ogrutils.cpp

mitab,读取MapInfo的地图文件

            if( *ppadfZ != NULL )
            {
                *ppadfZ = (double *)
                    CPLRealloc(*ppadfZ, sizeof(double) * *pnMaxPoints);
            }
        }

/* -------------------------------------------------------------------- */
/*      Add point to list.                                              */
/* -------------------------------------------------------------------- */
        (*ppaoPoints)[*pnPointsRead].x = atof(szTokenX);
        (*ppaoPoints)[*pnPointsRead].y = atof(szTokenY);

/* -------------------------------------------------------------------- */
/*      Do we have a Z coordinate?                                      */
/* -------------------------------------------------------------------- */
        pszInput = OGRWktReadToken( pszInput, szDelim );

        if( isdigit(szDelim[0]) || szDelim[0] == '-' || szDelim[0] == '.' )
        {
            if( *ppadfZ == NULL )
            {
                *ppadfZ = (double *) CPLCalloc(sizeof(double),*pnMaxPoints);
            }

            (*ppadfZ)[*pnPointsRead] = atof(szDelim);
            
            pszInput = OGRWktReadToken( pszInput, szDelim );
        }
        
        (*pnPointsRead)++;

/* -------------------------------------------------------------------- */
/*      Do we have a M coordinate?                                      */
/*      If we do, just skip it.                                         */
/* -------------------------------------------------------------------- */
        if( isdigit(szDelim[0]) || szDelim[0] == '-' || szDelim[0] == '.' )
        {
            pszInput = OGRWktReadToken( pszInput, szDelim );
        }
        
/* -------------------------------------------------------------------- */
/*      Read next delimeter ... it should be a comma if there are       */
/*      more points.                                                    */
/* -------------------------------------------------------------------- */
        if( szDelim[0] != ')' && szDelim[0] != ',' )
        {
            CPLDebug( "OGR",
                      "Corrupt input in OGRWktReadPoints()\n"
                      "Got `%s' when expecting `,' or `)', near `%s' in %s.\n",
                      szDelim, pszInput, pszOrigInput );
            return NULL;
        }
        
    } while( szDelim[0] == ',' );

    return pszInput;
}

/************************************************************************/
/*                             OGRMalloc()                              */
/*                                                                      */
/*      Cover for CPLMalloc()                                           */
/************************************************************************/

void *OGRMalloc( size_t size )

{
    return CPLMalloc( size );
}

/************************************************************************/
/*                             OGRCalloc()                              */
/*                                                                      */
/*      Cover for CPLCalloc()                                           */
/************************************************************************/

void * OGRCalloc( size_t count, size_t size )

{
    return CPLCalloc( count, size );
}

/************************************************************************/
/*                             OGRRealloc()                             */
/*                                                                      */
/*      Cover for CPLRealloc()                                          */
/************************************************************************/

void *OGRRealloc( void * pOld, size_t size )

{
    return CPLRealloc( pOld, size );
}

/************************************************************************/
/*                              OGRFree()                               */
/*                                                                      */
/*      Cover for CPLFree().                                            */
/************************************************************************/

void OGRFree( void * pMemory )

{
    CPLFree( pMemory );
}

/**
 * General utility option processing.
 *
 * This function is intended to provide a variety of generic commandline 
 * options for all OGR commandline utilities.  It takes care of the following
 * commandline options:
 *  
 *  --formats: report all format drivers configured.
 *  --format [format]: report details of one format driver. 
 *  --optfile filename: expand an option file into the argument list. 
 *  --config key value: set system configuration option. 
 *  --debug [on/off/value]: set debug level.
 *  --help-general: report detailed help on general options. 
 *
 * The argument array is replaced "in place" and should be freed with 
 * CSLDestroy() when no longer needed.  The typical usage looks something
 * like the following.  Note that the formats should be registered so that
 * the --formats and --format options will work properly.
 *
 *  int main( int argc, char ** argv )
 *  { 
 *    OGRAllRegister();
 *
 *    argc = OGRGeneralCmdLineProcessor( argc, &argv, 0 );
 *    if( argc < 1 )
 *        exit( -argc );
 *
 * @param nArgc number of values in the argument list.
 * @param Pointer to the argument list array (will be updated in place). 
 *
 * @return updated nArgc argument count.  Return of 0 requests terminate 
 * without error, return of -1 requests exit with error code.
 */

int OGRGeneralCmdLineProcessor( int nArgc, char ***ppapszArgv, int nOptions )

