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Add GLSL preprocessor.
[mesa.git] / src / mesa / shader / slang / slang_compile.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 6.6
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 compiler.
39 * Lots of error-checking functionality is missing but every well-formed shader source should
40 * compile successfully and execute as expected. However, some semantically ill-formed shaders
41 * may be accepted resulting in undefined behaviour.
42 */
43
44 /* slang_var_pool */
45
46 static GLuint slang_var_pool_alloc (slang_var_pool *pool, unsigned int size)
47 {
48 GLuint addr;
49
50 addr = pool->next_addr;
51 pool->next_addr += size;
52 return addr;
53 }
54
55 /*
56 * slang_code_unit
57 */
58
59 GLvoid
60 _slang_code_unit_ctr (slang_code_unit *self, struct slang_code_object_ *object)
61 {
62 _slang_variable_scope_ctr (&self->vars);
63 _slang_function_scope_ctr (&self->funs);
64 _slang_struct_scope_ctr (&self->structs);
65 self->object = object;
66 }
67
68 GLvoid
69 _slang_code_unit_dtr (slang_code_unit *self)
70 {
71 slang_variable_scope_destruct (&self->vars);
72 slang_function_scope_destruct (&self->funs);
73 slang_struct_scope_destruct (&self->structs);
74 }
75
76 /*
77 * slang_code_object
78 */
79
80 GLvoid
81 _slang_code_object_ctr (slang_code_object *self)
82 {
83 GLuint i;
84
85 for (i = 0; i < SLANG_BUILTIN_TOTAL; i++)
86 _slang_code_unit_ctr (&self->builtin[i], self);
87 _slang_code_unit_ctr (&self->unit, self);
88 _slang_assembly_file_ctr (&self->assembly);
89 slang_machine_ctr (&self->machine);
90 self->varpool.next_addr = 0;
91 slang_atom_pool_construct (&self->atompool);
92 slang_export_data_table_ctr (&self->expdata);
93 self->expdata.atoms = &self->atompool;
94 slang_export_code_table_ctr (&self->expcode);
95 self->expcode.atoms = &self->atompool;
96 }
97
98 GLvoid
99 _slang_code_object_dtr (slang_code_object *self)
100 {
101 GLuint i;
102
103 for (i = 0; i < SLANG_BUILTIN_TOTAL; i++)
104 _slang_code_unit_dtr (&self->builtin[i]);
105 _slang_code_unit_dtr (&self->unit);
106 slang_assembly_file_destruct (&self->assembly);
107 slang_machine_dtr (&self->machine);
108 slang_atom_pool_destruct (&self->atompool);
109 slang_export_data_table_dtr (&self->expdata);
110 slang_export_code_table_ctr (&self->expcode);
111 }
112
113 /* slang_info_log */
114
115 static char *out_of_memory = "Error: Out of memory.\n";
116
117 void slang_info_log_construct (slang_info_log *log)
118 {
119 log->text = NULL;
120 log->dont_free_text = 0;
121 }
122
123 void slang_info_log_destruct (slang_info_log *log)
124 {
125 if (!log->dont_free_text)
126 slang_alloc_free (log->text);
127 }
128
129 static int slang_info_log_message (slang_info_log *log, const char *prefix, const char *msg)
130 {
131 GLuint size;
132
133 if (log->dont_free_text)
134 return 0;
135 size = slang_string_length (msg) + 2;
136 if (prefix != NULL)
137 size += slang_string_length (prefix) + 2;
138 if (log->text != NULL) {
139 GLuint old_len = slang_string_length (log->text);
140 log->text = (char *) (slang_alloc_realloc (log->text, old_len + 1, old_len + size));
141 }
142 else {
143 log->text = (char *) (slang_alloc_malloc (size));
144 if (log->text != NULL)
145 log->text[0] = '\0';
146 }
147 if (log->text == NULL)
148 return 0;
149 if (prefix != NULL) {
150 slang_string_concat (log->text, prefix);
151 slang_string_concat (log->text, ": ");
152 }
153 slang_string_concat (log->text, msg);
154 slang_string_concat (log->text, "\n");
155 return 1;
156 }
157
158 int slang_info_log_print (slang_info_log *log, const char *msg, ...)
159 {
160 va_list va;
161 char buf[1024];
162
163 va_start (va, msg);
164 _mesa_vsprintf (buf, msg, va);
165 va_end (va);
166 return slang_info_log_message (log, NULL, buf);
167 }
168
169 int slang_info_log_error (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 if (slang_info_log_message (log, "Error", buf))
178 return 1;
179 slang_info_log_memory (log);
180 return 0;
181 }
182
183 int slang_info_log_warning (slang_info_log *log, const char *msg, ...)
184 {
185 va_list va;
186 char buf[1024];
187
188 va_start (va, msg);
189 _mesa_vsprintf (buf, msg, va);
190 va_end (va);
191 if (slang_info_log_message (log, "Warning", buf))
192 return 1;
193 slang_info_log_memory (log);
194 return 0;
195 }
196
197 void slang_info_log_memory (slang_info_log *log)
198 {
199 if (!slang_info_log_message (log, "Error", "Out of memory."))
200 {
201 log->dont_free_text = 1;
202 log->text = out_of_memory;
203 }
204 }
205
206 /* slang_parse_ctx */
207
208 typedef struct slang_parse_ctx_
209 {
210 const byte *I;
211 slang_info_log *L;
212 int parsing_builtin;
213 int global_scope;
214 slang_atom_pool *atoms;
215 } slang_parse_ctx;
216
217 /* slang_output_ctx */
218
219 typedef struct slang_output_ctx_
220 {
221 slang_variable_scope *vars;
222 slang_function_scope *funs;
223 slang_struct_scope *structs;
224 slang_assembly_file *assembly;
225 slang_var_pool *global_pool;
226 slang_machine *machine;
227 } slang_output_ctx;
228
229 /* _slang_compile() */
230
231 static void parse_identifier_str (slang_parse_ctx *C, char **id)
232 {
233 *id = (char *) C->I;
234 C->I += _mesa_strlen (*id) + 1;
235 }
236
237 static slang_atom parse_identifier (slang_parse_ctx *C)
238 {
239 const char *id;
240
241 id = (const char *) C->I;
242 C->I += _mesa_strlen (id) + 1;
243 return slang_atom_pool_atom (C->atoms, id);
244 }
245
246 static int parse_number (slang_parse_ctx *C, int *number)
247 {
248 const int radix = (int) (*C->I++);
249 *number = 0;
250 while (*C->I != '\0')
251 {
252 int digit;
253 if (*C->I >= '0' && *C->I <= '9')
254 digit = (int) (*C->I - '0');
255 else if (*C->I >= 'A' && *C->I <= 'Z')
256 digit = (int) (*C->I - 'A') + 10;
257 else
258 digit = (int) (*C->I - 'a') + 10;
259 *number = *number * radix + digit;
260 C->I++;
261 }
262 C->I++;
263 if (*number > 65535)
264 slang_info_log_warning (C->L, "%d: literal integer overflow.", *number);
265 return 1;
266 }
267
268 static int parse_float (slang_parse_ctx *C, float *number)
269 {
270 char *integral = NULL;
271 char *fractional = NULL;
272 char *exponent = NULL;
273 char *whole = NULL;
274
275 parse_identifier_str (C, &integral);
276 parse_identifier_str (C, &fractional);
277 parse_identifier_str (C, &exponent);
278
279 whole = (char *) (slang_alloc_malloc ((_mesa_strlen (integral) + _mesa_strlen (fractional) +
280 _mesa_strlen (exponent) + 3) * sizeof (char)));
281 if (whole == NULL)
282 {
283 slang_info_log_memory (C->L);
284 return 0;
285 }
286
287 slang_string_copy (whole, integral);
288 slang_string_concat (whole, ".");
289 slang_string_concat (whole, fractional);
290 slang_string_concat (whole, "E");
291 slang_string_concat (whole, exponent);
292
293 *number = (float) (_mesa_strtod(whole, (char **)NULL));
294
295 slang_alloc_free (whole);
296 return 1;
297 }
298
299 /* revision number - increment after each change affecting emitted output */
300 #define REVISION 3
301
302 static int check_revision (slang_parse_ctx *C)
303 {
304 if (*C->I != REVISION)
305 {
306 slang_info_log_error (C->L, "Internal compiler error.");
307 return 0;
308 }
309 C->I++;
310 return 1;
311 }
312
313 static int parse_statement (slang_parse_ctx *, slang_output_ctx *, slang_operation *);
314 static int parse_expression (slang_parse_ctx *, slang_output_ctx *, slang_operation *);
315 static int parse_type_specifier (slang_parse_ctx *, slang_output_ctx *, slang_type_specifier *);
