⟦307f08229⟧

TextFile

/* GNUPLOT - plot.h */
/*
 * Copyright (C) 1986, 1987, 1990   Thomas Williams, Colin Kelley
 *
 * Permission to use, copy, and distribute this software and its
 * documentation for any purpose with or without fee is hereby granted, 
 * provided that the above copyright notice appear in all copies and 
 * that both that copyright notice and this permission notice appear 
 * in supporting documentation.
 *
 * Permission to modify the software is granted, but not the right to
 * distribute the modified code.  Modifications are to be distributed 
 * as patches to released version.
 *  
 * This software  is provided "as is" without express or implied warranty.
 * 
 *
 * AUTHORS
 * 
 *   Original Software:
 *     Thomas Williams,  Colin Kelley.
 * 
 *   Gnuplot 2.0 additions:
 *       Russell Lang, Dave Kotz, John Campbell.
 * 
 * send your comments or suggestions to (pixar!info-gnuplot@sun.com).
 * 
 */


#define PROGRAM "G N U P L O T"
#define PROMPT "gnuplot> "
#define SHELL "/bin/sh"		/* used if SHELL env variable not set */

#define SAMPLES 160		/* default number of samples for a plot */
#define ZERO	1e-8		/* default for 'zero' set option */

#ifndef TERM
/* default terminal is "unknown"; but see init_terminal */
#define TERM "unknown"
#endif

#define TRUE 1
#define FALSE 0


#define Pi 3.141592653589793


#define MAX_POINTS 1
#define MAX_LINE_LEN 1024	/* maximum number of chars allowed on line */
#define MAX_TOKENS 200
#define MAX_ID_LEN 50		/* max length of an identifier */


#define MAX_AT_LEN 150		/* max number of entries in action table */
#define STACK_DEPTH 100
#define NO_CARET (-1)




#ifdef vms
#define OS "VMS "
#endif


#ifdef unix
#define OS "unix "
#endif


#ifdef MSDOS
#define OS "MS-DOS "
#endif


#ifndef OS
#define OS ""
#endif


/*
 * Note about VERYLARGE:  This is the upper bound double (or float, if PC)
 * numbers. This flag indicates very large numbers. It doesn't have to 
 * be the absolutely biggest number on the machine.  
 * If your machine doesn't have HUGE, or float.h,
 * define VERYLARGE here. 
 *
 * example:
#define VERYLARGE 1e38
 */

#ifdef PC
#include <float.h>
#define VERYLARGE FLT_MAX
#else
#ifdef vms
#include <float.h>
#define VERYLARGE DBL_MAX
#else
#define VERYLARGE HUGE
#endif
#endif


#define END_OF_COMMAND (c_token >= num_tokens || equals(c_token,";"))




#ifdef vms


#define is_comment(c) ((c) == '#' || (c) == '!')
#define is_system(c) ((c) == '$')


#else /* vms */


#define is_comment(c) ((c) == '#')
#define is_system(c) ((c) == '!')


#endif /* vms */


/*
 * If you're memcpy() has another name, define it below as bcopy() is.
 * If you don't have a memcpy():
#define NOCOPY
 */


#ifdef BCOPY
#define memcpy(dest,src,len) bcopy(src,dest,len)
#endif /* BCOPY */


#ifdef vms
#define memcpy(dest,src,len) lib$movc3(&len,src,dest)
#endif /* vms */


/*
 * If you don't have BZERO, define it below.
 */
#ifndef BZERO
#define bzero(dest,len)  (void)(memset(dest, (char)NULL, len))
#endif /* BZERO */


#define top_of_stack stack[s_p]


typedef int BOOLEAN;

#ifdef __ZTC__
typedef int (*FUNC_PTR)(...);
#else
typedef int (*FUNC_PTR)();
#endif


enum operators {
	PUSH, PUSHC, PUSHD, CALL, LNOT, BNOT, UMINUS, LOR, LAND, BOR, XOR,
	BAND, EQ, NE, GT, LT, GE, LE, PLUS, MINUS, MULT, DIV, MOD, POWER,
	FACTORIAL, BOOL, JUMP, JUMPZ, JUMPNZ, JTERN, SF_START
};


#define is_jump(operator) ((operator) >=(int)JUMP && (operator) <(int)SF_START)


enum DATA_TYPES {
	INT, CMPLX
};


enum PLOT_TYPE {
	FUNC, DATA
};


enum PLOT_STYLE {
	LINES, POINTS, IMPULSES, LINESPOINTS, DOTS
};

enum JUSTIFY {
	LEFT, CENTRE, RIGHT
};

struct cmplx {
	double real, imag;
};


struct value {
	enum DATA_TYPES type;
	union {
		int int_val;
		struct cmplx cmplx_val;
	} v;
};


struct lexical_unit {	/* produced by scanner */
	BOOLEAN is_token;	/* true if token, false if a value */ 
	struct value l_val;
	int start_index;	/* index of first char in token */
	int length;			/* length of token in chars */
};


