2003-02-16 22:19:28 +00:00
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/*
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+----------------------------------------------------------------------+
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2004-01-08 08:18:22 +00:00
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| PHP Version 5 |
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2003-02-16 22:19:28 +00:00
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+----------------------------------------------------------------------+
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2006-01-01 12:51:34 +00:00
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| Copyright (c) 1997-2006 The PHP Group |
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2003-02-16 22:19:28 +00:00
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+----------------------------------------------------------------------+
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2006-01-01 12:51:34 +00:00
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| This source file is subject to version 3.01 of the PHP license, |
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2003-02-16 22:19:28 +00:00
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| that is bundled with this package in the file LICENSE, and is |
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2003-06-10 20:04:29 +00:00
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| available through the world-wide-web at the following url: |
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2006-01-01 12:51:34 +00:00
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| http://www.php.net/license/3_01.txt |
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2003-02-16 22:19:28 +00:00
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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2003-02-19 08:40:19 +00:00
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| Authors: Wez Furlong <wez@thebrainroom.com> |
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2003-02-16 22:19:28 +00:00
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#include "php.h"
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#include "php_globals.h"
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#include "php_network.h"
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#include "php_open_temporary_file.h"
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#include "ext/standard/file.h"
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#include <stddef.h>
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#include <fcntl.h>
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#include "php_streams_int.h"
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2004-06-21 21:08:05 +00:00
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/* Global filter hash, copied to FG(stream_filters) on registration of volatile filter */
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2003-02-16 22:19:28 +00:00
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static HashTable stream_filters_hash;
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2004-06-21 21:08:05 +00:00
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/* Should only be used during core initialization */
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PHPAPI HashTable *php_get_stream_filters_hash_global()
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2003-02-16 22:19:28 +00:00
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{
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return &stream_filters_hash;
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}
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2004-06-21 21:08:05 +00:00
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/* Normal hash selection/retrieval call */
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PHPAPI HashTable *_php_get_stream_filters_hash(TSRMLS_D)
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{
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return (FG(stream_filters) ? FG(stream_filters) : &stream_filters_hash);
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}
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/* API for registering GLOBAL filters */
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2003-02-16 22:19:28 +00:00
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PHPAPI int php_stream_filter_register_factory(const char *filterpattern, php_stream_filter_factory *factory TSRMLS_DC)
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{
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return zend_hash_add(&stream_filters_hash, (char*)filterpattern, strlen(filterpattern), factory, sizeof(*factory), NULL);
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}
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PHPAPI int php_stream_filter_unregister_factory(const char *filterpattern TSRMLS_DC)
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{
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return zend_hash_del(&stream_filters_hash, (char*)filterpattern, strlen(filterpattern));
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}
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2004-06-21 21:08:05 +00:00
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/* API for registering VOLATILE wrappers */
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PHPAPI int php_stream_filter_register_factory_volatile(const char *filterpattern, php_stream_filter_factory *factory TSRMLS_DC)
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{
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if (!FG(stream_filters)) {
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php_stream_filter_factory tmpfactory;
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2004-09-13 21:07:22 +00:00
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ALLOC_HASHTABLE(FG(stream_filters));
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2004-06-21 21:08:05 +00:00
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zend_hash_init(FG(stream_filters), 0, NULL, NULL, 1);
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zend_hash_copy(FG(stream_filters), &stream_filters_hash, NULL, &tmpfactory, sizeof(php_stream_filter_factory));
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}
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return zend_hash_add(FG(stream_filters), (char*)filterpattern, strlen(filterpattern), factory, sizeof(*factory), NULL);
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}
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2003-02-18 01:22:21 +00:00
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/* Buckets */
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PHPAPI php_stream_bucket *php_stream_bucket_new(php_stream *stream, char *buf, size_t buflen, int own_buf, int buf_persistent TSRMLS_DC)
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{
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int is_persistent = php_stream_is_persistent(stream);
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php_stream_bucket *bucket;
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bucket = (php_stream_bucket*)pemalloc(sizeof(php_stream_bucket), is_persistent);
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if (bucket == NULL) {
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return NULL;
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}
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bucket->next = bucket->prev = NULL;
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if (is_persistent && !buf_persistent) {
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/* all data in a persistent bucket must also be persistent */
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bucket->buf = pemalloc(buflen, 1);
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if (bucket->buf == NULL) {
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pefree(bucket, 1);
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return NULL;
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}
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memcpy(bucket->buf, buf, buflen);
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bucket->buflen = buflen;
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bucket->own_buf = 1;
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} else {
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bucket->buf = buf;
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bucket->buflen = buflen;
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bucket->own_buf = own_buf;
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}
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bucket->is_persistent = is_persistent;
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bucket->refcount = 1;
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return bucket;
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}
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/* Given a bucket, returns a version of that bucket with a writeable buffer.