316
317 static GLboolean parse_array_len (slang_parse_ctx *C, slang_output_ctx *O, GLuint *len)
318 {
319 slang_operation array_size;
320 slang_assembly_name_space space;
321 GLboolean result;
322
323 if (!slang_operation_construct (&array_size))
324 return GL_FALSE;
325 if (!parse_expression (C, O, &array_size))
326 {
327 slang_operation_destruct (&array_size);
328 return GL_FALSE;
329 }
330
331 space.funcs = O->funs;
332 space.structs = O->structs;
333 space.vars = O->vars;
334 result = _slang_evaluate_int (O->assembly, O->machine, &space, &array_size, len, C->atoms);
335 slang_operation_destruct (&array_size);
336 return result;
337 }
338
339 static GLboolean calculate_var_size (slang_parse_ctx *C, slang_output_ctx *O, slang_variable *var)
340 {
341 slang_storage_aggregate agg;
342
343 if (!slang_storage_aggregate_construct (&agg))
344 return GL_FALSE;
345 if (!_slang_aggregate_variable (&agg, &var->type.specifier, var->array_len, O->funs, O->structs,
346 O->vars, O->machine, O->assembly, C->atoms))
347 {
348 slang_storage_aggregate_destruct (&agg);
349 return GL_FALSE;
350 }
351 var->size = _slang_sizeof_aggregate (&agg);
352 slang_storage_aggregate_destruct (&agg);
353 return GL_TRUE;
354 }
355
356 static GLboolean convert_to_array (slang_parse_ctx *C, slang_variable *var,
357 const slang_type_specifier *sp)
358 {
359 /* sized array - mark it as array, copy the specifier to the array element and
360 * parse the expression */
361 var->type.specifier.type = slang_spec_array;
362 var->type.specifier._array = (slang_type_specifier *) slang_alloc_malloc (sizeof (
363 slang_type_specifier));
364 if (var->type.specifier._array == NULL)
365 {
366 slang_info_log_memory (C->L);
367 return GL_FALSE;
368 }
369 slang_type_specifier_ctr (var->type.specifier._array);
370 return slang_type_specifier_copy (var->type.specifier._array, sp);
371 }
372
373 /* structure field */
374 #define FIELD_NONE 0
375 #define FIELD_NEXT 1
376 #define FIELD_ARRAY 2
377
378 static GLboolean parse_struct_field_var (slang_parse_ctx *C, slang_output_ctx *O, slang_variable *var,
379 const slang_type_specifier *sp)
380 {
381 var->a_name = parse_identifier (C);
382 if (var->a_name == SLANG_ATOM_NULL)
383 return GL_FALSE;
384
385 switch (*C->I++)
386 {
387 case FIELD_NONE:
388 if (!slang_type_specifier_copy (&var->type.specifier, sp))
389 return GL_FALSE;
390 break;
391 case FIELD_ARRAY:
392 if (!convert_to_array (C, var, sp))
393 return GL_FALSE;
394 if (!parse_array_len (C, O, &var->array_len))
395 return GL_FALSE;
396 break;
397 default:
398 return GL_FALSE;
399 }
400
401 return calculate_var_size (C, O, var);
402 }
403
404 static int parse_struct_field (slang_parse_ctx *C, slang_output_ctx *O, slang_struct *st,
405 slang_type_specifier *sp)
406 {
407 slang_output_ctx o = *O;
408
409 o.structs = st->structs;
410 if (!parse_type_specifier (C, &o, sp))
411 return 0;
412 do
413 {
414 slang_variable *var;
415
416 st->fields->variables = (slang_variable *) slang_alloc_realloc (st->fields->variables,
417 st->fields->num_variables * sizeof (slang_variable),
418 (st->fields->num_variables + 1) * sizeof (slang_variable));
419 if (st->fields->variables == NULL)
420 {
421 slang_info_log_memory (C->L);
422 return 0;
423 }
424 var = &st->fields->variables[st->fields->num_variables];
425 if (!slang_variable_construct (var))
426 return 0;
427 st->fields->num_variables++;
428 if (!parse_struct_field_var (C, &o, var, sp))
429 return 0;
430 }
431 while (*C->I++ != FIELD_NONE);
432
433 return 1;
434 }
435
436 static int parse_struct (slang_parse_ctx *C, slang_output_ctx *O, slang_struct **st)
437 {
438 slang_atom a_name;
439 const char *name;
440
441 /* parse struct name (if any) and make sure it is unique in current scope */
442 a_name = parse_identifier (C);
443 if (a_name == SLANG_ATOM_NULL)
444 return 0;
445 name = slang_atom_pool_id (C->atoms, a_name);
446 if (name[0] != '\0' && slang_struct_scope_find (O->structs, a_name, 0) != NULL)
447 {
448 slang_info_log_error (C->L, "%s: duplicate type name.", name);
449 return 0;
450 }
451
452 /* set-up a new struct */
453 *st = (slang_struct *) slang_alloc_malloc (sizeof (slang_struct));
454 if (*st == NULL)
455 {
456 slang_info_log_memory (C->L);
457 return 0;
458 }
459 if (!slang_struct_construct (*st))
460 {
461 slang_alloc_free (*st);
462 *st = NULL;
463 slang_info_log_memory (C->L);
464 return 0;
465 }
466 (**st).a_name = a_name;
467 (**st).structs->outer_scope = O->structs;
468
469 /* parse individual struct fields */
470 do
471 {
472 slang_type_specifier sp;
473
474 slang_type_specifier_ctr (&sp);
475 if (!parse_struct_field (C, O, *st, &sp))
476 {
477 slang_type_specifier_dtr (&sp);
478 return 0;
479 }
480 slang_type_specifier_dtr (&sp);
481 }
482 while (*C->I++ != FIELD_NONE);
483
484 /* if named struct, copy it to current scope */
485 if (name[0] != '\0')
486 {
487 slang_struct *s;
488
489 O->structs->structs = (slang_struct *) slang_alloc_realloc (O->structs->structs,
490 O->structs->num_structs * sizeof (slang_struct),
491 (O->structs->num_structs + 1) * sizeof (slang_struct));
492 if (O->structs->structs == NULL)
493 {
494 slang_info_log_memory (C->L);
495 return 0;
496 }
497 s = &O->structs->structs[O->structs->num_structs];
498 if (!slang_struct_construct (s))
499 return 0;
500 O->structs->num_structs++;
501 if (!slang_struct_copy (s, *st))
502 return 0;
503 }
504
505 return 1;
506 }
507
508 /* type qualifier */
509 #define TYPE_QUALIFIER_NONE 0
510 #define TYPE_QUALIFIER_CONST 1
511 #define TYPE_QUALIFIER_ATTRIBUTE 2
512 #define TYPE_QUALIFIER_VARYING 3
513 #define TYPE_QUALIFIER_UNIFORM 4
514 #define TYPE_QUALIFIER_FIXEDOUTPUT 5
515 #define TYPE_QUALIFIER_FIXEDINPUT 6
516
517 static int parse_type_qualifier (slang_parse_ctx *C, slang_type_qualifier *qual)
518 {
519 switch (*C->I++)
520 {
521 case TYPE_QUALIFIER_NONE:
522 *qual = slang_qual_none;
523 break;
524 case TYPE_QUALIFIER_CONST:
525 *qual = slang_qual_const;
526 break;
527 case TYPE_QUALIFIER_ATTRIBUTE:
528 *qual = slang_qual_attribute;
529 break;
530 case TYPE_QUALIFIER_VARYING:
531 *qual = slang_qual_varying;
532 break;
533 case TYPE_QUALIFIER_UNIFORM:
534 *qual = slang_qual_uniform;
535 break;
536 case TYPE_QUALIFIER_FIXEDOUTPUT:
537 *qual = slang_qual_fixedoutput;
538 break;
539 case TYPE_QUALIFIER_FIXEDINPUT:
540 *qual = slang_qual_fixedinput;
541 break;
542 default:
543 return 0;
544 }
545 return 1;
546 }
547
548 /* type specifier */
549 #define TYPE_SPECIFIER_VOID 0
550 #define TYPE_SPECIFIER_BOOL 1
551 #define TYPE_SPECIFIER_BVEC2 2
552 #define TYPE_SPECIFIER_BVEC3 3
553 #define TYPE_SPECIFIER_BVEC4 4
554 #define TYPE_SPECIFIER_INT 5
555 #define TYPE_SPECIFIER_IVEC2 6
556 #define TYPE_SPECIFIER_IVEC3 7
557 #define TYPE_SPECIFIER_IVEC4 8
558 #define TYPE_SPECIFIER_FLOAT 9
559 #define TYPE_SPECIFIER_VEC2 10
560 #define TYPE_SPECIFIER_VEC3 11
561 #define TYPE_SPECIFIER_VEC4 12
562 #define TYPE_SPECIFIER_MAT2 13
563 #define TYPE_SPECIFIER_MAT3 14
564 #define TYPE_SPECIFIER_MAT4 15
565 #define TYPE_SPECIFIER_SAMPLER1D 16
566 #define TYPE_SPECIFIER_SAMPLER2D 17
567 #define TYPE_SPECIFIER_SAMPLER3D 18
568 #define TYPE_SPECIFIER_SAMPLERCUBE 19
569 #define TYPE_SPECIFIER_SAMPLER1DSHADOW 20
570 #define TYPE_SPECIFIER_SAMPLER2DSHADOW 21
571 #define TYPE_SPECIFIER_STRUCT 22
572 #define TYPE_SPECIFIER_TYPENAME 23
573
574 static int parse_type_specifier (slang_parse_ctx *C, slang_output_ctx *O, slang_type_specifier *spec)
