LCD_DocumentUtil.cc

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// ----------------------------------------------------------------------------
// $Id: LCD_DocumentUtil.cc,v 1.11 2004/02/02 22:12:48 uid561 Exp $
// ----------------------------------------------------------------------------
//
// LCD_DocumentUtil.cxx
//
//  Implementation file for a class of static utilities needed
//  by LCD_Doc.. family of classes

#include <sstream>
#include "LCD_DocumentUtil.hh"
XERCES_CPP_NAMESPACE_USE

const int LCD_DocumentUtil::m_MAX_STR_LEN = 256;

// static methods from LCD_DocumentUtil class

/*
 * Comment
 */
bool LCD_DocumentUtil::convertValue(const DOMString& strVal, double *val)
{
  char buf[m_MAX_STR_LEN];
  *val = 0.0;
  bool ok;

  if (!(squash(strVal, buf))) return false;

  std::istringstream ist(&buf[0]);

  ist >> *val;

  ok = !(ist.fail());
  return ok;

}


/*
 * Comment
 */
bool LCD_DocumentUtil::convertValue(const DOMString& strVal, int *val)
{
  char buf[m_MAX_STR_LEN];
  *val = 0;
  bool ok;

  if (!(squash(strVal, buf))) return false;

  std::istringstream ist(&buf[0]);

  ist >> *val;

  ok = !(ist.fail());
  return ok;

}


/*
 * Comment
 */
bool LCD_DocumentUtil::convertValue(const DOMString& strVal, unsigned int *val)
{
  char buf[m_MAX_STR_LEN];
  bool ok;

  if (!(squash(strVal, buf))) return false;

  std::istringstream ist(&buf[0]);

  ist >> *val;

  ok = !(ist.fail());
  return ok;

}

/*
 * Comment
 */
bool LCD_DocumentUtil::convertValue(const DOMString& strVal, bool *val) {
  if ((strVal.equals("yes")) || (strVal.equals("true")) ) {
    *val = true;
  }
  else if ((strVal.equals("no")) || (strVal.equals("false")) ) {
    *val = false;
  }
  else return false;          // illegal value supplied

  return true;
}

// Given a DOMString, just cut off higher byte of raw unicode string
// and copy to supplied buffer (which had better be big enough!)

/*
 * Comment
 */
bool LCD_DocumentUtil::squash(const DOMString& domstr, char *squashed,
                              int  bufLen) {
  int len = domstr.length();
  int ix;
  if (len >= bufLen) return false;

  for (ix = 0; ix < len; ix++) {
    squashed[ix] = (domstr.charAt(ix) & 0x00ff);
  }


  // Note:  following did not work since __wchar_t apparently translates
  // to long rather than short
  //  nSquashed = wcstombs(squashed, (__wchar_t *) domstr.rawBuffer(), bufLen);

  squashed[ix] = 0;

  return true;
}


/*
 * Comment
 */
DOM_Element LCD_DocumentUtil::firstDesc(const DOM_Element ancestor,
                                        const DOMString& tagName)
{
  DOM_NodeList list = ancestor.getElementsByTagName(tagName);
  if (list.getLength() == 0) return DOM_Element();
  DOM_Node node = list.item(0);

  DOM_Element retElt = (DOM_Element &) node;
  return retElt;
}

/*
 * Comment
 */
DOM_Element LCD_DocumentUtil::firstDesc(const DOM_Element ancestor,
                                        const char* tagName)
{
  DOM_NodeList list = ancestor.getElementsByTagName(DOMString(tagName));
  if (list.getLength() == 0) return DOM_Element();

  DOM_Node node = list.item(0);
  return (DOM_Element &) (node);
}

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