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/*##############################################################################
FUNNNELWEB COPYRIGHT
====================
FunnelWeb is a literate-programming macro preprocessor.
The FunnelWeb web is at http://www.ross.net/funnelweb/
Copyright (c) Ross N. Williams 1992. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of Version 2 of the GNU General Public License as
published by the Free Software Foundation (http://www.gnu.org/).
This program is distributed WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See Version 2 of the GNU General Public License for more details.
You should have received a copy of Version 2 of the GNU General Public
License along with this program. If not, you can obtain a copy as follows:
ftp://prep.ai.mit.edu/pub/gnu/COPYING-2.0
or write to:
Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
Section 2a of the license requires that all changes to this file be
recorded prominently in this file. Please record all changes here.
Programmers:
RNW Ross N. Williams (ross@ross.net)
Changes:
07-May-1992 RNW Program prepared for release under GNU GPL V2.
15-May-1999 RNW Modified STDC definition for Digital Unix.
15-May-1999 RNW Added support for FreeBSD.
##############################################################################*/
/******************************************************************************/
/* ENVIRON.H */
/******************************************************************************/
/* */
/* WARNING: DO NOT ADD ANY PROGRAM-DEPENDENT DEFINITIONS. */
/* */
/* This header file environ.h contains definitions and objects whose values */
/* depends directly on the compilation and execution environment, but are */
/* otherwise independent of any particular computer program. */
/* */
/* This is one of two machine-dependent, program-independent modules. The */
/* other module is machin (machin.h,machin.c). This "environ" module contains */
/* definitions and objects that are considered essential. The "machin" module */
/* contains less essential definitions. Motivation for the division came from */
/* the fact that style.h (used by almost every module) includes environ.h */
/* (this file), and from the need for the stuff in style.h by some */
/* environment-dependent definitions. */
/* */
/* There seems to be two ways to organize a module such as this one. The */
/* first is to have a different version of this module for each target */
/* environment. The second is to have a single file that uses #defines and */
/* #ifs to select between code for each target environment. I have chosen the */
/* latter method as this allows many different environments to share the same */
/* definitions. */
/* */
/******************************************************************************/
/* Ensure that the body of this header file is included at most once. */
#ifndef DONE_ENVIRON
#define DONE_ENVIRON
/******************************************************************************/
/* Detecting The Environment */
/* ------------------------- */
#define OS_MAC 0 /* Macintosh */
#define OS_DOS 0 /* MS-DOS */
#define OS_VMS 0 /* OpenVMS */
#define OS_W32 0 /* Win32 */
#define OS_UNX 0 /* Unix */
#define OS_HPU 0 /* HP/UX */
#define OS_OSF 0 /* Digital Unix */
#define OS_SUN 0 /* SunOS/Solaris */
#define OS_IRX 0 /* IRIX */
#define OS_B86 0 /* BSDOS */
#define OS_L86 0 /* Linux */
#define OS_AIX 0 /* AIX */
#define OS_FBD 0 /* FreeBSD */
#ifdef THINK_C
#undef OS_MAC
#define OS_MAC 1
#undef OS_MAC
#define OS_MAC 1
#endif
#ifdef __MWERKS__
#undef OS_MAC
#define OS_MAC 1
#undef OS_MAC
#define OS_MAC 1
#endif
#ifdef MSDOS
#undef OS_DOS
#define OS_DOS 1
#undef OS_DOS
#define OS_DOS 1
#endif
#ifdef __DOS__
#undef OS_DOS
#define OS_DOS 1
#undef OS_DOS
#define OS_DOS 1
#endif
#ifdef __BORLANDC__
#undef OS_DOS
#define OS_DOS 1
#undef OS_DOS
#define OS_DOS 1
#endif
#ifdef VMS
#undef OS_VMS
#define OS_VMS 1
#undef OS_VMS
#define OS_VMS 1
#endif
#ifdef _WIN32
#undef OS_W32
#define OS_W32 1
#undef OS_W32
#define OS_W32 1
#endif
#ifdef __hpux
#undef OS_UNX
#define OS_UNX 1
#undef OS_HPU
#define OS_HPU 1
#endif
#ifdef __osf__
#undef OS_UNX
#define OS_UNX 1
#undef OS_OSF
#define OS_OSF 1
#endif
#ifdef sun
#undef OS_UNX
#define OS_UNX 1
#undef OS_SUN
#define OS_SUN 1
#endif
#ifdef __ultrix
#undef OS_UNX
#define OS_UNX 1
#undef OS_ULT
#define OS_ULT 1
#endif
#ifdef __sgi
#undef OS_UNX
#define OS_UNX 1
#undef OS_IRX
#define OS_IRX 1
#endif
#ifdef __386BSD__
#undef OS_UNX
#define OS_UNX 1
#undef OS_B86
#define OS_B86 1
#endif
#if defined( __linux__) || defined(__GLIBC__) || defined(__GNU__)
#undef OS_UNX
#define OS_UNX 1
#undef OS_L86
#define OS_L86 1
#endif
#ifdef _AIX
#undef OS_UNX
#define OS_UNX 1
#undef OS_AIX
#define OS_AIX 1
#endif
#ifdef __FreeBSD__
#undef OS_UNX
#define OS_UNX 1
#undef OS_FBD
#define OS_FBD 1
#endif
#if (OS_MAC + OS_UNX + OS_VMS + OS_DOS + OS_W32) == 0
#error Error: No operating system class has been selected.
