/* FRACTINT.H - common structures and values for the FRACTINT routines */

#ifndef FRACTINT_H
#define FRACTINT_H

#include <math.h>
#ifndef PORT_H
#include "port.h"
#endif
#ifndef BIGNUM_DEFINED
#include "bignum.h"
#include "bigflt.h"
#endif

typedef BYTE BOOLEAN;

#ifndef C6
#define _fastcall	/* _fastcall is a Microsoft C6.00 extension */
#endif

#ifndef XFRACT
#define ftimex ftime
typedef int SEGTYPE;
typedef unsigned USEGTYPE;
#ifdef __TURBOC__
#   define _bios_printer(a,b,c)   biosprint((a),(c),(b))
#   define _bios_serialcom(a,b,c) bioscom((a),(c),(b))
#else
#ifndef __WATCOMC__
#ifndef MK_FP
#   define MK_FP(seg,off) (VOIDFARPTR )( (((long)(seg))<<16) | \
                                          ((unsigned)(off)) )
#endif
#endif
#endif
#else
typedef char * SEGTYPE;
typedef char * USEGTYPE;
#   define MK_FP(seg,off) (VOIDFARPTR )(seg+off)
#include <sys/types.h> /* need size_t */
#endif


#ifndef XFRACT
#define clock_ticks() clock()
#endif

#ifdef XFRACT
#define _fstrcpy(to,from) strcpy(to,from)
#define _fmemmove(a,b,c) (bn_t)memmove(a,b,c)
#define _fmemset(a,b,c) (bn_t)memset(a,b,c)
#define _fmemcpy(a,b,c) (bn_t)memcpy(a,b,c)
#define difftime(now,then) ((now)-(then))
#endif

/* for gotos in former FRACTINT.C pieces */
#define RESTART           1
#define IMAGESTART        2
#define RESTORESTART      3
#define CONTINUE          4

/* these are used to declare arrays for file names */
#define FILE_MAX_PATH  80       /* max length of path+filename  */
#define FILE_MAX_DIR   80       /* max length of directory name */
#define FILE_MAX_DRIVE  3       /* max length of drive letter   */
#ifndef XFRACT
#define FILE_MAX_FNAME  9       /* max length of filename       */
#define FILE_MAX_EXT    5       /* max length of extension      */
#else
#define FILE_MAX_FNAME  64       /* max length of filename       */
#define FILE_MAX_EXT    64       /* max length of extension      */
#endif

#define MAXPARAMS 10		/* maximum number of parameters */
#define MAXPIXELS 2048		/* Maximum pixel count across/down the screen */
#define DEFAULTASPECT ((float)0.75)/* Assumed overall screen dimensions, y/x  */
#define DEFAULTASPECTDRIFT ((float)0.02) /* drift of < 2% is forced to 0% */

struct videoinfo {		/* All we need to know about a Video Adapter */
	char	name[26];	/* Adapter name (IBM EGA, etc)		*/
	char	comment[26];	/* Comments (UNTESTED, etc)		*/
	int	keynum; 	/* key number used to invoked this mode */
				/* 2-10 = F2-10, 11-40 = S,C,A{F1-F10}	*/
	int	videomodeax;	/* begin with INT 10H, AX=(this)	*/
	int	videomodebx;	/*		...and BX=(this)	*/
	int	videomodecx;	/*		...and CX=(this)	*/
	int	videomodedx;	/*		...and DX=(this)	*/
				/* NOTE:  IF AX==BX==CX==0, SEE BELOW	*/
	int	dotmode;	/* video access method used by asm code */
				/*	1 == BIOS 10H, AH=12,13 (SLOW)	*/
				/*	2 == access like EGA/VGA	*/
				/*	3 == access like MCGA		*/
				/*	4 == Tseng-like  SuperVGA*256	*/
				/*	5 == P'dise-like SuperVGA*256   */
				/*	6 == Vega-like	 SuperVGA*256	*/
				/*	7 == "Tweaked" IBM-VGA ...*256  */
				/*	8 == "Tweaked" SuperVGA ...*256 */
				/*	9 == Targa Format		*/
				/*	10 = Hercules			*/
				/*	11 = "disk video" (no screen)   */
				/*	12 = 8514/A			*/
				/*	13 = CGA 320x200x4, 640x200x2	*/
				/*	14 = Tandy 1000 		*/
				/*	15 = TRIDENT  SuperVGA*256	*/
				/*	16 = Chips&Tech SuperVGA*256	*/
	int	xdots;		/* number of dots across the screen	*/
	int	ydots;		/* number of dots down the screen	*/
	int	colors; 	/* number of colors available		*/
	};

typedef struct videoinfo far        VIDEOINFO;
#define INFO_ID 	"Fractal"
typedef    struct fractal_info FRACTAL_INFO;

