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76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (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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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is nsCacheDevice.h, released
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* March 9, 2001.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2001
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Patrick Beard <beard@netscape.com>
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* Gordon Sheridan <gordon@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef _nsDiskCache_h_
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#define _nsDiskCache_h_
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#include "nsCacheEntry.h"
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#ifdef XP_WIN
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#include <winsock.h> // for htonl/ntohl
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#endif
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class nsDiskCache {
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public:
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enum {
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kCurrentVersion = 0x0001000D // format = 16 bits major version/16 bits minor version
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};
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enum { kData, kMetaData };
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// Parameter initval initializes internal state of hash function. Hash values are different
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// for the same text when different initval is used. It can be any random number.
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//
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// It can be used for generating 64-bit hash value:
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// (PRUint64(Hash(key, initval1)) << 32) | Hash(key, initval2)
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//
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// It can be also used to hash multiple strings:
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// h = Hash(string1, 0);
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// h = Hash(string2, h);
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// ...
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static PLDHashNumber Hash(const char* key, PLDHashNumber initval=0);
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static nsresult Truncate(PRFileDesc * fd, PRUint32 newEOF);
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};
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#endif // _nsDiskCache_h_
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