ugkfeature.cpp

linux下一款GIS程序源码

        return szTempBuffer;
    }
    else if( poFDefn->GetType() == OFTIntegerList )
    {
        char    szItem[32];
        int     i, nCount = pauFields[iField].IntegerList.nCount;

        sprintf( szTempBuffer, "(%d:", nCount );
        for( i = 0; i < nCount; i++ )
        {
            sprintf( szItem, "%d", pauFields[iField].IntegerList.paList[i] );
            if( strlen(szTempBuffer) + strlen(szItem) + 6
                > sizeof(szTempBuffer) )
            {
                break;
            }
            
            if( i > 0 )
                strcat( szTempBuffer, "," );
            
            strcat( szTempBuffer, szItem );
        }

        if( i < nCount )
            strcat( szTempBuffer, ",...)" );
        else
            strcat( szTempBuffer, ")" );
        
        return szTempBuffer;
    }
    else if( poFDefn->GetType() == OFTRealList )
    {
        char    szItem[40];
        char    szFormat[64];
        int     i, nCount = pauFields[iField].RealList.nCount;

        if( poFDefn->GetWidth() != 0 )
        {
            sprintf( szFormat, "%%%d.%df",
                     poFDefn->GetWidth(), poFDefn->GetPrecision() );
        }
        else
            strcpy( szFormat, "%.16g" );
        
        sprintf( szTempBuffer, "(%d:", nCount );
        for( i = 0; i < nCount; i++ )
        {
            sprintf( szItem, szFormat, pauFields[iField].RealList.paList[i] );
            if( strlen(szTempBuffer) + strlen(szItem) + 6
                > sizeof(szTempBuffer) )
            {
                break;
            }
            
            if( i > 0 )
                strcat( szTempBuffer, "," );
            
            strcat( szTempBuffer, szItem );
        }

        if( i < nCount )
            strcat( szTempBuffer, ",...)" );
        else
            strcat( szTempBuffer, ")" );
        
        return szTempBuffer;
    }
    else if( poFDefn->GetType() == OFTStringList )
    {
        int     i, nCount = pauFields[iField].StringList.nCount;

        sprintf( szTempBuffer, "(%d:", nCount );
        for( i = 0; i < nCount; i++ )
        {
            const char  *pszItem = pauFields[iField].StringList.paList[i];
            
            if( strlen(szTempBuffer) + strlen(pszItem)  + 6
                > sizeof(szTempBuffer) )
            {
                break;
            }

            if( i > 0 )
                strcat( szTempBuffer, "," );
            
            strcat( szTempBuffer, pszItem );
        }

        if( i < nCount )
            strcat( szTempBuffer, ",...)" );
        else
            strcat( szTempBuffer, ")" );
        
        return szTempBuffer;
    }
    else
        return "";
}



/************************************************************************/
/*                       GetFieldAsIntegerList()                        */
/************************************************************************/

/**
 * Fetch field value as a list of integers.
 *
 * Currently this method only works for OFTIntegerList fields.
 *
 * @param iField the field to fetch, from 0 to GetFieldCount()-1.
 * @param pnCount an integer to put the list count (number of integers) into.
 *
 * @return the field value.  This list is internal, and should not be
 * modified, or freed.  It's lifetime may be very brief.  If *pnCount is zero
 * on return the returned pointer may be NULL or non-NULL.
 */

const int *UGKFeature::GetFieldAsIntegerList( int iField, int *pnCount )

{
    UGKFieldDefn        *poFDefn = poDefn->GetFieldDefn( iField );

    assert( poFDefn != NULL || iField == -1 );
    if( poFDefn == NULL )
        return NULL;
    
    if( !IsFieldSet(iField) )
        return NULL;
    
    if( poFDefn->GetType() == OFTIntegerList )
    {
        if( pnCount != NULL )
            *pnCount = pauFields[iField].IntegerList.nCount;

        return pauFields[iField].IntegerList.paList;
    }
    else
    {
        if( pnCount != NULL )
            *pnCount = 0;
        
        return NULL;
    }
}



/************************************************************************/
/*                        GetFieldAsDoubleList()                        */
/************************************************************************/

