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/* RCSid $Id: calcomp.h,v 2.26 2024/02/26 18:16:35 greg Exp $ */ |
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/* |
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* calcomp.h - header file for expression parser. |
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*/ |
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#ifndef _RAD_CALCOMP_H_ |
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#define _RAD_CALCOMP_H_ |
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|
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#include <stdio.h> |
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|
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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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#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 CLKT 7 |
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#define SYM 8 |
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/* also: '+', '-', '*', '/', '^', '=', ':' */ |
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|
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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)(char *); /* pointer to function */ |
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} ELIBR; /* a library function */ |
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|
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typedef struct epnode { |
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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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ELIBR *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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struct epnode *sibling; /* next child this level */ |
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short type; /* node type */ |
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short nkids; /* child count (neg if array) */ |
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} EPNODE; /* an expression node */ |
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|
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typedef struct vardef VARDEF; /* a variable definition */ |
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|
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#define nekids(ep) abs((ep)->nkids) |
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|
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#define RMAXWORD 127 /* maximum word/id length */ |
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#define CNTXMARK '`' /* context mark */ |
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|
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#define isid(c) (isalnum(c) || (c) == '_' || \ |
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(c) == '.' || (c) == CNTXMARK) |
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|
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#define evalue(ep) (*eoper[(ep)->type])(ep) |
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|
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#define dfn_name(ep) ((ep)->v.kid->type == SYM ? \ |
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(ep)->v.kid->v.name : \ |
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(ep)->v.kid->v.kid->v.name) |
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|
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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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|
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extern double (*eoper[])(EPNODE *); |
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extern unsigned long eclock; |
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extern unsigned int esupport; |
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extern EPNODE *ecurfunc; |
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extern int nextc; |
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extern int eofc; |
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/* defined in biggerlib.c */ |
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extern void biggerlib(void); |
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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 *vname, 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 *calcontext(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 doptimize(int activate); |
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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 eaddchan(EPNODE *sp); |
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extern void egetstatement(void); |
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extern EPNODE *egetdefn(void); |
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extern EPNODE *egetchan(void); |
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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, int frep); |
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extern void epoptimize(EPNODE *epar); |
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extern EPNODE *ekid(EPNODE *ep, int n); |
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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 escan(void); |
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extern char *long2ascii(long l); |
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extern void esyntax(char *err); |
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extern void addekid(EPNODE *ep, EPNODE *ek); |
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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, |
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double (*fptr)(char *)); |
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extern int nargum(void); |
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extern double argument(int n); |
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extern VARDEF *eargf(int n); |
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extern char *eargfun(int n); |
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extern double efunc(EPNODE *ep); |
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extern double eargument(EPNODE *ep); |
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extern ELIBR *eliblookup(char *fname); |
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extern void elibupdate(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 by client */ |
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extern double chanvalue(int n); |
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|
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* _RAD_CALCOMP_H_ */ |
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