/[dtapublic]/to_be_filed/webprojs/fboprime/sw/phplib/datefunc.inc
ViewVC logotype

Contents of /to_be_filed/webprojs/fboprime/sw/phplib/datefunc.inc

Parent Directory Parent Directory | Revision Log Revision Log


Revision 31 - (show annotations) (download)
Sat Oct 8 18:44:20 2016 UTC (7 years, 5 months ago) by dashley
File size: 67796 byte(s)
Initial commit.
1 <?php
2 //$Header: /home/dashley/cvsrep/e3ft_gpl01/e3ft_gpl01/webprojs/fboprime/sw/phplib/datefunc.inc,v 1.10 2006/08/01 23:14:06 dashley Exp $
3 //********************************************************************************
4 //Copyright (C)2006 David T. Ashley
5 //********************************************************************************
6 //This program or source file is free software; you can redistribute it and/or
7 //modify it under the terms of the GNU General Public License as published by
8 //the Free Software Foundation; either version 2 of the License, or (at your
9 //option) any later version.
10 //
11 //This program or source file is distributed in the hope that it will
12 //be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
13 //MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 //GNU General Public License for more details.
15 //
16 //You may have received a copy of the GNU General Public License
17 //along with this program; if not, write to the Free Software
18 //Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 //********************************************************************************
20 //Dave Ashley, 04/06
21 //-------------------------------------------------------------------------------------------------
22 //Copyright 2006 David T. Ashley
23 //-------------------------------------------------------------------------------------------------
24 //This source code and any program in which it is compiled/used is provided under the GNU GENERAL
25 //PUBLIC LICENSE, Version 3, full license text below.
26 //-------------------------------------------------------------------------------------------------
27 // GNU GENERAL PUBLIC LICENSE
28 // Version 3, 29 June 2007
29 //
30 // Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
31 // Everyone is permitted to copy and distribute verbatim copies
32 // of this license document, but changing it is not allowed.
33 //
34 // Preamble
35 //
36 // The GNU General Public License is a free, copyleft license for
37 //software and other kinds of works.
38 //
39 // The licenses for most software and other practical works are designed
40 //to take away your freedom to share and change the works. By contrast,
41 //the GNU General Public License is intended to guarantee your freedom to
42 //share and change all versions of a program--to make sure it remains free
43 //software for all its users. We, the Free Software Foundation, use the
44 //GNU General Public License for most of our software; it applies also to
45 //any other work released this way by its authors. You can apply it to
46 //your programs, too.
47 //
48 // When we speak of free software, we are referring to freedom, not
49 //price. Our General Public Licenses are designed to make sure that you
50 //have the freedom to distribute copies of free software (and charge for
51 //them if you wish), that you receive source code or can get it if you
52 //want it, that you can change the software or use pieces of it in new
53 //free programs, and that you know you can do these things.
54 //
55 // To protect your rights, we need to prevent others from denying you
56 //these rights or asking you to surrender the rights. Therefore, you have
57 //certain responsibilities if you distribute copies of the software, or if
58 //you modify it: responsibilities to respect the freedom of others.
59 //
60 // For example, if you distribute copies of such a program, whether
61 //gratis or for a fee, you must pass on to the recipients the same
62 //freedoms that you received. You must make sure that they, too, receive
63 //or can get the source code. And you must show them these terms so they
64 //know their rights.
65 //
66 // Developers that use the GNU GPL protect your rights with two steps:
67 //(1) assert copyright on the software, and (2) offer you this License
68 //giving you legal permission to copy, distribute and/or modify it.
69 //
70 // For the developers' and authors' protection, the GPL clearly explains
71 //that there is no warranty for this free software. For both users' and
72 //authors' sake, the GPL requires that modified versions be marked as
73 //changed, so that their problems will not be attributed erroneously to
74 //authors of previous versions.
75 //
76 // Some devices are designed to deny users access to install or run
77 //modified versions of the software inside them, although the manufacturer
78 //can do so. This is fundamentally incompatible with the aim of
79 //protecting users' freedom to change the software. The systematic
80 //pattern of such abuse occurs in the area of products for individuals to
81 //use, which is precisely where it is most unacceptable. Therefore, we
82 //have designed this version of the GPL to prohibit the practice for those
83 //products. If such problems arise substantially in other domains, we
84 //stand ready to extend this provision to those domains in future versions
85 //of the GPL, as needed to protect the freedom of users.
86 //
87 // Finally, every program is threatened constantly by software patents.
88 //States should not allow patents to restrict development and use of
89 //software on general-purpose computers, but in those that do, we wish to
90 //avoid the special danger that patents applied to a free program could
91 //make it effectively proprietary. To prevent this, the GPL assures that
92 //patents cannot be used to render the program non-free.
93 //
94 // The precise terms and conditions for copying, distribution and
95 //modification follow.
96 //
97 // TERMS AND CONDITIONS
98 //
99 // 0. Definitions.
100 //
101 // "This License" refers to version 3 of the GNU General Public License.
102 //
103 // "Copyright" also means copyright-like laws that apply to other kinds of
104 //works, such as semiconductor masks.
105 //
106 // "The Program" refers to any copyrightable work licensed under this
107 //License. Each licensee is addressed as "you". "Licensees" and
108 //"recipients" may be individuals or organizations.
109 //
110 // To "modify" a work means to copy from or adapt all or part of the work
111 //in a fashion requiring copyright permission, other than the making of an
112 //exact copy. The resulting work is called a "modified version" of the
113 //earlier work or a work "based on" the earlier work.
114 //
115 // A "covered work" means either the unmodified Program or a work based
116 //on the Program.
117 //
118 // To "propagate" a work means to do anything with it that, without
119 //permission, would make you directly or secondarily liable for
120 //infringement under applicable copyright law, except executing it on a
121 //computer or modifying a private copy. Propagation includes copying,
122 //distribution (with or without modification), making available to the
123 //public, and in some countries other activities as well.
124 //
125 // To "convey" a work means any kind of propagation that enables other
126 //parties to make or receive copies. Mere interaction with a user through
127 //a computer network, with no transfer of a copy, is not conveying.
128 //
129 // An interactive user interface displays "Appropriate Legal Notices"
130 //to the extent that it includes a convenient and prominently visible
131 //feature that (1) displays an appropriate copyright notice, and (2)
132 //tells the user that there is no warranty for the work (except to the
133 //extent that warranties are provided), that licensees may convey the
134 //work under this License, and how to view a copy of this License. If
135 //the interface presents a list of user commands or options, such as a
136 //menu, a prominent item in the list meets this criterion.
137 //
138 // 1. Source Code.
139 //
140 // The "source code" for a work means the preferred form of the work
141 //for making modifications to it. "Object code" means any non-source
142 //form of a work.
143 //
144 // A "Standard Interface" means an interface that either is an official
145 //standard defined by a recognized standards body, or, in the case of
146 //interfaces specified for a particular programming language, one that
147 //is widely used among developers working in that language.
148 //
149 // The "System Libraries" of an executable work include anything, other
150 //than the work as a whole, that (a) is included in the normal form of
151 //packaging a Major Component, but which is not part of that Major
152 //Component, and (b) serves only to enable use of the work with that
153 //Major Component, or to implement a Standard Interface for which an
154 //implementation is available to the public in source code form. A
155 //"Major Component", in this context, means a major essential component
156 //(kernel, window system, and so on) of the specific operating system
157 //(if any) on which the executable work runs, or a compiler used to
158 //produce the work, or an object code interpreter used to run it.
