| 1 |
/* |
| 2 |
* Logical Relation utility functions for Ascend |
| 3 |
* by Vicente Rico-Ramirez |
| 4 |
* Version: $Revision: 1.9 $ |
| 5 |
* Version control file: $RCSfile: logrel_util.h,v $ |
| 6 |
* Date last modified: $Date: 1997/07/29 15:52:48 $ |
| 7 |
* Last modified by: $Author: rv2a $ |
| 8 |
* |
| 9 |
* This file is part of the Ascend Language Interpreter. |
| 10 |
* |
| 11 |
* Copyright (C) 1997 Carnegie Mellon University |
| 12 |
* |
| 13 |
* This file is part of the Ascend Interpreter. |
| 14 |
* The Ascend Interpreter is free software; you can redistribute |
| 15 |
* it and/or modify it under the terms of the GNU General Public License as |
| 16 |
* published by the Free Software Foundation; either version 2 of the |
| 17 |
* License, or (at your option) any later version. |
| 18 |
* |
| 19 |
* Ascend is distributed in hope that it will be |
| 20 |
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 22 |
* General Public License for more details. |
| 23 |
* |
| 24 |
* You should have received a copy of the GNU General Public License |
| 25 |
* along with the program; if not, write to the Free Software Foundation, |
| 26 |
* Inc., 675 Mass Ave, Cambridge, MA 02139 USA. Check the file named |
| 27 |
* COPYING. |
| 28 |
* |
| 29 |
*/ |
| 30 |
|
| 31 |
/** @file |
| 32 |
* Logical Relation utility functions for Ascend. |
| 33 |
* <pre> |
| 34 |
* When #including logrel_util.h, make sure these files are #included first: |
| 35 |
* #include "utilities/ascConfig.h" |
| 36 |
* #include "compiler.h" |
| 37 |
* #include "logrelation.h" |
| 38 |
* #include "instance_enum.h" |
| 39 |
* #include "fractions.h" |
| 40 |
* #include "dimen.h" |
| 41 |
* </pre> |
| 42 |
*/ |
| 43 |
|
| 44 |
#ifndef __LOGRELATION_UTIL_H_SEEN__ |
| 45 |
#define __LOGRELATION_UTIL_H_SEEN__ |
| 46 |
|
| 47 |
extern enum Expr_enum LogRelRelop(CONST struct logrelation *lrel); |
| 48 |
/**< |
| 49 |
* <!-- enum Expr_enum LogRelRelop(lrel) --> |
| 50 |
* <!-- CONST struct logrelation *lrel; --> |
| 51 |
* Return the type of the logical relation operator of the relation: |
| 52 |
* - e_boolean_eq equality constraint |
| 53 |
* - e_boolean_neq non-equality contraint |
| 54 |
*/ |
| 55 |
|
| 56 |
extern unsigned long NumberBoolVars(CONST struct logrelation *lrel); |
| 57 |
/**< |
| 58 |
* <!-- unsigned long NumberBoolVars(lrel) --> |
| 59 |
* <!-- struct logrelation *lrel; --> |
| 60 |
* This will indicate the number of distinct boolean atoms to which this |
| 61 |
* logical relation points. This number contains both fixed and non-fixed |
| 62 |
* atoms. |
| 63 |
*/ |
| 64 |
|
| 65 |
extern struct Instance *LogRelBoolVar(CONST struct logrelation *lrel, |
| 66 |
unsigned long varnum); |
| 67 |
/**< |
| 68 |
* <!-- struct Instance *LogRelBoolVar(lrel,varnum) --> |
| 69 |
* <!-- struct logrelation *lrel; --> |
| 70 |
* <!-- unsigned long varnum; --> |
| 71 |
* This will return the varnum'th boolean variable. |
| 72 |
*/ |
| 73 |
|
| 74 |
extern unsigned long NumberRelations(CONST struct logrelation *lrel); |
| 75 |
/**< |
| 76 |
* <!-- unsigned long NumberRelations(lrel) --> |
| 77 |
* <!-- struct logrelation *lrel; --> |
| 78 |
* This will indicate the number of distinct relations to which this |
| 79 |
* logical relation points. This number contains both conditional |
| 80 |
* relations and conditional logrelations. |
| 81 |
