sim/param.cc

   1 /*
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  14  * this software without specific prior written permission.
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  27  */
  28
  29 #include <algorithm>
  30 #include <list>
  31 #include <string>
  32 #include <vector>
  33 #include <stdio.h>      // for sscanf()
  34
  35 #include <assert.h>
  36
  37 #include "sim/param.hh"
  38 #include "sim/sim_object.hh"
  39 #include "base/inifile.hh"
  40 #include "sim/configfile.hh"
  41 #include "sim/config_node.hh"
  42 #include "base/misc.hh"
  43 #include "base/str.hh"
  44 #include "base/trace.hh"
  45
  46 using namespace std;
  47
  48
  49 ////////////////////////////////////////////////////////////////////////
  50 //
  51 // BaseParam member definitions
  52 //
  53 ////////////////////////////////////////////////////////////////////////
  54
  55 void
  56 BaseParam::die(const string &err) const
  57 {
  58     context->printErrorProlog(cerr);
  59     cerr << "  parameter '" << name << "': "
  60          << err << endl;
  61     abort();
  62 }
  63
  64
  65 ////////////////////////////////////////////////////////////////////////
  66 //
  67 // Param<T> and VectorParam<T> member definitions
  68 //
  69 // We implement parsing & displaying values for various parameter
  70 // types T using a set of overloaded functions:
  71 //
  72 //  - parseParam(string s, T &value) parses s into value
  73 //  - showParam(ostream &os, T &value) displays value on os
  74 //
  75 // By making these independent functions, we can reuse the same code
  76 // for type T in both Param<T> and VectorParam<T>.
  77 //
  78 // For enum types, the parseParam function requires additional
  79 // arguments, in which case we must specialize the Param<T>::parse and
  80 // VectorParam<T>::parse calls as well.
  81 //
  82 // Type-specific instances come first, followed by more generic
  83 // templated versions and their instantiations.
  84 //
  85 ////////////////////////////////////////////////////////////////////////
  86
  87 //
  88 // The base implementations use to_number for parsing and '<<' for
  89 // displaying, suitable for integer types.
  90 //
  91 template <class T>
  92 bool
  93 parseParam(const string &s, T &value)
  94 {
  95     return to_number(s, value);
  96 }
  97
  98 template <class T>
  99 void
 100 showParam(ostream &os, T const &value)
 101 {
 102     os << value;
 103 }
 104
 105 //
 106 // Template specializations:
 107 // - char (8-bit integer)
 108 // - floating-point types
 109 // - bool
 110 // - string
 111 //
 112
 113 // Treat 8-bit ints (chars) as ints on output, not as chars
 114 template <>
 115 void
 116 showParam(ostream &os, const char &value)
 117 {
 118     os << (int)value;
 119 }
 120
 121
 122 template <>
 123 void
 124 showParam(ostream &os, const unsigned char &value)
 125 {
 126     os << (unsigned int)value;
 127 }
 128
 129
 130 // Use sscanf() for FP types as to_number() only handles integers
 131 template <>
 132 bool
 133 parseParam(const string &s, float &value)
 134 {
 135     return (sscanf(s.c_str(), "%f", &value) == 1);
 136 }
 137
 138 template <>
 139 bool
 140 parseParam(const string &s, double &value)
 141 {
 142     return (sscanf(s.c_str(), "%lf", &value) == 1);
 143 }
 144
 145 // Be flexible about what we take for bool
 146 template <>
 147 bool
 148 parseParam(const string &s, bool &value)
 149 {
 150     const string &ls = to_lower(s);
 151
 152     if (ls == "true" || ls == "t" || ls == "yes" || ls == "y" || ls == "1") {
 153         value = true;
 154         return true;
 155     }
 156
 157     if (ls == "false" || ls == "f" || ls == "no" || ls == "n" || ls == "0") {
 158         value = false;
 159         return true;
 160     }
 161
 162     return false;
 163 }
 164
 165 // Display bools as strings
 166 template <>
 167 void
 168 showParam(ostream &os, const bool &value)
 169 {
 170     os << (value ? "true" : "false");
 171 }
 172
 173
 174 // String requires no processing to speak of
 175 template <>
 176 bool
 177 parseParam(const string &s, string &value)
 178 {
 179     value = s;
 180     return true;
 181 }
 182
 183 //
 184 // End of parseParam/showParam definitions.  Now we move on to
 185 // incorporate them into the Param/VectorParam parse() and showValue()
 186 // methods.
