| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2000 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| #include "httpd.h" |
| #include "ap_buckets.h" |
| #include <stdlib.h> |
| |
| /* |
| * We can't simplify this function by using an ap_bucket_make function |
| * because we aren't sure of the exact type of this bucket. |
| */ |
| static apr_status_t simple_split(ap_bucket *a, apr_off_t point) |
| { |
| ap_bucket *b; |
| ap_bucket_simple *ad, *bd; |
| |
| if (point < 0 || point > a->length) { |
| return APR_EINVAL; |
| } |
| |
| b = malloc(sizeof(*b)); |
| if (b == NULL) { |
| return APR_ENOMEM; |
| } |
| bd = malloc(sizeof(*bd)); |
| if (bd == NULL) { |
| free(b); |
| return APR_ENOMEM; |
| } |
| *b = *a; |
| ad = a->data; |
| b->data = bd; |
| *bd = *ad; |
| |
| a->length = point; |
| ad->end = ad->start + point; |
| b->length -= point; |
| bd->start += point; |
| |
| AP_BUCKET_INSERT_AFTER(a, b); |
| |
| return APR_SUCCESS; |
| } |
| |
| static apr_status_t simple_read(ap_bucket *b, const char **str, |
| apr_size_t *len, ap_read_type block) |
| { |
| ap_bucket_simple *bd = b->data; |
| *str = bd->start; |
| *len = bd->end - bd->start; |
| return APR_SUCCESS; |
| } |
| |
| AP_DECLARE(ap_bucket *) ap_bucket_make_immortal(ap_bucket *b, |
| const char *buf, apr_size_t length) |
| { |
| ap_bucket_simple *bd; |
| |
| bd = malloc(sizeof(*bd)); |
| if (bd == NULL) { |
| return NULL; |
| } |
| |
| bd->start = buf; |
| bd->end = buf+length; |
| |
| b->type = &ap_immortal_type; |
| b->length = length; |
| b->data = bd; |
| |
| return b; |
| } |
| |
| AP_DECLARE(ap_bucket *) ap_bucket_create_immortal( |
| const char *buf, apr_size_t length) |
| { |
| ap_bucket_do_create(ap_bucket_make_immortal(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 ap_brigade_setaside() |
| * function that co-ordinates the action of all the bucket setaside |
| * functions to improve memory efficiency. |
| */ |
| static apr_status_t transient_setaside(ap_bucket *b) |
| { |
| ap_bucket_simple *bd; |
| const char *start, *end; |
| apr_size_t w; |
| |
| bd = b->data; |
| start = bd->start; |
| end = bd->end; |
| /* XXX: handle small heap buckets */ |
| b = ap_bucket_make_heap(b, start, end-start, 1, &w); |
| if (b == NULL || w != end-start) { |
| return APR_ENOMEM; |
| } |
| free(bd); |
| return APR_SUCCESS; |
| } |
| |
| AP_DECLARE(ap_bucket *) ap_bucket_make_transient(ap_bucket *b, |
| const char *buf, apr_size_t length) |
| { |
| b = ap_bucket_make_immortal(b, buf, length); |
| if (b == NULL) { |
| return NULL; |
| } |
| b->type = &ap_transient_type; |
| return b; |
| } |
| |
| AP_DECLARE(ap_bucket *) ap_bucket_create_transient( |
| const char *buf, apr_size_t length) |
| { |
| ap_bucket_do_create(ap_bucket_make_transient(b, buf, length)); |
| } |
| |
| const ap_bucket_type ap_immortal_type = { |
| "IMMORTAL", 4, |
| free, |
| simple_read, |
| ap_bucket_setaside_notimpl, |
| simple_split |
| }; |
| |
| const ap_bucket_type ap_transient_type = { |
| "TRANSIENT", 4, |
| ap_bucket_destroy_notimpl, |
| simple_read, |
| transient_setaside, |
| simple_split |
| }; |