gecko-dev/netwerk/cache/nsCache.cpp
2011-10-17 10:59:28 -04:00

154 lines
4.3 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 nsCache.cpp, released
* March 18, 2001.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Gordon Sheridan <gordon@netscape.com>
* Patrick C. Beard <beard@netscape.com>
* Darin Fisher <darin@netscape.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 MPL, 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 MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsCache.h"
#include "nsReadableUtils.h"
#include "nsDependentSubstring.h"
#include "nsString.h"
/**
* Cache Service Utility Functions
*/
#if defined(PR_LOGGING)
PRLogModuleInfo * gCacheLog = nsnull;
void
CacheLogInit()
{
if (gCacheLog) return;
gCacheLog = PR_NewLogModule("cache");
NS_ASSERTION(gCacheLog, "\nfailed to allocate cache log.\n");
}
void
CacheLogPrintPath(PRLogModuleLevel level, const char * format, nsIFile * item)
{
nsCAutoString path;
nsresult rv = item->GetNativePath(path);
if (NS_SUCCEEDED(rv)) {
PR_LOG(gCacheLog, level, (format, path.get()));
} else {
PR_LOG(gCacheLog, level, ("GetNativePath failed: %x", rv));
}
}
#endif
PRUint32
SecondsFromPRTime(PRTime prTime)
{
PRInt64 microSecondsPerSecond, intermediateResult;
PRUint32 seconds;
LL_I2L(microSecondsPerSecond, PR_USEC_PER_SEC);
LL_DIV(intermediateResult, prTime, microSecondsPerSecond);
LL_L2UI(seconds, intermediateResult);
return seconds;
}
PRTime
PRTimeFromSeconds(PRUint32 seconds)
{
PRInt64 microSecondsPerSecond, intermediateResult;
PRTime prTime;
LL_I2L(microSecondsPerSecond, PR_USEC_PER_SEC);
LL_UI2L(intermediateResult, seconds);
LL_MUL(prTime, intermediateResult, microSecondsPerSecond);
return prTime;
}
nsresult
ClientIDFromCacheKey(const nsACString& key, char ** result)
{
nsresult rv = NS_OK;
*result = nsnull;
nsReadingIterator<char> colon;
key.BeginReading(colon);
nsReadingIterator<char> start;
key.BeginReading(start);
nsReadingIterator<char> end;
key.EndReading(end);
if (FindCharInReadable(':', colon, end)) {
*result = ToNewCString( Substring(start, colon));
if (!*result) rv = NS_ERROR_OUT_OF_MEMORY;
} else {
NS_ASSERTION(false, "FindCharInRead failed to find ':'");
rv = NS_ERROR_UNEXPECTED;
}
return rv;
}
nsresult
ClientKeyFromCacheKey(const nsCString& key, nsACString &result)
{
nsresult rv = NS_OK;
nsReadingIterator<char> start;
key.BeginReading(start);
nsReadingIterator<char> end;
key.EndReading(end);
if (FindCharInReadable(':', start, end)) {
++start; // advance past clientID ':' delimiter
result.Assign(Substring(start, end));
} else {
NS_ASSERTION(false, "FindCharInRead failed to find ':'");
rv = NS_ERROR_UNEXPECTED;
result.Truncate(0);
}
return rv;
}