 187 //
 188
 189 // These definitions for Param<T>::parse and VectorParam<T>::parse
 190 // work for any type for which parseParam() takes only two arguments
 191 // (i.e., all the fundamental types like int, bool, etc.), thanks to
 192 // overloading.
 193 template <class T>
 194 void
 195 Param<T>::parse(const string &s)
 196 {
 197     if (parseParam(s, value)) {
 198         wasSet = true;
 199     }
 200     else {
 201         string err("could not parse \"");
 202
 203         err += s;
 204         err += "\"";
 205
 206         die(err);
 207     }
 208 }
 209
 210 template <class T>
 211 void
 212 VectorParam<T>::parse(const string &s)
 213 {
 214     if (s.empty()) {
 215         wasSet = true;
 216         return;
 217     }
 218
 219     vector<string> tokens;
 220
 221     tokenize(tokens, s, ' ');
 222
 223     value.resize(tokens.size());
 224
 225     for (int i = 0; i < tokens.size(); i++) {
 226         // need to parse into local variable to handle vector<bool>,
 227         // for which operator[] returns a special reference class
 228         // that's not the same as 'bool&', (since it's a packed
 229         // vector)
 230         T scalar_value;
 231         if (!parseParam(tokens[i], scalar_value)) {
 232             string err("could not parse \"");
 233
 234             err += s;
 235             err += "\"";
 236
 237             die(err);
 238         }
 239
 240         // assign parsed value to vector
 241         value[i] = scalar_value;
 242     }
 243
 244     wasSet = true;
 245 }
 246
 247 // These definitions for Param<T>::showValue() and
 248 // VectorParam<T>::showValue() work for any type where showParam()
 249 // takes only two arguments (i.e., everything but the SimpleEnum and
 250 // MappedEnum classes).
 251 template <class T>
 252 void
 253 Param<T>::showValue(ostream &os) const
 254 {
 255     showParam(os, value);
 256 }
 257
 258 template <class T>
 259 void
 260 VectorParam<T>::showValue(ostream &os) const
 261 {
 262     for (int i = 0; i < value.size(); i++) {
 263         if (i != 0) {
 264             os << " ";
 265         }
 266         showParam(os, value[i]);
 267     }
 268 }
 269
 270
 271 #ifdef INSURE_BUILD
 272 #define INSTANTIATE_PARAM_TEMPLATES(type, typestr)                      \
 273 void Param<type>::showType(ostream &os) const { os << typestr; }        \
 274 void VectorParam<type>::showType(ostream &os) const {                   \
 275     os << "vector of " << typestr;                                      \
 276 }                                                                       \
 277 template Param<type>;                                                   \
 278 template VectorParam<type>;
 279
 280 #else
 281 // instantiate all four methods (parse/show, scalar/vector) for basic
 282 // types that can use the above templates
 283 #define INSTANTIATE_PARAM_TEMPLATES(type, typestr)                      \
 284 template bool parseParam<type>(const string &s, type &value);           \
 285 template void showParam<type>(ostream &os, type const &value);          \
 286 template void Param<type>::parse(const string &);                       \
 287 template void VectorParam<type>::parse(const string &);                 \
 288 template void Param<type>::showValue(ostream &) const;                  \
 289 template void VectorParam<type>::showValue(ostream &) const;            \
 290 void Param<type>::showType(ostream &os) const { os << typestr; }        \
 291 void VectorParam<type>::showType(ostream &os) const {                   \
 292     os << "vector of " << typestr;                                      \
 293 }
 294 #endif
 295
 296 INSTANTIATE_PARAM_TEMPLATES(unsigned long long, "ull")
 297 INSTANTIATE_PARAM_TEMPLATES(signed long long, "sll")
 298 INSTANTIATE_PARAM_TEMPLATES(unsigned long, "uns long")
 299 INSTANTIATE_PARAM_TEMPLATES(signed long, "long")
 300 INSTANTIATE_PARAM_TEMPLATES(unsigned int, "uns")
 301 INSTANTIATE_PARAM_TEMPLATES(signed int, "int")
 302 INSTANTIATE_PARAM_TEMPLATES(unsigned short, "uns short")
 303 INSTANTIATE_PARAM_TEMPLATES(signed short, "short")
 304 INSTANTIATE_PARAM_TEMPLATES(unsigned char, "uns char")
 305 INSTANTIATE_PARAM_TEMPLATES(signed char, "char")
 306
 307 INSTANTIATE_PARAM_TEMPLATES(float, "float")
 308 INSTANTIATE_PARAM_TEMPLATES(double, "double")
 309
 310 INSTANTIATE_PARAM_TEMPLATES(bool, "bool")
 311 INSTANTIATE_PARAM_TEMPLATES(string, "string")
 312
 313 #undef INSTANTIATE_PARAM_TEMPLATES
 314
 315 //
 316 // SimpleEnumParam & MappedEnumParam must specialize their parse(),
 317 // showValue(), and showType() methods.
