#include "opensslconf.h"

#ifndef HEADER_E_OS2_H
#define HEADER_E_OS2_H

#ifdef __cplusplus
extern "C" {
#endif

/******************************************************************************
 * Detect operating systems.  This probably needs completing.
 * The result is that at least one OPENSSL_SYS_os macro should be defined.
 * However, if none is defined, Unix is assumed.
 **/

#define OPENSSL_SYS_UNIX

/* ----------------------- Macintosh, before MacOS X ----------------------- */
#if defined(__MWERKS__) && defined(macintosh) || defined(OPENSSL_SYSNAME_MAC)
#undef OPENSSL_SYS_UNIX
#define OPENSSL_SYS_MACINTOSH_CLASSIC
#endif

/* ----------------------- NetWare ----------------------------------------- */
#if defined(NETWARE) || defined(OPENSSL_SYSNAME_NETWARE)
#undef OPENSSL_SYS_UNIX
#define OPENSSL_SYS_NETWARE
#endif

/* ---------------------- Microsoft operating systems ---------------------- */

/* Note that MSDOS actually denotes 32-bit environments running on top of
   MS-DOS, such as DJGPP one. */
#if defined(OPENSSL_SYSNAME_MSDOS)
#undef OPENSSL_SYS_UNIX
#define OPENSSL_SYS_MSDOS
#endif

/* For 32 bit environment, there seems to be the CygWin environment and then
   all the others that try to do the same thing Microsoft does... */
#if defined(OPENSSL_SYSNAME_UWIN)
#undef OPENSSL_SYS_UNIX
#define OPENSSL_SYS_WIN32_UWIN
#else
#if defined(__CYGWIN32__) || defined(OPENSSL_SYSNAME_CYGWIN32)
#undef OPENSSL_SYS_UNIX
#define OPENSSL_SYS_WIN32_CYGWIN
#else
#if defined(_WIN32) || defined(OPENSSL_SYSNAME_WIN32)
#undef OPENSSL_SYS_UNIX
#define OPENSSL_SYS_WIN32
#endif
#if defined(OPENSSL_SYSNAME_WINNT)
#undef OPENSSL_SYS_UNIX
#define OPENSSL_SYS_WINNT
#endif
#if defined(OPENSSL_SYSNAME_WINCE)
#undef OPENSSL_SYS_UNIX
#define OPENSSL_SYS_WINCE
#endif
#endif
#endif

/* Anything that tries to look like Microsoft is "Windows" */
#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WINNT) ||                \
	defined(OPENSSL_SYS_WINCE)
#undef OPENSSL_SYS_UNIX
#define OPENSSL_SYS_WINDOWS
#ifndef OPENSSL_SYS_MSDOS
#define OPENSSL_SYS_MSDOS
#endif
#endif

/* DLL settings.  This part is a bit tough, because it's up to the application
   implementor how he or she will link the application, so it requires some
   macro to be used. */
#ifdef OPENSSL_SYS_WINDOWS
#ifndef OPENSSL_OPT_WINDLL
#if defined(_WINDLL) /* This is used when building OpenSSL to indicate that
                          DLL linkage should be used */
#define OPENSSL_OPT_WINDLL
#endif
#endif
#endif

/* -------------------------------- OpenVMS -------------------------------- */
#if defined(__VMS) || defined(VMS) || defined(OPENSSL_SYSNAME_VMS)
#undef OPENSSL_SYS_UNIX
#define OPENSSL_SYS_VMS
#if defined(__DECC)
#define OPENSSL_SYS_VMS_DECC
#elif defined(__DECCXX)
#define OPENSSL_SYS_VMS_DECC
#define OPENSSL_SYS_VMS_DECCXX
#else
#define OPENSSL_SYS_VMS_NODECC
#endif
#endif

/* --------------------------------- OS/2 ---------------------------------- */
#if defined(__EMX__) || defined(__OS2__)
#undef OPENSSL_SYS_UNIX
#define OPENSSL_SYS_OS2
#endif

