iofun.c

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         start_pos = form_pos;
         form_pos++;
         formatFlagType = FindFormatFlag(formatString,&form_pos,buffer,&longFound);
         if (formatFlagType != ' ')
           {
            strncpy(percentBuffer,&formatString[start_pos],
                    (STD_SIZE) form_pos-start_pos);
            percentBuffer[form_pos-start_pos] = EOS;
            if ((! longFound) &&
                ((formatFlagType == 'd') || (formatFlagType == 'o') ||
                 (formatFlagType == 'u') || (formatFlagType == 'x')))
              {
               longFound = TRUE;
               percentBuffer[(form_pos-start_pos) - 1] = 'l';
               percentBuffer[form_pos-start_pos] = formatFlagType;
               percentBuffer[(form_pos-start_pos) + 1] = EOS;
              }

            if ((theString = PrintFormatFlag(theEnv,percentBuffer,f_cur_arg,formatFlagType,longFound)) == NULL)
              {
               if (fstr != NULL) rm(theEnv,fstr,fmaxm);
               return (hptr);
              }
            fstr = AppendToString(theEnv,theString,fstr,&fpos,&fmaxm);
            if (fstr == NULL) return(hptr);
            f_cur_arg++;
           }
         else
           {
            fstr = AppendToString(theEnv,buffer,fstr,&fpos,&fmaxm);
            if (fstr == NULL) return(hptr);
           }
        }
     }

   if (fstr != NULL)
     {
      hptr = EnvAddSymbol(theEnv,fstr);
      if (strcmp(logicalName,"nil") != 0) EnvPrintRouter(theEnv,logicalName,fstr);
      rm(theEnv,fstr,fmaxm);
     }
   else
     { hptr = EnvAddSymbol(theEnv,""); }

   return(hptr);
  }

/*********************************************************************/
/* ControlStringCheck:  Checks the 2nd parameter which is the format */
/*   control string to see if there are enough matching arguments.   */
/*********************************************************************/
static char *ControlStringCheck(
  void *theEnv,
  int argCount)
  {
   DATA_OBJECT t_ptr;
   char *str_array;
   char print_buff[10];
   int longFound;
   unsigned i;
   int per_count;

   if (EnvArgTypeCheck(theEnv,"format",2,STRING,&t_ptr) == FALSE) return(NULL);

   per_count = 0;
   str_array = ValueToString(t_ptr.value);
   for (i= 0 ; str_array[i] != '\0' ; )
     {
      if (str_array[i] == '%')
        {
         i++;
         if (FindFormatFlag(str_array,&i,print_buff,&longFound) != ' ')
           { per_count++; }
        }
      else
        { i++; }
     }

   if (per_count != (argCount - 2))
     {
      ExpectedCountError(theEnv,"format",EXACTLY,per_count+2);
      SetEvaluationError(theEnv,TRUE);
      return (NULL);
     }

   return(str_array);
  }

/***********************************************/
/* FindFormatFlag:  This function searches for */
/*   a format flag in the format string.       */
/***********************************************/
static char FindFormatFlag(
  char *formatString,
  unsigned *a,
  char *formatBuffer,
  int *longFound)
  {
   char inchar, formatFlagType;
   unsigned start_pos, copy_pos = 0;

   /*===========================================================*/
   /* Set return values to the default value. A blank character */
   /* indicates that no format flag was found which requires a  */
   /* parameter. The longFound flag indicates whether the       */
   /* character 'l' was used with the float or integer flag to  */
   /* indicate a double precision float or a long integer.      */
   /*===========================================================*/

   formatFlagType = ' ';
   *longFound = FALSE;

