2 * Copyright © 2016 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
21 #include <ao_lisp_os.h>
23 typedef uint16_t ao_poly;
24 typedef int16_t ao_signed_poly;
28 struct ao_lisp_os_save {
29 ao_poly ao_lisp_atoms;
30 ao_poly ao_lisp_globals;
33 #define AO_LISP_POOL (AO_LISP_POOL_TOTAL - sizeof (struct ao_lisp_os_save))
36 ao_lisp_os_save(void);
39 ao_lisp_os_restore(void);
43 #ifdef AO_LISP_MAKE_CONST
44 #define AO_LISP_POOL_CONST 16384
45 extern uint8_t ao_lisp_const[AO_LISP_POOL_CONST];
46 #define ao_lisp_pool ao_lisp_const
47 #define AO_LISP_POOL AO_LISP_POOL_CONST
49 #define _atom(n) ao_lisp_atom_poly(ao_lisp_atom_intern(n))
51 #define _ao_lisp_atom_quote _atom("quote")
52 #define _ao_lisp_atom_set _atom("set")
53 #define _ao_lisp_atom_setq _atom("setq")
54 #define _ao_lisp_atom_t _atom("t")
55 #define _ao_lisp_atom_car _atom("car")
56 #define _ao_lisp_atom_cdr _atom("cdr")
57 #define _ao_lisp_atom_cons _atom("cons")
58 #define _ao_lisp_atom_last _atom("last")
59 #define _ao_lisp_atom_length _atom("length")
60 #define _ao_lisp_atom_cond _atom("cond")
61 #define _ao_lisp_atom_lambda _atom("lambda")
62 #define _ao_lisp_atom_led _atom("led")
63 #define _ao_lisp_atom_delay _atom("delay")
64 #define _ao_lisp_atom_pack _atom("pack")
65 #define _ao_lisp_atom_unpack _atom("unpack")
66 #define _ao_lisp_atom_flush _atom("flush")
67 #define _ao_lisp_atom_eval _atom("eval")
68 #define _ao_lisp_atom_read _atom("read")
69 #define _ao_lisp_atom_eof _atom("eof")
71 #include "ao_lisp_const.h"
73 #define AO_LISP_POOL 16384
75 extern uint8_t ao_lisp_pool[AO_LISP_POOL];
79 #define AO_LISP_CONS 0
81 #define AO_LISP_STRING 2
82 #define AO_LISP_OTHER 3
84 #define AO_LISP_TYPE_MASK 0x0003
85 #define AO_LISP_TYPE_SHIFT 2
86 #define AO_LISP_REF_MASK 0x7ffc
87 #define AO_LISP_CONST 0x8000
89 /* These have a type value at the start of the struct */
90 #define AO_LISP_ATOM 4
91 #define AO_LISP_BUILTIN 5
92 #define AO_LISP_FRAME 6
93 #define AO_LISP_LAMBDA 7
94 #define AO_LISP_NUM_TYPE 8
98 extern uint16_t ao_lisp_top;
100 #define AO_LISP_OOM 0x01
101 #define AO_LISP_DIVIDE_BY_ZERO 0x02
102 #define AO_LISP_INVALID 0x04
103 #define AO_LISP_UNDEFINED 0x08
104 #define AO_LISP_EOF 0x10
106 extern uint8_t ao_lisp_exception;
109 ao_lisp_is_const(ao_poly poly) {
110 return poly & AO_LISP_CONST;
113 #define AO_LISP_POOL_BASE (ao_lisp_pool - 4)
114 #define AO_LISP_CONST_BASE (ao_lisp_const - 4)
116 #define AO_LISP_IS_CONST(a) (ao_lisp_const <= ((uint8_t *) (a)) && ((uint8_t *) (a)) < ao_lisp_const + AO_LISP_POOL_CONST)
117 #define AO_LISP_IS_POOL(a) (ao_lisp_pool <= ((uint8_t *) (a)) && ((uint8_t *) (a)) < ao_lisp_pool + AO_LISP_POOL)
120 ao_lisp_ref(ao_poly poly);
123 ao_lisp_poly(const void *addr, ao_poly type);
125 struct ao_lisp_type {
126 int (*size)(void *addr);
127 void (*mark)(void *addr);
128 void (*move)(void *addr);
131 struct ao_lisp_cons {
136 struct ao_lisp_atom {
148 struct ao_lisp_frame {
152 struct ao_lisp_val vals[];
155 static inline struct ao_lisp_frame *
156 ao_lisp_poly_frame(ao_poly poly) {
157 return ao_lisp_ref(poly);
160 static inline ao_poly
161 ao_lisp_frame_poly(struct ao_lisp_frame *frame) {
162 return ao_lisp_poly(frame, AO_LISP_OTHER);
166 eval_sexpr, /* Evaluate an sexpr */
177 struct ao_lisp_stack {
178 uint8_t state; /* enum eval_state */
179 ao_poly prev; /* previous stack frame */
180 ao_poly sexprs; /* expressions to evaluate */
181 ao_poly values; /* values computed */
182 ao_poly values_tail; /* end of the values list for easy appending */
183 ao_poly frame; /* current lookup frame */
184 ao_poly list; /* most recent function call */
