| 1 |
teddy |
1.1 |
|
| 2 |
|
|
#define HASHTBLSIZE 2048 |
| 3 |
|
|
|
| 4 |
|
|
/* First, define some types. */ |
| 5 |
|
|
|
| 6 |
|
|
/* A value of some type */ |
| 7 |
|
|
typedef struct { |
| 8 |
|
|
enum { |
| 9 |
|
|
integer, |
| 10 |
|
|
string, |
| 11 |
|
|
func, /* Function pointer */ |
| 12 |
|
|
symb, |
| 13 |
|
|
list |
| 14 |
|
|
} type; /* Type of stack element */ |
| 15 |
|
|
|
| 16 |
|
|
union { |
| 17 |
|
|
void *ptr; /* Pointer to the content */ |
| 18 |
|
|
int val; /* ...or an integer */ |
| 19 |
|
|
} content; /* Stores a pointer or an integer */ |
| 20 |
|
|
|
| 21 |
|
|
int gc_garb; |
| 22 |
|
|
|
| 23 |
|
|
} value; |
| 24 |
|
|
|
| 25 |
|
|
/* A symbol with a name and possible value */ |
| 26 |
|
|
/* (These do not need reference counters, they are kept unique by |
| 27 |
|
|
hashing.) */ |
| 28 |
|
|
typedef struct symbol_struct { |
| 29 |
|
|
char *id; /* Symbol name */ |
| 30 |
|
|
value *val; /* The value (if any) bound to it */ |
| 31 |
|
|
struct symbol_struct *next; /* In case of hashing conflicts, a */ |
| 32 |
|
|
} symbol; /* symbol is a kind of stack item. */ |
| 33 |
|
|
|
| 34 |
|
|
/* A type for a hash table for symbols */ |
| 35 |
|
|
typedef symbol *hashtbl[HASHTBLSIZE]; /* Hash table declaration */ |
| 36 |
|
|
|
| 37 |
|
|
/* An item (value) on a stack */ |
| 38 |
|
|
typedef struct stackitem_struct |
| 39 |
|
|
{ |
| 40 |
|
|
value *item; /* The value on the stack */ |
| 41 |
|
|
/* (This is never NULL) */ |
| 42 |
|
|
struct stackitem_struct *next; /* Next item */ |
| 43 |
|
|
} stackitem; |
| 44 |
|
|
|
| 45 |
|
|
/* An environment; gives access to the stack and a hash table of |
| 46 |
|
|
defined symbols */ |
| 47 |
|
|
typedef struct { |
| 48 |
|
|
stackitem *gc_ref; |
| 49 |
|
|
int gc_limit, gc_count; |
| 50 |
|
|
|
| 51 |
|
|
stackitem *head; /* Head of the stack */ |
| 52 |
|
|
hashtbl symbols; /* Hash table of all variable bindings */ |
| 53 |
|
|
int err; /* Error flag */ |
| 54 |
|
|
char *in_string; /* Input pending to be read */ |
| 55 |
|
|
char *free_string; /* Free this string when all input is |
| 56 |
|
|
read from in_string */ |
| 57 |
|
|
FILE *inputstream; /* stdin or a file, most likely */ |
| 58 |
|
|
int interactive; /* print prompts, stack, etc */ |
| 59 |
|
|
} environment; |
| 60 |
|
|
|
| 61 |
|
|
/* A type for pointers to external functions */ |
| 62 |
|
|
typedef void (*funcp)(environment *); /* funcp is a pointer to a void |
| 63 |
|
|
function (environment *) */ |
| 64 |
|
|
|
| 65 |
|
|
void init_env(environment *env); |
| 66 |
|
|
void printerr(const char* in_string); |
| 67 |
|
|
extern void toss(environment *env); |
| 68 |
|
|
symbol **hash(hashtbl in_hashtbl, const char *in_string); |
| 69 |
|
|
value* new_val(environment *env); |
| 70 |
|
|
void gc_mark(value *val); |
| 71 |
|
|
extern void gc_init(environment *env); |
| 72 |
|
|
void push_val(environment *env, value *val); |
| 73 |
|
|
void push_int(environment *env, int in_val); |
| 74 |
|
|
void push_cstring(environment *env, const char *in_string); |
| 75 |
|
|
char *mangle_str(const char *old_string); |
| 76 |
|
|
extern void mangle(environment *env); |
| 77 |
|
|
void push_sym(environment *env, const char *in_string); |
| 78 |
|
|
extern void nl(); |
| 79 |
|
|
extern void type(environment *env); |
| 80 |
|
|
void print_h(stackitem *stack_head, int noquote); |
| 81 |
|
|
extern void print_(environment *env); |
| 82 |
|
|
extern void print(environment *env); |
| 83 |
|
|
extern void princ_(environment *env); |
| 84 |
|
|
extern void princ(environment *env); |
| 85 |
|
|
void print_st(stackitem *stack_head, long counter); |
| 86 |
|
|
extern void printstack(environment *env); |
| 87 |
|
|
extern void swap(environment *env); |
| 88 |
|
|
extern void rot(environment *env); |
| 89 |
|
|
extern void rcl(environment *env); |
| 90 |
|
|
extern void eval(environment *env); |
| 91 |
|
|
extern void rev(environment *env); |
| 92 |
|
|
extern void pack(environment *env); |
| 93 |
|
|
extern void expand(environment *env); |
| 94 |
|
|
extern void eq(environment *env); |
| 95 |
|
|
extern void not(environment *env); |
| 96 |
|
|
extern void neq(environment *env); |
| 97 |
|
|
extern void def(environment *env); |
| 98 |
|
|
extern void quit(environment *env); |
| 99 |
|
|
extern void clear(environment *env); |
| 100 |
|
|
extern void words(environment *env); |
| 101 |
|
|
void forget_sym(symbol **hash_entry); |
| 102 |
|
|
extern void forget(environment *env); |
| 103 |
|
|
extern void errn(environment *env); |
| 104 |
|
|
extern void sx_2b(environment *env); |
| 105 |
|
|
extern void sx_2d(environment *env); |
| 106 |
|
|
extern void sx_3e(environment *env); |
| 107 |
|
|
value *copy_val(environment *env, value *old_value); |
| 108 |
|
|
extern void sx_647570(environment *env); |
| 109 |
|
|
extern void sx_6966(environment *env); |
| 110 |
|
|
extern void ifelse(environment *env); |
| 111 |
|
|
extern void sx_7768696c65(environment *env); |
| 112 |
|
|
extern void sx_666f72(environment *env); |
| 113 |
|
|
extern void to(environment *env); |
| 114 |
|
|
extern void readline(environment *env); |
| 115 |
|
|
extern void sx_72656164(environment *env); |
Parent Directory
| 
Revision Log