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1/*
2 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
3 *
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of the
8 * License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
18 * USA
19 */
20%{
21#include <stdio.h>
22
23#include "dtc.h"
24#include "srcpos.h"
25
26extern int yylex(void);
27extern void yyerror(char const *s);
28#define ERROR(loc, ...) \
29 do { \
30 srcpos_error((loc), "Error", __VA_ARGS__); \
31 treesource_error = true; \
32 } while (0)
33
34extern struct boot_info *the_boot_info;
35extern bool treesource_error;
36%}
37
38%union {
39 char *propnodename;
40 char *labelref;
41 uint8_t byte;
42 struct data data;
43
44 struct {
45 struct data data;
46 int bits;
47 } array;
48
49 struct property *prop;
50 struct property *proplist;
51 struct node *node;
52 struct node *nodelist;
53 struct reserve_info *re;
54 uint64_t integer;
55}
56
57%token DT_V1
58%token DT_MEMRESERVE
59%token DT_LSHIFT DT_RSHIFT DT_LE DT_GE DT_EQ DT_NE DT_AND DT_OR
60%token DT_BITS
61%token DT_DEL_PROP
62%token DT_DEL_NODE
63%token <propnodename> DT_PROPNODENAME
64%token <integer> DT_LITERAL
65%token <integer> DT_CHAR_LITERAL
66%token <byte> DT_BYTE
67%token <data> DT_STRING
68%token <labelref> DT_LABEL
69%token <labelref> DT_REF
70%token DT_INCBIN
71
72%type <data> propdata
73%type <data> propdataprefix
74%type <re> memreserve
75%type <re> memreserves
76%type <array> arrayprefix
77%type <data> bytestring
78%type <prop> propdef
79%type <proplist> proplist
80
81%type <node> devicetree
82%type <node> nodedef
83%type <node> subnode
84%type <nodelist> subnodes
85
86%type <integer> integer_prim
87%type <integer> integer_unary
88%type <integer> integer_mul
89%type <integer> integer_add
90%type <integer> integer_shift
91%type <integer> integer_rela
92%type <integer> integer_eq
93%type <integer> integer_bitand
94%type <integer> integer_bitxor
95%type <integer> integer_bitor
96%type <integer> integer_and
97%type <integer> integer_or
98%type <integer> integer_trinary
99%type <integer> integer_expr
100
101%%
102
103sourcefile:
104 DT_V1 ';' memreserves devicetree
105 {
106 the_boot_info = build_boot_info($3, $4,
107 guess_boot_cpuid($4));
108 }
109 ;
110
111memreserves:
112 /* empty */
113 {
114 $$ = NULL;
115 }
116 | memreserve memreserves
117 {
118 $$ = chain_reserve_entry($1, $2);
119 }
120 ;
121
122memreserve:
123 DT_MEMRESERVE integer_prim integer_prim ';'
124 {
125 $$ = build_reserve_entry($2, $3);
126 }
127 | DT_LABEL memreserve
128 {
129 add_label(&$2->labels, $1);
130 $$ = $2;
131 }
132 ;
133
134devicetree:
135 '/' nodedef
136 {
137 $$ = name_node($2, "");
138 }
139 | devicetree '/' nodedef
140 {
141 $$ = merge_nodes($1, $3);
142 }
143
144 | devicetree DT_LABEL DT_REF nodedef
145 {
146 struct node *target = get_node_by_ref($1, $3);
147
148 add_label(&target->labels, $2);
149 if (target)
150 merge_nodes(target, $4);
151 else
152 ERROR(&@3, "Label or path %s not found", $3);
153 $$ = $1;
154 }
155 | devicetree DT_REF nodedef
156 {