*/ |
| 82 |
|
| 83 |
extern struct Instance *LogRelRelation(CONST struct logrelation *lrel, |
| 84 |
unsigned long relnum); |
| 85 |
/**< |
| 86 |
* <!-- struct Instance *LogRelRelation(lrel,relnum) --> |
| 87 |
* <!-- struct logrelation *lrel; --> |
| 88 |
* <!-- unsigned long relnum; --> |
| 89 |
* This will return the relnum'th relation in the satisfied rel list. |
| 90 |
*/ |
| 91 |
|
| 92 |
/*--------------------------------------------------------------------------- |
| 93 |
* Logical Relation specific code. |
| 94 |
* Very little sanity checking is done. |
| 95 |
*--------------------------------------------------------------------------- |
| 96 |
*/ |
| 97 |
|
| 98 |
extern unsigned long LogRelLength(CONST struct logrelation *lrel, int lhs); |
| 99 |
/**< |
| 100 |
* <!-- unsigned long LogRelLength(lrel,lhs) --> |
| 101 |
* <!-- const struct logrelation *lrel; --> |
| 102 |
* <!-- int lhs; --> |
| 103 |
* If lhs is true, return the number of terms on the left hand side of the |
| 104 |
* logical relation; otherwise, return the number of terms on the right |
| 105 |
* hand side of the logical relation. |
| 106 |
*/ |
| 107 |
|
| 108 |
extern CONST struct logrel_term |
| 109 |
*LogRelTerm(CONST struct logrelation *lrel, |
| 110 |
unsigned long pos, |
| 111 |
int lhs); |
| 112 |
/**< |
| 113 |
* <!-- const struct logrel_term *LogRelTerm(lrel,pos,lhs) --> |
| 114 |
* <!-- const struct logrelation *lrel; --> |
| 115 |
* <!-- unsigned long pos; --> |
| 116 |
* <!-- int lhs; --> |
| 117 |
* If lhs is true, return the term in position pos of the left hand side; |
| 118 |
* otherwise, return the term in position pos of the right hand side. |
| 119 |
* A bizarre thing about this operator: 1<=pos<=LogRelLength(lrel,lhs). |
| 120 |
* This is a holdover from gllist days. |
| 121 |
*/ |
| 122 |
|
| 123 |
#ifdef NDEBUG |
| 124 |
#define NewLogRelTerm(r,p,l) \ |
| 125 |
LOGA_TERM( (l)!=0 ? (&((r)->token.lhs[(p)])) : (&((r)->token.rhs[(p)])) ) |
| 126 |
#else |
| 127 |
#define NewLogRelTerm(r,p,l) NewLogRelTermF((r),(p),(l)) |
| 128 |
#endif |
| 129 |
/**< |
| 130 |
* If lhs is true, return the term in position p of the left hand side; |
| 131 |
* otherwise, return the term in position p of the right hand side. |
| 132 |
* For this operator: 0 <= p < LogRelLength(lrel,lhs) as a C array. |
| 133 |
* Once Everybody gets their damn hands off LogRelTerm(), switch its |
| 134 |
* semantics and eliminate one of this pair. |
| 135 |
* @param r const struct logrelation*, logical relation to query. |
| 136 |
* @param p unsigned long, position to return. |
| 137 |
* @param l int, TRUE to return from left hand side, FALSE then from rhs. |
| 138 |
* @return The term as an CONST struct logrel_term*. |
| 139 |
* @see NewLogRelTermF() |
| 140 |
*/ |
| 141 |
extern CONST struct logrel_term |
| 142 |
*NewLogRelTermF(CONST struct logrelation *lrel, unsigned long apos, int lhs); |
| 143 |
/**< |
| 144 |
* <!-- const struct logrel_term *NewLogRelTerm(lrel,apos,lhs) --> |
| 145 |
* <!-- const struct logrelation *lrel; --> |
| 146 |
* <!-- unsigned long apos; --> |
| 147 |
* <!-- int lhs; --> |
| 148 |
* <!-- If lhs is true, return the term in position apos of the left hand side; --> |
| 149 |
* <!-- otherwise, return the term in position pos of the right hand side. --> |
| 150 |
* <!-- For this operator: 0 <= apos < LogRelLength(lrel,lhs) as a C array. --> |
