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 #ifdef AO_LISP_MAKE_CONST
24 #define AO_LISP_POOL_CONST 16384
25 extern uint8_t ao_lisp_const[AO_LISP_POOL_CONST];
26 #define ao_lisp_pool ao_lisp_const
27 #define AO_LISP_POOL AO_LISP_POOL_CONST
29 #define _atom(n) ao_lisp_atom_poly(ao_lisp_atom_intern(n))
31 #define _ao_lisp_atom_quote _atom("quote")
32 #define _ao_lisp_atom_set _atom("set")
33 #define _ao_lisp_atom_setq _atom("setq")
34 #define _ao_lisp_atom_t _atom("t")
35 #define _ao_lisp_atom_car _atom("car")
36 #define _ao_lisp_atom_cdr _atom("cdr")
37 #define _ao_lisp_atom_cons _atom("cons")
38 #define _ao_lisp_atom_last _atom("last")
39 #define _ao_lisp_atom_length _atom("length")
40 #define _ao_lisp_atom_cond _atom("cond")
41 #define _ao_lisp_atom_lambda _atom("lambda")
42 #define _ao_lisp_atom_led _atom("led")
43 #define _ao_lisp_atom_delay _atom("delay")
44 #define _ao_lisp_atom_pack _atom("pack")
45 #define _ao_lisp_atom_unpack _atom("unpack")
46 #define _ao_lisp_atom_flush _atom("flush")
47 #define _ao_lisp_atom_eval _atom("eval")
48 #define _ao_lisp_atom_read _atom("read")
49 #define _ao_lisp_atom_eof _atom("eof")
51 #include "ao_lisp_const.h"
53 #define AO_LISP_POOL 16384
55 extern uint8_t ao_lisp_pool[AO_LISP_POOL];
59 #define AO_LISP_CONS 0
61 #define AO_LISP_STRING 2
62 #define AO_LISP_OTHER 3
64 #define AO_LISP_TYPE_MASK 0x0003
65 #define AO_LISP_TYPE_SHIFT 2
66 #define AO_LISP_REF_MASK 0x7ffc
67 #define AO_LISP_CONST 0x8000
69 /* These have a type value at the start of the struct */
70 #define AO_LISP_ATOM 4
71 #define AO_LISP_BUILTIN 5
72 #define AO_LISP_FRAME 6
73 #define AO_LISP_LAMBDA 7
74 #define AO_LISP_NUM_TYPE 8
78 extern uint16_t ao_lisp_top;
80 #define AO_LISP_OOM 0x01
81 #define AO_LISP_DIVIDE_BY_ZERO 0x02
82 #define AO_LISP_INVALID 0x04
83 #define AO_LISP_UNDEFINED 0x08
84 #define AO_LISP_EOF 0x10
86 extern uint8_t ao_lisp_exception;
88 typedef uint16_t ao_poly;
89 typedef int16_t ao_signed_poly;
92 ao_lisp_is_const(ao_poly poly) {
93 return poly & AO_LISP_CONST;
96 #define AO_LISP_POOL_BASE (ao_lisp_pool - 4)
97 #define AO_LISP_CONST_BASE (ao_lisp_const - 4)
99 #define AO_LISP_IS_CONST(a) (ao_lisp_const <= ((uint8_t *) (a)) && ((uint8_t *) (a)) < ao_lisp_const + AO_LISP_POOL_CONST)
100 #define AO_LISP_IS_POOL(a) (ao_lisp_pool <= ((uint8_t *) (a)) && ((uint8_t *) (a)) < ao_lisp_pool + AO_LISP_POOL)
103 ao_lisp_ref(ao_poly poly);
106 ao_lisp_poly(const void *addr, ao_poly type);
108 struct ao_lisp_type {
109 int (*size)(void *addr);
110 void (*mark)(void *addr);
111 void (*move)(void *addr);
114 struct ao_lisp_cons {
119 struct ao_lisp_atom {
131 struct ao_lisp_frame {
135 struct ao_lisp_val vals[];
138 static inline struct ao_lisp_frame *
139 ao_lisp_poly_frame(ao_poly poly) {
140 return ao_lisp_ref(poly);
143 static inline ao_poly
144 ao_lisp_frame_poly(struct ao_lisp_frame *frame) {
145 return ao_lisp_poly(frame, AO_LISP_OTHER);
149 eval_sexpr, /* Evaluate an sexpr */
160 struct ao_lisp_stack {
161 uint8_t state; /* enum eval_state */
162 ao_poly prev; /* previous stack frame */
163 ao_poly sexprs; /* expressions to evaluate */
164 ao_poly values; /* values computed */
165 ao_poly values_tail; /* end of the values list for easy appending */
166 ao_poly frame; /* current lookup frame */
167 ao_poly list; /* most recent function call */
170 static inline struct ao_lisp_stack *
171 ao_lisp_poly_stack(ao_poly p)
173 return ao_lisp_ref(p);
176 static inline ao_poly
