core/sql/common/ComSqlText.cpp

/* -*-C++-*-
// @@@ START COPYRIGHT @@@
//
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
//
// @@@ END COPYRIGHT @@@
 *****************************************************************************
 *
 * File:         ComSqlText.C
 * Description:  methods for class ComSqlTextHandle and the definition
 *               of instance ComSqlText at file scope level
 *
 * Created:      7/31/95
 * Language:     C++
 *
 *
 *
 *****************************************************************************
 */

#include <ctype.h>
#include <new>
#include "ComSqlText.h"

// -----------------------------------------------------------------------
// file scope definition of ComSqlText
// -----------------------------------------------------------------------

ComSqlTextHandle ComSqlText;

#if 0 /* Not needed since ComSqlTextHandle object has no data members */
UInt32 ComSqlTextHandleInitializer::count_ = 0;

// -----------------------------------------------------------------------
// methods for class ComSqlTextHandleInitializer
// -----------------------------------------------------------------------

ComSqlTextHandleInitializer::ComSqlTextHandleInitializer()
{
  if (count_++)
  {
    return;     // init already done
  }

  new(&ComSqlText) ComSqlTextHandle();
}
#endif

// -----------------------------------------------------------------------
// methods for class ComSqlTextHandle
// -----------------------------------------------------------------------

NABoolean
ComSqlTextHandle::isDigit(const char &aChar) const
{
  if (isdigit(aChar))
  {
    return TRUE;
  }
  return FALSE;
}

NABoolean
ComSqlTextHandle::isDoubleQuote(const char &aChar) const
{
  if (aChar EQU getDoubleQuote())
  {
    return TRUE;
  }
  return FALSE;
}

//
// <nondoublequote character> is defined on page 69 of X3H2-93-004
//   For now, this method only supports any <SQL language character>
//   other than a <double quote>
//
NABoolean
ComSqlTextHandle::isNonDoubleQuoteChar(const char &aChar) const
{
  if (isDoubleQuote(aChar))
  {
    return FALSE;
  }
  if (isSqlLangChar(aChar))
  {
    return TRUE;
  }
  return FALSE;
}

NABoolean
ComSqlTextHandle::isIdentifierPart(const char &aChar) const
{
  if (isIdentifierStart(aChar) OR isDigit(aChar))
  {
    return TRUE;
  }
  return FALSE;
}

NABoolean
ComSqlTextHandle::isIdentifierPartOrUnderscore(const char &aChar) const
{
  if (isIdentifierPart(aChar) OR isUnderscore(aChar))
  {
    return TRUE;
  }
  return FALSE;
}

//
// <identifier start> is defined on page 68 of X3H2-93-004
//   For now, this method only supports a <simple Latin letter>
//
NABoolean
ComSqlTextHandle::isIdentifierStart(const char &aChar) const
{
  if (isSimpleLatinLetter(aChar))
  {
    return TRUE;
  }
  return FALSE;
}

NABoolean
ComSqlTextHandle::isPeriod(const char &aChar) const
{
  if (aChar EQU getPeriod())
  {
    return TRUE;
  }
  return FALSE;
}

NABoolean
ComSqlTextHandle::isSpace(const char &aChar) const
{
  if (aChar EQU getSpace())
  {
    return TRUE;
  }
  return FALSE;
}

NABoolean
ComSqlTextHandle::isSimpleLatinLetter(const char &aChar) const
{
  if (isalpha(aChar))
  {
    return TRUE;
  }
  return FALSE;
}

NABoolean
ComSqlTextHandle::isSimpleLatinLowerCaseLetter(const char &aChar) const
{
  if (isalpha(aChar) AND islower(aChar))
  {
    return TRUE;
  }
  return FALSE;
}

NABoolean
ComSqlTextHandle::isSimpleLatinUpperCaseLetter(const char &aChar) const
{
  if (isalpha(aChar) AND isupper(aChar))
  {
    return TRUE;
  }
  return FALSE;
}

NABoolean
ComSqlTextHandle::isSqlLangChar(const char &aChar) const
{
  if (isSimpleLatinLetter(aChar) OR
      isDigit(aChar) OR
      isSqlSpecialChar(aChar))
  {
    return TRUE;
  }
  return FALSE;
}

NABoolean
ComSqlTextHandle::isSqlSpecialChar(const char &aChar) const
{
  if (isSpace(aChar))
  {
    return TRUE;
  }
  switch(aChar)
  {
  case '"' :    // double quote
  case '%' :    // percent
  case '&' :    // ampersand
  case '\'':    // quote
  case '(' :    // left parenthesis
  case ')' :    // right parenthesis
  case '*' :    // asterisk
  case '+' :    // plus sign
  case ',' :    // comma
  case '-' :    // minus sign
  case '.' :    // period
  case '/' :    // solidus
  case ':' :    // colon
  case ';' :    // semicolon
  case '<' :    // less than operator
  case '=' :    // equals operator
  case '>' :    // greater than operator
  case '?' :    // question mark
  case '[' :    // left bracket
  case ']' :    // right bracket
  case '_' :    // underscore
  case '|' :    // vertical bar

    return TRUE;

  default :
    return FALSE;

  } // switch
}

NABoolean
ComSqlTextHandle::isUnderscore(const char &aChar) const
{
  if (aChar EQU getUnderscore())
  {
    return TRUE;
  }
  return FALSE;
}

//
// End of File
//