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/* Licensed to the Apache Software Foundation (ASF) under one or more
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383869 |
* contributor license agreements. See the NOTICE file distributed with
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383869 |
* this work for additional information regarding copyright ownership.
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383869 |
* The ASF licenses this file to You under the Apache License, Version 2.0
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383869 |
* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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383869 |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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383869 |
* See the License for the specific language governing permissions and
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383869 |
* limitations under the License.
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383869 |
*/
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "apr_pools.h"
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#include "apr_tables.h"
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#include "apr.h"
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#include "apr_hooks.h"
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#include "apr_hash.h"
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#include "apr_optional_hooks.h"
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#include "apr_optional.h"
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#define APR_WANT_MEMFUNC
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#define APR_WANT_STRFUNC
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#include "apr_want.h"
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#if 0
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#define apr_palloc(pool,size) malloc(size)
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#endif
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APU_DECLARE_DATA apr_pool_t *apr_hook_global_pool = NULL;
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APU_DECLARE_DATA int apr_hook_debug_enabled = 0;
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APU_DECLARE_DATA const char *apr_hook_debug_current = NULL;
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|
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/** @deprecated @see apr_hook_global_pool */
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APU_DECLARE_DATA apr_pool_t *apr_global_hook_pool = NULL;
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/** @deprecated @see apr_hook_debug_enabled */
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APU_DECLARE_DATA int apr_debug_module_hooks = 0;
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/** @deprecated @see apr_hook_debug_current */
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APU_DECLARE_DATA const char *apr_current_hooking_module = NULL;
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/* NB: This must echo the LINK_##name structure */
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typedef struct
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{
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void (*dummy)(void *);
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const char *szName;
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const char * const *aszPredecessors;
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const char * const *aszSuccessors;
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int nOrder;
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} TSortData;
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typedef struct tsort_
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{
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void *pData;
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int nPredecessors;
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struct tsort_ **ppPredecessors;
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struct tsort_ *pNext;
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} TSort;
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#ifdef NETWARE
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#include "apr_private.h"
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#define get_apd APP_DATA* apd = (APP_DATA*)get_app_data(gLibId);
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#define s_aHooksToSort ((apr_array_header_t *)(apd->gs_aHooksToSort))
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#define s_phOptionalHooks ((apr_hash_t *)(apd->gs_phOptionalHooks))
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#define s_phOptionalFunctions ((apr_hash_t *)(apd->gs_phOptionalFunctions))
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#endif
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static int crude_order(const void *a_,const void *b_)
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{
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const TSortData *a=a_;
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const TSortData *b=b_;
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return a->nOrder-b->nOrder;
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}
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static TSort *prepare(apr_pool_t *p,TSortData *pItems,int nItems)
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{
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TSort *pData=apr_palloc(p,nItems*sizeof *pData);
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int n;
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qsort(pItems,nItems,sizeof *pItems,crude_order);
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for(n=0 ; n < nItems ; ++n) {
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pData[n].nPredecessors=0;
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pData[n].ppPredecessors=apr_pcalloc(p,nItems*sizeof *pData[n].ppPredecessors);
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pData[n].pNext=NULL;
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pData[n].pData=&pItems[n];
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}
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for(n=0 ; n < nItems ; ++n) {
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int i,k;
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for(i=0 ; pItems[n].aszPredecessors && pItems[n].aszPredecessors[i] ; ++i)
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for(k=0 ; k < nItems ; ++k)
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if(!strcmp(pItems[k].szName,pItems[n].aszPredecessors[i])) {
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int l;
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for(l=0 ; l < pData[n].nPredecessors ; ++l)
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if(pData[n].ppPredecessors[l] == &pData[k])
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goto got_it;
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pData[n].ppPredecessors[pData[n].nPredecessors]=&pData[k];
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++pData[n].nPredecessors;
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got_it:
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break;
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}
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for(i=0 ; pItems[n].aszSuccessors && pItems[n].aszSuccessors[i] ; ++i)
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for(k=0 ; k < nItems ; ++k)
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if(!strcmp(pItems[k].szName,pItems[n].aszSuccessors[i])) {
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int l;
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for(l=0 ; l < pData[k].nPredecessors ; ++l)
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if(pData[k].ppPredecessors[l] == &pData[n])
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goto got_it2;
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pData[k].ppPredecessors[pData[k].nPredecessors]=&pData[n];
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++pData[k].nPredecessors;
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got_it2:
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break;
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}
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}
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return pData;
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}
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/* Topologically sort, dragging out-of-order items to the front. Note that
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this tends to preserve things that want to be near the front better, and
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changing that behaviour might compromise some of Apache's behaviour (in
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particular, mod_log_forensic might otherwise get pushed to the end, and
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core.c's log open function used to end up at the end when pushing items
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to the back was the methedology). Also note that the algorithm could
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go back to its original simplicity by sorting from the back instead of
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the front.
