yap-6.3/packages/cplint/approx/simplecuddLPADs/ProblogBDD.c

/******************************************************************************\
*                                                                              *
*    SimpleCUDD library (www.cs.kuleuven.be/~theo/tools/simplecudd.html)       *
*  SimpleCUDD was developed at Katholieke Universiteit Leuven(www.kuleuven.be) *
*                                                                              *
*  Copyright Katholieke Universiteit Leuven 2008                               *
*                                                                              *
*  Author: Theofrastos Mantadelis, Angelika Kimmig, Bernd Gutmann              *
*  File: ProblogBDD.c                                                          *
*                                                                              *
********************************************************************************
*                                                                              *
* Artistic License 2.0                                                         *
*                                                                              *
* Copyright (c) 2000-2006, The Perl Foundation.                                *
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/* modified by Fabrizio Riguzzi in 2009 for dealing with multivalued variables:
instead of variables or their negation, the script can contain equations of the
form
variable=value
Multivalued variables are translated to binary variables by means of a log
encodimg
*/

#include "simplecudd.h"
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <signal.h>
#include <time.h>

typedef struct _parameters {
  int loadfile;
  int savedfile;
  int exportfile;
  int inputfile;
  int debug;
  int errorcnt;
  int *error;
  int method;
  int queryid;
  int timeout;
  double sigmoid_slope;
  int online;
  int maxbufsize;
  char *ppid;
} parameters;

typedef struct _gradientpair {
  double probability;
  double gradient;
} gradientpair;

typedef struct _extmanager {
  DdManager *manager;
  DdNode *t, *f;
  hisqueue *his;
  namedvars varmap;
} extmanager;

double ProbBool(extmanager MyManager, DdNode *node, int bits, int nBit,
                int posBVar, variable v, int comp);
double Prob(extmanager MyManager, DdNode *node, int comp);
int correctPosition(int index, variable v, int posBVar);
double ret_prob(extmanager MyManager, DdNode *bdd);

int argtype(const char *arg);
void printhelp(int argc, char **arg);
parameters loadparam(int argc, char **arg);
parameters params;

void handler(int num);
void pidhandler(int num);
void termhandler(int num);

double sigmoid(double x, double slope);
void myexpand(extmanager MyManager, DdNode *Current);
double CalcProbability(extmanager MyManager, DdNode *Current);
double CalcProbabilitySigmoid(extmanager MyManager, DdNode *Current);
gradientpair CalcGradient(extmanager MyManager, DdNode *Current, int TargetVar,
                          char *TargetPattern);
int patterncalculated(char *pattern, extmanager MyManager, int loc);
char *extractpattern(char *thestr);

int main(int argc, char **arg) {
  clock_t start, endc, endt;
  double elapsedc, elapsedt;

  extmanager MyManager;
  DdNode *bdd;
  bddfileheader fileheader;
  int i, ivarcnt, code;
  gradientpair tvalue;
  double probability = -1.0;
  char *varpattern;
  varpattern = NULL;
  code = -1;
  params = loadparam(argc, arg);
  if (params.errorcnt > 0) {
    printhelp(argc, arg);
    for (i = 0; i < params.errorcnt; i++) {
      fprintf(stderr, "Error: not known or error at parameter %s.\n",
              arg[params.error[i]]);
    }
    return -1;
  }

  if (params.online == 0 && params.loadfile == -1) {
    printhelp(argc, arg);
    fprintf(stderr, "Error: you must specify a loading file.\n");
    return -1;
  }

  if (params.method != 0 && arg[params.method][0] != 'g' &&
      arg[params.method][0] != 'p' && arg[params.method][0] != 'o' &&
      arg[params.method][0] != 'l') {
    printhelp(argc, arg);
    fprintf(stderr, "Error: you must choose a calculation method beetween "
                    "[p]robability, [g]radient, [l]ine search, [o]nline.\n");
    return -1;
  }

