1                 : /******************************************************************************
       2                 :  * $Id: commonutils.cpp 24950 2012-09-22 13:54:36Z rouault $
       3                 :  *
       4                 :  * Project:  GDAL Utilities
       5                 :  * Purpose:  Common utility routines
       6                 :  * Author:   Even Rouault, <even dot rouault at mines dash paris dot org>
       7                 :  *
       8                 :  ******************************************************************************
       9                 :  * Copyright (c) 2011, Even Rouault
      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 "commonutils.h"
      31                 : #include "cpl_string.h"
      32                 : #include "gdal.h"
      33                 : 
      34                 : CPL_CVSID("$Id: commonutils.cpp 24950 2012-09-22 13:54:36Z rouault $");
      35                 : 
      36                 : /* -------------------------------------------------------------------- */
      37                 : /*                      CheckExtensionConsistency()                     */
      38                 : /*                                                                      */
      39                 : /*      Check that the target file extension is consistant with the     */
      40                 : /*      requested driver. Actually, we only warn in cases where the     */
      41                 : /*      inconsistency is blatant (use of an extension declared by one   */
      42                 : /*      or several drivers, and not by the selected one)                */
      43                 : /* -------------------------------------------------------------------- */
      44                 : 
      45             355 : void CheckExtensionConsistency(const char* pszDestFilename,
      46                 :                                const char* pszDriverName)
      47                 : {
      48                 : 
      49             355 :     char* pszDestExtension = CPLStrdup(CPLGetExtension(pszDestFilename));
      50             355 :     if (pszDestExtension[0] != '\0')
      51                 :     {
      52             355 :         int nDriverCount = GDALGetDriverCount();
      53             355 :         CPLString osConflictingDriverList;
      54             837 :         for(int i=0;i<nDriverCount;i++)
      55                 :         {
      56             836 :             GDALDriverH hDriver = GDALGetDriver(i);
      57                 :             const char* pszDriverExtension = 
      58             836 :                 GDALGetMetadataItem( hDriver, GDAL_DMD_EXTENSION, NULL );   
      59             836 :             if (pszDriverExtension && EQUAL(pszDestExtension, pszDriverExtension))
      60                 :             {
      61             354 :                 if (GDALGetDriverByName(pszDriverName) != hDriver)
      62                 :                 {
      63               0 :                     if (osConflictingDriverList.size())
      64               0 :                         osConflictingDriverList += ", ";
      65               0 :                     osConflictingDriverList += GDALGetDriverShortName(hDriver);
      66                 :                 }
      67                 :                 else
      68                 :                 {
      69                 :                     /* If the request driver allows the used extension, then */
      70                 :                     /* just stop iterating now */
      71             354 :                     osConflictingDriverList = "";
      72             354 :                     break;
      73                 :                 }
      74                 :             }
      75                 :         }
      76             355 :         if (osConflictingDriverList.size())
      77                 :         {
      78                 :             fprintf(stderr,
      79                 :                     "Warning: The target file has a '%s' extension, which is normally used by the %s driver%s,\n"
      80                 :                     "but the requested output driver is %s. Is it really what you want ?\n",
      81                 :                     pszDestExtension,
      82                 :                     osConflictingDriverList.c_str(),
      83                 :                     strchr(osConflictingDriverList.c_str(), ',') ? "s" : "",
      84               0 :                     pszDriverName);
      85             355 :         }
      86                 :     }
      87                 : 
      88             355 :     CPLFree(pszDestExtension);
      89             355 : }