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 }
  31
  32 #include "ast.h"
  33 #include "glsl_parser_extras.h"
  34 #include "glsl_parser.h"
  35
  36 const char *
  37 _mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target)
  38 {
  39    switch (target) {
  40    case vertex_shader:   return "vertex";
  41    case fragment_shader: return "fragment";
  42    case geometry_shader: return "geometry";
  43    case ir_shader:       break;
  44    }
  45
  46    assert(!"Should not get here.");
  47 }
  48
  49
  50 void
  51 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
  52                  const char *fmt, ...)
  53 {
  54    va_list ap;
  55
  56    state->error = true;
  57
  58    assert(state->info_log != NULL);
  59    state->info_log = talloc_asprintf_append(state->info_log,
  60                                             "%u:%u(%u): error: ",
  61                                             locp->source,
  62                                             locp->first_line,
  63                                             locp->first_column);
  64    va_start(ap, fmt);
  65    state->info_log = talloc_vasprintf_append(state->info_log, fmt, ap);
  66    va_end(ap);
  67    state->info_log = talloc_strdup_append(state->info_log, "\n");
  68 }
  69
  70
  71 void
  72 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
  73                    const char *fmt, ...)
  74 {
  75    va_list ap;
  76
  77    assert(state->info_log != NULL);
  78    state->info_log = talloc_asprintf_append(state->info_log,
  79                                             "%u:%u(%u): warning: ",
  80                                             locp->source,
  81                                             locp->first_line,
  82                                             locp->first_column);
  83    va_start(ap, fmt);
  84    state->info_log = talloc_vasprintf_append(state->info_log, fmt, ap);
  85    va_end(ap);
  86    state->info_log = talloc_strdup_append(state->info_log, "\n");
  87 }
  88
  89
  90 bool
  91 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
  92                              const char *behavior, YYLTYPE *behavior_locp,
  93                              _mesa_glsl_parse_state *state)
  94 {
  95    enum {
  96       extension_disable,
  97       extension_enable,
  98       extension_require,
  99       extension_warn
 100    } ext_mode;
 101
 102    if (strcmp(behavior, "warn") == 0) {
 103       ext_mode = extension_warn;
 104    } else if (strcmp(behavior, "require") == 0) {
 105       ext_mode = extension_require;
 106    } else if (strcmp(behavior, "enable") == 0) {
 107       ext_mode = extension_enable;
 108    } else if (strcmp(behavior, "disable") == 0) {
 109       ext_mode = extension_disable;
 110    } else {
 111       _mesa_glsl_error(behavior_locp, state,
 112                        "Unknown extension behavior `%s'",
 113                        behavior);
 114       return false;
 115    }
 116
 117    bool unsupported = false;
 118
 119    if (strcmp(name, "all") == 0) {
 120       if ((ext_mode == extension_enable) || (ext_mode == extension_require)) {
 121          _mesa_glsl_error(name_locp, state, "Cannot %s all extensions",
 122                           (ext_mode == extension_enable)
 123                           ? "enable" : "require");
 124          return false;
 125       }
 126    } else if (strcmp(name, "GL_ARB_draw_buffers") == 0) {
 127       /* This extension is only supported in fragment shaders.