575 {
576 switch (*C->I++)
577 {
578 case TYPE_SPECIFIER_VOID:
579 spec->type = slang_spec_void;
580 break;
581 case TYPE_SPECIFIER_BOOL:
582 spec->type = slang_spec_bool;
583 break;
584 case TYPE_SPECIFIER_BVEC2:
585 spec->type = slang_spec_bvec2;
586 break;
587 case TYPE_SPECIFIER_BVEC3:
588 spec->type = slang_spec_bvec3;
589 break;
590 case TYPE_SPECIFIER_BVEC4:
591 spec->type = slang_spec_bvec4;
592 break;
593 case TYPE_SPECIFIER_INT:
594 spec->type = slang_spec_int;
595 break;
596 case TYPE_SPECIFIER_IVEC2:
597 spec->type = slang_spec_ivec2;
598 break;
599 case TYPE_SPECIFIER_IVEC3:
600 spec->type = slang_spec_ivec3;
601 break;
602 case TYPE_SPECIFIER_IVEC4:
603 spec->type = slang_spec_ivec4;
604 break;
605 case TYPE_SPECIFIER_FLOAT:
606 spec->type = slang_spec_float;
607 break;
608 case TYPE_SPECIFIER_VEC2:
609 spec->type = slang_spec_vec2;
610 break;
611 case TYPE_SPECIFIER_VEC3:
612 spec->type = slang_spec_vec3;
613 break;
614 case TYPE_SPECIFIER_VEC4:
615 spec->type = slang_spec_vec4;
616 break;
617 case TYPE_SPECIFIER_MAT2:
618 spec->type = slang_spec_mat2;
619 break;
620 case TYPE_SPECIFIER_MAT3:
621 spec->type = slang_spec_mat3;
622 break;
623 case TYPE_SPECIFIER_MAT4:
624 spec->type = slang_spec_mat4;
625 break;
626 case TYPE_SPECIFIER_SAMPLER1D:
627 spec->type = slang_spec_sampler1D;
628 break;
629 case TYPE_SPECIFIER_SAMPLER2D:
630 spec->type = slang_spec_sampler2D;
631 break;
632 case TYPE_SPECIFIER_SAMPLER3D:
633 spec->type = slang_spec_sampler3D;
634 break;
635 case TYPE_SPECIFIER_SAMPLERCUBE:
636 spec->type = slang_spec_samplerCube;
637 break;
638 case TYPE_SPECIFIER_SAMPLER1DSHADOW:
639 spec->type = slang_spec_sampler1DShadow;
640 break;
641 case TYPE_SPECIFIER_SAMPLER2DSHADOW:
642 spec->type = slang_spec_sampler2DShadow;
643 break;
644 case TYPE_SPECIFIER_STRUCT:
645 spec->type = slang_spec_struct;
646 if (!parse_struct (C, O, &spec->_struct))
647 return 0;
648 break;
649 case TYPE_SPECIFIER_TYPENAME:
650 spec->type = slang_spec_struct;
651 {
652 slang_atom a_name;
653 slang_struct *stru;
654
655 a_name = parse_identifier (C);
656 if (a_name == NULL)
657 return 0;
658
659 stru = slang_struct_scope_find (O->structs, a_name, 1);
660 if (stru == NULL)
661 {
662 slang_info_log_error (C->L, "%s: undeclared type name.",
663 slang_atom_pool_id (C->atoms, a_name));
664 return 0;
665 }
666
667 spec->_struct = (slang_struct *) slang_alloc_malloc (sizeof (slang_struct));
668 if (spec->_struct == NULL)
669 {
670 slang_info_log_memory (C->L);
671 return 0;
672 }
673 if (!slang_struct_construct (spec->_struct))
674 {
675 slang_alloc_free (spec->_struct);
676 spec->_struct = NULL;
677 return 0;
678 }
679 if (!slang_struct_copy (spec->_struct, stru))
680 return 0;
681 }
682 break;
683 default:
684 return 0;
685 }
686 return 1;
687 }
688
689 static int parse_fully_specified_type (slang_parse_ctx *C, slang_output_ctx *O,
690 slang_fully_specified_type *type)
691 {
692 if (!parse_type_qualifier (C, &type->qualifier))
693 return 0;
694 return parse_type_specifier (C, O, &type->specifier);
695 }
696
697 /* operation */
698 #define OP_END 0
699 #define OP_BLOCK_BEGIN_NO_NEW_SCOPE 1
700 #define OP_BLOCK_BEGIN_NEW_SCOPE 2
701 #define OP_DECLARE 3
702 #define OP_ASM 4
703 #define OP_BREAK 5
704 #define OP_CONTINUE 6
705 #define OP_DISCARD 7
706 #define OP_RETURN 8
707 #define OP_EXPRESSION 9
708 #define OP_IF 10
709 #define OP_WHILE 11
710 #define OP_DO 12
711 #define OP_FOR 13
712 #define OP_PUSH_VOID 14
713 #define OP_PUSH_BOOL 15
714 #define OP_PUSH_INT 16
715 #define OP_PUSH_FLOAT 17
716 #define OP_PUSH_IDENTIFIER 18
717 #define OP_SEQUENCE 19
718 #define OP_ASSIGN 20
719 #define OP_ADDASSIGN 21
720 #define OP_SUBASSIGN 22
721 #define OP_MULASSIGN 23
722 #define OP_DIVASSIGN 24
723 /*#define OP_MODASSIGN 25*/
724 /*#define OP_LSHASSIGN 26*/
725 /*#define OP_RSHASSIGN 27*/
726 /*#define OP_ORASSIGN 28*/
727 /*#define OP_XORASSIGN 29*/
728 /*#define OP_ANDASSIGN 30*/
729 #define OP_SELECT 31
730 #define OP_LOGICALOR 32
731 #define OP_LOGICALXOR 33
732 #define OP_LOGICALAND 34
733 /*#define OP_BITOR 35*/
734 /*#define OP_BITXOR 36*/
735 /*#define OP_BITAND 37*/
736 #define OP_EQUAL 38
737 #define OP_NOTEQUAL 39
738 #define OP_LESS 40
739 #define OP_GREATER 41
740 #define OP_LESSEQUAL 42
741 #define OP_GREATEREQUAL 43
742 /*#define OP_LSHIFT 44*/
743 /*#define OP_RSHIFT 45*/
744 #define OP_ADD 46
745 #define OP_SUBTRACT 47
746 #define OP_MULTIPLY 48
747 #define OP_DIVIDE 49
748 /*#define OP_MODULUS 50*/
749 #define OP_PREINCREMENT 51
750 #define OP_PREDECREMENT 52
751 #define OP_PLUS 53
752 #define OP_MINUS 54
753 /*#define OP_COMPLEMENT 55*/
754 #define OP_NOT 56
755 #define OP_SUBSCRIPT 57
756 #define OP_CALL 58
757 #define OP_FIELD 59
758 #define OP_POSTINCREMENT 60
759 #define OP_POSTDECREMENT 61
760
761 static int parse_child_operation (slang_parse_ctx *C, slang_output_ctx *O, slang_operation *oper,
762 int statement)
763 {
764 slang_operation *ch;
765
766 oper->children = (slang_operation *) slang_alloc_realloc (oper->children,
767 oper->num_children * sizeof (slang_operation),
768 (oper->num_children + 1) * sizeof (slang_operation));
769 if (oper->children == NULL)
770 {
771 slang_info_log_memory (C->L);
772 return 0;
773 }
774 ch = &oper->children[oper->num_children];
775 if (!slang_operation_construct (ch))
776 {
777 slang_info_log_memory (C->L);
778 return 0;
779 }
780 oper->num_children++;
781 if (statement)
782 return parse_statement (C, O, ch);
783 return parse_expression (C, O, ch);
784 }
785
786 static int parse_declaration (slang_parse_ctx *C, slang_output_ctx *O);
787
788 static int parse_statement (slang_parse_ctx *C, slang_output_ctx *O, slang_operation *oper)
789 {
790 oper->locals->outer_scope = O->vars;
791 switch (*C->I++)
792 {
793 case OP_BLOCK_BEGIN_NO_NEW_SCOPE:
794 /* parse child statements, do not create new variable scope */
795 oper->type = slang_oper_block_no_new_scope;
796 while (*C->I != OP_END)
797 if (!parse_child_operation (C, O, oper, 1))
798 return 0;
799 C->I++;
800 break;
801 case OP_BLOCK_BEGIN_NEW_SCOPE:
802 /* parse child statements, create new variable scope */
803 {
804 slang_output_ctx o = *O;
805
806 oper->type = slang_oper_block_new_scope;
807 o.vars = oper->locals;
808 while (*C->I != OP_END)
809 if (!parse_child_operation (C, &o, oper, 1))
810 return 0;
811 C->I++;
812 }
813 break;
814 case OP_DECLARE:
815 /* local variable declaration, individual declarators are stored as children identifiers */
816 oper->type = slang_oper_variable_decl;
817 {
818 const unsigned int first_var = O->vars->num_variables;
819
820 /* parse the declaration, note that there can be zero or more than one declarators */
821 if (!parse_declaration (C, O))
822 return 0;
823 if (first_var < O->vars->num_variables)
824 {
825 const unsigned int num_vars = O->vars->num_variables - first_var;
826 unsigned int i;
827
828 oper->children = (slang_operation *) slang_alloc_malloc (num_vars * sizeof (
829 slang_operation));
830 if (oper->children == NULL)
831 {
832 slang_info_log_memory (C->L);
833 return 0;
834 }
835 for (oper->num_children = 0; oper->num_children < num_vars; oper->num_children++)
836 if (!slang_operation_construct (&oper->children[oper->num_children]))
837 {
838 slang_info_log_memory (C->L);
839 return 0;
840 }
841 for (i = first_var; i < O->vars->num_variables; i++)
842 {
843 slang_operation *o = &oper->children[i - first_var];
