1 : /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /* ex: set tabstop=8 softtabstop=4 shiftwidth=4 expandtab: */
3 : /* ***** BEGIN LICENSE BLOCK *****
4 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
5 : *
6 : * The contents of this file are subject to the Mozilla Public License Version
7 : * 1.1 (the "License"); you may not use this file except in compliance with
8 : * the License. You may obtain a copy of the License at
9 : * http://www.mozilla.org/MPL/
10 : *
11 : * Software distributed under the License is distributed on an "AS IS" basis,
12 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13 : * for the specific language governing rights and limitations under the
14 : * License.
15 : *
16 : * The Original Code is the Mozilla PostScript driver printer list component.
17 : *
18 : * The Initial Developer of the Original Code is
19 : * Kenneth Herron <kherron+mozilla@fmailbox.com>
20 : * Portions created by the Initial Developer are Copyright (C) 2004
21 : * the Initial Developer. All Rights Reserved.
22 : *
23 : * Contributor(s):
24 : *
25 : * Alternatively, the contents of this file may be used under the terms of
26 : * either the GNU General Public License Version 2 or later (the "GPL"), or
27 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28 : * in which case the provisions of the GPL or the LGPL are applicable instead
29 : * of those above. If you wish to allow use of your version of this file only
30 : * under the terms of either the GPL or the LGPL, and not to allow others to
31 : * use your version of this file under the terms of the MPL, indicate your
32 : * decision by deleting the provisions above and replace them with the notice
33 : * and other provisions required by the GPL or the LGPL. If you do not delete
34 : * the provisions above, a recipient may use your version of this file under
35 : * the terms of any one of the MPL, the GPL or the LGPL.
36 : *
37 : * ***** END LICENSE BLOCK ***** */
38 :
39 : #include "nsDebug.h"
40 : #include "nsString.h"
41 : #include "nsCUPSShim.h"
42 : #include "prlink.h"
43 :
44 :
45 : // List of symbols to find in libcups. Must match symAddr[] defined in Init().
46 : // Making this an array of arrays instead of pointers allows storing the
47 : // whole thing in read-only memory.
48 : static const char gSymName[][sizeof("cupsPrintFile")] = {
49 : { "cupsAddOption" },
50 : { "cupsFreeDests" },
51 : { "cupsGetDest" },
52 : { "cupsGetDests" },
53 : { "cupsPrintFile" },
54 : { "cupsTempFd" },
55 : };
56 : static const int gSymNameCt = NS_ARRAY_LENGTH(gSymName);
57 :
58 :
59 : bool
60 0 : nsCUPSShim::Init()
61 : {
62 0 : mCupsLib = PR_LoadLibrary("libcups.so.2");
63 0 : if (!mCupsLib)
64 0 : return false;
65 :
66 : // List of symbol pointers. Must match gSymName[] defined above.
67 : void **symAddr[] = {
68 : (void **)&mCupsAddOption,
69 : (void **)&mCupsFreeDests,
70 : (void **)&mCupsGetDest,
71 : (void **)&mCupsGetDests,
72 : (void **)&mCupsPrintFile,
73 : (void **)&mCupsTempFd,
74 0 : };
75 :
76 0 : for (int i = gSymNameCt; i--; ) {
77 0 : *(symAddr[i]) = PR_FindSymbol(mCupsLib, gSymName[i]);
78 0 : if (! *(symAddr[i])) {
79 : #ifdef DEBUG
80 0 : nsCAutoString msg(gSymName[i]);
81 0 : msg.Append(" not found in CUPS library");
82 0 : NS_WARNING(msg.get());
83 : #endif
84 0 : PR_UnloadLibrary(mCupsLib);
85 0 : mCupsLib = nsnull;
86 0 : return false;
87 : }
88 : }
89 0 : return true;
90 : }
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