159 //
160 // The "Corresponding Source" for a work in object code form means all
161 //the source code needed to generate, install, and (for an executable
162 //work) run the object code and to modify the work, including scripts to
163 //control those activities. However, it does not include the work's
164 //System Libraries, or general-purpose tools or generally available free
165 //programs which are used unmodified in performing those activities but
166 //which are not part of the work. For example, Corresponding Source
167 //includes interface definition files associated with source files for
168 //the work, and the source code for shared libraries and dynamically
169 //linked subprograms that the work is specifically designed to require,
170 //such as by intimate data communication or control flow between those
171 //subprograms and other parts of the work.
172 //
173 // The Corresponding Source need not include anything that users
174 //can regenerate automatically from other parts of the Corresponding
175 //Source.
176 //
177 // The Corresponding Source for a work in source code form is that
178 //same work.
179 //
180 // 2. Basic Permissions.
181 //
182 // All rights granted under this License are granted for the term of
183 //copyright on the Program, and are irrevocable provided the stated
184 //conditions are met. This License explicitly affirms your unlimited
185 //permission to run the unmodified Program. The output from running a
186 //covered work is covered by this License only if the output, given its
187 //content, constitutes a covered work. This License acknowledges your
188 //rights of fair use or other equivalent, as provided by copyright law.
189 //
190 // You may make, run and propagate covered works that you do not
191 //convey, without conditions so long as your license otherwise remains
192 //in force. You may convey covered works to others for the sole purpose
193 //of having them make modifications exclusively for you, or provide you
194 //with facilities for running those works, provided that you comply with
195 //the terms of this License in conveying all material for which you do
196 //not control copyright. Those thus making or running the covered works
197 //for you must do so exclusively on your behalf, under your direction
198 //and control, on terms that prohibit them from making any copies of
199 //your copyrighted material outside their relationship with you.
200 //
201 // Conveying under any other circumstances is permitted solely under
202 //the conditions stated below. Sublicensing is not allowed; section 10
203 //makes it unnecessary.
204 //
205 // 3. Protecting Users' Legal Rights From Anti-Circumvention Law.
206 //
207 // No covered work shall be deemed part of an effective technological
208 //measure under any applicable law fulfilling obligations under article
209 //11 of the WIPO copyright treaty adopted on 20 December 1996, or
210 //similar laws prohibiting or restricting circumvention of such
211 //measures.
212 //
213 // When you convey a covered work, you waive any legal power to forbid
214 //circumvention of technological measures to the extent such circumvention
215 //is effected by exercising rights under this License with respect to
216 //the covered work, and you disclaim any intention to limit operation or
217 //modification of the work as a means of enforcing, against the work's
218 //users, your or third parties' legal rights to forbid circumvention of
219 //technological measures.
220 //
221 // 4. Conveying Verbatim Copies.
222 //
223 // You may convey verbatim copies of the Program's source code as you
224 //receive it, in any medium, provided that you conspicuously and
225 //appropriately publish on each copy an appropriate copyright notice;
226 //keep intact all notices stating that this License and any
227 //non-permissive terms added in accord with section 7 apply to the code;
228 //keep intact all notices of the absence of any warranty; and give all
229 //recipients a copy of this License along with the Program.
230 //
231 // You may charge any price or no price for each copy that you convey,
232 //and you may offer support or warranty protection for a fee.
233 //
234 // 5. Conveying Modified Source Versions.
235 //
236 // You may convey a work based on the Program, or the modifications to
237 //produce it from the Program, in the form of source code under the
238 //terms of section 4, provided that you also meet all of these conditions:
239 //
240 // a) The work must carry prominent notices stating that you modified
241 // it, and giving a relevant date.
242 //
243 // b) The work must carry prominent notices stating that it is
244 // released under this License and any conditions added under section
245 // 7. This requirement modifies the requirement in section 4 to
246 // "keep intact all notices".
247 //
248 // c) You must license the entire work, as a whole, under this
249 // License to anyone who comes into possession of a copy. This
250 // License will therefore apply, along with any applicable section 7
251 // additional terms, to the whole of the work, and all its parts,
252 // regardless of how they are packaged. This License gives no
253 // permission to license the work in any other way, but it does not
254 // invalidate such permission if you have separately received it.
255 //
256 // d) If the work has interactive user interfaces, each must display
257 // Appropriate Legal Notices; however, if the Program has interactive
258 // interfaces that do not display Appropriate Legal Notices, your
259 // work need not make them do so.
260 //
261 // A compilation of a covered work with other separate and independent
262 //works, which are not by their nature extensions of the covered work,
263 //and which are not combined with it such as to form a larger program,
264 //in or on a volume of a storage or distribution medium, is called an
265 //"aggregate" if the compilation and its resulting copyright are not
266 //used to limit the access or legal rights of the compilation's users
267 //beyond what the individual works permit. Inclusion of a covered work
268 //in an aggregate does not cause this License to apply to the other
269 //parts of the aggregate.
270 //
271 // 6. Conveying Non-Source Forms.
272 //
273 // You may convey a covered work in object code form under the terms
274 //of sections 4 and 5, provided that you also convey the
275 //machine-readable Corresponding Source under the terms of this License,
276 //in one of these ways:
277 //
278 // a) Convey the object code in, or embodied in, a physical product
279 // (including a physical distribution medium), accompanied by the
280 // Corresponding Source fixed on a durable physical medium
281 // customarily used for software interchange.
282 //
283 // b) Convey the object code in, or embodied in, a physical product
284 // (including a physical distribution medium), accompanied by a
285 // written offer, valid for at least three years and valid for as
286 // long as you offer spare parts or customer support for that product
287 // model, to give anyone who possesses the object code either (1) a
288 // copy of the Corresponding Source for all the software in the
289 // product that is covered by this License, on a durable physical
290 // medium customarily used for software interchange, for a price no
291 // more than your reasonable cost of physically performing this
292 // conveying of source, or (2) access to copy the
293 // Corresponding Source from a network server at no charge.
294 //
295 // c) Convey individual copies of the object code with a copy of the
296 // written offer to provide the Corresponding Source. This
297 // alternative is allowed only occasionally and noncommercially, and
298 // only if you received the object code with such an offer, in accord
299 // with subsection 6b.
300 //
301 // d) Convey the object code by offering access from a designated
302 // place (gratis or for a charge), and offer equivalent access to the
303 // Corresponding Source in the same way through the same place at no
304 // further charge. You need not require recipients to copy the
305 // Corresponding Source along with the object code. If the place to
306 // copy the object code is a network server, the Corresponding Source
307 // may be on a different server (operated by you or a third party)
308 // that supports equivalent copying facilities, provided you maintain
309 // clear directions next to the object code saying where to find the
310 // Corresponding Source. Regardless of what server hosts the
311 // Corresponding Source, you remain obligated to ensure that it is
312 // available for as long as needed to satisfy these requirements.
313 //
314 // e) Convey the object code using peer-to-peer transmission, provided
315 // you inform other peers where the object code and Corresponding
316 // Source of the work are being offered to the general public at no
317 // charge under subsection 6d.
318 //
319 // A separable portion of the object code, whose source code is excluded
320 //from the Corresponding Source as a System Library, need not be
321 //included in conveying the object code work.
322 //
323 // A "User Product" is either (1) a "consumer product", which means any
324 //tangible personal property which is normally used for personal, family,
325 //or household purposes, or (2) anything designed or sold for incorporation
326 //into a dwelling. In determining whether a product is a consumer product,
327 //doubtful cases shall be resolved in favor of coverage. For a particular
328 //product received by a particular user, "normally used" refers to a
329 //typical or common use of that class of product, regardless of the status
330 //of the particular user or of the way in which the particular user
331 //actually uses, or expects or is expected to use, the product. A product
332 //is a consumer product regardless of whether the product has substantial
333 //commercial, industrial or non-consumer uses, unless such uses represent
334 //the only significant mode of use of the product.
