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0001 GNU GENERAL PUBLIC LICENSE 0002 Version 1, February 1989 0003 0004 Copyright (C) 1989 Free Software Foundation, Inc. 51 Franklin St, Fifth Floor, 0005 Boston, MA 02110-1301 USA 0006 0007 Everyone is permitted to copy and distribute verbatim copies of this license 0008 document, but changing it is not allowed. 0009 0010 Preamble 0011 0012 The license agreements of most software companies try to keep users at the 0013 mercy of those companies. By contrast, our General Public License is intended 0014 to guarantee your freedom to share and change free software--to make sure 0015 the software is free for all its users. The General Public License applies 0016 to the Free Software Foundation's software and to any other program whose 0017 authors commit to using it. You can use it for your programs, too. 0018 0019 When we speak of free software, we are referring to freedom, not price. Specifically, 0020 the General Public License is designed to make sure that you have the freedom 0021 to give away or sell copies of free software, that you receive source code 0022 or can get it if you want it, that you can change the software or use pieces 0023 of it in new free programs; and that you know you can do these things. 0024 0025 To protect your rights, we need to make restrictions that forbid anyone to 0026 deny you these rights or to ask you to surrender the rights. These restrictions 0027 translate to certain responsibilities for you if you distribute copies of 0028 the software, or if you modify it. 0029 0030 For example, if you distribute copies of a such a program, whether gratis 0031 or for a fee, you must give the recipients all the rights that you have. You 0032 must make sure that they, too, receive or can get the source code. And you 0033 must tell them their rights. 0034 0035 We protect your rights with two steps: (1) copyright the software, and (2) 0036 offer you this license which gives you legal permission to copy, distribute 0037 and/or modify the software. 0038 0039 Also, for each author's protection and ours, we want to make certain that 0040 everyone understands that there is no warranty for this free software. If 0041 the software is modified by someone else and passed on, we want its recipients 0042 to know that what they have is not the original, so that any problems introduced 0043 by others will not reflect on the original authors' reputations. 0044 0045 The precise terms and conditions for copying, distribution and modification 0046 follow. 0047 0048 GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION 0049 AND MODIFICATION 0050 0051 0. This License Agreement applies to any program or other work which contains 0052 a notice placed by the copyright holder saying it may be distributed under 0053 the terms of this General Public License. The "Program", below, refers to 0054 any such program or work, and a "work based on the Program" means either the 0055 Program or any work containing the Program or a portion of it, either verbatim 0056 or with modifications. Each licensee is addressed as "you". 0057 0058 1. You may copy and distribute verbatim copies of the Program's source code 0059 as you receive it, in any medium, provided that you conspicuously and appropriately 0060 publish on each copy an appropriate copyright notice and disclaimer of warranty; 0061 keep intact all the notices that refer to this General Public License and 0062 to the absence of any warranty; and give any other recipients of the Program 0063 a copy of this General Public License along with the Program. You may charge 0064 a fee for the physical act of transferring a copy. 0065 0066 2. You may modify your copy or copies of the Program or any portion of it, 0067 and copy and distribute such modifications under the terms of Paragraph 1 0068 above, provided that you also do the following: 0069 0070 a) cause the modified files to carry prominent notices stating that you changed 0071 the files and the date of any change; and 0072 0073 b) cause the whole of any work that you distribute or publish, that in whole 0074 or in part contains the Program or any part thereof, either with or without 0075 modifications, to be licensed at no charge to all third parties under the 0076 terms of this General Public License (except that you may choose to grant 0077 warranty protection to some or all third parties, at your option). 0078 0079 c) If the modified program normally reads commands interactively when run, 0080 you must cause it, when started running for such interactive use in the simplest 0081 and most usual way, to print or display an announcement including an appropriate 0082 copyright notice and a notice that there is no warranty (or else, saying that 0083 you provide a warranty) and that users may redistribute the program under 0084 these conditions, and telling the user how to view a copy of this General 0085 Public License. 0086 0087 d) You may charge a fee for the physical act of transferring a copy, and you 0088 may at your option offer warranty protection in exchange for a fee. 0089 0090 Mere aggregation of another independent work with the Program (or its derivative) 0091 on a volume of a storage or distribution medium does not bring the other work 0092 under the scope of these terms. 0093 0094 3. You may copy and distribute the Program (or a portion or derivative of 0095 it, under Paragraph 2) in object code or executable form under the terms of 0096 Paragraphs 1 and 2 above provided that you also do one of the following: 0097 0098 a) accompany it with the complete corresponding machine-readable source code, 0099 which must be distributed under the terms of Paragraphs 1 and 2 above; or, 0100 0101 b) accompany it with a written offer, valid for at least three years, to give 0102 any third party free (except for a nominal charge for the cost of distribution) 0103 a complete machine-readable copy of the corresponding source code, to be distributed 0104 under the terms of Paragraphs 1 and 2 above; or, 0105 0106 c) accompany it with the information you received as to where the corresponding 0107 source code may be obtained. (This alternative is allowed only for noncommercial 0108 distribution and only if you received the program in object code or executable 0109 form alone.) 