src/glsl/glsl_parser_extras.cpp

   1 /*
   2  * Copyright © 2008, 2009 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23 #include <stdio.h>
  24 #include <stdarg.h>
  25 #include <string.h>
  26 #include <assert.h>
  27
  28 extern "C" {
  29 #include <talloc.h>
  30 #include "main/mtypes.h"
  31 }
  32
  33 #include "ast.h"
  34 #include "glsl_parser_extras.h"
  35 #include "glsl_parser.h"
  36
  37 const char *
  38 _mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target)
  39 {
  40    switch (target) {
  41    case vertex_shader:   return "vertex";
  42    case fragment_shader: return "fragment";
  43    case geometry_shader: return "geometry";
  44    case ir_shader:       break;
  45    }
  46
  47    assert(!"Should not get here.");
  48 }
  49
  50
  51 void
  52 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
  53                  const char *fmt, ...)
  54 {
  55    va_list ap;
  56
  57    state->error = true;
  58
  59    assert(state->info_log != NULL);
  60    state->info_log = talloc_asprintf_append(state->info_log,
  61                                             "%u:%u(%u): error: ",
  62                                             locp->source,
  63                                             locp->first_line,
  64                                             locp->first_column);
  65    va_start(ap, fmt);
  66    state->info_log = talloc_vasprintf_append(state->info_log, fmt, ap);
  67    va_end(ap);
  68    state->info_log = talloc_strdup_append(state->info_log, "\n");
  69 }
  70
  71
  72 void
  73 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
  74                    const char *fmt, ...)
  75 {
  76    va_list ap;
  77
  78    assert(state->info_log != NULL);
  79    state->info_log = talloc_asprintf_append(state->info_log,
  80                                             "%u:%u(%u): warning: ",
  81                                             locp->source,
  82                                             locp->first_line,
  83                                             locp->first_column);
  84    va_start(ap, fmt);
  85    state->info_log = talloc_vasprintf_append(state->info_log, fmt, ap);
  86    va_end(ap);
  87    state->info_log = talloc_strdup_append(state->info_log, "\n");
  88 }
  89
  90
  91 bool
  92 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
  93                              const char *behavior, YYLTYPE *behavior_locp,
  94                              _mesa_glsl_parse_state *state)
  95 {
  96    enum {
  97       extension_disable,
  98       extension_enable,
  99       extension_require,
 100       extension_warn
 101    } ext_mode;
 102
 103    if (strcmp(behavior, "warn") == 0) {
 104       ext_mode = extension_warn;
 105    } else if (strcmp(behavior, "require") == 0) {
 106       ext_mode = extension_require;
 107    } else if (strcmp(behavior, "enable") == 0) {
 108       ext_mode = extension_enable;
 109    } else if (strcmp(behavior, "disable") == 0) {
 110       ext_mode = extension_disable;
 111    } else {
 112       _mesa_glsl_error(behavior_locp, state,
 113                        "Unknown extension behavior `%s'",
 114                        behavior);
 115       return false;
 116    }
 117
 118    bool unsupported = false;
 119
 120    if (strcmp(name, "all") == 0) {
 121       if ((ext_mode == extension_enable) || (ext_mode == extension_require)) {
 122          _mesa_glsl_error(name_locp, state, "Cannot %s all extensions",
 123                           (ext_mode == extension_enable)
 124                           ? "enable" : "require");
 125          return false;
 126       }
 127    } else if (strcmp(name, "GL_ARB_draw_buffers") == 0) {
 128       /* This extension is only supported in fragment shaders.
