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greg |
1.1 |
/* Copyright (c) 1986 Regents of the University of California */
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/* SCCSid "$SunId$ LBL" */
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/*
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* calcomp.h - header file for expression parser.
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*
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*/
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/* EPNODE types */
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#define VAR 1
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#define NUM 2
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#define UMINUS 3
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#define CHAN 4
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#define FUNC 5
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#define ARG 6
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#define TICK 7
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#define SYM 8
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greg |
1.4 |
/* also: '+', '-', '*', '/', '^', '=', ':' */
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greg |
1.1 |
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typedef struct {
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char *fname; /* function name */
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greg |
1.5 |
short nargs; /* # of required arguments */
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short atyp; /* assignment type (':' or '=') */
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greg |
1.1 |
double (*f)(); /* pointer to function */
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} LIBR; /* a library function */
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typedef struct epnode {
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int type; /* node type */
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struct epnode *sibling; /* next child this level */
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union {
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struct epnode *kid; /* first child */
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double num; /* number */
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char *name; /* symbol name */
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int chan; /* channel number */
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long tick; /* timestamp */
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struct vardef {
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char *name; /* variable name */
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int nlinks; /* number of references */
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struct epnode *def; /* definition */
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LIBR *lib; /* library definition */
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struct vardef *next; /* next in hash list */
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} *ln; /* link */
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} v; /* value */
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} EPNODE; /* an expression node */
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typedef struct vardef VARDEF; /* a variable definition */
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extern double eval(), varvalue(), chanvalue(), funvalue();
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extern double argument(), getnum();
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extern double (*eoper[])();
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extern int getinum();
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extern char *getname(), *argfun();
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extern EPNODE *eparse(), *ekid(), *dlookup(), *dpop(), *dfirst(), *dnext();
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extern EPNODE *getdefn(), *getchan();
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extern EPNODE *getE1(), *getE2(), *getE3(), *getE4(), *getE5(), *rconst();
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extern VARDEF *varinsert(), *varlookup(), *argf();
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extern LIBR *liblookup();
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extern long eclock;
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extern int nextc;
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extern int errno;
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#define evalue(ep) (*eoper[(ep)->type])(ep)
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