 318 //
 319
 320 //
 321 // SimpleEnumParam & SimpleEnumVectorParam
 322 //
 323 bool
 324 parseEnumParam(const char *const *map, const int num_values,
 325                const string &s, int &value)
 326 {
 327     for (int i = 0; i < num_values; ++i) {
 328         if (s == map[i]) {
 329             value = i;
 330             return true;
 331         }
 332     }
 333
 334     return false;
 335 }
 336
 337 void
 338 showEnumParam(ostream &os,
 339               const char *const *map,  const int num_values,
 340               int value)
 341 {
 342     assert(0 <= value && value < num_values);
 343     os << map[value];
 344 }
 345
 346 void
 347 showEnumType(ostream &os,
 348              const char *const *map,  const int num_values)
 349 {
 350     os << "{" << map[0];
 351     for (int i = 1; i < num_values; ++i)
 352         os << "," << map[i];
 353
 354     os << "}";
 355 }
 356
 357
 358 //
 359 // MappedEnumParam & MappedEnumVectorParam
 360 //
 361 bool
 362 parseEnumParam(const EnumParamMap *map, const int num_values,
 363                const string &s, int &value)
 364 {
 365     for (int i = 0; i < num_values; ++i) {
 366         if (s == map[i].name) {
 367             value = map[i].value;
 368             return true;
 369         }
 370     }
 371
 372     return false;
 373 }
 374
 375 void
 376 showEnumParam(ostream &os,
 377               const EnumParamMap *map, const int num_values,
 378               int value)
 379 {
 380     for (int i = 0; i < num_values; ++i) {
 381         if (value == map[i].value) {
 382             os << map[i].name;
 383             return;
 384         }
 385     }
 386
 387     // if we can't find a reverse mapping just print the int value
 388     os << value;
 389 }
 390
 391 void
 392 showEnumType(ostream &os,
 393              const EnumParamMap *map,  const int num_values)
 394 {
 395     os << "{" << map[0].name;
 396     for (int i = 1; i < num_values; ++i)
 397         os << "," << map[i].name;
 398
 399     os << "}";
 400 }
 401
 402
 403 template <class Map>
 404 void
 405 EnumParam<Map>::parse(const string &s)
 406 {
 407     if (parseEnumParam(map, num_values, s, value)) {
 408         wasSet = true;
 409     } else {
 410         string err("no match for enum string \"");
 411
 412         err += s;
 413         err += "\"";
 414
 415         die(err);
 416     }
 417 }
 418
 419 template <class Map>
 420 void
 421 EnumVectorParam<Map>::parse(const string &s)
 422 {
 423     vector<string> tokens;
 424
 425     tokenize(tokens, s, ' ');
 426
 427     value.resize(tokens.size());
 428
 429     for (int i = 0; i < tokens.size(); i++) {
 430         if (!parseEnumParam(map, num_values, tokens[i], value[i])) {
 431             string err("no match for enum string \"");
 432
 433             err += s;
 434             err += "\"";
 435
 436             die(err);
 437         }
 438     }
 439
 440     wasSet = true;
 441 }
 442
 443 template <class Map>
 444 void
 445 EnumParam<Map>::showValue(ostream &os) const
 446 {
 447     showEnumParam(os, map, num_values, value);
 448 }
 449
 450 template <class Map>
 451 void
 452 EnumVectorParam<Map>::showValue(ostream &os) const
 453 {
 454     for (int i = 0; i < value.size(); i++) {
 455         if (i != 0) {
 456             os << " ";
 457         }
 458         showEnumParam(os, map, num_values, value[i]);
 459     }
 460 }
 461
 462 template <class Map>
 463 void
 464 EnumParam<Map>::showType(ostream &os) const
 465 {
 466     showEnumType(os, map, num_values);
 467 }
 468
 469 template <class Map>
 470 void
 471 EnumVectorParam<Map>::showType(ostream &os) const
 472 {
 473     os << "vector of";
