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/* RCSid: $Id: mgvars.h,v 1.2 2003/07/14 22:24:00 schorsch Exp $ */
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/*
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* mgvars.h - header file for graphing routines using variables.
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*
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* 6/23/86
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*
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* Greg Ward Larson
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*/
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#ifndef _RAD_MGVARS_H_
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#define _RAD_MGVARS_H_
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#include <errno.h>
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#include "calcomp.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Data arrays are used to store point data.
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*/
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typedef struct {
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int size; /* the size of the array */
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float *data; /* pointer to the array */
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} DARRAY;
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/*
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* Intermediate variables are not referenced
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* directly by the program, but may be used
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* for defining other variables.
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*/
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typedef struct ivar {
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char *name; /* the variable name */
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char *dfn; /* its definition */
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struct ivar *next; /* next in list */
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} IVAR; /* an intermediate variable */
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/*
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* Variables are used for all graph parameters. The four variable
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* types are: REAL, FUNCTION, STRING and DATA.
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* Of these, only STRING and DATA must be interpreted by us; an
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* expression parser will handle the rest.
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*/
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/* standard variables */
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#define FTHICK 0 /* frame thickness */
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#define GRID 1 /* grid on? */
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#define LEGEND 2 /* legend title */
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#define OTHICK 3 /* origin thickness */
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#define PERIOD 4 /* period of polar plot */
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#define SUBTITLE 5 /* subtitle */
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#define SYMFILE 6 /* symbol file */
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#define TSTYLE 7 /* tick mark style */
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#define TITLE 8 /* title */
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#define XLABEL 9 /* x axis label */
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#define XMAP 10 /* x axis mapping */
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#define XMAX 11 /* x axis maximum */
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#define XMIN 12 /* x axis minimum */
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#define XSTEP 13 /* x axis step */
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#define YLABEL 14 /* y axis label */
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#define YMAP 15 /* y axis mapping */
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#define YMAX 16 /* y axis maximum */
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#define YMIN 17 /* y axis minimum */
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#define YSTEP 18 /* y axis step */
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#define NVARS 19 /* number of standard variables */
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/* curve variables */
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#define C 0 /* the curve function */
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#define CCOLOR 1 /* the curve color */
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#define CDATA 2 /* the curve data */
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#define CLABEL 3 /* the curve label */
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#define CLINTYPE 4 /* the curve line type */
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#define CNPOINTS 5 /* number of curve points to plot */
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#define CSYMSIZE 6 /* the curve symbol size */
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#define CSYMTYPE 7 /* the curve symbol type */
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#define CTHICK 8 /* the curve line thickness */
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#define NCVARS 9 /* number of curve variables */
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#define MAXCUR 8 /* maximum number of curves */
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/* types */
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#define REAL 1 /* floating point */
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#define STRING 2 /* character array */
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#define FUNCTION 3 /* function definition */
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#define DATA 4 /* a set of real points */
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/* flags */
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#define DEFINED 01 /* variable is defined */
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typedef struct {
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char *name; /* the variable name */
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short type; /* the variable type */
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char *descrip; /* brief description */
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unsigned short flags; /* DEFINED, etc. */
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union {
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char *s; /* STRING value */
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DARRAY d; /* DATA value */
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char *dfn; /* variable definition */
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} v; /* value */
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} VARIABLE; /* a variable */
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extern IVAR *ivhead; /* the intermediate list */
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extern VARIABLE gparam[NVARS]; /* the graph variables */
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extern VARIABLE cparam[MAXCUR][NCVARS]; /* the curve variables */
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extern VARIABLE *vlookup();
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#define mgclear(vname) undefine(vlookup(vname))
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extern void mgclearall(void);
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extern void mgload(char *file);
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extern void mgsave(char *file);
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extern void setmgvar(char *fname, FILE *fp, char *string);
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extern int mgcurve(int c, int (*f)());
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extern void mgtoa(register char *s, VARIABLE *vp);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RAD_MGVARS_H_ */
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