/[dtapublic]/projs/trunk/shared_source/c_datd/crchashfuncs.c
ViewVC logotype

Contents of /projs/trunk/shared_source/c_datd/crchashfuncs.c

Parent Directory Parent Directory | Revision Log Revision Log


Revision 42 - (show annotations) (download)
Fri Oct 14 01:50:00 2016 UTC (7 years, 5 months ago) by dashley
File MIME type: text/plain
File size: 49150 byte(s)
Move shared source code to commonize.
1 /* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/c_datd/crchashfuncs.c,v 1.3 2001/07/26 21:41:21 dtashley Exp $ */
2 //--------------------------------------------------------------------------------
3 //Copyright 2001 David T. Ashley
4 //-------------------------------------------------------------------------------------------------
5 //This source code and any program in which it is compiled/used is provided under the GNU GENERAL
6 //PUBLIC LICENSE, Version 3, full license text below.
7 //-------------------------------------------------------------------------------------------------
8 // GNU GENERAL PUBLIC LICENSE
9 // Version 3, 29 June 2007
10 //
11 // Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
12 // Everyone is permitted to copy and distribute verbatim copies
13 // of this license document, but changing it is not allowed.
14 //
15 // Preamble
16 //
17 // The GNU General Public License is a free, copyleft license for
18 //software and other kinds of works.
19 //
20 // The licenses for most software and other practical works are designed
21 //to take away your freedom to share and change the works. By contrast,
22 //the GNU General Public License is intended to guarantee your freedom to
23 //share and change all versions of a program--to make sure it remains free
24 //software for all its users. We, the Free Software Foundation, use the
25 //GNU General Public License for most of our software; it applies also to
26 //any other work released this way by its authors. You can apply it to
27 //your programs, too.
28 //
29 // When we speak of free software, we are referring to freedom, not
30 //price. Our General Public Licenses are designed to make sure that you
31 //have the freedom to distribute copies of free software (and charge for
32 //them if you wish), that you receive source code or can get it if you
33 //want it, that you can change the software or use pieces of it in new
34 //free programs, and that you know you can do these things.
35 //
36 // To protect your rights, we need to prevent others from denying you
37 //these rights or asking you to surrender the rights. Therefore, you have
38 //certain responsibilities if you distribute copies of the software, or if
39 //you modify it: responsibilities to respect the freedom of others.
40 //
41 // For example, if you distribute copies of such a program, whether
42 //gratis or for a fee, you must pass on to the recipients the same
43 //freedoms that you received. You must make sure that they, too, receive
44 //or can get the source code. And you must show them these terms so they
45 //know their rights.
46 //
47 // Developers that use the GNU GPL protect your rights with two steps:
48 //(1) assert copyright on the software, and (2) offer you this License
49 //giving you legal permission to copy, distribute and/or modify it.
50 //
51 // For the developers' and authors' protection, the GPL clearly explains
52 //that there is no warranty for this free software. For both users' and
53 //authors' sake, the GPL requires that modified versions be marked as
54 //changed, so that their problems will not be attributed erroneously to
55 //authors of previous versions.
56 //
57 // Some devices are designed to deny users access to install or run
58 //modified versions of the software inside them, although the manufacturer
59 //can do so. This is fundamentally incompatible with the aim of
60 //protecting users' freedom to change the software. The systematic
61 //pattern of such abuse occurs in the area of products for individuals to
62 //use, which is precisely where it is most unacceptable. Therefore, we
63 //have designed this version of the GPL to prohibit the practice for those
64 //products. If such problems arise substantially in other domains, we
65 //stand ready to extend this provision to those domains in future versions
66 //of the GPL, as needed to protect the freedom of users.
67 //
68 // Finally, every program is threatened constantly by software patents.
69 //States should not allow patents to restrict development and use of
70 //software on general-purpose computers, but in those that do, we wish to
71 //avoid the special danger that patents applied to a free program could
72 //make it effectively proprietary. To prevent this, the GPL assures that
73 //patents cannot be used to render the program non-free.
74 //
75 // The precise terms and conditions for copying, distribution and
76 //modification follow.
77 //
78 // TERMS AND CONDITIONS
79 //
80 // 0. Definitions.
81 //
82 // "This License" refers to version 3 of the GNU General Public License.
83 //
84 // "Copyright" also means copyright-like laws that apply to other kinds of
85 //works, such as semiconductor masks.
86 //
87 // "The Program" refers to any copyrightable work licensed under this
88 //License. Each licensee is addressed as "you". "Licensees" and
89 //"recipients" may be individuals or organizations.
90 //
91 // To "modify" a work means to copy from or adapt all or part of the work
92 //in a fashion requiring copyright permission, other than the making of an
93 //exact copy. The resulting work is called a "modified version" of the
94 //earlier work or a work "based on" the earlier work.
95 //
96 // A "covered work" means either the unmodified Program or a work based
97 //on the Program.
98 //
99 // To "propagate" a work means to do anything with it that, without
100 //permission, would make you directly or secondarily liable for
101 //infringement under applicable copyright law, except executing it on a
102 //computer or modifying a private copy. Propagation includes copying,
103 //distribution (with or without modification), making available to the
104 //public, and in some countries other activities as well.
105 //
106 // To "convey" a work means any kind of propagation that enables other
107 //parties to make or receive copies. Mere interaction with a user through
108 //a computer network, with no transfer of a copy, is not conveying.
109 //
110 // An interactive user interface displays "Appropriate Legal Notices"
111 //to the extent that it includes a convenient and prominently visible
112 //feature that (1) displays an appropriate copyright notice, and (2)
113 //tells the user that there is no warranty for the work (except to the
114 //extent that warranties are provided), that licensees may convey the
115 //work under this License, and how to view a copy of this License. If
116 //the interface presents a list of user commands or options, such as a
117 //menu, a prominent item in the list meets this criterion.
118 //
119 // 1. Source Code.
120 //
121 // The "source code" for a work means the preferred form of the work
122 //for making modifications to it. "Object code" means any non-source
123 //form of a work.