 128        */
 129       if (state->target != fragment_shader) {
 130          unsupported = true;
 131       } else {
 132          state->ARB_draw_buffers_enable = (ext_mode != extension_disable);
 133          state->ARB_draw_buffers_warn = (ext_mode == extension_warn);
 134       }
 135    } else if (strcmp(name, "GL_ARB_texture_rectangle") == 0) {
 136       state->ARB_texture_rectangle_enable = (ext_mode != extension_disable);
 137       state->ARB_texture_rectangle_warn = (ext_mode == extension_warn);
 138    } else {
 139       unsupported = true;
 140    }
 141
 142    if (unsupported) {
 143       static const char *const fmt = "extension `%s' unsupported in %s shader";
 144
 145       if (ext_mode == extension_require) {
 146          _mesa_glsl_error(name_locp, state, fmt,
 147                           name, _mesa_glsl_shader_target_name(state->target));
 148          return false;
 149       } else {
 150          _mesa_glsl_warning(name_locp, state, fmt,
 151                             name, _mesa_glsl_shader_target_name(state->target));
 152       }
 153    }
 154
 155    return true;
 156 }
 157
 158
 159 ast_node::~ast_node()
 160 {
 161    /* empty */
 162 }
 163
 164
 165 void
 166 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
 167 {
 168    if (q->constant)
 169       printf("const ");
 170
 171    if (q->invariant)
 172       printf("invariant ");
 173
 174    if (q->attribute)
 175       printf("attribute ");
 176
 177    if (q->varying)
 178       printf("varying ");
 179
 180    if (q->in && q->out)
 181       printf("inout ");
 182    else {
 183       if (q->in)
 184          printf("in ");
 185
 186       if (q->out)
 187          printf("out ");
 188    }
 189
 190    if (q->centroid)
 191       printf("centroid ");
 192    if (q->uniform)
 193       printf("uniform ");
 194    if (q->smooth)
 195       printf("smooth ");
 196    if (q->flat)
 197       printf("flat ");
 198    if (q->noperspective)
 199       printf("noperspective ");
 200 }
 201
 202
 203 void
 204 ast_node::print(void) const
 205 {
 206    printf("unhandled node ");
 207 }
 208
 209
 210 ast_node::ast_node(void)
 211 {
 212    /* empty */
 213 }
 214
 215
 216 static void
 217 ast_opt_array_size_print(bool is_array, const ast_expression *array_size)
 218 {
 219    if (is_array) {
 220       printf("[ ");
 221
 222       if (array_size)
 223          array_size->print();
 224
 225       printf("] ");
 226    }
 227 }
 228
 229
 230 void
 231 ast_compound_statement::print(void) const
 232 {
 233    printf("{\n");
 234
 235    foreach_list_const(n, &this->statements) {
 236       ast_node *ast = exec_node_data(ast_node, n, link);
 237       ast->print();
 238    }
 239
 240    printf("}\n");
 241 }
 242
 243
 244 ast_compound_statement::ast_compound_statement(int new_scope,
 245                                                ast_node *statements)
 246 {
 247    this->new_scope = new_scope;
 248
 249    if (statements != NULL) {
 250       this->statements.push_degenerate_list_at_head(&statements->link);
 251    }
 252 }
 253
 254
 255 void
 256 ast_expression::print(void) const
 257 {
 258    switch (oper) {
 259    case ast_assign:
 260    case ast_mul_assign:
 261    case ast_div_assign:
 262    case ast_mod_assign:
 263    case ast_add_assign:
 264    case ast_sub_assign:
 265    case ast_ls_assign:
 266    case ast_rs_assign:
 267    case ast_and_assign:
 268    case ast_xor_assign:
 269    case ast_or_assign:
 270       subexpressions[0]->print();
 271       printf("%s ", operator_string(oper));
 272       subexpressions[1]->print();
 273       break;
 274
 275    case ast_field_selection:
 276       subexpressions[0]->print();
 277       printf(". %s ", primary_expression.identifier);
 278       break;
 279
 280    case ast_plus:
 281    case ast_neg:
 282    case ast_bit_not:
 283    case ast_logic_not:
 284    case ast_pre_inc:
 285    case ast_pre_dec:
 286       printf("%s ", operator_string(oper));
 287       subexpressions[0]->print();
 288       break;
 289
 290    case ast_post_inc:
 291    case ast_post_dec:
 292       subexpressions[0]->print();
 293       printf("%s ", operator_string(oper));
 294       break;
 295
 296    case ast_conditional:
 297       subexpressions[0]->print();
 298       printf("? ");
 299       subexpressions[1]->print();
 300       printf(": ");
 301       subexpressions[1]->print();
 302       break;
 303
 304    case ast_array_index:
 305       subexpressions[0]->print();
 306       printf("[ ");
