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 {
31 uint16_t const_checksum;
32 uint16_t const_checksum_inv;
35 #define AO_LISP_POOL_EXTRA (sizeof(struct ao_lisp_os_save))
36 #define AO_LISP_POOL ((int) (AO_LISP_POOL_TOTAL - AO_LISP_POOL_EXTRA))
39 ao_lisp_os_save(void);
42 ao_lisp_os_restore_save(struct ao_lisp_os_save *save, int offset);
45 ao_lisp_os_restore(void);
49 #ifdef AO_LISP_MAKE_CONST
50 #define AO_LISP_POOL_CONST 16384
51 extern uint8_t ao_lisp_const[AO_LISP_POOL_CONST];
52 #define ao_lisp_pool ao_lisp_const
53 #define AO_LISP_POOL AO_LISP_POOL_CONST
55 #define _atom(n) ao_lisp_atom_poly(ao_lisp_atom_intern(n))
57 #define _ao_lisp_atom_quote _atom("quote")
58 #define _ao_lisp_atom_set _atom("set")
59 #define _ao_lisp_atom_setq _atom("setq")
60 #define _ao_lisp_atom_t _atom("t")
61 #define _ao_lisp_atom_car _atom("car")
62 #define _ao_lisp_atom_cdr _atom("cdr")
63 #define _ao_lisp_atom_cons _atom("cons")
64 #define _ao_lisp_atom_last _atom("last")
65 #define _ao_lisp_atom_length _atom("length")
66 #define _ao_lisp_atom_cond _atom("cond")
67 #define _ao_lisp_atom_lambda _atom("lambda")
68 #define _ao_lisp_atom_led _atom("led")
69 #define _ao_lisp_atom_delay _atom("delay")
70 #define _ao_lisp_atom_pack _atom("pack")
71 #define _ao_lisp_atom_unpack _atom("unpack")
72 #define _ao_lisp_atom_flush _atom("flush")
73 #define _ao_lisp_atom_eval _atom("eval")
74 #define _ao_lisp_atom_read _atom("read")
75 #define _ao_lisp_atom_eof _atom("eof")
76 #define _ao_lisp_atom_save _atom("save")
77 #define _ao_lisp_atom_restore _atom("restore")
79 #include "ao_lisp_const.h"
81 #define AO_LISP_POOL 3072
83 extern uint8_t ao_lisp_pool[AO_LISP_POOL + AO_LISP_POOL_EXTRA];
87 #define AO_LISP_CONS 0
89 #define AO_LISP_STRING 2
90 #define AO_LISP_OTHER 3
92 #define AO_LISP_TYPE_MASK 0x0003
93 #define AO_LISP_TYPE_SHIFT 2
94 #define AO_LISP_REF_MASK 0x7ffc
95 #define AO_LISP_CONST 0x8000
97 /* These have a type value at the start of the struct */
98 #define AO_LISP_ATOM 4
99 #define AO_LISP_BUILTIN 5
100 #define AO_LISP_FRAME 6
101 #define AO_LISP_LAMBDA 7
102 #define AO_LISP_NUM_TYPE 8
104 #define AO_LISP_NIL 0
106 extern uint16_t ao_lisp_top;
108 #define AO_LISP_OOM 0x01
109 #define AO_LISP_DIVIDE_BY_ZERO 0x02
110 #define AO_LISP_INVALID 0x04
111 #define AO_LISP_UNDEFINED 0x08
112 #define AO_LISP_EOF 0x10
114 extern uint8_t ao_lisp_exception;
117 ao_lisp_is_const(ao_poly poly) {
118 return poly & AO_LISP_CONST;
121 #define AO_LISP_POOL_BASE (ao_lisp_pool - 4)
122 #define AO_LISP_CONST_BASE (ao_lisp_const - 4)
124 #define AO_LISP_IS_CONST(a) (ao_lisp_const <= ((uint8_t *) (a)) && ((uint8_t *) (a)) < ao_lisp_const + AO_LISP_POOL_CONST)
125 #define AO_LISP_IS_POOL(a) (ao_lisp_pool <= ((uint8_t *) (a)) && ((uint8_t *) (a)) < ao_lisp_pool + AO_LISP_POOL)
