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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 mozHunspellRLBoxHost_h
#define mozHunspellRLBoxHost_h
#include <map>
#include <memory>
#include <mutex>
#include <set>
#include <stdint.h>
#include <string>
#include "RLBoxHunspell.h"
#include "mozilla/Result.h"
#include "mozilla/ResultExtensions.h"
#include "mozilla/RWLock.h"
#include "nsIChannel.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.
*/
explicit mozHunspellFileMgrHost(const nsCString& aFilename);
~mozHunspellFileMgrHost() = default;
bool GetLine(nsACString& aResult);
int GetLineNum() const { return mLineNum; }
static Result<int64_t, nsresult> GetSize(const nsCString& aFilename);
private:
static mozilla::Result<mozilla::Ok, nsresult> Open(
const nsCString& aPath, nsCOMPtr<nsIChannel>& aChannel,
nsCOMPtr<nsIInputStream>& aStream);
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 tainted_hunspell<uint32_t> CreateFilemgr(
rlbox_sandbox_hunspell& aSandbox,
tainted_hunspell<const char*> t_aFilename);
static tainted_hunspell<bool> GetLine(rlbox_sandbox_hunspell& aSandbox,
tainted_hunspell<uint32_t> t_aFd,
tainted_hunspell<char**> t_aLinePtr);
static tainted_hunspell<int> GetLineNum(rlbox_sandbox_hunspell& aSandbox,
tainted_hunspell<uint32_t> t_aFd);
static void DestructFilemgr(rlbox_sandbox_hunspell& aSandbox,
tainted_hunspell<uint32_t> t_aFd);
// APIs necessary for hunspell UTF encoding
static tainted_hunspell<uint32_t> ToUpperCase(
rlbox_sandbox_hunspell& aSandbox, tainted_hunspell<uint32_t> t_aChar);
static tainted_hunspell<uint32_t> ToLowerCase(
rlbox_sandbox_hunspell& aSandbox, tainted_hunspell<uint32_t> t_aChar);
static tainted_hunspell<struct cs_info*> GetCurrentCS(
rlbox_sandbox_hunspell& aSandbox, tainted_hunspell<const char*> t_es);
protected:
// API called by RLBox
/**
* Add filename to allow list.
*/
static void AllowFile(const nsCString& aFilename);
friend RLBoxHunspell* RLBoxHunspell::Create(const nsCString& affpath,
const nsCString& dpath);
/**
* Clear allow list and map of hunspell file managers.
*/
static void Clear();
friend RLBoxHunspell::~RLBoxHunspell();
private:
/**
* sFileMgrMap holds a map between unique uint32_t
* integers and mozHunspellFileMgrHost instances
*/
static std::map<uint32_t, std::unique_ptr<mozHunspellFileMgrHost>>
sFileMgrMap;
/**
* sFileMgrAllowList contains the filenames of the dictionary files hunspell
* is allowed to open
*/
static std::set<nsCString> sFileMgrAllowList;
/**
* Reader-writer lock for the sFileMgrMap
*/
static mozilla::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(
tainted_hunspell<uint32_t> t_aFd);
};
} // namespace mozilla
#endif
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