124 //
125 // A "Standard Interface" means an interface that either is an official
126 //standard defined by a recognized standards body, or, in the case of
127 //interfaces specified for a particular programming language, one that
128 //is widely used among developers working in that language.
129 //
130 // The "System Libraries" of an executable work include anything, other
131 //than the work as a whole, that (a) is included in the normal form of
132 //packaging a Major Component, but which is not part of that Major
133 //Component, and (b) serves only to enable use of the work with that
134 //Major Component, or to implement a Standard Interface for which an
135 //implementation is available to the public in source code form. A
136 //"Major Component", in this context, means a major essential component
137 //(kernel, window system, and so on) of the specific operating system
138 //(if any) on which the executable work runs, or a compiler used to
139 //produce the work, or an object code interpreter used to run it.
140 //
141 // The "Corresponding Source" for a work in object code form means all
142 //the source code needed to generate, install, and (for an executable
143 //work) run the object code and to modify the work, including scripts to
144 //control those activities. However, it does not include the work's
145 //System Libraries, or general-purpose tools or generally available free
146 //programs which are used unmodified in performing those activities but
147 //which are not part of the work. For example, Corresponding Source
148 //includes interface definition files associated with source files for
149 //the work, and the source code for shared libraries and dynamically
150 //linked subprograms that the work is specifically designed to require,
151 //such as by intimate data communication or control flow between those
152 //subprograms and other parts of the work.
153 //
154 // The Corresponding Source need not include anything that users
155 //can regenerate automatically from other parts of the Corresponding
156 //Source.
157 //
158 // The Corresponding Source for a work in source code form is that
159 //same work.
160 //
161 // 2. Basic Permissions.
162 //
163 // All rights granted under this License are granted for the term of
164 //copyright on the Program, and are irrevocable provided the stated
165 //conditions are met. This License explicitly affirms your unlimited
166 //permission to run the unmodified Program. The output from running a
167 //covered work is covered by this License only if the output, given its
168 //content, constitutes a covered work. This License acknowledges your
169 //rights of fair use or other equivalent, as provided by copyright law.
170 //
171 // You may make, run and propagate covered works that you do not
172 //convey, without conditions so long as your license otherwise remains
173 //in force. You may convey covered works to others for the sole purpose
174 //of having them make modifications exclusively for you, or provide you
175 //with facilities for running those works, provided that you comply with
176 //the terms of this License in conveying all material for which you do
177 //not control copyright. Those thus making or running the covered works
178 //for you must do so exclusively on your behalf, under your direction
179 //and control, on terms that prohibit them from making any copies of
180 //your copyrighted material outside their relationship with you.
181 //
182 // Conveying under any other circumstances is permitted solely under
183 //the conditions stated below. Sublicensing is not allowed; section 10
184 //makes it unnecessary.
185 //
186 // 3. Protecting Users' Legal Rights From Anti-Circumvention Law.
187 //
188 // No covered work shall be deemed part of an effective technological
189 //measure under any applicable law fulfilling obligations under article
190 //11 of the WIPO copyright treaty adopted on 20 December 1996, or
191 //similar laws prohibiting or restricting circumvention of such
192 //measures.
193 //
194 // When you convey a covered work, you waive any legal power to forbid
195 //circumvention of technological measures to the extent such circumvention
196 //is effected by exercising rights under this License with respect to
197 //the covered work, and you disclaim any intention to limit operation or
198 //modification of the work as a means of enforcing, against the work's
199 //users, your or third parties' legal rights to forbid circumvention of
200 //technological measures.
201 //
202 // 4. Conveying Verbatim Copies.
203 //
204 // You may convey verbatim copies of the Program's source code as you
205 //receive it, in any medium, provided that you conspicuously and
206 //appropriately publish on each copy an appropriate copyright notice;
207 //keep intact all notices stating that this License and any
208 //non-permissive terms added in accord with section 7 apply to the code;
209 //keep intact all notices of the absence of any warranty; and give all
210 //recipients a copy of this License along with the Program.
211 //
212 // You may charge any price or no price for each copy that you convey,
213 //and you may offer support or warranty protection for a fee.
214 //
215 // 5. Conveying Modified Source Versions.
216 //
217 // You may convey a work based on the Program, or the modifications to
218 //produce it from the Program, in the form of source code under the
219 //terms of section 4, provided that you also meet all of these conditions:
220 //
221 // a) The work must carry prominent notices stating that you modified
222 // it, and giving a relevant date.
223 //
224 // b) The work must carry prominent notices stating that it is
225 // released under this License and any conditions added under section
226 // 7. This requirement modifies the requirement in section 4 to
227 // "keep intact all notices".
228 //
229 // c) You must license the entire work, as a whole, under this
230 // License to anyone who comes into possession of a copy. This
231 // License will therefore apply, along with any applicable section 7
232 // additional terms, to the whole of the work, and all its parts,
233 // regardless of how they are packaged. This License gives no
234 // permission to license the work in any other way, but it does not
235 // invalidate such permission if you have separately received it.
236 //
237 // d) If the work has interactive user interfaces, each must display
238 // Appropriate Legal Notices; however, if the Program has interactive
239 // interfaces that do not display Appropriate Legal Notices, your
240 // work need not make them do so.
241 //
242 // A compilation of a covered work with other separate and independent
243 //works, which are not by their nature extensions of the covered work,
244 //and which are not combined with it such as to form a larger program,
245 //in or on a volume of a storage or distribution medium, is called an
246 //"aggregate" if the compilation and its resulting copyright are not
247 //used to limit the access or legal rights of the compilation's users
248 //beyond what the individual works permit. Inclusion of a covered work
249 //in an aggregate does not cause this License to apply to the other
250 //parts of the aggregate.
251 //
252 // 6. Conveying Non-Source Forms.
253 //
254 // You may convey a covered work in object code form under the terms
255 //of sections 4 and 5, provided that you also convey the
256 //machine-readable Corresponding Source under the terms of this License,
257 //in one of these ways:
258 //
259 // a) Convey the object code in, or embodied in, a physical product
260 // (including a physical distribution medium), accompanied by the
261 // Corresponding Source fixed on a durable physical medium
262 // customarily used for software interchange.