844
845 o->type = slang_oper_identifier;
846 o->locals->outer_scope = O->vars;
847 o->a_id = O->vars->variables[i].a_name;
848 }
849 }
850 }
851 break;
852 case OP_ASM:
853 /* the __asm statement, parse the mnemonic and all its arguments as expressions */
854 oper->type = slang_oper_asm;
855 oper->a_id = parse_identifier (C);
856 if (oper->a_id == SLANG_ATOM_NULL)
857 return 0;
858 while (*C->I != OP_END)
859 if (!parse_child_operation (C, O, oper, 0))
860 return 0;
861 C->I++;
862 break;
863 case OP_BREAK:
864 oper->type = slang_oper_break;
865 break;
866 case OP_CONTINUE:
867 oper->type = slang_oper_continue;
868 break;
869 case OP_DISCARD:
870 oper->type = slang_oper_discard;
871 break;
872 case OP_RETURN:
873 oper->type = slang_oper_return;
874 if (!parse_child_operation (C, O, oper, 0))
875 return 0;
876 break;
877 case OP_EXPRESSION:
878 oper->type = slang_oper_expression;
879 if (!parse_child_operation (C, O, oper, 0))
880 return 0;
881 break;
882 case OP_IF:
883 oper->type = slang_oper_if;
884 if (!parse_child_operation (C, O, oper, 0))
885 return 0;
886 if (!parse_child_operation (C, O, oper, 1))
887 return 0;
888 if (!parse_child_operation (C, O, oper, 1))
889 return 0;
890 break;
891 case OP_WHILE:
892 {
893 slang_output_ctx o = *O;
894
895 oper->type = slang_oper_while;
896 o.vars = oper->locals;
897 if (!parse_child_operation (C, &o, oper, 1))
898 return 0;
899 if (!parse_child_operation (C, &o, oper, 1))
900 return 0;
901 }
902 break;
903 case OP_DO:
904 oper->type = slang_oper_do;
905 if (!parse_child_operation (C, O, oper, 1))
906 return 0;
907 if (!parse_child_operation (C, O, oper, 0))
908 return 0;
909 break;
910 case OP_FOR:
911 {
912 slang_output_ctx o = *O;
913
914 oper->type = slang_oper_for;
915 o.vars = oper->locals;
916 if (!parse_child_operation (C, &o, oper, 1))
917 return 0;
918 if (!parse_child_operation (C, &o, oper, 1))
919 return 0;
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 }
925 break;
926 default:
927 return 0;
928 }
929 return 1;
930 }
931
932 static int handle_nary_expression (slang_parse_ctx *C, slang_operation *op, slang_operation **ops,
933 unsigned int *total_ops, unsigned int n)
934 {
935 unsigned int i;
936
937 op->children = (slang_operation *) slang_alloc_malloc (n * sizeof (slang_operation));
938 if (op->children == NULL)
939 {
940 slang_info_log_memory (C->L);
941 return 0;
942 }
943 op->num_children = n;
944
945 for (i = 0; i < n; i++)
946 op->children[i] = (*ops)[*total_ops - (n + 1 - i)];
947 (*ops)[*total_ops - (n + 1)] = (*ops)[*total_ops - 1];
948 *total_ops -= n;
949
950 *ops = (slang_operation *) slang_alloc_realloc (*ops, (*total_ops + n) * sizeof (slang_operation),
951 *total_ops * sizeof (slang_operation));
952 if (*ops == NULL)
953 {
954 slang_info_log_memory (C->L);
955 return 0;
956 }
957 return 1;
958 }
959
960 static int is_constructor_name (const char *name, slang_atom a_name, slang_struct_scope *structs)
961 {
962 if (slang_type_specifier_type_from_string (name) != slang_spec_void)
963 return 1;
964 return slang_struct_scope_find (structs, a_name, 1) != NULL;
965 }
966
967 static int parse_expression (slang_parse_ctx *C, slang_output_ctx *O, slang_operation *oper)
968 {
969 slang_operation *ops = NULL;
970 unsigned int num_ops = 0;
971 int number;
972
973 while (*C->I != OP_END)
974 {
975 slang_operation *op;
976 const unsigned int op_code = *C->I++;
977
978 /* allocate default operation, becomes a no-op if not used */
979 ops = (slang_operation *) slang_alloc_realloc (ops,
980 num_ops * sizeof (slang_operation), (num_ops + 1) * sizeof (slang_operation));
981 if (ops == NULL)
982 {
983 slang_info_log_memory (C->L);
984 return 0;
985 }
986 op = &ops[num_ops];
987 if (!slang_operation_construct (op))
988 {
989 slang_info_log_memory (C->L);
990 return 0;
991 }
992 num_ops++;
993 op->locals->outer_scope = O->vars;
994
995 switch (op_code)
996 {
997 case OP_PUSH_VOID:
998 op->type = slang_oper_void;
999 break;
1000 case OP_PUSH_BOOL:
1001 op->type = slang_oper_literal_bool;
1002 if (!parse_number (C, &number))
1003 return 0;
1004 op->literal = (GLfloat) number;
1005 break;
1006 case OP_PUSH_INT:
1007 op->type = slang_oper_literal_int;
1008 if (!parse_number (C, &number))
1009 return 0;
1010 op->literal = (GLfloat) number;
1011 break;
1012 case OP_PUSH_FLOAT:
1013 op->type = slang_oper_literal_float;
1014 if (!parse_float (C, &op->literal))
1015 return 0;
1016 break;
1017 case OP_PUSH_IDENTIFIER:
1018 op->type = slang_oper_identifier;
1019 op->a_id = parse_identifier (C);
1020 if (op->a_id == SLANG_ATOM_NULL)
1021 return 0;
1022 break;
1023 case OP_SEQUENCE:
1024 op->type = slang_oper_sequence;
1025 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1026 return 0;
1027 break;
1028 case OP_ASSIGN:
1029 op->type = slang_oper_assign;
1030 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1031 return 0;
1032 break;
1033 case OP_ADDASSIGN:
1034 op->type = slang_oper_addassign;
1035 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1036 return 0;
1037 break;
1038 case OP_SUBASSIGN:
1039 op->type = slang_oper_subassign;
1040 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1041 return 0;
1042 break;
1043 case OP_MULASSIGN:
1044 op->type = slang_oper_mulassign;
1045 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1046 return 0;
1047 break;
1048 case OP_DIVASSIGN:
1049 op->type = slang_oper_divassign;
1050 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1051 return 0;
1052 break;
1053 /*case OP_MODASSIGN:*/
1054 /*case OP_LSHASSIGN:*/
1055 /*case OP_RSHASSIGN:*/
1056 /*case OP_ORASSIGN:*/
1057 /*case OP_XORASSIGN:*/
1058 /*case OP_ANDASSIGN:*/
1059 case OP_SELECT:
1060 op->type = slang_oper_select;
1061 if (!handle_nary_expression (C, op, &ops, &num_ops, 3))
1062 return 0;
1063 break;
1064 case OP_LOGICALOR:
1065 op->type = slang_oper_logicalor;
1066 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1067 return 0;
1068 break;
1069 case OP_LOGICALXOR:
1070 op->type = slang_oper_logicalxor;
1071 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1072 return 0;
1073 break;
1074 case OP_LOGICALAND:
1075 op->type = slang_oper_logicaland;
1076 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1077 return 0;
1078 break;
1079 /*case OP_BITOR:*/
1080 /*case OP_BITXOR:*/
1081 /*case OP_BITAND:*/
1082 case OP_EQUAL:
1083 op->type = slang_oper_equal;
1084 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1085 return 0;
1086 break;
1087 case OP_NOTEQUAL:
1088 op->type = slang_oper_notequal;
1089 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1090 return 0;
1091 break;
1092 case OP_LESS:
1093 op->type = slang_oper_less;
1094 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1095 return 0;
1096 break;
1097 case OP_GREATER:
1098 op->type = slang_oper_greater;
1099 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1100 return 0;
1101 break;
1102 case OP_LESSEQUAL:
1103 op->type = slang_oper_lessequal;
1104 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1105 return 0;
1106 break;
1107 case OP_GREATEREQUAL:
1108 op->type = slang_oper_greaterequal;
1109 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1110 return 0;
1111 break;
1112 /*case OP_LSHIFT:*/
1113 /*case OP_RSHIFT:*/
1114 case OP_ADD:
1115 op->type = slang_oper_add;
1116 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1117 return 0;
1118 break;
1119 case OP_SUBTRACT:
1120 op->type = slang_oper_subtract;
