gecko-dev/netwerk/cache/nsCache.cpp
2012-05-21 12:12:37 +01:00

118 lines
2.7 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#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;
}