/*
 * Note: because non-MSDOS machines store structures differently, we have
 * to do special processing of the fractal_info structure in loadfile.c.
 * Make sure changes to the structure here get reflected there.
 */
#ifndef XFRACT
#define FRACTAL_INFO_SIZE sizeof(FRACTAL_INFO)
#else
/* This value should be the MSDOS size, not the Unix size. */
#define FRACTAL_INFO_SIZE 504
#endif

struct fractal_info	    /*  for saving data in GIF file     */
{
    char  info_id[8];	    /* Unique identifier for info block */
    short iterationsold;    /* Pre version 18.24 */
    short fractal_type;	    /* 0=Mandelbrot 1=Julia 2= ... */
    double xmin;
    double xmax;
    double ymin;
    double ymax;
    double creal;
    double cimag;
    short videomodeax;
    short videomodebx;
    short videomodecx;
    short videomodedx;
    short dotmode;
    short xdots;
    short ydots;
    short colors;
    short version;	    /* used to be 'future[0]' */
    float parm3;
    float parm4;
    float potential[3];
    short rseed;
    short rflag;
    short biomorph;
    short inside;
    short logmap;
    float invert[3];
    short decomp[2];
    short symmetry;
			/* version 2 stuff */
    short init3d[16];
    short previewfactor;
    short xtrans;
    short ytrans;
    short red_crop_left;
    short red_crop_right;
    short blue_crop_left;
    short blue_crop_right;
    short red_bright;
    short blue_bright;
    short xadjust;
    short eyeseparation;
    short glassestype;
			/* version 3 stuff, release 13 */
    short outside;
			/* version 4 stuff, release 14 */
    double x3rd;	  /* 3rd corner */
    double y3rd;
    char stdcalcmode;	  /* 1/2/g/b */
    char useinitorbit;	  /* init Mandelbrot orbit flag */
    short calc_status;	  /* resumable, finished, etc */
    long tot_extend_len;  /* total length of extension blocks in .gif file */
    short distest;
    short floatflag;
    short bailoutold;
    long calctime;
    BYTE trigndx[4];      /* which trig functions selected */
    short finattract;
    double initorbit[2];  /* init Mandelbrot orbit values */
    short periodicity;	  /* periodicity checking */
			/* version 5 stuff, release 15 */
    short pot16bit;	  /* save 16 bit continuous potential info */
    float faspectratio;   /* finalaspectratio, y/x */
    short system; 	  /* 0 for dos, 1 for windows */
    short release;	  /* release number, with 2 decimals implied */
    short flag3d; 	  /* stored only for now, for future use */
    short transparent[2];
    short ambient;
    short haze;
    short randomize;
			/* version 6 stuff, release 15.x */
    short rotate_lo;
    short rotate_hi;
    short distestwidth;
			/* version 7 stuff, release 16 */
    double dparm3;
    double dparm4;
			/* version 8 stuff, release 17 */
    short fillcolor;
			/* version 9 stuff, release 18 */
    double mxmaxfp;
    double mxminfp;
    double mymaxfp;
    double myminfp;
    short zdots;
    float originfp;
    float depthfp;
    float heightfp;
    float widthfp;
    float distfp;
    float eyesfp;
    short orbittype;
    short juli3Dmode;
    short maxfn;
    short inversejulia;
    double dparm5;
    double dparm6;
    double dparm7;
    double dparm8;
    double dparm9;
    double dparm10;
			/* version 10 stuff, release 19 */
    long bailout;
    short bailoutest;
    long iterations;
    short bf_math;
    short bflength;
    short yadjust;        /* yikes! we left this out ages ago! */
    short old_demm_colors;
    short future[42];	  /* for stuff we haven't thought of yet */
};

