common.h

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#ifndef DB_FREETDS_COMMON_SUPPORT
#define DB_FREETDS_COMMON_SUPPORT

/*****************************************************************************\
*                                                                             *
*  Name   : common support for db apps.                                       *
*  Author : Chris Koeritz                                                     *
*  Author : freetds team for some tidbits                                     *
*                                                                             *
*******************************************************************************
* Copyright (c) 2008-$now By Author.  This program is free software; you can  *
* redistribute it and/or modify it under the terms of the GNU General Public  *
* License as published by the Free Software Foundation; either version 2 of   *
* the License or (at your option) any later version.  This is online at:      *
*     http://www.fsf.org/copyleft/gpl.html                                    *
* Please send any updates to: fred@gruntose.com                               *
\*****************************************************************************/

#include "db_freetds_dll.h"

#if HAVE_CONFIG_H
  #include <config.h>
#endif /* HAVE_CONFIG_H */

#include <stdarg.h>
#include <stdio.h>

#if HAVE_STDLIB_H
  #include <stdlib.h>
#endif /* HAVE_STDLIB_H */

#if HAVE_STRING_H
  #include <string.h>
#endif /* HAVE_STRING_H */

#ifdef DBNTWIN32
  #include <windows.h>
#endif

#include <sqlfront.h>
#include <sqldb.h>

// forward.
class istring;

#ifdef DBNTWIN32
  /*
   * Define Sybase's symbols in terms of Microsoft's. 
   * This allows these tests to be run using Microsoft's include
   * files and library (libsybdb.lib).
   */
  #define MSDBLIB 1
  #define MICROSOFT_DBLIB 1
  #define dbloginfree(l) dbfreelogin(l)

  #define SYBESMSG    SQLESMSG
  #define SYBECOFL    SQLECOFL

  #define SYBAOPSUM   SQLAOPSUM
  #define SYBAOPMAX   SQLAOPMAX

  #define SYBINT4     SQLINT4
  #define SYBDATETIME SQLDATETIME
  #define SYBCHAR     SQLCHAR
  #define SYBVARCHAR  SQLVARCHAR
  #define SYBTEXT     SQLTEXT
  #define SYBBINARY   SQLBINARY
  #define SYBIMAGE    SQLIMAGE

  #define dberrhandle(h) dberrhandle((DBERRHANDLE_PROC) h)
  #define dbmsghandle(h) dbmsghandle((DBMSGHANDLE_PROC) h)
#endif


const char DB_FREETDS_SQL_ESCAPE_CHARACTER = '\\';
  // we use a backslash to escape special characters in queries.

class DB_FREETDS_CLASS_STYLE common_database_support
{
public:
  static bool _error_was_seen;


  static int syb_msg_handler(DBPROCESS *dbproc, DBINT msgno,
     int msgstate, int severity, char *msgtext, char *srvname, char *procname,
     int line);
  // error handler that we hook into the db mechanism to catch failures.
  static int syb_err_handler(DBPROCESS *dbproc, int severity, int dberr,
     int oserr, char *dberrstr, char *oserrstr);


  static void nerf_special_characters(istring &to_nerf, char escape_char);

};

#endif  // outer guard.

---