| README (90067) | README (146293) |
|---|---|
| 1 2This is the README for bzip2, a block-sorting file compressor, version | 1 2This is the README for bzip2, a block-sorting file compressor, version |
| 31.0.2. This version is fully compatible with the previous public 4releases, versions 0.1pl2, 0.9.0, 0.9.5, 1.0.0 and 1.0.1. | 31.0.3. This version is fully compatible with the previous public 4releases, versions 0.1pl2, 0.9.0, 0.9.5, 1.0.0, 1.0.1 and 1.0.2. |
| 5 | 5 |
| 6bzip2-1.0.2 is distributed under a BSD-style license. For details, | 6bzip2-1.0.3 is distributed under a BSD-style license. For details, |
| 7see the file LICENSE. 8 9Complete documentation is available in Postscript form (manual.ps), | 7see the file LICENSE. 8 9Complete documentation is available in Postscript form (manual.ps), |
| 10PDF (manual.pdf, amazingly enough) or html (manual_toc.html). A 11plain-text version of the manual page is available as bzip2.txt. 12A statement about Y2K issues is now included in the file Y2K_INFO. | 10PDF (manual.pdf) or html (manual.html). A plain-text version of the 11manual page is available as bzip2.txt. A statement about Y2K issues 12is now included in the file Y2K_INFO. |
| 13 14 15HOW TO BUILD -- UNIX 16 17Type `make'. This builds the library libbz2.a and then the 18programs bzip2 and bzip2recover. Six self-tests are run. 19If the self-tests complete ok, carry on to installation: 20 --- 52 unchanged lines hidden (view full) --- 73VALIDATION 74 75Correct operation, in the sense that a compressed file can always be 76decompressed to reproduce the original, is obviously of paramount 77importance. To validate bzip2, I used a modified version of Mark 78Nelson's churn program. Churn is an automated test driver which 79recursively traverses a directory structure, using bzip2 to compress 80and then decompress each file it encounters, and checking that the | 13 14 15HOW TO BUILD -- UNIX 16 17Type `make'. This builds the library libbz2.a and then the 18programs bzip2 and bzip2recover. Six self-tests are run. 19If the self-tests complete ok, carry on to installation: 20 --- 52 unchanged lines hidden (view full) --- 73VALIDATION 74 75Correct operation, in the sense that a compressed file can always be 76decompressed to reproduce the original, is obviously of paramount 77importance. To validate bzip2, I used a modified version of Mark 78Nelson's churn program. Churn is an automated test driver which 79recursively traverses a directory structure, using bzip2 to compress 80and then decompress each file it encounters, and checking that the |
| 81decompressed data is the same as the original. There are more details 82in Section 4 of the user guide. | 81decompressed data is the same as the original. |
| 83 84 85 86Please read and be aware of the following: 87 88WARNING: 89 90 This program (attempts to) compress data by performing several --- 23 unchanged lines hidden (view full) --- 114 That is not to say this program is inherently unreliable. Indeed, 115 I very much hope the opposite is true. bzip2 has been carefully 116 constructed and extensively tested. 117 118 119PATENTS: 120 121 To the best of my knowledge, bzip2 does not use any patented | 82 83 84 85Please read and be aware of the following: 86 87WARNING: 88 89 This program (attempts to) compress data by performing several --- 23 unchanged lines hidden (view full) --- 113 That is not to say this program is inherently unreliable. Indeed, 114 I very much hope the opposite is true. bzip2 has been carefully 115 constructed and extensively tested. 116 117 118PATENTS: 119 120 To the best of my knowledge, bzip2 does not use any patented |
| 122 algorithms. However, I do not have the resources available to 123 carry out a full patent search. Therefore I cannot give any 124 guarantee of the above statement. | 121 algorithms. However, I do not have the resources to carry out 122 a patent search. Therefore I cannot give any guarantee of the 123 above statement. |
| 125 126End of legalities. 127 128 129WHAT'S NEW IN 0.9.0 (as compared to 0.1pl2) ? 130 131 * Approx 10% faster compression, 30% faster decompression 132 * -t (test mode) is a lot quicker --- 15 unchanged lines hidden (view full) --- 148WHAT'S NEW IN 1.0.0 ? 149 150 See the CHANGES file. 151 152WHAT'S NEW IN 1.0.2 ? 153 154 See the CHANGES file. 155 | 124 125End of legalities. 126 127 128WHAT'S NEW IN 0.9.0 (as compared to 0.1pl2) ? 129 130 * Approx 10% faster compression, 30% faster decompression 131 * -t (test mode) is a lot quicker --- 15 unchanged lines hidden (view full) --- 147WHAT'S NEW IN 1.0.0 ? 148 149 See the CHANGES file. 150 151WHAT'S NEW IN 1.0.2 ? 152 153 See the CHANGES file. 154 |
| 155WHAT'S NEW IN 1.0.3 ? |
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| 156 | 156 |
| 157 See the CHANGES file. 158 159 |
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| 157I hope you find bzip2 useful. Feel free to contact me at | 160I hope you find bzip2 useful. Feel free to contact me at |
| 158 jseward@acm.org | 161 jseward@bzip.org |
| 159if you have any suggestions or queries. Many people mailed me with 160comments, suggestions and patches after the releases of bzip-0.15, | 162if you have any suggestions or queries. Many people mailed me with 163comments, suggestions and patches after the releases of bzip-0.15, |
| 161bzip-0.21, and bzip2 versions 0.1pl2, 0.9.0, 0.9.5, 1.0.0 and 1.0.1, 162and the changes in bzip2 are largely a result of this feedback. | 164bzip-0.21, and bzip2 versions 0.1pl2, 0.9.0, 0.9.5, 1.0.0, 1.0.1 and 1651.0.2, and the changes in bzip2 are largely a result of this feedback. |
| 163I thank you for your comments. 164 165At least for the time being, bzip2's "home" is (or can be reached via) | 166I thank you for your comments. 167 168At least for the time being, bzip2's "home" is (or can be reached via) |
| 166http://sources.redhat.com/bzip2. | 169http://www.bzip.org |
| 167 168Julian Seward | 170 171Julian Seward |
| 169jseward@acm.org | 172jseward@bzip.org |
| 170 | 173 |
| 171Cambridge, UK (and what a great town this is!) | 174Cambridge, UK. |
| 172 17318 July 1996 (version 0.15) 17425 August 1996 (version 0.21) 175 7 August 1997 (bzip2, version 0.1) 17629 August 1997 (bzip2, version 0.1pl2) 17723 August 1998 (bzip2, version 0.9.0) 178 8 June 1999 (bzip2, version 0.9.5) 179 4 Sept 1999 (bzip2, version 0.9.5d) 180 5 May 2000 (bzip2, version 1.0pre8) 18130 December 2001 (bzip2, version 1.0.2pre1) | 175 17618 July 1996 (version 0.15) 17725 August 1996 (version 0.21) 178 7 August 1997 (bzip2, version 0.1) 17929 August 1997 (bzip2, version 0.1pl2) 18023 August 1998 (bzip2, version 0.9.0) 181 8 June 1999 (bzip2, version 0.9.5) 182 4 Sept 1999 (bzip2, version 0.9.5d) 183 5 May 2000 (bzip2, version 1.0pre8) 18430 December 2001 (bzip2, version 1.0.2pre1) |
| 18515 February 2005 (bzip2, version 1.0.3) |
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