335 //
336 // "Installation Information" for a User Product means any methods,
337 //procedures, authorization keys, or other information required to install
338 //and execute modified versions of a covered work in that User Product from
339 //a modified version of its Corresponding Source. The information must
340 //suffice to ensure that the continued functioning of the modified object
341 //code is in no case prevented or interfered with solely because
342 //modification has been made.
343 //
344 // If you convey an object code work under this section in, or with, or
345 //specifically for use in, a User Product, and the conveying occurs as
346 //part of a transaction in which the right of possession and use of the
347 //User Product is transferred to the recipient in perpetuity or for a
348 //fixed term (regardless of how the transaction is characterized), the
349 //Corresponding Source conveyed under this section must be accompanied
350 //by the Installation Information. But this requirement does not apply
351 //if neither you nor any third party retains the ability to install
352 //modified object code on the User Product (for example, the work has
353 //been installed in ROM).
354 //
355 // The requirement to provide Installation Information does not include a
356 //requirement to continue to provide support service, warranty, or updates
357 //for a work that has been modified or installed by the recipient, or for
358 //the User Product in which it has been modified or installed. Access to a
359 //network may be denied when the modification itself materially and
360 //adversely affects the operation of the network or violates the rules and
361 //protocols for communication across the network.
362 //
363 // Corresponding Source conveyed, and Installation Information provided,
364 //in accord with this section must be in a format that is publicly
365 //documented (and with an implementation available to the public in
366 //source code form), and must require no special password or key for
367 //unpacking, reading or copying.
368 //
369 // 7. Additional Terms.
370 //
371 // "Additional permissions" are terms that supplement the terms of this
372 //License by making exceptions from one or more of its conditions.
373 //Additional permissions that are applicable to the entire Program shall
374 //be treated as though they were included in this License, to the extent
375 //that they are valid under applicable law. If additional permissions
376 //apply only to part of the Program, that part may be used separately
377 //under those permissions, but the entire Program remains governed by
378 //this License without regard to the additional permissions.
379 //
380 // When you convey a copy of a covered work, you may at your option
381 //remove any additional permissions from that copy, or from any part of
382 //it. (Additional permissions may be written to require their own
383 //removal in certain cases when you modify the work.) You may place
384 //additional permissions on material, added by you to a covered work,
385 //for which you have or can give appropriate copyright permission.
386 //
387 // Notwithstanding any other provision of this License, for material you
388 //add to a covered work, you may (if authorized by the copyright holders of
389 //that material) supplement the terms of this License with terms:
390 //
391 // a) Disclaiming warranty or limiting liability differently from the
392 // terms of sections 15 and 16 of this License; or
393 //
394 // b) Requiring preservation of specified reasonable legal notices or
395 // author attributions in that material or in the Appropriate Legal
396 // Notices displayed by works containing it; or
397 //
398 // c) Prohibiting misrepresentation of the origin of that material, or
399 // requiring that modified versions of such material be marked in
400 // reasonable ways as different from the original version; or
401 //
402 // d) Limiting the use for publicity purposes of names of licensors or
403 // authors of the material; or
404 //
405 // e) Declining to grant rights under trademark law for use of some
406 // trade names, trademarks, or service marks; or
407 //
408 // f) Requiring indemnification of licensors and authors of that
409 // material by anyone who conveys the material (or modified versions of
410 // it) with contractual assumptions of liability to the recipient, for
411 // any liability that these contractual assumptions directly impose on
412 // those licensors and authors.
413 //
414 // All other non-permissive additional terms are considered "further
415 //restrictions" within the meaning of section 10. If the Program as you
416 //received it, or any part of it, contains a notice stating that it is
417 //governed by this License along with a term that is a further
418 //restriction, you may remove that term. If a license document contains
419 //a further restriction but permits relicensing or conveying under this
420 //License, you may add to a covered work material governed by the terms
421 //of that license document, provided that the further restriction does
422 //not survive such relicensing or conveying.
423 //
424 // If you add terms to a covered work in accord with this section, you
425 //must place, in the relevant source files, a statement of the
426 //additional terms that apply to those files, or a notice indicating
427 //where to find the applicable terms.
428 //
429 // Additional terms, permissive or non-permissive, may be stated in the
430 //form of a separately written license, or stated as exceptions;
431 //the above requirements apply either way.
432 //
433 // 8. Termination.
434 //
435 // You may not propagate or modify a covered work except as expressly
436 //provided under this License. Any attempt otherwise to propagate or
437 //modify it is void, and will automatically terminate your rights under
438 //this License (including any patent licenses granted under the third
439 //paragraph of section 11).
440 //
441 // However, if you cease all violation of this License, then your
442 //license from a particular copyright holder is reinstated (a)
443 //provisionally, unless and until the copyright holder explicitly and
444 //finally terminates your license, and (b) permanently, if the copyright
445 //holder fails to notify you of the violation by some reasonable means
446 //prior to 60 days after the cessation.
447 //
448 // Moreover, your license from a particular copyright holder is
449 //reinstated permanently if the copyright holder notifies you of the
450 //violation by some reasonable means, this is the first time you have
451 //received notice of violation of this License (for any work) from that
452 //copyright holder, and you cure the violation prior to 30 days after
453 //your receipt of the notice.
454 //
455 // Termination of your rights under this section does not terminate the
456 //licenses of parties who have received copies or rights from you under
457 //this License. If your rights have been terminated and not permanently
458 //reinstated, you do not qualify to receive new licenses for the same
459 //material under section 10.
460 //
461 // 9. Acceptance Not Required for Having Copies.
462 //
463 // You are not required to accept this License in order to receive or
464 //run a copy of the Program. Ancillary propagation of a covered work
465 //occurring solely as a consequence of using peer-to-peer transmission
466 //to receive a copy likewise does not require acceptance. However,
467 //nothing other than this License grants you permission to propagate or
468 //modify any covered work. These actions infringe copyright if you do
469 //not accept this License. Therefore, by modifying or propagating a
470 //covered work, you indicate your acceptance of this License to do so.
471 //
472 // 10. Automatic Licensing of Downstream Recipients.
473 //
474 // Each time you convey a covered work, the recipient automatically
475 //receives a license from the original licensors, to run, modify and
476 //propagate that work, subject to this License. You are not responsible
477 //for enforcing compliance by third parties with this License.
478 //
479 // An "entity transaction" is a transaction transferring control of an
480 //organization, or substantially all assets of one, or subdividing an
481 //organization, or merging organizations. If propagation of a covered
482 //work results from an entity transaction, each party to that
483 //transaction who receives a copy of the work also receives whatever
484 //licenses to the work the party's predecessor in interest had or could
485 //give under the previous paragraph, plus a right to possession of the
486 //Corresponding Source of the work from the predecessor in interest, if
487 //the predecessor has it or can get it with reasonable efforts.
488 //
489 // You may not impose any further restrictions on the exercise of the
490 //rights granted or affirmed under this License. For example, you may
491 //not impose a license fee, royalty, or other charge for exercise of
492 //rights granted under this License, and you may not initiate litigation
493 //(including a cross-claim or counterclaim in a lawsuit) alleging that
494 //any patent claim is infringed by making, using, selling, offering for
495 //sale, or importing the Program or any portion of it.
496 //
497 // 11. Patents.
498 //
499 // A "contributor" is a copyright holder who authorizes use under this
500 //License of the Program or a work on which the Program is based. The
501 //work thus licensed is called the contributor's "contributor version".
