home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Crawly Crypt Collection 1
/
crawlyvol1.bin
/
program
/
compiler
/
bob13st
/
bob.h
< prev
next >
Wrap
C/C++ Source or Header
|
1991-12-24
|
10KB
|
302 lines
/* bob.h - bob definitions */
/*
Copyright (c) 1991, by David Michael Betz
All rights reserved
*/
#include <stdio.h>
#include <ctype.h>
/* limits */
#define TKNSIZE 50 /* maximum token size */
#define SMAX 500 /* runtime stack size */
#define CMAX 32767 /* code buffer size */
/* useful definitions */
#define TRUE 1
#define FALSE 0
/* token definitions */
#define T_NOTOKEN -1
#define T_EOF 0
/* non-character tokens */
#define _TMIN 256
#define T_STRING 256
#define T_IDENTIFIER 257
#define T_NUMBER 258
#define T_CLASS 259
#define T_STATIC 260
#define T_IF 261
#define T_ELSE 262
#define T_WHILE 263
#define T_RETURN 264
#define T_FOR 265
#define T_BREAK 266
#define T_CONTINUE 267
#define T_DO 268
#define T_NEW 269
#define T_NIL 270
#define T_LE 271 /* '<=' */
#define T_EQ 272 /* '==' */
#define T_NE 273 /* '!=' */
#define T_GE 274 /* '>=' */
#define T_SHL 275 /* '<<' */
#define T_SHR 276 /* '>>' */
#define T_AND 277 /* '&&' */
#define T_OR 278 /* '||' */
#define T_INC 279 /* '++' */
#define T_DEC 280 /* '--' */
#define T_ADDEQ 281 /* '+=' */
#define T_SUBEQ 282 /* '-=' */
#define T_MULEQ 283 /* '*=' */
#define T_DIVEQ 284 /* '/=' */
#define T_REMEQ 285 /* '%=' */
#define T_ANDEQ 286 /* '&=' */
#define T_OREQ 287 /* '|=' */
#define T_XOREQ 288 /* '^=' */
#define T_SHLEQ 289 /* '<<=' */
#define T_SHREQ 290 /* '>>=' */
#define T_CC 291 /* '::' */
#define T_MEMREF 292 /* '->' */
#define _TMAX 292
/* stack manipulation macros */
#define check(n) { if (sp - (n) < stkbase) stackover(); }
#define chktype(o,t) { if (sp[o].v_type != t) badtype(o,t); }
#define push(x,t,f) (--sp, sp->v_type = (t), sp->v.f = (x))
#define push_integer(x) push(x,DT_INTEGER,v_integer)
#define push_class(x) push(x,DT_CLASS,v_class)
#define push_object(x) push(x,DT_OBJECT,v_object)
#define push_bytecode(x) push(x,DT_BYTECODE,v_vector)
#define push_var(x) push(x,DT_VAR,v_var)
#define push_nil() (--sp, sp->v_type = DT_NIL)
/* macros to set values */
#define set(s,x,t,f) ((s)->v.f = (x), (s)->v_type = (t))
#define set_integer(s,x) set(s,x,DT_INTEGER,v_integer)
#define set_class(s,x) set(s,x,DT_CLASS,v_class)
#define set_object(s,x) set(s,x,DT_OBJECT,v_object)
#define set_code(s,x) set(s,x,DT_CODE,v_code)
#define set_bytecode(s,x) set(s,x,DT_BYTECODE,v_vector)
#define set_dictionary(s,x) set(s,x,DT_DICTIONARY,v_dictionary)
#define set_var(s,x) set(s,x,DT_VAR,v_var)
#define set_string(s,x) set(s,x,DT_STRING,v_string)
#define set_vector(s,x) set(s,x,DT_VECTOR,v_vector)
#define set_file(s,x) set(s,x,DT_FILE,v_fp)
#define set_nil(s) ((s)->v_type = DT_NIL)
/* value field access macros */
#define valtype(x) ((x)->v_type)
#define isnil(x) ((x)->v_type == DT_NIL)
/* class field access macros */
#define claddr(x) ((x)->v.v_class)
#define clgetname(x) (&claddr(x)->cl_name)
#define clgetbase(x) (&claddr(x)->cl_base)
