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greg |
2.2 |
/* Copyright (c) 1992 Regents of the University of California */ |
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greg |
1.1 |
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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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greg |
2.2 |
#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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greg |
2.2 |
int type; /* node type */ |
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greg |
1.1 |
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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greg |
2.2 |
double num; /* number */ |
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greg |
1.1 |
char *name; /* symbol name */ |
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int chan; /* channel number */ |
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greg |
2.4 |
unsigned long tick; /* timestamp */ |
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greg |
1.1 |
struct vardef { |
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char *name; /* variable name */ |
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greg |
2.2 |
int nlinks; /* number of references */ |
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greg |
1.1 |
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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greg |
2.2 |
#define MAXWORD 63 /* maximum word/id length */ |
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#define CNTXMARK '`' /* context mark */ |
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greg |
1.6 |
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greg |
2.2 |
#define isid(c) (isalnum(c) || (c) == '_' || \ |
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greg |
1.6 |
(c) == '.' || (c) == CNTXMARK) |
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greg |
1.1 |
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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greg |
2.3 |
extern char *getname(), *qualname(), *argfun(); |
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extern char *setcontext(), *pushcontext(), *popcontext(); |
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greg |
1.1 |
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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greg |
2.4 |
extern unsigned long eclock; |
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greg |
1.1 |
extern int nextc; |
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greg |
2.2 |
#define evalue(ep) (*eoper[(ep)->type])(ep) |