#define ITEMNAMELEN 18	 /* max length of names in .frm/.l/.ifs/.fc */
struct history_info	
{
    short fractal_type;
    double xmin;
    double xmax;
    double ymin;
    double ymax;
    double creal;
    double cimag;
    double potential[3];
    short rseed;
    short rflag;
    short biomorph;
    short inside;
    short logmap;
    double invert[3];
    short decomp;
    short symmetry;
    short init3d[16];
    short previewfactor;
    short xtrans;
    short ytrans;
    short red_crop_left;
    short red_crop_right;
    short blue_crop_left;
    short blue_crop_right;
    short red_bright;
    short blue_bright;
    short xadjust;
    short eyeseparation;
    short glassestype;
    short outside;
    double x3rd;	  
    double y3rd;
    char stdcalcmode;
    char three_pass;
    char useinitorbit;	  
    short distest;
    short bailoutold;
    BYTE trigndx[4];      
    short finattract;
    double initorbit[2];  
    short periodicity;	  
    short pot16bit;	  
    short release;
    short save_release;
    short flag3d; 
    short transparent[2];
    short ambient;
    short haze;
    short randomize;
    short rotate_lo;
    short rotate_hi;
    short distestwidth;
    double dparm3;
    double dparm4;
    short fillcolor;
    double mxmaxfp;
    double mxminfp;
    double mymaxfp;
    double myminfp;
    short zdots;
    float originfp;
    float depthfp;
    float heightfp;
    float widthfp;
    float distfp;
    float eyesfp;
    short orbittype;
    short juli3Dmode;
    char  maxfn;
    short major_method;
    short minor_method;
    double dparm5;
    double dparm6;
    double dparm7;
    double dparm8;
    double dparm9;
    double dparm10;
    long bailout;
    short bailoutest;
    long iterations;
    short bf_math;
    short bflength;
    short yadjust;
    short old_demm_colors;
    char filename[80];
    char itemname[ITEMNAMELEN+1];
    unsigned char dac[256][3];
};

typedef struct history_info HISTORY;

#define MAXVIDEOMODES 300	/* maximum entries in fractint.cfg	  */
#ifndef XFRACT
#define MAXVIDEOTABLE 40        /* size of the resident video modes table */
#else
#define MAXVIDEOTABLE 2         /* size of the resident video modes table */
#endif

#define AUTOINVERT -123456.789
#define ENDVID 22400   /* video table uses extra seg up to here */

#define N_ATTR 8			/* max number of attractors	*/

extern	long	 l_at_rad;	/* finite attractor radius  */
extern	double	 f_at_rad;	/* finite attractor radius  */

#define NUMIFS	  64	 /* number of ifs functions in ifs array */
#define IFSPARM    7	 /* number of ifs parameters */
#define IFS3DPARM 13	 /* number of ifs 3D parameters */

struct moreparams
{
   int      type;                    	/* index in fractalname of the fractal */
   char     *param[MAXPARAMS-4];	/* name of the parameters */
   double   paramvalue[MAXPARAMS-4]; 	/* default parameter values */
};

typedef struct moreparams far       MOREPARAMS;

struct fractalspecificstuff
{
   char  *name; 			/* name of the fractal */
					/* (leading "*" supresses name display) */ 
   char  *param[4];			/* name of the parameters */
   double paramvalue[4]; 		/* default parameter values */
   int	 helptext;			/* helpdefs.h HT_xxxx, -1 for none */
   int	 helpformula;			/* helpdefs.h HF_xxxx, -1 for none */
   unsigned flags; 			/* constraints, bits defined below */
   float xmin;				/* default XMIN corner */
   float xmax;				/* default XMAX corner */
   float ymin;				/* default YMIN corner */
   float ymax;				/* default YMAX corner */
   int	 isinteger;			/* 1 if integerfractal, 0 otherwise */
   int	 tojulia;			/* mandel-to-julia switch */
   int	 tomandel;			/* julia-to-mandel switch */
   int	 tofloat;			/* integer-to-floating switch */
   int	 symmetry;			/* applicable symmetry logic
					   0 = no symmetry
					  -1 = y-axis symmetry (If No Params)
					   1 = y-axis symmetry
					  -2 = x-axis symmetry (No Parms)
					   2 = x-axis symmetry
					  -3 = y-axis AND x-axis (No Parms)
					   3 = y-axis AND x-axis symmetry
					  -4 = polar symmetry (No Parms)
					   4 = polar symmetry
					   5 = PI (sin/cos) symmetry
					   6 = NEWTON (power) symmetry
								*/
#ifdef XFRACT
   int (*orbitcalc)();	/* function that calculates one orbit */
#else
   int (*orbitcalc)(void);	/* function that calculates one orbit */
#endif
   int (*per_pixel)(void);	/* once-per-pixel init */
   int (*per_image)(void);	/* once-per-image setup */
   int (*calctype)(void);	/* name of main fractal function */
   int orbit_bailout;		/* usual bailout value for orbit calc */
};