502 //
503 // A contributor's "essential patent claims" are all patent claims
504 //owned or controlled by the contributor, whether already acquired or
505 //hereafter acquired, that would be infringed by some manner, permitted
506 //by this License, of making, using, or selling its contributor version,
507 //but do not include claims that would be infringed only as a
508 //consequence of further modification of the contributor version. For
509 //purposes of this definition, "control" includes the right to grant
510 //patent sublicenses in a manner consistent with the requirements of
511 //this License.
512 //
513 // Each contributor grants you a non-exclusive, worldwide, royalty-free
514 //patent license under the contributor's essential patent claims, to
515 //make, use, sell, offer for sale, import and otherwise run, modify and
516 //propagate the contents of its contributor version.
517 //
518 // In the following three paragraphs, a "patent license" is any express
519 //agreement or commitment, however denominated, not to enforce a patent
520 //(such as an express permission to practice a patent or covenant not to
521 //sue for patent infringement). To "grant" such a patent license to a
522 //party means to make such an agreement or commitment not to enforce a
523 //patent against the party.
524 //
525 // If you convey a covered work, knowingly relying on a patent license,
526 //and the Corresponding Source of the work is not available for anyone
527 //to copy, free of charge and under the terms of this License, through a
528 //publicly available network server or other readily accessible means,
529 //then you must either (1) cause the Corresponding Source to be so
530 //available, or (2) arrange to deprive yourself of the benefit of the
531 //patent license for this particular work, or (3) arrange, in a manner
532 //consistent with the requirements of this License, to extend the patent
533 //license to downstream recipients. "Knowingly relying" means you have
534 //actual knowledge that, but for the patent license, your conveying the
535 //covered work in a country, or your recipient's use of the covered work
536 //in a country, would infringe one or more identifiable patents in that
537 //country that you have reason to believe are valid.
538 //
539 // If, pursuant to or in connection with a single transaction or
540 //arrangement, you convey, or propagate by procuring conveyance of, a
541 //covered work, and grant a patent license to some of the parties
542 //receiving the covered work authorizing them to use, propagate, modify
543 //or convey a specific copy of the covered work, then the patent license
544 //you grant is automatically extended to all recipients of the covered
545 //work and works based on it.
546 //
547 // A patent license is "discriminatory" if it does not include within
548 //the scope of its coverage, prohibits the exercise of, or is
549 //conditioned on the non-exercise of one or more of the rights that are
550 //specifically granted under this License. You may not convey a covered
551 //work if you are a party to an arrangement with a third party that is
552 //in the business of distributing software, under which you make payment
553 //to the third party based on the extent of your activity of conveying
554 //the work, and under which the third party grants, to any of the
555 //parties who would receive the covered work from you, a discriminatory
556 //patent license (a) in connection with copies of the covered work
557 //conveyed by you (or copies made from those copies), or (b) primarily
558 //for and in connection with specific products or compilations that
559 //contain the covered work, unless you entered into that arrangement,
560 //or that patent license was granted, prior to 28 March 2007.
561 //
562 // Nothing in this License shall be construed as excluding or limiting
563 //any implied license or other defenses to infringement that may
564 //otherwise be available to you under applicable patent law.
565 //
566 // 12. No Surrender of Others' Freedom.
567 //
568 // If conditions are imposed on you (whether by court order, agreement or
569 //otherwise) that contradict the conditions of this License, they do not
570 //excuse you from the conditions of this License. If you cannot convey a
571 //covered work so as to satisfy simultaneously your obligations under this
572 //License and any other pertinent obligations, then as a consequence you may
573 //not convey it at all. For example, if you agree to terms that obligate you
574 //to collect a royalty for further conveying from those to whom you convey
575 //the Program, the only way you could satisfy both those terms and this
576 //License would be to refrain entirely from conveying the Program.
577 //
578 // 13. Use with the GNU Affero General Public License.
579 //
580 // Notwithstanding any other provision of this License, you have
581 //permission to link or combine any covered work with a work licensed
582 //under version 3 of the GNU Affero General Public License into a single
583 //combined work, and to convey the resulting work. The terms of this
584 //License will continue to apply to the part which is the covered work,
585 //but the special requirements of the GNU Affero General Public License,
586 //section 13, concerning interaction through a network will apply to the
587 //combination as such.
588 //
589 // 14. Revised Versions of this License.
590 //
591 // The Free Software Foundation may publish revised and/or new versions of
592 //the GNU General Public License from time to time. Such new versions will
593 //be similar in spirit to the present version, but may differ in detail to
594 //address new problems or concerns.
595 //
596 // Each version is given a distinguishing version number. If the
597 //Program specifies that a certain numbered version of the GNU General
598 //Public License "or any later version" applies to it, you have the
599 //option of following the terms and conditions either of that numbered
600 //version or of any later version published by the Free Software
601 //Foundation. If the Program does not specify a version number of the
602 //GNU General Public License, you may choose any version ever published
603 //by the Free Software Foundation.
604 //
605 // If the Program specifies that a proxy can decide which future
606 //versions of the GNU General Public License can be used, that proxy's
607 //public statement of acceptance of a version permanently authorizes you
608 //to choose that version for the Program.
609 //
610 // Later license versions may give you additional or different
611 //permissions. However, no additional obligations are imposed on any
612 //author or copyright holder as a result of your choosing to follow a
613 //later version.
614 //
615 // 15. Disclaimer of Warranty.
616 //
617 // THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
618 //APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
619 //HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
620 //OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
621 //THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
622 //PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
623 //IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
624 //ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
625 //
626 // 16. Limitation of Liability.
627 //
628 // IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
629 //WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
630 //THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
631 //GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
632 //USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
633 //DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
634 //PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
635 //EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
636 //SUCH DAMAGES.
637 //
638 // 17. Interpretation of Sections 15 and 16.
639 //
640 // If the disclaimer of warranty and limitation of liability provided
641 //above cannot be given local legal effect according to their terms,
642 //reviewing courts shall apply local law that most closely approximates
643 //an absolute waiver of all civil liability in connection with the
644 //Program, unless a warranty or assumption of liability accompanies a
645 //copy of the Program in return for a fee.
646 //
647 // END OF TERMS AND CONDITIONS
648 //
649 // How to Apply These Terms to Your New Programs
650 //
651 // If you develop a new program, and you want it to be of the greatest
652 //possible use to the public, the best way to achieve this is to make it
653 //free software which everyone can redistribute and change under these terms.
654 //
655 // To do so, attach the following notices to the program. It is safest
656 //to attach them to the start of each source file to most effectively
657 //state the exclusion of warranty; and each file should have at least
658 //the "copyright" line and a pointer to where the full notice is found.
659 //
660 // <one line to give the program's name and a brief idea of what it does.>
661 // Copyright (C) <year> <name of author>
662 //
663 // This program is free software: you can redistribute it and/or modify
664 // it under the terms of the GNU General Public License as published by
665 // the Free Software Foundation, either version 3 of the License, or
666 // (at your option) any later version.
667 //
668 // This program is distributed in the hope that it will be useful,
669 // but WITHOUT ANY WARRANTY; without even the implied warranty of
670 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
671 // GNU General Public License for more details.
672 //
673 // You should have received a copy of the GNU General Public License
674 // along with this program. If not, see <http://www.gnu.org/licenses/>.
675 //
676 //Also add information on how to contact you by electronic and paper mail.
677 //
678 // If the program does terminal interaction, make it output a short
679 //notice like this when it starts in an interactive mode:
680 //
681 // <program> Copyright (C) <year> <name of author>
682 // This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
683 // This is free software, and you are welcome to redistribute it
684 // under certain conditions; type `show c' for details.
685 //
686 //The hypothetical commands `show w' and `show c' should show the appropriate
687 //parts of the General Public License. Of course, your program's commands
688 //might be different; for a GUI interface, you would use an "about box".