177 ao_lisp_stack_poly(struct ao_lisp_stack *stack)
179 return ao_lisp_poly(stack, AO_LISP_OTHER);
182 extern struct ao_lisp_stack *ao_lisp_stack;
183 extern ao_poly ao_lisp_v;
185 #define AO_LISP_FUNC_LAMBDA 0
186 #define AO_LISP_FUNC_NLAMBDA 1
187 #define AO_LISP_FUNC_MACRO 2
188 #define AO_LISP_FUNC_LEXPR 3
190 struct ao_lisp_builtin {
196 enum ao_lisp_builtin_id {
225 builtin_greater_equal,
234 typedef ao_poly (*ao_lisp_func_t)(struct ao_lisp_cons *cons);
236 extern const ao_lisp_func_t ao_lisp_builtins[];
238 static inline ao_lisp_func_t
239 ao_lisp_func(struct ao_lisp_builtin *b)
241 return ao_lisp_builtins[b->func];
244 struct ao_lisp_lambda {
251 static inline struct ao_lisp_lambda *
252 ao_lisp_poly_lambda(ao_poly poly)
254 return ao_lisp_ref(poly);
257 static inline ao_poly
258 ao_lisp_lambda_poly(struct ao_lisp_lambda *lambda)
260 return ao_lisp_poly(lambda, AO_LISP_OTHER);
264 ao_lisp_poly_other(ao_poly poly) {
265 return ao_lisp_ref(poly);
268 static inline uint8_t
269 ao_lisp_other_type(void *other) {
270 return *((uint8_t *) other);
273 static inline ao_poly
274 ao_lisp_other_poly(const void *other)
276 return ao_lisp_poly(other, AO_LISP_OTHER);
280 ao_lisp_mem_round(int size)
282 return (size + 3) & ~3;
285 #define AO_LISP_OTHER_POLY(other) ((ao_poly)(other) + AO_LISP_OTHER)
287 static inline int ao_lisp_poly_base_type(ao_poly poly) {
288 return poly & AO_LISP_TYPE_MASK;
291 static inline int ao_lisp_poly_type(ao_poly poly) {
292 int type = poly & AO_LISP_TYPE_MASK;
293 if (type == AO_LISP_OTHER)
294 return ao_lisp_other_type(ao_lisp_poly_other(poly));
298 static inline struct ao_lisp_cons *
299 ao_lisp_poly_cons(ao_poly poly)
301 return ao_lisp_ref(poly);
304 static inline ao_poly
305 ao_lisp_cons_poly(struct ao_lisp_cons *cons)
307 return ao_lisp_poly(cons, AO_LISP_CONS);
311 ao_lisp_poly_int(ao_poly poly)
313 return (int) ((ao_signed_poly) poly >> AO_LISP_TYPE_SHIFT);
316 static inline ao_poly
317 ao_lisp_int_poly(int i)
319 return ((ao_poly) i << 2) | AO_LISP_INT;
323 ao_lisp_poly_string(ao_poly poly)
325 return ao_lisp_ref(poly);
328 static inline ao_poly
329 ao_lisp_string_poly(char *s)
331 return ao_lisp_poly(s, AO_LISP_STRING);
334 static inline struct ao_lisp_atom *
335 ao_lisp_poly_atom(ao_poly poly)
337 return ao_lisp_ref(poly);
340 static inline ao_poly
341 ao_lisp_atom_poly(struct ao_lisp_atom *a)
343 return ao_lisp_poly(a, AO_LISP_OTHER);
346 static inline struct ao_lisp_builtin *
347 ao_lisp_poly_builtin(ao_poly poly)
349 return ao_lisp_ref(poly);
352 static inline ao_poly
353 ao_lisp_builtin_poly(struct ao_lisp_builtin *b)
355 return ao_lisp_poly(b, AO_LISP_OTHER);
358 /* memory functions */
359 /* returns 1 if the object was already marked */
361 ao_lisp_mark(const struct ao_lisp_type *type, void *addr);
363 /* returns 1 if the object was already marked */
365 ao_lisp_mark_memory(void *addr, int size);
368 ao_lisp_move_map(void *addr);
370 /* returns 1 if the object was already moved */
372 ao_lisp_move(const struct ao_lisp_type *type, void **ref);
374 /* returns 1 if the object was already moved */
376 ao_lisp_move_memory(void **ref, int size);
379 ao_lisp_alloc(int size);
382 ao_lisp_collect(void);
385 ao_lisp_root_add(const struct ao_lisp_type *type, void *addr);
388 ao_lisp_root_poly_add(ao_poly *p);
391 ao_lisp_root_clear(void *addr);
394 extern const struct ao_lisp_type ao_lisp_cons_type;
396 struct ao_lisp_cons *
397 ao_lisp_cons_cons(ao_poly car, struct ao_lisp_cons *cdr);