157 struct node *target = get_node_by_ref($1, $2);
158
159 if (target)
160 merge_nodes(target, $3);
161 else
162 ERROR(&@2, "Label or path %s not found", $2);
163 $$ = $1;
164 }
165 | devicetree DT_DEL_NODE DT_REF ';'
166 {
167 struct node *target = get_node_by_ref($1, $3);
168
169 if (target)
170 delete_node(target);
171 else
172 ERROR(&@3, "Label or path %s not found", $3);
173
174
175 $$ = $1;
176 }
177 ;
178
179nodedef:
180 '{' proplist subnodes '}' ';'
181 {
182 $$ = build_node($2, $3);
183 }
184 ;
185
186proplist:
187 /* empty */
188 {
189 $$ = NULL;
190 }
191 | proplist propdef
192 {
193 $$ = chain_property($2, $1);
194 }
195 ;
196
197propdef:
198 DT_PROPNODENAME '=' propdata ';'
199 {
200 $$ = build_property($1, $3);
201 }
202 | DT_PROPNODENAME ';'
203 {
204 $$ = build_property($1, empty_data);
205 }
206 | DT_DEL_PROP DT_PROPNODENAME ';'
207 {
208 $$ = build_property_delete($2);
209 }
210 | DT_LABEL propdef
211 {
212 add_label(&$2->labels, $1);
213 $$ = $2;
214 }
215 ;
216
217propdata:
218 propdataprefix DT_STRING
219 {
220 $$ = data_merge($1, $2);
221 }
222 | propdataprefix arrayprefix '>'
223 {
224 $$ = data_merge($1, $2.data);
225 }
226 | propdataprefix '[' bytestring ']'
227 {
228 $$ = data_merge($1, $3);
229 }
230 | propdataprefix DT_REF
231 {
232 $$ = data_add_marker($1, REF_PATH, $2);
233 }
234 | propdataprefix DT_INCBIN '(' DT_STRING ',' integer_prim ',' integer_prim ')'
235 {
236 FILE *f = srcfile_relative_open($4.val, NULL);
237 struct data d;
238
239 if ($6 != 0)
240 if (fseek(f, $6, SEEK_SET) != 0)
241 die("Couldn't seek to offset %llu in \"%s\": %s",
242 (unsigned long long)$6, $4.val,
243 strerror(errno));
244
245 d = data_copy_file(f, $8);
246
247 $$ = data_merge($1, d);
248 fclose(f);
249 }
250 | propdataprefix DT_INCBIN '(' DT_STRING ')'
251 {
252 FILE *f = srcfile_relative_open($4.val, NULL);
253 struct data d = empty_data;
254
255 d = data_copy_file(f, -1);
256
257 $$ = data_merge($1, d);
258 fclose(f);
259 }
260 | propdata DT_LABEL
261 {
262 $$ = data_add_marker($1, LABEL, $2);
263 }
264 ;
265
266propdataprefix:
267 /* empty */
268 {
269 $$ = empty_data;
270 }
271 | propdata ','
272 {
273 $$ = $1;
274 }
275 | propdataprefix DT_LABEL
276 {
277 $$ = data_add_marker($1, LABEL, $2);
278 }
279 ;
280
281arrayprefix:
282 DT_BITS DT_LITERAL '<'
283 {
284 unsigned long long bits;
285
286 bits = $2;
287
288 if ((bits != 8) && (bits != 16) &&
289 (bits != 32) && (bits != 64)) {
290 ERROR(&@2, "Array elements must be"
291 " 8, 16, 32 or 64-bits");
292 bits = 32;
293 }
294
295 $$.data = empty_data;
296 $$.bits = bits;
297 }
298 | '<'
299 {
300 $$.data = empty_data;
301 $$.bits = 32;
302 }
303 | arrayprefix integer_prim
304 {
305 if ($1.bits < 64) {
306 uint64_t mask = (1ULL << $1.bits) - 1;
307 /*
308 * Bits above mask must either be all zero
309 * (positive within range of mask) or all one
310 * (negative and sign-extended). The second
311 * condition is true if when we set all bits
312 * within the mask to one (i.e. | in the
313 * mask), all bits are one.