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* If the original bucket has a refcount of 1 and owns its buffer, then it
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* is returned unchanged.
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* Otherwise, a copy of the buffer is made.
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* In both cases, the original bucket is unlinked from its brigade.
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* If a copy is made, the original bucket is delref'd.
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* */
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PHPAPI php_stream_bucket *php_stream_bucket_make_writeable(php_stream_bucket *bucket TSRMLS_DC)
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{
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php_stream_bucket *retval;
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php_stream_bucket_unlink(bucket TSRMLS_CC);
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if (bucket->refcount == 1 && bucket->own_buf) {
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return bucket;
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}
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retval = (php_stream_bucket*)pemalloc(sizeof(php_stream_bucket), bucket->is_persistent);
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memcpy(retval, bucket, sizeof(*retval));
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retval->buf = pemalloc(retval->buflen, retval->is_persistent);
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memcpy(retval->buf, bucket->buf, retval->buflen);
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retval->refcount = 1;
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retval->own_buf = 1;
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2003-02-18 01:39:26 +00:00
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php_stream_bucket_delref(bucket TSRMLS_CC);
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2003-02-18 01:22:21 +00:00
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return retval;
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}
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PHPAPI int php_stream_bucket_split(php_stream_bucket *in, php_stream_bucket **left, php_stream_bucket **right, size_t length TSRMLS_DC)
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{
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*left = (php_stream_bucket*)pecalloc(1, sizeof(php_stream_bucket), in->is_persistent);
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*right = (php_stream_bucket*)pecalloc(1, sizeof(php_stream_bucket), in->is_persistent);
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if (*left == NULL || *right == NULL) {
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goto exit_fail;
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}
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(*left)->buf = pemalloc(length, in->is_persistent);
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(*left)->buflen = length;
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memcpy((*left)->buf, in->buf, length);
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(*left)->refcount = 1;
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(*left)->own_buf = 1;
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(*left)->is_persistent = in->is_persistent;
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(*right)->buflen = in->buflen - length;
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(*right)->buf = pemalloc((*right)->buflen, in->is_persistent);
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memcpy((*right)->buf, in->buf + length, (*right)->buflen);
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(*right)->refcount = 1;
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(*right)->own_buf = 1;
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(*right)->is_persistent = in->is_persistent;
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return SUCCESS;
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exit_fail:
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if (*right) {
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if ((*right)->buf) {
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pefree((*right)->buf, in->is_persistent);
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}
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pefree(*right, in->is_persistent);
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}
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if (*left) {
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if ((*left)->buf) {
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pefree((*left)->buf, in->is_persistent);
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}
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pefree(*left, in->is_persistent);
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}
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return FAILURE;
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}
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PHPAPI void php_stream_bucket_delref(php_stream_bucket *bucket TSRMLS_DC)
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{
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if (--bucket->refcount == 0) {
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if (bucket->own_buf) {
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pefree(bucket->buf, bucket->is_persistent);
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}
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pefree(bucket, bucket->is_persistent);
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}
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}
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PHPAPI void php_stream_bucket_prepend(php_stream_bucket_brigade *brigade, php_stream_bucket *bucket TSRMLS_DC)
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{
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bucket->next = brigade->head;
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bucket->prev = NULL;
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if (brigade->head) {
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brigade->head->prev = bucket;
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} else {
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brigade->tail = bucket;
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}
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brigade->head = bucket;
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bucket->brigade = brigade;
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}
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PHPAPI void php_stream_bucket_append(php_stream_bucket_brigade *brigade, php_stream_bucket *bucket TSRMLS_DC)
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{
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2006-01-10 16:14:16 +00:00
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if (brigade->tail == bucket) {
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return;
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}
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2003-02-18 01:22:21 +00:00
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bucket->prev = brigade->tail;
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bucket->next = NULL;
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if (brigade->tail) {
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brigade->tail->next = bucket;
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} else {
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brigade->head = bucket;
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}
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brigade->tail = bucket;
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bucket->brigade = brigade;
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}