#define clgetmembers(x) (&claddr(x)->cl_members)
#define clgetfunctions(x) (&claddr(x)->cl_functions)
#define clgetsize(x) (claddr(x)->cl_size)
/* object field access macros */
#define objaddr(x) ((x)->v.v_object)
#define objgetclass(x) (&objaddr(x)->obj_class)
#define objgetmember(x,i) (&objaddr(x)->obj_members[i])
#define objsetmember(x,i,v) (objaddr(x)->obj_members[i] = (v))
/* vector field access macros */
#define vecaddr(x) ((x)->v.v_vector)
#define vecgetsize(x) (vecaddr(x)->vec_size)
#define vecgetelement(x,i) (&vecaddr(x)->vec_data[i])
#define vecsetelement(x,i,v) (vecaddr(x)->vec_data[i] = (v))
/* string field access macros */
#define straddr(x) ((x)->v.v_string)
#define strgetsize(x) (straddr(x)->str_size)
#define strgetdata(x) (straddr(x)->str_data)
/* dictionary field access macros */
#define diaddr(x) ((x)->v.v_dictionary)
#define digetclass(x) (&diaddr(x)->di_class)
#define digetcontents(x) (&diaddr(x)->di_contents)
/* dictionary entry field access macros */
#define deaddr(x) ((x)->v.v_var)
#define degetdictionary(x) (&deaddr(x)->de_dictionary)
#define degetkey(x) (&deaddr(x)->de_key)
#define degetvalue(x) (&deaddr(x)->de_value)
#define degetnext(x) (&deaddr(x)->de_next)
#define degettype(x) (deaddr(x)->de_type)
/* value descriptor structure */
typedef struct value
{
int v_type; /* data type */
union
{ /* value */
struct class *v_class; /* class (in heap) */
struct object *v_object; /* object (in heap) */
struct vector *v_vector; /* vector (in heap) */
struct string *v_string; /* string (in heap) */
struct dictionary *v_dictionary; /* dictionary (in heap) */
struct dict_entry *v_var; /* variable (in heap) */
int (*v_code)(); /* code for built-in function */
long v_integer; /* integer */
FILE *v_fp; /* file pointer */
struct hdr *v_hdr; /* (used by garbage collector) */
struct value *v_chain; /* (used by garbage collector) */
} v;
} VALUE;
typedef struct hdr
{
char hdr_type;
char hdr_flags;
VALUE *hdr_chain;
} HDR;
typedef struct class
{
HDR cl_hdr;
VALUE cl_name;
VALUE cl_base;
VALUE cl_members;
VALUE cl_functions;
int cl_size;
} CLASS;
typedef struct object
{
HDR obj_hdr;
VALUE obj_class;
VALUE obj_members[1];
} OBJECT;
typedef struct vector
{
HDR vec_hdr;
int vec_size;
VALUE vec_data[1];
} VECTOR;
typedef struct string
{
HDR str_hdr;
int str_size;
char str_data[1];
} STRING;
typedef struct dictionary
{
HDR di_hdr;
VALUE di_class;
VALUE di_contents;
} DICTIONARY;
/* dictionary entry structure */
typedef struct dict_entry
{
HDR de_hdr;
VALUE de_dictionary; /* backpointer to dictionary */
VALUE de_key; /* symbol name */
int de_type; /* symbol type */
VALUE de_value; /* symbol value */
VALUE de_next; /* next entry */
} DICT_ENTRY;
/* symbol types */
#define ST_CLASS 1 /* class definition */
#define ST_DATA 2 /* data member */
#define ST_SDATA 3 /* static data member */
#define ST_FUNCTION 4 /* function member */
#define ST_SFUNCTION 5 /* static function member */
/* data types */
#define _DTMIN 0
#define DT_NIL 0
#define DT_CLASS 1
#define DT_OBJECT 2
#define DT_VECTOR 3
