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 1024
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) {
97 if (poly == AO_LISP_NIL)
99 if (poly & AO_LISP_CONST)
100 return (void *) (AO_LISP_CONST_BASE + (poly & AO_LISP_REF_MASK));
101 return (void *) (AO_LISP_POOL_BASE + (poly & AO_LISP_REF_MASK));
104 static inline ao_poly
105 ao_lisp_poly(const void *addr, ao_poly type) {
106 const uint8_t *a = addr;
109 if (AO_LISP_IS_CONST(a))
110 return AO_LISP_CONST | (a - AO_LISP_CONST_BASE) | type;
111 return (a - AO_LISP_POOL_BASE) | type;
114 struct ao_lisp_type {
115 void (*mark)(void *addr);
116 int (*size)(void *addr);
117 void (*move)(void *addr);
120 struct ao_lisp_cons {
125 struct ao_lisp_atom {
137 struct ao_lisp_frame {
141 struct ao_lisp_val vals[];
144 static inline struct ao_lisp_frame *
145 ao_lisp_poly_frame(ao_poly poly) {
146 return ao_lisp_ref(poly);
149 static inline ao_poly
150 ao_lisp_frame_poly(struct ao_lisp_frame *frame) {
151 return ao_lisp_poly(frame, AO_LISP_OTHER);
154 #define AO_LISP_LAMBDA 0
155 #define AO_LISP_NLAMBDA 1
156 #define AO_LISP_MACRO 2
157 #define AO_LISP_LEXPR 3
159 struct ao_lisp_builtin {
165 enum ao_lisp_builtin_id {
182 typedef ao_poly (*ao_lisp_func_t)(struct ao_lisp_cons *cons);
184 extern ao_lisp_func_t ao_lisp_builtins[];
186 static inline ao_lisp_func_t
187 ao_lisp_func(struct ao_lisp_builtin *b)
189 return ao_lisp_builtins[b->func];
193 ao_lisp_poly_other(ao_poly poly) {
194 return ao_lisp_ref(poly);
197 static inline uint8_t
198 ao_lisp_other_type(void *other) {
199 return *((uint8_t *) other);
202 static inline ao_poly
203 ao_lisp_other_poly(const void *other)
205 return ao_lisp_poly(other, AO_LISP_OTHER);
209 ao_lisp_mem_round(int size)
211 return (size + 3) & ~3;
214 #define AO_LISP_OTHER_POLY(other) ((ao_poly)(other) + AO_LISP_OTHER)
216 static inline int ao_lisp_poly_type(ao_poly poly) {
217 int type = poly & AO_LISP_TYPE_MASK;
218 if (type == AO_LISP_OTHER)
219 return ao_lisp_other_type(ao_lisp_poly_other(poly));
223 static inline struct ao_lisp_cons *
224 ao_lisp_poly_cons(ao_poly poly)
226 return ao_lisp_ref(poly);
229 static inline ao_poly
230 ao_lisp_cons_poly(struct ao_lisp_cons *cons)
232 return ao_lisp_poly(cons, AO_LISP_CONS);
236 ao_lisp_poly_int(ao_poly poly)
238 return (int) ((ao_signed_poly) poly >> AO_LISP_TYPE_SHIFT);
241 static inline ao_poly
242 ao_lisp_int_poly(int i)
244 return ((ao_poly) i << 2) | AO_LISP_INT;
248 ao_lisp_poly_string(ao_poly poly)
250 return ao_lisp_ref(poly);
253 static inline ao_poly
254 ao_lisp_string_poly(char *s)
256 return ao_lisp_poly(s, AO_LISP_STRING);
259 static inline struct ao_lisp_atom *
260 ao_lisp_poly_atom(ao_poly poly)
262 return ao_lisp_ref(poly);
265 static inline ao_poly
266 ao_lisp_atom_poly(struct ao_lisp_atom *a)
268 return ao_lisp_poly(a, AO_LISP_OTHER);
271 static inline struct ao_lisp_builtin *
272 ao_lisp_poly_builtin(ao_poly poly)
274 return ao_lisp_ref(poly);
277 static inline ao_poly
278 ao_lisp_builtin_poly(struct ao_lisp_builtin *b)
280 return ao_lisp_poly(b, AO_LISP_OTHER);
283 /* memory functions */
285 ao_lisp_mark(const struct ao_lisp_type *type, void *addr);
287 /* returns 1 if the object was already marked */
289 ao_lisp_mark_memory(void *addr, int size);
292 ao_lisp_move_map(void *addr);
295 ao_lisp_move(const struct ao_lisp_type *type, void *addr);
297 /* returns NULL if the object was already moved */
299 ao_lisp_move_memory(void *addr, int size);
302 ao_lisp_alloc(int size);
305 ao_lisp_collect(void);
308 ao_lisp_root_add(const struct ao_lisp_type *type, void *addr);
311 ao_lisp_root_clear(void *addr);
314 extern const struct ao_lisp_type ao_lisp_cons_type;
316 struct ao_lisp_cons *
317 ao_lisp_cons_cons(ao_poly car, struct ao_lisp_cons *cdr);
320 ao_lisp_cons_print(ao_poly);
323 extern const struct ao_lisp_type ao_lisp_string_type;
326 ao_lisp_string_new(int len);
329 ao_lisp_string_copy(char *a);
332 ao_lisp_string_cat(char *a, char *b);
335 ao_lisp_string_print(ao_poly s);
338 extern const struct ao_lisp_type ao_lisp_atom_type;
340 extern struct ao_lisp_atom *ao_lisp_atoms;
342 extern struct ao_lisp_frame *ao_lisp_frame_current;
345 ao_lisp_atom_print(ao_poly a);
347 struct ao_lisp_atom *
348 ao_lisp_atom_intern(char *name);
351 ao_lisp_atom_get(ao_poly atom);
354 ao_lisp_atom_set(ao_poly atom, ao_poly val);
358 ao_lisp_int_print(ao_poly i);
362 ao_lisp_poly_print(ao_poly p);
365 ao_lisp_poly_mark(ao_poly p);
368 ao_lisp_poly_move(ao_poly p);
372 ao_lisp_eval(ao_poly p);
375 ao_lisp_set_cond(struct ao_lisp_cons *cons);
379 ao_lisp_builtin_print(ao_poly b);
381 extern const struct ao_lisp_type ao_lisp_builtin_type;
383 /* Check argument count */
385 ao_lisp_check_argc(ao_poly name, struct ao_lisp_cons *cons, int min, int max);
387 /* Check argument type */
389 ao_lisp_check_argt(ao_poly name, struct ao_lisp_cons *cons, int argc, int type, int nil_ok);
391 /* Fetch an arg (nil if off the end) */
393 ao_lisp_arg(struct ao_lisp_cons *cons, int argc);
401 ao_lisp_read_eval_print(void);
404 extern const struct ao_lisp_type ao_lisp_frame_type;
407 ao_lisp_frame_ref(struct ao_lisp_frame *frame, ao_poly atom);
409 struct ao_lisp_frame *
410 ao_lisp_frame_new(int num, int readonly);
412 struct ao_lisp_frame *
413 ao_lisp_frame_add(struct ao_lisp_frame *frame, ao_poly atom, ao_poly val);
418 ao_lisp_error(int error, char *format, ...);
420 #endif /* _AO_LISP_H_ */