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PHPAPI void php_stream_bucket_unlink(php_stream_bucket *bucket TSRMLS_DC)
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{
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if (bucket->prev) {
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bucket->prev->next = bucket->next;
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} else {
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bucket->brigade->head = bucket->next;
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}
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if (bucket->next) {
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bucket->next->prev = bucket->prev;
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} else {
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bucket->brigade->tail = bucket->prev;
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}
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bucket->brigade = NULL;
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bucket->next = bucket->prev = NULL;
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}
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2003-02-16 22:19:28 +00:00
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/* We allow very simple pattern matching for filter factories:
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2003-10-28 21:52:59 +00:00
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* if "convert.charset.utf-8/sjis" is requested, we search first for an exact
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* match. If that fails, we try "convert.charset.*", then "convert.*"
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2003-02-16 22:19:28 +00:00
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* This means that we don't need to clog up the hashtable with a zillion
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* charsets (for example) but still be able to provide them all as filters */
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2003-04-16 14:30:25 +00:00
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PHPAPI php_stream_filter *php_stream_filter_create(const char *filtername, zval *filterparams, int persistent TSRMLS_DC)
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2003-02-16 22:19:28 +00:00
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{
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2004-06-21 21:08:05 +00:00
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HashTable *filter_hash = (FG(stream_filters) ? FG(stream_filters) : &stream_filters_hash);
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2006-05-19 10:24:05 +00:00
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php_stream_filter_factory *factory = NULL;
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2003-02-16 22:19:28 +00:00
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php_stream_filter *filter = NULL;
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int n;
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char *period;
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n = strlen(filtername);
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2004-06-21 21:08:05 +00:00
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if (SUCCESS == zend_hash_find(filter_hash, (char*)filtername, n, (void**)&factory)) {
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2003-04-16 14:30:25 +00:00
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filter = factory->create_filter(filtername, filterparams, persistent TSRMLS_CC);
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2003-10-28 21:52:59 +00:00
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} else if ((period = strrchr(filtername, '.'))) {
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2003-02-16 22:19:28 +00:00
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/* try a wildcard */
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2003-10-28 21:52:59 +00:00
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char *wildname;
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wildname = estrdup(filtername);
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period = wildname + (period - filtername);
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2003-10-28 23:29:16 +00:00
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while (period && !filter) {
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2003-10-28 21:52:59 +00:00
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*period = '\0';
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strcat(wildname, ".*");
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2004-06-21 21:08:05 +00:00
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if (SUCCESS == zend_hash_find(filter_hash, wildname, strlen(wildname), (void**)&factory)) {
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2003-10-28 21:52:59 +00:00
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filter = factory->create_filter(filtername, filterparams, persistent TSRMLS_CC);
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}
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*period = '\0';
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period = strrchr(wildname, '.');
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2003-02-16 22:19:28 +00:00
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}
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2003-10-28 21:52:59 +00:00
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efree(wildname);
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2003-02-16 22:19:28 +00:00
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}
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if (filter == NULL) {
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/* TODO: these need correct docrefs */
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if (factory == NULL)
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php_error_docref(NULL TSRMLS_CC, E_WARNING, "unable to locate filter \"%s\"", filtername);
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else
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php_error_docref(NULL TSRMLS_CC, E_WARNING, "unable to create or locate filter \"%s\"", filtername);
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}
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return filter;
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}
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PHPAPI php_stream_filter *_php_stream_filter_alloc(php_stream_filter_ops *fops, void *abstract, int persistent STREAMS_DC TSRMLS_DC)
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{
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php_stream_filter *filter;
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filter = (php_stream_filter*) pemalloc_rel_orig(sizeof(php_stream_filter), persistent);
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memset(filter, 0, sizeof(php_stream_filter));
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filter->fops = fops;
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filter->abstract = abstract;
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filter->is_persistent = persistent;
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return filter;
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}
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PHPAPI void php_stream_filter_free(php_stream_filter *filter TSRMLS_DC)
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{
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if (filter->fops->dtor)
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filter->fops->dtor(filter TSRMLS_CC);
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pefree(filter, filter->is_persistent);
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}
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2004-05-26 21:19:21 +00:00
