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Merge branch 'nouveau-import'
[mesa.git] / src / mesa / shader / slang / slang_compile.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 6.5.2
4 *
5 * Copyright (C) 2005-2006 Brian Paul All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 /**
26 * \file slang_compile.c
27 * slang front-end compiler
28 * \author Michal Krol
29 */
30
31 #include "imports.h"
32 #include "grammar_mesa.h"
33 #include "slang_compile.h"
34 #include "slang_preprocess.h"
35 #include "slang_storage.h"
36
37 /*
38 * This is a straightforward implementation of the slang front-end
39 * compiler. Lots of error-checking functionality is missing but
40 * every well-formed shader source should compile successfully and
41 * execute as expected. However, some semantically ill-formed shaders
42 * may be accepted resulting in undefined behaviour.
43 */
44
45
46
47 /**
48 * Allocate storage for a variable of 'size' bytes from given pool.
49 * Return the allocated address for the variable.
50 */
51 static GLuint
52 slang_var_pool_alloc(slang_var_pool * pool, unsigned int size)
53 {
54 const GLuint addr = pool->next_addr;
55 pool->next_addr += size;
56 return addr;
57 }
58
59 /*
60 * slang_code_unit
61 */
62
63 GLvoid
64 _slang_code_unit_ctr(slang_code_unit * self,
65 struct slang_code_object_ * object)
66 {
67 _slang_variable_scope_ctr(&self->vars);
68 _slang_function_scope_ctr(&self->funs);
69 _slang_struct_scope_ctr(&self->structs);
70 self->object = object;
71 }
72
73 GLvoid
74 _slang_code_unit_dtr(slang_code_unit * self)
75 {
76 slang_variable_scope_destruct(&self->vars);
77 slang_function_scope_destruct(&self->funs);
78 slang_struct_scope_destruct(&self->structs);
79 }
80
81 /*
82 * slang_code_object
83 */
84
85 GLvoid
86 _slang_code_object_ctr(slang_code_object * self)
87 {
88 GLuint i;
89
90 for (i = 0; i < SLANG_BUILTIN_TOTAL; i++)
91 _slang_code_unit_ctr(&self->builtin[i], self);
92 _slang_code_unit_ctr(&self->unit, self);
93 _slang_assembly_file_ctr(&self->assembly);
94 slang_machine_ctr(&self->machine);
95 self->varpool.next_addr = 0;
96 slang_atom_pool_construct(&self->atompool);
97 slang_export_data_table_ctr(&self->expdata);
98 self->expdata.atoms = &self->atompool;
99 slang_export_code_table_ctr(&self->expcode);
100 self->expcode.atoms = &self->atompool;
101 }
102
103 GLvoid
104 _slang_code_object_dtr(slang_code_object * self)
105 {
106 GLuint i;
107
108 for (i = 0; i < SLANG_BUILTIN_TOTAL; i++)
109 _slang_code_unit_dtr(&self->builtin[i]);
110 _slang_code_unit_dtr(&self->unit);
111 slang_assembly_file_destruct(&self->assembly);
112 slang_machine_dtr(&self->machine);
113 slang_atom_pool_destruct(&self->atompool);
114 slang_export_data_table_dtr(&self->expdata);
115 slang_export_code_table_ctr(&self->expcode);
116 }
117
118 /* slang_info_log */
119
120 static char *out_of_memory = "Error: Out of memory.\n";
121
122 void
123 slang_info_log_construct(slang_info_log * log)
124 {
125 log->text = NULL;
126 log->dont_free_text = 0;
127 }
128
129 void
130 slang_info_log_destruct(slang_info_log * log)
131 {
132 if (!log->dont_free_text)
133 slang_alloc_free(log->text);
134 }
135
136 static int
137 slang_info_log_message(slang_info_log * log, const char *prefix,
138 const char *msg)
139 {
140 GLuint size;
141
142 if (log->dont_free_text)
143 return 0;
144 size = slang_string_length(msg) + 2;
145 if (prefix != NULL)
146 size += slang_string_length(prefix) + 2;
147 if (log->text != NULL) {
148 GLuint old_len = slang_string_length(log->text);
149 log->text = (char *)
150 slang_alloc_realloc(log->text, old_len + 1, old_len + size);
151 }
152 else {
153 log->text = (char *) (slang_alloc_malloc(size));
154 if (log->text != NULL)
155 log->text[0] = '\0';
156 }
157 if (log->text == NULL)
158 return 0;
159 if (prefix != NULL) {
160 slang_string_concat(log->text, prefix);
161 slang_string_concat(log->text, ": ");
162 }
163 slang_string_concat(log->text, msg);
164 slang_string_concat(log->text, "\n");
165 return 1;
166 }
167
168 int
169 slang_info_log_print(slang_info_log * log, const char *msg, ...)
170 {
171 va_list va;
172 char buf[1024];
173
174 va_start(va, msg);
175 _mesa_vsprintf(buf, msg, va);
176 va_end(va);
177 return slang_info_log_message(log, NULL, buf);
178 }
179
180 int
181 slang_info_log_error(slang_info_log * log, const char *msg, ...)
182 {
183 va_list va;
184 char buf[1024];
185
186 va_start(va, msg);
187 _mesa_vsprintf(buf, msg, va);
188 va_end(va);
189 if (slang_info_log_message(log, "Error", buf))
190 return 1;
191 slang_info_log_memory(log);
192 return 0;
193 }
194
195 int
196 slang_info_log_warning(slang_info_log * log, const char *msg, ...)
197 {
198 va_list va;
199 char buf[1024];
200
201 va_start(va, msg);
202 _mesa_vsprintf(buf, msg, va);
203 va_end(va);
204 if (slang_info_log_message(log, "Warning", buf))
205 return 1;
206 slang_info_log_memory(log);
207 return 0;
208 }
209
210 void
211 slang_info_log_memory(slang_info_log * log)
212 {
213 if (!slang_info_log_message(log, "Error", "Out of memory.")) {
214 log->dont_free_text = 1;
215 log->text = out_of_memory;
216 }
217 }
218
219 /* slang_parse_ctx */
220
221 typedef struct slang_parse_ctx_
222 {
223 const byte *I;
224 slang_info_log *L;
225 int parsing_builtin;
226 GLboolean global_scope; /**< Is object being declared a global? */
227 slang_atom_pool *atoms;
228 } slang_parse_ctx;
229
230 /* slang_output_ctx */
231
232 typedef struct slang_output_ctx_
233 {
234 slang_variable_scope *vars;
235 slang_function_scope *funs;
236 slang_struct_scope *structs;
237 slang_assembly_file *assembly;
238 slang_var_pool *global_pool;
239 slang_machine *machine;
240 } slang_output_ctx;
241
242 /* _slang_compile() */
243
244 static void
245 parse_identifier_str(slang_parse_ctx * C, char **id)
246 {
247 *id = (char *) C->I;
248 C->I += _mesa_strlen(*id) + 1;
249 }
250
251 static slang_atom
252 parse_identifier(slang_parse_ctx * C)
253 {
254 const char *id;
255
256 id = (const char *) C->I;
257 C->I += _mesa_strlen(id) + 1;
258 return slang_atom_pool_atom(C->atoms, id);
259 }
260
261 static int
262 parse_number(slang_parse_ctx * C, int *number)
263 {
264 const int radix = (int) (*C->I++);
265 *number = 0;
266 while (*C->I != '\0') {
267 int digit;
268 if (*C->I >= '0' && *C->I <= '9')
269 digit = (int) (*C->I - '0');
270 else if (*C->I >= 'A' && *C->I <= 'Z')
271 digit = (int) (*C->I - 'A') + 10;
272 else
273 digit = (int) (*C->I - 'a') + 10;
274 *number = *number * radix + digit;
275 C->I++;
276 }
277 C->I++;
278 if (*number > 65535)
279 slang_info_log_warning(C->L, "%d: literal integer overflow.", *number);
280 return 1;
281 }
282
283 static int
284 parse_float(slang_parse_ctx * C, float *number)
285 {
286 char *integral = NULL;
287 char *fractional = NULL;
