C++ nsACString类代码示例

/* static */
bool
VorbisDataDecoder::IsVorbis(const nsACString& aMimeType)
{
  return aMimeType.EqualsLiteral("audio/vorbis");
}

NS_IMETHODIMP nsMsgMaildirStore::GetStoreType(nsACString& aType)
{
  aType.AssignLiteral("maildir");
  return NS_OK;
}

nsresult
net_ParseFileURL(const nsACString &inURL,
                 nsACString &outDirectory,
                 nsACString &outFileBaseName,
                 nsACString &outFileExtension)
{
    nsresult rv;

    outDirectory.Truncate();
    outFileBaseName.Truncate();
    outFileExtension.Truncate();

    const nsPromiseFlatCString &flatURL = PromiseFlatCString(inURL);
    const char *url = flatURL.get();
    
    uint32_t schemeBeg, schemeEnd;
    rv = net_ExtractURLScheme(flatURL, &schemeBeg, &schemeEnd, nullptr);
    if (NS_FAILED(rv)) return rv;

    if (strncmp(url + schemeBeg, "file", schemeEnd - schemeBeg) != 0) {
        NS_ERROR("must be a file:// url");
        return NS_ERROR_UNEXPECTED;
    }

    nsIURLParser *parser = net_GetNoAuthURLParser();
    NS_ENSURE_TRUE(parser, NS_ERROR_UNEXPECTED);

    uint32_t pathPos, filepathPos, directoryPos, basenamePos, extensionPos;
    int32_t pathLen, filepathLen, directoryLen, basenameLen, extensionLen;

    // invoke the parser to extract the URL path
    rv = parser->ParseURL(url, flatURL.Length(),
                          nullptr, nullptr, // don't care about scheme
                          nullptr, nullptr, // don't care about authority
                          &pathPos, &pathLen);
    if (NS_FAILED(rv)) return rv;

    // invoke the parser to extract filepath from the path
    rv = parser->ParsePath(url + pathPos, pathLen,
                           &filepathPos, &filepathLen,
                           nullptr, nullptr,  // don't care about query
                           nullptr, nullptr); // don't care about ref
    if (NS_FAILED(rv)) return rv;

    filepathPos += pathPos;

    // invoke the parser to extract the directory and filename from filepath
    rv = parser->ParseFilePath(url + filepathPos, filepathLen,
                               &directoryPos, &directoryLen,
                               &basenamePos, &basenameLen,
                               &extensionPos, &extensionLen);
    if (NS_FAILED(rv)) return rv;

    if (directoryLen > 0)
        outDirectory = Substring(inURL, filepathPos + directoryPos, directoryLen);
    if (basenameLen > 0)
        outFileBaseName = Substring(inURL, filepathPos + basenamePos, basenameLen);
    if (extensionLen > 0)
        outFileExtension = Substring(inURL, filepathPos + extensionPos, extensionLen);
    // since we are using a no-auth url parser, there will never be a host
    // XXX not strictly true... file://localhost/foo/bar.html is a valid URL

    return NS_OK;
}

NS_IMETHODIMP
csTpMessagePart::GetKey(nsACString &aKey)
{
  aKey.Assign(m_Key);
  return NS_OK;
}

NS_IMETHODIMP
nsMIMEInfoAndroid::GetMIMEType(nsACString & aMIMEType)
{
  aMIMEType.Assign(mType);
  return NS_OK;
}

NS_IMETHODIMP
nsDSURIContentListener::DoContent(const nsACString& aContentType,
                                  bool aIsContentPreferred,
                                  nsIRequest* aRequest,
                                  nsIStreamListener** aContentHandler,
                                  bool* aAbortProcess)
{
  nsresult rv;
  NS_ENSURE_ARG_POINTER(aContentHandler);
  NS_ENSURE_TRUE(mDocShell, NS_ERROR_FAILURE);

  // Check whether X-Frame-Options permits us to load this content in an
  // iframe and abort the load (unless we've disabled x-frame-options
  // checking).
  if (!CheckFrameOptions(aRequest)) {
    *aAbortProcess = true;
    return NS_OK;
  }

  *aAbortProcess = false;