| 151 |
* <!-- Once Everybody gets their damn hands off LogRelTerm, switch its --> |
| 152 |
* <!-- semantics and eliminate one of this pair. --> |
| 153 |
* Implementation function for NewLogRelTerm(). Do not use this |
| 154 |
* function directly - use NewLogRelTerm() instead. |
| 155 |
*/ |
| 156 |
|
| 157 |
#ifdef NDEBUG |
| 158 |
#define LogRelSideTerm(rs,p) LOGA_TERM(&((rs)[(p)])) |
| 159 |
#else |
| 160 |
#define LogRelSideTerm(rs,p) LogRelSideTermF((rs),(p)) |
| 161 |
#endif |
| 162 |
/**< |
| 163 |
* Return the term in position p of the side. |
| 164 |
* For this operator: 0 <= p < length of the side. |
| 165 |
* @param rs CONST union LogRelTermUnion*, side. |
| 166 |
* @param p unsigned long, position to return. |
| 167 |
* @return The term as an CONST struct logrel_term*. |
| 168 |
* @see LogRelSideTermF() |
| 169 |
*/ |
| 170 |
extern CONST struct logrel_term |
| 171 |
*LogRelSideTermF(CONST union LogRelTermUnion *lrelside, unsigned long apos); |
| 172 |
/**< |
| 173 |
* <!-- CONST struct logrel_term *LogRelSideTerm(lrelside,apos) --> |
| 174 |
* <!-- CONST union LogRelTermUnion *lrelside --> |
| 175 |
* <!-- unsigned long apos; --> |
| 176 |
* <!-- Return the term in position apos of the side. --> |
| 177 |
* <!-- For this operator: 0 <= apos < length of the side. --> |
| 178 |
* Implementation function for LogRelSideTerm(). Do not use this |
| 179 |
* function directly - use LogRelSideTerm() instead. |
| 180 |
*/ |
| 181 |
|
| 182 |
#ifdef NDEBUG |
| 183 |
#define LogRelTermType(rtp) ((rtp)->t) |
| 184 |
#else |
| 185 |
#define LogRelTermType(rtp) LogRelTermTypeF(rtp) |
| 186 |
#endif |
| 187 |
/**< |
| 188 |
* Return the type of the logical relation term rtp. |
| 189 |
* WARNING: if ALLOCATED_TESTS is active, rtp must be an allocated term; |
| 190 |
* automatic variables will cause an assert() to fail. |
| 191 |
* @param rtp const struct logrel_term*, the term to query. |
| 192 |
* @return The type of the term as an enum Expr_enum. |
| 193 |
* @see LogRelTermTypeF() |
| 194 |
*/ |
| 195 |
extern enum Expr_enum LogRelTermTypeF(CONST struct logrel_term *term); |
| 196 |
/**< |
| 197 |
* <!-- enum Expr_enum LogRelTermType(term) --> |
| 198 |
* <!-- const struct logrel_term *term; --> |
| 199 |
* <!-- return the type of the logical relation term. --> |
| 200 |
* <!-- WARNING: if ALLOCATED_TESTS is active, term must be an allocated term; --> |
| 201 |
* <!-- automatic variables will cause an assert() to fail. --> |
| 202 |
* Implementation function for LogRelTermType(). Do not use this |
| 203 |
* function directly - use LogRelTermType() instead. |
| 204 |
*/ |
| 205 |
|
| 206 |
extern unsigned long LogTermBoolVarNumber(CONST struct logrel_term *term); |
| 207 |
/**< |
| 208 |
* <!-- unsigned long LogTermBoolVarNumber(term) --> |
| 209 |
* <!-- const struct logrel_term *term; --> |
| 210 |
* Return the index into the logical relation variable list. |
| 211 |
*/ |
| 212 |
|
| 213 |
extern int LogTermBoolean(CONST struct logrel_term *term); |
| 214 |
/**< |
| 215 |
* <!-- int LogTermBoolean(term) --> |
| 216 |
* <!-- const struct logrel_term *term; --> |
| 217 |
* Return the boolean value from an e_boolean type logical relation term. |
| 218 |
*/ |
| 219 |
|
| 220 |
extern int LogTermInteger(CONST struct logrel_term *term); |
| 221 |
/**< |
| 222 |