314 */
315 if (($2 > mask) && (($2 | mask) != -1ULL))
316 ERROR(&@2, "Value out of range for"
317 " %d-bit array element", $1.bits);
318 }
319
320 $$.data = data_append_integer($1.data, $2, $1.bits);
321 }
322 | arrayprefix DT_REF
323 {
324 uint64_t val = ~0ULL >> (64 - $1.bits);
325
326 if ($1.bits == 32)
327 $1.data = data_add_marker($1.data,
328 REF_PHANDLE,
329 $2);
330 else
331 ERROR(&@2, "References are only allowed in "
332 "arrays with 32-bit elements.");
333
334 $$.data = data_append_integer($1.data, val, $1.bits);
335 }
336 | arrayprefix DT_LABEL
337 {
338 $$.data = data_add_marker($1.data, LABEL, $2);
339 }
340 ;
341
342integer_prim:
343 DT_LITERAL
344 | DT_CHAR_LITERAL
345 | '(' integer_expr ')'
346 {
347 $$ = $2;
348 }
349 ;
350
351integer_expr:
352 integer_trinary
353 ;
354
355integer_trinary:
356 integer_or
357 | integer_or '?' integer_expr ':' integer_trinary { $$ = $1 ? $3 : $5; }
358 ;
359
360integer_or:
361 integer_and
362 | integer_or DT_OR integer_and { $$ = $1 || $3; }
363 ;
364
365integer_and:
366 integer_bitor
367 | integer_and DT_AND integer_bitor { $$ = $1 && $3; }
368 ;
369
370integer_bitor:
371 integer_bitxor
372 | integer_bitor '|' integer_bitxor { $$ = $1 | $3; }
373 ;
374
375integer_bitxor:
376 integer_bitand
377 | integer_bitxor '^' integer_bitand { $$ = $1 ^ $3; }
378 ;
379
380integer_bitand:
381 integer_eq
382 | integer_bitand '&' integer_eq { $$ = $1 & $3; }
383 ;
384
385integer_eq:
386 integer_rela
387 | integer_eq DT_EQ integer_rela { $$ = $1 == $3; }
388 | integer_eq DT_NE integer_rela { $$ = $1 != $3; }
389 ;
390
391integer_rela:
392 integer_shift
393 | integer_rela '<' integer_shift { $$ = $1 < $3; }
394 | integer_rela '>' integer_shift { $$ = $1 > $3; }
395 | integer_rela DT_LE integer_shift { $$ = $1 <= $3; }
396 | integer_rela DT_GE integer_shift { $$ = $1 >= $3; }
397 ;
398
399integer_shift:
400 integer_shift DT_LSHIFT integer_add { $$ = $1 << $3; }
401 | integer_shift DT_RSHIFT integer_add { $$ = $1 >> $3; }
402 | integer_add
403 ;
404
405integer_add:
406 integer_add '+' integer_mul { $$ = $1 + $3; }
407 | integer_add '-' integer_mul { $$ = $1 - $3; }
408 | integer_mul
409 ;
410
411integer_mul:
412 integer_mul '*' integer_unary { $$ = $1 * $3; }
413 | integer_mul '/' integer_unary
414 {
415 if ($3 != 0) {
416 $$ = $1 / $3;
417 } else {
418 ERROR(&@$, "Division by zero");
419 $$ = 0;
420 }
421 }
422 | integer_mul '%' integer_unary
423 {
424 if ($3 != 0) {
425 $$ = $1 % $3;
426 } else {
427 ERROR(&@$, "Division by zero");
428 $$ = 0;
429 }
430 }
431 | integer_unary
432 ;
433
434integer_unary:
435 integer_prim
436 | '-' integer_unary { $$ = -$2; }
437 | '~' integer_unary { $$ = ~$2; }
438 | '!' integer_unary { $$ = !$2; }
439 ;
440
441bytestring:
442 /* empty */
443 {
444 $$ = empty_data;
445 }
446 | bytestring DT_BYTE
447 {
448 $$ = data_append_byte($1, $2);
449 }