 129        */
 130       if (state->target != fragment_shader) {
 131          unsupported = true;
 132       } else {
 133          state->ARB_draw_buffers_enable = (ext_mode != extension_disable);
 134          state->ARB_draw_buffers_warn = (ext_mode == extension_warn);
 135       }
 136    } else if (strcmp(name, "GL_ARB_texture_rectangle") == 0) {
 137       state->ARB_texture_rectangle_enable = (ext_mode != extension_disable);
 138       state->ARB_texture_rectangle_warn = (ext_mode == extension_warn);
 139    } else if (strcmp(name, "GL_EXT_texture_array") == 0) {
 140       state->EXT_texture_array_enable = (ext_mode != extension_disable);
 141       state->EXT_texture_array_warn = (ext_mode == extension_warn);
 142
 143       unsupported = !state->extensions->EXT_texture_array;
 144    } else {
 145       unsupported = true;
 146    }
 147
 148    if (unsupported) {
 149       static const char *const fmt = "extension `%s' unsupported in %s shader";
 150
 151       if (ext_mode == extension_require) {
 152          _mesa_glsl_error(name_locp, state, fmt,
 153                           name, _mesa_glsl_shader_target_name(state->target));
 154          return false;
 155       } else {
 156          _mesa_glsl_warning(name_locp, state, fmt,
 157                             name, _mesa_glsl_shader_target_name(state->target));
 158       }
 159    }
 160
 161    return true;
 162 }
 163
 164 void
 165 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
 166 {
 167    if (q->constant)
 168       printf("const ");
 169
 170    if (q->invariant)
 171       printf("invariant ");
 172
 173    if (q->attribute)
 174       printf("attribute ");
 175
 176    if (q->varying)
 177       printf("varying ");
 178
 179    if (q->in && q->out)
 180       printf("inout ");
 181    else {
 182       if (q->in)
 183          printf("in ");
 184
 185       if (q->out)
 186          printf("out ");
 187    }
 188
 189    if (q->centroid)
 190       printf("centroid ");
 191    if (q->uniform)
 192       printf("uniform ");
 193    if (q->smooth)
 194       printf("smooth ");
 195    if (q->flat)
 196       printf("flat ");
 197    if (q->noperspective)
 198       printf("noperspective ");
 199 }
 200
 201
 202 void
 203 ast_node::print(void) const
 204 {
 205    printf("unhandled node ");
 206 }
 207
 208
 209 ast_node::ast_node(void)
 210 {
 211    /* empty */
 212 }
 213
 214
 215 static void
 216 ast_opt_array_size_print(bool is_array, const ast_expression *array_size)
 217 {
 218    if (is_array) {
 219       printf("[ ");
 220
 221       if (array_size)
 222          array_size->print();
 223
 224       printf("] ");
 225    }
 226 }
 227
 228
 229 void
 230 ast_compound_statement::print(void) const
 231 {
 232    printf("{\n");
 233
 234    foreach_list_const(n, &this->statements) {
 235       ast_node *ast = exec_node_data(ast_node, n, link);
 236       ast->print();
 237    }
 238
 239    printf("}\n");
 240 }
 241
 242
 243 ast_compound_statement::ast_compound_statement(int new_scope,
 244                                                ast_node *statements)
 245 {
 246    this->new_scope = new_scope;
 247
 248    if (statements != NULL) {
 249       this->statements.push_degenerate_list_at_head(&statements->link);
 250    }
 251 }
 252
 253
 254 void
 255 ast_expression::print(void) const
 256 {
 257    switch (oper) {
 258    case ast_assign:
 259    case ast_mul_assign:
 260    case ast_div_assign:
 261    case ast_mod_assign:
 262    case ast_add_assign:
 263    case ast_sub_assign:
 264    case ast_ls_assign:
 265    case ast_rs_assign:
 266    case ast_and_assign:
 267    case ast_xor_assign:
 268    case ast_or_assign:
 269       subexpressions[0]->print();
 270       printf("%s ", operator_string(oper));
 271       subexpressions[1]->print();
 272       break;
 273
 274    case ast_field_selection:
 275       subexpressions[0]->print();
 276       printf(". %s ", primary_expression.identifier);
 277       break;
 278
 279    case ast_plus:
 280    case ast_neg:
 281    case ast_bit_not:
 282    case ast_logic_not:
 283    case ast_pre_inc:
 284    case ast_pre_dec:
 285       printf("%s ", operator_string(oper));
 286       subexpressions[0]->print();
