ogrutils.cpp

用于读取TAB、MIF、SHP文件的类

        }

/* -------------------------------------------------------------------- */
/*      --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",
                          papszArgv[iArg+1], VSIStrerror( errno ) );
                CSLDestroy( papszReturn );
                return -1;
            }
            
            while( (pszLine = CPLReadLine( fpOptFile )) != NULL )
            {
                char **papszTokens;
                int i;

                if( pszLine[0] == '#' || strlen(pszLine) == 0 )
                    continue;

                papszTokens = CSLTokenizeString( pszLine );
                for( i = 0; papszTokens != NULL && papszTokens[i] != NULL; i++)
                    papszReturn = CSLAddString( papszReturn, papszTokens[i] );
                CSLDestroy( papszTokens );
            }

            VSIFClose( fpOptFile );
                
            iArg += 1;
        }

/* -------------------------------------------------------------------- */
/*      --formats                                                       */
/* -------------------------------------------------------------------- */
#ifdef OGR_ENABLED
        else if( EQUAL(papszArgv[iArg], "--formats") )
        {
            int iDr;

            printf( "Supported Formats:\n" );

            OGRSFDriverRegistrar *poR = OGRSFDriverRegistrar::GetRegistrar();
        
            for( iDr = 0; iDr < poR->GetDriverCount(); iDr++ )
            {
                OGRSFDriver *poDriver = poR->GetDriver(iDr);

                if( poDriver->TestCapability( ODrCCreateDataSource ) )
                    printf( "  -> \"%s\" (read/write)\n", 
                            poDriver->GetName() );
                else
                    printf( "  -> \"%s\" (readonly)\n", 
                            poDriver->GetName() );
            }

            CSLDestroy( papszReturn );
            return 0;
        }
#endif /* OGR_ENABLED */

/* -------------------------------------------------------------------- */
/*      --help-general                                                  */
/* -------------------------------------------------------------------- */
        else if( EQUAL(papszArgv[iArg],"--help-general") )
        {
            printf( "Generic GDAL utility command options:\n" );
#ifdef OGR_ENABLED
            printf( "  --formats: report all configured format drivers.\n" );
#endif /* OGR_ENABLED */
            printf( "  --optfile filename: expand an option file into the argument list.\n" );
            printf( "  --config key value: set system configuration option.\n" );
            printf( "  --debug [on/off/value]: set debug level.\n" );
            printf( "  --help-general: report detailed help on general options.\n" );
            CSLDestroy( papszReturn );
            return 0;
        }

/* -------------------------------------------------------------------- */
/*      carry through unrecognised options.                             */
/* -------------------------------------------------------------------- */
        else
        {
            papszReturn = CSLAddString( papszReturn, papszArgv[iArg] );
        }
    }

    *ppapszArgv = papszReturn;

    return CSLCount( *ppapszArgv );
}

/************************************************************************/
/*                            OGRParseDate()                            */
/*                                                                      */
/*      Parse a variety of text date formats into an OGRField.          */
/************************************************************************/

/**
 * Parse date string.
 *
 * This function attempts to parse a date string in a variety of formats
 * into the OGRField.Date format suitable for use with OGR.  Generally 
 * speaking this function is expecting values like:
 * 
 *   YYYY-MM-DD HH:MM:SS+nn
 *
 * The seconds may also have a decimal portion (which is ignored).  And
 * just dates (YYYY-MM-DD) or just times (HH:MM:SS) are also supported. 
 * The date may also be in YYYY/MM/DD format.  If the year is less than 100
 * and greater than 30 a "1900" century value will be set.  If it is less than
 * 30 and greater than -1 then a "2000" century value will be set.  In 
 * the future this function may be generalized, and additional control 
 * provided through nOptions, but an nOptions value of "0" should always do
 * a reasonable default form of processing.
 *
 * The value of psField will be indeterminate if the function fails (returns
 * FALSE).  
 *
 * @param pszInput the input date string.
 * @param psField the OGRField that will be updated with the parsed result.
 * @param nOptions parsing options, for now always 0. 
 *
 * @return TRUE if apparently successful or FALSE on failure.
 */

int OGRParseDate( const char *pszInput, OGRField *psField, int nOptions )

{
    int bGotSomething = FALSE;

    psField->Date.Year = 0;
    psField->Date.Month = 0;
    psField->Date.Day = 0;
    psField->Date.Hour = 0;
    psField->Date.Minute = 0;
    psField->Date.Second = 0;
    psField->Date.TZFlag = 0;
    