450 | bytestring DT_LABEL
451 {
452 $$ = data_add_marker($1, LABEL, $2);
453 }
454 ;
455
456subnodes:
457 /* empty */
458 {
459 $$ = NULL;
460 }
461 | subnode subnodes
462 {
463 $$ = chain_node($1, $2);
464 }
465 | subnode propdef
466 {
467 ERROR(&@2, "Properties must precede subnodes");
468 YYERROR;
469 }
470 ;
471
472subnode:
473 DT_PROPNODENAME nodedef
474 {
475 $$ = name_node($2, $1);
476 }
477 | DT_DEL_NODE DT_PROPNODENAME ';'
478 {
479 $$ = name_node(build_node_delete(), $2);
480 }
481 | DT_LABEL subnode
482 {
483 add_label(&$2->labels, $1);
484 $$ = $2;
485 }
486 ;
487
488%%
489
490void yyerror(char const *s)
491{
492 ERROR(&yylloc, "%s", s);
493}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
4 */
5%{
6#include <stdio.h>
7#include <inttypes.h>
8
9#include "dtc.h"
10#include "srcpos.h"
11
12extern int yylex(void);
13extern void yyerror(char const *s);
14#define ERROR(loc, ...) \
15 do { \
16 srcpos_error((loc), "Error", __VA_ARGS__); \
17 treesource_error = true; \
18 } while (0)
19
20extern struct dt_info *parser_output;
21extern bool treesource_error;
22%}
23
24%union {
25 char *propnodename;
26 char *labelref;
27 uint8_t byte;
28 struct data data;
29
30 struct {
31 struct data data;
32 int bits;
33 } array;
34
35 struct property *prop;
36 struct property *proplist;
37 struct node *node;
38 struct node *nodelist;
39 struct reserve_info *re;
40 uint64_t integer;
41 unsigned int flags;
42}
43
44%token DT_V1
45%token DT_PLUGIN
46%token DT_MEMRESERVE
47%token DT_LSHIFT DT_RSHIFT DT_LE DT_GE DT_EQ DT_NE DT_AND DT_OR
48%token DT_BITS
49%token DT_DEL_PROP
50%token DT_DEL_NODE
51%token DT_OMIT_NO_REF
52%token <propnodename> DT_PROPNODENAME
53%token <integer> DT_LITERAL
54%token <integer> DT_CHAR_LITERAL
55%token <byte> DT_BYTE
56%token <data> DT_STRING
57%token <labelref> DT_LABEL
58%token <labelref> DT_LABEL_REF
59%token <labelref> DT_PATH_REF
60%token DT_INCBIN
61
62%type <data> propdata
63%type <data> propdataprefix
64%type <flags> header
65%type <flags> headers
66%type <re> memreserve
67%type <re> memreserves
68%type <array> arrayprefix
69%type <data> bytestring
70%type <prop> propdef
71%type <proplist> proplist
72%type <labelref> dt_ref
73
74%type <node> devicetree
75%type <node> nodedef
76%type <node> subnode
77%type <nodelist> subnodes
78
79%type <integer> integer_prim
80%type <integer> integer_unary
81%type <integer> integer_mul
82%type <integer> integer_add
83%type <integer> integer_shift
84%type <integer> integer_rela
85%type <integer> integer_eq
86%type <integer> integer_bitand
87%type <integer> integer_bitxor
88%type <integer> integer_bitor
89%type <integer> integer_and
90%type <integer> integer_or
91%type <integer> integer_trinary
92%type <integer> integer_expr
93
94%%
95
96sourcefile:
97 headers memreserves devicetree
98 {
99 parser_output = build_dt_info($1, $2, $3,
100 guess_boot_cpuid($3));
101 }
102 ;
103