128 ao_lisp_ref(ao_poly poly);
131 ao_lisp_poly(const void *addr, ao_poly type);
133 struct ao_lisp_type {
134 int (*size)(void *addr);
135 void (*mark)(void *addr);
136 void (*move)(void *addr);
139 struct ao_lisp_cons {
144 struct ao_lisp_atom {
156 struct ao_lisp_frame {
160 struct ao_lisp_val vals[];
163 static inline struct ao_lisp_frame *
164 ao_lisp_poly_frame(ao_poly poly) {
165 return ao_lisp_ref(poly);
168 static inline ao_poly
169 ao_lisp_frame_poly(struct ao_lisp_frame *frame) {
170 return ao_lisp_poly(frame, AO_LISP_OTHER);
174 eval_sexpr, /* Evaluate an sexpr */
185 struct ao_lisp_stack {
186 uint8_t state; /* enum eval_state */
187 ao_poly prev; /* previous stack frame */
188 ao_poly sexprs; /* expressions to evaluate */
189 ao_poly values; /* values computed */
190 ao_poly values_tail; /* end of the values list for easy appending */
191 ao_poly frame; /* current lookup frame */
192 ao_poly list; /* most recent function call */
195 static inline struct ao_lisp_stack *
196 ao_lisp_poly_stack(ao_poly p)
198 return ao_lisp_ref(p);
201 static inline ao_poly
202 ao_lisp_stack_poly(struct ao_lisp_stack *stack)
204 return ao_lisp_poly(stack, AO_LISP_OTHER);
207 extern struct ao_lisp_stack *ao_lisp_stack;
208 extern ao_poly ao_lisp_v;
210 #define AO_LISP_FUNC_LAMBDA 0
211 #define AO_LISP_FUNC_NLAMBDA 1
212 #define AO_LISP_FUNC_MACRO 2
213 #define AO_LISP_FUNC_LEXPR 3
215 struct ao_lisp_builtin {
221 enum ao_lisp_builtin_id {
250 builtin_greater_equal,
261 typedef ao_poly (*ao_lisp_func_t)(struct ao_lisp_cons *cons);
263 extern const ao_lisp_func_t ao_lisp_builtins[];
265 static inline ao_lisp_func_t
266 ao_lisp_func(struct ao_lisp_builtin *b)
268 return ao_lisp_builtins[b->func];
271 struct ao_lisp_lambda {
278 static inline struct ao_lisp_lambda *
279 ao_lisp_poly_lambda(ao_poly poly)
281 return ao_lisp_ref(poly);
284 static inline ao_poly
285 ao_lisp_lambda_poly(struct ao_lisp_lambda *lambda)
287 return ao_lisp_poly(lambda, AO_LISP_OTHER);
291 ao_lisp_poly_other(ao_poly poly) {
292 return ao_lisp_ref(poly);
295 static inline uint8_t
296 ao_lisp_other_type(void *other) {
297 return *((uint8_t *) other);
300 static inline ao_poly
301 ao_lisp_other_poly(const void *other)
303 return ao_lisp_poly(other, AO_LISP_OTHER);
307 ao_lisp_mem_round(int size)
309 return (size + 3) & ~3;
312 #define AO_LISP_OTHER_POLY(other) ((ao_poly)(other) + AO_LISP_OTHER)
314 static inline int ao_lisp_poly_base_type(ao_poly poly) {
315 return poly & AO_LISP_TYPE_MASK;
318 static inline int ao_lisp_poly_type(ao_poly poly) {
319 int type = poly & AO_LISP_TYPE_MASK;
320 if (type == AO_LISP_OTHER)
321 return ao_lisp_other_type(ao_lisp_poly_other(poly));
325 static inline struct ao_lisp_cons *