   /*=====================================================*/
   /* The format flags for carriage returns, line feeds,  */
   /* horizontal and vertical tabs, and the percent sign, */
   /* do not require a parameter.                         */
   /*=====================================================*/

   if (formatString[*a] == 'n')
     {
      sprintf(formatBuffer,"\n");
      (*a)++;
      return(formatFlagType);
     }
   else if (formatString[*a] == 'r')
     {
      sprintf(formatBuffer,"\r");
      (*a)++;
      return(formatFlagType);
     }
   else if (formatString[*a] == 't')
     {
      sprintf(formatBuffer,"\t");
      (*a)++;
      return(formatFlagType);
     }
   else if (formatString[*a] == 'v')
     {
      sprintf(formatBuffer,"\v");
      (*a)++;
      return(formatFlagType);
     }
   else if (formatString[*a] == '%')
     {
      sprintf(formatBuffer,"%%");
      (*a)++;
      return(formatFlagType);
     }

   /*======================================================*/
   /* Identify the format flag which requires a parameter. */
   /*======================================================*/

   start_pos = *a;
   formatBuffer[copy_pos] = '\0';
   while ((formatString[*a] != '%') &&
          (formatString[*a] != '\0') &&
          ((*a - start_pos) < FLAG_MAX))
     {
      inchar = formatString[*a];
      formatBuffer[copy_pos++] = inchar;
      formatBuffer[copy_pos] = '\0';
      if ( (inchar == 'd') ||
           (inchar == 'o') ||
           (inchar == 'x') ||
           (inchar == 'u') ||
           (inchar == 'c') ||
           (inchar == 's') ||
           (inchar == 'e') ||
           (inchar == 'f') ||
           (inchar == 'g') )
        {
         formatFlagType = inchar;
         if (formatString[(*a) - 1] == 'l')
           { *longFound = TRUE; }
         (*a)++;
         return(formatFlagType);
        }
      (*a)++;
     }

   return(formatFlagType);
  }

/**********************************************************************/
/* PrintFormatFlag:  Prints out part of the total format string along */
/*   with the argument for that part of the format string.            */
/**********************************************************************/
static char *PrintFormatFlag(
  void *theEnv,
  char *formatString,
  int whichArg,
  int formatType,
  int longFound)
  {
   DATA_OBJECT theResult;
   char *theString, *printBuffer;
   unsigned theLength;
   void *oldLocale;
      
   /*=================*/
   /* String argument */
   /*=================*/

   switch (formatType)
     {
      case 's':
        if (EnvArgTypeCheck(theEnv,"format",whichArg,SYMBOL_OR_STRING,&theResult) == FALSE) return(NULL);
        theLength = strlen(formatString) + strlen(ValueToString(theResult.value)) + 200;
        printBuffer = (char *) gm2(theEnv,(sizeof(char) * theLength));
        sprintf(printBuffer,formatString,ValueToString(theResult.value));
        break;

      case 'c':
        EnvRtnUnknown(theEnv,whichArg,&theResult);
        if ((GetType(theResult) == STRING) ||
            (GetType(theResult) == SYMBOL))
          {
           theLength = strlen(formatString) + 200;
           printBuffer = (char *) gm2(theEnv,(sizeof(char) * theLength));
           sprintf(printBuffer,formatString,(ValueToString(theResult.value))[0]);
          }
        else if (GetType(theResult) == INTEGER)
          {
           theLength = strlen(formatString) + 200;
           printBuffer = (char *) gm2(theEnv,(sizeof(char) * theLength));
           sprintf(printBuffer,formatString,(char) DOToLong(theResult));
          }
        else
          {
           ExpectedTypeError1(theEnv,"format",whichArg,"symbol, string, or integer");
           return(NULL);
          }
        break;

      case 'd':
      case 'x':
      case 'o':
      case 'u':
        if (EnvArgTypeCheck(theEnv,"format",whichArg,INTEGER_OR_FLOAT,&theResult) == FALSE) return(NULL);
        theLength = strlen(formatString) + 200;
        printBuffer = (char *) gm2(theEnv,(sizeof(char) * theLength));
        
        oldLocale = EnvAddSymbol(theEnv,setlocale(LC_NUMERIC,NULL));
        setlocale(LC_NUMERIC,ValueToString(IOFunctionData(theEnv)->locale));