288 char *exponent = NULL;
289 char *whole = NULL;
290
291 parse_identifier_str(C, &integral);
292 parse_identifier_str(C, &fractional);
293 parse_identifier_str(C, &exponent);
294
295 whole = (char *) (slang_alloc_malloc((_mesa_strlen(integral) +
296 _mesa_strlen(fractional) +
297 _mesa_strlen(exponent) + 3) * sizeof(char)));
298 if (whole == NULL) {
299 slang_info_log_memory(C->L);
300 return 0;
301 }
302
303 slang_string_copy(whole, integral);
304 slang_string_concat(whole, ".");
305 slang_string_concat(whole, fractional);
306 slang_string_concat(whole, "E");
307 slang_string_concat(whole, exponent);
308
309 *number = (float) (_mesa_strtod(whole, (char **) NULL));
310
311 slang_alloc_free(whole);
312 return 1;
313 }
314
315 /* revision number - increment after each change affecting emitted output */
316 #define REVISION 3
317
318 static int
319 check_revision(slang_parse_ctx * C)
320 {
321 if (*C->I != REVISION) {
322 slang_info_log_error(C->L, "Internal compiler error.");
323 return 0;
324 }
325 C->I++;
326 return 1;
327 }
328
329 static int parse_statement(slang_parse_ctx *, slang_output_ctx *,
330 slang_operation *);
331 static int parse_expression(slang_parse_ctx *, slang_output_ctx *,
332 slang_operation *);
333 static int parse_type_specifier(slang_parse_ctx *, slang_output_ctx *,
334 slang_type_specifier *);
335
336 static GLboolean
337 parse_array_len(slang_parse_ctx * C, slang_output_ctx * O, GLuint * len)
338 {
339 slang_operation array_size;
340 slang_assembly_name_space space;
341 GLboolean result;
342
343 if (!slang_operation_construct(&array_size))
344 return GL_FALSE;
345 if (!parse_expression(C, O, &array_size)) {
346 slang_operation_destruct(&array_size);
347 return GL_FALSE;
348 }
349
350 space.funcs = O->funs;
351 space.structs = O->structs;
352 space.vars = O->vars;
353 result = _slang_evaluate_int(O->assembly, O->machine, &space,
354 &array_size, len, C->atoms);
355 slang_operation_destruct(&array_size);
356 return result;
357 }
358
359 static GLboolean
360 calculate_var_size(slang_parse_ctx * C, slang_output_ctx * O,
361 slang_variable * var)
362 {
363 slang_storage_aggregate agg;
364
365 if (!slang_storage_aggregate_construct(&agg))
366 return GL_FALSE;
367 if (!_slang_aggregate_variable(&agg, &var->type.specifier, var->array_len,
368 O->funs, O->structs, O->vars, O->machine,
369 O->assembly, C->atoms)) {
370 slang_storage_aggregate_destruct(&agg);
371 return GL_FALSE;
372 }
373 var->size = _slang_sizeof_aggregate(&agg);
374 slang_storage_aggregate_destruct(&agg);
375 return GL_TRUE;
376 }
377
378 static GLboolean
379 convert_to_array(slang_parse_ctx * C, slang_variable * var,
380 const slang_type_specifier * sp)
381 {
382 /* sized array - mark it as array, copy the specifier to the array element and
383 * parse the expression */
384 var->type.specifier.type = slang_spec_array;
385 var->type.specifier._array = (slang_type_specifier *)
386 slang_alloc_malloc(sizeof(slang_type_specifier));
387 if (var->type.specifier._array == NULL) {
388 slang_info_log_memory(C->L);
389 return GL_FALSE;
390 }
391 slang_type_specifier_ctr(var->type.specifier._array);
392 return slang_type_specifier_copy(var->type.specifier._array, sp);
393 }
394
395 /* structure field */
396 #define FIELD_NONE 0
397 #define FIELD_NEXT 1
398 #define FIELD_ARRAY 2
399
400 static GLboolean
401 parse_struct_field_var(slang_parse_ctx * C, slang_output_ctx * O,
402 slang_variable * var, const slang_type_specifier * sp)
403 {
404 var->a_name = parse_identifier(C);
405 if (var->a_name == SLANG_ATOM_NULL)
406 return GL_FALSE;
407
408 switch (*C->I++) {
409 case FIELD_NONE:
410 if (!slang_type_specifier_copy(&var->type.specifier, sp))
411 return GL_FALSE;
412 break;
413 case FIELD_ARRAY:
414 if (!convert_to_array(C, var, sp))
415 return GL_FALSE;
416 if (!parse_array_len(C, O, &var->array_len))
417 return GL_FALSE;
418 break;
419 default:
420 return GL_FALSE;
421 }
422
423 return calculate_var_size(C, O, var);
424 }
425
426 static int
427 parse_struct_field(slang_parse_ctx * C, slang_output_ctx * O,
428 slang_struct * st, slang_type_specifier * sp)
429 {
430 slang_output_ctx o = *O;
431
432 o.structs = st->structs;
433 if (!parse_type_specifier(C, &o, sp))
434 return 0;
435
436 do {
437 slang_variable *var = slang_variable_scope_grow(st->fields);
438 if (!var) {
439 slang_info_log_memory(C->L);
440 return 0;
441 }
442 if (!parse_struct_field_var(C, &o, var, sp))
443 return 0;
444 }
445 while (*C->I++ != FIELD_NONE);
446
447 return 1;
448 }
449
450 static int
451 parse_struct(slang_parse_ctx * C, slang_output_ctx * O, slang_struct ** st)
452 {
453 slang_atom a_name;
454 const char *name;
455
456 /* parse struct name (if any) and make sure it is unique in current scope */
457 a_name = parse_identifier(C);
458 if (a_name == SLANG_ATOM_NULL)
459 return 0;
460
461 name = slang_atom_pool_id(C->atoms, a_name);
462 if (name[0] != '\0'
463 && slang_struct_scope_find(O->structs, a_name, 0) != NULL) {
464 slang_info_log_error(C->L, "%s: duplicate type name.", name);
465 return 0;
466 }
467
468 /* set-up a new struct */
469 *st = (slang_struct *) slang_alloc_malloc(sizeof(slang_struct));
470 if (*st == NULL) {
471 slang_info_log_memory(C->L);
472 return 0;
473 }
474 if (!slang_struct_construct(*st)) {
475 slang_alloc_free(*st);
476 *st = NULL;
477 slang_info_log_memory(C->L);
478 return 0;
479 }
480 (**st).a_name = a_name;
481 (**st).structs->outer_scope = O->structs;
482
483 /* parse individual struct fields */
484 do {
485 slang_type_specifier sp;
486
487 slang_type_specifier_ctr(&sp);
488 if (!parse_struct_field(C, O, *st, &sp)) {
489 slang_type_specifier_dtr(&sp);
490 return 0;
491 }
492 slang_type_specifier_dtr(&sp);
493 }
494 while (*C->I++ != FIELD_NONE);
495
496 /* if named struct, copy it to current scope */
497 if (name[0] != '\0') {
498 slang_struct *s;
499
500 O->structs->structs =
501 (slang_struct *) slang_alloc_realloc(O->structs->structs,
502 O->structs->num_structs *
503 sizeof(slang_struct),
504 (O->structs->num_structs +
505 1) * sizeof(slang_struct));
506 if (O->structs->structs == NULL) {
507 slang_info_log_memory(C->L);
508 return 0;
509 }
510 s = &O->structs->structs[O->structs->num_structs];
511 if (!slang_struct_construct(s))
512 return 0;
513 O->structs->num_structs++;
514 if (!slang_struct_copy(s, *st))
515 return 0;
516 }
517
518 return 1;
519 }
520
521
522 /* type qualifier */
523 #define TYPE_QUALIFIER_NONE 0
524 #define TYPE_QUALIFIER_CONST 1
525 #define TYPE_QUALIFIER_ATTRIBUTE 2
526 #define TYPE_QUALIFIER_VARYING 3
527 #define TYPE_QUALIFIER_UNIFORM 4
528 #define TYPE_QUALIFIER_FIXEDOUTPUT 5
529 #define TYPE_QUALIFIER_FIXEDINPUT 6
530
531 static int
532 parse_type_qualifier(slang_parse_ctx * C, slang_type_qualifier * qual)
