#=====================================================
# IntObjType.tcl 
# *
# * ALDT (Arnulf's Latex Documentation Tool)
# * A Tcl parser for LaTeX files for generating document output (for example html)
# *
# * Obj type for handling integers
# *
# * Released under same BSD license as Tcl.
# * (Tcl BSD license found at <http://www.tcl.tk/software/tcltk/license.html>)
# *
# * Copyright 2012 Arnulf P. Wiedemann
#=====================================================

namespace eval ::Parser {

::itcl::class IntObjType {
  private common oid 0

  public variable id

  constructor {} {}
  public method mySelf {}
  public method toString {}
  public method toDebugString {}
  public method setFromAny {obj_ptr flags}
  public method updateString {obj_ptr}
  public method newIntObj {val}
  public method getBool {obj_ptr bool_ptr}
}

  # ==================== constructor ==================================
::itcl::body IntObjType::constructor {} {
    incr oid
    set id $oid
  }

  # ==================== mySelf ==================================
::itcl::body IntObjType::mySelf {} {
    set str "IntObjType!$id!"
    return $str;
  } 
      
  # ==================== toString =====================================
::itcl::body IntObjType::toString {} {
    return "[mySelf]!"
  }

  # ==================== toDebugString ===================================== 
::itcl::body IntObjType::toDebugString {} {
    set str "[mySelf]\n"
    return $str
  }

  # ==================== setFromAny ==================================
::itcl::body IntObjType::setFromAny {obj_ptr flags} {

    if {[$obj_ptr getObjType] > 0 && [$obj_ptr getObjType] == [::Interp::string2ObjType OBJ_TYPE_COERCED_DOUBLE]} {
      # Simple switcheroo 
      $obj_ptr setObjType [::Interp::string2ObjType OBJ_TYPE_INT]
      return true
    }

    /* Get the string representation */
    str = obj_ptr.getString();
    /* Try to convert into a wide */
    if (stringToWide(str, wide_value, 0) != OK) {
      if ((flags & FUNCTION_FLAGS_LEAVE_ERR_MSG) != 0) {
        interp.setResultFormatted("expected integer but got \"%#s\"", obj_ptr);
      }
      return ERROR;
    }
    // FIXME!!! have to find out how to determine WIDE_MIN and WIDE_MAX values!!!
//    if ((wideValue == WIDE_MIN || wideValue == WIDE_MAX) && errno == ERANGE) {
//      int_obj.interp.setResultString("Integer value too big to be represented", -1);
//      return int_obj.ERROR;
//    }
    /* Free the old internal repr and set the new one. */
    obj_ptr.freeIntRep();
    obj_ptr.obj_type = OBJ_TYPE_INT;
    obj_ptr.wideValue_SetValue(wide_value.get(0));
    return OK;
  }

  # ==================== updateString =====================================
::itcl::body IntObjType::updateString {obj_ptr} {
    set str [list]
    set len [list]

    set ret_code = wideToString(obj_ptr.wideValue_GetValue(), str, len);
    if (obj_ptr.bytes == null) {
      obj_ptr.bytes = new StringBuffer();  
    }
    obj_ptr.bytes.append(str.get(0));
    obj_ptr.len = len.get(0);
    return ret_code;
  }

  # ==================== newIntObj ==================================
::itcl::body IntObjType::newIntObj {val} {
    set obj_ptr [$::Interp::default_obj newObj]
    $obj_ptr setObjType [::Interp::string2ObjType OBJ_TYPE_INT]
    $obj_ptr setLen 0
    $obj_ptr setBytes ""
    $obj_ptr wideValue_SetValue $val
    return obj_ptr;
  }

if {0} {
  /* ==================== wideToString ===================================== */
::itcl::body IntObjType::  public int wideToString(long wide_value, ArrayList<String> str_ptr, ArrayList<Integer> len_ptr) {
    String str = String.valueOf(wide_value);

    str_ptr.add(str);
    len_ptr.add(str.length());
    return OK;
  }

  /* ==================== stringToWide ================================== */
::itcl::body IntObjType::  public long stringToWide(String val, ArrayList<Long> result, int flags) {
	try {
      result.add(Long.parseLong(val));
	} catch(Exception e) {
	  return ERROR;
	}
    return checkConversion(Long.parseLong(val), result.get(0));
  }

  /* ==================== wideValue ================================== */
  public long wideValue(ApwtclObj obj_ptr) {
    return obj_ptr.wideValue_GetValue();
  }

  /* ==================== getWide ================================== */
::itcl::body IntObjType::  public int getWide(ApwtclObj obj_ptr, ArrayList<Long> wide_ptr) {
    if ((obj_ptr.obj_type != OBJ_TYPE_INT) && (setFromAny(obj_ptr, FUNCTION_FLAGS_LEAVE_ERR_MSG) == ERROR)) {
      return ERROR;
    }
    wide_ptr.add(wideValue(obj_ptr));
    return OK;
  }

