prelude.h

短小精悍的C语言标准函数库。提供450个以上的可移植的算法和工具代码。

/*  ----------------------------------------------------------------<Prolog>-
    Name:       prelude.h
    Title:      Universal Header File for C programming
    Package:    Standard Function Library (SFL)

    Written:    1993/03/29  iMatix SFL project team <[e-mail]>
    Revised:    2000/02/11

    Version:    2.04
    <TABLE>
    2.04_PH     Added BeOS support
    2.02_PH     Released with SFL 2.02
    </TABLE>

    Synopsis:   This header file encapsulates many generally-useful include
                files and defines lots of good stuff.  The intention of this
                header file is to hide the messy #ifdef's that you typically
                need to make real programs compile & run.  To use, specify
                as the first include file in your program.

                The main contributors to this file were:
                <Table>
                PH   Pieter Hintjens    <[e-mail]>
                EDM  Ewen McNeill       <[e-mail]>
                PA   Pascal Antonnaux   <[e-mail]>
                BW   Bruce Walter       <[e-mail]>
                RJ   Rob Judd           <[e-mail]>
                </Table>

    Copyright:  Copyright (c) 1991-99 iMatix Corporation
    License:    This is free software; you can redistribute it and/or modify
                it under the terms of the SFL License Agreement as provided
                in the file LICENSE.TXT.  This software is distributed in
                the hope that it will be useful, but without any warranty.
 ------------------------------------------------------------------</Prolog>-*/

#ifndef PRELUDE_INCLUDED               /*  Allow multiple inclusions        */
#define PRELUDE_INCLUDED


/*- Establish the compiler and computer system ------------------------------*/
/*
 *  Defines zero or more of these symbols, for use in any non-portable
 *  code:
 *
 *  __WINDOWS__         Microsoft C/C++ with Windows calls
 *  __MSDOS__           System is MS-DOS (set if __WINDOWS__ set)
 *  __VMS__             System is VAX/VMS or Alpha/OpenVMS
 *  __UNIX__            System is UNIX
 *  __OS2__             System is OS/2
 *
 *  __IS_32BIT__        OS/compiler is 32 bits
 *  __IS_64BIT__        OS/compiler is 64 bits
 *
 *  When __UNIX__ is defined, we also define exactly one of these:
 *
 *  __UTYPE_AUX         Apple AUX
 *  __UTYPE_BEOS        BeOS
 *  __UTYPE_BSDOS       BSD/OS
 *  __UTYPE_DECALPHA    Digital UNIX (Alpha)
 *  __UTYPE_IBMAIX      IBM RS/6000 AIX
 *  __UTYPE_FREEBSD     FreeBSD
 *  __UTYPE_HPUX        HP/UX
 *  __UTYPE_LINUX       Linux
 *  __UTYPE_MIPS        MIPS (BSD 4.3/System V mixture)
 *  __UTYPE_NETBSD      NetBSD
 *  __UTYPE_NEXT        NeXT
 *  __UTYPE_QNX         QNX
 *  __UTYPE_SCO         SCO Unix
 *  __UTYPE_IRIX        Silicon Graphics IRIX
 *  __UTYPE_SINIX       SINIX-N (Siemens-Nixdorf Unix)
 *  __UTYPE_SUNOS       SunOS
 *  __UTYPE_SUNSOLARIS  Sun Solaris
 *  __UTYPE_UNIXWARE    SCO UnixWare
 *                      ... these are the ones I know about so far.
 *  __UTYPE_GENERIC     Any other UNIX
 *
 *  When __VMS__ is defined, we may define one or more of these:
 *
 *  __VMS_XOPEN         Supports XOPEN functions
 */

#if (defined (__64BIT__))               /*  EDM 96/05/30                     */
#    define __IS_64BIT__                /*  May have 64-bit OS/compiler      */
#else
#    define __IS_32BIT__                /*  Else assume 32-bit OS/compiler   */
#endif

#if (defined WIN32 || defined (_WIN32))
#   undef __WINDOWS__
#   define __WINDOWS__
#   undef __MSDOS__
#   define __MSDOS__
#   undef UNIX                          /*  Some Win32 compilers like RSXNT  */
#   undef unix                          /*    define UNIX as well as Win32   */
#   undef __unix__                      /*    which causes problems...       */
#endif