533 {
534 switch (*C->I++) {
535 case TYPE_QUALIFIER_NONE:
536 *qual = slang_qual_none;
537 break;
538 case TYPE_QUALIFIER_CONST:
539 *qual = slang_qual_const;
540 break;
541 case TYPE_QUALIFIER_ATTRIBUTE:
542 *qual = slang_qual_attribute;
543 break;
544 case TYPE_QUALIFIER_VARYING:
545 *qual = slang_qual_varying;
546 break;
547 case TYPE_QUALIFIER_UNIFORM:
548 *qual = slang_qual_uniform;
549 break;
550 case TYPE_QUALIFIER_FIXEDOUTPUT:
551 *qual = slang_qual_fixedoutput;
552 break;
553 case TYPE_QUALIFIER_FIXEDINPUT:
554 *qual = slang_qual_fixedinput;
555 break;
556 default:
557 return 0;
558 }
559 return 1;
560 }
561
562 /* type specifier */
563 #define TYPE_SPECIFIER_VOID 0
564 #define TYPE_SPECIFIER_BOOL 1
565 #define TYPE_SPECIFIER_BVEC2 2
566 #define TYPE_SPECIFIER_BVEC3 3
567 #define TYPE_SPECIFIER_BVEC4 4
568 #define TYPE_SPECIFIER_INT 5
569 #define TYPE_SPECIFIER_IVEC2 6
570 #define TYPE_SPECIFIER_IVEC3 7
571 #define TYPE_SPECIFIER_IVEC4 8
572 #define TYPE_SPECIFIER_FLOAT 9
573 #define TYPE_SPECIFIER_VEC2 10
574 #define TYPE_SPECIFIER_VEC3 11
575 #define TYPE_SPECIFIER_VEC4 12
576 #define TYPE_SPECIFIER_MAT2 13
577 #define TYPE_SPECIFIER_MAT3 14
578 #define TYPE_SPECIFIER_MAT4 15
579 #define TYPE_SPECIFIER_SAMPLER1D 16
580 #define TYPE_SPECIFIER_SAMPLER2D 17
581 #define TYPE_SPECIFIER_SAMPLER3D 18
582 #define TYPE_SPECIFIER_SAMPLERCUBE 19
583 #define TYPE_SPECIFIER_SAMPLER1DSHADOW 20
584 #define TYPE_SPECIFIER_SAMPLER2DSHADOW 21
585 #define TYPE_SPECIFIER_STRUCT 22
586 #define TYPE_SPECIFIER_TYPENAME 23
587
588 static int
589 parse_type_specifier(slang_parse_ctx * C, slang_output_ctx * O,
590 slang_type_specifier * spec)
591 {
592 switch (*C->I++) {
593 case TYPE_SPECIFIER_VOID:
594 spec->type = slang_spec_void;
595 break;
596 case TYPE_SPECIFIER_BOOL:
597 spec->type = slang_spec_bool;
598 break;
599 case TYPE_SPECIFIER_BVEC2:
600 spec->type = slang_spec_bvec2;
601 break;
602 case TYPE_SPECIFIER_BVEC3:
603 spec->type = slang_spec_bvec3;
604 break;
605 case TYPE_SPECIFIER_BVEC4:
606 spec->type = slang_spec_bvec4;
607 break;
608 case TYPE_SPECIFIER_INT:
609 spec->type = slang_spec_int;
610 break;
611 case TYPE_SPECIFIER_IVEC2:
612 spec->type = slang_spec_ivec2;
613 break;
614 case TYPE_SPECIFIER_IVEC3:
615 spec->type = slang_spec_ivec3;
616 break;
617 case TYPE_SPECIFIER_IVEC4:
618 spec->type = slang_spec_ivec4;
619 break;
620 case TYPE_SPECIFIER_FLOAT:
621 spec->type = slang_spec_float;
622 break;
623 case TYPE_SPECIFIER_VEC2:
624 spec->type = slang_spec_vec2;
625 break;
626 case TYPE_SPECIFIER_VEC3:
627 spec->type = slang_spec_vec3;
628 break;
629 case TYPE_SPECIFIER_VEC4:
630 spec->type = slang_spec_vec4;
631 break;
632 case TYPE_SPECIFIER_MAT2:
633 spec->type = slang_spec_mat2;
634 break;
635 case TYPE_SPECIFIER_MAT3:
636 spec->type = slang_spec_mat3;
637 break;
638 case TYPE_SPECIFIER_MAT4:
639 spec->type = slang_spec_mat4;
640 break;
641 case TYPE_SPECIFIER_SAMPLER1D:
642 spec->type = slang_spec_sampler1D;
643 break;
644 case TYPE_SPECIFIER_SAMPLER2D:
645 spec->type = slang_spec_sampler2D;
646 break;
647 case TYPE_SPECIFIER_SAMPLER3D:
648 spec->type = slang_spec_sampler3D;
649 break;
650 case TYPE_SPECIFIER_SAMPLERCUBE:
651 spec->type = slang_spec_samplerCube;
652 break;
653 case TYPE_SPECIFIER_SAMPLER1DSHADOW:
654 spec->type = slang_spec_sampler1DShadow;
655 break;
656 case TYPE_SPECIFIER_SAMPLER2DSHADOW:
657 spec->type = slang_spec_sampler2DShadow;
658 break;
659 case TYPE_SPECIFIER_STRUCT:
660 spec->type = slang_spec_struct;
661 if (!parse_struct(C, O, &spec->_struct))
662 return 0;
663 break;
664 case TYPE_SPECIFIER_TYPENAME:
665 spec->type = slang_spec_struct;
666 {
667 slang_atom a_name;
668 slang_struct *stru;
669
670 a_name = parse_identifier(C);
671 if (a_name == NULL)
672 return 0;
673
674 stru = slang_struct_scope_find(O->structs, a_name, 1);
675 if (stru == NULL) {
676 slang_info_log_error(C->L, "%s: undeclared type name.",
677 slang_atom_pool_id(C->atoms, a_name));
678 return 0;
679 }
680
681 spec->_struct =
682 (slang_struct *) slang_alloc_malloc(sizeof(slang_struct));
683 if (spec->_struct == NULL) {
684 slang_info_log_memory(C->L);
685 return 0;
686 }
687 if (!slang_struct_construct(spec->_struct)) {
688 slang_alloc_free(spec->_struct);
689 spec->_struct = NULL;
690 return 0;
691 }
692 if (!slang_struct_copy(spec->_struct, stru))
693 return 0;
694 }
695 break;
696 default:
697 return 0;
698 }
699 return 1;
700 }
701
702 static int
703 parse_fully_specified_type(slang_parse_ctx * C, slang_output_ctx * O,
704 slang_fully_specified_type * type)
705 {
706 if (!parse_type_qualifier(C, &type->qualifier))
707 return 0;
708 return parse_type_specifier(C, O, &type->specifier);
709 }
710
711 /* operation */
712 #define OP_END 0
713 #define OP_BLOCK_BEGIN_NO_NEW_SCOPE 1
714 #define OP_BLOCK_BEGIN_NEW_SCOPE 2
715 #define OP_DECLARE 3
716 #define OP_ASM 4
717 #define OP_BREAK 5
718 #define OP_CONTINUE 6
719 #define OP_DISCARD 7
720 #define OP_RETURN 8
721 #define OP_EXPRESSION 9
722 #define OP_IF 10
723 #define OP_WHILE 11
724 #define OP_DO 12
725 #define OP_FOR 13
726 #define OP_PUSH_VOID 14
727 #define OP_PUSH_BOOL 15
728 #define OP_PUSH_INT 16
729 #define OP_PUSH_FLOAT 17
730 #define OP_PUSH_IDENTIFIER 18
731 #define OP_SEQUENCE 19
732 #define OP_ASSIGN 20
733 #define OP_ADDASSIGN 21
734 #define OP_SUBASSIGN 22
735 #define OP_MULASSIGN 23
736 #define OP_DIVASSIGN 24
737 /*#define OP_MODASSIGN 25*/
738 /*#define OP_LSHASSIGN 26*/
739 /*#define OP_RSHASSIGN 27*/
740 /*#define OP_ORASSIGN 28*/
741 /*#define OP_XORASSIGN 29*/
742 /*#define OP_ANDASSIGN 30*/
743 #define OP_SELECT 31
744 #define OP_LOGICALOR 32
745 #define OP_LOGICALXOR 33
746 #define OP_LOGICALAND 34
747 /*#define OP_BITOR 35*/
748 /*#define OP_BITXOR 36*/
749 /*#define OP_BITAND 37*/
750 #define OP_EQUAL 38
751 #define OP_NOTEQUAL 39
752 #define OP_LESS 40
753 #define OP_GREATER 41
754 #define OP_LESSEQUAL 42
755 #define OP_GREATEREQUAL 43
756 /*#define OP_LSHIFT 44*/
757 /*#define OP_RSHIFT 45*/
758 #define OP_ADD 46
759 #define OP_SUBTRACT 47
760 #define OP_MULTIPLY 48
761 #define OP_DIVIDE 49
762 /*#define OP_MODULUS 50*/
763 #define OP_PREINCREMENT 51
764 #define OP_PREDECREMENT 52
765 #define OP_PLUS 53
766 #define OP_MINUS 54
767 /*#define OP_COMPLEMENT 55*/
768 #define OP_NOT 56
769 #define OP_SUBSCRIPT 57
770 #define OP_CALL 58
771 #define OP_FIELD 59
772 #define OP_POSTINCREMENT 60
773 #define OP_POSTDECREMENT 61
774
775
776 /**
777 * When parsing a compound production, this function is used to parse the
778 * children.
779 * For example, a a while-loop compound will have two children, the
780 * while condition expression and the loop body. So, this function will
781 * be called twice to parse those two sub-expressions.
