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/* RCSid $Id$ */
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/*
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* calcomp.h - header file for expression parser.
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*/
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#include "copyright.h"
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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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/* also: '+', '-', '*', '/', '^', '=', ':' */
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typedef struct {
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char *fname; /* function name */
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short nargs; /* # of required arguments */
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short atyp; /* assignment type (':' or '=') */
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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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unsigned 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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#define MAXWORD 127 /* maximum word/id length */
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#define CNTXMARK '`' /* context mark */
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#define isid(c) (isalnum(c) || (c) == '_' || \
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(c) == '.' || (c) == CNTXMARK)
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#define evalue(ep) (*eoper[(ep)->type])(ep)
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/* flags to set in esupport */
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#define E_VARIABLE 001
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#define E_FUNCTION 002
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#define E_INCHAN 004
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#define E_OUTCHAN 010
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#define E_RCONST 020
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#define E_REDEFW 040
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extern double (*eoper[])();
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extern unsigned long eclock;
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extern unsigned int esupport;
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extern EPNODE *curfunc;
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extern int nextc;
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#ifdef NOPROTO
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extern void fcompile();
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extern void scompile();
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extern double varvalue();
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extern double evariable();
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extern void varset();
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extern void dclear();
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extern void dremove();
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extern int vardefined();
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extern char *setcontext();
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extern char *pushcontext();
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extern char *popcontext();
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extern char *qualname();
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extern int incontext();
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extern void chanout();
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extern void dcleanup();
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extern EPNODE *dlookup();
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extern VARDEF *varlookup();
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extern VARDEF *varinsert();
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extern void varfree();
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extern EPNODE *dfirst();
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extern EPNODE *dnext();
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extern EPNODE *dpop();
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extern void dpush();
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extern void addchan();
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extern void getstatement();
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extern EPNODE *getdefn();
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extern EPNODE *getchan();
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extern EPNODE *eparse();
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extern double eval();
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extern int epcmp();
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extern void epfree();
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extern EPNODE *ekid();
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extern int nekids();
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extern void initfile();
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extern void initstr();
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extern void getscanpos();
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extern int scan();
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extern char *long2ascii();
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extern void syntax();
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extern void addekid();
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extern char *getname();
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extern int getinum();
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extern double getnum();
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extern EPNODE *getE1();
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extern EPNODE *getE2();
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extern EPNODE *getE3();
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extern EPNODE *getE4();
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extern EPNODE *getE5();
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extern EPNODE *rconst();
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extern int isconstvar();
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extern int isconstfun();
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extern int fundefined();
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extern double funvalue();
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extern void funset();
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extern int nargum();
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extern double argument();
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extern VARDEF *argf();
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extern char *argfun();
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extern double efunc();
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extern LIBR *liblookup();
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extern void libupdate();
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extern void eprint();
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extern void dprint();
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extern char *savestr();
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extern void freestr();
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extern int shash();
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extern char *emalloc();
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extern char *ecalloc();
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extern char *erealloc();
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extern void efree();
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extern void eputs();
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extern void wputs();
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extern void quit();
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extern double chanvalue();
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#else
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/* defined in caldefn.c */
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extern void fcompile(char *fname);
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extern void scompile(char *str, char *fname, int ln);
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extern double varvalue(char *vname);
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extern double evariable(EPNODE *ep);
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extern void varset(char *fname, int assign, double val);
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extern void dclear(char *name);
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extern void dremove(char *name);
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extern int vardefined(char *name);
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extern char *setcontext(char *ctx);
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extern char *pushcontext(char *ctx);
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extern char *popcontext(void);
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extern char *qualname(char *nam, int lvl);
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extern int incontext(char *qn);
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extern void chanout(void (*cs)(int n, double v));
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extern void dcleanup(int lvl);
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extern EPNODE *dlookup(char *name);
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extern VARDEF *varlookup(char *name);
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extern VARDEF *varinsert(char *name);
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extern void varfree(VARDEF *ln);
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extern EPNODE *dfirst(void);
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extern EPNODE *dnext(void);
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extern EPNODE *dpop(char *name);
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extern void dpush(char *nm, EPNODE *ep);
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extern void addchan(EPNODE *sp);
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extern void getstatement();
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extern EPNODE *getdefn();
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extern EPNODE *getchan();
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/* defined in calexpr.c */
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extern EPNODE *eparse(char *expr);
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extern double eval(char *expr);
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extern int epcmp(EPNODE *ep1, EPNODE *ep2);
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extern void epfree(EPNODE *epar);
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extern EPNODE *ekid(EPNODE *ep, int n);
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extern int nekids(EPNODE *ep);
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extern void initfile(FILE *fp, char *fn, int ln);
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extern void initstr(char *s, char *fn, int ln);
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extern void getscanpos(char **fnp, int *lnp, char **spp, FILE **fpp);
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extern int scan(void);
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extern char *long2ascii(long l);
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extern void syntax(char *err);
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extern void addekid(EPNODE *ep, EPNODE *ekid);
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extern char *getname(void);
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extern int getinum(void);
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extern double getnum(void);
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extern EPNODE *getE1(void);
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extern EPNODE *getE2(void);
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extern EPNODE *getE3(void);
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extern EPNODE *getE4(void);
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extern EPNODE *getE5(void);
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extern EPNODE *rconst(EPNODE *epar);
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extern int isconstvar(EPNODE *ep);
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extern int isconstfun(EPNODE *ep);
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/* defined in calfunc.c */
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extern int fundefined(char *fname);
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extern double funvalue(char *fname, int n, double *a);
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extern void funset(char *fname, int nargs, int assign, double (*fptr)());
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extern int nargum(void);
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extern double argument(int n);
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extern VARDEF *argf(int n);
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extern char *argfun(int n);
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extern double efunc(EPNODE *ep);
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extern LIBR *liblookup(char *fname);
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extern void libupdate(char *fn);
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/* defined in calprnt.c */
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extern void eprint(EPNODE *ep, FILE *fp);
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extern void dprint(char *name, FILE *fp);
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/* defined in savestr.c */
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extern char *savestr(char *str);
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extern void freestr(char *s);
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extern int shash(char *s);
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/* defined in ealloc.c */
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extern char *emalloc(unsigned int n);
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extern char *ecalloc(unsigned int ne, unsigned int es);
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extern char *erealloc(char *cp, unsigned int n);
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extern void efree(char *cp);
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/* miscellaneous */
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extern void eputs(char *s);
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extern void wputs(char *s);
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extern void quit(int code);
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/* defined by client */
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extern double chanvalue(int n);
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#endif
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