struct alternatemathstuff
{
   int type;			/* index in fractalname of the fractal */
   int math; 			/* kind of math used */
#ifdef XFRACT
   int (*orbitcalc)();	/* function that calculates one orbit */
#else
   int (*orbitcalc)(void);	/* function that calculates one orbit */
#endif
   int (*per_pixel)(void);	/* once-per-pixel init */
   int (*per_image)(void);	/* once-per-image setup */
};

typedef struct alternatemathstuff ALTERNATE;

/* defines for symmetry */
#define  NOSYM		0
#define  XAXIS_NOPARM  -1
#define  XAXIS		1
#define  YAXIS_NOPARM  -2
#define  YAXIS		2
#define  XYAXIS_NOPARM -3
#define  XYAXIS 	3
#define  ORIGIN_NOPARM -4
#define  ORIGIN 	4
#define  PI_SYM_NOPARM -5
#define  PI_SYM 	5
#define  XAXIS_NOIMAG  -6
#define  XAXIS_NOREAL	6
#define  NOPLOT        99
#define  SETUP_SYM    100

/* defines for inside/outside */
#define ITER        -1
#define REAL        -2
#define IMAG        -3
#define MULT        -4
#define SUM         -5
#define ATAN        -6
#define ZMAG       -59
#define BOF60      -60
#define BOF61      -61
#define EPSCROSS  -100
#define STARTRAIL -101
#define PERIOD    -102

/* defines for bailoutest */
enum bailouts { Mod, Real, Imag, Or, And };
enum Major  {breadth_first, depth_first, random_walk, random_run};
enum Minor  {left_first, right_first};

/* bitmask defines for fractalspecific flags */
#define  NOZOOM 	1    /* zoombox not allowed at all          */
#define  NOGUESS	2    /* solid guessing not allowed          */
#define  NOTRACE	4    /* boundary tracing not allowed        */
#define  NOROTATE	8    /* zoombox rotate/stretch not allowed  */
#define  NORESUME      16    /* can't interrupt and resume          */
#define  INFCALC       32    /* this type calculates forever        */
#define  TRIG1	       64    /* number of trig functions in formula */
#define  TRIG2	      128
#define  TRIG3	      192
#define  TRIG4	      256
#define  WINFRAC      512    /* supported in WinFrac                */
#define  PARMS3D     1024    /* uses 3d parameters                  */
#define  OKJB        2048    /* works with Julibrot                 */
#define  MORE        4096    /* more than 4 parms                   */
#define  BAILTEST    8192    /* can use different bailout tests     */
#define  BF_MATH    16384    /* supports arbitrary precision        */
#define  LD_MATH    32768    /* supports long double                */

extern struct fractalspecificstuff far fractalspecific[];
extern struct fractalspecificstuff far *curfractalspecific;

#define DEFAULTFRACTALTYPE	".gif"
#define ALTERNATEFRACTALTYPE	".fra"

#ifndef _CMPLX_DEFINED
#include "cmplx.h"
#endif

#ifndef sqr
#define sqr(x) ((x)*(x))
#endif

#ifndef lsqr
#define lsqr(x) (multiply((x),(x),bitshift))
#endif

#define CMPLXmod(z)	  (sqr((z).x)+sqr((z).y))
#define CMPLXconj(z)	((z).y =  -((z).y))
#define LCMPLXmod(z)	   (lsqr((z).x)+lsqr((z).y))
#define LCMPLXconj(z)	((z).y =  -((z).y))

typedef  _LCMPLX LCMPLX;

/* 3D stuff - formerly in 3d.h */
#ifndef dot_product
#define dot_product(v1,v2)  ((v1)[0]*(v2)[0]+(v1)[1]*(v2)[1]+(v1)[2]*(v2)[2])  /* TW 7-09-89 */
#endif

#define    CMAX    4   /* maximum column (4 x 4 matrix) */
#define    RMAX    4   /* maximum row	 (4 x 4 matrix) */
#define    DIM	   3   /* number of dimensions */

typedef double MATRIX [RMAX] [CMAX];  /* matrix of doubles */
typedef int   IMATRIX [RMAX] [CMAX];  /* matrix of ints    */
typedef long  LMATRIX [RMAX] [CMAX];  /* matrix of longs   */