782 * \param C the parsing context
783 * \param O the output context
784 * \param oper the operation we're parsing
785 * \param statment which child of the operation is being parsed
786 * \return 1 if success, 0 if error
787 */
788 static int
789 parse_child_operation(slang_parse_ctx * C, slang_output_ctx * O,
790 slang_operation * oper, unsigned int statement)
791 {
792 slang_operation *ch;
793
794 /* grow child array */
795 oper->children = (slang_operation *)
796 slang_alloc_realloc(oper->children,
797 oper->num_children * sizeof(slang_operation),
798 (oper->num_children + 1) * sizeof(slang_operation));
799 if (oper->children == NULL) {
800 slang_info_log_memory(C->L);
801 return 0;
802 }
803
804 ch = &oper->children[oper->num_children];
805 if (!slang_operation_construct(ch)) {
806 slang_info_log_memory(C->L);
807 return 0;
808 }
809 oper->num_children++;
810 /* XXX I guess the 0th "statement" is not really a statement? */
811 if (statement)
812 return parse_statement(C, O, ch);
813 return parse_expression(C, O, ch);
814 }
815
816 static int parse_declaration(slang_parse_ctx * C, slang_output_ctx * O);
817
818 static int
819 parse_statement(slang_parse_ctx * C, slang_output_ctx * O,
820 slang_operation * oper)
821 {
822 oper->locals->outer_scope = O->vars;
823 switch (*C->I++) {
824 case OP_BLOCK_BEGIN_NO_NEW_SCOPE:
825 /* parse child statements, do not create new variable scope */
826 oper->type = slang_oper_block_no_new_scope;
827 while (*C->I != OP_END)
828 if (!parse_child_operation(C, O, oper, 1))
829 return 0;
830 C->I++;
831 break;
832 case OP_BLOCK_BEGIN_NEW_SCOPE:
833 /* parse child statements, create new variable scope */
834 {
835 slang_output_ctx o = *O;
836
837 oper->type = slang_oper_block_new_scope;
838 o.vars = oper->locals;
839 while (*C->I != OP_END)
840 if (!parse_child_operation(C, &o, oper, 1))
841 return 0;
842 C->I++;
843 }
844 break;
845 case OP_DECLARE:
846 /* local variable declaration, individual declarators are stored as
847 * children identifiers
848 */
849 oper->type = slang_oper_variable_decl;
850 {
851 const unsigned int first_var = O->vars->num_variables;
852
853 /* parse the declaration, note that there can be zero or more
854 * than one declarators
855 */
856 if (!parse_declaration(C, O))
857 return 0;
858 if (first_var < O->vars->num_variables) {
859 const unsigned int num_vars = O->vars->num_variables - first_var;
860 unsigned int i;
861
862 oper->children = (slang_operation *)
863 slang_alloc_malloc(num_vars * sizeof(slang_operation));
864 if (oper->children == NULL) {
865 slang_info_log_memory(C->L);
866 return 0;
867 }
868 for (oper->num_children = 0; oper->num_children < num_vars;
869 oper->num_children++) {
870 if (!slang_operation_construct
871 (&oper->children[oper->num_children])) {
872 slang_info_log_memory(C->L);
873 return 0;
874 }
875 }
876 for (i = first_var; i < O->vars->num_variables; i++) {
877 slang_operation *o = &oper->children[i - first_var];
878 o->type = slang_oper_identifier;
879 o->locals->outer_scope = O->vars;
880 o->a_id = O->vars->variables[i].a_name;
881 }
882 }
883 }
884 break;
885 case OP_ASM:
886 /* the __asm statement, parse the mnemonic and all its arguments
887 * as expressions
888 */
889 oper->type = slang_oper_asm;
890 oper->a_id = parse_identifier(C);
891 if (oper->a_id == SLANG_ATOM_NULL)
892 return 0;
893 while (*C->I != OP_END) {
894 if (!parse_child_operation(C, O, oper, 0))
895 return 0;
896 }
897 C->I++;
898 break;
899 case OP_BREAK:
900 oper->type = slang_oper_break;
901 break;
902 case OP_CONTINUE:
903 oper->type = slang_oper_continue;
904 break;
905 case OP_DISCARD:
906 oper->type = slang_oper_discard;
907 break;
908 case OP_RETURN:
909 oper->type = slang_oper_return;
910 if (!parse_child_operation(C, O, oper, 0))
911 return 0;
912 break;
913 case OP_EXPRESSION:
914 oper->type = slang_oper_expression;
915 if (!parse_child_operation(C, O, oper, 0))
916 return 0;
917 break;
918 case OP_IF:
919 oper->type = slang_oper_if;
920 if (!parse_child_operation(C, O, oper, 0))
921 return 0;
922 if (!parse_child_operation(C, O, oper, 1))
923 return 0;
924 if (!parse_child_operation(C, O, oper, 1))
925 return 0;
926 break;
927 case OP_WHILE:
928 {
929 slang_output_ctx o = *O;
930
931 oper->type = slang_oper_while;
932 o.vars = oper->locals;
933 if (!parse_child_operation(C, &o, oper, 1))
934 return 0;
935 if (!parse_child_operation(C, &o, oper, 1))
936 return 0;
937 }
938 break;
939 case OP_DO:
940 oper->type = slang_oper_do;
941 if (!parse_child_operation(C, O, oper, 1))
942 return 0;
943 if (!parse_child_operation(C, O, oper, 0))
944 return 0;
945 break;
946 case OP_FOR:
947 {
948 slang_output_ctx o = *O;
949
950 oper->type = slang_oper_for;
951 o.vars = oper->locals;
952 if (!parse_child_operation(C, &o, oper, 1))
953 return 0;
954 if (!parse_child_operation(C, &o, oper, 1))
955 return 0;
956 if (!parse_child_operation(C, &o, oper, 0))
957 return 0;
958 if (!parse_child_operation(C, &o, oper, 1))
959 return 0;
960 }
961 break;
962 default:
963 return 0;
964 }
965 return 1;
966 }
967
968 static int
969 handle_nary_expression(slang_parse_ctx * C, slang_operation * op,
970 slang_operation ** ops, unsigned int *total_ops,
971 unsigned int n)
972 {
973 unsigned int i;
974
975 op->children =
976 (slang_operation *) slang_alloc_malloc(n * sizeof(slang_operation));
977 if (op->children == NULL) {
978 slang_info_log_memory(C->L);
979 return 0;
980 }
981 op->num_children = n;
982
983 for (i = 0; i < n; i++)
984 op->children[i] = (*ops)[*total_ops - (n + 1 - i)];
985 (*ops)[*total_ops - (n + 1)] = (*ops)[*total_ops - 1];
986 *total_ops -= n;
987
988 *ops = (slang_operation *)
989 slang_alloc_realloc(*ops,
990 (*total_ops + n) * sizeof(slang_operation),
991 *total_ops * sizeof(slang_operation));
992 if (*ops == NULL) {
993 slang_info_log_memory(C->L);
994 return 0;
995 }
996 return 1;
997 }
998
999 static int
1000 is_constructor_name(const char *name, slang_atom a_name,
1001 slang_struct_scope * structs)
1002 {
1003 if (slang_type_specifier_type_from_string(name) != slang_spec_void)
1004 return 1;
1005 return slang_struct_scope_find(structs, a_name, 1) != NULL;
1006 }
1007
1008 static int
1009 parse_expression(slang_parse_ctx * C, slang_output_ctx * O,
1010 slang_operation * oper)
1011 {
1012 slang_operation *ops = NULL;
1013 unsigned int num_ops = 0;
1014 int number;
1015
1016 while (*C->I != OP_END) {
1017 slang_operation *op;
1018 const unsigned int op_code = *C->I++;
1019
1020 /* allocate default operation, becomes a no-op if not used */
1021 ops = (slang_operation *)
1022 slang_alloc_realloc(ops,
1023 num_ops * sizeof(slang_operation),
1024 (num_ops + 1) * sizeof(slang_operation));
1025 if (ops == NULL) {
1026 slang_info_log_memory(C->L);
1027 return 0;
1028 }
1029 op = &ops[num_ops];
1030 if (!slang_operation_construct(op)) {
1031 slang_info_log_memory(C->L);
1032 return 0;
1033 }
1034 num_ops++;
1035 op->locals->outer_scope = O->vars;
1036
1037 switch (op_code) {
1038 case OP_PUSH_VOID:
1039 op->type = slang_oper_void;
1040 break;
1041 case OP_PUSH_BOOL:
1042 op->type = slang_oper_literal_bool;
1043 if (!parse_number(C, &number))
1044 return 0;
1045 op->literal = (GLfloat) number;
1046 break;
1047 case OP_PUSH_INT:
1048 op->type = slang_oper_literal_int;
1049 if (!parse_number(C, &number))
1050 return 0;
1051 op->literal = (GLfloat) number;
1052 break;
1053 case OP_PUSH_FLOAT:
1054 op->type = slang_oper_literal_float;
1055 if (!parse_float(C, &op->literal))
1056 return 0;
1057 break;
1058 case OP_PUSH_IDENTIFIER:
1059 op->type = slang_oper_identifier;
1060 op->a_id = parse_identifier(C);
1061 if (op->a_id == SLANG_ATOM_NULL)
1062 return 0;
1063 break;
1064 case OP_SEQUENCE:
1065 op->type = slang_oper_sequence;
1066 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1067 return 0;
1068 break;
1069 case OP_ASSIGN:
1070 op->type = slang_oper_assign;
1071 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1072 return 0;
1073 break;
1074 case OP_ADDASSIGN:
1075 op->type = slang_oper_addassign;
1076 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1077 return 0;
1078 break;
1079 case OP_SUBASSIGN:
1080 op->type = slang_oper_subassign;