326 ao_lisp_poly_cons(ao_poly poly)
328 return ao_lisp_ref(poly);
331 static inline ao_poly
332 ao_lisp_cons_poly(struct ao_lisp_cons *cons)
334 return ao_lisp_poly(cons, AO_LISP_CONS);
338 ao_lisp_poly_int(ao_poly poly)
340 return (int) ((ao_signed_poly) poly >> AO_LISP_TYPE_SHIFT);
343 static inline ao_poly
344 ao_lisp_int_poly(int i)
346 return ((ao_poly) i << 2) | AO_LISP_INT;
350 ao_lisp_poly_string(ao_poly poly)
352 return ao_lisp_ref(poly);
355 static inline ao_poly
356 ao_lisp_string_poly(char *s)
358 return ao_lisp_poly(s, AO_LISP_STRING);
361 static inline struct ao_lisp_atom *
362 ao_lisp_poly_atom(ao_poly poly)
364 return ao_lisp_ref(poly);
367 static inline ao_poly
368 ao_lisp_atom_poly(struct ao_lisp_atom *a)
370 return ao_lisp_poly(a, AO_LISP_OTHER);
373 static inline struct ao_lisp_builtin *
374 ao_lisp_poly_builtin(ao_poly poly)
376 return ao_lisp_ref(poly);
379 static inline ao_poly
380 ao_lisp_builtin_poly(struct ao_lisp_builtin *b)
382 return ao_lisp_poly(b, AO_LISP_OTHER);
385 /* memory functions */
386 /* returns 1 if the object was already marked */
388 ao_lisp_mark(const struct ao_lisp_type *type, void *addr);
390 /* returns 1 if the object was already marked */
392 ao_lisp_mark_memory(void *addr, int size);
395 ao_lisp_move_map(void *addr);
397 /* returns 1 if the object was already moved */
399 ao_lisp_move(const struct ao_lisp_type *type, void **ref);
401 /* returns 1 if the object was already moved */
403 ao_lisp_move_memory(void **ref, int size);
406 ao_lisp_alloc(int size);
409 ao_lisp_collect(void);
412 ao_lisp_root_add(const struct ao_lisp_type *type, void *addr);
415 ao_lisp_root_poly_add(ao_poly *p);
418 ao_lisp_root_clear(void *addr);
421 extern const struct ao_lisp_type ao_lisp_cons_type;
423 struct ao_lisp_cons *
424 ao_lisp_cons_cons(ao_poly car, struct ao_lisp_cons *cdr);
427 ao_lisp_cons_print(ao_poly);
430 ao_lisp_cons_patom(ao_poly);
433 ao_lisp_cons_length(struct ao_lisp_cons *cons);
436 extern const struct ao_lisp_type ao_lisp_string_type;
439 ao_lisp_string_new(int len);
442 ao_lisp_string_copy(char *a);
445 ao_lisp_string_cat(char *a, char *b);
448 ao_lisp_string_pack(struct ao_lisp_cons *cons);
451 ao_lisp_string_unpack(char *a);
454 ao_lisp_string_print(ao_poly s);
457 ao_lisp_string_patom(ao_poly s);
460 extern const struct ao_lisp_type ao_lisp_atom_type;
462 extern struct ao_lisp_atom *ao_lisp_atoms;
463 extern struct ao_lisp_frame *ao_lisp_frame_global;
464 extern struct ao_lisp_frame *ao_lisp_frame_current;
467 ao_lisp_atom_print(ao_poly a);
469 struct ao_lisp_atom *
470 ao_lisp_atom_intern(char *name);
473 ao_lisp_atom_get(ao_poly atom);
476 ao_lisp_atom_set(ao_poly atom, ao_poly val);
480 ao_lisp_int_print(ao_poly i);
484 ao_lisp_poly_print(ao_poly p);