  // determine if the channel has just been retargeted to us...
  nsLoadFlags loadFlags = 0;
  nsCOMPtr<nsIChannel> aOpenedChannel = do_QueryInterface(aRequest);

  if (aOpenedChannel) {
    aOpenedChannel->GetLoadFlags(&loadFlags);
  }

  if (loadFlags & nsIChannel::LOAD_RETARGETED_DOCUMENT_URI) {
    // XXX: Why does this not stop the content too?
    mDocShell->Stop(nsIWebNavigation::STOP_NETWORK);

    mDocShell->SetLoadType(aIsContentPreferred ? LOAD_LINK : LOAD_NORMAL);
  }

  // In case of multipart jpeg request (mjpeg) we don't really want to
  // create new viewer since the one we already have is capable of
  // rendering multipart jpeg correctly (see bug 625012)
  nsCOMPtr<nsIChannel> baseChannel;
  if (nsCOMPtr<nsIMultiPartChannel> mpchan = do_QueryInterface(aRequest)) {
    mpchan->GetBaseChannel(getter_AddRefs(baseChannel));
  }

  bool reuseCV = baseChannel && baseChannel == mExistingJPEGRequest &&
                 aContentType.EqualsLiteral("image/jpeg");

  if (mExistingJPEGStreamListener && reuseCV) {
    RefPtr<nsIStreamListener> copy(mExistingJPEGStreamListener);
    copy.forget(aContentHandler);
    rv = NS_OK;
  } else {
    rv = mDocShell->CreateContentViewer(aContentType, aRequest, aContentHandler);
    if (NS_SUCCEEDED(rv) && reuseCV) {
      mExistingJPEGStreamListener = *aContentHandler;
    } else {
      mExistingJPEGStreamListener = nullptr;
    }
    mExistingJPEGRequest = baseChannel;
  }

  if (rv == NS_ERROR_REMOTE_XUL) {
    aRequest->Cancel(rv);
    *aAbortProcess = true;
    return NS_OK;
  }

  if (NS_FAILED(rv)) {
    // we don't know how to handle the content
    *aContentHandler = nullptr;
    return rv;
  }

  if (loadFlags & nsIChannel::LOAD_RETARGETED_DOCUMENT_URI) {
    nsCOMPtr<nsPIDOMWindowOuter> domWindow =
      mDocShell ? mDocShell->GetWindow() : nullptr;
    NS_ENSURE_TRUE(domWindow, NS_ERROR_FAILURE);
    domWindow->Focus();
  }

  return NS_OK;
}

NS_IMETHODIMP
nsResProtocolHandler::GetScheme(nsACString &result)
{
    result.AssignLiteral("resource");
    return NS_OK;
}

NS_IMETHODIMP
nsBlobProtocolHandler::GetScheme(nsACString &result)
{
  result.AssignLiteral(BLOBURI_SCHEME);
  return NS_OK;
}

NS_IMETHODIMP
sbLocalDatabaseLibraryFactory::GetContractID(nsACString& aContractID)
{
  aContractID.AssignLiteral(SB_LOCALDATABASE_LIBRARYFACTORY_CONTRACTID);
  return NS_OK;
}

 NS_IMETHOD
 GetName(nsACString& aName) override
 {
   aName.AssignLiteral("ReleasingTimerHolder");
   return NS_OK;
 }

NS_IMETHODIMP
NullHttpChannel::GetResponseHeader(const nsACString & header, nsACString & _retval)
{
  _retval.Truncate();
  return NS_ERROR_NOT_IMPLEMENTED;
}

// Parse a distinguished name (DN) and returns the relative DN,
// base DN and the list of attributes that make up the relative DN.
NS_IMETHODIMP nsLDAPService::ParseDn(const char *aDn,
                                   nsACString &aRdn,
                                   nsACString &aBaseDn,
                                   uint32_t *aRdnCount,
                                   char ***aRdnAttrs)
{
    NS_ENSURE_ARG_POINTER(aRdnCount);
    NS_ENSURE_ARG_POINTER(aRdnAttrs);

    // explode the DN
    char **dnComponents = ldap_explode_dn(aDn, 0);
    if (!dnComponents) {
        NS_ERROR("nsLDAPService::ParseDn: parsing DN failed");
        return NS_ERROR_UNEXPECTED;
    }

    // count DN components
    if (!*dnComponents || !*(dnComponents + 1)) {
        NS_ERROR("nsLDAPService::ParseDn: DN has too few components");
        ldap_value_free(dnComponents);
        return NS_ERROR_UNEXPECTED;
    }

    // get the base DN
    nsAutoCString baseDn(nsDependentCString(*(dnComponents + 1)));
    for (char **component = dnComponents + 2; *component; ++component) {
        baseDn.AppendLiteral(",");
        baseDn.Append(nsDependentCString(*component));
    }