263 //
264 // b) Convey the object code in, or embodied in, a physical product
265 // (including a physical distribution medium), accompanied by a
266 // written offer, valid for at least three years and valid for as
267 // long as you offer spare parts or customer support for that product
268 // model, to give anyone who possesses the object code either (1) a
269 // copy of the Corresponding Source for all the software in the
270 // product that is covered by this License, on a durable physical
271 // medium customarily used for software interchange, for a price no
272 // more than your reasonable cost of physically performing this
273 // conveying of source, or (2) access to copy the
274 // Corresponding Source from a network server at no charge.
275 //
276 // c) Convey individual copies of the object code with a copy of the
277 // written offer to provide the Corresponding Source. This
278 // alternative is allowed only occasionally and noncommercially, and
279 // only if you received the object code with such an offer, in accord
280 // with subsection 6b.
281 //
282 // d) Convey the object code by offering access from a designated
283 // place (gratis or for a charge), and offer equivalent access to the
284 // Corresponding Source in the same way through the same place at no
285 // further charge. You need not require recipients to copy the
286 // Corresponding Source along with the object code. If the place to
287 // copy the object code is a network server, the Corresponding Source
288 // may be on a different server (operated by you or a third party)
289 // that supports equivalent copying facilities, provided you maintain
290 // clear directions next to the object code saying where to find the
291 // Corresponding Source. Regardless of what server hosts the
292 // Corresponding Source, you remain obligated to ensure that it is
293 // available for as long as needed to satisfy these requirements.
294 //
295 // e) Convey the object code using peer-to-peer transmission, provided
296 // you inform other peers where the object code and Corresponding
297 // Source of the work are being offered to the general public at no
298 // charge under subsection 6d.
299 //
300 // A separable portion of the object code, whose source code is excluded
301 //from the Corresponding Source as a System Library, need not be
302 //included in conveying the object code work.
303 //
304 // A "User Product" is either (1) a "consumer product", which means any
305 //tangible personal property which is normally used for personal, family,
306 //or household purposes, or (2) anything designed or sold for incorporation
307 //into a dwelling. In determining whether a product is a consumer product,
308 //doubtful cases shall be resolved in favor of coverage. For a particular
309 //product received by a particular user, "normally used" refers to a
310 //typical or common use of that class of product, regardless of the status
311 //of the particular user or of the way in which the particular user
312 //actually uses, or expects or is expected to use, the product. A product
313 //is a consumer product regardless of whether the product has substantial
314 //commercial, industrial or non-consumer uses, unless such uses represent
315 //the only significant mode of use of the product.
316 //
317 // "Installation Information" for a User Product means any methods,
318 //procedures, authorization keys, or other information required to install
319 //and execute modified versions of a covered work in that User Product from
320 //a modified version of its Corresponding Source. The information must
321 //suffice to ensure that the continued functioning of the modified object
322 //code is in no case prevented or interfered with solely because
323 //modification has been made.
324 //
325 // If you convey an object code work under this section in, or with, or
326 //specifically for use in, a User Product, and the conveying occurs as
327 //part of a transaction in which the right of possession and use of the
328 //User Product is transferred to the recipient in perpetuity or for a
329 //fixed term (regardless of how the transaction is characterized), the
330 //Corresponding Source conveyed under this section must be accompanied
331 //by the Installation Information. But this requirement does not apply
332 //if neither you nor any third party retains the ability to install
333 //modified object code on the User Product (for example, the work has
334 //been installed in ROM).
335 //
336 // The requirement to provide Installation Information does not include a
337 //requirement to continue to provide support service, warranty, or updates
338 //for a work that has been modified or installed by the recipient, or for
339 //the User Product in which it has been modified or installed. Access to a
340 //network may be denied when the modification itself materially and
341 //adversely affects the operation of the network or violates the rules and
342 //protocols for communication across the network.
343 //
344 // Corresponding Source conveyed, and Installation Information provided,
345 //in accord with this section must be in a format that is publicly
346 //documented (and with an implementation available to the public in
347 //source code form), and must require no special password or key for
348 //unpacking, reading or copying.
349 //
350 // 7. Additional Terms.
351 //
352 // "Additional permissions" are terms that supplement the terms of this
353 //License by making exceptions from one or more of its conditions.
354 //Additional permissions that are applicable to the entire Program shall
355 //be treated as though they were included in this License, to the extent
356 //that they are valid under applicable law. If additional permissions
357 //apply only to part of the Program, that part may be used separately
358 //under those permissions, but the entire Program remains governed by
359 //this License without regard to the additional permissions.
360 //
361 // When you convey a copy of a covered work, you may at your option
362 //remove any additional permissions from that copy, or from any part of
363 //it. (Additional permissions may be written to require their own
364 //removal in certain cases when you modify the work.) You may place
365 //additional permissions on material, added by you to a covered work,
366 //for which you have or can give appropriate copyright permission.
367 //
368 // Notwithstanding any other provision of this License, for material you
369 //add to a covered work, you may (if authorized by the copyright holders of
370 //that material) supplement the terms of this License with terms:
371 //
372 // a) Disclaiming warranty or limiting liability differently from the
373 // terms of sections 15 and 16 of this License; or
374 //
375 // b) Requiring preservation of specified reasonable legal notices or
376 // author attributions in that material or in the Appropriate Legal
377 // Notices displayed by works containing it; or
378 //
379 // c) Prohibiting misrepresentation of the origin of that material, or
380 // requiring that modified versions of such material be marked in
381 // reasonable ways as different from the original version; or
382 //
383 // d) Limiting the use for publicity purposes of names of licensors or
384 // authors of the material; or
385 //
386 // e) Declining to grant rights under trademark law for use of some
387 // trade names, trademarks, or service marks; or
388 //
389 // f) Requiring indemnification of licensors and authors of that
390 // material by anyone who conveys the material (or modified versions of
391 // it) with contractual assumptions of liability to the recipient, for
392 // any liability that these contractual assumptions directly impose on
393 // those licensors and authors.