 307       subexpressions[1]->print();
 308       printf("] ");
 309       break;
 310
 311    case ast_function_call: {
 312       subexpressions[0]->print();
 313       printf("( ");
 314
 315       foreach_list_const (n, &this->expressions) {
 316          if (n != this->expressions.get_head())
 317             printf(", ");
 318
 319          ast_node *ast = exec_node_data(ast_node, n, link);
 320          ast->print();
 321       }
 322
 323       printf(") ");
 324       break;
 325    }
 326
 327    case ast_identifier:
 328       printf("%s ", primary_expression.identifier);
 329       break;
 330
 331    case ast_int_constant:
 332       printf("%d ", primary_expression.int_constant);
 333       break;
 334
 335    case ast_uint_constant:
 336       printf("%u ", primary_expression.uint_constant);
 337       break;
 338
 339    case ast_float_constant:
 340       printf("%f ", primary_expression.float_constant);
 341       break;
 342
 343    case ast_bool_constant:
 344       printf("%s ",
 345              primary_expression.bool_constant
 346              ? "true" : "false");
 347       break;
 348
 349    case ast_sequence: {
 350       printf("( ");
 351       foreach_list_const(n, & this->expressions) {
 352          if (n != this->expressions.get_head())
 353             printf(", ");
 354
 355          ast_node *ast = exec_node_data(ast_node, n, link);
 356          ast->print();
 357       }
 358       printf(") ");
 359       break;
 360    }
 361
 362    default:
 363       assert(0);
 364       break;
 365    }
 366 }
 367
 368 ast_expression::ast_expression(int oper,
 369                                ast_expression *ex0,
 370                                ast_expression *ex1,
 371                                ast_expression *ex2)
 372 {
 373    this->oper = ast_operators(oper);
 374    this->subexpressions[0] = ex0;
 375    this->subexpressions[1] = ex1;
 376    this->subexpressions[2] = ex2;
 377 }
 378
 379
 380 void
 381 ast_expression_statement::print(void) const
 382 {
 383    if (expression)
 384       expression->print();
 385
 386    printf("; ");
 387 }
 388
 389
 390 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
 391    expression(ex)
 392 {
 393    /* empty */
 394 }
 395
 396
 397 void
 398 ast_function::print(void) const
 399 {
 400    return_type->print();
 401    printf(" %s (", identifier);
 402
 403    foreach_list_const(n, & this->parameters) {
 404       ast_node *ast = exec_node_data(ast_node, n, link);
 405       ast->print();
 406    }
 407
 408    printf(")");
 409 }
 410
 411
 412 ast_function::ast_function(void)
 413    : is_definition(false), signature(NULL)
 414 {
 415    /* empty */
 416 }
 417
 418
 419 void
 420 ast_fully_specified_type::print(void) const
 421 {
 422    _mesa_ast_type_qualifier_print(& qualifier);
 423    specifier->print();
 424 }
 425
 426
 427 void
 428 ast_parameter_declarator::print(void) const
 429 {
 430    type->print();
 431    if (identifier)
 432       printf("%s ", identifier);
 433    ast_opt_array_size_print(is_array, array_size);
 434 }
 435
 436
 437 void
 438 ast_function_definition::print(void) const
 439 {
 440    prototype->print();
 441    body->print();
 442 }
 443
 444
 445 void
 446 ast_declaration::print(void) const
 447 {
 448    printf("%s ", identifier);
 449    ast_opt_array_size_print(is_array, array_size);
 450
 451    if (initializer) {
 452       printf("= ");
 453       initializer->print();
 454    }
 455 }
 456
 457
 458 ast_declaration::ast_declaration(char *identifier, int is_array,
 459                                  ast_expression *array_size,
 460                                  ast_expression *initializer)
 461 {
 462    this->identifier = identifier;
 463    this->is_array = is_array;
 464    this->array_size = array_size;
 465    this->initializer = initializer;
 466 }
 467
 468
 469 void
 470 ast_declarator_list::print(void) const
 471 {
 472    assert(type || invariant);
 473
 474    if (type)
 475       type->print();
 476    else
 477       printf("invariant ");
 478
 479    foreach_list_const (ptr, & this->declarations) {
 480       if (ptr != this->declarations.get_head())
 481          printf(", ");
 482
 483       ast_node *ast = exec_node_data(ast_node, ptr, link);
 484       ast->print();
 485    }
 486
 487    printf("; ");
 488 }
 489
 490
 491 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
 492 {
 493    this->type = type;
 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 }