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/* Copyright (c) 1986 Regents of the University of California */ |
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/* SCCSid "$SunId$ LBL" */ |
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|
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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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/* 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)(); /* pointer to function */ |
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} LIBR; /* a library function */ |
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|
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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) |
