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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#ifndef mozHunspellFileMgrHost_h
#define mozHunspellFileMgrHost_h
#include <map>
#include <memory>
#include <mutex>
#include <stdint.h>
#include <string>
#include "mozilla/Result.h"
#include "mozilla/ResultExtensions.h"
#include "mozilla/RWLock.h"
#include "nsIInputStream.h"
#include "nsReadLine.h"
namespace mozilla {
class mozHunspellFileMgrHost final {
public:
/**
* aFilename must be a local file/jar URI for the file to load.
*
* aKey is the decription key for encrypted Hunzip files, and is
* unsupported. The argument is there solely for compatibility.
*/
explicit mozHunspellFileMgrHost(const char* aFilename,
const char* aKey = nullptr);
~mozHunspellFileMgrHost() = default;
bool GetLine(std::string& aResult);
int GetLineNum() const { return mLineNum; }
private:
mozilla::Result<mozilla::Ok, nsresult> Open(const nsACString& aPath);
mozilla::Result<mozilla::Ok, nsresult> ReadLine(nsACString& aLine);
int mLineNum = 0;
nsCOMPtr<nsIInputStream> mStream;
nsLineBuffer<char> mLineBuffer;
};
class mozHunspellCallbacks {
public:
// APIs invoked by the sandboxed hunspell file manager
static uint32_t CreateFilemgr(const char* aFilename, const char* aKey);
static bool GetLine(uint32_t aFd, char** aLinePtr);
static int GetLineNum(uint32_t aFd);
static void DestructFilemgr(uint32_t aFd);
private:
/**
* sFileMgrMap holds a map between unique uint32_t
* integers and mozHunspellFileMgrHost instances
*/
static std::map<uint32_t, std::unique_ptr<mozHunspellFileMgrHost>>
sFileMgrMap;
/**
* Reader-writer lock for the sFileMgrMap
*/
static mozilla::detail::StaticRWLock sFileMgrMapLock;
/**
* Tracks the next possibly unused id for sFileMgrMap
*/
static uint32_t sCurrentFreshId;
/**
* Returns an unused id for sFileMgrMap
*/
static uint32_t GetFreshId();
/**
* Returns the mozHunspellFileMgrHost for the given uint32_t id
*/
static mozHunspellFileMgrHost& GetMozHunspellFileMgrHost(uint32_t aFd);
};
} // namespace mozilla
#endif
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