1081 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1082 return 0;
1083 break;
1084 case OP_MULASSIGN:
1085 op->type = slang_oper_mulassign;
1086 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1087 return 0;
1088 break;
1089 case OP_DIVASSIGN:
1090 op->type = slang_oper_divassign;
1091 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1092 return 0;
1093 break;
1094 /*case OP_MODASSIGN: */
1095 /*case OP_LSHASSIGN: */
1096 /*case OP_RSHASSIGN: */
1097 /*case OP_ORASSIGN: */
1098 /*case OP_XORASSIGN: */
1099 /*case OP_ANDASSIGN: */
1100 case OP_SELECT:
1101 op->type = slang_oper_select;
1102 if (!handle_nary_expression(C, op, &ops, &num_ops, 3))
1103 return 0;
1104 break;
1105 case OP_LOGICALOR:
1106 op->type = slang_oper_logicalor;
1107 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1108 return 0;
1109 break;
1110 case OP_LOGICALXOR:
1111 op->type = slang_oper_logicalxor;
1112 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1113 return 0;
1114 break;
1115 case OP_LOGICALAND:
1116 op->type = slang_oper_logicaland;
1117 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1118 return 0;
1119 break;
1120 /*case OP_BITOR: */
1121 /*case OP_BITXOR: */
1122 /*case OP_BITAND: */
1123 case OP_EQUAL:
1124 op->type = slang_oper_equal;
1125 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1126 return 0;
1127 break;
1128 case OP_NOTEQUAL:
1129 op->type = slang_oper_notequal;
1130 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1131 return 0;
1132 break;
1133 case OP_LESS:
1134 op->type = slang_oper_less;
1135 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1136 return 0;
1137 break;
1138 case OP_GREATER:
1139 op->type = slang_oper_greater;
1140 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1141 return 0;
1142 break;
1143 case OP_LESSEQUAL:
1144 op->type = slang_oper_lessequal;
1145 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1146 return 0;
1147 break;
1148 case OP_GREATEREQUAL:
1149 op->type = slang_oper_greaterequal;
1150 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1151 return 0;
1152 break;
1153 /*case OP_LSHIFT: */
1154 /*case OP_RSHIFT: */
1155 case OP_ADD:
1156 op->type = slang_oper_add;
1157 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1158 return 0;
1159 break;
1160 case OP_SUBTRACT:
1161 op->type = slang_oper_subtract;
1162 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1163 return 0;
1164 break;
1165 case OP_MULTIPLY:
1166 op->type = slang_oper_multiply;
1167 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1168 return 0;
1169 break;
1170 case OP_DIVIDE:
1171 op->type = slang_oper_divide;
1172 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1173 return 0;
1174 break;
1175 /*case OP_MODULUS: */
1176 case OP_PREINCREMENT:
1177 op->type = slang_oper_preincrement;
1178 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1179 return 0;
1180 break;
1181 case OP_PREDECREMENT:
1182 op->type = slang_oper_predecrement;
1183 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1184 return 0;
1185 break;
1186 case OP_PLUS:
1187 op->type = slang_oper_plus;
1188 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1189 return 0;
1190 break;
1191 case OP_MINUS:
1192 op->type = slang_oper_minus;
1193 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1194 return 0;
1195 break;
1196 case OP_NOT:
1197 op->type = slang_oper_not;
1198 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1199 return 0;
1200 break;
1201 /*case OP_COMPLEMENT: */
1202 case OP_SUBSCRIPT:
1203 op->type = slang_oper_subscript;
1204 if (!handle_nary_expression(C, op, &ops, &num_ops, 2))
1205 return 0;
1206 break;
1207 case OP_CALL:
1208 op->type = slang_oper_call;
1209 op->a_id = parse_identifier(C);
1210 if (op->a_id == SLANG_ATOM_NULL)
1211 return 0;
1212 while (*C->I != OP_END)
1213 if (!parse_child_operation(C, O, op, 0))
1214 return 0;
1215 C->I++;
1216
1217 if (!C->parsing_builtin
1218 && !slang_function_scope_find_by_name(O->funs, op->a_id, 1)) {
1219 const char *id;
1220
1221 id = slang_atom_pool_id(C->atoms, op->a_id);
1222 if (!is_constructor_name(id, op->a_id, O->structs)) {
1223 slang_info_log_error(C->L, "%s: undeclared function name.", id);
1224 return 0;
1225 }
1226 }
1227 break;
1228 case OP_FIELD:
1229 op->type = slang_oper_field;
1230 op->a_id = parse_identifier(C);
1231 if (op->a_id == SLANG_ATOM_NULL)
1232 return 0;
1233 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1234 return 0;
1235 break;
1236 case OP_POSTINCREMENT:
1237 op->type = slang_oper_postincrement;
1238 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1239 return 0;
1240 break;
1241 case OP_POSTDECREMENT:
1242 op->type = slang_oper_postdecrement;
1243 if (!handle_nary_expression(C, op, &ops, &num_ops, 1))
1244 return 0;
1245 break;
1246 default:
1247 return 0;
1248 }
1249 }
1250 C->I++;
1251
1252 *oper = *ops;
1253 slang_alloc_free(ops);
1254
1255 return 1;
1256 }
1257
1258 /* parameter qualifier */
1259 #define PARAM_QUALIFIER_IN 0
1260 #define PARAM_QUALIFIER_OUT 1
1261 #define PARAM_QUALIFIER_INOUT 2
1262
1263 /* function parameter array presence */
1264 #define PARAMETER_ARRAY_NOT_PRESENT 0
1265 #define PARAMETER_ARRAY_PRESENT 1
1266
1267 static int
1268 parse_parameter_declaration(slang_parse_ctx * C, slang_output_ctx * O,
1269 slang_variable * param)
1270 {
1271 /* parse and validate the parameter's type qualifiers (there can be
1272 * two at most) because not all combinations are valid
1273 */
1274 if (!parse_type_qualifier(C, &param->type.qualifier))
1275 return 0;
1276 switch (*C->I++) {
1277 case PARAM_QUALIFIER_IN:
1278 if (param->type.qualifier != slang_qual_const
1279 && param->type.qualifier != slang_qual_none) {
1280 slang_info_log_error(C->L, "Invalid type qualifier.");
1281 return 0;
1282 }
1283 break;
1284 case PARAM_QUALIFIER_OUT:
1285 if (param->type.qualifier == slang_qual_none)
1286 param->type.qualifier = slang_qual_out;
1287 else {
1288 slang_info_log_error(C->L, "Invalid type qualifier.");
1289 return 0;
1290 }
1291 break;
1292 case PARAM_QUALIFIER_INOUT:
1293 if (param->type.qualifier == slang_qual_none)
1294 param->type.qualifier = slang_qual_inout;
1295 else {
1296 slang_info_log_error(C->L, "Invalid type qualifier.");
1297 return 0;
1298 }
1299 break;
1300 default:
1301 return 0;
1302 }
1303
1304 /* parse parameter's type specifier and name */
1305 if (!parse_type_specifier(C, O, &param->type.specifier))
1306 return 0;
1307 param->a_name = parse_identifier(C);
1308 if (param->a_name == SLANG_ATOM_NULL)
1309 return 0;
1310
1311 /* if the parameter is an array, parse its size (the size must be
1312 * explicitly defined
1313 */
1314 if (*C->I++ == PARAMETER_ARRAY_PRESENT) {
1315 slang_type_specifier p;
1316
1317 slang_type_specifier_ctr(&p);
1318 if (!slang_type_specifier_copy(&p, &param->type.specifier)) {
1319 slang_type_specifier_dtr(&p);
1320 return GL_FALSE;
1321 }
1322 if (!convert_to_array(C, param, &p)) {
1323 slang_type_specifier_dtr(&p);
1324 return GL_FALSE;
1325 }
1326 slang_type_specifier_dtr(&p);
1327 if (!parse_array_len(C, O, &param->array_len))
1328 return GL_FALSE;
1329 }
1330
1331 /* calculate the parameter size */
1332 if (!calculate_var_size(C, O, param))
1333 return GL_FALSE;
1334
1335 /* TODO: allocate the local address here? */
1336 return 1;
1337 }
1338
1339 /* function type */
1340 #define FUNCTION_ORDINARY 0
1341 #define FUNCTION_CONSTRUCTOR 1
1342 #define FUNCTION_OPERATOR 2
1343
1344 /* function parameter */
1345 #define PARAMETER_NONE 0
1346 #define PARAMETER_NEXT 1
1347
1348 /* operator type */
1349 #define OPERATOR_ADDASSIGN 1
1350 #define OPERATOR_SUBASSIGN 2
1351 #define OPERATOR_MULASSIGN 3
1352 #define OPERATOR_DIVASSIGN 4
1353 /*#define OPERATOR_MODASSIGN 5*/
1354 /*#define OPERATOR_LSHASSIGN 6*/
1355 /*#define OPERATOR_RSHASSIGN 7*/
1356 /*#define OPERATOR_ANDASSIGN 8*/
1357 /*#define OPERATOR_XORASSIGN 9*/
1358 /*#define OPERATOR_ORASSIGN 10*/
1359 #define OPERATOR_LOGICALXOR 11
1360 /*#define OPERATOR_BITOR 12*/
1361 /*#define OPERATOR_BITXOR 13*/
1362 /*#define OPERATOR_BITAND 14*/
1363 #define OPERATOR_LESS 15
1364 #define OPERATOR_GREATER 16
1365 #define OPERATOR_LESSEQUAL 17
1366 #define OPERATOR_GREATEREQUAL 18
1367 /*#define OPERATOR_LSHIFT 19*/
1368 /*#define OPERATOR_RSHIFT 20*/
