Adding upstream version 4.2.2.upstream/4.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 217 insertions, 0 deletions

diff --git a/include/ws_symbol_export.h b/include/ws_symbol_export.h
new file mode 100644
index 0000000..3de71a8
--- /dev/null
+++ b/include/ws_symbol_export.h
@@ -0,0 +1,217 @@
+/** @file
+ * Cross platform defines for exporting symbols from shared libraries
+ *
+ * Wireshark - Network traffic analyzer
+ * By Balint Reczey <balint@balintreczey.hu>
+ * Copyright 2013 Balint Reczey
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "ws_compiler_tests.h"
+
+/** Reset symbol export behavior.
+ * If you {un}define WS_BUILD_DLL on the fly you'll have to define this
+ * as well.
+ */
+#ifdef RESET_SYMBOL_EXPORT
+
+#ifdef SYMBOL_EXPORT_H
+#undef SYMBOL_EXPORT_H
+#endif
+
+#ifdef WS_DLL_PUBLIC
+#undef WS_DLL_PUBLIC
+#endif
+
+#ifdef WS_DLL_PUBLIC_DEF
+#undef WS_DLL_PUBLIC_DEF
+#endif
+
+#ifdef WS_DLL_LOCAL
+#undef WS_DLL_LOCAL
+#endif
+
+#endif /* RESET_SYMBOL_EXPORT */
+
+#ifndef SYMBOL_EXPORT_H
+#define SYMBOL_EXPORT_H
+
+/*
+ * NOTE: G_HAVE_GNUC_VISIBILITY is defined only if all of
+ *
+ *    __attribute__ ((visibility ("hidden")))
+ *
+ *    __attribute__ ((visibility ("internal")))
+ *
+ *    __attribute__ ((visibility ("protected")))
+ *
+ *    __attribute__ ((visibility ("default")))
+ *
+ * are supported, and at least some versions of GCC from Apple support
+ * "default" and "hidden" but not "internal" or "protected", so it
+ * shouldn't be used to determine whether "hidden" or "default" is
+ * supported.
+ *
+ * This also means that we shouldn't use G_GNUC_INTERNAL instead of
+ * WS_DLL_LOCAL, as GLib uses G_HAVE_GNUC_VISIBILITY to determine
+ * whether to use __attribute__ ((visibility ("hidden"))) for
+ * G_GNUC_INTERNAL, and that will not use it even with compilers
+ * that support it.
+ */
+
+/* Originally copied from GCC Wiki at https://gcc.gnu.org/wiki/Visibility */
+#if defined _WIN32 || defined __CYGWIN__
+  /* Compiling for Windows, so we use the Windows DLL declarations. */
+  #ifdef WS_BUILD_DLL
+    /*
+     * Building a DLL; for all definitions, we want dllexport, and
+     * (presumably so source from DLL and source from a program using the
+     * DLL can both include a header that declares APIs and exported data
+     * for the DLL), for declarations, either dllexport or dllimport will
+     * work (they mean the same thing for a declaration when building a DLL).
+     */
+    #ifdef __GNUC__
+      /* GCC */
+      #define WS_DLL_PUBLIC_DEF __attribute__ ((dllexport))
+    #else /* ! __GNUC__ */
+      /*
+       * Presumably MSVC.
+       * Note: actually gcc seems to also support this syntax.
+       */
+      #define WS_DLL_PUBLIC_DEF __declspec(dllexport)
+    #endif /* __GNUC__ */
+  #else /* WS_BUILD_DLL */
+    /*
+     * Building a program; we should only see declarations, not definitions,
+     * with WS_DLL_PUBLIC, and they all represent APIs or data imported
+     * from a DLL, so use dllimport.
+     *
+     * For functions, export shouldn't be necessary; for data, it might
+     * be necessary, e.g. if what's declared is an array whose size is
+     * not given in the declaration.
+     */
+    #ifdef ENABLE_STATIC
+      /*
+       * We're building all-static, so we're not building any DLLs.