394 //
395 // All other non-permissive additional terms are considered "further
396 //restrictions" within the meaning of section 10. If the Program as you
397 //received it, or any part of it, contains a notice stating that it is
398 //governed by this License along with a term that is a further
399 //restriction, you may remove that term. If a license document contains
400 //a further restriction but permits relicensing or conveying under this
401 //License, you may add to a covered work material governed by the terms
402 //of that license document, provided that the further restriction does
403 //not survive such relicensing or conveying.
404 //
405 // If you add terms to a covered work in accord with this section, you
406 //must place, in the relevant source files, a statement of the
407 //additional terms that apply to those files, or a notice indicating
408 //where to find the applicable terms.
409 //
410 // Additional terms, permissive or non-permissive, may be stated in the
411 //form of a separately written license, or stated as exceptions;
412 //the above requirements apply either way.
413 //
414 // 8. Termination.
415 //
416 // You may not propagate or modify a covered work except as expressly
417 //provided under this License. Any attempt otherwise to propagate or
418 //modify it is void, and will automatically terminate your rights under
419 //this License (including any patent licenses granted under the third
420 //paragraph of section 11).
421 //
422 // However, if you cease all violation of this License, then your
423 //license from a particular copyright holder is reinstated (a)
424 //provisionally, unless and until the copyright holder explicitly and
425 //finally terminates your license, and (b) permanently, if the copyright
426 //holder fails to notify you of the violation by some reasonable means
427 //prior to 60 days after the cessation.
428 //
429 // Moreover, your license from a particular copyright holder is
430 //reinstated permanently if the copyright holder notifies you of the
431 //violation by some reasonable means, this is the first time you have
432 //received notice of violation of this License (for any work) from that
433 //copyright holder, and you cure the violation prior to 30 days after
434 //your receipt of the notice.
435 //
436 // Termination of your rights under this section does not terminate the
437 //licenses of parties who have received copies or rights from you under
438 //this License. If your rights have been terminated and not permanently
439 //reinstated, you do not qualify to receive new licenses for the same
440 //material under section 10.
441 //
442 // 9. Acceptance Not Required for Having Copies.
443 //
444 // You are not required to accept this License in order to receive or
445 //run a copy of the Program. Ancillary propagation of a covered work
446 //occurring solely as a consequence of using peer-to-peer transmission
447 //to receive a copy likewise does not require acceptance. However,
448 //nothing other than this License grants you permission to propagate or
449 //modify any covered work. These actions infringe copyright if you do
450 //not accept this License. Therefore, by modifying or propagating a
451 //covered work, you indicate your acceptance of this License to do so.
452 //
453 // 10. Automatic Licensing of Downstream Recipients.
454 //
455 // Each time you convey a covered work, the recipient automatically
456 //receives a license from the original licensors, to run, modify and
457 //propagate that work, subject to this License. You are not responsible
458 //for enforcing compliance by third parties with this License.
459 //
460 // An "entity transaction" is a transaction transferring control of an
461 //organization, or substantially all assets of one, or subdividing an
462 //organization, or merging organizations. If propagation of a covered
463 //work results from an entity transaction, each party to that
464 //transaction who receives a copy of the work also receives whatever
465 //licenses to the work the party's predecessor in interest had or could
466 //give under the previous paragraph, plus a right to possession of the
467 //Corresponding Source of the work from the predecessor in interest, if
468 //the predecessor has it or can get it with reasonable efforts.
469 //
470 // You may not impose any further restrictions on the exercise of the
471 //rights granted or affirmed under this License. For example, you may
472 //not impose a license fee, royalty, or other charge for exercise of
473 //rights granted under this License, and you may not initiate litigation
474 //(including a cross-claim or counterclaim in a lawsuit) alleging that
475 //any patent claim is infringed by making, using, selling, offering for
476 //sale, or importing the Program or any portion of it.
477 //
478 // 11. Patents.
479 //
480 // A "contributor" is a copyright holder who authorizes use under this
481 //License of the Program or a work on which the Program is based. The
482 //work thus licensed is called the contributor's "contributor version".
483 //
484 // A contributor's "essential patent claims" are all patent claims
485 //owned or controlled by the contributor, whether already acquired or
486 //hereafter acquired, that would be infringed by some manner, permitted
487 //by this License, of making, using, or selling its contributor version,
488 //but do not include claims that would be infringed only as a
489 //consequence of further modification of the contributor version. For
490 //purposes of this definition, "control" includes the right to grant
491 //patent sublicenses in a manner consistent with the requirements of
492 //this License.
493 //
494 // Each contributor grants you a non-exclusive, worldwide, royalty-free
495 //patent license under the contributor's essential patent claims, to
496 //make, use, sell, offer for sale, import and otherwise run, modify and
497 //propagate the contents of its contributor version.
498 //
499 // In the following three paragraphs, a "patent license" is any express
500 //agreement or commitment, however denominated, not to enforce a patent
501 //(such as an express permission to practice a patent or covenant not to
502 //sue for patent infringement). To "grant" such a patent license to a
503 //party means to make such an agreement or commitment not to enforce a
504 //patent against the party.
505 //
506 // If you convey a covered work, knowingly relying on a patent license,
507 //and the Corresponding Source of the work is not available for anyone
508 //to copy, free of charge and under the terms of this License, through a
509 //publicly available network server or other readily accessible means,
510 //then you must either (1) cause the Corresponding Source to be so
511 //available, or (2) arrange to deprive yourself of the benefit of the
512 //patent license for this particular work, or (3) arrange, in a manner
513 //consistent with the requirements of this License, to extend the patent
514 //license to downstream recipients. "Knowingly relying" means you have
515 //actual knowledge that, but for the patent license, your conveying the
516 //covered work in a country, or your recipient's use of the covered work
517 //in a country, would infringe one or more identifiable patents in that
518 //country that you have reason to believe are valid.
519 //
520 // If, pursuant to or in connection with a single transaction or
521 //arrangement, you convey, or propagate by procuring conveyance of, a
522 //covered work, and grant a patent license to some of the parties
523 //receiving the covered work authorizing them to use, propagate, modify
524 //or convey a specific copy of the covered work, then the patent license
525 //you grant is automatically extended to all recipients of the covered
526 //work and works based on it.
