CHANGES (6251B)
1 2 3 0.9.0 4 ~~~~~ 5 First version. 6 7 8 0.9.0a 9 ~~~~~~ 10 Removed 'ranlib' from Makefile, since most modern Unix-es 11 don't need it, or even know about it. 12 13 14 0.9.0b 15 ~~~~~~ 16 Fixed a problem with error reporting in bzip2.c. This does not effect 17 the library in any way. Problem is: versions 0.9.0 and 0.9.0a (of the 18 program proper) compress and decompress correctly, but give misleading 19 error messages (internal panics) when an I/O error occurs, instead of 20 reporting the problem correctly. This shouldn't give any data loss 21 (as far as I can see), but is confusing. 22 23 Made the inline declarations disappear for non-GCC compilers. 24 25 26 0.9.0c 27 ~~~~~~ 28 Fixed some problems in the library pertaining to some boundary cases. 29 This makes the library behave more correctly in those situations. The 30 fixes apply only to features (calls and parameters) not used by 31 bzip2.c, so the non-fixedness of them in previous versions has no 32 effect on reliability of bzip2.c. 33 34 In bzlib.c: 35 * made zero-length BZ_FLUSH work correctly in bzCompress(). 36 * fixed bzWrite/bzRead to ignore zero-length requests. 37 * fixed bzread to correctly handle read requests after EOF. 38 * wrong parameter order in call to bzDecompressInit in 39 bzBuffToBuffDecompress. Fixed. 40 41 In compress.c: 42 * changed setting of nGroups in sendMTFValues() so as to 43 do a bit better on small files. This _does_ effect 44 bzip2.c. 45 46 47 0.9.5a 48 ~~~~~~ 49 Major change: add a fallback sorting algorithm (blocksort.c) 50 to give reasonable behaviour even for very repetitive inputs. 51 Nuked --repetitive-best and --repetitive-fast since they are 52 no longer useful. 53 54 Minor changes: mostly a whole bunch of small changes/ 55 bugfixes in the driver (bzip2.c). Changes pertaining to the 56 user interface are: 57 58 allow decompression of symlink'd files to stdout 59 decompress/test files even without .bz2 extension 60 give more accurate error messages for I/O errors 61 when compressing/decompressing to stdout, don't catch control-C 62 read flags from BZIP2 and BZIP environment variables 63 decline to break hard links to a file unless forced with -f 64 allow -c flag even with no filenames 65 preserve file ownerships as far as possible 66 make -s -1 give the expected block size (100k) 67 add a flag -q --quiet to suppress nonessential warnings 68 stop decoding flags after --, so files beginning in - can be handled 69 resolved inconsistent naming: bzcat or bz2cat ? 70 bzip2 --help now returns 0 71 72 Programming-level changes are: 73 74 fixed syntax error in GET_LL4 for Borland C++ 5.02 75 let bzBuffToBuffDecompress return BZ_DATA_ERROR{_MAGIC} 76 fix overshoot of mode-string end in bzopen_or_bzdopen 77 wrapped bzlib.h in #ifdef __cplusplus ... extern "C" { ... } 78 close file handles under all error conditions 79 added minor mods so it compiles with DJGPP out of the box 80 fixed Makefile so it doesn't give problems with BSD make 81 fix uninitialised memory reads in dlltest.c 82 83 0.9.5b 84 ~~~~~~ 85 Open stdin/stdout in binary mode for DJGPP. 86 87 0.9.5c 88 ~~~~~~ 89 Changed BZ_N_OVERSHOOT to be ... + 2 instead of ... + 1. The + 1 90 version could cause the sorted order to be wrong in some extremely 91 obscure cases. Also changed setting of quadrant in blocksort.c. 92 93 0.9.5d 94 ~~~~~~ 95 The only functional change is to make bzlibVersion() in the library 96 return the correct string. This has no effect whatsoever on the 97 functioning of the bzip2 program or library. Added a couple of casts 98 so the library compiles without warnings at level 3 in MS Visual 99 Studio 6.0. Included a Y2K statement in the file Y2K_INFO. All other 100 changes are minor documentation changes. 101 102 1.0 103 ~~~ 104 Several minor bugfixes and enhancements: 105 106 * Large file support. The library uses 64-bit counters to 107 count the volume of data passing through it. bzip2.c 108 is now compiled with -D_FILE_OFFSET_BITS=64 to get large 109 file support from the C library. -v correctly prints out 110 file sizes greater than 4 gigabytes. All these changes have 111 been made without assuming a 64-bit platform or a C compiler 112 which supports 64-bit ints, so, except for the C library 113 aspect, they are fully portable. 114 115 * Decompression robustness. The library/program should be 116 robust to any corruption of compressed data, detecting and 117 handling _all_ corruption, instead of merely relying on 118 the CRCs. What this means is that the program should 119 never crash, given corrupted data, and the library should 120 always return BZ_DATA_ERROR. 121 122 * Fixed an obscure race-condition bug only ever observed on 123 Solaris, in which, if you were very unlucky and issued 124 control-C at exactly the wrong time, both input and output 125 files would be deleted. 126 127 * Don't run out of file handles on test/decompression when 128 large numbers of files have invalid magic numbers. 129 130 * Avoid library namespace pollution. Prefix all exported 131 symbols with BZ2_. 132 133 * Minor sorting enhancements from my DCC2000 paper. 134 135 * Advance the version number to 1.0, so as to counteract the 136 (false-in-this-case) impression some people have that programs 137 with version numbers less than 1.0 are in someway, experimental, 138 pre-release versions. 139 140 * Create an initial Makefile-libbz2_so to build a shared library. 141 Yes, I know I should really use libtool et al ... 142 143 * Make the program exit with 2 instead of 0 when decompression 144 fails due to a bad magic number (ie, an invalid bzip2 header). 145 Also exit with 1 (as the manual claims :-) whenever a diagnostic 146 message would have been printed AND the corresponding operation 147 is aborted, for example 148 bzip2: Output file xx already exists. 149 When a diagnostic message is printed but the operation is not 150 aborted, for example 151 bzip2: Can't guess original name for wurble -- using wurble.out 152 then the exit value 0 is returned, unless some other problem is 153 also detected. 154 155 I think it corresponds more closely to what the manual claims now. 156 157 158 1.0.1 159 ~~~~~ 160 * Modified dlltest.c so it uses the new BZ2_ naming scheme. 161 * Modified makefile-msc to fix minor build probs on Win2k. 162 * Updated README.COMPILATION.PROBLEMS. 163 164 There are no functionality changes or bug fixes relative to version 165 1.0.0. This is just a documentation update + a fix for minor Win32 166 build problems. For almost everyone, upgrading from 1.0.0 to 1.0.1 is 167 utterly pointless. Don't bother.