    // explode the RDN
    char **rdnComponents = ldap_explode_rdn(*dnComponents, 0);
    if (!rdnComponents) {
        NS_ERROR("nsLDAPService::ParseDn: parsing RDN failed");
        ldap_value_free(dnComponents);
        return NS_ERROR_UNEXPECTED;
    }

    // count RDN attributes
    uint32_t rdnCount = 0;
    for (char **component = rdnComponents; *component; ++component)
        ++rdnCount;
    if (rdnCount < 1) {
        NS_ERROR("nsLDAPService::ParseDn: RDN has too few components");
        ldap_value_free(dnComponents);
        ldap_value_free(rdnComponents);
        return NS_ERROR_UNEXPECTED;
    }
  
    // get the RDN attribute names
    char **attrNameArray = static_cast<char **>(
        nsMemory::Alloc(rdnCount * sizeof(char *)));
    if (!attrNameArray) {
        NS_ERROR("nsLDAPService::ParseDn: out of memory ");
        ldap_value_free(dnComponents);
        ldap_value_free(rdnComponents);
        return NS_ERROR_OUT_OF_MEMORY;
    }
    uint32_t index = 0;
    for (char **component = rdnComponents; *component; ++component) {
        uint32_t len = 0;
        char *p;
        for (p = *component; *p != '\0' && *p != '='; ++p)
            ++len;
        if (*p != '=') {
            NS_ERROR("nsLDAPService::parseDn: "
                "could not find '=' in RDN component");
            ldap_value_free(dnComponents);
            ldap_value_free(rdnComponents);
            return NS_ERROR_UNEXPECTED;
        }
        if (!(attrNameArray[index] = (char*)NS_Alloc(len + 1))) {
            NS_ERROR("nsLDAPService::ParseDn: out of memory ");
            ldap_value_free(dnComponents);
            ldap_value_free(rdnComponents);
            NS_FREE_XPCOM_ALLOCATED_POINTER_ARRAY(index, attrNameArray);
            return NS_ERROR_OUT_OF_MEMORY;
        }
        memcpy(attrNameArray[index], *component, len);
        *(attrNameArray[index] + len) = '\0';
        ++index;
    }

    // perform assignments
    aRdn.Assign(*dnComponents);
    aBaseDn.Assign(baseDn);
    *aRdnCount = rdnCount;
    *aRdnAttrs = attrNameArray;

    ldap_value_free(dnComponents);
    ldap_value_free(rdnComponents);
    return NS_OK;
}

/* AString createFilter (in unsigned long aMaxSize, in AString aPattern, in AString aPrefix, in AString aSuffix, in AString aAttr, in AString aValue); */
NS_IMETHODIMP nsLDAPService::CreateFilter(uint32_t aMaxSize, 
                                          const nsACString & aPattern,
                                          const nsACString & aPrefix,
                                          const nsACString & aSuffix,
                                          const nsACString & aAttr,
                                          const nsACString & aValue,
                                          nsACString & _retval)
{
    if (!aMaxSize) {
        return NS_ERROR_INVALID_ARG;
    }

    // figure out how big of an array we're going to need for the tokens,
    // including a trailing NULL, and allocate space for it.
    //
    const char *iter = aValue.BeginReading();
    const char *iterEnd = aValue.EndReading();
    uint32_t numTokens = CountTokens(iter, iterEnd); 
    char **valueWords;
    valueWords = static_cast<char **>(nsMemory::Alloc((numTokens + 1) *
                                                sizeof(char *)));
    if (!valueWords) {
        return NS_ERROR_OUT_OF_MEMORY;
    }

    // build the array of values
    //
    uint32_t curToken = 0;
    while (iter != iterEnd && curToken < numTokens ) {
        valueWords[curToken] = NextToken(&iter, &iterEnd);
        if ( !valueWords[curToken] ) {
            NS_FREE_XPCOM_ALLOCATED_POINTER_ARRAY(curToken, valueWords);
            return NS_ERROR_OUT_OF_MEMORY;
        }
        curToken++;
    }
    valueWords[numTokens] = 0;  // end of array signal to LDAP C SDK

    // make buffer to be used for construction 
    //
    char *buffer = static_cast<char *>(nsMemory::Alloc(aMaxSize * sizeof(char)));
    if (!buffer) {
        NS_FREE_XPCOM_ALLOCATED_POINTER_ARRAY(numTokens, valueWords);
        return NS_ERROR_OUT_OF_MEMORY;
    }

