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);
119 ao_is_macro(ao_poly p)
121 struct ao_lisp_builtin *builtin;
122 struct ao_lisp_lambda *lambda;
124 // printf ("macro scanning "); ao_lisp_poly_print(p); printf("\n");
125 switch (ao_lisp_poly_type(p)) {
127 return ao_is_macro(ao_lisp_atom_get(p));
128 case AO_LISP_BUILTIN:
129 builtin = ao_lisp_poly_builtin(p);
130 if ((builtin->args & AO_LISP_FUNC_MASK) == AO_LISP_FUNC_MACRO)
134 lambda = ao_lisp_poly_lambda(p);
135 if (lambda->args == AO_LISP_FUNC_MACRO)
144 ao_has_macro(ao_poly p)
146 struct ao_lisp_cons *cons;
147 struct ao_lisp_lambda *lambda;
150 if (p == AO_LISP_NIL)
153 switch (ao_lisp_poly_type(p)) {
155 lambda = ao_lisp_poly_lambda(p);
156 return ao_has_macro(lambda->code);
158 cons = ao_lisp_poly_cons(p);
159 if (ao_is_macro(cons->car))
162 cons = ao_lisp_poly_cons(cons->cdr);
164 m = ao_has_macro(cons->car);
167 cons = ao_lisp_poly_cons(cons->cdr);
177 ao_lisp_read_eval_abort(void)
179 ao_poly in, out = AO_LISP_NIL;
182 if (in == _ao_lisp_atom_eof)
184 out = ao_lisp_eval(in);
185 if (ao_lisp_exception)
187 ao_lisp_poly_print(out);
202 static const struct option options[] = {
203 { .name = "out", .has_arg = 1, .val = 'o' },
207 static void usage(char *program)
209 fprintf(stderr, "usage: %s [--out=<output>] [input]\n", program);
214 main(int argc, char **argv)
218 struct ao_lisp_atom *a;
219 struct ao_lisp_builtin *b;
227 while ((c = getopt_long(argc, argv, "o:", options, NULL)) != -1) {
238 for (f = 0; f < (int) N_FUNC; f++) {
239 b = ao_lisp_make_builtin(funcs[f].func, funcs[f].args);
240 a = ao_lisp_atom_intern(funcs[f].name);
241 ao_lisp_atom_set(ao_lisp_atom_poly(a),
242 ao_lisp_builtin_poly(b));
245 /* boolean constants */
246 ao_lisp_atom_set(ao_lisp_atom_poly(ao_lisp_atom_intern("nil")),
248 a = ao_lisp_atom_intern("t");
249 ao_lisp_atom_set(ao_lisp_atom_poly(a),
250 ao_lisp_atom_poly(a));
252 /* end of file value */
253 a = ao_lisp_atom_intern("eof");
254 ao_lisp_atom_set(ao_lisp_atom_poly(a),
255 ao_lisp_atom_poly(a));
258 in = fopen(argv[optind], "r");
260 perror(argv[optind]);
264 if (!ao_lisp_read_eval_abort()) {
265 fprintf(stderr, "eval failed\n");
269 /* Reduce to referenced values */
272 for (f = 0; f < ao_lisp_frame_global->num; f++) {
273 val = ao_has_macro(ao_lisp_frame_global->vals[f].val);
274 if (val != AO_LISP_NIL) {
275 printf("error: function %s contains unresolved macro: ",
276 ao_lisp_poly_atom(ao_lisp_frame_global->vals[f].atom)->name);
277 ao_lisp_poly_print(val);
278 printf(stderr, "\n");
284 out = fopen(out_name, "w");
291 fprintf(out, "/* Generated file, do not edit */\n\n");
293 fprintf(out, "#define AO_LISP_POOL_CONST %d\n", ao_lisp_top);
294 fprintf(out, "extern const uint8_t ao_lisp_const[AO_LISP_POOL_CONST] __attribute__((aligned(4)));\n");
295 fprintf(out, "#define ao_builtin_atoms 0x%04x\n", ao_lisp_atom_poly(ao_lisp_atoms));
296 fprintf(out, "#define ao_builtin_frame 0x%04x\n", ao_lisp_frame_poly(ao_lisp_frame_global));
297 fprintf(out, "#define ao_lisp_const_checksum ((uint16_t) 0x%04x)\n", ao_fec_crc(ao_lisp_const, ao_lisp_top));
300 for (a = ao_lisp_atoms; a; a = ao_lisp_poly_atom(a->next)) {
301 char *n = a->name, c;
302 fprintf(out, "#define _ao_lisp_atom_");
305 fprintf(out, "%c", c);
307 fprintf(out, "%02x", c);
309 fprintf(out, " 0x%04x\n", ao_lisp_atom_poly(a));
311 fprintf(out, "#ifdef AO_LISP_CONST_BITS\n");
312 fprintf(out, "const uint8_t ao_lisp_const[] = {");
313 for (o = 0; o < ao_lisp_top; o++) {
316 fprintf(out, "\n\t");
319 c = ao_lisp_const[o];
321 in_atom = is_atom(o);
323 fprintf(out, " '%c',", c);
326 fprintf(out, "0x%02x,", c);
329 fprintf(out, "\n};\n");
330 fprintf(out, "#endif /* AO_LISP_CONST_BITS */\n");