OW_WQLScanUtils.cpp

Go to the documentation of this file.

/*******************************************************************************
* Copyright (C) 2001-2004 Vintela, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
*  - Redistributions of source code must retain the above copyright notice,
*    this list of conditions and the following disclaimer.
*
*  - Redistributions in binary form must reproduce the above copyright notice,
*    this list of conditions and the following disclaimer in the documentation
*    and/or other materials provided with the distribution.
*
*  - Neither the name of Vintela, Inc. nor the names of its
*    contributors may be used to endorse or promote products derived from this
*    software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL Vintela, Inc. OR THE CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************/

/*-------------------------------------------------------------------------
 *
 * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 *-------------------------------------------------------------------------
 */
#include "OW_WQLScanUtils.hpp"
#include "OW_String.hpp"
#include "OW_StringBuffer.hpp"

namespace OW_NAMESPACE
{

String
WQLRemoveStringEscapes(const String& s)
{
   if (s.empty())
   {
      return s;
   }
   StringBuffer newStr(s.length());
   int len = s.length();
   for (int i = 0; i < len; i++)
   {
      if (s[i] == '\'')
      {
         /*
          * Note: if scanner is working right, unescaped quotes can
          * only appear in pairs, so there should be another character.
          */
         i++;
         newStr += s[i];
      }
      else if (s[i] == '\\')
      {
         i++;
         switch (s[i])
         {
            case 'b':
               newStr += '\b';
               break;
            case 'f':
               newStr += '\f';
               break;
            case 'n':
               newStr += '\n';
               break;
            case 'r':
               newStr += '\r';
               break;
            case 't':
               newStr += '\t';
               break;
            case '0':
            case '1':
            case '2':
            case '3':
            case '4':
            case '5':
            case '6':
            case '7':
               {
                  int         k;
                  long     octVal = 0;
                  for (k = 0;
                      s[i + k] >= '0' && s[i + k] <= '7' && k < 3;
                      k++)
                     octVal = (octVal << 3) + (s[i + k] - '0');
                  i += k - 1;
                  newStr += (static_cast<char>(octVal));
               }
               break;
            default:
               newStr += s[i];
               break;
         }              /* switch */
      }                 /* s[i] == '\\' */
      else
         newStr += s[i];
   }
   return newStr.releaseString();
}

} // end namespace OW_NAMESPACE

---