1369 #define OPERATOR_MULTIPLY 21
1370 #define OPERATOR_DIVIDE 22
1371 /*#define OPERATOR_MODULUS 23*/
1372 #define OPERATOR_INCREMENT 24
1373 #define OPERATOR_DECREMENT 25
1374 #define OPERATOR_PLUS 26
1375 #define OPERATOR_MINUS 27
1376 /*#define OPERATOR_COMPLEMENT 28*/
1377 #define OPERATOR_NOT 29
1378
1379 static const struct
1380 {
1381 unsigned int o_code;
1382 const char *o_name;
1383 } operator_names[] = {
1384 {OPERATOR_INCREMENT, "++"},
1385 {OPERATOR_ADDASSIGN, "+="},
1386 {OPERATOR_PLUS, "+"},
1387 {OPERATOR_DECREMENT, "--"},
1388 {OPERATOR_SUBASSIGN, "-="},
1389 {OPERATOR_MINUS, "-"},
1390 {OPERATOR_NOT, "!"},
1391 {OPERATOR_MULASSIGN, "*="},
1392 {OPERATOR_MULTIPLY, "*"},
1393 {OPERATOR_DIVASSIGN, "/="},
1394 {OPERATOR_DIVIDE, "/"},
1395 {OPERATOR_LESSEQUAL, "<="},
1396 /*{ OPERATOR_LSHASSIGN, "<<=" }, */
1397 /*{ OPERATOR_LSHIFT, "<<" }, */
1398 {OPERATOR_LESS, "<"},
1399 {OPERATOR_GREATEREQUAL, ">="},
1400 /*{ OPERATOR_RSHASSIGN, ">>=" }, */
1401 /*{ OPERATOR_RSHIFT, ">>" }, */
1402 {OPERATOR_GREATER, ">"},
1403 /*{ OPERATOR_MODASSIGN, "%=" }, */
1404 /*{ OPERATOR_MODULUS, "%" }, */
1405 /*{ OPERATOR_ANDASSIGN, "&=" }, */
1406 /*{ OPERATOR_BITAND, "&" }, */
1407 /*{ OPERATOR_ORASSIGN, "|=" }, */
1408 /*{ OPERATOR_BITOR, "|" }, */
1409 /*{ OPERATOR_COMPLEMENT, "~" }, */
1410 /*{ OPERATOR_XORASSIGN, "^=" }, */
1411 {OPERATOR_LOGICALXOR, "^^"},
1412 /*{ OPERATOR_BITXOR, "^" } */
1413 };
1414
1415 static slang_atom
1416 parse_operator_name(slang_parse_ctx * C)
1417 {
1418 unsigned int i;
1419
1420 for (i = 0; i < sizeof(operator_names) / sizeof(*operator_names); i++) {
1421 if (operator_names[i].o_code == (unsigned int) (*C->I)) {
1422 slang_atom atom =
1423 slang_atom_pool_atom(C->atoms, operator_names[i].o_name);
1424 if (atom == SLANG_ATOM_NULL) {
1425 slang_info_log_memory(C->L);
1426 return 0;
1427 }
1428 C->I++;
1429 return atom;
1430 }
1431 }
1432 return 0;
1433 }
1434
1435 static int
1436 parse_function_prototype(slang_parse_ctx * C, slang_output_ctx * O,
1437 slang_function * func)
1438 {
1439 /* parse function type and name */
1440 if (!parse_fully_specified_type(C, O, &func->header.type))
1441 return 0;
1442 switch (*C->I++) {
1443 case FUNCTION_ORDINARY:
1444 func->kind = slang_func_ordinary;
1445 func->header.a_name = parse_identifier(C);
1446 if (func->header.a_name == SLANG_ATOM_NULL)
1447 return 0;
1448 break;
1449 case FUNCTION_CONSTRUCTOR:
1450 func->kind = slang_func_constructor;
1451 if (func->header.type.specifier.type == slang_spec_struct)
1452 return 0;
1453 func->header.a_name =
1454 slang_atom_pool_atom(C->atoms,
1455 slang_type_specifier_type_to_string
1456 (func->header.type.specifier.type));
1457 if (func->header.a_name == SLANG_ATOM_NULL) {
1458 slang_info_log_memory(C->L);
1459 return 0;
1460 }
1461 break;
1462 case FUNCTION_OPERATOR:
1463 func->kind = slang_func_operator;
1464 func->header.a_name = parse_operator_name(C);
1465 if (func->header.a_name == SLANG_ATOM_NULL)
1466 return 0;
1467 break;
1468 default:
1469 return 0;
1470 }
1471
1472 /* parse function parameters */
1473 while (*C->I++ == PARAMETER_NEXT) {
1474 slang_variable *p = slang_variable_scope_grow(func->parameters);
1475 if (!p) {
1476 slang_info_log_memory(C->L);
1477 return 0;
1478 }
1479 if (!parse_parameter_declaration(C, O, p))
1480 return 0;
1481 }
1482
1483 /* function formal parameters and local variables share the same
1484 * scope, so save the information about param count in a seperate
1485 * place also link the scope to the global variable scope so when a
1486 * given identifier is not found here, the search process continues
1487 * in the global space
1488 */
1489 func->param_count = func->parameters->num_variables;
1490 func->parameters->outer_scope = O->vars;
1491 return 1;
1492 }
1493
1494 static int
1495 parse_function_definition(slang_parse_ctx * C, slang_output_ctx * O,
1496 slang_function * func)
1497 {
1498 slang_output_ctx o = *O;
1499
1500 if (!parse_function_prototype(C, O, func))
1501 return 0;
1502
1503 /* create function's body operation */
1504 func->body =
1505 (slang_operation *) slang_alloc_malloc(sizeof(slang_operation));
1506 if (func->body == NULL) {
1507 slang_info_log_memory(C->L);
1508 return 0;
1509 }
1510 if (!slang_operation_construct(func->body)) {
1511 slang_alloc_free(func->body);
1512 func->body = NULL;
1513 slang_info_log_memory(C->L);
1514 return 0;
1515 }
1516
1517 /* to parse the body the parse context is modified in order to
1518 * capture parsed variables into function's local variable scope
1519 */
1520 C->global_scope = GL_FALSE;
1521 o.vars = func->parameters;
1522 if (!parse_statement(C, &o, func->body))
1523 return 0;
1524
1525 C->global_scope = GL_TRUE;
1526 return 1;
1527 }
1528
1529 static GLboolean
1530 initialize_global(slang_assemble_ctx * A, slang_variable * var)
1531 {
1532 slang_assembly_file_restore_point point;
1533 slang_machine mach;
1534 slang_assembly_local_info save_local = A->local;
1535 slang_operation op_id, op_assign;
1536 GLboolean result;
1537
1538 /* save the current assembly */
1539 if (!slang_assembly_file_restore_point_save(A->file, &point))
1540 return GL_FALSE;
1541
1542 /* setup the machine */
1543 mach = *A->mach;
1544 mach.ip = A->file->count;
1545
1546 /* allocate local storage for expression */
1547 A->local.ret_size = 0;
1548 A->local.addr_tmp = 0;
1549 A->local.swizzle_tmp = 4;
1550 if (!slang_assembly_file_push_label(A->file, slang_asm_local_alloc, 20))
1551 return GL_FALSE;
1552 if (!slang_assembly_file_push_label(A->file, slang_asm_enter, 20))
1553 return GL_FALSE;
1554
1555 /* construct the left side of assignment */
1556 if (!slang_operation_construct(&op_id))
1557 return GL_FALSE;
1558 op_id.type = slang_oper_identifier;
1559 op_id.a_id = var->a_name;
1560
1561 /* put the variable into operation's scope */
1562 op_id.locals->variables =
1563 (slang_variable *) slang_alloc_malloc(sizeof(slang_variable));
1564 if (op_id.locals->variables == NULL) {
1565 slang_operation_destruct(&op_id);
1566 return GL_FALSE;
1567 }
1568 op_id.locals->num_variables = 1;
1569 op_id.locals->variables[0] = *var;
1570
1571 /* construct the assignment expression */
1572 if (!slang_operation_construct(&op_assign)) {
1573 op_id.locals->num_variables = 0;
1574 slang_operation_destruct(&op_id);
1575 return GL_FALSE;
1576 }
1577 op_assign.type = slang_oper_assign;
1578 op_assign.children =
1579 (slang_operation *) slang_alloc_malloc(2 * sizeof(slang_operation));
1580 if (op_assign.children == NULL) {
1581 slang_operation_destruct(&op_assign);
1582 op_id.locals->num_variables = 0;
1583 slang_operation_destruct(&op_id);
1584 return GL_FALSE;
1585 }
1586 op_assign.num_children = 2;
1587 op_assign.children[0] = op_id;
1588 op_assign.children[1] = *var->initializer;
1589
1590 /* insert the actual expression */
1591 result = _slang_assemble_operation(A, &op_assign, slang_ref_forbid);
1592
1593 /* carefully destroy the operations */
1594 op_assign.num_children = 0;
1595 slang_alloc_free(op_assign.children);
1596 op_assign.children = NULL;
1597 slang_operation_destruct(&op_assign);
1598 op_id.locals->num_variables = 0;
1599 slang_operation_destruct(&op_id);
1600
1601 if (!result)
1602 return GL_FALSE;
1603 if (!slang_assembly_file_push(A->file, slang_asm_exit))
1604 return GL_FALSE;
1605
1606 /* execute the expression */
1607 if (!_slang_execute2(A->file, &mach))
1608 return GL_FALSE;
1609
1610 /* restore the old assembly */
1611 if (!slang_assembly_file_restore_point_load(A->file, &point))
1612 return GL_FALSE;
1613 A->local = save_local;
1614
1615 /* now we copy the contents of the initialized variable back to the original machine */
1616 _mesa_memcpy((GLubyte *) A->mach->mem + var->address,
1617 (GLubyte *) mach.mem + var->address, var->size);
1618
1619 return GL_TRUE;
1620 }
1621
1622 /* init declarator list */
1623 #define DECLARATOR_NONE 0
1624 #define DECLARATOR_NEXT 1
1625
1626 /* variable declaration */
1627 #define VARIABLE_NONE 0
1628 #define VARIABLE_IDENTIFIER 1
1629 #define VARIABLE_INITIALIZER 2
1630 #define VARIABLE_ARRAY_EXPLICIT 3
1631 #define VARIABLE_ARRAY_UNKNOWN 4
1632
1633
1634 /**
1635 * Parse the initializer for a variable declaration.
