s57classregistrar.cpp

GIS系统支持库Geospatial Data Abstraction Library代码.GDAL is a translator library for raster geospatial dat

/******************************************************************************
 * $Id: s57classregistrar.cpp,v 1.9 2004/08/30 20:11:14 warmerda Exp $
 *
 * Project:  S-57 Translator
 * Purpose:  Implements S57ClassRegistrar class for keeping track of
 *           information on S57 object classes.
 * Author:   Frank Warmerdam, [e-mail]
 *
 ******************************************************************************
 * Copyright (c) 1999, Frank Warmerdam
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 ******************************************************************************
 *
 * $Log: s57classregistrar.cpp,v $
 * Revision 1.9  2004/08/30 20:11:14  warmerda
 * various optimizations made
 *
 * Revision 1.8  2003/09/12 21:18:54  warmerda
 * open csv files in binary mode, not text mode
 *
 * Revision 1.7  2001/12/17 22:38:42  warmerda
 * restructure LoadInfo() to support in-code tables
 *
 * Revision 1.6  2001/07/18 04:55:16  warmerda
 * added CPL_CSVID
 *
 * Revision 1.5  2000/12/21 21:58:10  warmerda
 * Append class numbers to list rather than inserting at beginning, to
 * preserve original order.
 *
 * Revision 1.4  2000/08/30 09:14:08  warmerda
 * added use of CPLFindFile
 *
 * Revision 1.3  2000/06/07 20:50:58  warmerda
 * make CSV location configurable with env variable
 *
 * Revision 1.2  1999/11/18 19:01:25  warmerda
 * expanded tabs
 *
 * Revision 1.1  1999/11/08 22:22:55  warmerda
 * New
 *
 */

#include "s57.h"
#include "cpl_conv.h"
#include "cpl_string.h"

CPL_CVSID("$Id: s57classregistrar.cpp,v 1.9 2004/08/30 20:11:14 warmerda Exp $");


#ifdef S57_BUILTIN_CLASSES
#include "s57tables.h"
#endif

/************************************************************************/
/*                         S57ClassRegistrar()                          */
/************************************************************************/

S57ClassRegistrar::S57ClassRegistrar()

{
    nClasses = 0;
    papszClassesInfo = NULL;
    
    iCurrentClass = -1;

    papszCurrentFields = NULL;
    papszTempResult = NULL;
    papszNextLine = NULL;
    papapszClassesFields = NULL;
}

/************************************************************************/
/*                         ~S57ClassRegistrar()                         */
/************************************************************************/

S57ClassRegistrar::~S57ClassRegistrar()

{
    CSLDestroy( papszClassesInfo );
    CSLDestroy( papszTempResult );
    
    if( papapszClassesFields != NULL )
    {
        for( int i = 0; i < nClasses; i++ )
            CSLDestroy( papapszClassesFields[i] );
        CPLFree( papapszClassesFields );
    }
}

/************************************************************************/
/*                              FindFile()                              */
/************************************************************************/

int S57ClassRegistrar::FindFile( const char *pszTarget, 
                                 const char *pszDirectory, 
                                 int bReportErr,
                                 FILE **pfp )

{
    const char *pszFilename;
    
    if( pszDirectory == NULL )
    {
        pszFilename = CPLFindFile( "s57", pszTarget );
        if( pszFilename == NULL )
            pszFilename = pszTarget;
    }
    else
    {
        pszFilename = CPLFormFilename( pszDirectory, pszTarget, NULL );
    }

    *pfp = VSIFOpen( pszFilename, "rb" );

#ifdef S57_BUILTIN_CLASSES
    if( *pfp == NULL )
    {
        if( EQUAL(pszTarget, "s57objectclasses.csv") )
            papszNextLine = gpapszS57Classes;
        else
            papszNextLine = gpapszS57attributes;
    }
#else
    if( *pfp == NULL )
    {
        if( bReportErr )
            CPLError( CE_Failure, CPLE_OpenFailed,
                      "Failed to open %s.\n",
                      pszFilename );
        return FALSE;
    }
#endif

    return TRUE;
}

/************************************************************************/
/*                              ReadLine()                              */
/*                                                                      */
/*      Read a line from the provided file, or from the "built-in"      */
/*      configuration file line list if the file is NULL.               */
/************************************************************************/

const char *S57ClassRegistrar::ReadLine( FILE * fp )