1121 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1122 return 0;
1123 break;
1124 case OP_MULTIPLY:
1125 op->type = slang_oper_multiply;
1126 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1127 return 0;
1128 break;
1129 case OP_DIVIDE:
1130 op->type = slang_oper_divide;
1131 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1132 return 0;
1133 break;
1134 /*case OP_MODULUS:*/
1135 case OP_PREINCREMENT:
1136 op->type = slang_oper_preincrement;
1137 if (!handle_nary_expression (C, op, &ops, &num_ops, 1))
1138 return 0;
1139 break;
1140 case OP_PREDECREMENT:
1141 op->type = slang_oper_predecrement;
1142 if (!handle_nary_expression (C, op, &ops, &num_ops, 1))
1143 return 0;
1144 break;
1145 case OP_PLUS:
1146 op->type = slang_oper_plus;
1147 if (!handle_nary_expression (C, op, &ops, &num_ops, 1))
1148 return 0;
1149 break;
1150 case OP_MINUS:
1151 op->type = slang_oper_minus;
1152 if (!handle_nary_expression (C, op, &ops, &num_ops, 1))
1153 return 0;
1154 break;
1155 case OP_NOT:
1156 op->type = slang_oper_not;
1157 if (!handle_nary_expression (C, op, &ops, &num_ops, 1))
1158 return 0;
1159 break;
1160 /*case OP_COMPLEMENT:*/
1161 case OP_SUBSCRIPT:
1162 op->type = slang_oper_subscript;
1163 if (!handle_nary_expression (C, op, &ops, &num_ops, 2))
1164 return 0;
1165 break;
1166 case OP_CALL:
1167 op->type = slang_oper_call;
1168 op->a_id = parse_identifier (C);
1169 if (op->a_id == SLANG_ATOM_NULL)
1170 return 0;
1171 while (*C->I != OP_END)
1172 if (!parse_child_operation (C, O, op, 0))
1173 return 0;
1174 C->I++;
1175 if (!C->parsing_builtin && !slang_function_scope_find_by_name (O->funs, op->a_id, 1))
1176 {
1177 const char *id;
1178
1179 id = slang_atom_pool_id (C->atoms, op->a_id);
1180 if (!is_constructor_name (id, op->a_id, O->structs))
1181 {
1182 slang_info_log_error (C->L, "%s: undeclared function name.", id);
1183 return 0;
1184 }
1185 }
1186 break;
1187 case OP_FIELD:
1188 op->type = slang_oper_field;
1189 op->a_id = parse_identifier (C);
1190 if (op->a_id == SLANG_ATOM_NULL)
1191 return 0;
1192 if (!handle_nary_expression (C, op, &ops, &num_ops, 1))
1193 return 0;
1194 break;
1195 case OP_POSTINCREMENT:
1196 op->type = slang_oper_postincrement;
1197 if (!handle_nary_expression (C, op, &ops, &num_ops, 1))
1198 return 0;
1199 break;
1200 case OP_POSTDECREMENT:
1201 op->type = slang_oper_postdecrement;
1202 if (!handle_nary_expression (C, op, &ops, &num_ops, 1))
1203 return 0;
1204 break;
1205 default:
1206 return 0;
1207 }
1208 }
1209 C->I++;
1210
1211 *oper = *ops;
1212 slang_alloc_free (ops);
1213 return 1;
1214 }
1215
1216 /* parameter qualifier */
1217 #define PARAM_QUALIFIER_IN 0
1218 #define PARAM_QUALIFIER_OUT 1
1219 #define PARAM_QUALIFIER_INOUT 2
1220
1221 /* function parameter array presence */
1222 #define PARAMETER_ARRAY_NOT_PRESENT 0
1223 #define PARAMETER_ARRAY_PRESENT 1
1224
1225 static int parse_parameter_declaration (slang_parse_ctx *C, slang_output_ctx *O,
1226 slang_variable *param)
1227 {
1228 /* parse and validate the parameter's type qualifiers (there can be two at most) because
1229 * not all combinations are valid */
1230 if (!parse_type_qualifier (C, &param->type.qualifier))
1231 return 0;
1232 switch (*C->I++)
1233 {
1234 case PARAM_QUALIFIER_IN:
1235 if (param->type.qualifier != slang_qual_const && param->type.qualifier != slang_qual_none)
1236 {
1237 slang_info_log_error (C->L, "Invalid type qualifier.");
1238 return 0;
1239 }
1240 break;
1241 case PARAM_QUALIFIER_OUT:
1242 if (param->type.qualifier == slang_qual_none)
1243 param->type.qualifier = slang_qual_out;
1244 else
1245 {
1246 slang_info_log_error (C->L, "Invalid type qualifier.");
1247 return 0;
1248 }
1249 break;
1250 case PARAM_QUALIFIER_INOUT:
1251 if (param->type.qualifier == slang_qual_none)
1252 param->type.qualifier = slang_qual_inout;
1253 else
1254 {
1255 slang_info_log_error (C->L, "Invalid type qualifier.");
1256 return 0;
1257 }
1258 break;
1259 default:
1260 return 0;
1261 }
1262
1263 /* parse parameter's type specifier and name */
1264 if (!parse_type_specifier (C, O, &param->type.specifier))
1265 return 0;
1266 param->a_name = parse_identifier (C);
1267 if (param->a_name == SLANG_ATOM_NULL)
1268 return 0;
1269
1270 /* if the parameter is an array, parse its size (the size must be explicitly defined */
1271 if (*C->I++ == PARAMETER_ARRAY_PRESENT)
1272 {
1273 slang_type_specifier p;
1274
1275 slang_type_specifier_ctr (&p);
1276 if (!slang_type_specifier_copy (&p, &param->type.specifier))
1277 {
1278 slang_type_specifier_dtr (&p);
1279 return GL_FALSE;
1280 }
1281 if (!convert_to_array (C, param, &p))
1282 {
1283 slang_type_specifier_dtr (&p);
1284 return GL_FALSE;
1285 }
1286 slang_type_specifier_dtr (&p);
1287 if (!parse_array_len (C, O, &param->array_len))
1288 return GL_FALSE;
1289 }
1290
1291 /* calculate the parameter size */
1292 if (!calculate_var_size (C, O, param))
1293 return GL_FALSE;
1294
1295 /* TODO: allocate the local address here? */
1296 return 1;
1297 }
1298
1299 /* function type */
1300 #define FUNCTION_ORDINARY 0
1301 #define FUNCTION_CONSTRUCTOR 1
1302 #define FUNCTION_OPERATOR 2
1303
1304 /* function parameter */
1305 #define PARAMETER_NONE 0
1306 #define PARAMETER_NEXT 1
1307
1308 /* operator type */
1309 #define OPERATOR_ADDASSIGN 1
1310 #define OPERATOR_SUBASSIGN 2
1311 #define OPERATOR_MULASSIGN 3
1312 #define OPERATOR_DIVASSIGN 4
1313 /*#define OPERATOR_MODASSIGN 5*/
1314 /*#define OPERATOR_LSHASSIGN 6*/
1315 /*#define OPERATOR_RSHASSIGN 7*/
1316 /*#define OPERATOR_ANDASSIGN 8*/
1317 /*#define OPERATOR_XORASSIGN 9*/
1318 /*#define OPERATOR_ORASSIGN 10*/
1319 #define OPERATOR_LOGICALXOR 11
1320 /*#define OPERATOR_BITOR 12*/
1321 /*#define OPERATOR_BITXOR 13*/
1322 /*#define OPERATOR_BITAND 14*/
1323 #define OPERATOR_LESS 15
1324 #define OPERATOR_GREATER 16
1325 #define OPERATOR_LESSEQUAL 17
1326 #define OPERATOR_GREATEREQUAL 18
1327 /*#define OPERATOR_LSHIFT 19*/
1328 /*#define OPERATOR_RSHIFT 20*/
1329 #define OPERATOR_MULTIPLY 21
1330 #define OPERATOR_DIVIDE 22
1331 /*#define OPERATOR_MODULUS 23*/
1332 #define OPERATOR_INCREMENT 24
1333 #define OPERATOR_DECREMENT 25
1334 #define OPERATOR_PLUS 26
1335 #define OPERATOR_MINUS 27
1336 /*#define OPERATOR_COMPLEMENT 28*/
1337 #define OPERATOR_NOT 29
1338
1339 static const struct {
1340 unsigned int o_code;
1341 const char *o_name;
1342 } operator_names[] = {
1343 { OPERATOR_INCREMENT, "++" },
1344 { OPERATOR_ADDASSIGN, "+=" },
1345 { OPERATOR_PLUS, "+" },
1346 { OPERATOR_DECREMENT, "--" },
1347 { OPERATOR_SUBASSIGN, "-=" },
1348 { OPERATOR_MINUS, "-" },
1349 { OPERATOR_NOT, "!" },
1350 { OPERATOR_MULASSIGN, "*=" },
1351 { OPERATOR_MULTIPLY, "*" },
1352 { OPERATOR_DIVASSIGN, "/=" },
1353 { OPERATOR_DIVIDE, "/" },
1354 { OPERATOR_LESSEQUAL, "<=" },
1355 /*{ OPERATOR_LSHASSIGN, "<<=" },*/
1356 /*{ OPERATOR_LSHIFT, "<<" },*/
1357 { OPERATOR_LESS, "<" },
1358 { OPERATOR_GREATEREQUAL, ">=" },
1359 /*{ OPERATOR_RSHASSIGN, ">>=" },*/
1360 /*{ OPERATOR_RSHIFT, ">>" },*/
1361 { OPERATOR_GREATER, ">" },
1362 /*{ OPERATOR_MODASSIGN, "%=" },*/
1363 /*{ OPERATOR_MODULUS, "%" },*/
1364 /*{ OPERATOR_ANDASSIGN, "&=" },*/
1365 /*{ OPERATOR_BITAND, "&" },*/
1366 /*{ OPERATOR_ORASSIGN, "|=" },*/
1367 /*{ OPERATOR_BITOR, "|" },*/
1368 /*{ OPERATOR_COMPLEMENT, "~" },*/
1369 /*{ OPERATOR_XORASSIGN, "^=" },*/
1370 { OPERATOR_LOGICALXOR, "^^" },
1371 /*{ OPERATOR_BITXOR, "^" }*/
1372 };
1373
1374 static slang_atom parse_operator_name (slang_parse_ctx *C)