400 ao_lisp_cons_print(ao_poly);
403 ao_lisp_cons_patom(ao_poly);
406 ao_lisp_cons_length(struct ao_lisp_cons *cons);
409 extern const struct ao_lisp_type ao_lisp_string_type;
412 ao_lisp_string_new(int len);
415 ao_lisp_string_copy(char *a);
418 ao_lisp_string_cat(char *a, char *b);
421 ao_lisp_string_pack(struct ao_lisp_cons *cons);
424 ao_lisp_string_unpack(char *a);
427 ao_lisp_string_print(ao_poly s);
430 ao_lisp_string_patom(ao_poly s);
433 extern const struct ao_lisp_type ao_lisp_atom_type;
435 extern struct ao_lisp_atom *ao_lisp_atoms;
436 extern struct ao_lisp_frame *ao_lisp_frame_global;
437 extern struct ao_lisp_frame *ao_lisp_frame_current;
440 ao_lisp_atom_print(ao_poly a);
442 struct ao_lisp_atom *
443 ao_lisp_atom_intern(char *name);
446 ao_lisp_atom_get(ao_poly atom);
449 ao_lisp_atom_set(ao_poly atom, ao_poly val);
453 ao_lisp_int_print(ao_poly i);
457 ao_lisp_poly_print(ao_poly p);
460 ao_lisp_poly_patom(ao_poly p);
463 ao_lisp_poly_mark(ao_poly p, uint8_t note_cons);
465 /* returns 1 if the object has already been moved */
467 ao_lisp_poly_move(ao_poly *p, uint8_t note_cons);
472 ao_lisp_eval(ao_poly p);
475 ao_lisp_set_cond(struct ao_lisp_cons *cons);
479 ao_lisp_builtin_print(ao_poly b);
481 extern const struct ao_lisp_type ao_lisp_builtin_type;
483 /* Check argument count */
485 ao_lisp_check_argc(ao_poly name, struct ao_lisp_cons *cons, int min, int max);
487 /* Check argument type */
489 ao_lisp_check_argt(ao_poly name, struct ao_lisp_cons *cons, int argc, int type, int nil_ok);
491 /* Fetch an arg (nil if off the end) */
493 ao_lisp_arg(struct ao_lisp_cons *cons, int argc);
496 ao_lisp_args_name(uint8_t args);
504 ao_lisp_read_eval_print(void);
507 extern const struct ao_lisp_type ao_lisp_frame_type;
510 ao_lisp_frame_ref(struct ao_lisp_frame *frame, ao_poly atom);
512 struct ao_lisp_frame *
513 ao_lisp_frame_new(int num);
516 ao_lisp_frame_add(struct ao_lisp_frame **frame, ao_poly atom, ao_poly val);
519 ao_lisp_frame_print(ao_poly p);
522 extern const struct ao_lisp_type ao_lisp_lambda_type;
524 struct ao_lisp_lambda *
525 ao_lisp_lambda_new(ao_poly cons);
528 ao_lisp_lambda_print(ao_poly lambda);
531 ao_lisp_lambda(struct ao_lisp_cons *cons);
534 ao_lisp_lexpr(struct ao_lisp_cons *cons);
537 ao_lisp_nlambda(struct ao_lisp_cons *cons);
540 ao_lisp_macro(struct ao_lisp_cons *cons);
543 ao_lisp_lambda_eval(void);
548 ao_lisp_stack_print(void);
551 ao_lisp_error(int error, char *format, ...);
553 /* debugging macros */
557 int ao_lisp_stack_depth;
559 #define DBG_INDENT() do { int _s; for(_s = 0; _s < ao_lisp_stack_depth; _s++) printf(" "); } while(0)
560 #define DBG_IN() (++ao_lisp_stack_depth)
561 #define DBG_OUT() (--ao_lisp_stack_depth)
562 #define DBG_RESET() (ao_lisp_stack_depth = 0)
563 #define DBG(...) printf(__VA_ARGS__)
564 #define DBGI(...) do { DBG("%4d: ", __LINE__); DBG_INDENT(); DBG(__VA_ARGS__); } while (0)
565 #define DBG_CONS(a) ao_lisp_cons_print(ao_lisp_cons_poly(a))
566 #define DBG_POLY(a) ao_lisp_poly_print(a)
567 #define OFFSET(a) ((a) ? (int) ((uint8_t *) a - ao_lisp_pool) : -1)
568 #define DBG_STACK() ao_lisp_stack_print()
570 ao_lisp_frames_dump(void)
572 struct ao_lisp_stack *s;
573 DBGI(".. current frame: "); DBG_POLY(ao_lisp_frame_poly(ao_lisp_frame_current)); DBG("\n");
574 for (s = ao_lisp_stack; s; s = ao_lisp_poly_stack(s->prev)) {
575 DBGI(".. stack frame: "); DBG_POLY(s->frame); DBG("\n");
578 #define DBG_FRAMES() ao_lisp_frames_dump()
593 #endif /* _AO_LISP_H_ */