#if (defined WINDOWS || defined (_WINDOWS) || defined (__WINDOWS__))
#   undef __WINDOWS__
#   define __WINDOWS__
#   undef __MSDOS__
#   define __MSDOS__
#endif

/*  MSDOS               Microsoft C                                          */
/*  _MSC_VER            Microsoft C                                          */
/*  __TURBOC__          Borland Turbo C                                      */
/*  __DJGPP__           D.J. Delorie's GNU C for DOS                         */
#if (defined (MSDOS) || defined (_MSC_VER) || defined (__TURBOC__) \
 || defined (__DJGPP__))
#   undef __MSDOS__
#   define __MSDOS__
#   if (defined (_DEBUG))
#       define DEBUG
#   endif
#endif

/*  EDM 96/05/28                                                             */
/*  __OS2__    Triggered by __EMX__ define and __i386__ define to avoid      */
/*             manual definition (eg, makefile) even though __EMX__ and      */
/*             __i386__ can be used on a MSDOS machine as well.  Here        */
/*             the same work is required at present.                         */
#if (defined (__EMX__) && defined (__i386__))
#   undef __OS2__
#   define __OS2__
#endif

/*  VMS                 VAX C (VAX/VMS)                                      */
/*  __VMS               Dec C (Alpha/OpenVMS)                                */
/*  __vax__             gcc                                                  */
#if (defined (VMS) || defined (__VMS) || defined (__vax__))
#   undef __VMS__
#   define __VMS__
#   if (__VMS_VER >= 70000000)
#       define __VMS_XOPEN
#   endif
#endif

/*  Try to define a __UTYPE_xxx symbol...                                    */
/*  unix                SunOS at least                                       */
/*  __unix__            gcc                                                  */
/*  _POSIX_SOURCE is various UNIX systems, maybe also VAX/VMS                */
#if (defined (unix) || defined (__unix__) || defined (_POSIX_SOURCE))
#   if (!defined (__VMS__))
#       undef __UNIX__
#       define __UNIX__
#       if (defined (__alpha))          /*  Digital UNIX is 64-bit           */
#           undef  __IS_32BIT__
#           define __IS_64BIT__
#           define __UTYPE_DECALPHA
#       endif
#   endif
#endif

#if (defined (_AUX))
#   define __UTYPE_AUX
#   define __UNIX__
#elif (defined (__BEOS__))
#   define __UTYPE_BEOS
#   define __UNIX__
#elif (defined (__hpux))
#   define __UTYPE_HPUX
#   define __UNIX__
#   define _INCLUDE_HPUX_SOURCE
#   define _INCLUDE_XOPEN_SOURCE
#   define _INCLUDE_POSIX_SOURCE
#elif (defined (_AIX) || defined (AIX))
#   define __UTYPE_IBMAIX
#   define __UNIX__
#elif (defined (BSD) || defined (bsd))
#   define __UTYPE_BSDOS
#   define __UNIX__
#elif (defined (linux))
#   define __UTYPE_LINUX
#   define __UNIX__
#   define __NO_CTYPE                   /*  Suppress warnings on tolower()   */
#elif (defined (Mips))
#   define __UTYPE_MIPS
#   define __UNIX__
#elif (defined (FreeBSD) || defined (__FreeBSD__))
#   define __UTYPE_FREEBSD
#   define __UNIX__
#elif (defined (NetBSD) || defined (__NetBSD__))
#   define __UTYPE_NETBSD
#   define __UNIX__
#elif (defined (NeXT))
#   define __UTYPE_NEXT
#   define __UNIX__
#elif (defined (__QNX__))
#   define __UTYPE_QNX
#   define __UNIX__
#elif (defined (sco))
#   define __UTYPE_SCO
#   define __UNIX__
#elif (defined (sgi))
#   define __UTYPE_IRIX
#   define __UNIX__
#elif (defined (sinix))
#   define __UTYPE_SINIX
#   define __UNIX__
#elif (defined (SOLARIS) || defined (__SRV4))
#   define __UTYPE_SUNSOLARIS
#   define __UNIX__
#elif (defined (SUNOS) || defined (SUN) || defined (sun))
#   define __UTYPE_SUNOS
#   define __UNIX__
#elif (defined (__USLC__) || defined (UnixWare))
#   define __UTYPE_UNIXWARE
#   define __UNIX__
#elif (defined (__DJGPP__))       /* DJGPP thinks it's running in Unix. heh. */
#   undef __UNIX__
#elif (defined __UNIX__)
#   define __UTYPE_GENERIC
#endif