689 //
690 // You should also get your employer (if you work as a programmer) or school,
691 //if any, to sign a "copyright disclaimer" for the program, if necessary.
692 //For more information on this, and how to apply and follow the GNU GPL, see
693 //<http://www.gnu.org/licenses/>.
694 //
695 // The GNU General Public License does not permit incorporating your program
696 //into proprietary programs. If your program is a subroutine library, you
697 //may consider it more useful to permit linking proprietary applications with
698 //the library. If this is what you want to do, use the GNU Lesser General
699 //Public License instead of this License. But first, please read
700 //<http://www.gnu.org/philosophy/why-not-lgpl.html>.
701 //-------------------------------------------------------------------------------------------------
702 //
703 //This source file contains date and time calculation and
704 //manipulation functions.
705 //
706 require_once("config.inc"); //Scheduling configuration.
707 require_once("confighard.inc"); //Necessary for date minimums and maximums.
708 //
709 //================================================================================
710 //================================================================================
711 //==== R A W C A L C U L A T I O N ==========================================
712 //================================================================================
713 //================================================================================
714 //Returns the number of days in the year.
715 //
716 //Unit-tested 20060408.
717 //
718 function DATEFUNC_year_days($year)
719 {
720 //May need to be changed if confighard.inc is modified for a longer calendar
721 //range.
722 $mod_4 = $year % 4;
723 $mod_100 = $year % 100;
724 $mod_400 = $year % 400;
725
726 if ($mod_4 != 0)
727 {
728 //We can't have a leap year unless it is divisible by 4.
729 return(365);
730 }
731 else if (($mod_100 == 0) && ($mod_400 != 0))
732 {
733 //Divisible by 100 and not divible by 400. Not a leap year.
734 return(365);
735 }
736 else
737 {
738 //Divisible by 4 and not meeting the exception case: leap year.
739 return(366);
740 }
741 }
742 //
743 //
744 //--------------------------------------------------------------------------------
745 //Returns the number of days in all years preceding but not including the
746 //start year. This is used for modulo arithmetic to determine day of week
747 //and so on. An array is much faster (I think and hope) than an iterative method
748 //involving summing the years.
749 //
750 //Note: this function has not yet been unit-tested (after it was changed from
751 //a lookup table). This is still todo.
752 //
753 function DATEFUNC_year_predecessor_sum($year_in)
754 {
755 //Customized for lower limit of 1700, upper limit if 2300.
756 //
757 if (($year_in >= CONFIGHARD_DATEFUNC_MINYEAR) && ($year_in < CONFIGHARD_DATEFUNC_MAXYEAR))
758 {
759 //In year $year_in, the number of prior years where the year was divisible
760 //by 4 is given by the expression below.
761 if ($year_in == CONFIGHARD_DATEFUNC_MINYEAR)
762 {
763 $years_prior_div_4 = 0;
764 }
765 else
766 {
767 $years_prior_div_4 = (int)(($year_in - 1 - CONFIGHARD_DATEFUNC_MINYEAR) / 4);
768 //Verified in the PHP docs that cast to int from float behaves with classic
769 //div behavior (rounding down), so will be OK.
770 }
771
772 //Correct for the fact that 1800, 1900, 2100, and 2200 are not leap years, but 2000 is.
773 if (($year_in > 1800) && ($year_in <= 1900))
774 {
775 //1800 was not a leap year, so we need to deduct 1 from the total leap years encountered.
776 $years_prior_div_4 -= 1;
777 }
778 else if (($year_in > 1900) && ($year_in <= 2100))
779 {
780 //1800 was not a leap year, and 1900 was not a leap year (but 2000 was),
781 //so we need to deduct 2 from the total leap years encountered.
782 $years_prior_div_4 -= 2;
783 }
784 else if (($year_in > 2100) && ($year_in <= 2200))
785 {
786 //1800, 1900, and 2100 were not leap years (but 2000 was),
787 //so we need to deduct 3 from the total leap years encountered.
788 $years_prior_div_4 -= 3;
789 }
790 else /* if (($year_in > 2200) && ($year_in <= 2300)) */
791 {
792 //1800, 1900, 2100, and 2200 were not leap years (but 2000 was),
793 //so we need to deduct 4 from the total leap years encountered.
794 $years_prior_div_4 -= 4;
795 }
796
797 //The total number of days in years prior is going to be 365 times the number
798 //of years prior, except we need to add a day for each leap year prior.
799 if ($year_in == CONFIGHARD_DATEFUNC_MINYEAR)
800 {
801 return(0);
802 }
803 else
804 {
805 return((int)(($year_in - CONFIGHARD_DATEFUNC_MINYEAR) * 365 + $years_prior_div_4));
806 }
807 }
808 else
809 {
810 //Not a year we can calculate about. Don't want to error-trap at such a
811 //low level. Just return zero.
812 return(0);
813 }
814 }
815 //
816 //
817 //--------------------------------------------------------------------------------
818 //Calculates the number of days in a given month of a given year. Years are
819 //2000 ... (i.e. full-sized integer), and months are referenced in the traditional
820 //way, 1..12.
821 //
822 //Unit-tested 20060408.
823 //
824 function DATEFUNC_year_month_days($year, $month)
825 {
826 switch ($month)
827 {
828 default:
829 case 1:
830 return(31);
831 break;
832 case 2:
833 if (DATEFUNC_year_days($year) == 365)
834 {
835 return(28);
836 }
837 else
838 {
839 return(29);
840 }
841 break;
842 case 3:
843 return(31);
844 break;
845 case 4:
846 return(30);
847 break;
848 case 5:
849 return(31);
850 break;
851 case 6:
852 return(30);
853 break;
854 case 7:
855 return(31);
856 break;
857 case 8:
858 return(31);
859 break;
860 case 9:
861 return(30);
862 break;
863 case 10:
864 return(31);
865 break;
866 case 11:
867 return(30);
868 break;
869 case 12:
870 return(31);
871 break;
872 }
873 }
874 //
875 //
876 //--------------------------------------------------------------------------------
877 //Calcualtes the Julian offset of a date within a certain year. The offset
878 //of January 1 of any year is 0. Year, month, and day are 2000 ..., 1 ..., and
879 //1 ..., respectively.
880 //
881 //Unit-tested 20060408.
882 //
883 function DATEFUNC_year_julian_offset($year, $month, $day)
884 {
885 switch ($month)
886 {
887 default:
888 case 1:
889 return($day - 1);
890 break;
891 case 2:
892 return(31 + $day - 1);
893 case 3:
894 if (DATEFUNC_year_days($year) == 365)
895 {
896 return(59 + $day - 1);
897 }
898 else
899 {
900 return(59 + $day);
901 }
902 break;
903 case 4:
904 if (DATEFUNC_year_days($year) == 365)
905 {
906 return(90 + $day - 1);
907 }
908 else
909 {
910 return(90 + $day);
911 }
912 break;
913 case 5:
914 if (DATEFUNC_year_days($year) == 365)
915 {
916 return(120 + $day - 1);
917 }
918 else
919 {
920 return(120 + $day);
921 }
922 break;
923 case 6:
924 if (DATEFUNC_year_days($year) == 365)
925 {
926 return(151 + $day - 1);
927 }
928 else
929 {
930 return(151 + $day);
931 }
932 break;
933 case 7:
934 if (DATEFUNC_year_days($year) == 365)
935 {
936 return(181 + $day - 1);
937 }
938 else
939 {
940 return(181 + $day);
941 }
942 break;
943 case 8:
944 if (DATEFUNC_year_days($year) == 365)
945 {
946 return(212 + $day - 1);
947 }
948 else
949 {
950 return(212 + $day);
951 }
952 break;
953 case 9:
954 if (DATEFUNC_year_days($year) == 365)
955 {
956 return(243 + $day - 1);
957 }
958 else
959 {
960 return(243 + $day);
961 }
962 break;
963 case 10:
964 if (DATEFUNC_year_days($year) == 365)
965 {
966 return(273 + $day - 1);
967 }
968 else
969 {
970 return(273 + $day);
971 }
972 break;
973 case 11:
974 if (DATEFUNC_year_days($year) == 365)
975 {
976 return(304 + $day - 1);
977 }
978 else
979 {
980 return(304 + $day);
981 }
982 break;
983 case 12:
984 if (DATEFUNC_year_days($year) == 365)
985 {
986 return(334 + $day - 1);
987 }
988 else
989 {
990 return(334 + $day);
991 }
992 break;
993 }
994 }
995 //
996 //
997 //--------------------------------------------------------------------------------
998 //Given year, month, and day (2000 ..., 1 ..., 1 ...), returns an integer
999 //representing the day of the week.