  if (params.debug)
    DEBUGON;
  RAPIDLOADON;
  SETMAXBUFSIZE(params.maxbufsize);
#ifndef _WIN32
  signal(SIGINT, termhandler);
  if (params.ppid != NULL) {
    signal(SIGALRM, pidhandler);
    alarm(5);
  } else {
    signal(SIGALRM, handler);
    alarm(params.timeout);
  }
#endif
  if (params.online) {
    MyManager.manager = simpleBDDinit(0);
    MyManager.t = HIGH(MyManager.manager);
    MyManager.f = LOW(MyManager.manager);
    MyManager.varmap = InitNamedVars(1, 0);
    bdd = OnlineGenerateBDD(MyManager.manager, &MyManager.varmap);
    ivarcnt = GetVarCount(MyManager.manager);
  } else {
    fileheader = ReadFileHeader(arg[params.loadfile]);
    switch (fileheader.filetype) {
    case BDDFILE_SCRIPT:
      if (params.inputfile == -1) {
        printhelp(argc, arg);
        fprintf(stderr, "Error: an input file is necessary for this type of "
                        "loading file.\n");
        return -1;
      }
      MyManager.manager = simpleBDDinit(fileheader.varcnt);
      MyManager.t = HIGH(MyManager.manager);
      MyManager.f = LOW(MyManager.manager);
      MyManager.varmap = InitNamedMultiVars(
          fileheader.varcnt, fileheader.varstart, fileheader.bvarcnt);
      if (LoadMultiVariableData(MyManager.manager, MyManager.varmap,
                                arg[params.inputfile]) == -1)
        return -1;
      start = clock();
      bdd = FileGenerateBDD(MyManager.manager, MyManager.varmap, fileheader);
      endc = clock();
      elapsedc = ((double)(endc - start)) / CLOCKS_PER_SEC;
      printf("elapsed_construction(%lf).\n", elapsedc);
      ivarcnt = fileheader.varcnt;
      break;
    case BDDFILE_NODEDUMP:
      if (params.inputfile == -1) {
        printhelp(argc, arg);
        fprintf(stderr, "Error: an input file is necessary for this type of "
                        "loading file.\n");
        return -1;
      }
      MyManager.manager = simpleBDDinit(fileheader.varcnt);
      MyManager.t = HIGH(MyManager.manager);
      MyManager.f = LOW(MyManager.manager);
      MyManager.varmap = InitNamedVars(fileheader.varcnt, fileheader.varstart);
      bdd = LoadNodeDump(MyManager.manager, MyManager.varmap,
                         fileheader.inputfile);
      ivarcnt = fileheader.varcnt;
      break;
    default:
      fprintf(stderr, "Error: not a valid file format to load.\n");
      return -1;
      break;
    }
  }
#ifndef _WIN32
  alarm(0);
#endif
  // problem specifics

