67 | int lasterr; | |
68 | bz_stream strm; | |
69 | int initialisedOk; | |
70 | int bufN; | |
71 | char buf[4096]; | |
72 | int writing; | |
387cb501 | 73 | size_t position; |
b24c88b3 RC |
74 | }; |
75 | ||
76 | #endif /* _COMPRESS_BZ_H_ */ |