C++ nsCString::EndReading方法代码示例

void nsMsgI18NConvertRawBytesToUTF8(const nsCString& inString, 
                                    const char* charset,
                                    nsACString& outString)
{
  if (MsgIsUTF8(inString))
  {
    outString.Assign(inString);
    return;
  }

  nsAutoString utf16Text;
  nsresult rv = ConvertToUnicode(charset, inString, utf16Text);
  if (NS_SUCCEEDED(rv))
  {
    CopyUTF16toUTF8(utf16Text, outString);
    return;
  }

  // EF BF BD (UTF-8 encoding of U+FFFD)
  NS_NAMED_LITERAL_CSTRING(utf8ReplacementChar, "\357\277\275");
  const char* cur = inString.BeginReading();
  const char* end = inString.EndReading();
  outString.Truncate();
  while (cur < end) {
    char c = *cur++;
    if (c & char(0x80))
      outString.Append(utf8ReplacementChar);
    else
      outString.Append(c);
  }
}

/**
 * Check if the host name starts with ftp\d*\. and it's not directly followed
 * by the tld.
 */
bool nsDefaultURIFixup::IsLikelyFTP(const nsCString &aHostSpec)
{
    bool likelyFTP = false;
    if (aHostSpec.EqualsIgnoreCase("ftp", 3)) {
        nsACString::const_iterator iter;
        nsACString::const_iterator end;
        aHostSpec.BeginReading(iter);
        aHostSpec.EndReading(end);
        iter.advance(3); // move past the "ftp" part

        while (iter != end)
        {
            if (*iter == '.') {
                // now make sure the name has at least one more dot in it
                ++iter;
                while (iter != end)
                {
                    if (*iter == '.') {
                        likelyFTP = true;
                        break;
                    }
                    ++iter;
                }
                break;
            }
            else if (!nsCRT::IsAsciiDigit(*iter)) {
                break;
            }
            ++iter;
        }
    }
    return likelyFTP;
}

void nsMsgI18NConvertRawBytesToUTF16(const nsCString& inString, 
                                     const char* charset,
                                     nsAString& outString)
{
  if (MsgIsUTF8(inString))
  {
    CopyUTF8toUTF16(inString, outString);
    return;
  }

  nsresult rv = ConvertToUnicode(charset, inString, outString);
  if (NS_SUCCEEDED(rv))
    return;

  const char* cur = inString.BeginReading();
  const char* end = inString.EndReading();
  outString.Truncate();
  while (cur < end) {
    char c = *cur++;
    if (c & char(0x80))
      outString.Append(UCS2_REPLACEMENT_CHAR);
    else
      outString.Append(c);
  }
}

static void ReplaceChar(nsCString& str, const nsACString& character,
                        const nsACString& replacement)
{
  nsCString::const_iterator start, end;

  str.BeginReading(start);
  str.EndReading(end);

  while (FindInReadable(character, start, end)) {
    PRInt32 pos = end.size_backward();
    str.Replace(pos - 1, 1, replacement);

    str.BeginReading(start);
    start.advance(pos + replacement.Length() - 1);
    str.EndReading(end);
  }
}

static void
rdf_EscapeAmpersandsAndAngleBrackets(nsCString& s)
{
    uint32_t newLength, origLength;
    newLength = origLength = s.Length();

    // Compute the length of the result string.
    const char* start = s.BeginReading();
    const char* end = s.EndReading();
    const char* c = start;
    while (c != end) {
        switch (*c) {
        case '&' :
            newLength += sizeof(amp) - 2;
            break;
        case '<':
        case '>':
            newLength += sizeof(gt) - 2;
            break;
        default:
            break;
        }
        ++c;
    }
    if (newLength == origLength) {
        // nothing to escape
        return;
    }

    // escape the chars from the end back to the front.
    s.SetLength(newLength);

    // Buffer might have changed, get the pointers again
    start = s.BeginReading(); // begin of string
    c = start + origLength - 1; // last char in original string
    char* w = s.EndWriting() - 1; // last char in grown buffer
    while (c >= start) {
        switch (*c) {
        case '&' :
            w -= 4;
            nsCharTraits<char>::copy(w, amp, sizeof(amp) - 1);
            break;
        case '<':
            w -= 3;
            nsCharTraits<char>::copy(w, lt, sizeof(lt) - 1);
            break;
        case '>':
            w -= 3;
            nsCharTraits<char>::copy(w, gt, sizeof(gt) - 1);
            break;
        default:
            *w = *c;
        }
        --w;
        --c;
    }
}

bool
GMPChild::RecvSetNodeId(const nsCString& aNodeId)
{
  // Store the per origin salt for the node id. Note: we do this in a
  // separate message than RecvStartPlugin() so that the string is not
  // sitting in a string on the IPC code's call stack.
  mNodeId = std::string(aNodeId.BeginReading(), aNodeId.EndReading());
  return true;
}

nsMediaFragmentURIParser::nsMediaFragmentURIParser(const nsCString& aSpec)
{
  nsReadingIterator<char> start, end;
  aSpec.BeginReading(start);
  aSpec.EndReading(end);
  if (FindCharInReadable('#', start, end)) {
    mHash = Substring(++start, end);
  }
}

nsresult nsDOMOfflineResourceList::GetCacheKey(nsIURI* aURI, nsCString& aKey) {
  nsresult rv = aURI->GetAsciiSpec(aKey);
  NS_ENSURE_SUCCESS(rv, rv);

  // url fragments aren't used in cache keys
  nsAutoCString::const_iterator specStart, specEnd;
  aKey.BeginReading(specStart);
  aKey.EndReading(specEnd);
  if (FindCharInReadable('#', specStart, specEnd)) {
    aKey.BeginReading(specEnd);
    aKey = Substring(specEnd, specStart);
  }

  return NS_OK;
}

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;
}