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 static struct ao_lisp_builtin *
22 ao_lisp_make_builtin(enum ao_lisp_builtin_id func, int args) {
23 struct ao_lisp_builtin *b = ao_lisp_alloc(sizeof (struct ao_lisp_builtin));
25 b->type = AO_LISP_BUILTIN;
37 struct builtin_func funcs[] = {
38 { .name = "eval", .args = AO_LISP_FUNC_F_LAMBDA, .func = builtin_eval },
39 { .name = "read", .args = AO_LISP_FUNC_F_LAMBDA, .func = builtin_read },
40 { .name = "lambda", .args = AO_LISP_FUNC_NLAMBDA, .func = builtin_lambda },
41 { .name = "lexpr", .args = AO_LISP_FUNC_NLAMBDA, .func = builtin_lexpr },
42 { .name = "nlambda", .args = AO_LISP_FUNC_NLAMBDA, .func = builtin_nlambda },
43 { .name = "macro", .args = AO_LISP_FUNC_NLAMBDA, .func = builtin_macro },
44 { .name = "car", .args = AO_LISP_FUNC_F_LAMBDA, .func = builtin_car },
45 { .name = "cdr", .args = AO_LISP_FUNC_F_LAMBDA, .func = builtin_cdr },
46 { .name = "cons", .args = AO_LISP_FUNC_F_LAMBDA, .func = builtin_cons },
47 { .name = "last", .args = AO_LISP_FUNC_F_LAMBDA, .func = builtin_last },
48 { .name = "length", .args = AO_LISP_FUNC_F_LAMBDA, .func = builtin_length },
49 { .name = "quote", .args = AO_LISP_FUNC_NLAMBDA, .func = builtin_quote },
50 { .name = "set", .args = AO_LISP_FUNC_F_LAMBDA, .func = builtin_set },
51 { .name = "setq", .args = AO_LISP_FUNC_MACRO, .func = builtin_setq },
52 { .name = "cond", .args = AO_LISP_FUNC_NLAMBDA, .func = builtin_cond },
53 { .name = "progn", .args = AO_LISP_FUNC_NLAMBDA, .func = builtin_progn },
54 { .name = "while", .args = AO_LISP_FUNC_NLAMBDA, .func = builtin_while },
55 { .name = "print", .args = AO_LISP_FUNC_F_LEXPR, .func = builtin_print },
56 { .name = "patom", .args = AO_LISP_FUNC_F_LEXPR, .func = builtin_patom },
57 { .name = "+", .args = AO_LISP_FUNC_F_LEXPR, .func = builtin_plus },
58 { .name = "-", .args = AO_LISP_FUNC_F_LEXPR, .func = builtin_minus },
59 { .name = "*", .args = AO_LISP_FUNC_F_LEXPR, .func = builtin_times },
60 { .name = "/", .args = AO_LISP_FUNC_F_LEXPR, .func = builtin_divide },
61 { .name = "%", .args = AO_LISP_FUNC_F_LEXPR, .func = builtin_mod },
62 { .name = "=", .args = AO_LISP_FUNC_F_LEXPR, .func = builtin_equal },
63 { .name = "<", .args = AO_LISP_FUNC_F_LEXPR, .func = builtin_less },
64 { .name = ">", .args = AO_LISP_FUNC_F_LEXPR, .func = builtin_greater },
65 { .name = "<=", .args = AO_LISP_FUNC_F_LEXPR, .func = builtin_less_equal },
66 { .name = ">=", .args = AO_LISP_FUNC_F_LEXPR, .func = builtin_greater_equal },
67 { .name = "pack", .args = AO_LISP_FUNC_F_LAMBDA, .func = builtin_pack },
68 { .name = "unpack", .args = AO_LISP_FUNC_F_LAMBDA, .func = builtin_unpack },
69 { .name = "flush", .args = AO_LISP_FUNC_F_LAMBDA, .func = builtin_flush },
70 { .name = "delay", .args = AO_LISP_FUNC_F_LAMBDA, .func = builtin_delay },
