gecko-dev/gfx/public/nsNameValuePairDB.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Brian Stell <bstell@ix.netcom.com>
*
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef NSNAMEVALUEPAIRDB_H
#define NSNAMEVALUEPAIRDB_H
#include "nsString.h"
#define FC_BUF_LEN 1024
#define NVPDB_MIN_BUFLEN 100
//
// Errors
//
#define NVPDB_END_OF_FILE 0
#define NVPDB_BUFFER_TOO_SMALL -1
#define NVPDB_END_OF_GROUP -2
#define NVPDB_FILE_IO_ERROR -3
#define NVPDB_GARBLED_LINE -4
class nsNameValuePairDB {
public:
nsNameValuePairDB();
~nsNameValuePairDB();
inline PRBool HadError() { return mError; };
// implement this to re-read an element if it is larger than the buffer
// PRInt32 GetCurrentElement(const char** aName, const char** aValue,
// char *aBuffer, PRUint32 aBufferLen);
PRBool GetNextGroup(const char** aType);
PRBool GetNextGroup(const char** aType, const char* aName);
PRBool GetNextGroup(const char** aType, const char* aName, int aLen);
PRInt32 GetNextElement(const char** aName, const char** aValue);
PRInt32 GetNextElement(const char** aName, const char** aValue,
char *aBuffer, PRUint32 aBufferLen);
PRBool OpenForRead(const nsACString& aCatalogName);
PRBool OpenTmpForWrite(const nsACString& aCatalogName);
PRBool PutElement(const char* aName, const char* aValue);
PRBool PutEndGroup(const char* aType);
PRBool PutStartGroup(const char* aType);
PRBool RenameTmp(const char* aCatalogName);
protected:
PRBool CheckHeader();
PRUint16 mMajorNum;
PRUint16 mMinorNum;
PRUint16 mMaintenanceNum;
FILE* mFile;
char mBuf[FC_BUF_LEN];
PRInt32 mCurrentGroup;
PRPackedBool mAtEndOfGroup;
PRPackedBool mAtEndOfCatalog;
PRPackedBool mError;
private:
};
#endif /* NSNAMEVALUEPAIRDB_H */