527 //
528 // A patent license is "discriminatory" if it does not include within
529 //the scope of its coverage, prohibits the exercise of, or is
530 //conditioned on the non-exercise of one or more of the rights that are
531 //specifically granted under this License. You may not convey a covered
532 //work if you are a party to an arrangement with a third party that is
533 //in the business of distributing software, under which you make payment
534 //to the third party based on the extent of your activity of conveying
535 //the work, and under which the third party grants, to any of the
536 //parties who would receive the covered work from you, a discriminatory
537 //patent license (a) in connection with copies of the covered work
538 //conveyed by you (or copies made from those copies), or (b) primarily
539 //for and in connection with specific products or compilations that
540 //contain the covered work, unless you entered into that arrangement,
541 //or that patent license was granted, prior to 28 March 2007.
542 //
543 // Nothing in this License shall be construed as excluding or limiting
544 //any implied license or other defenses to infringement that may
545 //otherwise be available to you under applicable patent law.
546 //
547 // 12. No Surrender of Others' Freedom.
548 //
549 // If conditions are imposed on you (whether by court order, agreement or
550 //otherwise) that contradict the conditions of this License, they do not
551 //excuse you from the conditions of this License. If you cannot convey a
552 //covered work so as to satisfy simultaneously your obligations under this
553 //License and any other pertinent obligations, then as a consequence you may
554 //not convey it at all. For example, if you agree to terms that obligate you
555 //to collect a royalty for further conveying from those to whom you convey
556 //the Program, the only way you could satisfy both those terms and this
557 //License would be to refrain entirely from conveying the Program.
558 //
559 // 13. Use with the GNU Affero General Public License.
560 //
561 // Notwithstanding any other provision of this License, you have
562 //permission to link or combine any covered work with a work licensed
563 //under version 3 of the GNU Affero General Public License into a single
564 //combined work, and to convey the resulting work. The terms of this
565 //License will continue to apply to the part which is the covered work,
566 //but the special requirements of the GNU Affero General Public License,
567 //section 13, concerning interaction through a network will apply to the
568 //combination as such.
569 //
570 // 14. Revised Versions of this License.
571 //
572 // The Free Software Foundation may publish revised and/or new versions of
573 //the GNU General Public License from time to time. Such new versions will
574 //be similar in spirit to the present version, but may differ in detail to
575 //address new problems or concerns.
576 //
577 // Each version is given a distinguishing version number. If the
578 //Program specifies that a certain numbered version of the GNU General
579 //Public License "or any later version" applies to it, you have the
580 //option of following the terms and conditions either of that numbered
581 //version or of any later version published by the Free Software
582 //Foundation. If the Program does not specify a version number of the
583 //GNU General Public License, you may choose any version ever published
584 //by the Free Software Foundation.
585 //
586 // If the Program specifies that a proxy can decide which future
587 //versions of the GNU General Public License can be used, that proxy's
588 //public statement of acceptance of a version permanently authorizes you
589 //to choose that version for the Program.
590 //
591 // Later license versions may give you additional or different
592 //permissions. However, no additional obligations are imposed on any
593 //author or copyright holder as a result of your choosing to follow a
594 //later version.
595 //
596 // 15. Disclaimer of Warranty.
597 //
598 // THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
599 //APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
600 //HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
601 //OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
602 //THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
603 //PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
604 //IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
605 //ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
606 //
607 // 16. Limitation of Liability.
608 //
609 // IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
610 //WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
611 //THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
612 //GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
613 //USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
614 //DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
615 //PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
616 //EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
617 //SUCH DAMAGES.
618 //
619 // 17. Interpretation of Sections 15 and 16.
620 //
621 // If the disclaimer of warranty and limitation of liability provided
622 //above cannot be given local legal effect according to their terms,
623 //reviewing courts shall apply local law that most closely approximates
624 //an absolute waiver of all civil liability in connection with the
625 //Program, unless a warranty or assumption of liability accompanies a
626 //copy of the Program in return for a fee.
627 //
628 // END OF TERMS AND CONDITIONS
629 //
630 // How to Apply These Terms to Your New Programs
631 //
632 // If you develop a new program, and you want it to be of the greatest
633 //possible use to the public, the best way to achieve this is to make it
634 //free software which everyone can redistribute and change under these terms.
635 //
636 // To do so, attach the following notices to the program. It is safest
637 //to attach them to the start of each source file to most effectively
638 //state the exclusion of warranty; and each file should have at least
639 //the "copyright" line and a pointer to where the full notice is found.
640 //
641 // <one line to give the program's name and a brief idea of what it does.>
642 // Copyright (C) <year> <name of author>
643 //
644 // This program is free software: you can redistribute it and/or modify
645 // it under the terms of the GNU General Public License as published by
646 // the Free Software Foundation, either version 3 of the License, or
647 // (at your option) any later version.
648 //
649 // This program is distributed in the hope that it will be useful,
650 // but WITHOUT ANY WARRANTY; without even the implied warranty of
651 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
652 // GNU General Public License for more details.
653 //
654 // You should have received a copy of the GNU General Public License
655 // along with this program. If not, see <http://www.gnu.org/licenses/>.
656 //
657 //Also add information on how to contact you by electronic and paper mail.
658 //
659 // If the program does terminal interaction, make it output a short
660 //notice like this when it starts in an interactive mode:
661 //
662 // <program> Copyright (C) <year> <name of author>
663 // This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
664 // This is free software, and you are welcome to redistribute it
665 // under certain conditions; type `show c' for details.
666 //
667 //The hypothetical commands `show w' and `show c' should show the appropriate
668 //parts of the General Public License. Of course, your program's commands
669 //might be different; for a GUI interface, you would use an "about box".
670 //
671 // You should also get your employer (if you work as a programmer) or school,
672 //if any, to sign a "copyright disclaimer" for the program, if necessary.
673 //For more information on this, and how to apply and follow the GNU GPL, see
674 //<http://www.gnu.org/licenses/>.