  if (bdd != NULL) {
    ivarcnt = RepairVarcnt(&MyManager.varmap);
    code = 0;
    /*
    if (params.inputfile != -1) {
      if (LoadVariableData(MyManager.varmap, arg[params.inputfile]) == -1)
    return -1;
      if (!all_loaded(MyManager.varmap, 1)) return -1;
    }*/
    MyManager.his = InitHistory(ivarcnt);
    if (params.method != 0) {
      switch (arg[params.method][0]) {
      case 'g':
        for (i = 0; i < MyManager.varmap.varcnt; i++) {
          if (MyManager.varmap.vars[i] != NULL) {
            varpattern = extractpattern(MyManager.varmap.vars[i]);
            if ((varpattern == NULL) ||
                (!patterncalculated(varpattern, MyManager, i))) {
              tvalue = CalcGradient(MyManager, bdd,
                                    i + MyManager.varmap.varstart, varpattern);
              probability = tvalue.probability;
              double factor =
                  sigmoid(MyManager.varmap.dvalue[i], params.sigmoid_slope) *
                  (1 -
                   sigmoid(MyManager.varmap.dvalue[i], params.sigmoid_slope)) *
                  params.sigmoid_slope;
              if (varpattern == NULL) {
                printf("query_gradient(%s,%s,%1.12f).\n", arg[params.queryid],
                       MyManager.varmap.vars[i], tvalue.gradient * factor);
              } else {
                varpattern[strlen(varpattern) - 2] = '\0';
                printf("query_gradient(%s,%s,%1.12f).\n", arg[params.queryid],
                       varpattern, tvalue.gradient * factor);
              }
              ReInitHistory(MyManager.his, MyManager.varmap.varcnt);
            }
            if (varpattern != NULL)
              free(varpattern);
          } else {
            fprintf(stderr, "Error: no variable name given for parameter.\n");
          }
        }
        if (probability < 0.0) {
          // no nodes, so we have to calculate probability ourself
          tvalue =
              CalcGradient(MyManager, bdd, 0 + MyManager.varmap.varstart, NULL);
          probability = tvalue.probability;
        }
        printf("query_probability(%s,%1.12f).\n", arg[params.queryid],
               probability);
        break;
      case 'l':
        tvalue =
            CalcGradient(MyManager, bdd, 0 + MyManager.varmap.varstart, NULL);
        probability = tvalue.probability;
        printf("query_probability(%s,%1.12f).\n", arg[params.queryid],
               probability);
        break;
      case 'p':
        printf("probability(%1.12f).\n", CalcProbability(MyManager, bdd));
        break;
      case 'o':
        onlinetraverse(MyManager.manager, MyManager.varmap, MyManager.his, bdd);
        break;
      default:
        myexpand(MyManager, bdd);
        break;
      }
    } else {
      start = clock();
      //	simpleNamedBDDtoDot(MyManager.manager, MyManager.varmap, bdd,
      //"bdd.dot");
      printf("probability(%1.12f).\n", ret_prob(MyManager, bdd));
      endt = clock();
      elapsedt = ((double)(endt - start)) / CLOCKS_PER_SEC;
      printf("elapsed_traversing(%lf).\n", elapsedt);
      //      myexpand(MyManager, bdd);
    }
    if (params.savedfile > -1)
      SaveNodeDump(MyManager.manager, MyManager.varmap, bdd,
                   arg[params.savedfile]);
    if (params.exportfile > -1)
      simpleNamedBDDtoDot(MyManager.manager, MyManager.varmap, bdd,
                          arg[params.exportfile]);
    ReInitHistory(MyManager.his, MyManager.varmap.varcnt);
    free(MyManager.his);
  }
  if (MyManager.manager != NULL) {
    KillBDD(MyManager.manager);
    exit(code);
    free(MyManager.varmap.dvalue);
    free(MyManager.varmap.ivalue);
    free(MyManager.varmap.dynvalue);
    for (i = 0; i < MyManager.varmap.varcnt; i++) {
      free(MyManager.varmap.vars[i]);
      free(MyManager.varmap.mvars[i].probabilities);
      free(MyManager.varmap.mvars[i].booleanVars);
    }
    free(MyManager.varmap.vars);
    free(MyManager.varmap.mvars);
    free(MyManager.varmap.bVar2mVar);
  }
  if (params.error != NULL)
    free(params.error);