/*- Standard ANSI include files ---------------------------------------------*/

#ifdef __cplusplus
#include <iostream.h>                   /*  A bit of support for C++         */
#endif

#include <ctype.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <float.h>
#include <math.h>
#include <signal.h>
#include <setjmp.h>


/*- System-specific include files -------------------------------------------*/

#if (defined (__MSDOS__))
#   if (defined (__WINDOWS__))          /*  When __WINDOWS__ is defined,     */
#       define FD_SETSIZE     1024      /*  Max. filehandles/sockets         */
#       include <windows.h>  
#       include <winsock.h>             /*  May cause trouble on VC 1.x      */
#       include <direct.h>   
#       include <process.h>   
#   endif
#   if (defined (__TURBOC__))
#       include <dir.h>
#       include <alloc.h>               /*  Okay for Turbo C                 */
#   else
#       include <malloc.h>              /*  But will it work for others?     */
#   endif
#   include <dos.h>
#   include <io.h>
#   include <fcntl.h>
#   include <sys\types.h>
#   include <sys\stat.h>
#endif

/*  These include files are for non-PC systems                               */

#if (defined (__UNIX__))
#   if defined (__GNUC__) && (__GNUC__ >= 2)
#       define __STRICT_ANSI__
#   endif
#   include <fcntl.h>
#   include <netdb.h>
#   include <unistd.h>
#   include <dirent.h>
#   include <pwd.h>
#   include <grp.h>
#   include <sys/types.h>
#   include <sys/param.h>
#   include <sys/socket.h>
#   include <sys/time.h>
#   include <sys/stat.h>
#   include <sys/ioctl.h>
#   include <sys/file.h>
#   include <sys/wait.h>
#   include <netinet/in.h>              /*  Must come before arpa/inet.h     */
#   if (!defined (__UTYPE_BEOS))
#       include <arpa/inet.h>
#       if (!defined (TCP_NODELAY))
#           include <netinet/tcp.h>
#       endif
#   endif
/*  Specific #include's for UNIX varieties                                   */
#   if (defined (__UTYPE_IBMAIX) || defined(__UTYPE_QNX))
#       include <sys/select.h>
#   endif
#endif

#if (defined (__VMS__))
#   if (!defined (vaxc))
#       include <fcntl.h>               /*  Not provided by Vax C            */
#   endif
#   include <netdb.h>
#   include <unistd.h>
#   include <unixio.h>
#   include <unixlib.h>
#   include <types.h>
#   include <file.h>
#   include <socket.h>
#   include <dirent.h>
#   include <time.h>
#   include <pwd.h>
#   include <stat.h>
#   include <in.h>
#   include <inet.h>
#endif

#if (defined (__OS2__))
/*  Include list for OS/2 updated by EDM 96/12/31
 *  NOTE: sys/types.h must go near the top of the list because some of the
 *        definitions in other include files rely on types defined there.
 */
#   include <sys/types.h>
#   include <fcntl.h>
#   include <malloc.h>
#   include <netdb.h>
#   include <unistd.h>
#   include <dirent.h>
#   include <pwd.h>
#   include <grp.h>
#   include <io.h>
#   include <process.h>
#   include <sys/param.h>
#   include <sys/socket.h>
#   include <sys/select.h>
#   include <sys/time.h>
#   include <sys/stat.h>
#   include <sys/ioctl.h>
#   include <sys/file.h>
#   include <sys/wait.h>
#   include <netinet/in.h>              /*  Must come before arpa/inet.h     */
#   include <arpa/inet.h>
#   if (!defined (TCP_NODELAY))
#       include <netinet/tcp.h>
#   endif
#endif

#if (defined (__DJGPP__))
#   include <unistd.h>
#   include <dirent.h>
#   include <pwd.h>
#   include <grp.h>
#   include <dir.h>
#   include <sys/types.h>
#   include <sys/param.h>