487 ao_lisp_poly_patom(ao_poly p);
490 ao_lisp_poly_mark(ao_poly p, uint8_t note_cons);
492 /* returns 1 if the object has already been moved */
494 ao_lisp_poly_move(ao_poly *p, uint8_t note_cons);
499 ao_lisp_eval_clear_globals(void);
502 ao_lisp_eval_restart(void);
505 ao_lisp_eval(ao_poly p);
508 ao_lisp_set_cond(struct ao_lisp_cons *cons);
512 ao_lisp_builtin_print(ao_poly b);
514 extern const struct ao_lisp_type ao_lisp_builtin_type;
516 /* Check argument count */
518 ao_lisp_check_argc(ao_poly name, struct ao_lisp_cons *cons, int min, int max);
520 /* Check argument type */
522 ao_lisp_check_argt(ao_poly name, struct ao_lisp_cons *cons, int argc, int type, int nil_ok);
524 /* Fetch an arg (nil if off the end) */
526 ao_lisp_arg(struct ao_lisp_cons *cons, int argc);
529 ao_lisp_args_name(uint8_t args);
537 ao_lisp_read_eval_print(void);
540 extern const struct ao_lisp_type ao_lisp_frame_type;
543 ao_lisp_frame_ref(struct ao_lisp_frame *frame, ao_poly atom);
545 struct ao_lisp_frame *
546 ao_lisp_frame_new(int num);
549 ao_lisp_frame_add(struct ao_lisp_frame **frame, ao_poly atom, ao_poly val);
552 ao_lisp_frame_print(ao_poly p);
555 extern const struct ao_lisp_type ao_lisp_lambda_type;
557 struct ao_lisp_lambda *
558 ao_lisp_lambda_new(ao_poly cons);
561 ao_lisp_lambda_print(ao_poly lambda);
564 ao_lisp_lambda(struct ao_lisp_cons *cons);
567 ao_lisp_lexpr(struct ao_lisp_cons *cons);
570 ao_lisp_nlambda(struct ao_lisp_cons *cons);
573 ao_lisp_macro(struct ao_lisp_cons *cons);
576 ao_lisp_lambda_eval(void);
581 ao_lisp_save(struct ao_lisp_cons *cons);
584 ao_lisp_restore(struct ao_lisp_cons *cons);
589 ao_lisp_stack_print(void);
592 ao_lisp_error(int error, char *format, ...);
594 /* debugging macros */
598 int ao_lisp_stack_depth;
600 #define DBG_INDENT() do { int _s; for(_s = 0; _s < ao_lisp_stack_depth; _s++) printf(" "); } while(0)
601 #define DBG_IN() (++ao_lisp_stack_depth)
602 #define DBG_OUT() (--ao_lisp_stack_depth)
603 #define DBG_RESET() (ao_lisp_stack_depth = 0)
604 #define DBG(...) printf(__VA_ARGS__)
605 #define DBGI(...) do { DBG("%4d: ", __LINE__); DBG_INDENT(); DBG(__VA_ARGS__); } while (0)
606 #define DBG_CONS(a) ao_lisp_cons_print(ao_lisp_cons_poly(a))
607 #define DBG_POLY(a) ao_lisp_poly_print(a)
608 #define OFFSET(a) ((a) ? (int) ((uint8_t *) a - ao_lisp_pool) : -1)
609 #define DBG_STACK() ao_lisp_stack_print()
611 ao_lisp_frames_dump(void)
613 struct ao_lisp_stack *s;
614 DBGI(".. current frame: "); DBG_POLY(ao_lisp_frame_poly(ao_lisp_frame_current)); DBG("\n");
615 for (s = ao_lisp_stack; s; s = ao_lisp_poly_stack(s->prev)) {
616 DBGI(".. stack frame: "); DBG_POLY(s->frame); DBG("\n");
619 #define DBG_FRAMES() ao_lisp_frames_dump()
634 #endif /* _AO_LISP_H_ */