  return code;
}

/* Shell Parameters handling */

int argtype(const char *arg) {
  if (strcmp(arg, "-l") == 0 || strcmp(arg, "--load") == 0)
    return 0;
  if (strcmp(arg, "-e") == 0 || strcmp(arg, "--export") == 0)
    return 2;
  if (strcmp(arg, "-m") == 0 || strcmp(arg, "--method") == 0)
    return 3;
  if (strcmp(arg, "-i") == 0 || strcmp(arg, "--input") == 0)
    return 4;
  if (strcmp(arg, "-h") == 0 || strcmp(arg, "--help") == 0)
    return 5;
  if (strcmp(arg, "-d") == 0 || strcmp(arg, "--debug") == 0)
    return 6;
  if (strcmp(arg, "-id") == 0 || strcmp(arg, "--queryid") == 0)
    return 7;
  if (strcmp(arg, "-t") == 0 || strcmp(arg, "--timeout") == 0)
    return 8;
  if (strcmp(arg, "-sd") == 0 || strcmp(arg, "--savedump") == 0)
    return 9;
  if (strcmp(arg, "-sl") == 0 || strcmp(arg, "--slope") == 0)
    return 10;
  if (strcmp(arg, "-o") == 0 || strcmp(arg, "--online") == 0)
    return 11;
  if (strcmp(arg, "-bs") == 0 || strcmp(arg, "--bufsize") == 0)
    return 12;
  if (strcmp(arg, "-pid") == 0 || strcmp(arg, "--pid") == 0)
    return 13;
  return -1;
}

void printhelp(int argc, char **arg) {
  fprintf(stderr, "\nUsage: %s -l [filename] -i [filename] -o (-s(d) "
                  "[filename] -e [filename] -m [method] -id [queryid] -sl "
                  "[double]) (-t [seconds] -d -h)\n",
          arg[0]);
  fprintf(stderr, "Generates and traverses a BDD\nMandatory parameters:\n");
  fprintf(stderr, "\t-l [filename]\t->\tfilename to load supports two "
                  "formats:\n\t\t\t\t\t\t1. script with generation "
                  "instructions\n\t\t\t\t\t\t2. node dump saved file\n");
  fprintf(stderr, "\t-i [filename]\t->\tfilename to input problem specifics "
                  "(mandatory with file formats 1, 2)\n");
  fprintf(stderr, "\t-o\t\t->\tgenerates the BDD in online mode instead from a "
                  "file can be used instead of -l\n");
  fprintf(stderr, "Optional parameters:\n");
  fprintf(stderr, "\t-sd [filename]\t->\tfilename to save generated BDD in "
                  "node dump format (fast loading, traverse valid only)\n");
  fprintf(
      stderr,
      "\t-e [filename]\t->\tfilename to export generated BDD in dot format\n");
  fprintf(stderr, "\t-m [method]\t->\tthe calculation method to be used: "
                  "none(default), [p]robability, [g]radient, [o]nline\n");
  fprintf(stderr, "\t-id [queryid]\t->\tthe queries identity name (used by "
                  "gradient) default: %s\n",
          arg[0]);
  fprintf(stderr, "\t-sl [double]\t->\tthe sigmoid slope (used by gradient) "
                  "default: 1.0\n");
  fprintf(stderr, "Extra parameters:\n");
  fprintf(stderr, "\t-t [seconds]\t->\tthe seconds (int) for BDD generation "
                  "timeout default 0 = no timeout\n");
  fprintf(stderr, "\t-pid [pid]\t->\ta process id (int) to check for "
                  "termination default 0 = no process to check works only "
                  "under POSIX OS\n");
  fprintf(stderr, "\t-bs [bytes]\t->\tthe bytes (int) to use as a maximum "
                  "buffer size to read files default 0 = no max\n");
  fprintf(stderr,
          "\t-d\t\t->\tRun in debug mode (gives extra messages in stderr)\n");
  fprintf(stderr, "\t-h\t\t->\tHelp (displays this message)\n\n");
  fprintf(stderr, "Example: %s -l testbdd -i input.txt -m g -id testbdd\n",
          arg[0]);
}