 474     showEnumType(os, map, num_values);
 475 }
 476
 477 template EnumParam<const char *>;
 478 template EnumVectorParam<const char *>;
 479
 480 template EnumParam<EnumParamMap>;
 481 template EnumVectorParam<EnumParamMap>;
 482
 483 ////////////////////////////////////////////////////////////////////////
 484 //
 485 // SimObjectBaseParam methods
 486 //
 487 ////////////////////////////////////////////////////////////////////////
 488
 489 bool
 490 parseSimObjectParam(ParamContext *context, const string &s, SimObject *&value)
 491 {
 492     SimObject *obj;
 493
 494     if (to_lower(s) == "null") {
 495         // explicitly set to null by user; assume that's OK
 496         obj = NULL;
 497     }
 498     else {
 499         obj = context->resolveSimObject(s);
 500
 501         if (obj == NULL)
 502             return false;
 503     }
 504
 505     value = obj;
 506     return true;
 507 }
 508
 509
 510 void
 511 SimObjectBaseParam::showValue(ostream &os, SimObject *value) const
 512 {
 513     os << (value ? value->name() : "null");
 514 }
 515
 516 void
 517 SimObjectBaseParam::parse(const string &s, SimObject *&value)
 518 {
 519     if (parseSimObjectParam(context, s, value)) {
 520         wasSet = true;
 521     }
 522     else {
 523         string err("could not resolve object name \"");
 524
 525         err += s;
 526         err += "\"";
 527
 528         die(err);
 529     }
 530 }
 531
 532 void
 533 SimObjectBaseParam::parse(const string &s, vector<SimObject *>&value)
 534 {
 535     vector<string> tokens;
 536
 537     tokenize(tokens, s, ' ');
 538
 539     value.resize(tokens.size());
 540
 541     for (int i = 0; i < tokens.size(); i++) {
 542         if (!parseSimObjectParam(context, tokens[i], value[i])) {
 543             string err("could not resolve object name \"");
 544
 545             err += s;
 546             err += "\"";
 547
 548             die(err);
 549         }
 550     }
 551
 552     wasSet = true;
 553 }
 554
 555 ////////////////////////////////////////////////////////////////////////
 556 //
 557 // ParamContext member definitions
 558 //
 559 ////////////////////////////////////////////////////////////////////////
 560
 561 list<ParamContext *> *ParamContext::ctxList = NULL;
 562
 563 ParamContext::ParamContext(const string &_iniSection, bool noAutoParse)
 564     : iniFilePtr(NULL), // initialized on call to parseParams()
 565       iniSection(_iniSection), paramList(NULL)
 566 {
 567     if (!noAutoParse) {
 568         if (ctxList == NULL)
 569             ctxList = new list<ParamContext *>();
 570
 571         (*ctxList).push_back(this);
 572     }
 573 }
 574
 575
 576 void
 577 ParamContext::addParam(BaseParam *param)
 578 {
 579     getParamList()->push_back(param);
 580 }
 581
 582
 583 void
 584 ParamContext::parseParams(IniFile &iniFile)
 585 {
 586     iniFilePtr = &iniFile;      // set object member
 587
 588     ParamList::iterator i;
 589
 590     for (i = getParamList()->begin(); i != getParamList()->end(); ++i) {
 591         string string_value;
 592
 593         if (iniFile.findDefault(iniSection, (*i)->name, string_value)) {
 594             (*i)->parse(string_value);
 595         }
 596     }
 597 }
 598
 599
 600 // Check parameter values for validity & consistency. Default
 601 // implementation is no-op; derive subclass & override to add
 602 // actual functionality here.
 603 void
 604 ParamContext::checkParams()
 605 {
 606     // nada
 607 }
 608
 609
 610 // Clean up context-related objects at end of execution. Default
 611 // implementation is no-op; derive subclass & override to add actual
 612 // functionality here.