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*/
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static TSort *tsort(TSort *pData,int nItems)
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{
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int nTotal;
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TSort *pHead=NULL;
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TSort *pTail=NULL;
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for(nTotal=0 ; nTotal < nItems ; ++nTotal) {
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int n,i,k;
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for(n=0 ; ; ++n) {
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if(n == nItems)
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assert(0); /* we have a loop... */
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if(!pData[n].pNext) {
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if(pData[n].nPredecessors) {
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for(k=0 ; ; ++k) {
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assert(k < nItems);
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if(pData[n].ppPredecessors[k])
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break;
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}
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for(i=0 ; ; ++i) {
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assert(i < nItems);
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if(&pData[i] == pData[n].ppPredecessors[k]) {
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n=i-1;
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break;
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}
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}
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} else
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break;
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}
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}
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if(pTail)
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pTail->pNext=&pData[n];
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else
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pHead=&pData[n];
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pTail=&pData[n];
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pTail->pNext=pTail; /* fudge it so it looks linked */
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for(i=0 ; i < nItems ; ++i)
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383869 |
for(k=0 ; k < nItems ; ++k)
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383869 |
if(pData[i].ppPredecessors[k] == &pData[n]) {
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383869 |
--pData[i].nPredecessors;
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pData[i].ppPredecessors[k]=NULL;
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383869 |
break;
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|
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383869 |
}
|
|
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383869 |
}
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pTail->pNext=NULL; /* unfudge the tail */
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return pHead;
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}
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|
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static apr_array_header_t *sort_hook(apr_array_header_t *pHooks,
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const char *szName)
|
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{
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apr_pool_t *p;
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383869 |
TSort *pSort;