/**
 * Fetch field value as a list of doubles.
 *
 * Currently this method only works for OFTRealList fields.
 *
 * @param iField the field to fetch, from 0 to GetFieldCount()-1.
 * @param pnCount an integer to put the list count (number of doubles) into.
 *
 * @return the field value.  This list is internal, and should not be
 * modified, or freed.  It's lifetime may be very brief.  If *pnCount is zero
 * on return the returned pointer may be NULL or non-NULL.
 */

const double *UGKFeature::GetFieldAsDoubleList( int iField, int *pnCount )

{
    UGKFieldDefn        *poFDefn = poDefn->GetFieldDefn( iField );

    assert( poFDefn != NULL || iField == -1 );
    if( poFDefn == NULL )
        return NULL;
    
    if( !IsFieldSet(iField) )
        return NULL;
    
    if( poFDefn->GetType() == OFTRealList )
    {
        if( pnCount != NULL )
            *pnCount = pauFields[iField].RealList.nCount;

        return pauFields[iField].RealList.paList;
    }
    else
    {
        if( pnCount != NULL )
            *pnCount = 0;
        
        return NULL;
    }
}



/************************************************************************/
/*                        GetFieldAsStringList()                        */
/************************************************************************/

/**
 * Fetch field value as a list of strings.
 *
 * Currently this method only works for OFTStringList fields.
 *
 * @param iField the field to fetch, from 0 to GetFieldCount()-1.
 *
 * @return the field value.  This list is internal, and should not be
 * modified, or freed.  It's lifetime may be very brief.
 */

char **UGKFeature::GetFieldAsStringList( int iField )

{
    UGKFieldDefn        *poFDefn = poDefn->GetFieldDefn( iField );

    assert( poFDefn != NULL || iField == -1 );
    if( poFDefn == NULL )
        return NULL;
    
    if( !IsFieldSet(iField) )
        return NULL;
    
    if( poFDefn->GetType() == OFTStringList )
    {
        return pauFields[iField].StringList.paList;
    }
    else
    {
        return NULL;
    }
}



/************************************************************************/
/*                              SetField()                              */
/************************************************************************/

/**         
 * Set field to integer value. 
 *
 * OFTInteger and OFTReal fields will be set directly.  OFTString fields
 * will be assigned a string representation of the value, but not necessarily
 * taking into account formatting constraints on this field.  Other field
 * types may be unaffected.
 *
 * @param iField the field to fetch, from 0 to GetFieldCount()-1.
 * @param nValue the value to assign.
 */

void UGKFeature::SetField( int iField, int nValue )

{
    UGKFieldDefn        *poFDefn = poDefn->GetFieldDefn( iField );

    assert( poFDefn != NULL || iField == -1 );
    if( poFDefn == NULL )
        return;
    
    if( poFDefn->GetType() == OFTInteger )
    {
        pauFields[iField].Integer = nValue;
        pauFields[iField].Set.nMarker2 = 0;
    }
    else if( poFDefn->GetType() == OFTReal )
    {
        pauFields[iField].Real = nValue;
    }
    else if( poFDefn->GetType() == OFTString )
    {
        char    szTempBuffer[64];

        sprintf( szTempBuffer, "%d", nValue );

        if( IsFieldSet( iField) )
            UGK_Free( pauFields[iField].String );
        
        pauFields[iField].String = UGKStrdup( szTempBuffer );
    }
    else
        /* do nothing for other field types */;
}


/************************************************************************/
/*                              SetField()                              */
/************************************************************************/

/**
 * Set field to double value. 
 *
 * OFTInteger and OFTReal fields will be set directly.  OFTString fields
 * will be assigned a string representation of the value, but not necessarily
 * taking into account formatting constraints on this field.  Other field
 * types may be unaffected.
 *
 * @param iField the field to fetch, from 0 to GetFieldCount()-1.
 * @param dfValue the value to assign.
 */

void UGKFeature::SetField( int iField, double dfValue )