104header:
105 DT_V1 ';'
106 {
107 $$ = DTSF_V1;
108 }
109 | DT_V1 ';' DT_PLUGIN ';'
110 {
111 $$ = DTSF_V1 | DTSF_PLUGIN;
112 }
113 ;
114
115headers:
116 header
117 | header headers
118 {
119 if ($2 != $1)
120 ERROR(&@2, "Header flags don't match earlier ones");
121 $$ = $1;
122 }
123 ;
124
125memreserves:
126 /* empty */
127 {
128 $$ = NULL;
129 }
130 | memreserve memreserves
131 {
132 $$ = chain_reserve_entry($1, $2);
133 }
134 ;
135
136memreserve:
137 DT_MEMRESERVE integer_prim integer_prim ';'
138 {
139 $$ = build_reserve_entry($2, $3);
140 }
141 | DT_LABEL memreserve
142 {
143 add_label(&$2->labels, $1);
144 $$ = $2;
145 }
146 ;
147
148dt_ref: DT_LABEL_REF | DT_PATH_REF;
149
150devicetree:
151 '/' nodedef
152 {
153 $$ = name_node($2, "");
154 }
155 | devicetree '/' nodedef
156 {
157 $$ = merge_nodes($1, $3);
158 }
159 | dt_ref nodedef
160 {
161 /*
162 * We rely on the rule being always:
163 * versioninfo plugindecl memreserves devicetree
164 * so $-1 is what we want (plugindecl)
165 */
166 if (!($<flags>-1 & DTSF_PLUGIN))
167 ERROR(&@2, "Label or path %s not found", $1);
168 $$ = add_orphan_node(
169 name_node(build_node(NULL, NULL, NULL),
170 ""),
171 $2, $1);
172 }
173 | devicetree DT_LABEL dt_ref nodedef
174 {
175 struct node *target = get_node_by_ref($1, $3);
176
177 if (target) {
178 add_label(&target->labels, $2);
179 merge_nodes(target, $4);
180 } else
181 ERROR(&@3, "Label or path %s not found", $3);
182 $$ = $1;
183 }
184 | devicetree DT_PATH_REF nodedef
185 {
186 /*
187 * We rely on the rule being always:
188 * versioninfo plugindecl memreserves devicetree
189 * so $-1 is what we want (plugindecl)
190 */
191 if ($<flags>-1 & DTSF_PLUGIN) {
192 add_orphan_node($1, $3, $2);
193 } else {
194 struct node *target = get_node_by_ref($1, $2);
195
196 if (target)
197 merge_nodes(target, $3);
198 else
199 ERROR(&@2, "Label or path %s not found", $2);
200 }
201 $$ = $1;
202 }
203 | devicetree DT_LABEL_REF nodedef
204 {
205 struct node *target = get_node_by_ref($1, $2);
206
207 if (target) {
208 merge_nodes(target, $3);
209 } else {
210 /*
211 * We rely on the rule being always:
212 * versioninfo plugindecl memreserves devicetree
213 * so $-1 is what we want (plugindecl)
214 */
215 if ($<flags>-1 & DTSF_PLUGIN)
216 add_orphan_node($1, $3, $2);
217 else
218 ERROR(&@2, "Label or path %s not found", $2);
219 }
220 $$ = $1;
221 }
222 | devicetree DT_DEL_NODE dt_ref ';'
223 {
224 struct node *target = get_node_by_ref($1, $3);
225
226 if (target)
227 delete_node(target);
228 else
229 ERROR(&@3, "Label or path %s not found", $3);
230
231
232 $$ = $1;
233 }
234 | devicetree DT_OMIT_NO_REF dt_ref ';'
235 {
236 struct node *target = get_node_by_ref($1, $3);
237
238 if (target)
239 omit_node_if_unused(target);
240 else
241 ERROR(&@3, "Label or path %s not found", $3);
242
243
244 $$ = $1;
245 }
246 ;
247
248nodedef:
