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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /widget/nsCUPSShim.h
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'widget/nsCUPSShim.h')
-rw-r--r--widget/nsCUPSShim.h96
1 files changed, 96 insertions, 0 deletions
diff --git a/widget/nsCUPSShim.h b/widget/nsCUPSShim.h
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+/* -*- Mode: C; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ex: set tabstop=8 softtabstop=2 shiftwidth=2 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>
+#include "mozilla/Atomics.h"
+#include "mozilla/Mutex.h"
+
+// TODO: This should be a configure option, ideally.
+#ifndef XP_MACOSX
+# define CUPS_SHIM_RUNTIME_LINK
+#endif
+
+struct PRLibrary;
+
+class nsCUPSShim {
+ public:
+#ifdef CUPS_SHIM_RUNTIME_LINK
+ nsCUPSShim();
+ bool InitOkay() { return mInitOkay; }
+#else
+ nsCUPSShim() = default;
+ bool InitOkay() { return true; }
+#endif
+
+ // We allow some functions to be missing, to degrade as gracefully as possible
+ // for older versions of CUPS.
+ //
+ // The current target is CUPS 1.6 (bug 1701019).
+ enum class Optional : bool { No, Yes };
+
+ /**
+ * Function pointers for supported functions. These are only
+ * valid after successful initialization.
+ */
+#define CUPS_SHIM_ALL_FUNCS(X) \
+ X(Optional::No, cupsAddOption) \
+ X(Optional::No, cupsCheckDestSupported) \
+ X(Optional::No, cupsConnectDest) \
+ X(Optional::No, cupsCopyDest) \
+ X(Optional::No, cupsCopyDestInfo) \
+ X(Optional::No, cupsDoRequest) \
+ X(Optional::No, cupsEnumDests) \
+ X(Optional::No, cupsFreeDestInfo) \
+ X(Optional::No, cupsFreeDests) \
+ X(Optional::No, cupsGetDestMediaByName) \
+ X(Optional::Yes, cupsFindDestDefault) \
+ X(Optional::Yes, cupsGetDestMediaDefault) \
+ X(Optional::Yes, cupsGetDestMediaCount) \
+ X(Optional::Yes, cupsGetDestMediaByIndex) \
+ X(Optional::Yes, cupsLocalizeDestMedia) \
+ X(Optional::No, cupsGetDest) \
+ X(Optional::No, cupsGetDests) \
+ X(Optional::No, cupsGetDests2) \
+ X(Optional::No, cupsGetNamedDest) \
+ X(Optional::No, cupsGetOption) \
+ X(Optional::No, cupsServer) \
+ X(Optional::Yes, httpAddrPort) \
+ X(Optional::No, httpClose) \
+ X(Optional::No, httpGetHostname) \
+ X(Optional::Yes, httpGetAddress) \
+ X(Optional::No, ippAddString) \
+ X(Optional::No, ippAddStrings) \
+ X(Optional::No, ippDelete) \
+ X(Optional::No, ippFindAttribute) \
+ X(Optional::No, ippGetCount) \
+ X(Optional::No, ippGetString) \
+ X(Optional::No, ippNewRequest) \
+ X(Optional::No, ippPort)
+
+#ifdef CUPS_SHIM_RUNTIME_LINK
+ // Define a single field which holds a function pointer.
+# define CUPS_SHIM_FUNC_DECL(opt_, fn_) decltype(::fn_)* fn_ = nullptr;
+#else
+ // Define a static constexpr function pointer. GCC can sometimes optimize
+ // away the pointer fetch for this.
+# define CUPS_SHIM_FUNC_DECL(opt_, fn_) \
+ static constexpr decltype(::fn_)* const fn_ = ::fn_;
+#endif
+
+ CUPS_SHIM_ALL_FUNCS(CUPS_SHIM_FUNC_DECL)
+#undef CUPS_SHIM_FUNC_DECL
+
+#ifdef CUPS_SHIM_RUNTIME_LINK
+ private:
+ bool mInitOkay = false;
+ PRLibrary* mCupsLib = nullptr;
+#endif
+};
+
+#endif /* nsCUPSShim_h___ */