/* A MATRIX is used to describe a transformation from one coordinate
system to another.  Multiple transformations may be concatenated by
multiplying their transformation matrices. */

typedef double VECTOR [DIM];  /* vector of doubles */
typedef int   IVECTOR [DIM];  /* vector of ints    */
typedef long  LVECTOR [DIM];  /* vector of longs   */

/* A VECTOR is an array of three coordinates [x,y,z] representing magnitude
and direction. A fourth dimension is assumed to always have the value 1, but
is not in the data structure */


#define PI 3.14159265358979323846

#define SPHERE	  init3d[0]		/* sphere? 1 = yes, 0 = no  */
#define ILLUMINE  (FILLTYPE>4)	/* illumination model	    */

/* regular 3D */
#define XROT	  init3d[1]	/* rotate x-axis 60 degrees */
#define YROT	  init3d[2]	/* rotate y-axis 90 degrees */
#define ZROT	  init3d[3]	/* rotate x-axis  0 degrees */
#define XSCALE	  init3d[4]	/* scale x-axis, 90 percent */
#define YSCALE	  init3d[5]	/* scale y-axis, 90 percent */

/* sphere 3D */
#define PHI1	  init3d[1]	/* longitude start, 180     */
#define PHI2	  init3d[2]	/* longitude end ,   0	    */
#define THETA1	  init3d[3]	    /* latitude start,-90 degrees */
#define THETA2	  init3d[4]	    /* latitude stop,  90 degrees */
#define RADIUS	  init3d[5]	/* should be user input */

/* common parameters */
#define ROUGH	  init3d[6]	/* scale z-axis, 30 percent */
#define WATERLINE init3d[7]	/* water level		    */
#define FILLTYPE  init3d[8]	/* fill type		    */
#define ZVIEWER   init3d[9]	/* perspective view point   */
#define XSHIFT	  init3d[10]	/* x shift */
#define YSHIFT	  init3d[11]	/* y shift */
#define XLIGHT	  init3d[12]	/* x light vector coordinate */
#define YLIGHT	  init3d[13]	/* y light vector coordinate */
#define ZLIGHT	  init3d[14]	/* z light vector coordinate */
#define LIGHTAVG  init3d[15]	/* number of points to average */

#ifndef TRUE
#define TRUE 1
#define FALSE 0
#endif

/* Math definitions (normally in float.h) that are missing on some systems. */
#ifndef FLT_MIN
#define FLT_MIN 1.17549435e-38
#endif
#ifndef FLT_MAX
#define FLT_MAX 3.40282347e+38
#endif
#ifndef DBL_EPSILON
#define DBL_EPSILON 2.2204460492503131e-16
#endif

/* gcc doesn't like the real DBL_MAX for some reason */
#ifdef XFRACT
#ifdef DBL_MAX
#undef DBL_MAX
#define DBL_MAX 1.79769313486231e+308
#endif
#endif

#ifndef XFRACT
#define UPARR "\x18"
#define DNARR "\x19"
#define RTARR "\x1A"
#define LTARR "\x1B"
#else
#define UPARR "K"
#define DNARR "J"
#define RTARR "L"
#define LTARR "H"
#endif

#define JIIM  0
#define ORBIT 1

struct workliststuff	/* work list entry for std escape time engines */
{
	int xxstart;	/* screen window for this entry */
	int xxstop;
	int yystart;
	int yystop;
	int yybegin;	/* start row within window, for 2pass/ssg resume */
	int sym;	/* if symmetry in window, prevents bad combines */
	int pass;	/* for 2pass and solid guessing */
};

typedef struct workliststuff        WORKLIST;


#define MAXCALCWORK 12

struct coords {
    int x,y;
    };

struct dblcoords {
    double x,y;
    };

extern BYTE trigndx[];
extern void (*ltrig0)(void), (*ltrig1)(void), (*ltrig2)(void), (*ltrig3)(void);
extern void (*dtrig0)(void), (*dtrig1)(void), (*dtrig2)(void), (*dtrig3)(void);

struct trig_funct_lst
{
    char *name;
    void (*lfunct)(void);
    void (*dfunct)(void);
    void (*mfunct)(void);
} ;
extern struct trig_funct_lst trigfn[];

/* function prototypes */

extern	void   (_fastcall *plot)(int, int, int);