1636 */
1637 static int
1638 parse_init_declarator(slang_parse_ctx * C, slang_output_ctx * O,
1639 const slang_fully_specified_type * type)
1640 {
1641 slang_variable *var;
1642
1643 /* empty init declatator (without name, e.g. "float ;") */
1644 if (*C->I++ == VARIABLE_NONE)
1645 return 1;
1646
1647 /* make room for the new variable and initialize it */
1648 var = slang_variable_scope_grow(O->vars);
1649 if (!var) {
1650 slang_info_log_memory(C->L);
1651 return 0;
1652 }
1653
1654 /* copy the declarator qualifier type, parse the identifier */
1655 var->global = C->global_scope;
1656 var->type.qualifier = type->qualifier;
1657 var->a_name = parse_identifier(C);
1658 if (var->a_name == SLANG_ATOM_NULL)
1659 return 0;
1660
1661 switch (*C->I++) {
1662 case VARIABLE_NONE:
1663 /* simple variable declarator - just copy the specifier */
1664 if (!slang_type_specifier_copy(&var->type.specifier, &type->specifier))
1665 return 0;
1666 break;
1667 case VARIABLE_INITIALIZER:
1668 /* initialized variable - copy the specifier and parse the expression */
1669 if (!slang_type_specifier_copy(&var->type.specifier, &type->specifier))
1670 return 0;
1671 var->initializer =
1672 (slang_operation *) slang_alloc_malloc(sizeof(slang_operation));
1673 if (var->initializer == NULL) {
1674 slang_info_log_memory(C->L);
1675 return 0;
1676 }
1677 if (!slang_operation_construct(var->initializer)) {
1678 slang_alloc_free(var->initializer);
1679 var->initializer = NULL;
1680 slang_info_log_memory(C->L);
1681 return 0;
1682 }
1683 if (!parse_expression(C, O, var->initializer))
1684 return 0;
1685 break;
1686 #if 0
1687 case VARIABLE_ARRAY_UNKNOWN:
1688 /* unsized array - mark it as array and copy the specifier to
1689 the array element
1690 */
1691 if (!convert_to_array(C, var, &type->specifier))
1692 return GL_FALSE;
1693 break;
1694 #endif
1695 case VARIABLE_ARRAY_EXPLICIT:
1696 if (!convert_to_array(C, var, &type->specifier))
1697 return GL_FALSE;
1698 if (!parse_array_len(C, O, &var->array_len))
1699 return GL_FALSE;
1700 break;
1701 default:
1702 return 0;
1703 }
1704
1705 /* allocate global address space for a variable with a known size */
1706 if (C->global_scope
1707 && !(var->type.specifier.type == slang_spec_array
1708 && var->array_len == 0)) {
1709 if (!calculate_var_size(C, O, var))
1710 return GL_FALSE;
1711 var->address = slang_var_pool_alloc(O->global_pool, var->size);
1712 }
1713
1714 /* initialize global variable */
1715 if (C->global_scope) {
1716 if (var->initializer != NULL) {
1717 slang_assemble_ctx A;
1718
1719 A.file = O->assembly;
1720 A.mach = O->machine;
1721 A.atoms = C->atoms;
1722 A.space.funcs = O->funs;
1723 A.space.structs = O->structs;
1724 A.space.vars = O->vars;
1725 if (!initialize_global(&A, var))
1726 return 0;
1727 }
1728 else {
1729 _mesa_memset((GLubyte *) (O->machine->mem) + var->address, 0,
1730 var->size);
1731 }
1732 }
1733 return 1;
1734 }
1735
1736 /**
1737 * Parse a list of variable declarations. Each variable may have an
1738 * initializer.
1739 */
1740 static int
1741 parse_init_declarator_list(slang_parse_ctx * C, slang_output_ctx * O)
1742 {
1743 slang_fully_specified_type type;
1744
1745 /* parse the fully specified type, common to all declarators */
1746 if (!slang_fully_specified_type_construct(&type))
1747 return 0;
1748 if (!parse_fully_specified_type(C, O, &type)) {
1749 slang_fully_specified_type_destruct(&type);
1750 return 0;
1751 }
1752
1753 /* parse declarators, pass-in the parsed type */
1754 do {
1755 if (!parse_init_declarator(C, O, &type)) {
1756 slang_fully_specified_type_destruct(&type);
1757 return 0;
1758 }
1759 }
1760 while (*C->I++ == DECLARATOR_NEXT);
1761
1762 slang_fully_specified_type_destruct(&type);
1763 return 1;
1764 }
1765
1766
1767 /**
1768 * Parse a function definition or declaration.
1769 * \param C parsing context
1770 * \param O output context
1771 * \param definition if non-zero expect a definition, else a declaration
1772 * \param parsed_func_ret returns the parsed function
1773 * \return 1 if success, 0 if failure
1774 */
1775 static int
1776 parse_function(slang_parse_ctx * C, slang_output_ctx * O, int definition,
1777 slang_function ** parsed_func_ret)
1778 {
1779 slang_function parsed_func, *found_func;
1780
1781 /* parse function definition/declaration */
1782 if (!slang_function_construct(&parsed_func))
1783 return 0;
1784 if (definition) {
1785 if (!parse_function_definition(C, O, &parsed_func)) {
1786 slang_function_destruct(&parsed_func);
1787 return 0;
1788 }
1789 }
1790 else {
1791 if (!parse_function_prototype(C, O, &parsed_func)) {
1792 slang_function_destruct(&parsed_func);
1793 return 0;
1794 }
1795 }
1796
1797 /* find a function with a prototype matching the parsed one - only
1798 * the current scope is being searched to allow built-in function
1799 * overriding
1800 */
1801 found_func = slang_function_scope_find(O->funs, &parsed_func, 0);
1802 if (found_func == NULL) {
1803 /* add the parsed function to the function list */
1804 O->funs->functions =
1805 (slang_function *) slang_alloc_realloc(O->funs->functions,
1806 O->funs->num_functions *
1807 sizeof(slang_function),
1808 (O->funs->num_functions +
1809 1) * sizeof(slang_function));
1810 if (O->funs->functions == NULL) {
1811 slang_info_log_memory(C->L);
1812 slang_function_destruct(&parsed_func);
1813 return 0;
1814 }
1815 O->funs->functions[O->funs->num_functions] = parsed_func;
1816 O->funs->num_functions++;
1817
1818 /* return the newly parsed function */
1819 *parsed_func_ret = &O->funs->functions[O->funs->num_functions - 1];
1820 }
1821 else {
1822 /* TODO: check function return type qualifiers and specifiers */
1823 if (definition) {
1824 if (found_func->body != NULL) {
1825 slang_info_log_error(C->L, "%s: function already has a body.",
1826 slang_atom_pool_id(C->atoms,
1827 parsed_func.header.