parameters loadparam(int argc, char **arg) {
  int i;
  parameters params;
  params.loadfile = -1;
  params.savedfile = -1;
  params.exportfile = -1;
  params.method = 0;
  params.inputfile = -1;
  params.debug = 0;
  params.errorcnt = 0;
  params.queryid = 0;
  params.timeout = 0;
  params.sigmoid_slope = 1.0;
  params.online = 0;
  params.maxbufsize = 0;
  params.ppid = NULL;
  params.error = (int *)malloc(argc * sizeof(int));
  for (i = 1; i < argc; i++) {
    switch (argtype(arg[i])) {
    case 0:
      if (argc > i + 1) {
        i++;
        params.loadfile = i;
      } else {
        params.error[params.errorcnt] = i;
        params.errorcnt++;
      }
      break;
    case 2:
      if (argc > i + 1) {
        i++;
        params.exportfile = i;
      } else {
        params.error[params.errorcnt] = i;
        params.errorcnt++;
      }
      break;
    case 3:
      if (argc > i + 1) {
        i++;
        params.method = i;
      } else {
        params.error[params.errorcnt] = i;
        params.errorcnt++;
      }
      break;
    case 4:
      if (argc > i + 1) {
        i++;
        params.inputfile = i;
      } else {
        params.error[params.errorcnt] = i;
        params.errorcnt++;
      }
      break;
    case 5:
      printhelp(argc, arg);
      break;
    case 6:
      params.debug = 1;
      break;
    case 7:
      if (argc > i + 1) {
        i++;
        params.queryid = i;
      } else {
        params.error[params.errorcnt] = i;
        params.errorcnt++;
      }
      break;
    case 8:
      if ((argc > i + 1) && (IsPosNumber(arg[i + 1]))) {
        i++;
        params.timeout = atoi(arg[i]);
      } else {
        params.error[params.errorcnt] = i;
        params.errorcnt++;
      }
      break;
    case 9:
      if (argc > i + 1) {
        i++;
        params.savedfile = i;
      } else {
        params.error[params.errorcnt] = i;
        params.errorcnt++;
      }
      break;
    case 10:
      if ((argc > i + 1) && (IsRealNumber(arg[i + 1]))) {
        i++;
        params.sigmoid_slope = atof(arg[i]);
      } else {
        params.error[params.errorcnt] = i;
        params.errorcnt++;
      }
      break;
    case 11:
      params.online = 1;
      break;
    case 12:
      if ((argc > i + 1) && (IsPosNumber(arg[i + 1]))) {
        i++;
        params.maxbufsize = atoi(arg[i]);
      } else {
        params.error[params.errorcnt] = i;
        params.errorcnt++;
      }
      break;
    case 13:
      if ((argc > i + 1) && (IsPosNumber(arg[i + 1]))) {
        i++;
        params.ppid = (char *)malloc(sizeof(char) * (strlen(arg[i]) + 1));
        strcpy(params.ppid, arg[i]);
      } else {
        params.error[params.errorcnt] = i;
        params.errorcnt++;
      }
      break;
    default:
      params.error[params.errorcnt] = i;
      params.errorcnt++;
      break;
    }
  }
  return params;
}

/* Error Handlers */

void handler(int num) {
  fprintf(stderr, "Error: Timeout %i exceeded.\n", params.timeout);
  exit(-1);
}

void pidhandler(int num) {
  char *s;
  if (params.timeout > 0) {
    params.timeout -= 5;
    if (params.timeout <= 0) {
      fprintf(stderr, "Error: Timeout exceeded.\n");
      exit(-1);
    }
  }
  s = (char *)malloc(sizeof(char) * (19 + strlen(params.ppid)));
  strcpy(s, "ps ");
  strcat(s, params.ppid);
  strcat(s, " >/dev/null");
  if (system(s) != 0)
    exit(4);
#ifndef _WIN32
  signal(SIGALRM, pidhandler);
  alarm(5);
#endif
  free(s);
}

void termhandler(int num) { exit(3); }

/* General Functions */

double sigmoid(double x, double slope) { return 1 / (1 + exp(-x * slope)); }

/* Debugging traverse function */

void myexpand(extmanager MyManager, DdNode *Current) {
  DdNode *h, *l;
  hisnode *Found;
  char *curnode;
  curnode = GetNodeVarNameDisp(MyManager.manager, MyManager.varmap, Current);
  printf("%s\n", curnode);
  if ((Current != MyManager.t) && (Current != MyManager.f) &&
      ((Found = GetNode(MyManager.his, MyManager.varmap.varstart, Current)) ==
       NULL)) {
    l = LowNodeOf(MyManager.manager, Current);
    h = HighNodeOf(MyManager.manager, Current);
    printf("l(%s)->", curnode);
    myexpand(MyManager, l);
    printf("h(%s)->", curnode);
    myexpand(MyManager, h);
    AddNode(MyManager.his, MyManager.varmap.varstart, Current, 0.0, 0, NULL);
  }
}

