bload.c

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           }
         else
           objsmaxread /= 2;
        }
     }
   while (buf == NULL);

   EnvSetOutOfMemoryFunction(theEnv,oldOutOfMemoryFunction);

   i = 0L;
   do
     {
      objsread = (objsmaxread > (objcnt - i)) ? (objcnt - i) : objsmaxread;
      GenReadBinary(theEnv,(void *) buf,objsread * objsz);
      for (bi = 0L ; bi < objsread ; bi++ , i++)
        (*objupdate)(theEnv,buf + objsz * bi,i);
     }
   while (i < objcnt);
   genlongfree(theEnv,(void *) buf,space);
  }

/**********************************************/
/* ReadNeededFunctions: Reads in the names of */
/*   functions needed by the binary image.    */
/**********************************************/
static struct FunctionDefinition **ReadNeededFunctions(
  void *theEnv,
  long int *numberOfFunctions,
  int *error)
  {
   char *functionNames, *namePtr;
   unsigned long int space,temp;
   long i;
   struct FunctionDefinition **newFunctionArray, *functionPtr;
   int functionsNotFound = 0;

   /*===================================================*/
   /* Determine the number of function names to be read */
   /* and the space required for them.                  */
   /*===================================================*/

   GenReadBinary(theEnv,numberOfFunctions,(unsigned long) sizeof(long int));
   GenReadBinary(theEnv,&space,(unsigned long) sizeof(unsigned long int));
   if (*numberOfFunctions == 0)
     {
      *error = FALSE;
      return(NULL);
     }

   /*=======================================*/
   /* Allocate area for strings to be read. */
   /*=======================================*/

   functionNames = (char *) genlongalloc(theEnv,space);
   GenReadBinary(theEnv,(void *) functionNames,space);

   /*====================================================*/
   /* Store the function pointers in the function array. */
   /*====================================================*/

   temp = (unsigned long) sizeof(struct FunctionDefinition *) * *numberOfFunctions;
   newFunctionArray = (struct FunctionDefinition **) genlongalloc(theEnv,temp);
   namePtr = functionNames;
   functionPtr = NULL;
   for (i = 0; i < *numberOfFunctions; i++)
     {
      if ((functionPtr = FastFindFunction(theEnv,namePtr,functionPtr)) == NULL)
        {
         if (! functionsNotFound)
           {
            PrintErrorID(theEnv,"BLOAD",6,FALSE);
            EnvPrintRouter(theEnv,WERROR,"The following undefined functions are ");
            EnvPrintRouter(theEnv,WERROR,"referenced by this binary image:\n");
           }

         EnvPrintRouter(theEnv,WERROR,"   ");
         EnvPrintRouter(theEnv,WERROR,namePtr);
         EnvPrintRouter(theEnv,WERROR,"\n");
         functionsNotFound = 1;
        }

      newFunctionArray[i] = functionPtr;
      namePtr += strlen(namePtr) + 1;
     }

   /*==========================================*/
   /* Free the memory used by the name buffer. */
   /*==========================================*/

   genlongfree(theEnv,(void *) functionNames,space);

   /*==================================================*/
   /* If any of the required functions were not found, */
   /* then free the memory used by the function array. */
   /*==================================================*/

   if (functionsNotFound)
     {
      genlongfree(theEnv,(void *) newFunctionArray,temp);
      newFunctionArray = NULL;
     }

   /*===================================*/
   /* Set globals to appropriate values */
   /* and return the function array.    */
   /*===================================*/

   *error = functionsNotFound;
   return(newFunctionArray);
  }

/*****************************************/
/* FastFindFunction: Search the function */
/*   list for a specific function.       */
/*****************************************/
static struct FunctionDefinition *FastFindFunction(
  void *theEnv,
  char *functionName,
  struct FunctionDefinition *lastFunction)
  {
   struct FunctionDefinition *theList, *theFunction;

   /*========================*/
   /* Get the function list. */
   /*========================*/

   theList = GetFunctionList(theEnv);
   if (theList == NULL) { return(NULL); }

   /*=======================================*/
   /* If we completed a previous function   */
   /* search, start where we last left off. */
   /*=======================================*/

   if (lastFunction != NULL)
     { theFunction = lastFunction->next; }
   else
     { theFunction = theList; }