71 { .name = "led", .args = AO_LISP_FUNC_F_LEXPR, .func = builtin_led },
72 { .name = "save", .args = AO_LISP_FUNC_F_LAMBDA, .func = builtin_save },
73 { .name = "restore", .args = AO_LISP_FUNC_F_LAMBDA, .func = builtin_restore },
76 #define N_FUNC (sizeof funcs / sizeof funcs[0])
78 struct ao_lisp_frame *globals;
83 struct ao_lisp_atom *a;
85 for (a = ao_lisp_atoms; a; a = ao_lisp_poly_atom(a->next))
86 if (((uint8_t *) a->name - ao_lisp_const) == offset)
87 return strlen(a->name);
91 #define AO_FEC_CRC_INIT 0xffff
93 static inline uint16_t
94 ao_fec_crc_byte(uint8_t byte, uint16_t crc)
98 for (bit = 0; bit < 8; bit++) {
99 if (((crc & 0x8000) >> 8) ^ (byte & 0x80))
100 crc = (crc << 1) ^ 0x8005;
109 ao_fec_crc(const uint8_t *bytes, uint8_t len)
111 uint16_t crc = AO_FEC_CRC_INIT;
114 crc = ao_fec_crc_byte(*bytes++, crc);
118 struct ao_lisp_macro_stack {
119 struct ao_lisp_macro_stack *next;
123 struct ao_lisp_macro_stack *macro_stack;
126 ao_lisp_macro_push(ao_poly p)
128 struct ao_lisp_macro_stack *m = macro_stack;
135 m = malloc (sizeof (struct ao_lisp_macro_stack));
137 m->next = macro_stack;
143 ao_lisp_macro_pop(void)
145 struct ao_lisp_macro_stack *m = macro_stack;
147 macro_stack = m->next;
153 int macro_scan_depth;
158 for (i = 0; i < macro_scan_depth; i++)
161 #define MACRO_DEBUG(a) a
163 #define MACRO_DEBUG(a)
167 ao_has_macro(ao_poly p);
170 ao_macro_test_get(ao_poly atom)
172 ao_poly *ref = ao_lisp_atom_ref(ao_lisp_frame_global, atom);
179 ao_is_macro(ao_poly p)
181 struct ao_lisp_builtin *builtin;
182 struct ao_lisp_lambda *lambda;
185 MACRO_DEBUG(indent(); printf ("is macro "); ao_lisp_poly_print(p); printf("\n"); ++macro_scan_depth);
186 switch (ao_lisp_poly_type(p)) {
188 if (ao_lisp_macro_push(p))
191 if (ao_is_macro(ao_macro_test_get(p)))
199 ret = ao_has_macro(p);
201 case AO_LISP_BUILTIN:
202 builtin = ao_lisp_poly_builtin(p);
203 if ((builtin->args & AO_LISP_FUNC_MASK) == AO_LISP_FUNC_MACRO)
210 lambda = ao_lisp_poly_lambda(p);
211 if (lambda->args == AO_LISP_FUNC_MACRO)
214 ret = ao_has_macro(lambda->code);
220 MACRO_DEBUG(--macro_scan_depth; indent(); printf ("... "); ao_lisp_poly_print(ret); printf("\n"));
225 ao_has_macro(ao_poly p)
227 struct ao_lisp_cons *cons;
228 struct ao_lisp_lambda *lambda;
231 if (p == AO_LISP_NIL)
234 MACRO_DEBUG(indent(); printf("has macro "); ao_lisp_poly_print(p); printf("\n"); ++macro_scan_depth);
235 switch (ao_lisp_poly_type(p)) {
237 lambda = ao_lisp_poly_lambda(p);
238 p = ao_has_macro(lambda->code);
241 cons = ao_lisp_poly_cons(p);
242 if ((p = ao_is_macro(cons->car)))
245 cons = ao_lisp_poly_cons(cons->cdr);
248 m = ao_has_macro(cons->car);
253 cons = ao_lisp_poly_cons(cons->cdr);
261 MACRO_DEBUG(--macro_scan_depth; indent(); printf("... "); ao_lisp_poly_print(p); printf("\n"));
266 ao_lisp_read_eval_abort(void)
268 ao_poly in, out = AO_LISP_NIL;