249 '{' proplist subnodes '}' ';'
250 {
251 $$ = build_node($2, $3, &@$);
252 }
253 ;
254
255proplist:
256 /* empty */
257 {
258 $$ = NULL;
259 }
260 | proplist propdef
261 {
262 $$ = chain_property($2, $1);
263 }
264 ;
265
266propdef:
267 DT_PROPNODENAME '=' propdata ';'
268 {
269 $$ = build_property($1, $3, &@$);
270 }
271 | DT_PROPNODENAME ';'
272 {
273 $$ = build_property($1, empty_data, &@$);
274 }
275 | DT_DEL_PROP DT_PROPNODENAME ';'
276 {
277 $$ = build_property_delete($2);
278 }
279 | DT_LABEL propdef
280 {
281 add_label(&$2->labels, $1);
282 $$ = $2;
283 }
284 ;
285
286propdata:
287 propdataprefix DT_STRING
288 {
289 $$ = data_merge($1, $2);
290 }
291 | propdataprefix arrayprefix '>'
292 {
293 $$ = data_merge($1, $2.data);
294 }
295 | propdataprefix '[' bytestring ']'
296 {
297 $$ = data_merge($1, $3);
298 }
299 | propdataprefix dt_ref
300 {
301 $1 = data_add_marker($1, TYPE_STRING, $2);
302 $$ = data_add_marker($1, REF_PATH, $2);
303 }
304 | propdataprefix DT_INCBIN '(' DT_STRING ',' integer_prim ',' integer_prim ')'
305 {
306 FILE *f = srcfile_relative_open($4.val, NULL);
307 struct data d;
308
309 if ($6 != 0)
310 if (fseek(f, $6, SEEK_SET) != 0)
311 die("Couldn't seek to offset %llu in \"%s\": %s",
312 (unsigned long long)$6, $4.val,
313 strerror(errno));
314
315 d = data_copy_file(f, $8);
316
317 $$ = data_merge($1, d);
318 fclose(f);
319 }
320 | propdataprefix DT_INCBIN '(' DT_STRING ')'
321 {
322 FILE *f = srcfile_relative_open($4.val, NULL);
323 struct data d = empty_data;
324
325 d = data_copy_file(f, -1);
326
327 $$ = data_merge($1, d);
328 fclose(f);
329 }
330 | propdata DT_LABEL
331 {
332 $$ = data_add_marker($1, LABEL, $2);
333 }
334 ;
335
336propdataprefix:
337 /* empty */
338 {
339 $$ = empty_data;
340 }
341 | propdata ','
342 {
343 $$ = $1;
344 }
345 | propdataprefix DT_LABEL
346 {
347 $$ = data_add_marker($1, LABEL, $2);
348 }
349 ;
350
351arrayprefix:
352 DT_BITS DT_LITERAL '<'
353 {
354 unsigned long long bits;
355 enum markertype type = TYPE_UINT32;
356
357 bits = $2;
358
359 switch (bits) {
360 case 8: type = TYPE_UINT8; break;
361 case 16: type = TYPE_UINT16; break;
362 case 32: type = TYPE_UINT32; break;
363 case 64: type = TYPE_UINT64; break;
364 default:
365 ERROR(&@2, "Array elements must be"
366 " 8, 16, 32 or 64-bits");
367 bits = 32;
368 }
369
370 $$.data = data_add_marker(empty_data, type, NULL);
371 $$.bits = bits;
372 }
373 | '<'
374 {
375 $$.data = data_add_marker(empty_data, TYPE_UINT32, NULL);
376 $$.bits = 32;
377 }
378 | arrayprefix integer_prim
379 {
380 if ($1.bits < 64) {
381 uint64_t mask = (1ULL << $1.bits) - 1;
382 /*
383 * Bits above mask must either be all zero
384 * (positive within range of mask) or all one
385 * (negative and sign-extended). The second
386 * condition is true if when we set all bits
387 * within the mask to one (i.e. | in the
388 * mask), all bits are one.