   /*======================================================*/
   /* Traverse the rest of the function list searching for */
   /* the named function wrapping around if necessary.     */
   /*======================================================*/

   while (strcmp(functionName,ValueToString(theFunction->callFunctionName)) != 0)
     {
      theFunction = theFunction->next;
      if (theFunction == lastFunction) return(NULL);
      if (theFunction == NULL) theFunction = theList;
     }

   /*=======================*/
   /* Return the pointer to */
   /* the found function.   */
   /*=======================*/

   return(theFunction);
  }

/******************************************/
/* Bloaded: Returns TRUE if the current   */
/*   environment is the result of a bload */
/*   command, otherwise returns FALSE.    */
/******************************************/
globle intBool Bloaded(
  void *theEnv)
  {
   return(BloadData(theEnv)->BloadActive);
  }

/*************************************/
/* ClearBload: Clears a binary image */
/*   from the KB environment.        */
/*************************************/
static int ClearBload(
  void *theEnv)
  {
   struct BinaryItem *biPtr;
   struct callFunctionItem *bfPtr;
   int ready,error;

   /*=================================================*/
   /* Make sure it's safe to clear the bloaded image. */
   /*=================================================*/

   error = FALSE;
   for (bfPtr = BloadData(theEnv)->ClearBloadReadyFunctions;
        bfPtr != NULL;
        bfPtr = bfPtr->next)
     {
      if (bfPtr->environmentAware)
        { ready = (* ((int (*)(void *)) bfPtr->func))(theEnv); }
      else            
        { ready = (* ((int (*)(void)) bfPtr->func))(); }

      if (ready == FALSE)
        {
         if (! error)
           {
            PrintErrorID(theEnv,"BLOAD",5,FALSE);
            EnvPrintRouter(theEnv,WERROR,
                       "Some constructs are still in use by the current binary image:\n");
           }
         EnvPrintRouter(theEnv,WERROR,"   ");
         EnvPrintRouter(theEnv,WERROR,bfPtr->name);
         EnvPrintRouter(theEnv,WERROR,"\n");
         error = TRUE;
        }
     }

   /*==================================================*/
   /* If some constructs are still in use and can't be */
   /* cleared, indicate the binary load can't continue */
   /* and return FALSE to indicate this condition.     */
   /*==================================================*/

   if (error == TRUE)
     {
      EnvPrintRouter(theEnv,WERROR,"Binary clear cannot continue.\n");
      return(FALSE);
     }

   /*=============================*/
   /* Call bload clear functions. */
   /*=============================*/

   for (biPtr = BsaveData(theEnv)->ListOfBinaryItems;
        biPtr != NULL;
        biPtr = biPtr->next)
     { if (biPtr->clearFunction != NULL) (*biPtr->clearFunction)(theEnv); }

   /*===========================*/
   /* Free bloaded expressions. */
   /*===========================*/

   ClearBloadedExpressions(theEnv);

   /*===========================*/
   /* Free bloaded constraints. */
   /*===========================*/

   ClearBloadedConstraints(theEnv);

   /*==================================*/
   /* Remove the bload clear function. */
   /*==================================*/

   BloadData(theEnv)->BloadActive = FALSE;
   EnvRemoveClearFunction(theEnv,"bload");

   /*====================================*/
   /* Return TRUE to indicate the binary */
   /* image was successfully cleared.    */
   /*====================================*/

   return(TRUE);
  }

/*************************************************/
/* AbortBload: Cleans up effects of before-bload */
/*   functions in event of failure.              */
/*************************************************/
static void AbortBload(
  void *theEnv)
  {
   struct callFunctionItem *bfPtr;

   for (bfPtr = BloadData(theEnv)->AbortBloadFunctions;
        bfPtr != NULL;
        bfPtr = bfPtr->next)
     { 
      if (bfPtr->environmentAware)
        { (*bfPtr->func)(theEnv); }
      else            
        { (* (void (*)(void)) bfPtr->func)(); }
     }
  }