271 if (in == _ao_lisp_atom_eof)
273 out = ao_lisp_eval(in);
274 if (ao_lisp_exception)
276 ao_lisp_poly_print(out);
291 static const struct option options[] = {
292 { .name = "out", .has_arg = 1, .val = 'o' },
296 static void usage(char *program)
298 fprintf(stderr, "usage: %s [--out=<output>] [input]\n", program);
303 main(int argc, char **argv)
307 struct ao_lisp_atom *a;
308 struct ao_lisp_builtin *b;
310 char *out_name = NULL;
316 while ((c = getopt_long(argc, argv, "o:", options, NULL)) != -1) {
327 for (f = 0; f < (int) N_FUNC; f++) {
328 b = ao_lisp_make_builtin(funcs[f].func, funcs[f].args);
329 a = ao_lisp_atom_intern(funcs[f].name);
330 ao_lisp_atom_set(ao_lisp_atom_poly(a),
331 ao_lisp_builtin_poly(b));
334 /* boolean constants */
335 ao_lisp_atom_set(ao_lisp_atom_poly(ao_lisp_atom_intern("nil")),
337 a = ao_lisp_atom_intern("t");
338 ao_lisp_atom_set(ao_lisp_atom_poly(a),
339 ao_lisp_atom_poly(a));
341 /* end of file value */
342 a = ao_lisp_atom_intern("eof");
343 ao_lisp_atom_set(ao_lisp_atom_poly(a),
344 ao_lisp_atom_poly(a));
347 in = fopen(argv[optind], "r");
349 perror(argv[optind]);
353 if (!ao_lisp_read_eval_abort()) {
354 fprintf(stderr, "eval failed\n");
358 /* Reduce to referenced values */
359 ao_lisp_collect(AO_LISP_COLLECT_FULL);
361 for (f = 0; f < ao_lisp_frame_num(ao_lisp_frame_global); f++) {
362 val = ao_has_macro(ao_lisp_frame_global->vals[f].val);
363 if (val != AO_LISP_NIL) {
364 printf("error: function %s contains unresolved macro: ",
365 ao_lisp_poly_atom(ao_lisp_frame_global->vals[f].atom)->name);
366 ao_lisp_poly_print(val);
373 out = fopen(out_name, "w");
380 fprintf(out, "/* Generated file, do not edit */\n\n");
382 fprintf(out, "#define AO_LISP_POOL_CONST %d\n", ao_lisp_top);
383 fprintf(out, "extern const uint8_t ao_lisp_const[AO_LISP_POOL_CONST] __attribute__((aligned(4)));\n");
384 fprintf(out, "#define ao_builtin_atoms 0x%04x\n", ao_lisp_atom_poly(ao_lisp_atoms));
385 fprintf(out, "#define ao_builtin_frame 0x%04x\n", ao_lisp_frame_poly(ao_lisp_frame_global));
386 fprintf(out, "#define ao_lisp_const_checksum ((uint16_t) 0x%04x)\n", ao_fec_crc(ao_lisp_const, ao_lisp_top));
389 for (a = ao_lisp_atoms; a; a = ao_lisp_poly_atom(a->next)) {
390 char *n = a->name, c;
391 fprintf(out, "#define _ao_lisp_atom_");
394 fprintf(out, "%c", c);
396 fprintf(out, "%02x", c);
398 fprintf(out, " 0x%04x\n", ao_lisp_atom_poly(a));
400 fprintf(out, "#ifdef AO_LISP_CONST_BITS\n");
401 fprintf(out, "const uint8_t ao_lisp_const[AO_LISP_POOL_CONST] __attribute((aligned(4))) = {");
402 for (o = 0; o < ao_lisp_top; o++) {
405 fprintf(out, "\n\t");
408 c = ao_lisp_const[o];
410 in_atom = is_atom(o);
412 fprintf(out, " '%c',", c);
415 fprintf(out, "0x%02x,", c);
418 fprintf(out, "\n};\n");
419 fprintf(out, "#endif /* AO_LISP_CONST_BITS */\n");