зеркало из https://github.com/mozilla/gecko-dev.git
269 строки
8.5 KiB
C
269 строки
8.5 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef EXT_CACHE_H
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#define EXT_CACHE_H
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#ifndef EXT_DB_ROUTINES
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#include "mcom_db.h"
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#endif
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#ifdef EXT_DB_ROUTINES
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#define PRBool char
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#define uint32 unsigned int
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#define int32 int
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#define PR_NEW(structure) ((structure *) malloc(sizeof(structure)))
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#define PR_Malloc (void *) malloc
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#define memcpy memcpy
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#define memset memset
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#define TRACEMSG(x) printf x
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#define FREEIF(x) do { if(x) free(x); } while(0)
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#define FREE free
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#define PL_strlen strlen
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#define PL_strchr strchr
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#define PL_strcmp strcmp
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#define PR_ASSERT assert
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#define MODULE_PRIVATE
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#define PRIVATE static
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#define TRUE !0
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#define FALSE 0
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#include <stdio.h>
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#include <string.h>
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#include <db.h>
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#endif
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#ifndef EXT_DB_ROUTINES
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#include "prtypes.h" /* for IS_LITTLE_ENDIAN / IS_BIG_ENDIAN */
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#endif /* EXT_DB_ROUTINES */
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#if !defined(IS_LITTLE_ENDIAN) && !defined(IS_BIG_ENDIAN)
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ERROR! Must have a byte order
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#endif
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#ifdef IS_LITTLE_ENDIAN
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#define COPY_INT32(_a,_b) memcpy(_a, _b, sizeof(int32));
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#else
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#define COPY_INT32(_a,_b) /* swap */ \
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do { \
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((char *)(_a))[0] = ((char *)(_b))[3]; \
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((char *)(_a))[1] = ((char *)(_b))[2]; \
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((char *)(_a))[2] = ((char *)(_b))[1]; \
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((char *)(_a))[3] = ((char *)(_b))[0]; \
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} while(0)
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#endif
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#define EXT_CACHE_NAME_STRING "INT_ExternalCacheNameString"
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/* Internal WARNING!! Some slots of this structure
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* are shared with URL_Struct and
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* History_entry. If you add a slot, decide whether it needs to be shared
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* as well.
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*/
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typedef struct _net_CacheObject {
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time_t last_modified;
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time_t last_accessed;
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time_t expires;
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PRBool is_netsite;
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uint32 content_length;
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char * filename; /* cache file name */
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int32 filename_len; /* optimization */
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PRBool is_relative_path; /* is the path relative? */
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/* Security information */
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int32 security_on; /* is security on? */
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unsigned char *sec_info;
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time_t lock_date; /* the file is locked if this
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* is non-zero. The date
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* represents the time the
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* lock was put in place.
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* Locks are only valid for
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* one session
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*/
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int32 method;
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char * address;
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uint32 post_data_size;
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char * post_data;
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char * post_headers;
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char * content_type;
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char * content_encoding;
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char * charset;
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PRBool incomplete_file; /* means that the whole
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* file is not there.
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* This can only be true
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* if the server supports byteranges
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*/
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uint32 real_content_length; /* the whole content length
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* i.e. the server size of a truncated
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* client file
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*/
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char * page_services_url;
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char * etag; /* HTTP/1.1 Etag */
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} net_CacheObject;
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/* this is the version number of the cache database entry.