/* Angelikas Algorithm */

double CalcProbability(extmanager MyManager, DdNode *Current) {
  DdNode *h, *l;
  hisnode *Found;
  char *curnode;
  double lvalue, hvalue, tvalue;
  if (params.debug) {
    curnode = GetNodeVarNameDisp(MyManager.manager, MyManager.varmap, Current);
    fprintf(stderr, "%s\n", curnode);
  }
  if (Current == MyManager.t)
    return 1.0;
  if (Current == MyManager.f)
    return 0.0;
  if ((Found = GetNode(MyManager.his, MyManager.varmap.varstart, Current)) !=
      NULL)
    return Found->dvalue;
  l = LowNodeOf(MyManager.manager, Current);
  h = HighNodeOf(MyManager.manager, Current);
  if (params.debug)
    fprintf(stderr, "l(%s)->", curnode);
  lvalue = CalcProbability(MyManager, l);
  if (params.debug)
    fprintf(stderr, "h(%s)->", curnode);
  hvalue = CalcProbability(MyManager, h);
  tvalue =
      MyManager.varmap.dvalue[GetIndex(Current) - MyManager.varmap.varstart];
  tvalue = tvalue * hvalue + lvalue * (1.0 - tvalue);
  AddNode(MyManager.his, MyManager.varmap.varstart, Current, tvalue, 0, NULL);
  return tvalue;
}

/* Bernds Algorithm */

gradientpair CalcGradient(extmanager MyManager, DdNode *Current, int TargetVar,
                          char *TargetPattern) {
  DdNode *h, *l;
  hisnode *Found;
  char *curnode;
  gradientpair lvalue, hvalue, tvalue;
  double this_probability;
  double *gradient;
  if (params.debug) {
    curnode = GetNodeVarNameDisp(MyManager.manager, MyManager.varmap, Current);
    fprintf(stderr, "%s\n", curnode);
  }
  if (Current == MyManager.t) {
    tvalue.probability = 1.0;
    tvalue.gradient = 0.0;
    return tvalue;
  }
  if (Current == MyManager.f) {
    tvalue.probability = 0.0;
    tvalue.gradient = 0.0;
    return tvalue;
  }
  if ((Found = GetNode(MyManager.his, MyManager.varmap.varstart, Current)) !=
      NULL) {
    tvalue.probability = Found->dvalue;
    tvalue.gradient = *((double *)Found->dynvalue);
    return tvalue;
  }
  l = LowNodeOf(MyManager.manager, Current);
  h = HighNodeOf(MyManager.manager, Current);
  if (params.debug)
    fprintf(stderr, "l(%s)->", curnode);
  lvalue = CalcGradient(MyManager, l, TargetVar, TargetPattern);
  if (params.debug)
    fprintf(stderr, "h(%s)->", curnode);
  hvalue = CalcGradient(MyManager, h, TargetVar, TargetPattern);
  this_probability = sigmoid(
      MyManager.varmap.dvalue[GetIndex(Current) - MyManager.varmap.varstart],
      params.sigmoid_slope);
  tvalue.probability = this_probability * hvalue.probability +
                       (1 - this_probability) * lvalue.probability;
  tvalue.gradient = this_probability * hvalue.gradient +
                    (1 - this_probability) * lvalue.gradient;
  if ((GetIndex(Current) == TargetVar) ||
      ((TargetPattern != NULL) &&
       patternmatch(TargetPattern, MyManager.varmap.vars[GetIndex(Current)]))) {
    tvalue.gradient += hvalue.probability - lvalue.probability;
  }
  gradient = (double *)malloc(sizeof(double));
  *gradient = tvalue.gradient;
  AddNode(MyManager.his, MyManager.varmap.varstart, Current, tvalue.probability,
          0, gradient);
  return tvalue;
}