675 //
676 // The GNU General Public License does not permit incorporating your program
677 //into proprietary programs. If your program is a subroutine library, you
678 //may consider it more useful to permit linking proprietary applications with
679 //the library. If this is what you want to do, use the GNU Lesser General
680 //Public License instead of this License. But first, please read
681 //<http://www.gnu.org/philosophy/why-not-lgpl.html>.
682 //-------------------------------------------------------------------------------------------------
683 //--------------------------------------------------------------------------------
684 #define MODULE_CRCHASHFUNCS
685
686 #include <assert.h>
687 #include <stdio.h>
688 #include <string.h>
689
690 #include "crchashfuncs.h"
691
692
693 //This is the data table used to generate CRC-32 values. The code to
694 //generate these values isn't reproduced here (it was discarded after
695 //the values were generated), but this code originally came from a
696 //web page by Richard A. Ellingson. I do not at this time understand
697 //the math behind the generation or usage of this table.
698 static const unsigned CRCHASHFUNCS_crc32tab[256] =
699 {
700 /* [000] */ 0x00000000,
701 /* [001] */ 0x77073096,
702 /* [002] */ 0xEE0E612C,
703 /* [003] */ 0x990951BA,
704 /* [004] */ 0x076DC419,
705 /* [005] */ 0x706AF48F,
706 /* [006] */ 0xE963A535,
707 /* [007] */ 0x9E6495A3,
708 /* [008] */ 0x0EDB8832,
709 /* [009] */ 0x79DCB8A4,
710 /* [010] */ 0xE0D5E91E,
711 /* [011] */ 0x97D2D988,
712 /* [012] */ 0x09B64C2B,
713 /* [013] */ 0x7EB17CBD,
714 /* [014] */ 0xE7B82D07,
715 /* [015] */ 0x90BF1D91,
716 /* [016] */ 0x1DB71064,
717 /* [017] */ 0x6AB020F2,
718 /* [018] */ 0xF3B97148,
719 /* [019] */ 0x84BE41DE,
720 /* [020] */ 0x1ADAD47D,
721 /* [021] */ 0x6DDDE4EB,
722 /* [022] */ 0xF4D4B551,
723 /* [023] */ 0x83D385C7,
724 /* [024] */ 0x136C9856,
725 /* [025] */ 0x646BA8C0,
726 /* [026] */ 0xFD62F97A,
727 /* [027] */ 0x8A65C9EC,
728 /* [028] */ 0x14015C4F,
729 /* [029] */ 0x63066CD9,
730 /* [030] */ 0xFA0F3D63,
731 /* [031] */ 0x8D080DF5,
732 /* [032] */ 0x3B6E20C8,
733 /* [033] */ 0x4C69105E,
734 /* [034] */ 0xD56041E4,
735 /* [035] */ 0xA2677172,
736 /* [036] */ 0x3C03E4D1,
737 /* [037] */ 0x4B04D447,
738 /* [038] */ 0xD20D85FD,
739 /* [039] */ 0xA50AB56B,
740 /* [040] */ 0x35B5A8FA,
741 /* [041] */ 0x42B2986C,
742 /* [042] */ 0xDBBBC9D6,
743 /* [043] */ 0xACBCF940,
744 /* [044] */ 0x32D86CE3,
745 /* [045] */ 0x45DF5C75,
746 /* [046] */ 0xDCD60DCF,
747 /* [047] */ 0xABD13D59,
748 /* [048] */ 0x26D930AC,
749 /* [049] */ 0x51DE003A,
750 /* [050] */ 0xC8D75180,
751 /* [051] */ 0xBFD06116,
752 /* [052] */ 0x21B4F4B5,
753 /* [053] */ 0x56B3C423,
754 /* [054] */ 0xCFBA9599,
755 /* [055] */ 0xB8BDA50F,
756 /* [056] */ 0x2802B89E,
757 /* [057] */ 0x5F058808,
758 /* [058] */ 0xC60CD9B2,
759 /* [059] */ 0xB10BE924,
760 /* [060] */ 0x2F6F7C87,
761 /* [061] */ 0x58684C11,
762 /* [062] */ 0xC1611DAB,
763 /* [063] */ 0xB6662D3D,
764 /* [064] */ 0x76DC4190,
765 /* [065] */ 0x01DB7106,
766 /* [066] */ 0x98D220BC,
767 /* [067] */ 0xEFD5102A,
768 /* [068] */ 0x71B18589,
769 /* [069] */ 0x06B6B51F,
770 /* [070] */ 0x9FBFE4A5,
771 /* [071] */ 0xE8B8D433,
772 /* [072] */ 0x7807C9A2,
773 /* [073] */ 0x0F00F934,
774 /* [074] */ 0x9609A88E,
775 /* [075] */ 0xE10E9818,
776 /* [076] */ 0x7F6A0DBB,
777 /* [077] */ 0x086D3D2D,
778 /* [078] */ 0x91646C97,
779 /* [079] */ 0xE6635C01,
780 /* [080] */ 0x6B6B51F4,
781 /* [081] */ 0x1C6C6162,
782 /* [082] */ 0x856530D8,
783 /* [083] */ 0xF262004E,
784 /* [084] */ 0x6C0695ED,
785 /* [085] */ 0x1B01A57B,
786 /* [086] */ 0x8208F4C1,
787 /* [087] */ 0xF50FC457,
788 /* [088] */ 0x65B0D9C6,
789 /* [089] */ 0x12B7E950,
790 /* [090] */ 0x8BBEB8EA,
791 /* [091] */ 0xFCB9887C,
792 /* [092] */ 0x62DD1DDF,
793 /* [093] */ 0x15DA2D49,
794 /* [094] */ 0x8CD37CF3,
795 /* [095] */ 0xFBD44C65,
796 /* [096] */ 0x4DB26158,
797 /* [097] */ 0x3AB551CE,
798 /* [098] */ 0xA3BC0074,
799 /* [099] */ 0xD4BB30E2,
800 /* [100] */ 0x4ADFA541,
801 /* [101] */ 0x3DD895D7,
802 /* [102] */ 0xA4D1C46D,
803 /* [103] */ 0xD3D6F4FB,
804 /* [104] */ 0x4369E96A,
805 /* [105] */ 0x346ED9FC,
806 /* [106] */ 0xAD678846,
807 /* [107] */ 0xDA60B8D0,
808 /* [108] */ 0x44042D73,
809 /* [109] */ 0x33031DE5,
