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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: */
/* 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/. */
#include "nsDebug.h"
#include "nsString.h"
#include "nsCUPSShim.h"
#include "mozilla/ArrayUtils.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 = mozilla::ArrayLength(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
nsAutoCString msg(gSymName[i]);
msg.AppendLiteral(" not found in CUPS library");
NS_WARNING(msg.get());
#endif
PR_UnloadLibrary(mCupsLib);
mCupsLib = nullptr;
return false;
}
}
return true;
}
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