1                 : /******************************************************************************
       2                 :  * $Id: sdtsxref.cpp 10645 2007-01-18 02:22:39Z warmerdam $
       3                 :  *
       4                 :  * Project:  SDTS Translator
       5                 :  * Purpose:  Implementation of SDTS_XREF class for reading XREF module.
       6                 :  * Author:   Frank Warmerdam, warmerdam@pobox.com
       7                 :  *
       8                 :  ******************************************************************************
       9                 :  * Copyright (c) 1999, Frank Warmerdam
      10                 :  *
      11                 :  * Permission is hereby granted, free of charge, to any person obtaining a
      12                 :  * copy of this software and associated documentation files (the "Software"),
      13                 :  * to deal in the Software without restriction, including without limitation
      14                 :  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      15                 :  * and/or sell copies of the Software, and to permit persons to whom the
      16                 :  * Software is furnished to do so, subject to the following conditions:
      17                 :  *
      18                 :  * The above copyright notice and this permission notice shall be included
      19                 :  * in all copies or substantial portions of the Software.
      20                 :  *
      21                 :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
      22                 :  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      23                 :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
      24                 :  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      25                 :  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
      26                 :  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
      27                 :  * DEALINGS IN THE SOFTWARE.
      28                 :  ****************************************************************************/
      29                 : 
      30                 : #include "sdts_al.h"
      31                 : 
      32                 : CPL_CVSID("$Id: sdtsxref.cpp 10645 2007-01-18 02:22:39Z warmerdam $");
      33                 : 
      34                 : /************************************************************************/
      35                 : /*                             SDTS_XREF()                              */
      36                 : /************************************************************************/
      37                 : 
      38              19 : SDTS_XREF::SDTS_XREF()
      39                 : 
      40                 : {
      41              19 :     pszSystemName = CPLStrdup( "" );
      42              19 :     pszDatum = CPLStrdup( "" );
      43              19 :     nZone = 0;
      44              19 : }
      45                 : 
      46                 : /************************************************************************/
      47                 : /*                             ~SDTS_XREF()                             */
      48                 : /************************************************************************/
      49                 : 
      50              19 : SDTS_XREF::~SDTS_XREF()
      51                 : {
      52              19 :     CPLFree( pszSystemName );
      53              19 :     CPLFree( pszDatum );
      54              19 : }
      55                 : 
      56                 : /************************************************************************/
      57                 : /*                                Read()                                */
      58                 : /*                                                                      */
      59                 : /*      Read the named file to initialize this structure.               */
      60                 : /************************************************************************/
      61                 : 
      62               3 : int SDTS_XREF::Read( const char * pszFilename )
      63                 : 
      64                 : {
      65               3 :     DDFModule   oXREFFile;
      66                 :     DDFRecord   *poRecord;
      67                 : 
      68                 : /* -------------------------------------------------------------------- */
      69                 : /*      Open the file, and read the header.                             */
      70                 : /* -------------------------------------------------------------------- */
      71               3 :     if( !oXREFFile.Open( pszFilename ) )
      72               0 :         return FALSE;
      73                 :     
      74                 : /* -------------------------------------------------------------------- */
      75                 : /*      Read the first record, and verify that this is an XREF record.  */
      76                 : /* -------------------------------------------------------------------- */
      77               3 :     poRecord = oXREFFile.ReadRecord();
      78               3 :     if( poRecord == NULL )
      79               0 :         return FALSE;
      80                 : 
      81               3 :     if( poRecord->GetStringSubfield( "XREF", 0, "MODN", 0 ) == NULL )
      82               0 :         return FALSE;
      83                 : 
      84                 : /* -------------------------------------------------------------------- */
      85                 : /*      Read fields of interest.                                        */
      86                 : /* -------------------------------------------------------------------- */
      87                 : 
      88               3 :     CPLFree( pszSystemName );
      89                 :     pszSystemName = 
      90               3 :         CPLStrdup( poRecord->GetStringSubfield( "XREF", 0, "RSNM", 0 ) );
      91                 : 
      92               3 :     CPLFree( pszDatum );
      93                 :     pszDatum = 
      94               3 :         CPLStrdup( poRecord->GetStringSubfield( "XREF", 0, "HDAT", 0 ) );
      95                 : 
      96               3 :     nZone = poRecord->GetIntSubfield( "XREF", 0, "ZONE", 0 );
      97                 : 
      98               3 :     return TRUE;
      99                 : }