 613 void
 614 ParamContext::cleanup()
 615 {
 616     // nada
 617 }
 618
 619
 620 void
 621 ParamContext::describeParams(ostream &os)
 622 {
 623     ParamList::iterator i;
 624
 625     for (i = getParamList()->begin(); i != getParamList()->end(); ++i) {
 626         BaseParam *p = *i;
 627
 628         os << p->name << " (";
 629         p->showType(os);
 630         os << "): " << p->description << "\n";
 631     }
 632 }
 633
 634
 635
 636 void
 637 ParamContext::showParams(ostream &os)
 638 {
 639     ParamList::iterator i;
 640
 641     for (i = getParamList()->begin(); i != getParamList()->end(); ++i) {
 642         BaseParam *p = *i;
 643
 644         if (p->isValid()) {
 645             os << p->name << "=";
 646             p->showValue(os);
 647             os << endl;
 648         }
 649         else {
 650             os << "// "<< p->name << " not specified" << endl;
 651         }
 652     }
 653 }
 654
 655
 656 void
 657 ParamContext::printErrorProlog(ostream &os)
 658 {
 659     os << "Parameter error in section [" << iniSection << "]: " << endl;
 660 }
 661
 662 //
 663 // Resolve an object name to a SimObject pointer.  The object will be
 664 // created as a side-effect if necessary.  If the name contains a
 665 // colon (e.g., "iq:IQ"), then the object is local (invisible to
 666 // outside this context).  If there is no colon, the name needs to be
 667 // resolved through the configuration hierarchy (only possible for
 668 // SimObjectBuilder objects, which return non-NULL for configNode()).
 669 //
 670 SimObject *
 671 ParamContext::resolveSimObject(const string &_name)
 672 {
 673     // look for a colon
 674     string::size_type i = _name.find(':');
 675     string name = _name;
 676     if (i != string::npos) {
 677         // colon found: local object
 678         // add as child to current node and create it
 679         name = _name.substr(0, i);
 680         string objConfigClassName = _name.substr(i + 1);
 681         getConfigNode()->addChild(name, objConfigClassName);
 682     }
 683     ConfigNode *n = getConfigNode();
 684     return n ? n->resolveSimObject(name) : NULL;
 685 }
 686
 687
 688 //
 689 // static method: call parseParams() on all registered contexts
 690 //
 691 void
 692 ParamContext::parseAllContexts(IniFile &iniFile)
 693 {
 694     list<ParamContext *>::iterator iter;
 695
 696     for (iter = ctxList->begin(); iter != ctxList->end(); ++iter) {
 697         ParamContext *pc = *iter;
 698
 699         pc->parseParams(iniFile);
 700     }
 701 }
 702
 703
 704 //
 705 // static method: call checkParams() on all registered contexts
 706 //
 707 void
 708 ParamContext::checkAllContexts()
 709 {
 710     list<ParamContext *>::iterator iter;
 711
 712     for (iter = ctxList->begin(); iter != ctxList->end(); ++iter) {
 713         ParamContext *pc = *iter;
 714
 715         pc->checkParams();
 716     }
 717 }
 718
 719
 720 //
 721 // static method: call showParams() on all registered contexts
 722 //
 723 void
 724 ParamContext::showAllContexts(ostream &os)
 725 {
 726     list<ParamContext *>::iterator iter;
 727
 728     for (iter = ctxList->begin(); iter != ctxList->end(); ++iter) {
 729         ParamContext *pc = *iter;
 730
 731         os << "[" << pc->iniSection << "]" << endl;
 732         pc->showParams(os);
 733         os << endl;
 734     }
 735 }
 736
 737
 738 //
 739 // static method: call cleanup() on all registered contexts
 740 //
 741 void
 742 ParamContext::cleanupAllContexts()
 743 {
 744     list<ParamContext *>::iterator iter;
 745
 746     for (iter = ctxList->begin(); iter != ctxList->end(); ++iter) {
 747         ParamContext *pc = *iter;
 748
 749         pc->cleanup();
 750     }
 751 }
 752
 753
 754 //
 755 // static method: call describeParams() on all registered contexts
 756 //
 757 void
 758 ParamContext::describeAllContexts(ostream &os)
 759 {
 760     list<ParamContext *>::iterator iter;
 761
 762     for (iter = ctxList->begin(); iter != ctxList->end(); ++iter) {
 763         ParamContext *pc = *iter;
 764
 765         os << "[" << pc->iniSection << "]\n";
 766         pc->describeParams(os);
 767         os << endl;
 768     }
 769 }