/* 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 "apr_buckets.h"

#define APR_WANT_MEMFUNC

#include "apr_want.h"

static apr_status_t heap_bucket_read(apr_bucket *b, const char **str,

                                     apr_size_t *len, apr_read_type_e block)

{

    apr_bucket_heap *h = b->data;

    *str = h->base + b->start;

    *len = b->length;

    return APR_SUCCESS;

}

static void heap_bucket_destroy(void *data)

{

    apr_bucket_heap *h = data;

    if (apr_bucket_shared_destroy(h)) {

        (*h->free_func)(h->base);

        apr_bucket_free(h);

    }

}

/* Warning: if you change this function, be sure to

 * change apr_bucket_pool_make() too! */

APR_DECLARE(apr_bucket *) apr_bucket_heap_make(apr_bucket *b, const char *buf,

                                               apr_size_t length,

                                               void (*free_func)(void *data))

{

    apr_bucket_heap *h;

    h = apr_bucket_alloc(sizeof(*h), b->list);

    if (!free_func) {

        h->alloc_len = length;

        h->base = apr_bucket_alloc(h->alloc_len, b->list);

        if (h->base == NULL) {

            apr_bucket_free(h);

            return NULL;

        }

        h->free_func = apr_bucket_free;

        memcpy(h->base, buf, length);

    }

    else {

        /* XXX: we lose the const qualifier here which indicates

         * there's something screwy with the API...

         */

        h->base = (char *) buf;

        h->alloc_len = length;

        h->free_func = free_func;

    }

    b = apr_bucket_shared_make(b, h, 0, length);

    b->type = &apr_bucket_type_heap;

    return b;

}

APR_DECLARE(apr_bucket *) apr_bucket_heap_create(const char *buf,

                                                 apr_size_t length,

                                                 void (*free_func)(void *data),

                                                 apr_bucket_alloc_t *list)

{

    apr_bucket *b = apr_bucket_alloc(sizeof(*b), list);

    APR_BUCKET_INIT(b);

    b->free = apr_bucket_free;

    b->list = list;

    return apr_bucket_heap_make(b, buf, length, free_func);

}

APR_DECLARE_DATA const apr_bucket_type_t apr_bucket_type_heap = {

    "HEAP", 5, APR_BUCKET_DATA,

    heap_bucket_destroy,

    heap_bucket_read,

    apr_bucket_setaside_noop,

    apr_bucket_shared_split,

    apr_bucket_shared_copy

};