* <!-- int LogTermInteger(term); --> |
| 223 |
* <!-- CONST struct logrel_term *term; --> |
| 224 |
* Return the integer value from an e_int type logical relation term. |
| 225 |
*/ |
| 226 |
|
| 227 |
extern int LogTermIntegerBoolValue(CONST struct logrel_term *term); |
| 228 |
/**< |
| 229 |
* <!-- int LogTermInteger(term); --> |
| 230 |
* <!-- CONST struct logrel_term *term; --> |
| 231 |
* Return a 0-1 value from an e_int type logical relation term. |
| 232 |
*/ |
| 233 |
|
| 234 |
extern int LogTermBoolVar(CONST struct logrelation *lrel, |
| 235 |
CONST struct logrel_term *term); |
| 236 |
/**< |
| 237 |
* <!-- int LogTermBoolVar(lrel,term) --> |
| 238 |
* <!-- const struct logrelation *lrel; --> |
| 239 |
* <!-- const struct logrel_term *term; --> |
| 240 |
* Return the integar value from a e_var type logical relation term. |
| 241 |
*/ |
| 242 |
|
| 243 |
extern int LogTermSatisfied(CONST struct logrelation *lrel, |
| 244 |
CONST struct logrel_term *term, |
| 245 |
int perturb, |
| 246 |
struct gl_list_t *instances); |
| 247 |
/**< |
| 248 |
* <!-- int LogTermSatisfied(lrel,term); --> |
| 249 |
* <!-- CONST struct logrelation *lrel; --> |
| 250 |
* <!-- CONST struct logrel_term *term; --> |
| 251 |
* <!-- int perturb; --> |
| 252 |
* <!-- struct gl_list_t *instances; --> |
| 253 |
* Return the truth value of a SATISFIED logical relation term. |
| 254 |
* If perturb, and the instances pointed by the SATISFIED term is included |
| 255 |
* in the list instances, the truth value of the SATISFIED term is |
| 256 |
* inverted. |
| 257 |
*/ |
| 258 |
|
| 259 |
extern CONST struct Name *LogTermSatName(CONST struct logrel_term *term); |
| 260 |
/**< |
| 261 |
* <!-- struct Name *LogTermSatName(term) --> |
| 262 |
* <!-- const struct logrel_term *term; --> |
| 263 |
* Return the name of the conditional equation specified in an |
| 264 |
* e_satisfied term |
| 265 |
*/ |
| 266 |
|
| 267 |
extern unsigned long LogTermSatRelNumber(CONST struct logrel_term *term); |
| 268 |
/**< |
| 269 |
* <!-- unsigned long LogTermSatRelNumber(term) --> |
| 270 |
* <!-- const struct logrel_term *term; --> |
| 271 |
* Return the index into the logical relation relations list. |
| 272 |
*/ |
| 273 |
|
| 274 |
extern double LogTermSatTolerance(CONST struct logrel_term *term); |
| 275 |
/**< |
| 276 |
* <!-- double *LogTermSatTolerance(term) --> |
| 277 |
* <!-- const struct logrel_term *term; --> |
| 278 |
* Return the real value specified as the tolerance of an e_satisfied term |
| 279 |
*/ |
| 280 |
|
| 281 |
extern CONST dim_type *LogTermSatDimensions(CONST struct logrel_term *term); |
| 282 |
/**< |
| 283 |
* <!-- const dim_type *LogTermSatDimensions(term) --> |
| 284 |
* <!-- const struct logrel_term *term; --> |
| 285 |
* Return the dimensions of the real value specified in the tolerance of |
| 286 |
* an e_satisfied term |
| 287 |
*/ |
| 288 |
|
| 289 |
extern unsigned long LogRelDepth(CONST struct logrelation *lrel); |
| 290 |
/**< |
| 291 |
* <!-- unsigned long LogRelDepth(lrel) --> |
| 292 |
* <!-- struct logrelation *lrel; --> |
| 293 |
* Return the depth of stack required to evaluate this logical relation. |
| 294 |
*/ |
| 295 |
|
| 296 |
/*--------------------------------------------------------------------------- |
| 297 |
* TokenRelation Infix operations. |
| 298 |
*--------------------------------------------------------------------------- |