1828 a_name));
1829 slang_function_destruct(&parsed_func);
1830 return 0;
1831 }
1832
1833 /* destroy the existing function declaration and replace it
1834 * with the new one, remember to save the fixup table
1835 */
1836 parsed_func.fixups = found_func->fixups;
1837 slang_fixup_table_init(&found_func->fixups);
1838 slang_function_destruct(found_func);
1839 *found_func = parsed_func;
1840 }
1841 else {
1842 /* another declaration of the same function prototype - ignore it */
1843 slang_function_destruct(&parsed_func);
1844 }
1845
1846 /* return the found function */
1847 *parsed_func_ret = found_func;
1848 }
1849
1850 /* assemble the parsed function */
1851 {
1852 slang_assemble_ctx A;
1853
1854 A.file = O->assembly;
1855 A.mach = O->machine;
1856 A.atoms = C->atoms;
1857 A.space.funcs = O->funs;
1858 A.space.structs = O->structs;
1859 A.space.vars = O->vars;
1860 if (!_slang_assemble_function(&A, *parsed_func_ret))
1861 return 0;
1862 }
1863 return 1;
1864 }
1865
1866 /* declaration */
1867 #define DECLARATION_FUNCTION_PROTOTYPE 1
1868 #define DECLARATION_INIT_DECLARATOR_LIST 2
1869
1870 static int
1871 parse_declaration(slang_parse_ctx * C, slang_output_ctx * O)
1872 {
1873 switch (*C->I++) {
1874 case DECLARATION_INIT_DECLARATOR_LIST:
1875 if (!parse_init_declarator_list(C, O))
1876 return 0;
1877 break;
1878 case DECLARATION_FUNCTION_PROTOTYPE:
1879 {
1880 slang_function *dummy_func;
1881
1882 if (!parse_function(C, O, 0, &dummy_func))
1883 return 0;
1884 }
1885 break;
1886 default:
1887 return 0;
1888 }
1889 return 1;
1890 }
1891
1892 /* external declaration */
1893 #define EXTERNAL_NULL 0
1894 #define EXTERNAL_FUNCTION_DEFINITION 1
1895 #define EXTERNAL_DECLARATION 2
1896
1897 static GLboolean
1898 parse_code_unit(slang_parse_ctx * C, slang_code_unit * unit)
1899 {
1900 slang_output_ctx o;
1901
1902 /* setup output context */
1903 o.funs = &unit->funs;
1904 o.structs = &unit->structs;
1905 o.vars = &unit->vars;
1906 o.assembly = &unit->object->assembly;
1907 o.global_pool = &unit->object->varpool;
1908 o.machine = &unit->object->machine;
1909
1910 /* parse individual functions and declarations */
1911 while (*C->I != EXTERNAL_NULL) {
1912 switch (*C->I++) {
1913 case EXTERNAL_FUNCTION_DEFINITION:
1914 {
1915 slang_function *func;
1916
1917 if (!parse_function(C, &o, 1, &func))
1918 return 0;
1919 }
1920 break;
1921 case EXTERNAL_DECLARATION:
1922 if (!parse_declaration(C, &o))
1923 return 0;
1924 break;
1925 default:
1926 return 0;
1927 }
1928 }
1929 C->I++;
1930 return 1;
1931 }
1932
1933 static GLboolean
1934 compile_binary(const byte * prod, slang_code_unit * unit,
1935 slang_unit_type type, slang_info_log * infolog,
1936 slang_code_unit * builtin, slang_code_unit * downlink)
1937 {
1938 slang_parse_ctx C;
1939
1940 unit->type = type;
1941
1942 /* setup parse context */
1943 C.I = prod;
1944 C.L = infolog;
1945 C.parsing_builtin = (builtin == NULL);
1946 C.global_scope = GL_TRUE;
1947 C.atoms = &unit->object->atompool;
1948
1949 if (!check_revision(&C))
1950 return GL_FALSE;
1951
1952 if (downlink != NULL) {
1953 unit->vars.outer_scope = &downlink->vars;
1954 unit->funs.outer_scope = &downlink->funs;
1955 unit->structs.outer_scope = &downlink->structs;
1956 }
1957
1958 /* parse translation unit */
1959 return parse_code_unit(&C, unit);
1960 }
1961
1962 static GLboolean
1963 compile_with_grammar(grammar id, const char *source, slang_code_unit * unit,
1964 slang_unit_type type, slang_info_log * infolog,
1965 slang_code_unit * builtin)
1966 {
1967 byte *prod;
1968 GLuint size, start, version;
1969 slang_string preprocessed;
1970
1971 /* First retrieve the version number. */
1972 if (!_slang_preprocess_version(source, &version, &start, infolog))
1973 return GL_FALSE;
1974
1975 if (version > 110) {
1976 slang_info_log_error(infolog,
1977 "language version specified is not supported.");
1978 return GL_FALSE;
1979 }
1980
1981 /* Now preprocess the source string. */
1982 slang_string_init(&preprocessed);
1983 if (!_slang_preprocess_directives(&preprocessed, &source[start], infolog)) {
1984 slang_string_free(&preprocessed);
1985 slang_info_log_error(infolog, "failed to preprocess the source.");
1986 return GL_FALSE;
1987 }
1988
1989 /* Finally check the syntax and generate its binary representation. */
1990 if (!grammar_fast_check
1991 (id, (const byte *) (slang_string_cstr(&preprocessed)), &prod, &size,
1992 65536)) {
1993 char buf[1024];
1994 GLint pos;
1995
1996 slang_string_free(&preprocessed);
1997 grammar_get_last_error((byte *) (buf), sizeof(buf), &pos);
1998 slang_info_log_error(infolog, buf);
1999 return GL_FALSE;
2000 }
2001 slang_string_free(&preprocessed);
2002
2003 /* Syntax is okay - translate it to internal representation. */
2004 if (!compile_binary
2005 (prod, unit, type, infolog, builtin,
2006 &builtin[SLANG_BUILTIN_TOTAL - 1])) {
2007 grammar_alloc_free(prod);
2008 return GL_FALSE;
2009 }
2010 grammar_alloc_free(prod);
2011 return GL_TRUE;
2012 }
2013
2014 LONGSTRING static const char *slang_shader_syn =
2015 #include "library/slang_shader_syn.h"
2016 ;
2017
2018 static const byte slang_core_gc[] = {
2019 #include "library/slang_core_gc.h"
2020 };
2021
2022 static const byte slang_common_builtin_gc[] = {
2023 #include "library/slang_common_builtin_gc.h"
2024 };
2025
2026 static const byte slang_fragment_builtin_gc[] = {
2027 #include "library/slang_fragment_builtin_gc.h"
2028 };
2029
2030 static const byte slang_vertex_builtin_gc[] = {
2031 #include "library/slang_vertex_builtin_gc.h"
2032 };
2033
2034 #if defined(USE_X86_ASM) || defined(SLANG_X86)
2035 static const byte slang_builtin_vec4_gc[] = {
2036 #include "library/slang_builtin_vec4_gc.h"
2037 };
2038 #endif
2039
2040 static GLboolean
2041 compile_object(grammar * id, const char *source, slang_code_object * object,
2042 slang_unit_type type, slang_info_log * infolog)
2043 {
2044 slang_code_unit *builtins = NULL;
2045
2046 /* load GLSL grammar */
2047 *id = grammar_load_from_text((const byte *) (slang_shader_syn));
2048 if (*id == 0) {
2049 byte buf[1024];
2050 int pos;
2051
2052 grammar_get_last_error(buf, 1024, &pos);
2053 slang_info_log_error(infolog, (const char *) (buf));
2054 return GL_FALSE;
2055 }
2056
2057 /* set shader type - the syntax is slightly different for different shaders */
2058 if (type == slang_unit_fragment_shader
2059 || type == slang_unit_fragment_builtin)
2060 grammar_set_reg8(*id, (const byte *) "shader_type", 1);
2061 else
2062 grammar_set_reg8(*id, (const byte *) "shader_type", 2);
2063
2064 /* enable language extensions */
2065 grammar_set_reg8(*id, (const byte *) "parsing_builtin", 1);
2066
2067 /* if parsing user-specified shader, load built-in library */
2068 if (type == slang_unit_fragment_shader || type == slang_unit_vertex_shader) {
2069 /* compile core functionality first */
2070 if (!compile_binary(slang_core_gc, &object->builtin[SLANG_BUILTIN_CORE],
2071 slang_unit_fragment_builtin, infolog, NULL, NULL))
2072 return GL_FALSE;
2073
2074 /* compile common functions and variables, link to core */
2075 if (!compile_binary
2076 (slang_common_builtin_gc, &object->builtin[SLANG_BUILTIN_COMMON],
2077 slang_unit_fragment_builtin, infolog, NULL,
2078 &object->builtin[SLANG_BUILTIN_CORE]))
2079 return GL_FALSE;
2080
2081 /* compile target-specific functions and variables, link to common */
2082 if (type == slang_unit_fragment_shader) {
2083 if (!compile_binary
2084 (slang_fragment_builtin_gc,
2085 &object->builtin[SLANG_BUILTIN_TARGET],
2086 slang_unit_fragment_builtin, infolog, NULL,
2087 &object->builtin[SLANG_BUILTIN_COMMON]))
2088 return GL_FALSE;
2089 }
2090 else if (type == slang_unit_vertex_shader) {
2091 if (!compile_binary
2092 (slang_vertex_builtin_gc, &object->builtin[SLANG_BUILTIN_TARGET],
2093 slang_unit_vertex_builtin, infolog, NULL,
2094 &object->builtin[SLANG_BUILTIN_COMMON]))
2095 return GL_FALSE;
2096 }
2097
2098 #if defined(USE_X86_ASM) || defined(SLANG_X86)
2099 /* compile x86 4-component vector overrides, link to target */
2100 if (!compile_binary
2101 (slang_builtin_vec4_gc, &object->builtin[SLANG_BUILTIN_VEC4],
2102 slang_unit_fragment_builtin, infolog, NULL,
2103 &object->builtin[SLANG_BUILTIN_TARGET]))
2104 return GL_FALSE;
2105 #endif
2106
2107 /* disable language extensions */
2108 grammar_set_reg8(*id, (const byte *) "parsing_builtin", 0);
2109 builtins = object->builtin;
2110 }
2111
2112 /* compile the actual shader - pass-in built-in library for external shader */
2113 return compile_with_grammar(*id, source, &object->unit, type, infolog,
2114 builtins);
2115 }
2116
2117 GLboolean
2118 _slang_compile(const char *source, slang_code_object * object,
2119 slang_unit_type type, slang_info_log * infolog)
2120 {
2121 GLboolean success;
2122 grammar id = 0;
2123
2124 _slang_code_object_dtr(object);
2125 _slang_code_object_ctr(object);
2126
2127 success = compile_object(&id, source, object, type, infolog);
2128 if (id != 0)
2129 grammar_destroy(id);
2130 if (!success)
2131 return GL_FALSE;
2132
2133 if (!_slang_build_export_data_table(&object->expdata, &object->unit.vars))
2134 return GL_FALSE;
2135 if (!_slang_build_export_code_table
2136 (&object->expcode, &object->unit.funs, &object->unit))
2137 return GL_FALSE;
2138
2139 #if defined(USE_X86_ASM) || defined(SLANG_X86)
2140 /* XXX: lookup the @main label */
2141 if (!_slang_x86_codegen
2142 (&object->machine, &object->assembly,
2143 object->expcode.entries[0].address))
2144 return GL_FALSE;
2145 #endif
2146
2147 return GL_TRUE;
2148 }