810 /* [110] */ 0xAA0A4C5F,
811 /* [111] */ 0xDD0D7CC9,
812 /* [112] */ 0x5005713C,
813 /* [113] */ 0x270241AA,
814 /* [114] */ 0xBE0B1010,
815 /* [115] */ 0xC90C2086,
816 /* [116] */ 0x5768B525,
817 /* [117] */ 0x206F85B3,
818 /* [118] */ 0xB966D409,
819 /* [119] */ 0xCE61E49F,
820 /* [120] */ 0x5EDEF90E,
821 /* [121] */ 0x29D9C998,
822 /* [122] */ 0xB0D09822,
823 /* [123] */ 0xC7D7A8B4,
824 /* [124] */ 0x59B33D17,
825 /* [125] */ 0x2EB40D81,
826 /* [126] */ 0xB7BD5C3B,
827 /* [127] */ 0xC0BA6CAD,
828 /* [128] */ 0xEDB88320,
829 /* [129] */ 0x9ABFB3B6,
830 /* [130] */ 0x03B6E20C,
831 /* [131] */ 0x74B1D29A,
832 /* [132] */ 0xEAD54739,
833 /* [133] */ 0x9DD277AF,
834 /* [134] */ 0x04DB2615,
835 /* [135] */ 0x73DC1683,
836 /* [136] */ 0xE3630B12,
837 /* [137] */ 0x94643B84,
838 /* [138] */ 0x0D6D6A3E,
839 /* [139] */ 0x7A6A5AA8,
840 /* [140] */ 0xE40ECF0B,
841 /* [141] */ 0x9309FF9D,
842 /* [142] */ 0x0A00AE27,
843 /* [143] */ 0x7D079EB1,
844 /* [144] */ 0xF00F9344,
845 /* [145] */ 0x8708A3D2,
846 /* [146] */ 0x1E01F268,
847 /* [147] */ 0x6906C2FE,
848 /* [148] */ 0xF762575D,
849 /* [149] */ 0x806567CB,
850 /* [150] */ 0x196C3671,
851 /* [151] */ 0x6E6B06E7,
852 /* [152] */ 0xFED41B76,
853 /* [153] */ 0x89D32BE0,
854 /* [154] */ 0x10DA7A5A,
855 /* [155] */ 0x67DD4ACC,
856 /* [156] */ 0xF9B9DF6F,
857 /* [157] */ 0x8EBEEFF9,
858 /* [158] */ 0x17B7BE43,
859 /* [159] */ 0x60B08ED5,
860 /* [160] */ 0xD6D6A3E8,
861 /* [161] */ 0xA1D1937E,
862 /* [162] */ 0x38D8C2C4,
863 /* [163] */ 0x4FDFF252,
864 /* [164] */ 0xD1BB67F1,
865 /* [165] */ 0xA6BC5767,
866 /* [166] */ 0x3FB506DD,
867 /* [167] */ 0x48B2364B,
868 /* [168] */ 0xD80D2BDA,
869 /* [169] */ 0xAF0A1B4C,
870 /* [170] */ 0x36034AF6,
871 /* [171] */ 0x41047A60,
872 /* [172] */ 0xDF60EFC3,
873 /* [173] */ 0xA867DF55,
874 /* [174] */ 0x316E8EEF,
875 /* [175] */ 0x4669BE79,
876 /* [176] */ 0xCB61B38C,
877 /* [177] */ 0xBC66831A,
878 /* [178] */ 0x256FD2A0,
879 /* [179] */ 0x5268E236,
880 /* [180] */ 0xCC0C7795,
881 /* [181] */ 0xBB0B4703,
882 /* [182] */ 0x220216B9,
883 /* [183] */ 0x5505262F,
884 /* [184] */ 0xC5BA3BBE,
885 /* [185] */ 0xB2BD0B28,
886 /* [186] */ 0x2BB45A92,
887 /* [187] */ 0x5CB36A04,
888 /* [188] */ 0xC2D7FFA7,
889 /* [189] */ 0xB5D0CF31,
890 /* [190] */ 0x2CD99E8B,
891 /* [191] */ 0x5BDEAE1D,
892 /* [192] */ 0x9B64C2B0,
893 /* [193] */ 0xEC63F226,
894 /* [194] */ 0x756AA39C,
895 /* [195] */ 0x026D930A,
896 /* [196] */ 0x9C0906A9,
897 /* [197] */ 0xEB0E363F,
898 /* [198] */ 0x72076785,
899 /* [199] */ 0x05005713,
900 /* [200] */ 0x95BF4A82,
901 /* [201] */ 0xE2B87A14,
902 /* [202] */ 0x7BB12BAE,
903 /* [203] */ 0x0CB61B38,
904 /* [204] */ 0x92D28E9B,
905 /* [205] */ 0xE5D5BE0D,
906 /* [206] */ 0x7CDCEFB7,
907 /* [207] */ 0x0BDBDF21,
908 /* [208] */ 0x86D3D2D4,
909 /* [209] */ 0xF1D4E242,
910 /* [210] */ 0x68DDB3F8,
911 /* [211] */ 0x1FDA836E,
912 /* [212] */ 0x81BE16CD,
913 /* [213] */ 0xF6B9265B,
914 /* [214] */ 0x6FB077E1,
915 /* [215] */ 0x18B74777,
916 /* [216] */ 0x88085AE6,
917 /* [217] */ 0xFF0F6A70,
918 /* [218] */ 0x66063BCA,
919 /* [219] */ 0x11010B5C,
920 /* [220] */ 0x8F659EFF,
921 /* [221] */ 0xF862AE69,
922 /* [222] */ 0x616BFFD3,
923 /* [223] */ 0x166CCF45,
924 /* [224] */ 0xA00AE278,
925 /* [225] */ 0xD70DD2EE,
926 /* [226] */ 0x4E048354,
927 /* [227] */ 0x3903B3C2,
928 /* [228] */ 0xA7672661,
929 /* [229] */ 0xD06016F7,
930 /* [230] */ 0x4969474D,
931 /* [231] */ 0x3E6E77DB,
932 /* [232] */ 0xAED16A4A,
933 /* [233] */ 0xD9D65ADC,
934 /* [234] */ 0x40DF0B66,
935 /* [235] */ 0x37D83BF0,
936 /* [236] */ 0xA9BCAE53,
937 /* [237] */ 0xDEBB9EC5,
938 /* [238] */ 0x47B2CF7F,
939 /* [239] */ 0x30B5FFE9,
940 /* [240] */ 0xBDBDF21C,
941 /* [241] */ 0xCABAC28A,
942 /* [242] */ 0x53B39330,
943 /* [243] */ 0x24B4A3A6,
944 /* [244] */ 0xBAD03605,
945 /* [245] */ 0xCDD70693,
946 /* [246] */ 0x54DE5729,
947 /* [247] */ 0x23D967BF,
948 /* [248] */ 0xB3667A2E,
949 /* [249] */ 0xC4614AB8,
950 /* [250] */ 0x5D681B02,
951 /* [251] */ 0x2A6F2B94,
952 /* [252] */ 0xB40BBE37,
953 /* [253] */ 0xC30C8EA1,
954 /* [254] */ 0x5A05DF1B,
955 /* [255] */ 0x2D02EF8D
956 };
957
958 //It is known that the XOR of all of the table values above is 0,
959 //and that the sum is 0xFFFFFF80. This is used to check the table
960 //for corruption on demand.