| 299 |
*/ |
| 300 |
|
| 301 |
/* |
| 302 |
* The four defines following return term pointers. |
| 303 |
* struct logrel_term *r, *t; |
| 304 |
* r = LogTermUniLeft(t); for example. |
| 305 |
* These should be implemented as functions which assert type |
| 306 |
* and revert to macros with NDEBUG. |
| 307 |
*/ |
| 308 |
#define LogTermUniLeft(t) ( ((struct LogRelUnary *)t) -> left) |
| 309 |
/**< |
| 310 |
* Retrieve the lhs of a unary logical relation. |
| 311 |
* Parameter and return values are <code>struct logrel_term*</code>. |
| 312 |
*/ |
| 313 |
#define LogTermBinLeft(t) ( ((struct LogRelBinary *)t) -> left) |
| 314 |
/**< |
| 315 |
* Retrieve the lhs of a binary logical relation. |
| 316 |
* Parameter and return values are <code>struct logrel_term*</code>. |
| 317 |
*/ |
| 318 |
#define LogTermBinRight(t) ( ((struct LogRelBinary *)t) -> right) |
| 319 |
/**< |
| 320 |
* Retrieve the rhs of a binary logical relation. |
| 321 |
* Parameter and return values are <code>struct logrel_term*</code>. |
| 322 |
*/ |
| 323 |
|
| 324 |
extern struct logrel_term *LogRelINF_Lhs(CONST struct logrelation *lrel); |
| 325 |
/**< |
| 326 |
* Returns the lhs of an infix logical relation. This may be NULL, |
| 327 |
* if the logical relation has not been set for infix scanning. |
| 328 |
*/ |
| 329 |
|
| 330 |
extern struct logrel_term *LogRelINF_Rhs(CONST struct logrelation *lrel); |
| 331 |
/**< |
| 332 |
* Return the rhs of an infix logical relation. This may be NULL |
| 333 |
* if the logical relation has not been set up for infix scanning. |
| 334 |
*/ |
| 335 |
|
| 336 |
extern CONST struct gl_list_t *LogRelBoolVarList(CONST struct logrelation *lrel); |
| 337 |
/**< |
| 338 |
* <!-- const struct gl_list_t *LogRelBoolVarList(lr); --> |
| 339 |
* <!-- const struct logrelation *lr; --> |
| 340 |
* Returns the unique incident variable list which is owned by the |
| 341 |
* logical relation. *DO NOT MODIFY*. It is for the convenience of those |
| 342 |
* desirous of a READ_ONLY look. It is a list of instance pointers, |
| 343 |
* which maybe NULL. |
| 344 |
*/ |
| 345 |
|
| 346 |
extern CONST struct gl_list_t *LogRelSatRelList(CONST struct logrelation *lrel); |
| 347 |
/**< |
| 348 |
* <!-- const struct gl_list_t *LogRelSatRelList(lr); --> |
| 349 |
* <!-- const struct logrelation *lr; --> |
| 350 |
* Returns the unique relation list which is owned by the |
| 351 |
* logical relation. *DO NOT MODIFY*. It is for the convenience of those |
| 352 |
* desirous of a READ_ONLY look. It is a list of instance pointers, |
| 353 |
* which maybe NULL. |
| 354 |
*/ |
| 355 |
|
| 356 |
ASC_DLLSPEC int LogRelResidual(CONST struct logrelation *lrel); |
| 357 |
/**< |
| 358 |
* <!-- int LogRelResidual(lrel) --> |
| 359 |
* <!-- const struct logrelation *lrel; --> |
| 360 |
* Return the boolean residual of the logical relation. |
| 361 |
*/ |
| 362 |
|
| 363 |
extern void SetLogRelResidual(struct logrelation *lrel, int value); |
| 364 |
/**< |
| 365 |
* <!-- void SetLogRelResidual(lrel,value) --> |
| 366 |
* <!-- struct logrelation *lrel; --> |
| 367 |
* <!-- int value; --> |
| 368 |
* Set the value of the logical relation residual. |
| 369 |
*/ |
| 370 |
|
| 371 |
ASC_DLLSPEC int LogRelIsCond(CONST struct logrelation *lrel); |
| 372 |
/**< |
| 373 |
* <!-- int LogRelIsCond(lrel) --> |
| 374 |