1000 // 0 : Sunday
1001 // 1 : Monday
1002 // 2 : Tuesday
1003 // 3 : Wednesday
1004 // 4 : Thursday
1005 // 5 : Friday
1006 // 6 : Saturday
1007 //
1008 //Unit-tested 20060408.
1009 //
1010 function DATEFUNC_intdayofweek_intdate($year, $month, $day)
1011 {
1012 $int_differential = CONFIGHARD_DATEFUNC_EPOCH_DOW
1013 + DATEFUNC_year_predecessor_sum($year)
1014 + DATEFUNC_year_julian_offset($year, $month, $day);
1015 return($int_differential % 7);
1016 }
1017 //--------------------------------------------------------------------------------
1018 //Compares two dates, expressed as integers. Both must be properly formatted
1019 //(i.e. valid years, months, and days). Returns:
1020 // -1 if a < b.
1021 // 0 if a == b.
1022 // 1 if a > b.
1023 //
1024 function DATEFUNC_cmp($ya, $ma, $da, $yb, $mb, $db)
1025 {
1026 if ($ya < $yb)
1027 {
1028 return(-1);
1029 }
1030 else if ($ya > $yb)
1031 {
1032 return(1);
1033 }
1034 else
1035 {
1036 if ($ma < $mb)
1037 {
1038 return(-1);
1039 }
1040 else if ($ma > $mb)
1041 {
1042 return(1);
1043 }
1044 else
1045 {
1046 if ($da < $db)
1047 {
1048 return(-1);
1049 }
1050 else if ($da > $db)
1051 {
1052 return(1);
1053 }
1054 else
1055 {
1056 return(0);
1057 }
1058 }
1059 }
1060 }
1061 //
1062 //
1063 //--------------------------------------------------------------------------------
1064 //Given a year, a month, and a month offset, moves the passed date backward
1065 //(in the case of negative month offset) or forward (in the case of positive
1066 //month offset) and calculates a new year and month. The calculated returned
1067 //value will not go outside the range set in CONFIGHARD.INC for the
1068 //scheduling range.
1069 //
1070 //A result flag is set to:
1071 // -1 : If the result had to be clipped because it went outside the calendar
1072 // functionality window.
1073 // 0 : If the result did not have to be clipped.
1074 // 1 : If the result had to be clipped because it went outside the calendar
1075 // functionality window.
1076 //
1077 //The values passed in must be valid.
1078 //
1079 //The ordinal month approach is used because integer math tends to be
1080 //very fast.
1081 //
1082 function DATEFUNC_offset_month($year_in, $month_in, $month_offset_in, &$year_out, &$month_out, &$result_out)
1083 {
1084 //Default value of result.
1085 $result_out = 0;
1086
1087 //Create ordinal month representations of the min and max allowable months. Using this
1088 //scheme, the 0'th month would be January of 0 A.D.
1089 $min_ordinal_month = CONFIGHARD_DATEFUNC_MINYEAR * 12;
1090 $max_ordinal_month = CONFIGHARD_DATEFUNC_MAXYEAR * 12 - 1;
1091
1092 //Create ordinal month representation of the input year, month.
1093 $in_ordinal_month = $year_in * 12 + $month_in - 1;
1094
1095 //Create the ordinal month reprsentation of the input + offset.
1096 $calcd_ordinal_month = $in_ordinal_month + $month_offset_in;
1097
1098 //Clip the result to be within the scheduling range of the FBO-prime software.
1099 if ($calcd_ordinal_month < $min_ordinal_month)
1100 {
1101 $calcd_ordinal_month = $min_ordinal_month;
1102 $result_out = -1;
1103 }
1104 else if ($calcd_ordinal_month > $max_ordinal_month)
1105 {
1106 $calcd_ordinal_month = $max_ordinal_month;
1107 $result_out = 1;
1108 }
1109
1110 //Convert back to calendar year and month format.
1111 $year_out = (int) ($calcd_ordinal_month / 12);
1112 $month_out = ($calcd_ordinal_month % 12) + 1;
1113 }
1114 //
1115 //
1116 //--------------------------------------------------------------------------------
1117 //Calculates the date one week ago. The date passed in must be within the
1118 //calendaring range and the date one week before must be also within
1119 //calendaring range.
1120 //
1121 function DATEFUNC_one_week_ago($year_in, $month_in, $day_in, &$year_out, &$month_out, &$day_out)
1122 {
1123 if (($day_in - 7) > 0)
1124 {
1125 //Simplest case. Different date within the same month.
1126 $year_out = $year_in;
1127 $month_out = $month_in;
1128 $day_out = $day_in - 7;
1129 }
1130 else
1131 {
1132 //Have to roll the month backwards.
1133 if ($month_in > 1)
1134 {
1135 //Have to roll day and month backwards, but not the year.
1136 $year_out = $year_in;
1137 $month_out = $month_in - 1;
1138 $day_out = $day_in - 7 + DATEFUNC_year_month_days($year_in, $month_in - 1);
1139 }
1140 else
1141 {
1142 //Have to roll back the day, month, and year.
1143 $year_out = $year_in - 1;
1144 $month_out = 12;
1145 $day_out = $day_in - 7 + DATEFUNC_year_month_days($year_in - 1, 12);
1146 }
1147 }
1148 }
1149 //
1150 //--------------------------------------------------------------------------------
1151 //Calculates the date one week in the future. The date passed in must be within the
1152 //calendaring range and the date one week in the future must be also within
1153 //calendaring range.
1154 //
1155 function DATEFUNC_one_week_future($year_in, $month_in, $day_in, &$year_out, &$month_out, &$day_out)
1156 {
1157 $days_in_month = DATEFUNC_year_month_days($year_in, $month_in);
1158
1159 if (($day_in + 7) <= $days_in_month)
1160 {
1161 //Simplest case. Different date within the same month.
1162 $year_out = $year_in;
1163 $month_out = $month_in;
1164 $day_out = $day_in + 7;
1165 }
1166 else
1167 {
1168 //Have to roll the month forward.
1169 if ($month_in < 12)
1170 {
1171 //Have to roll day and month forward, but not the year.
1172 $year_out = $year_in;
1173 $month_out = $month_in + 1;
1174 $day_out = $day_in + 7 - $days_in_month;
1175 }
1176 else
1177 {
1178 //Have to roll forward the day, month, and year.
1179 $year_out = $year_in + 1;
1180 $month_out = 1;
1181 $day_out = $day_in + 7 - $days_in_month;
1182 }
1183 }
1184 }
1185 //
1186 //--------------------------------------------------------------------------------
1187 //Calculates the date one day ago. The date passed in must be within the
1188 //calendaring range and the date one day before must be also within
1189 //calendaring range.
