DocFormats/core/src/lib/DFCallback.c

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

#include "DFCallback.h"
#include "DFCommon.h"
#include "DFPlatform.h"
#include <assert.h>
#include <stdlib.h>

void DFCallbackAdd(DFCallback **list, DFCallbackFunction fun, void *ctx)
{
    DFCallback *item = (DFCallback *)xcalloc(1,sizeof(DFCallback));
    item->fun = fun;
    item->ctx = ctx;
    item->next = *list;
    *list = item;
}

void DFCallbackRemove(DFCallback **list, DFCallbackFunction fun, void *ctx)
{
    while (*list != NULL) {
        DFCallback *item = *list;
        if ((item->fun == fun) && (item->ctx == ctx)) {
            *list = item->next;
            free(item);
            return;
        }
    }
    assert(!"Callback not found");
}

void DFCallbackInvoke(DFCallback *list, void *object, void *data)
{
    for (DFCallback *item = list; item != NULL; item = item->next)
        item->fun(item->ctx,object,data);
}