* <!-- const struct logrelation *lrel; --> |
| 375 |
* Return the value of the logiscond flag of the logicalrelation. |
| 376 |
*/ |
| 377 |
|
| 378 |
extern void SetLogRelIsCond(struct logrelation *lrel); |
| 379 |
/**< |
| 380 |
* <!-- void SetLogRelIsCond(lrel) --> |
| 381 |
* <!-- struct logrelation *lrel; --> |
| 382 |
* Sets the value of the logiscond field of the logical relation to 1 |
| 383 |
*/ |
| 384 |
|
| 385 |
extern int LogRelNominal(CONST struct logrelation *lrel); |
| 386 |
/**< |
| 387 |
* <!-- int LogRelNominal(lrel) --> |
| 388 |
* <!-- const struct logrelation *lrel; --> |
| 389 |
* Return the nominal of the logical relation. |
| 390 |
*/ |
| 391 |
|
| 392 |
extern void SetLogRelNominal(struct logrelation *lrel, int i); |
| 393 |
/**< |
| 394 |
* <!-- void SetLogRelNominal(lrel,i) --> |
| 395 |
* <!-- struct logrelation *lrel; --> |
| 396 |
* <!-- int i; --> |
| 397 |
* Sets the value of the nominal field of the logical relation to the |
| 398 |
* value of i |
| 399 |
*/ |
| 400 |
|
| 401 |
extern int FindTolInSatTermOfLogRel(struct Instance *lrelinst, |
| 402 |
struct Instance *condinst, |
| 403 |
double *tolerance); |
| 404 |
/**< |
| 405 |
* <!-- status = FindTolInSatTermOfLogRel(lrelinst,condinst); --> |
| 406 |
* <!-- struct Instance *lrelinst; --> |
| 407 |
* <!-- struct Instance *condinst; --> |
| 408 |
* <!-- int status; --> |
| 409 |
* <!-- double *tolerance; --> |
| 410 |
* Look in the logrelation instance lrelinst for a SATISFIED term involving |
| 411 |
* the instance condinst. When found, it will find the obtain tolerance |
| 412 |
* specified in the SATISFIED term (if such a value is given) and it will |
| 413 |
* assign it to the *tolerance. If the condinst is a logrel (mistakenly), |
| 414 |
* or if the SATISFIED term does not specify a value for the tolerance, |
| 415 |
* it will assign the default value DEFTOLERANCE to *tolerance. |
| 416 |
* status !=0 indicates it did not find a term containing the instance. |
| 417 |
*/ |
| 418 |
|
| 419 |
/* |
| 420 |
*--------------------------------------------------------------------------- |
| 421 |
* Calculation routines |
| 422 |
*--------------------------------------------------------------------------- |
| 423 |
*/ |
| 424 |
|
| 425 |
/* |
| 426 |
* Calculation of the Logical Residuals of a logical relation : |
| 427 |
* LogRelCalcResidualPostfix |
| 428 |
* LogRelCalcResidualInfix |
| 429 |
* and calculation of the values(s) of a boolean variable which make a |
| 430 |
* logical relation to be satisfied: |
| 431 |
* LogRelFindBoolValues |
| 432 |
* |
| 433 |
* IMPORTANT: |
| 434 |
* The solution of conditional model implicates the presence of |
| 435 |
* SATISFIED terms (satisfaction of Boundary conditions) |
| 436 |
* in some of the logical relations. Because the freedom that the |
| 437 |
* modeling language gives to the user, sometimes is very difficult |
| 438 |
* to know if the change of the truth value of a SATISFIED term is |
| 439 |
* really meaningful to the configuration of the conditional problem. |
| 440 |
* A boundary may be crossed, but still the boolean dependent on that |
| 441 |
* condition may not change; furthermore, even a change in that boolean |
| 442 |
* may not affect the configuration of the problem because a change |
| 443 |
* of configuration may require the satisfaction of several conditions |