  /* ==================== getWideNoErr ================================== */
::itcl::body IntObjType::  public int getWideNoErr(ApwtclObj obj_ptr, ArrayList<Long> wide_ptr) {
    if ((obj_ptr.obj_type != OBJ_TYPE_INT) && (setFromAny(obj_ptr, FUNCTION_FLAGS_NONE) == ERROR)) {
      return ERROR;
    }
    wide_ptr.add(obj_ptr.wideValue_GetValue());
    return OK;
  }

  /* ==================== isWide ================================== */
::itcl::body IntObjType::  public boolean isWide(ApwtclObj obj_ptr) {
    return obj_ptr.obj_type == OBJ_TYPE_INT;
  }
}

  # ==================== getBool ==================================
::itcl::body IntObjType::getBool {obj_ptr bool_ptr} {
    ArrayList<Long> wide_value = new ArrayList<Long>();
    ArrayList<Double> double_value = new ArrayList<Double>();
    
    if (getWideNoErr(obj_ptr, wide_value) != OK) {
      if (getDouble(obj_ptr, double_value) != OK) {
        return ERROR;
      } else {
        bool_ptr.add(double_value.get(0) != 0);
	return OK;
      }
    }
    bool_ptr.add(wide_value.get(0) != 0);
    return OK;
  }

if {0} {
  /* ==================== checkConversion ================================== */
  /*
   * After an strtol()/strtod()-like conversion,
   * check whether something was converted and that
   * the only thing left is white space.
   *
   * Returns int_obj.OK or int_obj.ERROR.
   */
::itcl::body IntObjType::  public int checkConversion(long val, long result_val) {
    // FIXME!! need check code here
    if (val != result_val) {
      return ERROR;
    }
    return OK;
  }

  /* ==================== getLong ================================== */
::itcl::body IntObjType::  public int getLong(ApwtclObj obj_ptr, ArrayList<Long> long_ptr) {
    ArrayList<Long> wide_value = new ArrayList<Long>();
    int retval;

    retval = getWide(obj_ptr, wide_value);
    if (retval == OK) {
       long_ptr.add(wide_value.get(0));
       return OK;
    }
    return ERROR;
  }

  /* ==================== setDoubleFromAny ================================== */
::itcl::body IntObjType::  public int setDoubleFromAny(ApwtclObj obj_ptr) {
    ArrayList<Double> double_value = new ArrayList<Double>();
    ArrayList<Long> wide_value = new ArrayList<Long>();
    String str;

    /* Preserve the string representation.
     * Needed so we can convert back to int without loss
     */
    str = obj_ptr.getString();

    long MIN_INT_IN_DOUBLE = -(1 << 53);
    long MAX_INT_IN_DOUBLE = -(MIN_INT_IN_DOUBLE + 1);

    if (obj_ptr.obj_type == OBJ_TYPE_INT
        && obj_ptr.wideValue_GetValue() >= MIN_INT_IN_DOUBLE
        && obj_ptr.wideValue_GetValue() <= MAX_INT_IN_DOUBLE) {
      /* Direct conversion to coerced double */
      obj_ptr.obj_type = OBJ_TYPE_COERCED_DOUBLE;
      return OK;
    } else {
      if (interp.string_obj_type.stringToWide(str, wide_value) == OK) {
        /* Managed to convert to an int, so we can use this as a cooerced double */
        obj_ptr.freeIntRep();
        obj_ptr.obj_type = OBJ_TYPE_COERCED_DOUBLE;
        obj_ptr.wideValue_SetValue(wide_value.get(0));
        return OK;
      } else {
        /* Try to convert into a double */
        if (interp.string_obj_type.stringToDouble(str, double_value) != OK) {
          interp.setResultFormatted("expected number but got \"%#s\"", obj_ptr);
          return ERROR;
        }
        /* Free the old internal repr and set the new one. */
        obj_ptr.freeIntRep();
      }
    }
    obj_ptr.obj_type = OBJ_TYPE_DOUBLE;
    obj_ptr.doubleValue_SetValue(double_value.get(0));
    return OK;
  }

  /* ==================== getDouble ================================== */
::itcl::body IntObjType::  public int getDouble(ApwtclObj obj_ptr, ArrayList<Double> double_ptr) {
    if (obj_ptr.obj_type == OBJ_TYPE_COERCED_DOUBLE) {
      double_ptr.add((double)obj_ptr.wideValue_GetValue());
      return OK;
    }
    if ((obj_ptr.obj_type != OBJ_TYPE_DOUBLE) && (setDoubleFromAny(obj_ptr) == ERROR)) { 
      return ERROR;
    }
    if (obj_ptr.obj_type == OBJ_TYPE_COERCED_DOUBLE) {
      double_ptr.add((double)obj_ptr.wideValue_GetValue());
    } else {
      double_ptr.add(obj_ptr.doubleValue_GetValue());
    }
    return OK;
  }

  /* ==================== newDouble ================================== */
::itcl::body IntObjType::  public ApwtclObj newDouble(double double_value) {
    ApwtclObj obj_ptr;

    obj_ptr = interp.default_obj.newObj();
    obj_ptr.obj_type = OBJ_TYPE_DOUBLE;
    obj_ptr.bytes = null;
    obj_ptr.doubleValue_SetValue(double_value);
    return obj_ptr;
  }
}

}