nsCUPSShim.h

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ex: set tabstop=8 softtabstop=4 shiftwidth=4 expandtab: */
/* 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 nsCUPSShim_h___
#define nsCUPSShim_h___

#include <cups/cups.h>

struct PRLibrary;

/* Note: this class relies on static initialization. */
class nsCUPSShim {
 public:
  /**
   * Initialize this object. Attempt to load the CUPS shared
   * library and find function pointers for the supported
   * functions (see below).
   * @return false if the shared library could not be loaded, or if
   *                  any of the functions could not be found.
   *         true  for successful initialization.
   */
  bool Init();

  /**
   * @return true  if the object was initialized successfully.
   *         false otherwise.
   */
  bool IsInitialized() const { return mInited; }

  /* Function pointers for supported functions. These are only
   * valid after successful initialization.
   */
  decltype(cupsAddOption)* mCupsAddOption;
  decltype(cupsCheckDestSupported)* mCupsCheckDestSupported;
  decltype(cupsCopyDest)* mCupsCopyDest;
  decltype(cupsCopyDestInfo)* mCupsCopyDestInfo;
  decltype(cupsFreeDestInfo)* mCupsFreeDestInfo;
  decltype(cupsFreeDests)* mCupsFreeDests;
  decltype(cupsGetDest)* mCupsGetDest;
  decltype(cupsGetDests)* mCupsGetDests;
  decltype(cupsPrintFile)* mCupsPrintFile;
  decltype(cupsTempFd)* mCupsTempFd;

 private:
  bool mInited = false;
  PRLibrary* mCupsLib;
};

#endif /* nsCUPSShim_h___ */