0110 0111 Source code for a work means the preferred form of the work for making modifications 0112 to it. For an executable file, complete source code means all the source code 0113 for all modules it contains; but, as a special exception, it need not include 0114 source code for modules which are standard libraries that accompany the operating 0115 system on which the executable file runs, or for standard header files or 0116 definitions files that accompany that operating system. 0117 0118 4. You may not copy, modify, sublicense, distribute or transfer the Program 0119 except as expressly provided under this General Public License. Any attempt 0120 otherwise to copy, modify, sublicense, distribute or transfer the Program 0121 is void, and will automatically terminate your rights to use the Program under 0122 this License. However, parties who have received copies, or rights to use 0123 copies, from you under this General Public License will not have their licenses 0124 terminated so long as such parties remain in full compliance. 0125 0126 5. By copying, distributing or modifying the Program (or any work based on 0127 the Program) you indicate your acceptance of this license to do so, and all 0128 its terms and conditions. 0129 0130 6. Each time you redistribute the Program (or any work based on the Program), 0131 the recipient automatically receives a license from the original licensor 0132 to copy, distribute or modify the Program subject to these terms and conditions. 0133 You may not impose any further restrictions on the recipients' exercise of 0134 the rights granted herein. 0135 0136 7. The Free Software Foundation may publish revised and/or new versions of 0137 the General Public License from time to time. Such new versions will be similar 0138 in spirit to the present version, but may differ in detail to address new 0139 problems or concerns. 0140 0141 Each version is given a distinguishing version number. If the Program specifies 0142 a version number of the license which applies to it and "any later version", 0143 you have the option of following the terms and conditions either of that version 0144 or of any later version published by the Free Software Foundation. If the 0145 Program does not specify a version number of the license, you may choose any 0146 version ever published by the Free Software Foundation. 0147 0148 8. If you wish to incorporate parts of the Program into other free programs 0149 whose distribution conditions are different, write to the author to ask for 0150 permission. For software which is copyrighted by the Free Software Foundation, 0151 write to the Free Software Foundation; we sometimes make exceptions for this. 0152 Our decision will be guided by the two goals of preserving the free status 0153 of all derivatives of our free software and of promoting the sharing and reuse 0154 of software generally. 0155 0156 NO WARRANTY 0157 0158 9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR 0159 THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE 0160 STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM 0161 "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, 0162 BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 0163 FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE 0164 OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME 0165 THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 0166 0167 10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 0168 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE 0169 THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 0170 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE 0171 OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA 0172 OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES 0173 OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH 0174 HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. 0175 0176 END OF TERMS AND CONDITIONS 0177 0178 Appendix: How to Apply These Terms to Your New Programs 0179 0180 If you develop a new program, and you want it to be of the greatest possible 0181 use to humanity, the best way to achieve this is to make it free software 0182 which everyone can redistribute and change under these terms. 0183 0184 To do so, attach the following notices to the program. It is safest to attach 0185 them to the start of each source file to most effectively convey the exclusion 0186 of warranty; and each file should have at least the "copyright" line and a 0187 pointer to where the full notice is found. 0188 0189 <one line to give the program's name and a brief idea of what it does.> Copyright 0190 (C) 19yy <name of author> 0191 0192 This program is free software; you can redistribute it and/or modify it under 0193 the terms of the GNU General Public License as published by the Free Software 0194 Foundation; either version 1, or (at your option) any later version. 0195 0196 This program is distributed in the hope that it will be useful, but WITHOUT 0197 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 0198 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. 0199 0200 You should have received a copy of the GNU General Public License along with 0201 this program; if not, write to the Free Software Foundation, Inc., 675 Mass 0202 Ave, Cambridge, MA 02139, USA. 0203 0204 Also add information on how to contact you by electronic and paper mail. 0205 0206 If the program is interactive, make it output a short notice like this when 0207 it starts in an interactive mode: 0208 0209 Gnomovision version 69, Copyright (C) 19xx name of author Gnomovision comes 0210 with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, 0211 and you are welcome to redistribute it under certain conditions; type `show 0212 c' for details. 0213 0214 The hypothetical commands `show w' and `show c' should show the appropriate 0215 parts of the General Public License. Of course, the commands you use may be 0216 called something other than `show w' and `show c'; they could even be mouse-clicks 0217 or menu items--whatever suits your program. 0218 0219 You should also get your employer (if you work as a programmer) or your school, 0220 if any, to sign a "copyright disclaimer" for the program, if necessary. Here 0221 a sample; alter the names: 0222 0223 Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' 0224 (a program to direct compilers to make passes at assemblers) written by James 0225 Hacker. 0226 0227 <signature of Ty Coon>, 1 April 1989 Ty Coon, President of Vice 0228 0229 That's all there is to it!