1/* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements.  See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License.  You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "apr_buckets.h"
18#define APR_WANT_MEMFUNC
19#include "apr_want.h"
20
21static apr_status_t heap_bucket_read(apr_bucket *b, const char **str,
22                                     apr_size_t *len, apr_read_type_e block)
23{
24    apr_bucket_heap *h = b->data;
25
26    *str = h->base + b->start;
27    *len = b->length;
28    return APR_SUCCESS;
29}
30
31static void heap_bucket_destroy(void *data)
32{
33    apr_bucket_heap *h = data;
34
35    if (apr_bucket_shared_destroy(h)) {
36        (*h->free_func)(h->base);
37        apr_bucket_free(h);
38    }
39}
40
41/* Warning: if you change this function, be sure to
42 * change apr_bucket_pool_make() too! */
43APU_DECLARE(apr_bucket *) apr_bucket_heap_make(apr_bucket *b, const char *buf,
44                                               apr_size_t length,
45                                               void (*free_func)(void *data))
46{
47    apr_bucket_heap *h;
48
49    h = apr_bucket_alloc(sizeof(*h), b->list);
50
51    if (!free_func) {
52        h->alloc_len = length;
53        h->base = apr_bucket_alloc(h->alloc_len, b->list);
54        if (h->base == NULL) {
55            apr_bucket_free(h);
56            return NULL;
57        }
58        h->free_func = apr_bucket_free;
59        memcpy(h->base, buf, length);
60    }
61    else {
62        /* XXX: we lose the const qualifier here which indicates
63         * there's something screwy with the API...
64         */
65        h->base = (char *) buf;
66        h->alloc_len = length;
67        h->free_func = free_func;
68    }
69
70    b = apr_bucket_shared_make(b, h, 0, length);
71    b->type = &apr_bucket_type_heap;
72
73    return b;
74}
75
76APU_DECLARE(apr_bucket *) apr_bucket_heap_create(const char *buf,
77                                                 apr_size_t length,
78                                                 void (*free_func)(void *data),
79                                                 apr_bucket_alloc_t *list)
80{
81    apr_bucket *b = apr_bucket_alloc(sizeof(*b), list);
82
83    APR_BUCKET_INIT(b);
84    b->free = apr_bucket_free;
85    b->list = list;
86    return apr_bucket_heap_make(b, buf, length, free_func);
87}
88
89APU_DECLARE_DATA const apr_bucket_type_t apr_bucket_type_heap = {
90    "HEAP", 5, APR_BUCKET_DATA,
91    heap_bucket_destroy,
92    heap_bucket_read,
93    apr_bucket_setaside_noop,
94    apr_bucket_shared_split,
95    apr_bucket_shared_copy
96};
97