1190 //
1191 function DATEFUNC_one_day_ago($year_in, $month_in, $day_in, &$year_out, &$month_out, &$day_out)
1192 {
1193 if ($day_in > 1)
1194 {
1195 //Simplest case. Different date within the same month.
1196 $year_out = $year_in;
1197 $month_out = $month_in;
1198 $day_out = $day_in - 1;
1199 }
1200 else
1201 {
1202 //Have to roll the month backwards.
1203 if ($month_in > 1)
1204 {
1205 //Have to roll day and month backwards, but not the year.
1206 $year_out = $year_in;
1207 $month_out = $month_in - 1;
1208 $day_out = DATEFUNC_year_month_days($year_in, $month_in - 1);
1209 }
1210 else
1211 {
1212 //Have to roll back the day, month, and year.
1213 $year_out = $year_in - 1;
1214 $month_out = 12;
1215 $day_out = DATEFUNC_year_month_days($year_in - 1, 12);
1216 }
1217 }
1218 }
1219 //
1220 //--------------------------------------------------------------------------------
1221 //Calculates the date one day in the future. The date passed in must be within the
1222 //calendaring range and the date one day in the future must be also within
1223 //calendaring range.
1224 //
1225 function DATEFUNC_one_day_future($year_in, $month_in, $day_in, &$year_out, &$month_out, &$day_out)
1226 {
1227 $days_in_month = DATEFUNC_year_month_days($year_in, $month_in);
1228
1229 if ($day_in < $days_in_month)
1230 {
1231 //Simplest case. Different date within the same month.
1232 $year_out = $year_in;
1233 $month_out = $month_in;
1234 $day_out = $day_in + 1;
1235 }
1236 else
1237 {
1238 //Have to roll the month forwards.
1239 if ($month_in < 12)
1240 {
1241 //Have to roll day and month forward, but not the year.
1242 $year_out = $year_in;
1243 $month_out = $month_in + 1;
1244 $day_out = 1;
1245 }
1246 else
1247 {
1248 //Have to roll forward the day, month, and year.
1249 $year_out = $year_in + 1;
1250 $month_out = 1;
1251 $day_out = 1;
1252 }
1253 }
1254 }
1255 //
1256 //--------------------------------------------------------------------------------
1257 //Given a year and a month, indicates whether it is within the window of
1258 //what should be viewable for scheduling.
1259 //
1260 //The criteria for displaying the month are:
1261 // a)The month is not outside the calendaring functionality window.
1262 // b)The month is not outside the parameters set by the
1263 // configuration constants CONFIG_SCHED_SCHEDACC_PREV_MO or
1264 // CONFIG_SCHED_SCHEDACC_FUTU_MO, which specify how many months
1265 // previous and future may be viewed.
1266 //
1267 //Returns:
1268 // -1 : If the year/month is too early to be
1269 // schedulable.
1270 // 0 : If the year/month should be schedulable.
1271 // 1 : If the year/month is too late to be schedulable.
1272 //
1273 function DATEFUNC_is_not_displayable($year_in, $month_in)
1274 {
1275 global $GLOBAL_stime_year;
1276 global $GLOBAL_stime_month;
1277
1278 //If the year is out of bounds, it is a no-go.
1279 if ($year_in < CONFIGHARD_DATEFUNC_MINYEAR)
1280 return(-1);
1281 else if ($year_in >= CONFIGHARD_DATEFUNC_MAXYEAR)
1282 return(1);
1283
1284 //If the month is out of bounds, it is a no-go.
1285 if (($month_in < 1) || ($month_in > 12))
1286 return(1); //Arbitrary, as long as it isn't 0.
1287
1288 //For reference, find the year/month that is CONFIG_SCHED_SCHEDACC_PREV_MO
1289 //behind the passed year/month. If this is clipped, no harm done.
1290 DATEFUNC_offset_month($GLOBAL_stime_year,
1291 $GLOBAL_stime_month,
1292 -CONFIG_SCHED_SCHEDACC_PREV_MO,
1293 $year_lower_limit,
1294 $month_lower_limit,
1295 $result_flag);
1296
1297 //For reference, find the year/month that is CONFIG_SCHED_SCHEDACC_FUTU_MO
1298 //ahead of the passed year/month. If this is clipped, no harm done.
1299 DATEFUNC_offset_month($GLOBAL_stime_year,
1300 $GLOBAL_stime_month,
1301 CONFIG_SCHED_SCHEDACC_FUTU_MO,
1302 $year_upper_limit,
1303 $month_upper_limit,
1304 $result_flag);
1305
1306 //echo " year upper limit : " . $year_upper_limit . " month_upper_limit : " . $month_upper_limit . " ";
1307
1308 //If the passed year/month are below the lower limit, this means it isn't
1309 //displayable.
1310 if (DATEFUNC_cmp($year_in, $month_in, 1, $year_lower_limit, $month_lower_limit, 1) == -1)
1311 return(-1);
1312
1313 //If the passed year/month are above the upper limit, this means it isn't
1314 //displayable.
1315 if (DATEFUNC_cmp($year_in, $month_in, 1, $year_upper_limit, $month_upper_limit, 1) == 1)
1316 return(1);
1317
1318 //If we're here, it is displayable.
1319 return(0);
1320 }
1321 //
1322 //================================================================================
1323 //================================================================================
1324 //==== S T R I N G M A P P I N G ============================================
1325 //================================================================================
1326 //================================================================================
1327 //
1328 //Returns the string associated with an ordinal month number 1-12.
1329 //
1330 function DATEFUNC_string_month_long($month_no)
1331 {
1332 $lookup = array("January",
1333 "February",
1334 "March",
1335 "April",
1336 "May",
1337 "June",
1338 "July",
1339 "August",
1340 "September",
1341 "October",
1342 "November",
1343 "December");
1344
1345 if (($month_no < 1) || ($month_no > 12))
1346 {
1347 return("INVALID");
1348 }
1349 else
1350 {
1351 return($lookup[$month_no - 1]);
1352 }
1353 }
1354 //
1355 //--------------------------------------------------------------------------------
1356 //Returns the string associated with a day of the week 0-6.
1357 //
1358 function DATEFUNC_string_dow_long($dow_no)
1359 {
1360 $lookup = array("Sunday",
1361 "Monday",
1362 "Tuesday",
1363 "Wednesday",
1364 "Thursday",
1365 "Friday",
1366 "Saturday");
1367
1368 if (($dow_no < 0) || ($dow_no > 6))
1369 {
1370 return("INVALID");
1371 }
1372 else
1373 {
1374 return($lookup[$dow_no]);
1375 }
1376 }
1377 //--------------------------------------------------------------------------------
1378 //Returns a string representing the standard date, i.e. "January 19, 2009" or
1379 //whatever.
1380 //
1381 function DATEFUNC_stdlongdate($year, $month, $day)
1382 {
1383 return(DATEFUNC_string_month_long($month) . " " . $day . ", " . $year);
1384 }
1385 //
1386 //--------------------------------------------------------------------------------
1387 //Returns a string representing the standard date with day of the week,
1388 //i.e. "Friday, January 19, 2009" or whatever.
1389 //
1390 function DATEFUNC_stdlongdate_w_dow($year, $month, $day)
1391 {
1392 $dow = DATEFUNC_intdayofweek_intdate($year, $month, $day);
1393 return( DATEFUNC_string_dow_long($dow)
1394 . ", "
1395 . DATEFUNC_string_month_long($month)
1396 . " "
1397 . $day
1398 . ", "
1399 . $year);
1400 }
1401 //
1402 //--------------------------------------------------------------------------------
1403 //Returns a string representing the standard time. In non-military format,
1404 //this will be something like 5:04 p.m. In military time, something like
1405 //17:04.
