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Bob 1.5.sit.hqx
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Bob 1.5
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Bob.h
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1993-10-02
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/* bob.h - bob definitions */
/*
Copyright (c) 1991, by David Michael Betz
All rights reserved
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
/* limits */
#define TKNSIZE 50 /* maximum token size */
#define SMAX 500 /* runtime stack size */
/* useful definitions */
#define TRUE 1
#define FALSE 0
/* argument check macros */
#define argcount(n,cnt) { if ((n) != (cnt)) wrongcnt(n,cnt); }
/* 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_string(x) push(x,DT_STRING,v_string)
#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_iostream(s,x) set(s,x,DT_IOSTREAM,v_iostream)
#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)
/* i/o stream access macros */
#define ios_t(x) ((x)->v.v_iostream->ios_dispatch)
#define ios_d(x) ((x)->v.v_iostream->ios_data)
#define iosclose(x) ((*ios_t(x)->iod_close)(ios_d(x)))
#define iosgetc(x) ((*ios_t(x)->iod_getc)(ios_d(x)))
#define iosputc(c,x) ((*ios_t(x)->iod_putc)((c),ios_d(x)))
#define iosputs(s,x) ((*ios_t(x)->iod_puts)((s),ios_d(x)))
/* 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) */
#ifdef __STDC__
int (*v_code)(int); /* code for built-in function */
#else
int (*v_code)(); /* code for built-in function */
#endif
long v_integer; /* integer */
struct iostream *v_iostream; /* i/o stream (in heap) */
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;
/* i/o stream dispatch structure */
typedef struct iodispatch {
#ifdef __STDC__
int (*iod_close)(void *);
int (*iod_getc)(void *);
int (*iod_putc)(int,void *);
int (*iod_puts)(char *,void *);
#else
int (*iod_close)();
int (*iod_getc)();
int (*iod_putc)();
int (*iod_puts)();
#endif
} IODISPATCH;
/* i/o stream structure */
typedef struct iostream {
HDR ios_hdr;
IODISPATCH *ios_dispatch;
void *ios_data;
} IOSTREAM;
/* 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_IOSTREAM 10
#define _DTMAX 10
/* 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 */
#ifdef __STDC__
/* standard stuff */
/*
char *calloc(int,int);
void free(char *);
char *strcpy(char *,char *);
char *strncpy(char *,char *,int);
char *strchr(char *,int);
int strcmp(char *,char *);
int strncmp(char *,char *,int);
int strlen(char *);
void *memcpy(void *,void *,int);
int system(char *);
*/
/* bobcom.c */
int init_compiler(void);
void mark_compiler(void);
int compile_definitions(int (*getcf)(),void *getcd);
/* bob.c */
void info(char *fmt,...);
void error(char *fmt,...);
void osputs(char *str);
/* bobscn.c */
int init_scanner(int (*gf)(void *),void *gd);
int token(void);
int stoken(int tkn);
char *tkn_name(int tkn);
int parse_error(char *msg);
/* bobint.c */
int execute(char *name);
int start_call(char *name);
int start_send(OBJECT *obj,char *selector);
int execute_call(int argc);
void badtype(int off,int type);
void stackover(void);
/* bobdbg.c */
int decode_procedure(VALUE *code);
int decode_instruction(VALUE *code,int lc);
/* bobfcn.c */
void init_functions(void);
void add_function(char *name,int (*fcn)());
int print1(VALUE *ios,int qflag,VALUE *val);
void wrongcnt(int n,int cnt);
/* bobmem.c */
int initialize(int smax);
DICT_ENTRY *addentry(VALUE *dict,char *key,int type);
DICT_ENTRY *findentry(VALUE *dict,char *key);
STRING *makestring(char *str);
char *getcstring(char *buf,int max,VALUE *str);
STRING *newstring(int n);
OBJECT *newobject(VALUE *class);
VECTOR *newvector(int n);
CLASS *newclass(char *name,VALUE *base);
DICTIONARY *newdictionary(VALUE *class);
IOSTREAM *newiostream(IODISPATCH *iod,void *data);
void gc(void);
void mark(VALUE *val);
#else
extern CLASS *newclass();
extern OBJECT *newobject();
extern VECTOR *newvector();
extern STRING *newstring();
extern STRING *makestring();
extern DICTIONARY *newdictionary();
extern IOSTREAM *newiostream();
extern DICT_ENTRY *findentry();
extern DICT_ENTRY *addentry();
extern char *getcstring();
#endif