187 static inline struct ao_lisp_stack *
188 ao_lisp_poly_stack(ao_poly p)
190 return ao_lisp_ref(p);
193 static inline ao_poly
194 ao_lisp_stack_poly(struct ao_lisp_stack *stack)
196 return ao_lisp_poly(stack, AO_LISP_OTHER);
199 extern struct ao_lisp_stack *ao_lisp_stack;
200 extern ao_poly ao_lisp_v;
202 #define AO_LISP_FUNC_LAMBDA 0
203 #define AO_LISP_FUNC_NLAMBDA 1
204 #define AO_LISP_FUNC_MACRO 2
205 #define AO_LISP_FUNC_LEXPR 3
207 struct ao_lisp_builtin {
213 enum ao_lisp_builtin_id {
242 builtin_greater_equal,
253 typedef ao_poly (*ao_lisp_func_t)(struct ao_lisp_cons *cons);
255 extern const ao_lisp_func_t ao_lisp_builtins[];
257 static inline ao_lisp_func_t
258 ao_lisp_func(struct ao_lisp_builtin *b)
260 return ao_lisp_builtins[b->func];
263 struct ao_lisp_lambda {
270 static inline struct ao_lisp_lambda *
271 ao_lisp_poly_lambda(ao_poly poly)
273 return ao_lisp_ref(poly);
276 static inline ao_poly
277 ao_lisp_lambda_poly(struct ao_lisp_lambda *lambda)
279 return ao_lisp_poly(lambda, AO_LISP_OTHER);
283 ao_lisp_poly_other(ao_poly poly) {
284 return ao_lisp_ref(poly);
287 static inline uint8_t
288 ao_lisp_other_type(void *other) {
289 return *((uint8_t *) other);
292 static inline ao_poly
293 ao_lisp_other_poly(const void *other)
295 return ao_lisp_poly(other, AO_LISP_OTHER);
299 ao_lisp_mem_round(int size)
301 return (size + 3) & ~3;
304 #define AO_LISP_OTHER_POLY(other) ((ao_poly)(other) + AO_LISP_OTHER)
306 static inline int ao_lisp_poly_base_type(ao_poly poly) {
307 return poly & AO_LISP_TYPE_MASK;
310 static inline int ao_lisp_poly_type(ao_poly poly) {
311 int type = poly & AO_LISP_TYPE_MASK;
312 if (type == AO_LISP_OTHER)
313 return ao_lisp_other_type(ao_lisp_poly_other(poly));
317 static inline struct ao_lisp_cons *
318 ao_lisp_poly_cons(ao_poly poly)
320 return ao_lisp_ref(poly);
323 static inline ao_poly
324 ao_lisp_cons_poly(struct ao_lisp_cons *cons)
326 return ao_lisp_poly(cons, AO_LISP_CONS);
330 ao_lisp_poly_int(ao_poly poly)
332 return (int) ((ao_signed_poly) poly >> AO_LISP_TYPE_SHIFT);
335 static inline ao_poly
336 ao_lisp_int_poly(int i)
338 return ((ao_poly) i << 2) | AO_LISP_INT;
342 ao_lisp_poly_string(ao_poly poly)
344 return ao_lisp_ref(poly);
347 static inline ao_poly
348 ao_lisp_string_poly(char *s)
350 return ao_lisp_poly(s, AO_LISP_STRING);
353 static inline struct ao_lisp_atom *
354 ao_lisp_poly_atom(ao_poly poly)
356 return ao_lisp_ref(poly);
359 static inline ao_poly
360 ao_lisp_atom_poly(struct ao_lisp_atom *a)
362 return ao_lisp_poly(a, AO_LISP_OTHER);
365 static inline struct ao_lisp_builtin *
366 ao_lisp_poly_builtin(ao_poly poly)
368 return ao_lisp_ref(poly);
371 static inline ao_poly
372 ao_lisp_builtin_poly(struct ao_lisp_builtin *b)
374 return ao_lisp_poly(b, AO_LISP_OTHER);
377 /* memory functions */
378 /* returns 1 if the object was already marked */
380 ao_lisp_mark(const struct ao_lisp_type *type, void *addr);
382 /* returns 1 if the object was already marked */
384 ao_lisp_mark_memory(void *addr, int size);
387 ao_lisp_move_map(void *addr);
389 /* returns 1 if the object was already moved */
391 ao_lisp_move(const struct ao_lisp_type *type, void **ref);
393 /* returns 1 if the object was already moved */
395 ao_lisp_move_memory(void **ref, int size);
398 ao_lisp_alloc(int size);
401 ao_lisp_collect(void);
404 ao_lisp_root_add(const struct ao_lisp_type *type, void *addr);
407 ao_lisp_root_poly_add(ao_poly *p);
410 ao_lisp_root_clear(void *addr);
413 extern const struct ao_lisp_type ao_lisp_cons_type;
415 struct ao_lisp_cons *
416 ao_lisp_cons_cons(ao_poly car, struct ao_lisp_cons *cdr);
419 ao_lisp_cons_print(ao_poly);