#define DT_INTEGER 4
#define DT_STRING 5
#define DT_BYTECODE 6
#define DT_CODE 7
#define DT_DICTIONARY 8
#define DT_VAR 9
#define DT_FILE 10
#define _DTMAX 10
/* function argument structure */
typedef struct argument
{
char *arg_name; /* argument name */
struct argument *arg_next; /* next argument */
} ARGUMENT;
/* literal structure */
typedef struct literal
{
VALUE lit_value; /* literal value */
struct literal *lit_next; /* next literal */
} LITERAL;
/* opcodes */
#define OP_BRT 0x01 /* branch on true */
#define OP_BRF 0x02 /* branch on false */
#define OP_BR 0x03 /* branch unconditionally */
#define OP_NIL 0x04 /* load top of stack with nil */
#define OP_PUSH 0x05 /* push nil onto stack */
#define OP_NOT 0x06 /* logical negate top of stack */
#define OP_NEG 0x07 /* negate top of stack */
#define OP_ADD 0x08 /* add top two stack entries */
#define OP_SUB 0x09 /* subtract top two stack entries */
#define OP_MUL 0x0A /* multiply top two stack entries */
#define OP_DIV 0x0B /* divide top two stack entries */
#define OP_REM 0x0C /* remainder of top two stack entries */
#define OP_BAND 0x0D /* bitwise and of top two stack entries */
#define OP_BOR 0x0E /* bitwise or of top two stack entries */
#define OP_XOR 0x0F /* bitwise xor of top two stack entries */
#define OP_BNOT 0x10 /* bitwise not of top two stack entries */
#define OP_SHL 0x11 /* shift left top two stack entries */
#define OP_SHR 0x12 /* shift right top two stack entries */
#define OP_LT 0x13 /* less than */
#define OP_LE 0x14 /* less than or equal to */
#define OP_EQ 0x15 /* equal to */
#define OP_NE 0x16 /* not equal to */
#define OP_GE 0x17 /* greater than or equal to */
#define OP_GT 0x18 /* greater than */
#define OP_INC 0x19 /* increment */
#define OP_DEC 0x1A /* decrement */
#define OP_LIT 0x1B /* load literal */
#define OP_RETURN 0x1C /* return from interpreter */
#define OP_CALL 0x1D /* call a function */
#define OP_REF 0x1E /* load a variable value */
#define OP_SET 0x1F /* set the value of a variable */
#define OP_VREF 0x20 /* load a vector element */
#define OP_VSET 0x21 /* set a vector element */
#define OP_MREF 0x22 /* load a member variable value */
#define OP_MSET 0x23 /* set a member variable */
#define OP_AREF 0x24 /* load an argument value */
#define OP_ASET 0x25 /* set an argument value */
#define OP_TREF 0x26 /* load a temporary variable value */
#define OP_TSET 0x27 /* set a temporary variable */
#define OP_TSPACE 0x28 /* allocate temporary variable space */
#define OP_SEND 0x29 /* send a message to an object */
#define OP_DUP2 0x2A /* duplicate top two elements on the stack */
#define OP_NEW 0x2B /* create a new class object */
/* external variables */
extern VALUE *stkbase,*sp,*fp,*stktop;
extern VALUE nil;
/* external routines */
extern CLASS *newclass();
extern OBJECT *newobject();
extern VECTOR *newvector();
extern STRING *newstring();
extern STRING *makestring();
extern DICTIONARY *newdictionary();
extern DICT_ENTRY *findentry();
extern DICT_ENTRY *addentry();
extern char *getcstring();