| 444 |
* simultaneously. |
| 445 |
* The easier way to test if the crossing of a boundary affects the current |
| 446 |
* configuration is to solve the logical relations assuming such a |
| 447 |
* crossing and finding if the configuration of the problem changes. |
| 448 |
* This task is performed here by using the "perturb" flag and a list |
| 449 |
* of pointers to the relation instance which constitutes the boundary(ies). |
| 450 |
* The activation of the perturbation flag causes the calculation |
| 451 |
* routines to INVERT the truth value of the SATISFIED terms containing |
| 452 |
* the relation instances pointed by the list of pointers. |
| 453 |
* The flag and the list of pointers are needed because the SATISFIED term |
| 454 |
* is not an instance by itself and we have access to it only trough the |
| 455 |
* logrel instance. |
| 456 |
* Another option would be to modify the values of the variables incident |
| 457 |
* in the boundary until the truth value of the SATISFIED changes by itself, |
| 458 |
* but this would have to be iteratively (i.e. more expensive), since it |
| 459 |
* would be required to perform gradient calculations in |
| 460 |
* order to know how the change of the value of some variable will modify |
| 461 |
* the residual of the boundary. Other question that we would need to |
| 462 |
* answer is how many variables should be modified simultaneously,etc. |
| 463 |
* Notice that this is not necessary because we do not care about a change |
| 464 |
* in the real values of the variables incident in the boundary (and, as |
| 465 |
* a matter of fact, we do not want ot modify the current values), we only |
| 466 |
* want to know what would it happen with the value of logical variables |
| 467 |
* if the truth value of the SATISFIED term changes. |
| 468 |
* |
| 469 |
* A third option would be to keep the information about the number |
| 470 |
* of subregions in the conditional model and the values for the booleans |
| 471 |
* which make them active. This is unaceptable for problems involving |
| 472 |
* a big number of boundary conditions, since the problem is combinatorial. |
| 473 |
* |
| 474 |
* IN GENERAL, ANY USER INTERESTED IN THESE CALCULATION ROUTINES FOR |
| 475 |
* PURPOSES OF SOLVING PURE LOGIC PROBLEMS (NOT CONTAINING BOUNDARIES), |
| 476 |
* SHOULD NOT CONSIDER THE |
| 477 |
* PARAMETERS EXPLAINED ABOVE. IT IS RECOMMENDED THAT HE/SHE SHOULD |
| 478 |
* USE THE MACRO |
| 479 |
* LogRelCalcResidual |
| 480 |
* WHICH CALL THE CALCULATION ROUTINES WITHOUT CONSIDERING THOSE |
| 481 |
* PARAMETERS. |
| 482 |
*/ |
| 483 |
|
| 484 |
extern int LogRelCalcResidualPostfix(struct Instance *i, |
| 485 |
int *res, |
| 486 |
int perturb, |
| 487 |
struct gl_list_t *instances); |
| 488 |
/**< |
| 489 |
* <!-- status = int LogRelCalcResidualPostfix(i,res,perturb,instances); --> |
| 490 |
* <!-- struct Instance *i; --> |
| 491 |
* <!-- int *res; --> |
| 492 |
* <!-- int perturb; --> |
| 493 |
* <!-- struct gl_list_t *instances; --> |
| 494 |
* <!-- int status; --> |
| 495 |
* Sets *res to the logical residual of the logical relation. The logical |
| 496 |
* residual is evaluating by comparing the truth values of the two terms |
| 497 |
* of the logical relation. If the logical relation is an equality, a |
| 498 |
* residual of 1 (TRUE) means that the two terms has the same truth value, |