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PHPAPI void _php_stream_filter_prepend(php_stream_filter_chain *chain, php_stream_filter *filter TSRMLS_DC)
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2003-02-16 22:19:28 +00:00
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{
|
2003-02-18 01:22:21 +00:00
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filter->next = chain->head;
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2003-02-16 22:19:28 +00:00
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filter->prev = NULL;
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2003-02-18 01:22:21 +00:00
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if (chain->head) {
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chain->head->prev = filter;
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2003-02-16 22:19:28 +00:00
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} else {
|
2003-02-18 01:22:21 +00:00
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chain->tail = filter;
|
2003-02-16 22:19:28 +00:00
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}
|
2003-02-18 01:22:21 +00:00
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chain->head = filter;
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filter->chain = chain;
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2003-02-16 22:19:28 +00:00
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}
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2004-05-26 21:19:21 +00:00
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PHPAPI void _php_stream_filter_append(php_stream_filter_chain *chain, php_stream_filter *filter TSRMLS_DC)
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2003-02-16 22:19:28 +00:00
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{
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2004-03-31 23:48:59 +00:00
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php_stream *stream = chain->stream;
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2003-02-18 01:22:21 +00:00
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filter->prev = chain->tail;
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2003-02-16 22:19:28 +00:00
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filter->next = NULL;
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2003-02-18 01:22:21 +00:00
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if (chain->tail) {
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chain->tail->next = filter;
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2003-02-16 22:19:28 +00:00
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} else {
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2003-02-18 01:22:21 +00:00
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chain->head = filter;
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2003-02-16 22:19:28 +00:00
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}
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2003-02-18 01:22:21 +00:00
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chain->tail = filter;
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filter->chain = chain;
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2004-03-31 23:48:59 +00:00
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2004-04-01 03:52:34 +00:00
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if (&(stream->readfilters) == chain && (stream->writepos - stream->readpos) > 0) {
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2004-03-31 23:48:59 +00:00
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/* Let's going ahead and wind anything in the buffer through this filter */
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php_stream_bucket_brigade brig_in = { NULL, NULL }, brig_out = { NULL, NULL };
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php_stream_bucket_brigade *brig_inp = &brig_in, *brig_outp = &brig_out;
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php_stream_filter_status_t status;
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php_stream_bucket *bucket;
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size_t consumed = 0;
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bucket = php_stream_bucket_new(stream, stream->readbuf + stream->readpos, stream->writepos - stream->readpos, 0, 0 TSRMLS_CC);
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php_stream_bucket_append(brig_inp, bucket TSRMLS_CC);
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status = filter->fops->filter(stream, filter, brig_inp, brig_outp, &consumed, PSFS_FLAG_NORMAL TSRMLS_CC);
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2006-02-26 10:57:00 +00:00
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if (stream->readpos + consumed > (uint)stream->writepos || consumed < 0) {
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2004-03-31 23:48:59 +00:00
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/* No behaving filter should cause this. */
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status = PSFS_ERR_FATAL;
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}
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switch (status) {
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case PSFS_ERR_FATAL:
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/* If this first cycle simply fails then there's something wrong with the filter.
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Pull the filter off the chain and leave the read buffer alone. */
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if (chain->head == filter) {
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chain->head = NULL;
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chain->tail = NULL;
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} else {
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filter->prev->next = NULL;
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chain->tail = filter->prev;
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}
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php_stream_bucket_unlink(bucket TSRMLS_CC);
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php_stream_bucket_delref(bucket TSRMLS_CC);
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php_error_docref(NULL TSRMLS_CC, E_WARNING, "Filter failed to process pre-buffered data. Not adding to filterchain.");
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break;
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case PSFS_FEED_ME:
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/* We don't actually need data yet,
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leave this filter in a feed me state until data is needed.
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Reset stream's internal read buffer since the filter is "holding" it. */
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stream->readpos = 0;
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stream->writepos = 0;
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break;
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case PSFS_PASS_ON:
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/* Put any filtered data onto the readbuffer stack.
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Previously read data has been at least partially consumed. */
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stream->readpos += consumed;
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if (stream->writepos == stream->readpos) {
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/* Entirely consumed */
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stream->writepos = 0;
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stream->readpos = 0;
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}
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while (brig_outp->head) {
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bucket = brig_outp->head;
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/* Grow buffer to hold this bucket if need be.