1375 {
1376 unsigned int i;
1377
1378 for (i = 0; i < sizeof (operator_names) / sizeof (*operator_names); i++)
1379 {
1380 if (operator_names[i].o_code == (unsigned int) (*C->I))
1381 {
1382 slang_atom atom = slang_atom_pool_atom (C->atoms, operator_names[i].o_name);
1383 if (atom == SLANG_ATOM_NULL)
1384 {
1385 slang_info_log_memory (C->L);
1386 return 0;
1387 }
1388 C->I++;
1389 return atom;
1390 }
1391 }
1392 return 0;
1393 }
1394
1395 static int parse_function_prototype (slang_parse_ctx *C, slang_output_ctx *O, slang_function *func)
1396 {
1397 /* parse function type and name */
1398 if (!parse_fully_specified_type (C, O, &func->header.type))
1399 return 0;
1400 switch (*C->I++)
1401 {
1402 case FUNCTION_ORDINARY:
1403 func->kind = slang_func_ordinary;
1404 func->header.a_name = parse_identifier (C);
1405 if (func->header.a_name == SLANG_ATOM_NULL)
1406 return 0;
1407 break;
1408 case FUNCTION_CONSTRUCTOR:
1409 func->kind = slang_func_constructor;
1410 if (func->header.type.specifier.type == slang_spec_struct)
1411 return 0;
1412 func->header.a_name = slang_atom_pool_atom (C->atoms,
1413 slang_type_specifier_type_to_string (func->header.type.specifier.type));
1414 if (func->header.a_name == SLANG_ATOM_NULL)
1415 {
1416 slang_info_log_memory (C->L);
1417 return 0;
1418 }
1419 break;
1420 case FUNCTION_OPERATOR:
1421 func->kind = slang_func_operator;
1422 func->header.a_name = parse_operator_name (C);
1423 if (func->header.a_name == SLANG_ATOM_NULL)
1424 return 0;
1425 break;
1426 default:
1427 return 0;
1428 }
1429
1430 /* parse function parameters */
1431 while (*C->I++ == PARAMETER_NEXT)
1432 {
1433 slang_variable *p;
1434
1435 func->parameters->variables = (slang_variable *) slang_alloc_realloc (
1436 func->parameters->variables,
1437 func->parameters->num_variables * sizeof (slang_variable),
1438 (func->parameters->num_variables + 1) * sizeof (slang_variable));
1439 if (func->parameters->variables == NULL)
1440 {
1441 slang_info_log_memory (C->L);
1442 return 0;
1443 }
1444 p = &func->parameters->variables[func->parameters->num_variables];
1445 if (!slang_variable_construct (p))
1446 return 0;
1447 func->parameters->num_variables++;
1448 if (!parse_parameter_declaration (C, O, p))
1449 return 0;
1450 }
1451
1452 /* function formal parameters and local variables share the same scope, so save
1453 * the information about param count in a seperate place
1454 * also link the scope to the global variable scope so when a given identifier is not
1455 * found here, the search process continues in the global space */
1456 func->param_count = func->parameters->num_variables;
1457 func->parameters->outer_scope = O->vars;
1458 return 1;
1459 }
1460
1461 static int parse_function_definition (slang_parse_ctx *C, slang_output_ctx *O, slang_function *func)
1462 {
1463 slang_output_ctx o = *O;
1464
1465 if (!parse_function_prototype (C, O, func))
1466 return 0;
1467
1468 /* create function's body operation */
1469 func->body = (slang_operation *) slang_alloc_malloc (sizeof (slang_operation));
1470 if (func->body == NULL)
1471 {
1472 slang_info_log_memory (C->L);
1473 return 0;
1474 }
1475 if (!slang_operation_construct (func->body))
1476 {
1477 slang_alloc_free (func->body);
1478 func->body = NULL;
1479 slang_info_log_memory (C->L);
1480 return 0;
1481 }
1482
1483 /* to parse the body the parse context is modified in order to capture parsed variables
1484 * into function's local variable scope */
1485 C->global_scope = 0;
1486 o.vars = func->parameters;
1487 if (!parse_statement (C, &o, func->body))
1488 return 0;
1489 C->global_scope = 1;
1490 return 1;
1491 }
1492
1493 static GLboolean initialize_global (slang_assemble_ctx *A, slang_variable *var)
1494 {
1495 slang_assembly_file_restore_point point;
1496 slang_machine mach;
1497 slang_assembly_local_info save_local = A->local;
1498 slang_operation op_id, op_assign;
1499 GLboolean result;
1500
1501 /* save the current assembly */
1502 if (!slang_assembly_file_restore_point_save (A->file, &point))
1503 return GL_FALSE;
1504
1505 /* setup the machine */
1506 mach = *A->mach;
1507 mach.ip = A->file->count;
1508
1509 /* allocate local storage for expression */
1510 A->local.ret_size = 0;
1511 A->local.addr_tmp = 0;
1512 A->local.swizzle_tmp = 4;
1513 if (!slang_assembly_file_push_label (A->file, slang_asm_local_alloc, 20))
1514 return GL_FALSE;
1515 if (!slang_assembly_file_push_label (A->file, slang_asm_enter, 20))
1516 return GL_FALSE;
1517
1518 /* construct the left side of assignment */
1519 if (!slang_operation_construct (&op_id))
1520 return GL_FALSE;
1521 op_id.type = slang_oper_identifier;
1522 op_id.a_id = var->a_name;
1523
1524 /* put the variable into operation's scope */
1525 op_id.locals->variables = (slang_variable *) slang_alloc_malloc (sizeof (slang_variable));
1526 if (op_id.locals->variables == NULL)
1527 {
1528 slang_operation_destruct (&op_id);
1529 return GL_FALSE;
1530 }
1531 op_id.locals->num_variables = 1;
1532 op_id.locals->variables[0] = *var;
1533
1534 /* construct the assignment expression */
1535 if (!slang_operation_construct (&op_assign))
1536 {
1537 op_id.locals->num_variables = 0;
1538 slang_operation_destruct (&op_id);
1539 return GL_FALSE;
1540 }
1541 op_assign.type = slang_oper_assign;
1542 op_assign.children = (slang_operation *) slang_alloc_malloc (2 * sizeof (slang_operation));
1543 if (op_assign.children == NULL)
1544 {
1545 slang_operation_destruct (&op_assign);
1546 op_id.locals->num_variables = 0;
1547 slang_operation_destruct (&op_id);
1548 return GL_FALSE;
1549 }
1550 op_assign.num_children = 2;
1551 op_assign.children[0] = op_id;
1552 op_assign.children[1] = *var->initializer;
1553
1554 /* insert the actual expression */
1555 result = _slang_assemble_operation (A, &op_assign, slang_ref_forbid);
1556
1557 /* carefully destroy the operations */
1558 op_assign.num_children = 0;
1559 slang_alloc_free (op_assign.children);
1560 op_assign.children = NULL;
1561 slang_operation_destruct (&op_assign);
1562 op_id.locals->num_variables = 0;
1563 slang_operation_destruct (&op_id);
1564
1565 if (!result)
1566 return GL_FALSE;
1567 if (!slang_assembly_file_push (A->file, slang_asm_exit))
1568 return GL_FALSE;
1569
1570 /* execute the expression */
1571 if (!_slang_execute2 (A->file, &mach))
1572 return GL_FALSE;
1573
1574 /* restore the old assembly */
1575 if (!slang_assembly_file_restore_point_load (A->file, &point))
1576 return GL_FALSE;
1577 A->local = save_local;
1578
1579 /* now we copy the contents of the initialized variable back to the original machine */
1580 _mesa_memcpy ((GLubyte *) A->mach->mem + var->address, (GLubyte *) mach.mem + var->address,
1581 var->size);
1582
1583 return GL_TRUE;
1584 }
1585
1586 /* init declarator list */
1587 #define DECLARATOR_NONE 0
1588 #define DECLARATOR_NEXT 1
1589
1590 /* variable declaration */
1591 #define VARIABLE_NONE 0
1592 #define VARIABLE_IDENTIFIER 1
1593 #define VARIABLE_INITIALIZER 2
1594 #define VARIABLE_ARRAY_EXPLICIT 3
1595 #define VARIABLE_ARRAY_UNKNOWN 4
1596
1597 static int parse_init_declarator (slang_parse_ctx *C, slang_output_ctx *O,
1598 const slang_fully_specified_type *type)
1599 {
1600 slang_variable *var;
1601
1602 /* empty init declatator (without name, e.g. "float ;") */
1603 if (*C->I++ == VARIABLE_NONE)
1604 return 1;
1605
1606 /* make room for the new variable and initialize it */
