gecko/widget/gtk2/nsCUPSShim.cpp

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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ex: set tabstop=8 softtabstop=4 shiftwidth=4 expandtab: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Mozilla PostScript driver printer list component.
*
* The Initial Developer of the Original Code is
* Kenneth Herron <kherron+mozilla@fmailbox.com>
* Portions created by the Initial Developer are Copyright (C) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsDebug.h"
#include "nsString.h"
#include "nsCUPSShim.h"
#include "prlink.h"
// List of symbols to find in libcups. Must match symAddr[] defined in Init().
// Making this an array of arrays instead of pointers allows storing the
// whole thing in read-only memory.
static const char gSymName[][sizeof("cupsPrintFile")] = {
{ "cupsAddOption" },
{ "cupsFreeDests" },
{ "cupsGetDest" },
{ "cupsGetDests" },
{ "cupsPrintFile" },
{ "cupsTempFd" },
};
static const int gSymNameCt = NS_ARRAY_LENGTH(gSymName);
bool
nsCUPSShim::Init()
{
mCupsLib = PR_LoadLibrary("libcups.so.2");
if (!mCupsLib)
return false;
// List of symbol pointers. Must match gSymName[] defined above.
void **symAddr[] = {
(void **)&mCupsAddOption,
(void **)&mCupsFreeDests,
(void **)&mCupsGetDest,
(void **)&mCupsGetDests,
(void **)&mCupsPrintFile,
(void **)&mCupsTempFd,
};
for (int i = gSymNameCt; i--; ) {
*(symAddr[i]) = PR_FindSymbol(mCupsLib, gSymName[i]);
if (! *(symAddr[i])) {
#ifdef DEBUG
nsCAutoString msg(gSymName[i]);
msg.Append(" not found in CUPS library");
NS_WARNING(msg.get());
#endif
PR_UnloadLibrary(mCupsLib);
mCupsLib = nsnull;
return false;
}
}
return true;
}