{
    UGKFieldDefn        *poFDefn = poDefn->GetFieldDefn( iField );

    assert( poFDefn != NULL || iField == -1 );
    if( poFDefn == NULL )
        return;
    
    if( poFDefn->GetType() == OFTReal )
    {
        pauFields[iField].Real = dfValue;
    }
    else if( poFDefn->GetType() == OFTInteger )
    {
        pauFields[iField].Integer = (int) dfValue;
        pauFields[iField].Set.nMarker2 = 0;
    }
    else if( poFDefn->GetType() == OFTString )
    {
        char    szTempBuffer[128];

        sprintf( szTempBuffer, "%.16g", dfValue );

        if( IsFieldSet( iField) )
            UGK_Free( pauFields[iField].String );

        pauFields[iField].String = UGKStrdup( szTempBuffer );
    }
    else
        /* do nothing for other field types */;
}


/************************************************************************/
/*                              SetField()                              */
/************************************************************************/

/**
 * Set field to string value. 
 *
 * OFTInteger fields will be set based on an atoi() conversion of the string.
 * OFTReal fields will be set based on an atof() conversion of the string.
 * Other field types may be unaffected.
 *
 * @param iField the field to fetch, from 0 to GetFieldCount()-1.
 * @param pszValue the value to assign.
 */

void UGKFeature::SetField( int iField, const char * pszValue )

{
    UGKFieldDefn        *poFDefn = poDefn->GetFieldDefn( iField );

    assert( poFDefn != NULL || iField == -1 );
    if( poFDefn == NULL )
        return;
    
    if( poFDefn->GetType() == OFTString )
    {
        if( IsFieldSet(iField) )
            UGK_Free( pauFields[iField].String );
            
        pauFields[iField].String = UGKStrdup( pszValue );
    }
    else if( poFDefn->GetType() == OFTInteger )
    {
        pauFields[iField].Integer = atoi(pszValue);
        pauFields[iField].Set.nMarker2 = UGKUnsetMarker;
    }
    else if( poFDefn->GetType() == OFTReal )
    {
        pauFields[iField].Real = atof(pszValue);
    }
    else
        /* do nothing for other field types */;
}


/************************************************************************/
/*                              SetField()                              */
/************************************************************************/

/**
 * Set field to list of integers value. 
 *
 * This method currently on has an effect of OFTIntegerList fields.
 *
 * @param iField the field to set, from 0 to GetFieldCount()-1.
 * @param nCount the number of values in the list being assigned.
 * @param panValues the values to assign.
 */

void UGKFeature::SetField( int iField, int nCount, int *panValues )

{
    UGKFieldDefn        *poFDefn = poDefn->GetFieldDefn( iField );

    assert( poFDefn != NULL || iField == -1 );
    if( poFDefn == NULL )
        return;
    
    if( poFDefn->GetType() == OFTIntegerList )
    {
        UGKField        uField;

        uField.IntegerList.nCount = nCount;
        uField.IntegerList.paList = panValues;

        SetField( iField, &uField );
    }
}


/************************************************************************/
/*                              SetField()                              */
/************************************************************************/

/**
 * Set field to list of doubles value. 
 *
 * This method currently on has an effect of OFTRealList fields.
 *
 * @param iField the field to set, from 0 to GetFieldCount()-1.
 * @param nCount the number of values in the list being assigned.
 * @param padfValues the values to assign.
 */

void UGKFeature::SetField( int iField, int nCount, double * padfValues )

{
    UGKFieldDefn        *poFDefn = poDefn->GetFieldDefn( iField );

    assert( poFDefn != NULL || iField == -1 );
    if( poFDefn == NULL )
        return;
    
    if( poFDefn->GetType() == OFTRealList )
    {
        UGKField        uField;
        
        uField.RealList.nCount = nCount;
        uField.RealList.paList = padfValues;
        
        SetField( iField, &uField );
    }