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.
20 #if !defined(AO_LISP_TEST) && !defined(AO_LISP_MAKE_CONST)
22 #define AO_LISP_ALTOS 1
23 #define abort() ao_panic(1)
30 #ifdef AO_LISP_MAKE_CONST
31 #define AO_LISP_POOL_CONST 16384
32 extern uint8_t ao_lisp_const[AO_LISP_POOL_CONST];
33 #define ao_lisp_pool ao_lisp_const
34 #define AO_LISP_POOL AO_LISP_POOL_CONST
36 #define _atom(n) ao_lisp_atom_poly(ao_lisp_atom_intern(n))
38 #define _ao_lisp_atom_quote _atom("quote")
39 #define _ao_lisp_atom_set _atom("set")
40 #define _ao_lisp_atom_setq _atom("setq")
41 #define _ao_lisp_atom_t _atom("t")
42 #define _ao_lisp_atom_car _atom("car")
43 #define _ao_lisp_atom_cdr _atom("cdr")
44 #define _ao_lisp_atom_cons _atom("cons")
45 #define _ao_lisp_atom_cond _atom("cond")
47 #include "ao_lisp_const.h"
49 #define AO_LISP_POOL 16384
51 extern uint8_t ao_lisp_pool[AO_LISP_POOL];
55 #define AO_LISP_CONS 0
57 #define AO_LISP_STRING 2
58 #define AO_LISP_OTHER 3
60 #define AO_LISP_TYPE_MASK 0x0003
61 #define AO_LISP_TYPE_SHIFT 2
62 #define AO_LISP_REF_MASK 0x7ffc
63 #define AO_LISP_CONST 0x8000
65 /* These have a type value at the start of the struct */
66 #define AO_LISP_ATOM 4
67 #define AO_LISP_BUILTIN 5
68 #define AO_LISP_FRAME 6
69 #define AO_LISP_NUM_TYPE 7
73 extern uint16_t ao_lisp_top;
75 #define AO_LISP_OOM 0x01
76 #define AO_LISP_DIVIDE_BY_ZERO 0x02
77 #define AO_LISP_INVALID 0x04
79 extern uint8_t ao_lisp_exception;
81 typedef uint16_t ao_poly;
82 typedef int16_t ao_signed_poly;
85 ao_lisp_is_const(ao_poly poly) {
86 return poly & AO_LISP_CONST;
89 #define AO_LISP_POOL_BASE (ao_lisp_pool - 4)
90 #define AO_LISP_CONST_BASE (ao_lisp_const - 4)
92 #define AO_LISP_IS_CONST(a) (ao_lisp_const <= ((uint8_t *) (a)) && ((uint8_t *) (a)) < ao_lisp_const + AO_LISP_POOL_CONST)
93 #define AO_LISP_IS_POOL(a) (ao_lisp_pool <= ((uint8_t *) (a)) && ((uint8_t *) (a)) < ao_lisp_pool + AO_LISP_POOL)
96 ao_lisp_ref(ao_poly poly) {
99 if (poly == AO_LISP_NIL)
101 if (poly & AO_LISP_CONST)
102 return (void *) (AO_LISP_CONST_BASE + (poly & AO_LISP_REF_MASK));
103 return (void *) (AO_LISP_POOL_BASE + (poly & AO_LISP_REF_MASK));
106 static inline ao_poly
107 ao_lisp_poly(const void *addr, ao_poly type) {
108 const uint8_t *a = addr;
111 if (AO_LISP_IS_CONST(a))
112 return AO_LISP_CONST | (a - AO_LISP_CONST_BASE) | type;
113 return (a - AO_LISP_POOL_BASE) | type;
116 struct ao_lisp_type {
117 void (*mark)(void *addr);
118 int (*size)(void *addr);
119 void (*move)(void *addr);
122 struct ao_lisp_cons {
127 struct ao_lisp_atom {
139 struct ao_lisp_frame {
143 struct ao_lisp_val vals[];
146 static inline struct ao_lisp_frame *
147 ao_lisp_poly_frame(ao_poly poly) {
148 return ao_lisp_ref(poly);
151 static inline ao_poly
152 ao_lisp_frame_poly(struct ao_lisp_frame *frame) {
153 return ao_lisp_poly(frame, AO_LISP_OTHER);
156 #define AO_LISP_LAMBDA 0
157 #define AO_LISP_NLAMBDA 1
158 #define AO_LISP_MACRO 2
159 #define AO_LISP_LEXPR 3
161 struct ao_lisp_builtin {
167 enum ao_lisp_builtin_id {
185 builtin_greater_equal,
189 typedef ao_poly (*ao_lisp_func_t)(struct ao_lisp_cons *cons);
191 extern ao_lisp_func_t ao_lisp_builtins[];
193 static inline ao_lisp_func_t
194 ao_lisp_func(struct ao_lisp_builtin *b)
196 return ao_lisp_builtins[b->func];
200 ao_lisp_poly_other(ao_poly poly) {
201 return ao_lisp_ref(poly);
204 static inline uint8_t
205 ao_lisp_other_type(void *other) {
206 return *((uint8_t *) other);
209 static inline ao_poly
210 ao_lisp_other_poly(const void *other)
212 return ao_lisp_poly(other, AO_LISP_OTHER);
216 ao_lisp_mem_round(int size)
218 return (size + 3) & ~3;
221 #define AO_LISP_OTHER_POLY(other) ((ao_poly)(other) + AO_LISP_OTHER)
223 static inline int ao_lisp_poly_type(ao_poly poly) {