 287       break;
 288
 289    case ast_post_inc:
 290    case ast_post_dec:
 291       subexpressions[0]->print();
 292       printf("%s ", operator_string(oper));
 293       break;
 294
 295    case ast_conditional:
 296       subexpressions[0]->print();
 297       printf("? ");
 298       subexpressions[1]->print();
 299       printf(": ");
 300       subexpressions[1]->print();
 301       break;
 302
 303    case ast_array_index:
 304       subexpressions[0]->print();
 305       printf("[ ");
 306       subexpressions[1]->print();
 307       printf("] ");
 308       break;
 309
 310    case ast_function_call: {
 311       subexpressions[0]->print();
 312       printf("( ");
 313
 314       foreach_list_const (n, &this->expressions) {
 315          if (n != this->expressions.get_head())
 316             printf(", ");
 317
 318          ast_node *ast = exec_node_data(ast_node, n, link);
 319          ast->print();
 320       }
 321
 322       printf(") ");
 323       break;
 324    }
 325
 326    case ast_identifier:
 327       printf("%s ", primary_expression.identifier);
 328       break;
 329
 330    case ast_int_constant:
 331       printf("%d ", primary_expression.int_constant);
 332       break;
 333
 334    case ast_uint_constant:
 335       printf("%u ", primary_expression.uint_constant);
 336       break;
 337
 338    case ast_float_constant:
 339       printf("%f ", primary_expression.float_constant);
 340       break;
 341
 342    case ast_bool_constant:
 343       printf("%s ",
 344              primary_expression.bool_constant
 345              ? "true" : "false");
 346       break;
 347
 348    case ast_sequence: {
 349       printf("( ");
 350       foreach_list_const(n, & this->expressions) {
 351          if (n != this->expressions.get_head())
 352             printf(", ");
 353
 354          ast_node *ast = exec_node_data(ast_node, n, link);
 355          ast->print();
 356       }
 357       printf(") ");
 358       break;
 359    }
 360
 361    default:
 362       assert(0);
 363       break;
 364    }
 365 }
 366
 367 ast_expression::ast_expression(int oper,
 368                                ast_expression *ex0,
 369                                ast_expression *ex1,
 370                                ast_expression *ex2)
 371 {
 372    this->oper = ast_operators(oper);
 373    this->subexpressions[0] = ex0;
 374    this->subexpressions[1] = ex1;
 375    this->subexpressions[2] = ex2;
 376 }
 377
 378
 379 void
 380 ast_expression_statement::print(void) const
 381 {
 382    if (expression)
 383       expression->print();
 384
 385    printf("; ");
 386 }
 387
 388
 389 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
 390    expression(ex)
 391 {
 392    /* empty */
 393 }
 394
 395
 396 void
 397 ast_function::print(void) const
 398 {
 399    return_type->print();
 400    printf(" %s (", identifier);
 401
 402    foreach_list_const(n, & this->parameters) {
 403       ast_node *ast = exec_node_data(ast_node, n, link);
 404       ast->print();
 405    }
 406
 407    printf(")");
 408 }
 409
 410
 411 ast_function::ast_function(void)
 412    : is_definition(false), signature(NULL)
 413 {
 414    /* empty */
 415 }
 416
 417
 418 void
 419 ast_fully_specified_type::print(void) const
 420 {
 421    _mesa_ast_type_qualifier_print(& qualifier);
 422    specifier->print();
 423 }
 424
 425
 426 void
 427 ast_parameter_declarator::print(void) const
 428 {
 429    type->print();
 430    if (identifier)
 431       printf("%s ", identifier);
 432    ast_opt_array_size_print(is_array, array_size);
 433 }
 434
 435
 436 void
 437 ast_function_definition::print(void) const
 438 {
 439    prototype->print();
 440    body->print();
 441 }
 442
 443
 444 void
 445 ast_declaration::print(void) const
 446 {
 447    printf("%s ", identifier);
 448    ast_opt_array_size_print(is_array, array_size);
 449
 450    if (initializer) {
 451       printf("= ");
 452       initializer->print();
 453    }
 454 }
 455
 456
 457 ast_declaration::ast_declaration(char *identifier, int is_array,
 458                                  ast_expression *array_size,
 459                                  ast_expression *initializer)
 460 {