char *extractpattern(char *thestr) {
  char *p;
  int i = 0, sl = strlen(thestr);
  while ((thestr[i] != '_') && (i < sl))
    i++;
  if (i == sl)
    return NULL;
  i++;
  p = (char *)malloc(sizeof(char) * (i + 2));
  strncpy(p, thestr, i);
  p[i] = '*';
  p[i + 1] = '\0';
  return p;
}

int patterncalculated(char *pattern, extmanager MyManager, int loc) {
  int i;
  if (pattern == NULL)
    return 0;
  for (i = loc - 1; i > -1; i--)
    if (patternmatch(pattern, MyManager.varmap.vars[i]))
      return 1;
  return 0;
}

double Prob(extmanager MyManager, DdNode *node, int comp)
/* compute the probability of the expression rooted at node
nodes is used to store nodes for which the probability has alread been computed
so that it is not recomputed
 */
{
  int mVarIndex, nBit, index;
  variable v;
  hisnode *Found;
  double res;
  double value;

  if (Cudd_IsConstant(node)) {
    value = Cudd_V(node);
    if (comp) {
      return 0.0;
    } else {
      return 1.0;
    }
  } else {
    Found = GetNode1(MyManager.varmap.bVar2mVar, MyManager.his,
                     MyManager.varmap.varstart, node);

    if (Found != NULL) {
      return Found->dvalue;
    } else {
      index = Cudd_NodeReadIndex(node);
      mVarIndex = MyManager.varmap.bVar2mVar[index];
      v = MyManager.varmap.mvars[mVarIndex];
      nBit = v.nBit;
      res = ProbBool(MyManager, node, 0, nBit, 0, v, comp);
      AddNode1(MyManager.varmap.bVar2mVar, MyManager.his,
               MyManager.varmap.varstart, node, res, 0, NULL);
      return res;
    }
  }
}

double ProbBool(extmanager MyManager, DdNode *node, int bits, int nBit,
                int posBVar, variable v, int comp)
/* explores a group of binary variables making up the multivalued variable v */
{
  DdNode *T, *F;
  double p, res;
  double *probs;
  int index;
  probs = v.probabilities;
  if (nBit == 0) {
    if (bits >= v.nVal) {
      return 0.0;
    } else {
      p = probs[bits];
      res = p * Prob(MyManager, node, comp);
      return res;
    }
  } else {
    index = Cudd_NodeReadIndex(node);
    if (correctPosition(index, v, posBVar)) {
      T = Cudd_T(node);
      F = Cudd_E(node);
      bits = bits << 1;
      res = ProbBool(MyManager, T, bits + 1, nBit - 1, posBVar + 1, v, comp);
      comp = (!comp && Cudd_IsComplement(F)) || (comp && !Cudd_IsComplement(F));
      res = res + ProbBool(MyManager, F, bits, nBit - 1, posBVar + 1, v, comp);
      return res;
    } else {
      bits = bits << 1;
      res = ProbBool(MyManager, node, bits + 1, nBit - 1, posBVar + 1, v, comp);
      res =
          res + ProbBool(MyManager, node, bits, nBit - 1, posBVar + 1, v, comp);
      return res;
    }
  }
}

int correctPosition(int index, variable v, int posBVar)
/* returns 1 is the boolean variable with index posBVar is in the correct
position
currently explored by ProbBool */
{
  int bvar;
  bvar = v.booleanVars[posBVar];

  return (bvar == index);
}

double ret_prob(extmanager MyManager, DdNode *bdd) {
  double prob;
  /* dividend is a global variable used by my_hash
     it is equal to an unsigned int with binary representation 11..1 */
  prob = Prob(MyManager, bdd, Cudd_IsComplement(bdd));

  return prob;
}