1607 O->vars->variables = (slang_variable *) slang_alloc_realloc (O->vars->variables,
1608 O->vars->num_variables * sizeof (slang_variable),
1609 (O->vars->num_variables + 1) * sizeof (slang_variable));
1610 if (O->vars->variables == NULL)
1611 {
1612 slang_info_log_memory (C->L);
1613 return 0;
1614 }
1615 var = &O->vars->variables[O->vars->num_variables];
1616 if (!slang_variable_construct (var))
1617 return 0;
1618 O->vars->num_variables++;
1619
1620 /* copy the declarator qualifier type, parse the identifier */
1621 var->global = C->global_scope;
1622 var->type.qualifier = type->qualifier;
1623 var->a_name = parse_identifier (C);
1624 if (var->a_name == SLANG_ATOM_NULL)
1625 return 0;
1626
1627 switch (*C->I++)
1628 {
1629 case VARIABLE_NONE:
1630 /* simple variable declarator - just copy the specifier */
1631 if (!slang_type_specifier_copy (&var->type.specifier, &type->specifier))
1632 return 0;
1633 break;
1634 case VARIABLE_INITIALIZER:
1635 /* initialized variable - copy the specifier and parse the expression */
1636 if (!slang_type_specifier_copy (&var->type.specifier, &type->specifier))
1637 return 0;
1638 var->initializer = (slang_operation *) slang_alloc_malloc (sizeof (slang_operation));
1639 if (var->initializer == NULL)
1640 {
1641 slang_info_log_memory (C->L);
1642 return 0;
1643 }
1644 if (!slang_operation_construct (var->initializer))
1645 {
1646 slang_alloc_free (var->initializer);
1647 var->initializer = NULL;
1648 slang_info_log_memory (C->L);
1649 return 0;
1650 }
1651 if (!parse_expression (C, O, var->initializer))
1652 return 0;
1653 break;
1654 #if 0
1655 case VARIABLE_ARRAY_UNKNOWN:
1656 /* unsized array - mark it as array and copy the specifier to the array element */
1657 if (!convert_to_array (C, var, &type->specifier))
1658 return GL_FALSE;
1659 break;
1660 #endif
1661 case VARIABLE_ARRAY_EXPLICIT:
1662 if (!convert_to_array (C, var, &type->specifier))
1663 return GL_FALSE;
1664 if (!parse_array_len (C, O, &var->array_len))
1665 return GL_FALSE;
1666 break;
1667 default:
1668 return 0;
1669 }
1670
1671 /* allocate global address space for a variable with a known size */
1672 if (C->global_scope && !(var->type.specifier.type == slang_spec_array && var->array_len == 0))
1673 {
1674 if (!calculate_var_size (C, O, var))
1675 return GL_FALSE;
1676 var->address = slang_var_pool_alloc (O->global_pool, var->size);
1677 }
1678
1679 /* initialize global variable */
1680 if (C->global_scope) {
1681 if (var->initializer != NULL) {
1682 slang_assemble_ctx A;
1683
1684 A.file = O->assembly;
1685 A.mach = O->machine;
1686 A.atoms = C->atoms;
1687 A.space.funcs = O->funs;
1688 A.space.structs = O->structs;
1689 A.space.vars = O->vars;
1690 if (!initialize_global (&A, var))
1691 return 0;
1692 }
1693 else {
1694 _mesa_memset ((GLubyte *) (O->machine->mem) + var->address, 0, var->size);
1695 }
1696 }
1697 return 1;
1698 }
1699
1700 static int parse_init_declarator_list (slang_parse_ctx *C, slang_output_ctx *O)
1701 {
1702 slang_fully_specified_type type;
1703
1704 /* parse the fully specified type, common to all declarators */
1705 if (!slang_fully_specified_type_construct (&type))
1706 return 0;
1707 if (!parse_fully_specified_type (C, O, &type))
1708 {
1709 slang_fully_specified_type_destruct (&type);
1710 return 0;
1711 }
1712
1713 /* parse declarators, pass-in the parsed type */
1714 do
1715 {
1716 if (!parse_init_declarator (C, O, &type))
1717 {
1718 slang_fully_specified_type_destruct (&type);
1719 return 0;
1720 }
1721 }
1722 while (*C->I++ == DECLARATOR_NEXT);
1723
1724 slang_fully_specified_type_destruct (&type);
1725 return 1;
1726 }
1727
1728 static int parse_function (slang_parse_ctx *C, slang_output_ctx *O, int definition,
1729 slang_function **parsed_func_ret)
1730 {
1731 slang_function parsed_func, *found_func;
1732
1733 /* parse function definition/declaration */
1734 if (!slang_function_construct (&parsed_func))
1735 return 0;
1736 if (definition)
1737 {
1738 if (!parse_function_definition (C, O, &parsed_func))
1739 {
1740 slang_function_destruct (&parsed_func);
1741 return 0;
1742 }
1743 }
1744 else
1745 {
1746 if (!parse_function_prototype (C, O, &parsed_func))
1747 {
1748 slang_function_destruct (&parsed_func);
1749 return 0;
1750 }
1751 }
1752
1753 /* find a function with a prototype matching the parsed one - only the current scope
1754 * is being searched to allow built-in function overriding */
1755 found_func = slang_function_scope_find (O->funs, &parsed_func, 0);
1756 if (found_func == NULL)
1757 {
1758 /* add the parsed function to the function list */
1759 O->funs->functions = (slang_function *) slang_alloc_realloc (O->funs->functions,
1760 O->funs->num_functions * sizeof (slang_function),
1761 (O->funs->num_functions + 1) * sizeof (slang_function));
1762 if (O->funs->functions == NULL)
1763 {
1764 slang_info_log_memory (C->L);
1765 slang_function_destruct (&parsed_func);
1766 return 0;
1767 }
1768 O->funs->functions[O->funs->num_functions] = parsed_func;
1769 O->funs->num_functions++;
1770
1771 /* return the newly parsed function */
1772 *parsed_func_ret = &O->funs->functions[O->funs->num_functions - 1];
1773 }
1774 else
1775 {
1776 /* TODO: check function return type qualifiers and specifiers */
1777 if (definition)
1778 {
1779 if (found_func->body != NULL)
1780 {
1781 slang_info_log_error (C->L, "%s: function already has a body.",
1782 slang_atom_pool_id (C->atoms, parsed_func.header.a_name));
1783 slang_function_destruct (&parsed_func);
1784 return 0;
1785 }
1786
1787 /* destroy the existing function declaration and replace it with the new one,
1788 * remember to save the fixup table */
1789 parsed_func.fixups = found_func->fixups;
1790 slang_fixup_table_init (&found_func->fixups);
1791 slang_function_destruct (found_func);
1792 *found_func = parsed_func;
1793 }
1794 else
1795 {
1796 /* another declaration of the same function prototype - ignore it */
1797 slang_function_destruct (&parsed_func);
1798 }
1799
1800 /* return the found function */
1801 *parsed_func_ret = found_func;
1802 }
1803
1804 /* assemble the parsed function */
1805 {
1806 slang_assemble_ctx A;
1807
1808 A.file = O->assembly;
1809 A.mach = O->machine;
1810 A.atoms = C->atoms;
1811 A.space.funcs = O->funs;
1812 A.space.structs = O->structs;
1813 A.space.vars = O->vars;
1814 if (!_slang_assemble_function (&A, *parsed_func_ret))
1815 return 0;
1816 }
1817 return 1;
1818 }
1819
1820 /* declaration */
1821 #define DECLARATION_FUNCTION_PROTOTYPE 1
1822 #define DECLARATION_INIT_DECLARATOR_LIST 2
1823
1824 static int parse_declaration (slang_parse_ctx *C, slang_output_ctx *O)
1825 {
1826 switch (*C->I++)
1827 {
1828 case DECLARATION_INIT_DECLARATOR_LIST:
1829 if (!parse_init_declarator_list (C, O))
1830 return 0;
1831 break;
1832 case DECLARATION_FUNCTION_PROTOTYPE:
1833 {
1834 slang_function *dummy_func;
1835
1836 if (!parse_function (C, O, 0, &dummy_func))
1837 return 0;
1838 }
1839 break;
1840 default:
1841 return 0;
1842 }
1843 return 1;
1844 }
1845
1846 /* external declaration */
1847 #define EXTERNAL_NULL 0
1848 #define EXTERNAL_FUNCTION_DEFINITION 1
1849 #define EXTERNAL_DECLARATION 2
1850
1851 static GLboolean
1852 parse_code_unit (slang_parse_ctx *C, slang_code_unit *unit)
1853 {
1854 slang_output_ctx o;
1855
1856 /* setup output context */
1857 o.funs = &unit->funs;
1858 o.structs = &unit->structs;
1859 o.vars = &unit->vars;
1860 o.assembly = &unit->object->assembly;
1861 o.global_pool = &unit->object->varpool;