 461    this->identifier = identifier;
 462    this->is_array = is_array;
 463    this->array_size = array_size;
 464    this->initializer = initializer;
 465 }
 466
 467
 468 void
 469 ast_declarator_list::print(void) const
 470 {
 471    assert(type || invariant);
 472
 473    if (type)
 474       type->print();
 475    else
 476       printf("invariant ");
 477
 478    foreach_list_const (ptr, & this->declarations) {
 479       if (ptr != this->declarations.get_head())
 480          printf(", ");
 481
 482       ast_node *ast = exec_node_data(ast_node, ptr, link);
 483       ast->print();
 484    }
 485
 486    printf("; ");
 487 }
 488
 489
 490 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
 491 {
 492    this->type = type;
 493    this->invariant = false;
 494 }
 495
 496 void
 497 ast_jump_statement::print(void) const
 498 {
 499    switch (mode) {
 500    case ast_continue:
 501       printf("continue; ");
 502       break;
 503    case ast_break:
 504       printf("break; ");
 505       break;
 506    case ast_return:
 507       printf("return ");
 508       if (opt_return_value)
 509          opt_return_value->print();
 510
 511       printf("; ");
 512       break;
 513    case ast_discard:
 514       printf("discard; ");
 515       break;
 516    }
 517 }
 518
 519
 520 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
 521 {
 522    this->mode = ast_jump_modes(mode);
 523
 524    if (mode == ast_return)
 525       opt_return_value = return_value;
 526 }
 527
 528
 529 void
 530 ast_selection_statement::print(void) const
 531 {
 532    printf("if ( ");
 533    condition->print();
 534    printf(") ");
 535
 536    then_statement->print();
 537
 538    if (else_statement) {
 539       printf("else ");
 540       else_statement->print();
 541    }
 542
 543 }
 544
 545
 546 ast_selection_statement::ast_selection_statement(ast_expression *condition,
 547                                                  ast_node *then_statement,
 548                                                  ast_node *else_statement)
 549 {
 550    this->condition = condition;
 551    this->then_statement = then_statement;
 552    this->else_statement = else_statement;
 553 }
 554
 555
 556 void
 557 ast_iteration_statement::print(void) const
 558 {
 559    switch (mode) {
 560    case ast_for:
 561       printf("for( ");
 562       if (init_statement)
 563          init_statement->print();
 564       printf("; ");
 565
 566       if (condition)
 567          condition->print();
 568       printf("; ");
 569
 570       if (rest_expression)
 571          rest_expression->print();
 572       printf(") ");
 573
 574       body->print();
 575       break;
 576
 577    case ast_while:
 578       printf("while ( ");
 579       if (condition)
 580          condition->print();
 581       printf(") ");
 582       body->print();
 583       break;
 584
 585    case ast_do_while:
 586       printf("do ");
 587       body->print();
 588       printf("while ( ");
 589       if (condition)
 590          condition->print();
 591       printf("); ");
 592       break;
 593    }
 594 }
 595
 596
 597 ast_iteration_statement::ast_iteration_statement(int mode,
 598                                                  ast_node *init,
 599                                                  ast_node *condition,
 600                                                  ast_expression *rest_expression,
 601                                                  ast_node *body)
 602 {
 603    this->mode = ast_iteration_modes(mode);
 604    this->init_statement = init;
 605    this->condition = condition;
 606    this->rest_expression = rest_expression;
 607    this->body = body;
 608 }
 609
 610
 611 void
 612 ast_struct_specifier::print(void) const
 613 {
 614    printf("struct %s { ", name);
 615    foreach_list_const(n, &this->declarations) {
 616       ast_node *ast = exec_node_data(ast_node, n, link);
 617       ast->print();
 618    }
 619    printf("} ");
 620 }
 621
 622
 623 ast_struct_specifier::ast_struct_specifier(char *identifier,
 624                                            ast_node *declarator_list)
 625 {
 626    name = identifier;
 627    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
 628 }