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TODO: See warning in main/stream/streams.c::php_stream_fill_read_buffer */
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if (stream->readbuflen - stream->writepos < bucket->buflen) {
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stream->readbuflen += bucket->buflen;
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stream->readbuf = perealloc(stream->readbuf, stream->readbuflen, stream->is_persistent);
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}
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memcpy(stream->readbuf + stream->writepos, bucket->buf, bucket->buflen);
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stream->writepos += bucket->buflen;
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php_stream_bucket_unlink(bucket TSRMLS_CC);
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php_stream_bucket_delref(bucket TSRMLS_CC);
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}
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break;
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}
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}
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2003-02-16 22:19:28 +00:00
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}
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2004-09-14 03:48:17 +00:00
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PHPAPI int _php_stream_filter_flush(php_stream_filter *filter, int finish TSRMLS_DC)
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{
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php_stream_bucket_brigade brig_a = { NULL, NULL }, brig_b = { NULL, NULL }, *inp = &brig_a, *outp = &brig_b, *brig_temp;
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php_stream_bucket *bucket;
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php_stream_filter_chain *chain;
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php_stream_filter *current;
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php_stream *stream;
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size_t flushed_size = 0;
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long flags = (finish ? PSFS_FLAG_FLUSH_CLOSE : PSFS_FLAG_FLUSH_INC);
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if (!filter->chain || !filter->chain->stream) {
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/* Filter is not attached to a chain, or chain is somehow not part of a stream */
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return FAILURE;
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}
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chain = filter->chain;
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stream = chain->stream;
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for(current = filter; current; current = current->next) {
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php_stream_filter_status_t status;
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status = filter->fops->filter(stream, filter, inp, outp, NULL, flags TSRMLS_CC);
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if (status == PSFS_FEED_ME) {
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/* We've flushed the data far enough */
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return SUCCESS;
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}
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if (status == PSFS_ERR_FATAL) {
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return FAILURE;
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}
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/* Otherwise we have data available to PASS_ON
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Swap the brigades and continue */
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brig_temp = inp;
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inp = outp;
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outp = brig_temp;
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outp->head = NULL;
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outp->tail = NULL;
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flags = PSFS_FLAG_NORMAL;
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}
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/* Last filter returned data via PSFS_PASS_ON
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Do something with it */
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for(bucket = inp->head; bucket; bucket = bucket->next) {
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flushed_size += bucket->buflen;
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}
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if (flushed_size == 0) {
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/* Unlikely, but possible */
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return SUCCESS;
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}
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if (chain == &(stream->readfilters)) {
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/* Dump any newly flushed data to the read buffer */
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if (stream->readpos > 0) {
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/* Back the buffer up */
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memcpy(stream->readbuf, stream->readbuf + stream->readpos, stream->writepos - stream->readpos);
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stream->readpos = 0;
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stream->writepos -= stream->readpos;
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}
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if (flushed_size > (stream->readbuflen - stream->writepos)) {
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/* Grow the buffer */
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stream->readbuf = perealloc(stream->readbuf, stream->writepos + flushed_size + stream->chunk_size, stream->is_persistent);
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}
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while ((bucket = inp->head)) {
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memcpy(stream->readbuf + stream->writepos, bucket->buf, bucket->buflen);
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stream->writepos += bucket->buflen;
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php_stream_bucket_unlink(bucket TSRMLS_CC);
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php_stream_bucket_delref(bucket TSRMLS_CC);
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}
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} else if (chain == &(stream->writefilters)) {
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/* Send flushed data to the stream */
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while ((bucket = inp->head)) {
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stream->ops->write(stream, bucket->buf, bucket->buflen TSRMLS_CC);
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php_stream_bucket_unlink(bucket TSRMLS_CC);
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php_stream_bucket_delref(bucket TSRMLS_CC);
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}
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}
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return SUCCESS;
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}
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2003-02-18 01:22:21 +00:00
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PHPAPI php_stream_filter *php_stream_filter_remove(php_stream_filter *filter, int call_dtor TSRMLS_DC)
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2003-02-16 22:19:28 +00:00
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{
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if (filter->prev) {
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filter->prev->next = filter->next;
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} else {
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2003-02-18 01:22:21 +00:00
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filter->chain->head = filter->next;
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2003-02-16 22:19:28 +00:00
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}
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if (filter->next) {
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filter->next->prev = filter->prev;
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} else {
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2003-02-18 01:22:21 +00:00
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filter->chain->tail = filter->prev;
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2003-02-16 22:19:28 +00:00
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}
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2005-03-29 04:02:03 +00:00
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if (filter->rsrc_id > 0) {
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zend_list_delete(filter->rsrc_id);
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}
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2003-02-16 22:19:28 +00:00
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if (call_dtor) {
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php_stream_filter_free(filter TSRMLS_CC);
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return NULL;
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}
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return filter;
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}
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: noet sw=4 ts=4 fdm=marker
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* vim<600: noet sw=4 ts=4
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*/
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