/* for overlay return stack */

#define BIG 100000.0

#define CTL(x) ((x)&0x1f)

/* nonalpha tests if we have a control character */
#define nonalpha(c) ((c)<32 || (c)>127)

/* keys */
#define   INSERT	 1082
#define   DELETE	 1083
#define   PAGE_UP	 1073
#define   PAGE_DOWN	 1081
#define   CTL_HOME	 1119
#define   CTL_END	 1117
#define   LEFT_ARROW	 1075
#define   RIGHT_ARROW	 1077
#define   UP_ARROW	 1072
#define   DOWN_ARROW	 1080
#define   LEFT_ARROW_2	 1115
#define   RIGHT_ARROW_2  1116
#define   UP_ARROW_2	 1141
#define   DOWN_ARROW_2	 1145
#define   HOME		 1071
#define   END		 1079
#define   ENTER 	 13
#define   ENTER_2	 1013
#define   CTL_ENTER      10
#define   CTL_ENTER_2    1010
#define   CTL_PAGE_UP    1132
#define   CTL_PAGE_DOWN  1118
#define   CTL_MINUS      1142
#define   CTL_PLUS       1144
#define   CTL_INSERT     1146
#define   CTL_DEL        1147
#define   CTL_BACKSLASH  28
#define   F1		 1059
#define   F2		 1060
#define   F3		 1061
#define   F4		 1062
#define   F5		 1063
#define   F6		 1064
#define   F7		 1065
#define   F8		 1066
#define   F9		 1067
#define   F10		 1068
#define   BACKSPACE	 8
#define   TAB            9
#define   CTL_TAB        1148
#define   ALT_TAB        1165
#define   BACK_TAB	 1015  /* shift tab */
#define   ESC            27
#define   SPACE          32
#define   SF1            1084
#define   SF2            1085
#define   SF3            1086
#define   SF4            1087
#define   SF5            1088
#define   SF6            1089
#define   SF7            1090
#define   SF8            1091
#define   SF9            1092
#define   SF10           1093
/* text colors */
#define BLACK	   0
#define BLUE	   1
#define GREEN	   2
#define CYAN	   3
#define RED	   4
#define MAGENTA    5
#define BROWN	   6 /* dirty yellow on cga */
#define WHITE	   7
/* use values below this for foreground only, they don't work background */
#define GRAY	   8 /* don't use this much - is black on cga */
#define L_BLUE	   9
#define L_GREEN   10
#define L_CYAN	  11
#define L_RED	  12
#define L_MAGENTA 13
#define YELLOW	  14
#define L_WHITE   15
#define INVERSE 0x8000 /* when 640x200x2 text or mode 7, inverse */
#define BRIGHT	0x4000 /* when mode 7, bright */
/* and their use: */
extern BYTE txtcolor[];
#define C_TITLE 	  txtcolor[0]+BRIGHT
#define C_TITLE_DEV	  txtcolor[1]
#define C_HELP_HDG	  txtcolor[2]+BRIGHT
#define C_HELP_BODY	  txtcolor[3]
#define C_HELP_INSTR	  txtcolor[4]
#define C_HELP_LINK	  txtcolor[5]+BRIGHT
#define C_HELP_CURLINK	  txtcolor[6]+INVERSE
#define C_PROMPT_BKGRD	  txtcolor[7]
#define C_PROMPT_TEXT	  txtcolor[8]
#define C_PROMPT_LO	  txtcolor[9]
#define C_PROMPT_MED	  txtcolor[10]
#ifndef XFRACT
#define C_PROMPT_HI	  txtcolor[11]+BRIGHT
#else
#define C_PROMPT_HI	  txtcolor[11]
#endif
#define C_PROMPT_INPUT	  txtcolor[12]+INVERSE
#define C_PROMPT_CHOOSE   txtcolor[13]+INVERSE
#define C_CHOICE_CURRENT  txtcolor[14]+INVERSE
#define C_CHOICE_SP_INSTR txtcolor[15]
#define C_CHOICE_SP_KEYIN txtcolor[16]+BRIGHT
#define C_GENERAL_HI	  txtcolor[17]+BRIGHT
#define C_GENERAL_MED	  txtcolor[18]
#define C_GENERAL_LO	  txtcolor[19]
#define C_GENERAL_INPUT   txtcolor[20]+INVERSE
#define C_DVID_BKGRD	  txtcolor[21]
#define C_DVID_HI	  txtcolor[22]+BRIGHT
#define C_DVID_LO	  txtcolor[23]
#define C_STOP_ERR	  txtcolor[24]+BRIGHT
#define C_STOP_INFO	  txtcolor[25]+BRIGHT
#define C_TITLE_LOW	  txtcolor[26]
#define C_AUTHDIV1	  txtcolor[27]+INVERSE
#define C_AUTHDIV2	  txtcolor[28]+INVERSE
#define C_PRIMARY	  txtcolor[29]
#define C_CONTRIB	  txtcolor[30]