389 */
390 if (($2 > mask) && (($2 | mask) != -1ULL))
391 ERROR(&@2, "Value out of range for"
392 " %d-bit array element", $1.bits);
393 }
394
395 $$.data = data_append_integer($1.data, $2, $1.bits);
396 }
397 | arrayprefix dt_ref
398 {
399 uint64_t val = ~0ULL >> (64 - $1.bits);
400
401 if ($1.bits == 32)
402 $1.data = data_add_marker($1.data,
403 REF_PHANDLE,
404 $2);
405 else
406 ERROR(&@2, "References are only allowed in "
407 "arrays with 32-bit elements.");
408
409 $$.data = data_append_integer($1.data, val, $1.bits);
410 }
411 | arrayprefix DT_LABEL
412 {
413 $$.data = data_add_marker($1.data, LABEL, $2);
414 }
415 ;
416
417integer_prim:
418 DT_LITERAL
419 | DT_CHAR_LITERAL
420 | '(' integer_expr ')'
421 {
422 $$ = $2;
423 }
424 ;
425
426integer_expr:
427 integer_trinary
428 ;
429
430integer_trinary:
431 integer_or
432 | integer_or '?' integer_expr ':' integer_trinary { $$ = $1 ? $3 : $5; }
433 ;
434
435integer_or:
436 integer_and
437 | integer_or DT_OR integer_and { $$ = $1 || $3; }
438 ;
439
440integer_and:
441 integer_bitor
442 | integer_and DT_AND integer_bitor { $$ = $1 && $3; }
443 ;
444
445integer_bitor:
446 integer_bitxor
447 | integer_bitor '|' integer_bitxor { $$ = $1 | $3; }
448 ;
449
450integer_bitxor:
451 integer_bitand
452 | integer_bitxor '^' integer_bitand { $$ = $1 ^ $3; }
453 ;
454
455integer_bitand:
456 integer_eq
457 | integer_bitand '&' integer_eq { $$ = $1 & $3; }
458 ;
459
460integer_eq:
461 integer_rela
462 | integer_eq DT_EQ integer_rela { $$ = $1 == $3; }
463 | integer_eq DT_NE integer_rela { $$ = $1 != $3; }
464 ;
465
466integer_rela:
467 integer_shift
468 | integer_rela '<' integer_shift { $$ = $1 < $3; }
469 | integer_rela '>' integer_shift { $$ = $1 > $3; }
470 | integer_rela DT_LE integer_shift { $$ = $1 <= $3; }
471 | integer_rela DT_GE integer_shift { $$ = $1 >= $3; }
472 ;
473
474integer_shift:
475 integer_shift DT_LSHIFT integer_add { $$ = $1 << $3; }
476 | integer_shift DT_RSHIFT integer_add { $$ = $1 >> $3; }
477 | integer_add
478 ;
479
480integer_add:
481 integer_add '+' integer_mul { $$ = $1 + $3; }
482 | integer_add '-' integer_mul { $$ = $1 - $3; }
483 | integer_mul
484 ;
485
486integer_mul:
487 integer_mul '*' integer_unary { $$ = $1 * $3; }
488 | integer_mul '/' integer_unary
489 {
490 if ($3 != 0) {
491 $$ = $1 / $3;
492 } else {
493 ERROR(&@$, "Division by zero");
494 $$ = 0;
495 }
496 }
497 | integer_mul '%' integer_unary
498 {
499 if ($3 != 0) {
500 $$ = $1 % $3;
501 } else {
502 ERROR(&@$, "Division by zero");
503 $$ = 0;
504 }
505 }
506 | integer_unary
507 ;
508
509integer_unary:
510 integer_prim
511 | '-' integer_unary { $$ = -$2; }
512 | '~' integer_unary { $$ = ~$2; }
513 | '!' integer_unary { $$ = !$2; }
514 ;
515
516bytestring:
517 /* empty */
518 {
519 $$ = data_add_marker(empty_data, TYPE_UINT8, NULL);
520 }
521 | bytestring DT_BYTE
522 {
523 $$ = data_append_byte($1, $2);
524 }
525 | bytestring DT_LABEL
526 {
527 $$ = data_add_marker($1, LABEL, $2);
528 }
529 ;
530
531subnodes:
532 /* empty */
533 {
534 $$ = NULL;
535 }
536 | subnode subnodes
537 {
538 $$ = chain_node($1, $2);
539 }
540 | subnode propdef
541 {
542 ERROR(&@2, "Properties must precede subnodes");
543 YYERROR;
544 }
545 ;
546
547subnode:
548 DT_PROPNODENAME nodedef
549 {
550 $$ = name_node($2, $1);
551 }
552 | DT_DEL_NODE DT_PROPNODENAME ';'
553 {
554 $$ = name_node(build_node_delete(&@$), $2);
555 }
556 | DT_OMIT_NO_REF subnode
557 {
558 $$ = omit_node_if_unused($2);
559 }
560 | DT_LABEL subnode
561 {
562 add_label(&$2->labels, $1);
563 $$ = $2;
564 }
565 ;
566
567%%
568
569void yyerror(char const *s)
570{
571 ERROR(&yylloc, "%s", s);
572}