1862 o.machine = &unit->object->machine;
1863
1864 /* parse individual functions and declarations */
1865 while (*C->I != EXTERNAL_NULL)
1866 {
1867 switch (*C->I++)
1868 {
1869 case EXTERNAL_FUNCTION_DEFINITION:
1870 {
1871 slang_function *func;
1872
1873 if (!parse_function (C, &o, 1, &func))
1874 return 0;
1875 }
1876 break;
1877 case EXTERNAL_DECLARATION:
1878 if (!parse_declaration (C, &o))
1879 return 0;
1880 break;
1881 default:
1882 return 0;
1883 }
1884 }
1885 C->I++;
1886 return 1;
1887 }
1888
1889 static GLboolean
1890 compile_binary (const byte *prod, slang_code_unit *unit, slang_unit_type type,
1891 slang_info_log *infolog, slang_code_unit *builtin, slang_code_unit *downlink)
1892 {
1893 slang_parse_ctx C;
1894
1895 unit->type = type;
1896
1897 /* setup parse context */
1898 C.I = prod;
1899 C.L = infolog;
1900 C.parsing_builtin = (builtin == NULL);
1901 C.global_scope = GL_TRUE;
1902 C.atoms = &unit->object->atompool;
1903
1904 if (!check_revision (&C))
1905 return GL_FALSE;
1906
1907 if (downlink != NULL) {
1908 unit->vars.outer_scope = &downlink->vars;
1909 unit->funs.outer_scope = &downlink->funs;
1910 unit->structs.outer_scope = &downlink->structs;
1911 }
1912
1913 /* parse translation unit */
1914 return parse_code_unit (&C, unit);
1915 }
1916
1917 static GLboolean
1918 compile_with_grammar (grammar id, const char *source, slang_code_unit *unit, slang_unit_type type,
1919 slang_info_log *infolog, slang_code_unit *builtin)
1920 {
1921 byte *prod;
1922 GLuint size, start, version;
1923 slang_string preprocessed;
1924
1925 /* First retrieve the version number. */
1926 if (!_slang_preprocess_version (source, &version, &start, infolog))
1927 return GL_FALSE;
1928
1929 if (version > 110) {
1930 slang_info_log_error (infolog, "language version specified is not supported.");
1931 return GL_FALSE;
1932 }
1933
1934 /* Now preprocess the source string. */
1935 slang_string_init (&preprocessed);
1936 if (!_slang_preprocess_directives (&preprocessed, &source[start], infolog)) {
1937 slang_string_free (&preprocessed);
1938 slang_info_log_error (infolog, "failed to preprocess the source.");
1939 return GL_FALSE;
1940 }
1941
1942 /* Finally check the syntax and generate its binary representation. */
1943 if (!grammar_fast_check (id, (const byte *) (slang_string_cstr (&preprocessed)), &prod, &size, 65536)) {
1944 char buf[1024];
1945 GLint pos;
1946
1947 slang_string_free (&preprocessed);
1948 grammar_get_last_error ((byte *) (buf), sizeof (buf), &pos);
1949 slang_info_log_error (infolog, buf);
1950 return GL_FALSE;
1951 }
1952 slang_string_free (&preprocessed);
1953
1954 /* Syntax is okay - translate it to internal representation. */
1955 if (!compile_binary (prod, unit, type, infolog, builtin, &builtin[SLANG_BUILTIN_TOTAL - 1])) {
1956 grammar_alloc_free (prod);
1957 return GL_FALSE;
1958 }
1959 grammar_alloc_free (prod);
1960 return GL_TRUE;
1961 }
1962
1963 static const char *slang_shader_syn =
1964 #include "library/slang_shader_syn.h"
1965 ;
1966
1967 static const byte slang_core_gc[] = {
1968 #include "library/slang_core_gc.h"
1969 };
1970
1971 static const byte slang_common_builtin_gc[] = {
1972 #include "library/slang_common_builtin_gc.h"
1973 };
1974
1975 static const byte slang_fragment_builtin_gc[] = {
1976 #include "library/slang_fragment_builtin_gc.h"
1977 };
1978
1979 static const byte slang_vertex_builtin_gc[] = {
1980 #include "library/slang_vertex_builtin_gc.h"
1981 };
1982
1983 #if defined(USE_X86_ASM) || defined(SLANG_X86)
1984 static const byte slang_builtin_vec4_gc[] = {
1985 #include "library/slang_builtin_vec4_gc.h"
1986 };
1987 #endif
1988
1989 static GLboolean
1990 compile_object (grammar *id, const char *source, slang_code_object *object, slang_unit_type type,
1991 slang_info_log *infolog)
1992 {
1993 slang_code_unit *builtins = NULL;
1994
1995 /* load GLSL grammar */
1996 *id = grammar_load_from_text ((const byte *) (slang_shader_syn));
1997 if (*id == 0)
1998 {
1999 byte buf[1024];
2000 int pos;
2001
2002 grammar_get_last_error (buf, 1024, &pos);
2003 slang_info_log_error (infolog, (const char *) (buf));
2004 return GL_FALSE;
2005 }
2006
2007 /* set shader type - the syntax is slightly different for different shaders */
2008 if (type == slang_unit_fragment_shader || type == slang_unit_fragment_builtin)
2009 grammar_set_reg8 (*id, (const byte *) "shader_type", 1);
2010 else
2011 grammar_set_reg8 (*id, (const byte *) "shader_type", 2);
2012
2013 /* enable language extensions */
2014 grammar_set_reg8 (*id, (const byte *) "parsing_builtin", 1);
2015
2016 /* if parsing user-specified shader, load built-in library */
2017 if (type == slang_unit_fragment_shader || type == slang_unit_vertex_shader)
2018 {
2019 /* compile core functionality first */
2020 if (!compile_binary (slang_core_gc, &object->builtin[SLANG_BUILTIN_CORE],
2021 slang_unit_fragment_builtin, infolog, NULL, NULL))
2022 return GL_FALSE;
2023
2024 /* compile common functions and variables, link to core */
2025 if (!compile_binary (slang_common_builtin_gc, &object->builtin[SLANG_BUILTIN_COMMON],
2026 slang_unit_fragment_builtin, infolog, NULL,
2027 &object->builtin[SLANG_BUILTIN_CORE]))
2028 return GL_FALSE;
2029
2030 /* compile target-specific functions and variables, link to common */
2031 if (type == slang_unit_fragment_shader)
2032 {
2033 if (!compile_binary (slang_fragment_builtin_gc, &object->builtin[SLANG_BUILTIN_TARGET],
2034 slang_unit_fragment_builtin, infolog, NULL,
2035 &object->builtin[SLANG_BUILTIN_COMMON]))
2036 return GL_FALSE;
2037 }
2038 else if (type == slang_unit_vertex_shader)
2039 {
2040 if (!compile_binary (slang_vertex_builtin_gc, &object->builtin[SLANG_BUILTIN_TARGET],
2041 slang_unit_vertex_builtin, infolog, NULL,
2042 &object->builtin[SLANG_BUILTIN_COMMON]))
2043 return GL_FALSE;
2044 }
2045
2046 #if defined(USE_X86_ASM) || defined(SLANG_X86)
2047 /* compile x86 4-component vector overrides, link to target */
2048 if (!compile_binary (slang_builtin_vec4_gc, &object->builtin[SLANG_BUILTIN_VEC4],
2049 slang_unit_fragment_builtin, infolog, NULL,
2050 &object->builtin[SLANG_BUILTIN_TARGET]))
2051 return GL_FALSE;
2052 #endif
2053
2054 /* disable language extensions */
2055 grammar_set_reg8 (*id, (const byte *) "parsing_builtin", 0);
2056 builtins = object->builtin;
2057 }
2058
2059 /* compile the actual shader - pass-in built-in library for external shader */
2060 return compile_with_grammar (*id, source, &object->unit, type, infolog, builtins);
2061 }
2062
2063 GLboolean
2064 _slang_compile (const char *source, slang_code_object *object, slang_unit_type type,
2065 slang_info_log *infolog)
2066 {
2067 GLboolean success;
2068 grammar id = 0;
2069
2070 _slang_code_object_dtr (object);
2071 _slang_code_object_ctr (object);
2072
2073 success = compile_object (&id, source, object, type, infolog);
2074 if (id != 0)
2075 grammar_destroy (id);
2076 if (!success)
2077 return GL_FALSE;
2078
2079 if (!_slang_build_export_data_table (&object->expdata, &object->unit.vars))
2080 return GL_FALSE;
2081 if (!_slang_build_export_code_table (&object->expcode, &object->unit.funs, &object->unit))
2082 return GL_FALSE;
2083
2084 #if defined(USE_X86_ASM) || defined(SLANG_X86)
2085 /* XXX: lookup the @main label */
2086 if (!_slang_x86_codegen (&object->machine, &object->assembly, object->expcode.entries[0].address))
2087 return GL_FALSE;
2088 #endif
2089
2090 return GL_TRUE;
2091 }
2092