htutils.h

elinks下lynx是最重要的二个文本浏览器, 在linux下非常实用, lynx比elinks早的多, 目前好像停止开发, 这是lynx源代码

/*                                       Utility macros for the W3 code library
                                  MACROS FOR GENERAL USE

   See also: the system dependent file "www_tcp.h", which is included here.

 */

#ifndef NO_LYNX_TRACE
#define DEBUG   /* Turns on trace; turn off for smaller binary */
#endif

#ifndef HTUTILS_H
#define HTUTILS_H

#ifdef HAVE_CONFIG_H
#include <lynx_cfg.h>	/* generated by autoconf 'configure' script */

/* see AC_FUNC_ALLOCA macro */
#ifdef __GNUC__
# define alloca __builtin_alloca
#else
# ifdef _MSC_VER
#  include <malloc.h>
#  define alloca _alloca
# else
#  if HAVE_ALLOCA_H
#   include <alloca.h>
#  else
#   ifdef _AIX
 #pragma alloca
#   else
#    ifndef alloca /* predefined by HP cc +Olibcalls */
char *alloca ();
#    endif
#   endif
#  endif
# endif
#endif

#include <sys/types.h>
#include <stdio.h>

#else  /* HAVE_CONFIG_H */

#ifdef DJGPP
#include <sys/config.h>	/* pseudo-autoconf values for DJGPP libc/headers */
#define HAVE_TRUNCATE 1
#define HAVE_ALLOCA 1
#include <limits.h>
#endif /* DJGPP */

#include <stdio.h>

#define DONT_TRACK_INTERNAL_LINKS 1

/* Explicit system-configure */
#ifdef VMS
#define NO_SIZECHANGE
#if defined(VAXC) && !defined(__DECC)
#define NO_UNISTD_H	/* DEC C has unistd.h, but not VAX C */
#endif
#define NO_KEYPAD
#define NO_UTMP
#define NO_FILIO_H
#define NOUSERS
#define DISP_PARTIAL	/* experimental */
#endif

#if defined(__STDC__) || defined(VMS) || defined(_WINDOWS)
#define ANSI_VARARGS 1
#undef HAVE_STDARG_H
#define HAVE_STDARG_H 1
#endif

#if defined(VMS) || defined(_WINDOWS)
#define HAVE_STDLIB_H 1
#endif

/* Accommodate non-autoconf'd Makefile's (VMS, DJGPP, etc) */

#ifndef NO_ARPA_INET_H
#define HAVE_ARPA_INET_H 1
#endif

#ifndef NO_CBREAK
#define HAVE_CBREAK 1
#endif

#ifndef NO_CUSERID
#define HAVE_CUSERID 1
#endif

#ifndef NO_FILIO_H
#define HAVE_SYS_FILIO_H 1
#endif

#ifndef NO_GETCWD
#define HAVE_GETCWD 1
#endif

#ifndef USE_SLANG
#ifndef NO_KEYPAD
#define HAVE_KEYPAD 1
#endif
#ifndef NO_TTYTYPE
#define HAVE_TTYTYPE 1
#endif
#endif /* USE_SLANG */

#ifndef NO_PUTENV
#define HAVE_PUTENV 1
#endif

#ifndef NO_SIZECHANGE
#define HAVE_SIZECHANGE 1
#endif

#ifndef NO_UNISTD_H
#undef  HAVE_UNISTD_H
#define HAVE_UNISTD_H 1
#endif

#ifndef NO_UTMP
#define HAVE_UTMP 1
#endif

#endif /* HAVE_CONFIG_H */

#ifndef lynx_srand
#define lynx_srand srand
#endif

#ifndef lynx_rand
#define lynx_rand rand
#endif

#if '0' != 48
#define NOT_ASCII
#endif

#if '0' == 240
#define EBCDIC
#endif

#ifndef LY_MAXPATH
#define LY_MAXPATH 256
#endif

#ifndef	GCC_NORETURN
#define	GCC_NORETURN /* nothing */
#endif

#ifndef	GCC_UNUSED
#define	GCC_UNUSED /* nothing */
#endif

/* FIXME: need a configure-test */
#if defined(__STDC__) || defined(__DECC) || defined(_WINDOWS) || _WIN_CC
#define ANSI_PREPRO 1
#endif

#if defined(__CYGWIN32__) && ! defined(__CYGWIN__)
#define __CYGWIN__ 1
#endif

#if defined(__CYGWIN__)		/* 1998/12/31 (Thu) 16:13:46 */
#include <windows.h>		/* #include "windef.h" */
#define BOOLEAN_DEFINED
#undef HAVE_POPEN		/* FIXME: does this not work, or is it missing */
#undef small			/* see <w32api/rpcndr.h> */
#endif

/* cygwin, mingw32, etc. */
#ifdef FILE_DOES_NOT_EXIST
#undef FILE_DOES_NOT_EXIST	/* see <w32api/winnt.h> */
#endif

#if defined(_WINDOWS) && !defined(__CYGWIN__)	/* SCW */
#include <windows.h>		/* #include "windef.h" */
#define BOOLEAN_DEFINED
#if !_WIN_CC			/* 1999/09/29 (Wed) 22:00:53 */
#include <dos.h>
#endif
#undef sleep			/* 1998/06/23 (Tue) 16:54:53 */
extern void sleep(unsigned __seconds);
#define popen _popen
#define pclose _pclose

#if defined(_MSC_VER)
typedef unsigned short mode_t;
#endif

#endif /* _WINDOWS */

#ifndef USE_COLOR_STYLE
    /* it's useless for such setup */
#  define NO_EMPTY_HREFLESS_A
#endif