224 int type = poly & AO_LISP_TYPE_MASK;
225 if (type == AO_LISP_OTHER)
226 return ao_lisp_other_type(ao_lisp_poly_other(poly));
230 static inline struct ao_lisp_cons *
231 ao_lisp_poly_cons(ao_poly poly)
233 return ao_lisp_ref(poly);
236 static inline ao_poly
237 ao_lisp_cons_poly(struct ao_lisp_cons *cons)
239 return ao_lisp_poly(cons, AO_LISP_CONS);
243 ao_lisp_poly_int(ao_poly poly)
245 return (int) ((ao_signed_poly) poly >> AO_LISP_TYPE_SHIFT);
248 static inline ao_poly
249 ao_lisp_int_poly(int i)
251 return ((ao_poly) i << 2) | AO_LISP_INT;
255 ao_lisp_poly_string(ao_poly poly)
257 return ao_lisp_ref(poly);
260 static inline ao_poly
261 ao_lisp_string_poly(char *s)
263 return ao_lisp_poly(s, AO_LISP_STRING);
266 static inline struct ao_lisp_atom *
267 ao_lisp_poly_atom(ao_poly poly)
269 return ao_lisp_ref(poly);
272 static inline ao_poly
273 ao_lisp_atom_poly(struct ao_lisp_atom *a)
275 return ao_lisp_poly(a, AO_LISP_OTHER);
278 static inline struct ao_lisp_builtin *
279 ao_lisp_poly_builtin(ao_poly poly)
281 return ao_lisp_ref(poly);
284 static inline ao_poly
285 ao_lisp_builtin_poly(struct ao_lisp_builtin *b)
287 return ao_lisp_poly(b, AO_LISP_OTHER);
290 /* memory functions */
291 /* returns 1 if the object was already marked */
293 ao_lisp_mark(const struct ao_lisp_type *type, void *addr);
295 /* returns 1 if the object was already marked */
297 ao_lisp_mark_memory(void *addr, int size);
300 ao_lisp_move_map(void *addr);
302 /* returns 1 if the object was already moved */
304 ao_lisp_move(const struct ao_lisp_type *type, void **ref);
306 /* returns 1 if the object was already moved */
308 ao_lisp_move_memory(void **ref, int size);
311 ao_lisp_alloc(int size);
314 ao_lisp_collect(void);
317 ao_lisp_root_add(const struct ao_lisp_type *type, void *addr);
320 ao_lisp_root_poly_add(ao_poly *p);
323 ao_lisp_root_clear(void *addr);
326 extern const struct ao_lisp_type ao_lisp_cons_type;
328 struct ao_lisp_cons *
329 ao_lisp_cons_cons(ao_poly car, struct ao_lisp_cons *cdr);
332 ao_lisp_cons_print(ao_poly);
335 extern const struct ao_lisp_type ao_lisp_string_type;
338 ao_lisp_string_new(int len);
341 ao_lisp_string_copy(char *a);
344 ao_lisp_string_cat(char *a, char *b);
347 ao_lisp_string_print(ao_poly s);
350 extern const struct ao_lisp_type ao_lisp_atom_type;
352 extern struct ao_lisp_atom *ao_lisp_atoms;
354 extern struct ao_lisp_frame *ao_lisp_frame_current;
357 ao_lisp_atom_print(ao_poly a);
359 struct ao_lisp_atom *
360 ao_lisp_atom_intern(char *name);
363 ao_lisp_atom_get(ao_poly atom);
366 ao_lisp_atom_set(ao_poly atom, ao_poly val);
370 ao_lisp_int_print(ao_poly i);
374 ao_lisp_poly_print(ao_poly p);
377 ao_lisp_poly_mark(ao_poly p);
379 /* returns 1 if the object has already been moved */
381 ao_lisp_poly_move(ao_poly *p);
386 ao_lisp_eval(ao_poly p);
389 ao_lisp_set_cond(struct ao_lisp_cons *cons);
393 ao_lisp_builtin_print(ao_poly b);
395 extern const struct ao_lisp_type ao_lisp_builtin_type;
397 /* Check argument count */
399 ao_lisp_check_argc(ao_poly name, struct ao_lisp_cons *cons, int min, int max);
401 /* Check argument type */
403 ao_lisp_check_argt(ao_poly name, struct ao_lisp_cons *cons, int argc, int type, int nil_ok);
405 /* Fetch an arg (nil if off the end) */
407 ao_lisp_arg(struct ao_lisp_cons *cons, int argc);
415 ao_lisp_read_eval_print(void);
418 extern const struct ao_lisp_type ao_lisp_frame_type;
421 ao_lisp_frame_ref(struct ao_lisp_frame *frame, ao_poly atom);
423 struct ao_lisp_frame *
424 ao_lisp_frame_new(int num);
426 struct ao_lisp_frame *
427 ao_lisp_frame_add(struct ao_lisp_frame *frame, ao_poly atom, ao_poly val);
432 ao_lisp_error(int error, char *format, ...);
434 #endif /* _AO_LISP_H_ */