/* -------------------------------------------------------------------- */
/*      Do we have a date?                                              */
/* -------------------------------------------------------------------- */
    while( *pszInput == ' ' )
        pszInput++;
    
    if( strstr(pszInput,"-") != NULL || strstr(pszInput,"/") != NULL )
    {
        psField->Date.Year = atoi(pszInput);
        if( psField->Date.Year < 100 && psField->Date.Year >= 30 )
            psField->Date.Year += 1900;
        else if( psField->Date.Year < 30 && psField->Date.Year >= 0 )
            psField->Date.Year += 2000;

        while( *pszInput >= '0' && *pszInput <= '9' ) 
            pszInput++;
        if( *pszInput != '-' && *pszInput != '/' )
            return FALSE;
        else 
            pszInput++;

        psField->Date.Month = atoi(pszInput);
        if( psField->Date.Month > 12 )
            return FALSE;

        while( *pszInput >= '0' && *pszInput <= '9' ) 
            pszInput++;
        if( *pszInput != '-' && *pszInput != '/' )
            return FALSE;
        else 
            pszInput++;

        psField->Date.Day = atoi(pszInput);
        if( psField->Date.Day > 31 )
            return FALSE;

        while( *pszInput >= '0' && *pszInput <= '9' )
            pszInput++;

        bGotSomething = TRUE;
    }

/* -------------------------------------------------------------------- */
/*      Do we have a time?                                              */
/* -------------------------------------------------------------------- */
    while( *pszInput == ' ' )
        pszInput++;
    
    if( strstr(pszInput,":") != NULL )
    {
        psField->Date.Hour = atoi(pszInput);
        if( psField->Date.Hour > 23 )
            return FALSE;

        while( *pszInput >= '0' && *pszInput <= '9' ) 
            pszInput++;
        if( *pszInput != ':' )
            return FALSE;
        else 
            pszInput++;

        psField->Date.Minute = atoi(pszInput);
        if( psField->Date.Minute > 59 )
            return FALSE;

        while( *pszInput >= '0' && *pszInput <= '9' ) 
            pszInput++;
        if( *pszInput != ':' )
            return FALSE;
        else 
            pszInput++;

        psField->Date.Second = atoi(pszInput);
        if( psField->Date.Second > 59 )
            return FALSE;

        while( *pszInput >= '0' && *pszInput <= '9' 
               || *pszInput == '.' )
            pszInput++;

        bGotSomething = TRUE;
    }

    // No date or time!
    if( !bGotSomething )
        return FALSE;

/* -------------------------------------------------------------------- */
/*      Do we have a timezone?                                          */
/* -------------------------------------------------------------------- */
    while( *pszInput == ' ' )
        pszInput++;
    
    if( *pszInput == '-' || *pszInput == '+' )
    {
        // +HH integral offset
        if( strlen(pszInput) <= 3 )
            psField->Date.TZFlag = 100 + atoi(pszInput) * 4;

        else if( pszInput[3] == ':'  // +HH:MM offset
                 && atoi(pszInput+4) % 15 == 0 )
        {
            psField->Date.TZFlag = 100 
                + atoi(pszInput+1) * 4
                + (atoi(pszInput+4) / 15);

            if( pszInput[0] == '-' )
                psField->Date.TZFlag = -1 * (psField->Date.TZFlag - 100) + 100;
        }
        else if( isdigit(pszInput[3]) && isdigit(pszInput[4])  // +HHMM offset
                 && atoi(pszInput+3) % 15 == 0 )
        {
            psField->Date.TZFlag = 100 
                + static_cast<GByte>(CPLScanLong(pszInput+1,2)) * 4
                + (atoi(pszInput+3) / 15);

            if( pszInput[0] == '-' )
                psField->Date.TZFlag = -1 * (psField->Date.TZFlag - 100) + 100;
        }
        else if( isdigit(pszInput[3]) && pszInput[4] == '\0'  // +HMM offset
                 && atoi(pszInput+2) % 15 == 0 )
        {
            psField->Date.TZFlag = 100 
                + static_cast<GByte>(CPLScanLong(pszInput+1,1)) * 4
                + (atoi(pszInput+2) / 15);

            if( pszInput[0] == '-' )
                psField->Date.TZFlag = -1 * (psField->Date.TZFlag - 100) + 100;
        }
        // otherwise ignore any timezone info.
    }

    return TRUE;
}