#endif
#if (OS_MAC + OS_UNX + OS_VMS + OS_DOS + OS_W32) > 1
#error Error: More than one operating system class has been selected.
#endif
#if OS_UNX
#define OS_UNXSUM1 (OS_HPU+OS_OSF+OS_SUN+OS_SOL+OS_ULT)
#define OS_UNXSUM2 (OS_IRX+OS_B86+OS_L86+OS_AIX+OS_FBD)
#if ((OS_UNXSUM1+OS_UNXSUM2) != 1)
#error Error: Exactly one Unix operating system must be chosen.
#endif
#endif
#define BEGIN_OS
#define END_OS
/******************************************************************************/
/* Establish Presence or Absence of __STDC__ */
/* ----------------------------------------- */
/* The __STDC__ symbol is very useful for determining if the compiler is */
/* ANSI. However, some "nearly ANSI" compilers don't set this symbol, and */
/* experience shows that things turn out better if it is set. */
/* This section decides if __STDC__ should be defined. */
/* The Macintosh THINK C compiler seems to be ANSI standard but, strangely */
/* does not define the standard preprocessor symbol __STDC__ that indicates */
/* this. Instead it defines THINK_C. Here, we execute the link manually. */
/* For more information see the THINK C User's Manual, Chapter 57: "Language */
/* Reference", Section 12.10, p.442. */
#if OS_VMS || OS_OSF
#define __STDC__ 1
#endif
#ifdef __VISUALC__
#define __STDC__ 1
#endif
#ifdef __MWERKS__
#undef __STDC__
#define __STDC__ 1
#endif
/******************************************************************************/
/* Switch From Definedness to Boolean Symbols */
/* ------------------------------------------ */
/* Use of the definedness of a preprocessor symbol to detect a condition is */
/* convenient if it is desired that only one condition be tested at a time. */
/* However, if we want to OR conditions, it is more convenient to use defined */
/* symbols that are either 0 or 1. This section contains ifdefs that do this. */
#ifdef __STDC__
#define STDC 1
#else
#define STDC 0
#endif
/* Note: If THINK_C is predefined, it is predefined to be 1. */
#ifndef THINK_C
#define THINK_C 0
#endif
/******************************************************************************/
/* Void */
/* ---- */
/* Define void if necessary and define pointer to void. */
/* This idea from the book "Portable C", p.41. */
/* If necessary, add a boolean condition to cover your environment. */
/* Note: The "| OS_SUN" is a last minute desperate hack. */
#if STDC || OS_SUN || OS_AIX
#define p_void void *
#else
typedef int void;
#define p_void char *
#endif
/* The following function is here solely to act as a first tripping point for */
/* environments with no "void" so that the users trying to port this code */
/* will look here first instead of starting to delete voids in the program. */
extern void test_void();
/******************************************************************************/
/* Const */
/* ----- */
/* It's useful to be able to specify that certain objects are constants. */
/* Unfortunately, the "const" construct is only available in ANSI C and so we */
/* have to have a macro so as to cope with non-ANSI compilers. */
/* Note: THINK-C is nearly ANSI, but does not support "const". */
#if STDC & !THINK_C
#define CONST const
#else
#define CONST
#endif
/******************************************************************************/
/* Prototypes */
/* ---------- */
/* Define a macro to wrap around prototype parameter lists so as to support */
/* compilers with and without prototypes. */
/* This idea came from the book "Portable C", S3.1, p.32. */
#if STDC
#define P_(A) A
#else
#define P_(A) ()
#endif
/******************************************************************************/
/* Structure Assignments */
/* --------------------- */
/* Structure assignments are not supported on some of the older compilers and */
/* so we use a macro to perform such operations. */
/* This idea came from the book "Portable C", S8.2.2, p.184. */
#if STDC
#define ASSIGN(a,b) ((a)=(b))
#else
#define ASSIGN(a,b) (memcpy((char *)&(a),(char *)&(b),sizeof(a)))
#endif
/******************************************************************************/
/* VMS EXIT STATUS */
/* --------------- */
/* The VAX C compiler I used doesn't seem to be ANSI. This means that the */
/* exit symbols aren't set up properly. Furthermore, the sensible defaults */
/* in the style.h file don't work for VMS. The upshot is that we have to do */
/* a special case. Note: The top bit set in a VMS exit status means suppress */
/* diagnostic message. Even status means failure. Odd means success. */
#if OS_VMS
#undef EXIT_SUCCESS
#undef EXIT_FAILURE
#define EXIT_SUCCESS 1
#define EXIT_FAILURE (0x10000002)
#endif
/******************************************************************************/
/* For #ifndef preventing multiple inclusion of the body of this header file. */
#endif
/******************************************************************************/
/* End of ENVIRON.H */
/******************************************************************************/
|