{
    char **papszReturn = NULL;
    int  iArg;
    char **papszArgv = *ppapszArgv;

    (void) nOptions;
    
/* -------------------------------------------------------------------- */
/*      Preserve the program name.                                      */
/* -------------------------------------------------------------------- */
    papszReturn = CSLAddString( papszReturn, papszArgv[0] );

/* ==================================================================== */
/*      Loop over all arguments.                                        */
/* ==================================================================== */
    for( iArg = 1; iArg < nArgc; iArg++ )
    {

/* -------------------------------------------------------------------- */
/*      --config                                                        */
/* -------------------------------------------------------------------- */
        if( EQUAL(papszArgv[iArg],"--config") )
        {
            if( iArg + 2 >= nArgc )
            {
                CPLError( CE_Failure, CPLE_AppDefined, 
                          "--config option given without a key and value argument." );
                CSLDestroy( papszReturn );
                return -1;
            }

            CPLSetConfigOption( papszArgv[iArg+1], papszArgv[iArg+2] );

            iArg += 2;
        }

/* -------------------------------------------------------------------- */
/*      --mempreload                                                    */
/* -------------------------------------------------------------------- */
        else if( EQUAL(papszArgv[iArg],"--mempreload") )
        {
            int i;

            if( iArg + 1 >= nArgc )
            {
                CPLError( CE_Failure, CPLE_AppDefined, 
                          "--mempreload option given without directory path.");
                CSLDestroy( papszReturn );
                return -1;
            }
            
            char **papszFiles = CPLReadDir( papszArgv[iArg+1] );
            if( CSLCount(papszFiles) == 0 )
            {
                CPLError( CE_Failure, CPLE_AppDefined, 
                          "--mempreload given invalid or empty directory.");
                CSLDestroy( papszReturn );
                return -1;
            }
                
            for( i = 0; papszFiles[i] != NULL; i++ )
            {
                CPLString osOldPath, osNewPath;
                
                if( EQUAL(papszFiles[i],".") || EQUAL(papszFiles[i],"..") )
                    continue;

                osOldPath = CPLFormFilename( papszArgv[iArg+1], 
                                             papszFiles[i], NULL );
                osNewPath.Printf( "/vsimem/%s", papszFiles[i] );

                CPLDebug( "VSI", "Preloading %s to %s.", 
                          osOldPath.c_str(), osNewPath.c_str() );

                if( CPLCopyFile( osNewPath, osOldPath ) != 0 )
                    return -1;
            }
            
            CSLDestroy( papszFiles );
            iArg += 1;
        }

/* -------------------------------------------------------------------- */
/*      --debug                                                         */
/* -------------------------------------------------------------------- */
        else if( EQUAL(papszArgv[iArg],"--debug") )
        {
            if( iArg + 1 >= nArgc )
            {
                CPLError( CE_Failure, CPLE_AppDefined, 
                          "--debug option given without debug level." );
                CSLDestroy( papszReturn );
                return -1;
            }

            CPLSetConfigOption( "CPL_DEBUG", papszArgv[iArg+1] );
            iArg += 1;
        }

/* -------------------------------------------------------------------- */
/*      --optfile                                                       */
/*                                                                      */
/*      Annoyingly the options inserted by --optfile will *not* be      */
/*      processed properly if they are general options.                 */
/* -------------------------------------------------------------------- */
        else if( EQUAL(papszArgv[iArg],"--optfile") )
        {
            const char *pszLine;
            FILE *fpOptFile;

            if( iArg + 1 >= nArgc )
            {
                CPLError( CE_Failure, CPLE_AppDefined, 
                          "--optfile option given without filename." );
                CSLDestroy( papszReturn );
                return -1;
            }

            fpOptFile = VSIFOpen( papszArgv[iArg+1], "rb" );

            if( fpOptFile == NULL )
            {
                CPLError( CE_Failure, CPLE_AppDefined, 
                          "Unable to open optfile '%s'.\n%s",