/* structure for xmmmoveextended parameter */
struct XMM_Move
  {
    unsigned long   Length;
    unsigned int    SourceHandle;
    unsigned long   SourceOffset;
    unsigned int    DestHandle;
    unsigned long   DestOffset;
  };

/* structure passed to fullscreen_prompts */
struct fullscreenvalues
{
   int type;   /* 'd' for double, 'f' for float, 's' for string,   */
	       /* 'D' for integer in double, '*' for comment */
	       /* 'i' for integer, 'y' for yes=1 no=0              */
	       /* 0x100+n for string of length n		   */
	       /* 'l' for one of a list of strings                 */
	       /* 'L' for long */
   union
   {
      double dval;	/* when type 'd' or 'f'  */
      int    ival;	/* when type is 'i'      */
      long   Lval;	/* when type is 'L'      */
      char   sval[16];	/* when type is 's'      */
      char  far *sbuf;	/* when type is 0x100+n  */
      struct {		/* when type is 'l'      */
	 int  val;	/*   selected choice	 */
	 int  vlen;	/*   char len per choice */
	 char **list;	/*   list of values	 */
	 int  llen;	/*   number of values	 */
      } ch;
   } uval;
};

#define   FILEATTR	 0x37	   /* File attributes; select all but volume labels */
#define   HIDDEN	 2
#define   SYSTEM	 4
#define   SUBDIR	 16

struct DIR_SEARCH		/* Allocate DTA and define structure */
{
     char path[21];		/* DOS path and filespec */
     char attribute;		/* File attributes wanted */
     int  ftime;		/* File creation time */
     int  fdate;		/* File creation date */
     long size; 		/* File size in bytes */
     char filename[13]; 	/* Filename and extension */
};

extern struct DIR_SEARCH DTA;   /* Disk Transfer Area */

typedef struct palett
{
   BYTE red;
   BYTE green;
   BYTE blue;
}
Palettetype;

struct ext_blk_2 {
   char got_data;
   int length;
   char far *resume_data;
   };

struct ext_blk_3 {
   char got_data;
   char form_name[40];
   };

struct ext_blk_4 {
   char got_data;
   int length;
   int far *range_data;
   };

struct ext_blk_5 {
   char got_data;
   int length;
   char far *apm_data;
   };

struct affine
{
   /* weird order so a,b,e and c,d,f are vectors */
   double a;
   double b;
   double e;
   double c;
   double d;
   double f;
};

#define sign(x) (((x) < 0) ? -1 : ((x) != 0)  ? 1 : 0)

#if (_MSC_VER >= 700)
typedef char __based(__segname("_CODE")) FCODE;
#else
typedef char far FCODE;
#endif

#if (_MSC_VER >= 700)
typedef BYTE __based(__segname("_CODE")) BFCODE;
#else
typedef BYTE far BFCODE;
#endif

#if (_MSC_VER >= 700)
typedef int __based(__segname("_CODE")) IFCODE;
#else
typedef int far IFCODE;
#endif

#if (_MSC_VER >= 700)
typedef unsigned int __based(__segname("_CODE")) UIFCODE;
#else
typedef unsigned int far UIFCODE;
#endif

#if (_MSC_VER >= 700)
typedef long __based(__segname("_CODE")) LFCODE;
#else
typedef long far LFCODE;
#endif

#if (_MSC_VER >= 700)
typedef double __based(__segname("_CODE")) DFCODE;
#else
typedef double far DFCODE;
#endif
#endif

#if _MSC_VER == 800 
#ifndef FIXTAN_DEFINED
/* !!!!! stupid MSVC tan(x) bug fix !!!!!!!!            */
/* tan(x) can return -tan(x) if -pi/2 < x < pi/2       */
/* if tan(x) has been called before outside this range. */
double fixtan( double x );
#define tan fixtan
#define FIXTAN_DEFINED
#endif
#endif