struct ft_entry {		/* standard/internal function table entry */
	char *f_name;		/* pointer to name of this function */
	FUNC_PTR func;		/* address of function to call */
};


struct udft_entry {				/* user-defined function table entry */
	struct udft_entry *next_udf; /* pointer to next udf in linked list */
	char udf_name[MAX_ID_LEN+1]; /* name of this function entry */
	struct at_type *at;			/* pointer to action table to execute */
	char *definition; 			/* definition of function as typed */
	struct value dummy_value;	/* current value of dummy variable */
};


struct udvt_entry {			/* user-defined value table entry */
	struct udvt_entry *next_udv; /* pointer to next value in linked list */
	char udv_name[MAX_ID_LEN+1]; /* name of this value entry */
	BOOLEAN udv_undef;		/* true if not defined yet */
	struct value udv_value;	/* value it has */
};


union argument {			/* p-code argument */
	int j_arg;				/* offset for jump */
	struct value v_arg;		/* constant value */
	struct udvt_entry *udv_arg;	/* pointer to dummy variable */
	struct udft_entry *udf_arg; /* pointer to udf to execute */
};


struct at_entry {			/* action table entry */
	enum operators index;	/* index of p-code function */
	union argument arg;
};


struct at_type {
	int a_count;				/* count of entries in .actions[] */
	struct at_entry actions[MAX_AT_LEN];
		/* will usually be less than MAX_AT_LEN is malloc()'d copy */
};


/* Defines the type of a coordinate */
/* INRANGE and OUTRANGE points have an x,y point associated with them */
enum coord_type {
    INRANGE,				/* inside plot boundary */
    OUTRANGE,				/* outside plot boundary, but defined */
    UNDEFINED				/* not defined at all */
};

struct coordinate {
	enum coord_type type;	/* see above */
#ifdef PC
	float x, y;			/* memory is tight on PCs! */
#else
	double x, y;
#endif /* PC */
};


struct curve_points {
	struct curve_points *next_cp;	/* pointer to next plot in linked list */
	enum PLOT_TYPE plot_type;
	enum PLOT_STYLE plot_style;
	char *title;
	int line_type;
	int point_type;
	int p_count;					/* count of points in .points[] */
	struct coordinate points[MAX_POINTS];
		/* will usually be less in malloc()'d copy */
};


struct termentry {
	char *name;
	char *description;
	unsigned int xmax,ymax,v_char,h_char,v_tic,h_tic;
	FUNC_PTR init,reset,text,scale,graphics,move,vector,linetype,
		put_text,text_angle,justify_text,point,arrow;
};


struct text_label {
	struct text_label *next;	/* pointer to next label in linked list */
	int tag;				/* identifies the label */
	double x,y;
	enum JUSTIFY pos;
	char text[MAX_LINE_LEN+1];
};

struct arrow_def {
	struct arrow_def *next;	/* pointer to next arrow in linked list */
	int tag;				/* identifies the arrow */
	double sx,sy;			/* start position */
	double ex,ey;			/* end position */
};

/* Tic-mark labelling definition; see set xtics */
struct ticdef {
    int type;				/* one of three values below */
#define TIC_COMPUTED 1		/* default; gnuplot figures them */
#define TIC_SERIES 2		/* user-defined series */
#define TIC_USER 3			/* user-defined points */
    union {
	   struct {			/* for TIC_SERIES */
		  double start, incr;
		  double end;		/* ymax, if VERYLARGE */
	   } series;
	   struct ticmark *user;	/* for TIC_USER */
    } def;
};

/* Defines one ticmark for TIC_USER style.
 * If label==NULL, the value is printed with the usual format string.
 * else, it is used as the format string (note that it may be a constant
 * string, like "high" or "low").
 */
struct ticmark {
    double position;		/* where on axis is this */
    char *label;			/* optional (format) string label */
    struct ticmark *next;	/* linked list */
};

/*
 * SS$_NORMAL is "normal completion", STS$M_INHIB_MSG supresses

 * printing a status message.
 * SS$_ABORT is the general abort status code.
 from:	Martin Minow
	decvax!minow
 */
#ifdef	vms
#include		<ssdef.h>
#include		<stsdef.h>
#define	IO_SUCCESS	(SS$_NORMAL | STS$M_INHIB_MSG)
#define	IO_ERROR	SS$_ABORT
#endif /* vms */


#ifndef	IO_SUCCESS	/* DECUS or VMS C will have defined these already */
#define	IO_SUCCESS	0
#endif
#ifndef	IO_ERROR
#define	IO_ERROR	1
#endif

/* Some key global variables */
extern BOOLEAN screen_ok;
extern BOOLEAN term_init;
extern BOOLEAN undefined;
extern struct termentry term_tbl[];

extern char *alloc();
DataMuseum.dk

DKUUG/EUUG Conference tapes

⟦307f08229⟧ TextFile

Derivation

TextFile
