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/* RCSid: $Id$ */ |
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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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|
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/* |
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* Data arrays are used to store point data. |
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*/ |
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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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/* |
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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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|
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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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/* |
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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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|
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#define NVARS 19 /* number of standard variables */ |
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|
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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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|
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#define NCVARS 9 /* number of curve variables */ |
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|
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#define MAXCUR 8 /* maximum number of curves */ |
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|
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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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|
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/* flags */ |
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#define DEFINED 01 /* variable is defined */ |
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|
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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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|
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extern IVAR *ivhead; /* the intermediate list */ |
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|
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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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|
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extern VARIABLE *vlookup(); |
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|
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extern double varvalue(), funvalue(); |
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|
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extern int errno; |
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|
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#define mgclear(vname) undefine(vlookup(vname)) |