422 ao_lisp_cons_patom(ao_poly);
425 ao_lisp_cons_length(struct ao_lisp_cons *cons);
428 extern const struct ao_lisp_type ao_lisp_string_type;
431 ao_lisp_string_new(int len);
434 ao_lisp_string_copy(char *a);
437 ao_lisp_string_cat(char *a, char *b);
440 ao_lisp_string_pack(struct ao_lisp_cons *cons);
443 ao_lisp_string_unpack(char *a);
446 ao_lisp_string_print(ao_poly s);
449 ao_lisp_string_patom(ao_poly s);
452 extern const struct ao_lisp_type ao_lisp_atom_type;
454 extern struct ao_lisp_atom *ao_lisp_atoms;
455 extern struct ao_lisp_frame *ao_lisp_frame_global;
456 extern struct ao_lisp_frame *ao_lisp_frame_current;
459 ao_lisp_atom_print(ao_poly a);
461 struct ao_lisp_atom *
462 ao_lisp_atom_intern(char *name);
465 ao_lisp_atom_get(ao_poly atom);
468 ao_lisp_atom_set(ao_poly atom, ao_poly val);
472 ao_lisp_int_print(ao_poly i);
476 ao_lisp_poly_print(ao_poly p);
479 ao_lisp_poly_patom(ao_poly p);
482 ao_lisp_poly_mark(ao_poly p, uint8_t note_cons);
484 /* returns 1 if the object has already been moved */
486 ao_lisp_poly_move(ao_poly *p, uint8_t note_cons);
491 ao_lisp_eval_clear_globals(void);
494 ao_lisp_eval_restart(void);
497 ao_lisp_eval(ao_poly p);
500 ao_lisp_set_cond(struct ao_lisp_cons *cons);
504 ao_lisp_builtin_print(ao_poly b);
506 extern const struct ao_lisp_type ao_lisp_builtin_type;
508 /* Check argument count */
510 ao_lisp_check_argc(ao_poly name, struct ao_lisp_cons *cons, int min, int max);
512 /* Check argument type */
514 ao_lisp_check_argt(ao_poly name, struct ao_lisp_cons *cons, int argc, int type, int nil_ok);
516 /* Fetch an arg (nil if off the end) */
518 ao_lisp_arg(struct ao_lisp_cons *cons, int argc);
521 ao_lisp_args_name(uint8_t args);
529 ao_lisp_read_eval_print(void);
532 extern const struct ao_lisp_type ao_lisp_frame_type;
535 ao_lisp_frame_ref(struct ao_lisp_frame *frame, ao_poly atom);
537 struct ao_lisp_frame *
538 ao_lisp_frame_new(int num);
541 ao_lisp_frame_add(struct ao_lisp_frame **frame, ao_poly atom, ao_poly val);
544 ao_lisp_frame_print(ao_poly p);
547 extern const struct ao_lisp_type ao_lisp_lambda_type;
549 struct ao_lisp_lambda *
550 ao_lisp_lambda_new(ao_poly cons);
553 ao_lisp_lambda_print(ao_poly lambda);
556 ao_lisp_lambda(struct ao_lisp_cons *cons);
559 ao_lisp_lexpr(struct ao_lisp_cons *cons);
562 ao_lisp_nlambda(struct ao_lisp_cons *cons);
565 ao_lisp_macro(struct ao_lisp_cons *cons);
568 ao_lisp_lambda_eval(void);
573 ao_lisp_save(struct ao_lisp_cons *cons);
576 ao_lisp_restore(struct ao_lisp_cons *cons);
581 ao_lisp_stack_print(void);
584 ao_lisp_error(int error, char *format, ...);
586 /* debugging macros */
590 int ao_lisp_stack_depth;
592 #define DBG_INDENT() do { int _s; for(_s = 0; _s < ao_lisp_stack_depth; _s++) printf(" "); } while(0)
593 #define DBG_IN() (++ao_lisp_stack_depth)
594 #define DBG_OUT() (--ao_lisp_stack_depth)
595 #define DBG_RESET() (ao_lisp_stack_depth = 0)
596 #define DBG(...) printf(__VA_ARGS__)
597 #define DBGI(...) do { DBG("%4d: ", __LINE__); DBG_INDENT(); DBG(__VA_ARGS__); } while (0)
598 #define DBG_CONS(a) ao_lisp_cons_print(ao_lisp_cons_poly(a))
599 #define DBG_POLY(a) ao_lisp_poly_print(a)
600 #define OFFSET(a) ((a) ? (int) ((uint8_t *) a - ao_lisp_pool) : -1)
601 #define DBG_STACK() ao_lisp_stack_print()
603 ao_lisp_frames_dump(void)
605 struct ao_lisp_stack *s;
606 DBGI(".. current frame: "); DBG_POLY(ao_lisp_frame_poly(ao_lisp_frame_current)); DBG("\n");
607 for (s = ao_lisp_stack; s; s = ao_lisp_poly_stack(s->prev)) {
608 DBGI(".. stack frame: "); DBG_POLY(s->frame); DBG("\n");
611 #define DBG_FRAMES() ao_lisp_frames_dump()
626 #endif /* _AO_LISP_H_ */