#if  defined(__EMX__) || defined(WIN_EX) || defined(HAVE_POPEN)
#  define CAN_CUT_AND_PASTE
#endif

#if defined(USE_SLANG) || (defined(USE_COLOR_STYLE) && defined(__EMX__))
#  define USE_BLINK
#endif

#if defined(DOSPATH) || defined(__EMX__)
#  define USE_DOS_DRIVES	/* we allow things like "c:" in paths */
#endif

#if defined(UNIX)
#  if (defined(__BEOS__) || defined(__CYGWIN__) || defined(__DJGPP__) || defined(__EMX__) || defined(__MINGW32__))
#    define SINGLE_USER_UNIX	/* well, at least they try */
#  else
#    define MULTI_USER_UNIX
#  endif
#endif

/*

  ERROR TYPE

   This is passed back when streams are aborted. It might be nice to have some structure
   of error messages, numbers, and recursive pointers to reasons.  Curently this is a
   placeholder for something more sophisticated.

 */
typedef void * HTError;                 /* Unused at present -- best definition? */

/*

Standard C library for malloc() etc

 */
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif

#ifndef EXIT_SUCCESS
#define EXIT_SUCCESS 0
#endif

#ifndef EXIT_FAILURE
#define EXIT_FAILURE 1
#endif

#ifdef __EMX__
#include <unistd.h> /* should be re-include protected under EMX */
#define getcwd _getcwd2
#define chdir _chdir2
#endif

#ifdef vax
#ifdef unix
#define ultrix  /* Assume vax+unix=ultrix */
#endif /* unix */
#endif /* vax */

#ifndef VMS
#ifndef ultrix

#ifdef NeXT
#include <libc.h>       /* NeXT */
#endif /* NeXT */

#else /* ultrix: */

#include <malloc.h>
#include <memory.h>

#endif /* !ultrix */
#else   /* VMS: */

#include <unixlib.h>
#if defined(VAXC) && !defined(__DECC)
#define malloc	VAXC$MALLOC_OPT
#define calloc	VAXC$CALLOC_OPT
#define free	VAXC$FREE_OPT
#define cfree	VAXC$CFREE_OPT
#define realloc	VAXC$REALLOC_OPT
#endif /* VAXC && !__DECC */

#endif /* !VMS */

/*

Macros for declarations

 */
#define PUBLIC                  /* Accessible outside this module     */
#define PRIVATE static          /* Accessible only within this module */

#if defined(__STDC__) || defined(__BORLANDC__) || defined(_MSC_VER)
#define CONST const             /* "const" only exists in STDC */
#define NOPARAMS (void)
#define PARAMS(parameter_list) parameter_list
#define NOARGS (void)
#define ARGS1(t,a) \
                (t a)
#define ARGS2(t,a,u,b) \
                (t a, u b)
#define ARGS3(t,a,u,b,v,c) \
                (t a, u b, v c)
#define ARGS4(t,a,u,b,v,c,w,d) \
                (t a, u b, v c, w d)
#define ARGS5(t,a,u,b,v,c,w,d,x,e) \
                (t a, u b, v c, w d, x e)
#define ARGS6(t,a,u,b,v,c,w,d,x,e,y,f) \
                (t a, u b, v c, w d, x e, y f)
#define ARGS7(t,a,u,b,v,c,w,d,x,e,y,f,z,g) \
                (t a, u b, v c, w d, x e, y f, z g)
#define ARGS8(t,a,u,b,v,c,w,d,x,e,y,f,z,g,s,h) \
                (t a, u b, v c, w d, x e, y f, z g, s h)
#define ARGS9(t,a,u,b,v,c,w,d,x,e,y,f,z,g,s,h,r,i) \
                (t a, u b, v c, w d, x e, y f, z g, s h, r i)
#define ARGS10(t,a,u,b,v,c,w,d,x,e,y,f,z,g,s,h,r,i,q,j) \
                (t a, u b, v c, w d, x e, y f, z g, s h, r i, q j)

#else  /* not ANSI */

#ifndef _WINDOWS
#define CONST
#endif
#define NOPARAMS ()
#define PARAMS(parameter_list) ()
#define NOARGS ()
#define ARGS1(t,a) (a) \
                t a;
#define ARGS2(t,a,u,b) (a,b) \
                t a; u b;
#define ARGS3(t,a,u,b,v,c) (a,b,c) \
                t a; u b; v c;
#define ARGS4(t,a,u,b,v,c,w,d) (a,b,c,d) \
                t a; u b; v c; w d;
#define ARGS5(t,a,u,b,v,c,w,d,x,e) (a,b,c,d,e) \
                t a; u b; v c; w d; x e;
#define ARGS6(t,a,u,b,v,c,w,d,x,e,y,f) (a,b,c,d,e,f) \
                t a; u b; v c; w d; x e; y f;
#define ARGS7(t,a,u,b,v,c,w,d,x,e,y,f,z,g) (a,b,c,d,e,f,g) \
                t a; u b; v c; w d; x e; y f; z g;
#define ARGS8(t,a,u,b,v,c,w,d,x,e,y,f,z,g,s,h) (a,b,c,d,e,f,g,h) \
                t a; u b; v c; w d; x e; y f; z g; s h;
#define ARGS9(t,a,u,b,v,c,w,d,x,e,y,f,z,g,s,h,r,i) (a,b,c,d,e,f,g,h,i) \
                t a; u b; v c; w d; x e; y f; z g; s h; r i;
#define ARGS10(t,a,u,b,v,c,w,d,x,e,y,f,z,g,s,h,r,i,q,j) (a,b,c,d,e,f,g,h,i,j) \