961 #define CRCHASHFUNCS_CRC32TABLE_XOR (0x00000000)
962 #define CRCHASHFUNCS_CRC32TABLE_SUM (0xFFFFFF80)
963
964
965 //Rotates an unsigned int left with wraparound.
966 static unsigned CRCHASHFUNCS_Crc32RotateLeftWithWrap(unsigned arg)
967 {
968 if (arg & 0x80000000)
969 {
970 arg <<= 1;
971 arg |= (unsigned)1;
972 }
973 else
974 {
975 arg <<= 1;
976 arg &= 0xFFFFFFFE;
977 }
978
979 return(arg);
980 }
981
982
983 //Appears to swap the bits in a data value, bit 0 for bit 7, bit 1
984 //for bit 6, etc. Obtained from the Internet (Richard A. Ellingson).
985 static unsigned CRCHASHFUNCS_Crc32Reflect(unsigned ref,
986 unsigned char ch)
987 {
988 unsigned i;
989 unsigned value;
990
991 value = 0;
992
993 for (i=1; i<((unsigned)(ch+1)); i++)
994 {
995 if (ref & 1)
996 {
997 value |= (1 << (ch-i));
998 }
999 ref >>= 1;
1000 }
1001
1002 return(value);
1003 }
1004
1005
1006 //Returns !=0 if the internal table is alright.
1007 int CRCHASHFUNCS_Crc32TableCheck(void)
1008 {
1009 int i;
1010 unsigned xor_val;
1011 unsigned sum_val;
1012
1013 xor_val = sum_val = 0;
1014
1015 for (i=0; i<256; i++)
1016 {
1017 xor_val ^= CRCHASHFUNCS_crc32tab[i];
1018 sum_val += CRCHASHFUNCS_crc32tab[i];
1019 }
1020
1021 return((xor_val == CRCHASHFUNCS_CRC32TABLE_XOR) &&
1022 (sum_val == CRCHASHFUNCS_CRC32TABLE_SUM));
1023 }
1024
1025
1026 //Initializes a CRC state struct. This will be added to, the CRC will be
1027 //extracted, and the data structure will finally be closed.
1028 void CRCHASHFUNCS_Crc32StateStructOpen(struct CRCHASHFUNCS_Crc32StateStruct *arg)
1029 {
1030 arg->crc = 0xFFFFFFFF;
1031 }
1032
1033
1034 //Adds data to the data structure.
1035 void CRCHASHFUNCS_Crc32StateStructAddData(struct CRCHASHFUNCS_Crc32StateStruct *arg,
1036 void *data,
1037 unsigned len)
1038 {
1039 assert(arg != NULL);
1040 assert(data != NULL);
1041
1042 while (len--)
1043 {
1044 arg->crc = (arg->crc >> 8) ^ CRCHASHFUNCS_crc32tab[((arg->crc & 0xFF) ^ *((unsigned char *)data)) & 0xFF];
1045 data = (unsigned char *)data + 1;
1046 }
1047 }
1048
1049
1050 unsigned CRCHASHFUNCS_Crc32Extract(struct CRCHASHFUNCS_Crc32StateStruct *arg)
1051 {
1052 assert(arg != NULL);
1053
1054 return(arg->crc ^ 0xFFFFFFFF);
1055 }
1056
1057
1058 void CRCHASHFUNCS_Crc32StateStructClose(struct CRCHASHFUNCS_Crc32StateStruct *arg)
1059 {
1060 assert(arg != NULL);
1061
1062 //Do nothing at this time.
1063 }
1064
1065
1066 //Returns version control string for file.
1067 //
1068 const char *CRCHASHFUNCS_cvcinfo(void)
1069 {
1070 return ("$Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/c_datd/crchashfuncs.c,v 1.3 2001/07/26 21:41:21 dtashley Exp $");
1071 }
1072
1073
1074 //Returns version control string for associated .H file.
1075 //
1076 const char *CRCHASHFUNCS_hvcinfo(void)
1077 {
1078 return (CRCHASHFUNCS_H_VERSION);
1079 }
1080
1081
1082 // $Log: crchashfuncs.c,v $
1083 // Revision 1.3 2001/07/26 21:41:21 dtashley
1084 // Completion of CRC32 utility, and the CRCHASHFUNCS module.
1085 //
1086 // Revision 1.2 2001/07/26 05:01:49 dtashley
1087 // Keyword expansion corrected.
1088 //
1089 // End of CRCHASHFUNCS.C.

dashley@gmail.com
ViewVC Help
Powered by ViewVC 1.1.25