| 499 |
* if they do not, the residual is zero. Similar reasoning applies when |
| 500 |
* the logical relation is an inequality. |
| 501 |
* Uses postfix evaluation. |
| 502 |
* If *perturb !=0, that means that we will invert the truth value of |
| 503 |
* the SATISFIED terms involving the relation instances pointed by the |
| 504 |
* gl_list. |
| 505 |
* status != 0 implies a problem. |
| 506 |
*/ |
| 507 |
|
| 508 |
extern int LogRelCalcResidualInfix(struct Instance *i, |
| 509 |
int *res, |
| 510 |
int perturb, |
| 511 |
struct gl_list_t *instances); |
| 512 |
/**< |
| 513 |
* <!-- status = LogRelCalcResidualInfix(i,res,perturb,instances); --> |
| 514 |
* <!-- struct Instance *i; --> |
| 515 |
* <!-- int *res; --> |
| 516 |
* <!-- int perturb; --> |
| 517 |
* <!-- struct gl_list_t *instances; --> |
| 518 |
* <!-- int status; --> |
| 519 |
* Sets *res to the logical residual of the logical relation. The logical |
| 520 |
* residual is evaluating by comparing the truth values of the two terms |
| 521 |
* of the logical relation. If the logical relation is an equality, a |
| 522 |
* residual of 1 (TRUE) means that the two terms has the same truth value, |
| 523 |
* if they do not, the residual is zero. Similar reasoning applies when |
| 524 |
* the logical relation is an inequality. |
| 525 |
* Uses infix evaluation. |
| 526 |
* If *perturb !=0, that means that we will invert the truth value of |
| 527 |
* the SATISFIED terms involving the relation instances pointed by the |
| 528 |
* gl_list |
| 529 |
* status != 0 implies a problem. |
| 530 |
*/ |
| 531 |
|
| 532 |
extern int *LogRelFindBoolValues(struct Instance *i, |
| 533 |
unsigned long *dvarnum, |
| 534 |
int *able, |
| 535 |
int *nsolns, |
| 536 |
int perturb, |
| 537 |
struct gl_list_t *instances); |
| 538 |
/**< |
| 539 |
* <!-- soln_list = LogRelFindBoolValues(i,dvarnum,able,nsolns,perturb,instances); --> |
| 540 |
* <!-- struct Instance *i; --> |
| 541 |
* <!-- long *dvarnum; --> |
| 542 |
* <!-- int *able; --> |
| 543 |
* <!-- int *nsolns; --> |
| 544 |
* <!-- int perturb; --> |
| 545 |
* <!-- struct gl_list_t *instances; --> |
| 546 |
* <!-- int *soln_list; --> |
| 547 |
* |
| 548 |
* LogRelFindBoolValues WILL find a booolean solution if there is one. |
| 549 |
* The user must pass in a pointer to a |
| 550 |
* struct logrelation. The calling function should check able and/or |
| 551 |
* nsolns before accessing the information in the soln_list. |
| 552 |
* nsolns < 0 : severe problems, soln_list will be NULL |
| 553 |
* nsolns = 0 : No solution found |
| 554 |
* nsolns > 0 : The soln_status equals the number of roots found |
| 555 |
* nsolns is at most two for logical operations. |
| 556 |
* The calling function should NOT free the soln_list. |
| 557 |
* If *perturb !=0, that means that we will invert the truth value of |
| 558 |
* the SATISFIED terms involving the relation instances pointed by the |
| 559 |
* gl_list in order to find the boolean values wanted. |
| 560 |
*/ |
| 561 |
|
| 562 |
#define LogRelCalcResidual(i,r) LogRelCalcResidualPostfix(i,r,0,NULL) |
| 563 |
/**< |
| 564 |
* Macro for users interested in the calculation of pure logic relations. |
| 565 |
* Not conditional modeling. |
| 566 |
*/ |
| 567 |
|
| 568 |
#endif /* __LOGRELATION_UTIL_H_SEEN__ */ |
| 569 |
|
Parent Directory
| 
Revision Log