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383869 |
apr_array_header_t *pNew;
|
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int n;
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|
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apr_pool_create(&p, apr_hook_global_pool);
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|
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pSort=prepare(p,(TSortData *)pHooks->elts,pHooks->nelts);
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|
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pSort=tsort(pSort,pHooks->nelts);
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|
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pNew=apr_array_make(apr_hook_global_pool,pHooks->nelts,sizeof(TSortData));
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if(apr_hook_debug_enabled)
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printf("Sorting %s:",szName);
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|
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for(n=0 ; pSort ; pSort=pSort->pNext,++n) {
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383869 |
TSortData *pHook;
|
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assert(n < pHooks->nelts);
|
|
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pHook=apr_array_push(pNew);
|
|
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memcpy(pHook,pSort->pData,sizeof *pHook);
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383869 |
if(apr_hook_debug_enabled)
|
|
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383869 |
printf(" %s",pHook->szName);
|
|
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383869 |
}
|
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if(apr_hook_debug_enabled)
|
|
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383869 |
fputc('\n',stdout);
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383869 |
|
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383869 |
/* destroy the pool - the sorted hooks were already copied */
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apr_pool_destroy(p);
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|
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return pNew;
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}
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383869 |
|
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383869 |
#ifndef NETWARE
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383869 |
static apr_array_header_t *s_aHooksToSort;
|
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Packit |
383869 |
#endif
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|
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383869 |
typedef struct
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{
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383869 |
const char *szHookName;
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383869 |
apr_array_header_t **paHooks;
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383869 |
} HookSortEntry;
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383869 |
|
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383869 |
APU_DECLARE(void) apr_hook_sort_register(const char *szHookName,
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383869 |
apr_array_header_t **paHooks)
|
|
Packit |
383869 |
{
|
|
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383869 |
#ifdef NETWARE
|
|
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get_apd
|
|
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383869 |
#endif
|
|
Packit |
383869 |
HookSortEntry *pEntry;
|
|
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383869 |
|
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383869 |
if(!s_aHooksToSort)
|
|
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s_aHooksToSort=apr_array_make(apr_hook_global_pool,1,sizeof(HookSortEntry));
