netwerk/cache/nsCache.cpp
author Ryan VanderMeulen <ryanvm@gmail.com>
Tue, 28 Oct 2014 12:57:31 -0400
changeset 237027 d94624ae1684444cd777aa7ff9beae75871fe948
parent 119398 5fb440887096d1c497b2a15adeebe2a20a15f229
child 272691 0170a6c2a5bebc37e2ca4c92110dbad6784fbc57
permissions -rw-r--r--
Backed out changesets 262df50c7355 and 2dbd41ba7717 (bug 1088617) for crashes.

/* -*- 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 = nullptr;


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)
{
    nsAutoCString 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


uint32_t
SecondsFromPRTime(PRTime prTime)
{
  int64_t  microSecondsPerSecond = PR_USEC_PER_SEC;
  return uint32_t(prTime / microSecondsPerSecond);
}


PRTime
PRTimeFromSeconds(uint32_t seconds)
{
  int64_t intermediateResult = seconds;
  PRTime prTime = intermediateResult * PR_USEC_PER_SEC;
  return prTime;
}


nsresult
ClientIDFromCacheKey(const nsACString&  key, char ** result)
{
    nsresult  rv = NS_OK;
    *result = nullptr;

    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;
}