/* --------------------------------- Unix ---------------------------------- */
#ifdef OPENSSL_SYS_UNIX
#if defined(linux) || defined(__linux__) || defined(OPENSSL_SYSNAME_LINUX)
#define OPENSSL_SYS_LINUX
#endif
#ifdef OPENSSL_SYSNAME_MPE
#define OPENSSL_SYS_MPE
#endif
#ifdef OPENSSL_SYSNAME_SNI
#define OPENSSL_SYS_SNI
#endif
#ifdef OPENSSL_SYSNAME_ULTRASPARC
#define OPENSSL_SYS_ULTRASPARC
#endif
#ifdef OPENSSL_SYSNAME_NEWS4
#define OPENSSL_SYS_NEWS4
#endif
#ifdef OPENSSL_SYSNAME_MACOSX
#define OPENSSL_SYS_MACOSX
#endif
#ifdef OPENSSL_SYSNAME_MACOSX_RHAPSODY
#define OPENSSL_SYS_MACOSX_RHAPSODY
#define OPENSSL_SYS_MACOSX
#endif
#ifdef OPENSSL_SYSNAME_SUNOS
#define OPENSSL_SYS_SUNOS
#endif
#if defined(_CRAY) || defined(OPENSSL_SYSNAME_CRAY)
#define OPENSSL_SYS_CRAY
#endif
#if defined(_AIX) || defined(OPENSSL_SYSNAME_AIX)
#define OPENSSL_SYS_AIX
#endif
#endif

/* --------------------------------- VOS ----------------------------------- */
#ifdef OPENSSL_SYSNAME_VOS
#define OPENSSL_SYS_VOS
#endif

/* ------------------------------- VxWorks --------------------------------- */
#ifdef OPENSSL_SYSNAME_VXWORKS
#define OPENSSL_SYS_VXWORKS
#endif

/**
 * That's it for OS-specific stuff
 *****************************************************************************/

/* Specials for I/O an exit */
#ifdef OPENSSL_SYS_MSDOS
#define OPENSSL_UNISTD_IO <io.h>
#define OPENSSL_DECLARE_EXIT extern void exit(int);
#else
#define OPENSSL_UNISTD_IO OPENSSL_UNISTD
#define OPENSSL_DECLARE_EXIT /* declared in unistd.h */
#endif

/* Definitions of OPENSSL_GLOBAL and OPENSSL_EXTERN, to define and declare
   certain global symbols that, with some compilers under VMS, have to be
   defined and declared explicitely with globaldef and globalref.
   Definitions of OPENSSL_EXPORT and OPENSSL_IMPORT, to define and declare
   DLL exports and imports for compilers under Win32.  These are a little
   more complicated to use.  Basically, for any library that exports some
   global variables, the following code must be present in the header file
   that declares them, before OPENSSL_EXTERN is used:

   #ifdef SOME_BUILD_FLAG_MACRO
   # undef OPENSSL_EXTERN
   # define OPENSSL_EXTERN OPENSSL_EXPORT
   #endif

   The default is to have OPENSSL_EXPORT, OPENSSL_IMPORT and OPENSSL_GLOBAL
   have some generally sensible values, and for OPENSSL_EXTERN to have the
   value OPENSSL_IMPORT.
*/

#if defined(OPENSSL_SYS_VMS_NODECC)
#define OPENSSL_EXPORT globalref
#define OPENSSL_IMPORT globalref
#define OPENSSL_GLOBAL globaldef
#elif defined(OPENSSL_SYS_WINDOWS) && defined(OPENSSL_OPT_WINDLL)
#define OPENSSL_EXPORT extern __declspec(dllexport)
#define OPENSSL_IMPORT extern __declspec(dllimport)
#define OPENSSL_GLOBAL
#else
#define OPENSSL_EXPORT extern
#define OPENSSL_IMPORT extern
#define OPENSSL_GLOBAL
#endif
#define OPENSSL_EXTERN OPENSSL_IMPORT

/* Macros to allow global variables to be reached through function calls when
   required (if a shared library version requvres it, for example.
   The way it's done allows definitions like this:

	// in foobar.c
	OPENSSL_IMPLEMENT_GLOBAL(int,foobar) = 0;
	// in foobar.h
	OPENSSL_DECLARE_GLOBAL(int,foobar);
	#define foobar OPENSSL_GLOBAL_REF(foobar)
*/
#ifdef OPENSSL_EXPORT_VAR_AS_FUNCTION
#define OPENSSL_IMPLEMENT_GLOBAL(type, name)                                   \
	extern type _hide_##name;                                              \
	type *_shadow_##name(void)                                             \
	{                                                                      \
		return &_hide_##name;                                          \
	}                                                                      \
	static type _hide_##name
#define OPENSSL_DECLARE_GLOBAL(type, name) type *_shadow_##name(void)
#define OPENSSL_GLOBAL_REF(name) (*(_shadow_##name()))
#else
#define OPENSSL_IMPLEMENT_GLOBAL(type, name) OPENSSL_GLOBAL type _shadow_##name
#define OPENSSL_DECLARE_GLOBAL(type, name) OPENSSL_EXPORT type _shadow_##name
#define OPENSSL_GLOBAL_REF(name) _shadow_##name
#endif

#ifdef __cplusplus
}
#endif
#endif