|
|
Packit |
383869 |
pEntry=apr_array_push(s_aHooksToSort);
|
|
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383869 |
pEntry->szHookName=szHookName;
|
|
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383869 |
pEntry->paHooks=paHooks;
|
|
Packit |
383869 |
}
|
|
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383869 |
|
|
Packit |
383869 |
APU_DECLARE(void) apr_hook_sort_all(void)
|
|
Packit |
383869 |
{
|
|
Packit |
383869 |
#ifdef NETWARE
|
|
Packit |
383869 |
get_apd
|
|
Packit |
383869 |
#endif
|
|
Packit |
383869 |
int n;
|
|
Packit |
383869 |
|
|
Packit |
383869 |
if (!s_aHooksToSort) {
|
|
Packit |
383869 |
s_aHooksToSort = apr_array_make(apr_hook_global_pool, 1, sizeof(HookSortEntry));
|
|
Packit |
383869 |
}
|
|
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383869 |
|
|
Packit |
383869 |
for(n=0 ; n < s_aHooksToSort->nelts ; ++n) {
|
|
Packit |
383869 |
HookSortEntry *pEntry=&((HookSortEntry *)s_aHooksToSort->elts)[n];
|
|
Packit |
383869 |
*pEntry->paHooks=sort_hook(*pEntry->paHooks,pEntry->szHookName);
|
|
Packit |
383869 |
}
|
|
Packit |
383869 |
}
|
|
Packit |
383869 |
|
|
Packit |
383869 |
#ifndef NETWARE
|
|
Packit |
383869 |
static apr_hash_t *s_phOptionalHooks;
|
|
Packit |
383869 |
static apr_hash_t *s_phOptionalFunctions;
|
|
Packit |
383869 |
#endif
|
|
Packit |
383869 |
|
|
Packit |
383869 |
APU_DECLARE(void) apr_hook_deregister_all(void)
|
|
Packit |
383869 |
{
|
|
Packit |
383869 |
#ifdef NETWARE
|
|
Packit |
383869 |
get_apd
|
|
Packit |
383869 |
#endif
|
|
Packit |
383869 |
int n;
|
|
Packit |
383869 |
|
|
Packit |
383869 |
if (!s_aHooksToSort) {
|
|
Packit |
383869 |
return;
|
|
Packit |
383869 |
}
|
|
Packit |
383869 |
|
|
Packit |
383869 |
for(n=0 ; n < s_aHooksToSort->nelts ; ++n) {
|
|
Packit |
383869 |
HookSortEntry *pEntry=&((HookSortEntry *)s_aHooksToSort->elts)[n];
|
|
Packit |
383869 |
*pEntry->paHooks=NULL;
|
|
Packit |
383869 |
}
|
|
Packit |
383869 |
s_aHooksToSort=NULL;
|
|
Packit |
383869 |
s_phOptionalHooks=NULL;
|
|
Packit |
383869 |
s_phOptionalFunctions=NULL;
|
|
Packit |
383869 |
}
|
|
Packit |
383869 |
|
|
Packit |
383869 |
APU_DECLARE(void) apr_hook_debug_show(const char *szName,
|
|
Packit |
383869 |
const char * const *aszPre,
|
|
Packit |
383869 |
const char * const *aszSucc)
|
|
Packit |
383869 |
{
|
|
Packit |
383869 |
int nFirst;
|
|
Packit |
383869 |
|
|
Packit |
383869 |
printf(" Hooked %s",szName);
|
|
Packit |
383869 |
if(aszPre) {
|
|
Packit |
383869 |
fputs(" pre(",stdout);
|
|
Packit |
383869 |
nFirst=1;
|
|
Packit |
383869 |
while(*aszPre) {
|
|
Packit |
383869 |
if(!nFirst)
|
|
Packit |
383869 |
fputc(',',stdout);
|
|
Packit |
383869 |
nFirst=0;
|
|
Packit |
383869 |
fputs(*aszPre,stdout);
|
|
Packit |
383869 |
++aszPre;
|
|
Packit |
383869 |
}
|
|
Packit |
383869 |
fputc(')',stdout);
|
|
Packit |
383869 |
}
|
|
Packit |
383869 |
if(aszSucc) {
|
|
Packit |
383869 |
fputs(" succ(",stdout);
|
|
Packit |
383869 |
nFirst=1;
|
|
Packit |
383869 |
while(*aszSucc) {
|
|
Packit |
383869 |
if(!nFirst)
|
|
Packit |
383869 |
fputc(',',stdout);
|
|
Packit |
383869 |
nFirst=0;
|
|
Packit |
383869 |
fputs(*aszSucc,stdout);
|
|
Packit |
383869 |
++aszSucc;
|
|
Packit |
383869 |
}
|
|
Packit |
383869 |
fputc(')',stdout);
|
|
Packit |
383869 |
}
|
|
Packit |
383869 |
fputc('\n',stdout);
|
|
Packit |
383869 |
}
|
|
Packit |
383869 |
|
|
Packit |
383869 |
/* Optional hook support */
|
|
Packit |
383869 |
|
|
Packit |
383869 |
APR_DECLARE_EXTERNAL_HOOK(apr,APU,void,_optional,(void))
|
|
Packit |
383869 |
|
|
Packit |
383869 |
APU_DECLARE(apr_array_header_t *) apr_optional_hook_get(const char *szName)
|
|
Packit |
383869 |
{
|
|
Packit |
383869 |
#ifdef NETWARE
|
|
Packit |
383869 |
get_apd
|
|
Packit |
383869 |
#endif
|
|
Packit |
383869 |
apr_array_header_t **ppArray;