/********************************************/
/* AddBeforeBloadFunction: Adds a function  */
/*   to the list of functions called before */
/*   a binary load occurs.                  */
/********************************************/
globle void AddBeforeBloadFunction(
  void *theEnv,
  char *name,
  void (*func)(void *),
  int priority)
  {
   BloadData(theEnv)->BeforeBloadFunctions =
     AddFunctionToCallList(theEnv,name,priority,func,BloadData(theEnv)->BeforeBloadFunctions,TRUE);
  }

/*******************************************/
/* AddAfterBloadFunction: Adds a function  */
/*   to the list of functions called after */
/*   a binary load occurs.                 */
/*******************************************/
globle void AddAfterBloadFunction(
  void *theEnv,
  char *name,
  void (*func)(void *),
  int priority)
  {
   BloadData(theEnv)->AfterBloadFunctions =
      AddFunctionToCallList(theEnv,name,priority,func,BloadData(theEnv)->AfterBloadFunctions,TRUE);
  }

/**************************************************/
/* AddClearBloadReadyFunction: Adds a function to */
/*   the list of functions called to determine if */
/*   a binary image can be cleared.               */
/**************************************************/
globle void AddClearBloadReadyFunction(
  void *theEnv,
  char *name,
  int (*func)(void *),
  int priority)
  {
   BloadData(theEnv)->ClearBloadReadyFunctions =
      AddFunctionToCallList(theEnv,name,priority,
                            (void (*)(void *)) func,
                            BloadData(theEnv)->ClearBloadReadyFunctions,TRUE);
  }

/*********************************************/
/* AddAbortBloadFunction: Adds a function to */
/*   the list of functions called if a bload */
/*   has to be aborted.                      */
/*********************************************/
globle void AddAbortBloadFunction(
  void *theEnv,
  char *name,
  void (*func)(void *),
  int priority)
  {
   BloadData(theEnv)->AbortBloadFunctions = AddFunctionToCallList(theEnv,name,priority,func,BloadData(theEnv)->AbortBloadFunctions,TRUE);
  }

/*******************************************************
  NAME         : BloadOutOfMemoryFunction
  DESCRIPTION  : Memory function used by bload to
                   prevent exiting when out of
                   memory - used by BloadandRefresh
  INPUTS       : The memory request size (unused)
  RETURNS      : TRUE (indicates a failure and for
                 the memory functions to simply
                 return a NULL pointer)
  SIDE EFFECTS : None
  NOTES        : None
 *******************************************************/
#if IBM_TBC
#pragma argsused
#endif
static int BloadOutOfMemoryFunction(
  void *theEnv,
  unsigned long size)
  {
#if MAC_MCW || IBM_MCW || MAC_XCD
#pragma unused(size,theEnv)
#endif
   return(TRUE);
  }

/*****************************************************/
/* CannotLoadWithBloadMessage: Generic error message */
/*   for indicating that a construct can't be loaded */
/*   when a binary image is active.                  */
/*****************************************************/
globle void CannotLoadWithBloadMessage(
  void *theEnv,
  char *constructName)
  {
   PrintErrorID(theEnv,"BLOAD",1,TRUE);
   EnvPrintRouter(theEnv,WERROR,"Cannot load ");
   EnvPrintRouter(theEnv,WERROR,constructName);
   EnvPrintRouter(theEnv,WERROR," construct with binary load in effect.\n");
  }

#endif /* (BLOAD || BLOAD_ONLY || BLOAD_AND_BSAVE) */

/**************************************/
/* BloadCommand: H/L access routine   */
/*   for the bload command.           */
/**************************************/
globle int BloadCommand(
  void *theEnv)
  {
#if (! RUN_TIME) && (BLOAD || BLOAD_ONLY || BLOAD_AND_BSAVE)
   char *fileName;

   if (EnvArgCountCheck(theEnv,"bload",EXACTLY,1) == -1) return(FALSE);
   fileName = GetFileName(theEnv,"bload",1);
   if (fileName != NULL) return(EnvBload(theEnv,fileName));
#else
#if MAC_MCW || IBM_MCW || MAC_XCD
#pragma unused(theEnv)
#endif
#endif
   return(FALSE);
  }