| 1 |
/* Copyright (c) 1986 Regents of the University of California */ |
| 2 |
|
| 3 |
/* SCCSid "$SunId$ LBL" */ |
| 4 |
|
| 5 |
/* |
| 6 |
* calcomp.h - header file for expression parser. |
| 7 |
* |
| 8 |
*/ |
| 9 |
/* EPNODE types */ |
| 10 |
#define VAR 1 |
| 11 |
#define NUM 2 |
| 12 |
#define UMINUS 3 |
| 13 |
#define CHAN 4 |
| 14 |
#define FUNC 5 |
| 15 |
#define ARG 6 |
| 16 |
#define TICK 7 |
| 17 |
#define SYM 8 |
| 18 |
/* also: '+', '-', '*', '/', '^', '=' */ |
| 19 |
|
| 20 |
typedef struct { |
| 21 |
char *fname; /* function name */ |
| 22 |
int nargs; /* # of required arguments */ |
| 23 |
double (*f)(); /* pointer to function */ |
| 24 |
} LIBR; /* a library function */ |
| 25 |
|
| 26 |
typedef struct epnode { |
| 27 |
int type; /* node type */ |
| 28 |
struct epnode *sibling; /* next child this level */ |
| 29 |
union { |
| 30 |
struct epnode *kid; /* first child */ |
| 31 |
double num; /* number */ |
| 32 |
char *name; /* symbol name */ |
| 33 |
int chan; /* channel number */ |
| 34 |
long tick; /* timestamp */ |
| 35 |
struct vardef { |
| 36 |
char *name; /* variable name */ |
| 37 |
int nlinks; /* number of references */ |
| 38 |
struct epnode *def; /* definition */ |
| 39 |
LIBR *lib; /* library definition */ |
| 40 |
struct vardef *next; /* next in hash list */ |
| 41 |
} *ln; /* link */ |
| 42 |
} v; /* value */ |
| 43 |
} EPNODE; /* an expression node */ |
| 44 |
|
| 45 |
typedef struct vardef VARDEF; /* a variable definition */ |
| 46 |
|
| 47 |
extern double eval(), varvalue(), chanvalue(), funvalue(); |
| 48 |
extern double argument(), getnum(); |
| 49 |
extern double (*eoper[])(); |
| 50 |
extern int getinum(); |
| 51 |
extern char *getname(), *argfun(); |
| 52 |
extern EPNODE *eparse(), *ekid(), *dlookup(), *dpop(), *dfirst(), *dnext(); |
| 53 |
extern EPNODE *getdefn(), *getchan(); |
| 54 |
extern EPNODE *getE1(), *getE2(), *getE3(), *getE4(), *getE5(), *rconst(); |
| 55 |
extern VARDEF *varinsert(), *varlookup(), *argf(); |
| 56 |
extern LIBR *liblookup(); |
| 57 |
extern long eclock; |
| 58 |
extern int nextc; |
| 59 |
extern int errno; |
| 60 |
|
| 61 |
#define evalue(ep) (*eoper[(ep)->type])(ep) |
