| /* 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" |
| |
| APU_DECLARE_NONSTD(apr_status_t) apr_bucket_simple_copy(apr_bucket *a, |
| apr_bucket **b) |
| { |
| *b = apr_bucket_alloc(sizeof(**b), a->list); /* XXX: check for failure? */ |
| **b = *a; |
| |
| return APR_SUCCESS; |
| } |
| |
| APU_DECLARE_NONSTD(apr_status_t) apr_bucket_simple_split(apr_bucket *a, |
| apr_size_t point) |
| { |
| apr_bucket *b; |
| |
| if (point > a->length) { |
| return APR_EINVAL; |
| } |
| |
| apr_bucket_simple_copy(a, &b); |
| |
| a->length = point; |
| b->length -= point; |
| b->start += point; |
| |
| APR_BUCKET_INSERT_AFTER(a, b); |
| |
| return APR_SUCCESS; |
| } |
| |
| static apr_status_t simple_bucket_read(apr_bucket *b, const char **str, |
| apr_size_t *len, apr_read_type_e block) |
| { |
| *str = (char *)b->data + b->start; |
| *len = b->length; |
| return APR_SUCCESS; |
| } |
| |
| APU_DECLARE(apr_bucket *) apr_bucket_immortal_make(apr_bucket *b, |
| const char *buf, |
| apr_size_t length) |
| { |
| b->data = (char *)buf; |
| b->length = length; |
| b->start = 0; |
| b->type = &apr_bucket_type_immortal; |
| |
| return b; |
| } |
| |
| APU_DECLARE(apr_bucket *) apr_bucket_immortal_create(const char *buf, |
| apr_size_t length, |
| 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_immortal_make(b, buf, length); |
| } |
| |
| /* |
| * XXX: This function could do with some tweaking to reduce memory |
| * usage in various cases, e.g. share buffers in the heap between all |
| * the buckets that are set aside, or even spool set-aside data to |
| * disk if it gets too voluminous (but if it does then that's probably |
| * a bug elsewhere). There should probably be a apr_brigade_setaside() |
| * function that co-ordinates the action of all the bucket setaside |
| * functions to improve memory efficiency. |
| */ |
| static apr_status_t transient_bucket_setaside(apr_bucket *b, apr_pool_t *pool) |
| { |
| b = apr_bucket_heap_make(b, (char *)b->data + b->start, b->length, NULL); |
| if (b == NULL) { |
| return APR_ENOMEM; |
| } |
| return APR_SUCCESS; |
| } |
| |
| APU_DECLARE(apr_bucket *) apr_bucket_transient_make(apr_bucket *b, |
| const char *buf, |
| apr_size_t length) |
| { |
| b->data = (char *)buf; |
| b->length = length; |
| b->start = 0; |
| b->type = &apr_bucket_type_transient; |
| return b; |
| } |
| |
| APU_DECLARE(apr_bucket *) apr_bucket_transient_create(const char *buf, |
| apr_size_t length, |
| 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_transient_make(b, buf, length); |
| } |
| |
| const apr_bucket_type_t apr_bucket_type_immortal = { |
| "IMMORTAL", 5, APR_BUCKET_DATA, |
| apr_bucket_destroy_noop, |
| simple_bucket_read, |
| apr_bucket_setaside_noop, |
| apr_bucket_simple_split, |
| apr_bucket_simple_copy |
| }; |
| |
| APU_DECLARE_DATA const apr_bucket_type_t apr_bucket_type_transient = { |
| "TRANSIENT", 5, APR_BUCKET_DATA, |
| apr_bucket_destroy_noop, |
| simple_bucket_read, |
| transient_bucket_setaside, |
| apr_bucket_simple_split, |
| apr_bucket_simple_copy |
| }; |