    // create the filter itself
    //
    nsresult rv;
    int result = ldap_create_filter(buffer, aMaxSize, 
                   const_cast<char *>(PromiseFlatCString(aPattern).get()),
                   const_cast<char *>(PromiseFlatCString(aPrefix).get()),
                   const_cast<char *>(PromiseFlatCString(aSuffix).get()),
                   const_cast<char *>(PromiseFlatCString(aAttr).get()),
                   const_cast<char *>(PromiseFlatCString(aValue).get()),
                   valueWords);
    switch (result) {
    case LDAP_SUCCESS:
        rv = NS_OK;
        break;

    case LDAP_SIZELIMIT_EXCEEDED:
        PR_LOG(gLDAPLogModule, PR_LOG_DEBUG, 
                   ("nsLDAPService::CreateFilter(): "
                    "filter longer than max size of %d generated", 
                    aMaxSize));
        rv = NS_ERROR_NOT_AVAILABLE;
        break;

    case LDAP_PARAM_ERROR:
        rv = NS_ERROR_INVALID_ARG;
        break;

    default:
        NS_ERROR("nsLDAPService::CreateFilter(): ldap_create_filter() "
                 "returned unexpected error");
        rv = NS_ERROR_UNEXPECTED;
        break;
    }

    _retval.Assign(buffer);

    // done with the array and the buffer
    //
    NS_FREE_XPCOM_ALLOCATED_POINTER_ARRAY(numTokens, valueWords);
    nsMemory::Free(buffer);

    return rv;
}

/**
 *  Allocates a C string into that contains a ISO 639 language list
 *  notated with HTTP "q" values for output with a HTTP Accept-Language
 *  header. Previous q values will be stripped because the order of
 *  the langs imply the q value. The q values are calculated by dividing
 *  1.0 amongst the number of languages present.
 *
 *  Ex: passing: "en, ja"
 *      returns: "en,ja;q=0.5"
 *
 *      passing: "en, ja, fr_CA"
 *      returns: "en,ja;q=0.7,fr_CA;q=0.3"
 */
static nsresult
PrepareAcceptLanguages(const char *i_AcceptLanguages, nsACString &o_AcceptLanguages)
{
    if (!i_AcceptLanguages)
        return NS_OK;

    PRUint32 n, size, wrote;
    double q, dec;
    char *p, *p2, *token, *q_Accept, *o_Accept;
    const char *comma;
    PRInt32 available;

    o_Accept = nsCRT::strdup(i_AcceptLanguages);
    if (!o_Accept)
        return NS_ERROR_OUT_OF_MEMORY;
    for (p = o_Accept, n = size = 0; '\0' != *p; p++) {
        if (*p == ',') n++;
            size++;
    }

    available = size + ++n * 11 + 1;
    q_Accept = new char[available];
    if (!q_Accept) {
        nsCRT::free(o_Accept);
        return NS_ERROR_OUT_OF_MEMORY;
    }
    *q_Accept = '\0';
    q = 1.0;
    dec = q / (double) n;
    n = 0;
    p2 = q_Accept;
    for (token = nsCRT::strtok(o_Accept, ",", &p);
         token != (char *) 0;
         token = nsCRT::strtok(p, ",", &p))
    {
        token = net_FindCharNotInSet(token, HTTP_LWS);
        char* trim;
        trim = net_FindCharInSet(token, ";" HTTP_LWS);
        if (trim != (char*)0)  // remove "; q=..." if present
            *trim = '\0';

        if (*token != '\0') {
            comma = n++ != 0 ? "," : ""; // delimiter if not first item
            PRUint32 u = QVAL_TO_UINT(q);
            if (u < 10)
                wrote = PR_snprintf(p2, available, "%s%s;q=0.%u", comma, token, u);
            else
                wrote = PR_snprintf(p2, available, "%s%s", comma, token);
            q -= dec;
            p2 += wrote;
            available -= wrote;
            NS_ASSERTION(available > 0, "allocated string not long enough");
        }
    }
    nsCRT::free(o_Accept);

    o_AcceptLanguages.Assign((const char *) q_Accept);
    delete [] q_Accept;

    return NS_OK;
}

NS_IMETHODIMP nsMsgFilterList::GetListId(nsACString &aListId) {
  aListId.Assign(m_listId);
  return NS_OK;
}