1406 //
1407 function DATEFUNC_stdtimenosec($hour, $minute)
1408 {
1409 if (CONFIG_TIME_FORMAT_24HR)
1410 {
1411 //24-hour format.
1412 return(sprintf("%02d", $hour) . ":" . sprintf("%02d", $minute));
1413 }
1414 else
1415 {
1416 //12-hour format.
1417 if ($hour == 0)
1418 {
1419 return(sprintf("%d", 12) . ":" . sprintf("%02d", $minute) . " a.m.");
1420 }
1421 else if ($hour < 12)
1422 {
1423 return(sprintf("%d", $hour) . ":" . sprintf("%02d", $minute) . " a.m.");
1424 }
1425 else if ($hour == 12)
1426 {
1427 return(sprintf("%d", $hour) . ":" . sprintf("%02d", $minute) . " p.m.");
1428 }
1429 else
1430 {
1431 return(sprintf("%d", $hour - 12) . ":" . sprintf("%02d", $minute) . " p.m.");
1432 }
1433 }
1434 }
1435 //
1436 //--------------------------------------------------------------------------------
1437 //Calculate and return an array of Boolean results to determine whether it is OK
1438 //to view/schedule the indicated date/time. Each Boolean result is TRUE if it is
1439 //OK to view/schedule or FALSE if not.
1440 //
1441 // a)[0] A month ago.
1442 // b)[1] A week ago.
1443 // c)[2] A day ago.
1444 // d)[3] One panel back.
1445 // e)[4] One panel forward.
1446 // f)[5] One day forward.
1447 // g)[6] One week forward.
1448 // h)[7] One month forward.
1449 //
1450 function DATEFUNC_viewschedtime_differential_array($dispyear, $dispmonth, $dispday,
1451 $disphour, $dispminute)
1452 {
1453 global $CONFIG_SCHED_DAY_PANELS;
1454
1455 //Default to all FALSE so we don't forget anything.
1456 //
1457 $rv = array(FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE);
1458
1459 //NOW
1460 //---
1461 //For reference, determine if the base display date passed in is
1462 //displayable/schedulable.
1463 //
1464 if (DATEFUNC_is_not_displayable($dispyear, $dispmonth) == 0)
1465 $base_date_is_ok = TRUE;
1466 else
1467 $base_date_is_ok = FALSE;
1468
1469 //A MONTH AGO
1470 //-----------
1471 //First, try to back off one month to get to the previous month. If we fail on this
1472 //(because we're at the lower limit of what the calendar functionality can handle),
1473 //then we definitely can't display the previous month.
1474 //
1475 DATEFUNC_offset_month($dispyear, $dispmonth, -1, $prev_month_year, $prev_month_month, $prev_month_result_code);
1476
1477 if ($prev_month_result_code == 0)
1478 {
1479 //We are not up against the limit of the calendaring functionality.
1480 //Evaluate the previous month.
1481 //
1482 if (DATEFUNC_is_not_displayable($prev_month_year, $prev_month_month) == 0)
1483 {
1484 $rv[0] = TRUE; //Seems OK.
1485 }
1486 else
1487 {
1488 $rv[0] = FALSE; //Is outside the viewable range.
1489 }
1490 }
1491 else
1492 {
1493 //We couldn't back off because we were at the limit.
1494 $rv[0] = FALSE;
1495 }
1496
1497 //A WEEK AGO
1498 //-----------
1499 //The logic for a week ago is that if the day of the month is seven or less, the previous
1500 //month is relevant, else the current month is relevant.
1501 if ($dispday <= 7)
1502 $rv[1] = $rv[0];
1503 else
1504 $rv[1] = $base_date_is_ok;
1505
1506 //A DAY AGO
1507 //-----------
1508 //The logic for a day ago is that if the day of the month is 1, the previous
1509 //month is relevant, else the current month is relevant.
1510 if ($dispday == 1)
1511 $rv[2] = $rv[0];
1512 else
1513 $rv[2] = $base_date_is_ok;
1514
1515 //ONE PANEL BACK
1516 //--------------
1517 //Get the currently appropriate panel.
1518 $panel = TOD_best_panel($disphour, $dispminute, $CONFIG_SCHED_DAY_PANELS);
1519 //
1520 //If the current panel is not 0, backing off the panel won't change the date,
1521 //and so the passed date's status is the right thing to look at.
1522 //
1523 //If the current panel is 0, backing off will move the date to the previous
1524 //day, and we use that status.
1525 if ($panel != 0)
1526 {
1527 $rv[3] = $base_date_is_ok;
1528 }
1529 else
1530 {
1531 $rv[3] = $rv[2];
1532 }
1533
1534 //A MONTH IN THE FUTURE
1535 //---------------------
1536 //First, try to go forward one month to get to the next month. If we fail on this
1537 //(because we're at the upper limit of what the calendar functionality can handle),
1538 //then we definitely can't display the next month.
1539 //
1540 DATEFUNC_offset_month($dispyear, $dispmonth, 1, $next_month_year, $next_month_month, $next_month_result_code);
1541
1542 if ($next_month_result_code == 0)
1543 {
1544 //We are not up against the limit of the calendaring functionality.
1545 //Evaluate the next month.
1546 //
1547 if (DATEFUNC_is_not_displayable($next_month_year, $next_month_month) == 0)
1548 {
1549 $rv[7] = TRUE; //Seems OK.
1550 }
1551 else
1552 {
1553 $rv[7] = FALSE; //Is outside the viewable range.
1554 }
1555 }
1556 else
1557 {
1558 //We couldn't go forward because we were at the limit.
1559 $rv[7] = FALSE;
1560 }
1561
1562 //A WEEK IN THE FUTURE
1563 //--------------------
1564 //The logic for a week in the future is that if going forward 7 days will put us
1565 //into the next month, then the validity of that applies, otherwise the
1566 //validity for the current month applies.
1567 $days_in_base_month = DATEFUNC_year_month_days($dispyear, $dispmonth);
1568
1569 if (($dispday + 7) > $days_in_base_month)
1570 {
1571 //Get value from next month.
1572 $rv[6] = $rv[7];
1573 }
1574 else
1575 {
1576 //Get value from this month.
1577 $rv[6] = $base_date_is_ok;
1578 }
1579
1580 //A DAY IN THE FUTURE
1581 //-------------------
1582 //The logic for a day in the future is that if the current day is the last day of
1583 //the month, then next month's value applies, otherwise this month's
1584 //value applies.
1585 if ($dispday >= $days_in_base_month)
1586 $rv[5] = $rv[7]; //Next month's value.
1587 else
1588 $rv[5] = $base_date_is_ok; //This month's value.
1589
1590 //ONE PANEL IN THE FUTURE
1591 //-----------------------
1592 //If the current panel is not the last one, going to the next panel won't change
1593 //the date, and so the passed date's status is the right thing to look at.
1594 //
1595 //If the current panel is the last one, going forward will move the date to the
1596 //next day, and we use that status.
1597 $npanels = (int)(count($CONFIG_SCHED_DAY_PANELS) / 2);
1598 if ($panel >= ($npanels - 1)) //Last penel test.
1599 {
1600 $rv[4] = $rv[5];
1601 }
1602 else
1603 {
1604 $rv[4] = $base_date_is_ok;
1605 }
1606
1607 //Return the return value.
1608 return($rv);
1609 }
1610 //
1611 //--------------------------------------------------------------------------------
1612 //End of $RCSfile: datefunc.inc,v $.
1613 //--------------------------------------------------------------------------------
1614 ?>

dashley@gmail.com
ViewVC Help
Powered by ViewVC 1.1.25