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* It should be incremented in integer ingrements up
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* to MAXINT32
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*/
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#define CACHE_FORMAT_VERSION 5
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/* these defines specify the exact byte position
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* of the first 4 elements in the DBT data struct
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* Change these if you change the order of entry into
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* the DBT
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*/
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#define LAST_MODIFIED_BYTE_POSITION \
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sizeof(int32)+sizeof(int32)
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#define LAST_ACCESSED_BYTE_POSITION \
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sizeof(int32)+sizeof(int32)+sizeof(time_t)
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#define EXPIRES_BYTE_POSITION \
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sizeof(int32)+sizeof(int32)+sizeof(time_t)+sizeof(time_t)
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#define CONTENT_LENGTH_BYTE_POSITION \
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sizeof(int32)+sizeof(int32)+sizeof(time_t)+sizeof(time_t) \
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+sizeof(time_t)
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#define IS_NETSITE_BYTE_POSITION \
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sizeof(int32)+sizeof(int32)+sizeof(time_t)+sizeof(time_t) \
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+sizeof(time_t)+sizeof(int32)
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#define LOCK_DATE_BYTE_POSITION \
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sizeof(int32)+sizeof(int32)+sizeof(time_t)+sizeof(time_t) \
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+sizeof(time_t)+sizeof(int32)+sizeof(char)
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#define FILENAME_SIZE_BYTE_POSITION \
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sizeof(int32)+sizeof(int32)+sizeof(time_t)+sizeof(time_t) \
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+sizeof(time_t)+sizeof(uint32)+sizeof(char)+sizeof(time_t)
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#define FILENAME_BYTE_POSITION \
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sizeof(int32)+sizeof(int32)+sizeof(time_t)+sizeof(time_t) \
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+sizeof(time_t)+sizeof(uint32)+sizeof(char)+sizeof(time_t) \
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+sizeof(int32)
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/* generates a key for use in the cache database
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* from a CacheObject struct
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*
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* Key is based on the address and the post_data
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*/
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extern DBT *
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net_GenCacheDBKey(char *address, char *post_data, int32 post_data_size);
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/* returns a static string that contains the
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* URL->address of the key
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*
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* returns NULL on error
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*/
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extern char *
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net_GetAddressFromCacheKey(DBT *key);
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/* allocs and copies a new DBT from an existing DBT
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*/
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extern DBT * net_CacheDBTDup(DBT *obj);
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/* free the cache object
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*/
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extern void net_freeCacheObj (net_CacheObject * cache_obj);
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/* takes a cache object and returns a malloc'd
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* (void *) suitible for passing in as a database
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* data storage object
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*/
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extern DBT * net_CacheStructToDBData(net_CacheObject * old_obj);
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/* takes a database storage object and returns a malloc'd
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* cache data object. The cache object needs all of
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* it's parts free'd.
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*
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* returns NULL on parse error
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*/
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extern net_CacheObject * net_DBDataToCacheStruct(DBT * db_obj);
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/* checks a date within a DBT struct so
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* that we don't have to convert it into a CacheObject
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*
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* This works because of the fixed length record format
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* of the first part of the specific DBT format I'm
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* using
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*
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* returns 0 on error
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*/
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extern time_t net_GetTimeInCacheDBT(DBT *data, int byte_position);
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/* Sets a date within a DBT struct so
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* that we don't have to convert it into a CacheObject
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*
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* This works because of the fixed length record format
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* of the first part of the specific DBT format I'm
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* using
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*
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* returns 0 on error
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*/
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extern void net_SetTimeInCacheDBT(DBT *data, int byte_position, time_t date);
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/* Gets the filename within a cache DBT struct so
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* that we don't have to convert it into a CacheObject
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*
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* This works because of the fixed length record format
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* of the first part of the specific DBT format I'm
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* using
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*
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* returns NULL on error
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*/
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extern char * net_GetFilenameInCacheDBT(DBT *data);
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/* Gets a int32 within a DBT struct so
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* that we don't have to convert it into a CacheObject
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*
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* This works because of the fixed length record format
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* of the first part of the specific DBT format I'm
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* using
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*
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* returns 0 on error
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*/
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extern time_t net_GetInt32InCacheDBT(DBT *data, int byte_position);
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/* free's a DBT struct
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*/
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extern void net_FreeCacheDBTdata(DBT *stuff);
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/* stores a cache object in the DBM database
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*/
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extern void net_ExtCacheStore(DB *database, net_CacheObject * obj);
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/* takes a database storage object and returns an un-malloc'd
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* cache data object. The structure returned has pointers
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* directly into the database memory and are only valid
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* until the next call to any database function
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*
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* do not free anything returned by this structure
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*/
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extern net_CacheObject * net_Fast_DBDataToCacheStruct(DBT *obj);
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/* returns true if this DBT looks like a valid
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* entry. It looks at the checksum and the
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* version number to see if it's valid
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*/
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extern PRBool net_IsValidCacheDBT(DBT *obj);
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#endif /* EXT_CACHE_H */
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