        if (GetType(theResult) == FLOAT)
          {
           if (longFound)
             { sprintf(printBuffer,formatString,(long) ValueToDouble(theResult.value)); }
           else
             { sprintf(printBuffer,formatString,(int) ValueToDouble(theResult.value)); }
          }
        else
          {
           if (longFound)
             { sprintf(printBuffer,formatString,(long) ValueToLong(theResult.value)); }
           else
             { sprintf(printBuffer,formatString,(int) ValueToLong(theResult.value)); }
          }
          
        setlocale(LC_NUMERIC,ValueToString(oldLocale));
        break;

      case 'f':
      case 'g':
      case 'e':
        if (EnvArgTypeCheck(theEnv,"format",whichArg,INTEGER_OR_FLOAT,&theResult) == FALSE) return(NULL);
        theLength = strlen(formatString) + 200;
        printBuffer = (char *) gm2(theEnv,(sizeof(char) * theLength));

        oldLocale = EnvAddSymbol(theEnv,setlocale(LC_NUMERIC,NULL));
        
        setlocale(LC_NUMERIC,ValueToString(IOFunctionData(theEnv)->locale));

        if (GetType(theResult) == FLOAT)
          { sprintf(printBuffer,formatString,ValueToDouble(theResult.value)); }
        else
          { sprintf(printBuffer,formatString,(double) ValueToLong(theResult.value)); }
        
        setlocale(LC_NUMERIC,ValueToString(oldLocale));
        
        break;

      default:
         EnvPrintRouter(theEnv,WERROR," Error in format, the conversion character");
         EnvPrintRouter(theEnv,WERROR," for formatted output is not valid\n");
         return(FALSE);
     }

   theString = ValueToString(EnvAddSymbol(theEnv,printBuffer));
   rm(theEnv,printBuffer,sizeof(char) * theLength);
   return(theString);
  }

/******************************************/
/* ReadlineFunction: H/L access routine   */
/*   for the readline function.           */
/******************************************/
globle void ReadlineFunction(
  void *theEnv,
  DATA_OBJECT_PTR returnValue)
  {
   char *buffer;
   unsigned line_max = 0;
   int numberOfArguments;
   char *logicalName;

   returnValue->type = STRING;

   if ((numberOfArguments = EnvArgCountCheck(theEnv,"readline",NO_MORE_THAN,1)) == -1)
     {
      returnValue->value = (void *) EnvAddSymbol(theEnv,"*** READ ERROR ***");
      return;
     }

   if (numberOfArguments == 0 )
     { logicalName = "stdin"; }
   else
     {
      logicalName = GetLogicalName(theEnv,1,"stdin");
      if (logicalName == NULL)
        {
         IllegalLogicalNameMessage(theEnv,"readline");
         SetHaltExecution(theEnv,TRUE);
         SetEvaluationError(theEnv,TRUE);
         returnValue->value = (void *) EnvAddSymbol(theEnv,"*** READ ERROR ***");
         return;
        }
     }

   if (QueryRouters(theEnv,logicalName) == FALSE)
     {
      UnrecognizedRouterMessage(theEnv,logicalName);
      SetHaltExecution(theEnv,TRUE);
      SetEvaluationError(theEnv,TRUE);
      returnValue->value = (void *) EnvAddSymbol(theEnv,"*** READ ERROR ***");
      return;
     }

   RouterData(theEnv)->CommandBufferInputCount = 0;
   buffer = FillBuffer(theEnv,logicalName,&RouterData(theEnv)->CommandBufferInputCount,&line_max);
   RouterData(theEnv)->CommandBufferInputCount = -1;

   if (GetHaltExecution(theEnv))
     {
      returnValue->value = (void *) EnvAddSymbol(theEnv,"*** READ ERROR ***");
      if (buffer != NULL) rm(theEnv,buffer,(int) sizeof (char) * line_max);
      return;
     }

   if (buffer == NULL)
     {
      returnValue->value = (void *) EnvAddSymbol(theEnv,"EOF");
      returnValue->type = SYMBOL;
      return;
     }