+       */
+      #define WS_DLL_PUBLIC_DEF
+    #elif defined(__GNUC__)
+      /* GCC */
+      #define WS_DLL_PUBLIC_DEF __attribute__ ((dllimport))
+    #else /* ! ENABLE_STATIC && ! __GNUC__ */
+      /*
+       * Presumably MSVC, and we're not building all-static.
+       * Note: actually gcc seems to also support this syntax.
+       */
+      #define WS_DLL_PUBLIC_DEF __declspec(dllimport)
+    #endif
+  #endif /* WS_BUILD_DLL */
+
+  /*
+   * Symbols in a DLL are *not* exported unless they're specifically
+   * flagged as exported, so, for a non-static but non-exported
+   * symbol, we don't have to do anything.
+   */
+  #define WS_DLL_LOCAL
+#else /* defined _WIN32 || defined __CYGWIN__ */
+  /*
+   * Compiling for UN*X, where the dllimport and dllexport stuff
+   * is neither necessary nor supported; just specify the
+   * visibility if we have a compiler that supports doing so.
+   */
+  #if WS_IS_AT_LEAST_GNUC_VERSION(3,4) \
+      || WS_IS_AT_LEAST_XL_C_VERSION(12,0)
+    /*
+     * GCC 3.4 or later, or some compiler asserting compatibility with
+     * GCC 3.4 or later, or XL C 13.0 or later, so we have
+     * __attribute__((visibility()).
+     */
+
+    /*
+     * Symbols exported from libraries.
+     */
+    #define WS_DLL_PUBLIC_DEF __attribute__ ((visibility ("default")))
+
+    /*
+     * Non-static symbols *not* exported from libraries.
+     */
+    #define WS_DLL_LOCAL  __attribute__ ((visibility ("hidden")))
+  #elif WS_IS_AT_LEAST_SUNC_VERSION(5,5)
+    /*
+     * Sun C 5.5 or later, so we have __global and __hidden.
+     * (Sun C 5.9 and later also have __attribute__((visibility()),
+     * but there's no reason to prefer it with Sun C.)
+     */
+
+    /*
+     * Symbols exported from libraries.
+     */
+    #define WS_DLL_PUBLIC_DEF __global
+
+    /*
+     * Non-static symbols *not* exported from libraries.
+     */
+    #define WS_DLL_LOCAL __hidden
+  #else
+    /*
+     * We have neither a way to make stuff not explicitly marked as
+     * visible invisible outside a library nor a way to make stuff
+     * explicitly marked as local invisible outside the library.
+     */
+
+    /*
+     * Symbols exported from libraries.
+     */
+    #define WS_DLL_PUBLIC_DEF
+
+    /*
+     * Non-static symbols *not* exported from libraries.
+     */
+    #define WS_DLL_LOCAL
+  #endif
+#endif
+
+/*
+ * You *must* use this for exported data *declarations*; if you use
+ * WS_DLL_PUBLIC_DEF, some compilers, such as MSVC++, will complain
+ * about array definitions with no size.
+ *
+ * You must *not* use this for exported data *definitions*, as that
+ * will, for some compilers, cause warnings about items being initialized
+ * and declared extern.
+ *
+ * Either can be used for exported *function* declarations and definitions.
+ */
+#define WS_DLL_PUBLIC  WS_DLL_PUBLIC_DEF extern
+
+/*
+ * This is necessary to export symbols from wsutil to another DLL
+ * (not an executable) using MSVC.
+ */
+#ifdef _MSC_VER
+#  ifdef BUILD_WSUTIL
+#    define WSUTIL_EXPORT  __declspec(dllexport) extern
+#  else
+#    define WSUTIL_EXPORT  __declspec(dllimport) extern
+#  endif
+#else /* _MSC_VER */
+#  define WSUTIL_EXPORT    WS_DLL_PUBLIC
+#endif /* _MSC_VER */
+
+
+
+#endif /* SYMBOL_EXPORT_H */
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local Variables:
+ * c-basic-offset: 2
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=2 tabstop=8 expandtab:
+ * :indentSize=2:tabSize=8:noTabs=true:
+ */