{
    if( fp != NULL )
        return CPLReadLine( fp );

    if( papszNextLine == NULL )
        return NULL;

    if( *papszNextLine == NULL )
    {
        papszNextLine = NULL;
        return NULL;
    }
    else
        return *(papszNextLine++);
}

/************************************************************************/
/*                              LoadInfo()                              */
/************************************************************************/

int S57ClassRegistrar::LoadInfo( const char * pszDirectory, 
                                 int bReportErr )

{
    FILE        *fp;

    if( pszDirectory == NULL && getenv( "S57_CSV" ) != NULL )
        pszDirectory = getenv( "S57_CSV" );

/* ==================================================================== */
/*      Read the s57objectclasses file.                                 */
/* ==================================================================== */
    if( !FindFile( "s57objectclasses.csv", pszDirectory, bReportErr, &fp ) )
        return FALSE;

/* -------------------------------------------------------------------- */
/*      Skip the line defining the column titles.                       */
/* -------------------------------------------------------------------- */
    const char * pszLine = ReadLine( fp );

    if( !EQUAL(pszLine,
               "\"Code\",\"ObjectClass\",\"Acronym\",\"Attribute_A\","
               "\"Attribute_B\",\"Attribute_C\",\"Class\",\"Primitives\"" ) )
    {
        CPLError( CE_Failure, CPLE_AppDefined,
                  "s57objectclasses columns don't match expected format!\n" );
        return FALSE;
    }

/* -------------------------------------------------------------------- */
/*      Read and form string list.                                      */
/* -------------------------------------------------------------------- */
    
    CSLDestroy( papszClassesInfo );
    papszClassesInfo = (char **) CPLCalloc(sizeof(char *),MAX_CLASSES);

    nClasses = 0;

    while( nClasses < MAX_CLASSES
           && (pszLine = ReadLine(fp)) != NULL )
    {
        papszClassesInfo[nClasses] = CPLStrdup(pszLine);
        if( papszClassesInfo[nClasses] == NULL )
            break;

        nClasses++;
    }

    if( nClasses == MAX_CLASSES )
        CPLError( CE_Warning, CPLE_AppDefined,
                  "MAX_CLASSES exceeded in S57ClassRegistrar::LoadInfo().\n" );

/* -------------------------------------------------------------------- */
/*      Cleanup, and establish state.                                   */
/* -------------------------------------------------------------------- */
    if( fp != NULL )
        VSIFClose( fp );
    iCurrentClass = -1;

    if( nClasses == 0 )
        return FALSE;

/* ==================================================================== */
/*      Read the attributes list.                                       */
/* ==================================================================== */
    if( !FindFile( "s57attributes.csv", pszDirectory, bReportErr, &fp ) )
        return FALSE;

/* -------------------------------------------------------------------- */
/*      Skip the line defining the column titles.                       */
/* -------------------------------------------------------------------- */
    pszLine = ReadLine( fp );

    if( !EQUAL(pszLine,
          "\"Code\",\"Attribute\",\"Acronym\",\"Attributetype\",\"Class\"") )
    {
        CPLError( CE_Failure, CPLE_AppDefined,
                  "s57attributes columns don't match expected format!\n" );
        return FALSE;
    }
    
/* -------------------------------------------------------------------- */
/*      Prepare arrays for the per-attribute information.               */
/* -------------------------------------------------------------------- */
    nAttrMax = MAX_ATTRIBUTES-1;
    papszAttrNames = (char **) CPLCalloc(sizeof(char *),nAttrMax);
    papszAttrAcronym = (char **) CPLCalloc(sizeof(char *),nAttrMax);
    papapszAttrValues = (char ***) CPLCalloc(sizeof(char **),nAttrMax);
    pachAttrType = (char *) CPLCalloc(sizeof(char),nAttrMax);
    pachAttrClass = (char *) CPLCalloc(sizeof(char),nAttrMax);
    panAttrIndex = (int *) CPLCalloc(sizeof(int),nAttrMax);
    
/* -------------------------------------------------------------------- */
/*      Read and form string list.                                      */
/* -------------------------------------------------------------------- */
    int         iAttr;
    
    while( (pszLine = ReadLine(fp)) != NULL )
    {
        char    **papszTokens = CSLTokenizeStringComplex( pszLine, ",",
                                                          TRUE, TRUE );

        if( CSLCount(papszTokens) < 5 )