ogrfeature.cpp

在linux环境下

/*                     OGR_F_GetFieldAsDoubleList()                     */
/************************************************************************/

/**
 * Fetch field value as a list of doubles.
 *
 * Currently this function only works for OFTRealList fields.
 *
 * This function is the same as the CPP method 
 * OGRFeature::GetFieldAsDoubleList().
 *
 * @param hFeat handle to the feature that owned the field.
 * @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 *OGR_F_GetFieldAsDoubleList( OGRFeatureH hFeat, int iField, 
                                          int *pnCount )

{
    return ((OGRFeature *)hFeat)->GetFieldAsDoubleList(iField, pnCount);
}

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

/**
 * Fetch field value as a list of strings.
 *
 * Currently this method only works for OFTStringList fields.
 *
 * This method is the same as the C function OGR_F_GetFieldAsStringList().
 *
 * @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 **OGRFeature::GetFieldAsStringList( int iField )

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

    CPLAssert( 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;
    }
}

/************************************************************************/
/*                     OGR_F_GetFieldAsStringList()                     */
/************************************************************************/

/**
 * Fetch field value as a list of strings.
 *
 * Currently this method only works for OFTStringList fields.
 *
 * This function is the same as the CPP method 
 * OGRFeature::GetFieldAsStringList().
 *
 * @param hFeat handle to the feature that owned the field.
 * @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 **OGR_F_GetFieldAsStringList( OGRFeatureH hFeat, int iField )

{
    return ((OGRFeature *)hFeat)->GetFieldAsStringList(iField);
}

/************************************************************************/
/*                              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.
 *
 * This method is the same as the C function OGR_F_SetFieldInteger().
 *
 * @param iField the field to fetch, from 0 to GetFieldCount()-1.
 * @param nValue the value to assign.
 */

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

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

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

/************************************************************************/
/*                       OGR_F_SetFieldInteger()                        */
/************************************************************************/

/**
 * 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.
 *
 * This function is the same as the CPP method OGRFeature::SetField().
 *
 * @param hFeat handle to the feature that owned the field.
 * @param iField the field to fetch, from 0 to GetFieldCount()-1.
 * @param nValue the value to assign.
 */

void OGR_F_SetFieldInteger( OGRFeatureH hFeat, int iField, int nValue )

{
    ((OGRFeature *)hFeat)->SetField( iField, nValue );
}

/************************************************************************/
/*                              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.
 *
 * This method is the same as the C function OGR_F_SetFieldDouble().
 *
 * @param iField the field to fetch, from 0 to GetFieldCount()-1.
 * @param dfValue the value to assign.
 */

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

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

    CPLAssert( 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) )
            CPLFree( pauFields[iField].String );

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

/************************************************************************/
/*                        OGR_F_SetFieldDouble()                        */
/************************************************************************/

/**
 * 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.
 *
 * This function is the same as the CPP method OGRFeature::SetField().
 *
 * @param hFeat handle to the feature that owned the field.
 * @param iField the field to fetch, from 0 to GetFieldCount()-1.
 * @param dfValue the value to assign.
 */

void OGR_F_SetFieldDouble( OGRFeatureH hFeat, int iField, double dfValue )

{
    ((OGRFeature *)hFeat)->SetField( iField, dfValue );
}

/************************************************************************/
/*                              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.
 *
 * This method is the same as the C function OGR_F_SetFieldString().
 *
 * @param iField the field to fetch, from 0 to GetFieldCount()-1.
 * @param pszValue the value to assign.
 */

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

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

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

/************************************************************************/
/*                        OGR_F_SetFieldString()                        */
/************************************************************************/

/**
 * 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.
 *
 * This function is the same as the CPP method OGRFeature::SetField().
 *
 * @param hFeat handle to the feature that owned the field.
 * @param iField the field to fetch, from 0 to GetFieldCount()-1.
 * @param pszValue the value to assign.
 */

void OGR_F_SetFieldString( OGRFeatureH hFeat, int iField, const char *pszValue)

{
    ((OGRFeature *)hFeat)->SetField( iField, pszValue );
}

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

/**
 * Set field to list of integers value. 
 *
 * This method currently on has an effect of OFTIntegerList fields.
 *
 * This method is the same as the C function OGR_F_SetFieldIntegerList().
 *
 * @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 OGRFeature::SetField( int iField, int nCount, int *panValues )

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

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

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

        SetField( iField, &uField );
    }
}

/************************************************************************/
/*                     OGR_F_SetFieldIntegerList()                      */
/************************************************************************/

/**
 * Set field to list of integers value. 
 *
 * This function currently on has an effect of OFTIntegerList fields.
 *
 * This function is the same as the CPP method OGRFeature::SetField().
 *
 * @param hFeat handle to the feature that owned the field.
 * @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 OGR_F_SetFieldIntegerList( OGRFeatureH hFeat, int iField, 
                                int nCount, int *panValues )

{
    ((OGRFeature *)hFeat)->SetField( iField, nCount, panValues );
}

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

/**
 * Set field to list of doubles value. 
 *
 * This method currently on has an effect of OFTRealList fields.
 *
 * This method is the same as the C function OGR_F_SetFieldDoubleList().
 *
 * @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 OGRFeature::SetField( int iField, int nCount, double * padfValues )

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

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

/************************************************************************/
/*                      OGR_F_SetFieldDoubleList()                      */
/************************************************************************/

/**
 * Set field to list of doubles value. 
 *
 * This function currently on has an effect of OFTRealList fields.