|
|
Packit |
383869 |
|
|
Packit |
383869 |
if(!s_phOptionalHooks)
|
|
Packit |
383869 |
return NULL;
|
|
Packit |
383869 |
ppArray=apr_hash_get(s_phOptionalHooks,szName,strlen(szName));
|
|
Packit |
383869 |
if(!ppArray)
|
|
Packit |
383869 |
return NULL;
|
|
Packit |
383869 |
return *ppArray;
|
|
Packit |
383869 |
}
|
|
Packit |
383869 |
|
|
Packit |
383869 |
APU_DECLARE(void) apr_optional_hook_add(const char *szName,void (*pfn)(void),
|
|
Packit |
383869 |
const char * const *aszPre,
|
|
Packit |
383869 |
const char * const *aszSucc,int nOrder)
|
|
Packit |
383869 |
{
|
|
Packit |
383869 |
#ifdef NETWARE
|
|
Packit |
383869 |
get_apd
|
|
Packit |
383869 |
#endif
|
|
Packit |
383869 |
apr_array_header_t *pArray=apr_optional_hook_get(szName);
|
|
Packit |
383869 |
apr_LINK__optional_t *pHook;
|
|
Packit |
383869 |
|
|
Packit |
383869 |
if(!pArray) {
|
|
Packit |
383869 |
apr_array_header_t **ppArray;
|
|
Packit |
383869 |
|
|
Packit |
383869 |
pArray=apr_array_make(apr_hook_global_pool,1,
|
|
Packit |
383869 |
sizeof(apr_LINK__optional_t));
|
|
Packit |
383869 |
if(!s_phOptionalHooks)
|
|
Packit |
383869 |
s_phOptionalHooks=apr_hash_make(apr_hook_global_pool);
|
|
Packit |
383869 |
ppArray=apr_palloc(apr_hook_global_pool,sizeof *ppArray);
|
|
Packit |
383869 |
*ppArray=pArray;
|
|
Packit |
383869 |
apr_hash_set(s_phOptionalHooks,szName,strlen(szName),ppArray);
|
|
Packit |
383869 |
apr_hook_sort_register(szName,ppArray);
|
|
Packit |
383869 |
}
|
|
Packit |
383869 |
pHook=apr_array_push(pArray);
|
|
Packit |
383869 |
pHook->pFunc=pfn;
|
|
Packit |
383869 |
pHook->aszPredecessors=aszPre;
|
|
Packit |
383869 |
pHook->aszSuccessors=aszSucc;
|
|
Packit |
383869 |
pHook->nOrder=nOrder;
|
|
Packit |
383869 |
pHook->szName=apr_hook_debug_current;
|
|
Packit |
383869 |
if(apr_hook_debug_enabled)
|
|
Packit |
383869 |
apr_hook_debug_show(szName,aszPre,aszSucc);
|
|
Packit |
383869 |
}
|
|
Packit |
383869 |
|
|
Packit |
383869 |
/* optional function support */
|
|
Packit |
383869 |
|
|
Packit |
383869 |
APU_DECLARE(apr_opt_fn_t *) apr_dynamic_fn_retrieve(const char *szName)
|
|
Packit |
383869 |
{
|
|
Packit |
383869 |
#ifdef NETWARE
|
|
Packit |
383869 |
get_apd
|
|
Packit |
383869 |
#endif
|
|
Packit |
383869 |
if(!s_phOptionalFunctions)
|
|
Packit |
383869 |
return NULL;
|
|
Packit |
383869 |
return (void(*)(void))apr_hash_get(s_phOptionalFunctions,szName,strlen(szName));
|
|
Packit |
383869 |
}
|
|
Packit |
383869 |
|
|
Packit |
383869 |
/* Deprecated */
|
|
Packit |
383869 |
APU_DECLARE_NONSTD(void) apr_dynamic_fn_register(const char *szName,
|
|
Packit |
383869 |
apr_opt_fn_t *pfn)
|
|
Packit |
383869 |
{
|
|
Packit |
383869 |
#ifdef NETWARE
|
|
Packit |
383869 |
get_apd
|
|
Packit |
383869 |
#endif
|
|
Packit |
383869 |
if(!s_phOptionalFunctions)
|
|
Packit |
383869 |
s_phOptionalFunctions=apr_hash_make(apr_hook_global_pool);
|
|
Packit |
383869 |
apr_hash_set(s_phOptionalFunctions,szName,strlen(szName),(void *)pfn);
|
|
Packit |
383869 |
}
|
|
Packit |
383869 |
|
|
Packit |
383869 |
#if 0
|
|
Packit |
383869 |
void main()
|
|
Packit |
383869 |
{
|
|
Packit |
383869 |
const char *aszAPre[]={"b","c",NULL};
|
|
Packit |
383869 |
const char *aszBPost[]={"a",NULL};
|
|
Packit |
383869 |
const char *aszCPost[]={"b",NULL};
|
|
Packit |
383869 |
TSortData t1[]=
|
|
Packit |
383869 |
{
|
|
Packit |
383869 |
{ "a",aszAPre,NULL },
|
|
Packit |
383869 |
{ "b",NULL,aszBPost },
|
|
Packit |
383869 |
{ "c",NULL,aszCPost }
|
|
Packit |
383869 |
};
|
|
Packit |
383869 |
TSort *pResult;
|
|
Packit |
383869 |
|
|
Packit |
383869 |
pResult=prepare(t1,3);
|
|
Packit |
383869 |
pResult=tsort(pResult,3);
|
|
Packit |
383869 |
|
|
Packit |
383869 |
for( ; pResult ; pResult=pResult->pNext)
|
|
Packit |
383869 |
printf("%s\n",pResult->pData->szName);
|
|
Packit |
383869 |
}
|
|
Packit |
383869 |
#endif
|