s57classregistrar.cpp

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

        {
            CPLAssert( FALSE );
            continue;
        }
        
        iAttr = atoi(papszTokens[0]);
        if( iAttr < 0 || iAttr >= nAttrMax
            || papszAttrNames[iAttr] != NULL )
        {
            CPLAssert( FALSE );
            continue;
        }
        
        papszAttrNames[iAttr] = CPLStrdup(papszTokens[1]);
        papszAttrAcronym[iAttr] = CPLStrdup(papszTokens[2]);
        pachAttrType[iAttr] = papszTokens[3][0];
        pachAttrClass[iAttr] = papszTokens[4][0];

        CSLDestroy( papszTokens );
    }

    if( fp != NULL )
        VSIFClose( fp );
    
/* -------------------------------------------------------------------- */
/*      Build unsorted index of attributes.                             */
/* -------------------------------------------------------------------- */
    nAttrCount = 0;
    for( iAttr = 0; iAttr < nAttrMax; iAttr++ )
    {
        if( papszAttrAcronym[iAttr] != NULL )
            panAttrIndex[nAttrCount++] = iAttr;
    }

/* -------------------------------------------------------------------- */
/*      Sort index by acronym.                                          */
/* -------------------------------------------------------------------- */
    int         bModified;

    do
    {
        bModified = FALSE;
        for( iAttr = 0; iAttr < nAttrCount-1; iAttr++ )
        {
            if( strcmp(papszAttrAcronym[panAttrIndex[iAttr]],
                       papszAttrAcronym[panAttrIndex[iAttr+1]]) > 0 )
            {
                int     nTemp;

                nTemp = panAttrIndex[iAttr];
                panAttrIndex[iAttr] = panAttrIndex[iAttr+1];
                panAttrIndex[iAttr+1] = nTemp;

                bModified = TRUE;
            }
        }
    } while( bModified );
    
    return TRUE;
}

/************************************************************************/
/*                         SelectClassByIndex()                         */
/************************************************************************/

int S57ClassRegistrar::SelectClassByIndex( int nNewIndex )

{
    if( nNewIndex < 0 || nNewIndex >= nClasses )
        return FALSE;

/* -------------------------------------------------------------------- */
/*      Do we have our cache of class information field lists?          */
/* -------------------------------------------------------------------- */
    if( papapszClassesFields == NULL )
    {
        papapszClassesFields = (char ***) CPLCalloc(sizeof(void*),nClasses);
    }

/* -------------------------------------------------------------------- */
/*      Has this info been parsed yet?                                  */
/* -------------------------------------------------------------------- */
    if( papapszClassesFields[nNewIndex] == NULL )
        papapszClassesFields[nNewIndex] = 
            CSLTokenizeStringComplex( papszClassesInfo[nNewIndex],
                                      ",", TRUE, TRUE );

    papszCurrentFields = papapszClassesFields[nNewIndex];

    iCurrentClass = nNewIndex;

    return TRUE;
}

/************************************************************************/
/*                             SelectClass()                            */
/************************************************************************/

int S57ClassRegistrar::SelectClass( int nOBJL )

{
    for( int i = 0; i < nClasses; i++ )
    {
        if( atoi(papszClassesInfo[i]) == nOBJL )
            return SelectClassByIndex( i );
    }

    return FALSE;
}

/************************************************************************/
/*                            SelectClass()                             */
/************************************************************************/

int S57ClassRegistrar::SelectClass( const char *pszAcronym )

{
    for( int i = 0; i < nClasses; i++ )
    {
        if( !SelectClassByIndex( i ) )
            continue;

        if( EQUAL(GetAcronym(),pszAcronym) )
            return TRUE;
    }

    return FALSE;
}

/************************************************************************/
/*                              GetOBJL()                               */
/************************************************************************/

int S57ClassRegistrar::GetOBJL()

{
    if( iCurrentClass >= 0 )
        return atoi(papszClassesInfo[iCurrentClass]);
    else
        return -1;
}

/************************************************************************/
/*                           GetDescription()                           */
/************************************************************************/

const char * S57ClassRegistrar::GetDescription()

{
    if( iCurrentClass >= 0 && papszCurrentFields[0] != NULL )
        return papszCurrentFields[1];
    else
        return NULL;
}

/************************************************************************/
/*                             GetAcronym()                             */
/************************************************************************/

const char * S57ClassRegistrar::GetAcronym()

{
    if( iCurrentClass >= 0 
        && papszCurrentFields[0] != NULL 
        && papszCurrentFields[1] != NULL )
        return papszCurrentFields[2];
    else
        return NULL;
}

/************************************************************************/
/*                          GetAttributeList()                          */
/*                                                                      */
/*      The passed string can be "a", "b", "c" or NULL for all.  The    */
/*      returned list remained owned by this object, not the caller.    */
/************************************************************************/

char **S57ClassRegistrar::GetAttributeList( const char * pszType )

{
    if( iCurrentClass < 0 )
        return NULL;
    
    CSLDestroy( papszTempResult );
    papszTempResult = NULL;
    
    for( int iColumn = 3; iColumn < 6; iColumn++ )
    {
        if( pszType != NULL && iColumn == 3 && !EQUAL(pszType,"a") )
            continue;
        
        if( pszType != NULL && iColumn == 4 && !EQUAL(pszType,"b") )
            continue;
        
        if( pszType != NULL && iColumn == 5 && !EQUAL(pszType,"c") )
            continue;

        char    **papszTokens;

        papszTokens =
            CSLTokenizeStringComplex( papszCurrentFields[iColumn], ";",
                                      TRUE, FALSE );

        papszTempResult = CSLInsertStrings( papszTempResult, -1,
                                            papszTokens );

        CSLDestroy( papszTokens );
    }

    return papszTempResult;
}

/************************************************************************/
/*                            GetClassCode()                            */
/************************************************************************/

char S57ClassRegistrar::GetClassCode()

{
    if( iCurrentClass >= 0
        && papszCurrentFields[0] != NULL
        && papszCurrentFields[1] != NULL
        && papszCurrentFields[2] != NULL
        && papszCurrentFields[3] != NULL
        && papszCurrentFields[4] != NULL
        && papszCurrentFields[5] != NULL 
        && papszCurrentFields[6] != NULL )
        return papszCurrentFields[6][0];
    else
        return '\0';
}

/************************************************************************/
/*                           GetPrimitives()                            */
/************************************************************************/

char **S57ClassRegistrar::GetPrimitives()

{
    if( iCurrentClass >= 0
        && CSLCount(papszCurrentFields) > 7 )
    {
        CSLDestroy( papszTempResult );
        papszTempResult = 
            CSLTokenizeStringComplex( papszCurrentFields[7], ";",
                                      TRUE, FALSE );
        return papszTempResult;
    }
    else
        return NULL;
}

/************************************************************************/
/*                         FindAttrByAcronym()                          */
/************************************************************************/

int     S57ClassRegistrar::FindAttrByAcronym( const char * pszName )

{
    int         iStart, iEnd, iCandidate;

    iStart = 0;
    iEnd = nAttrCount-1;

    while( iStart <= iEnd )
    {
        int     nCompareValue;
        
        iCandidate = (iStart + iEnd)/2;
        nCompareValue =
            strcmp( pszName, papszAttrAcronym[panAttrIndex[iCandidate]] );

        if( nCompareValue < 0 )
        {
            iEnd = iCandidate-1;
        }
        else if( nCompareValue > 0 )
        {
            iStart = iCandidate+1;
        }
        else
            return panAttrIndex[iCandidate];
    }

    return -1;
}