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 }
  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 void
 159 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
 160 {
 161    if (q->constant)
 162       printf("const ");
 163
 164    if (q->invariant)
 165       printf("invariant ");
 166
 167    if (q->attribute)
 168       printf("attribute ");
 169
 170    if (q->varying)
 171       printf("varying ");
 172
 173    if (q->in && q->out)
 174       printf("inout ");
 175    else {
 176       if (q->in)
 177          printf("in ");
 178
 179       if (q->out)
 180          printf("out ");
 181    }
 182
 183    if (q->centroid)
 184       printf("centroid ");
 185    if (q->uniform)
 186       printf("uniform ");
 187    if (q->smooth)
 188       printf("smooth ");
 189    if (q->flat)
 190       printf("flat ");
 191    if (q->noperspective)
 192       printf("noperspective ");
 193 }
 194
 195
 196 void
 197 ast_node::print(void) const
 198 {
 199    printf("unhandled node ");
 200 }
 201
 202
 203 ast_node::ast_node(void)
 204 {
 205    /* empty */
 206 }
 207
 208
 209 static void
 210 ast_opt_array_size_print(bool is_array, const ast_expression *array_size)
 211 {
 212    if (is_array) {
 213       printf("[ ");
 214
 215       if (array_size)
 216          array_size->print();
 217
 218       printf("] ");
 219    }
 220 }
 221
 222
 223 void
 224 ast_compound_statement::print(void) const
 225 {
 226    printf("{\n");
 227
 228    foreach_list_const(n, &this->statements) {
 229       ast_node *ast = exec_node_data(ast_node, n, link);
 230       ast->print();
 231    }
 232
 233    printf("}\n");
 234 }
 235
 236
 237 ast_compound_statement::ast_compound_statement(int new_scope,
 238                                                ast_node *statements)
 239 {
 240    this->new_scope = new_scope;
 241
 242    if (statements != NULL) {
 243       this->statements.push_degenerate_list_at_head(&statements->link);
 244    }
 245 }
 246
 247
 248 void
 249 ast_expression::print(void) const
 250 {
 251    switch (oper) {
 252    case ast_assign:
 253    case ast_mul_assign:
 254    case ast_div_assign:
 255    case ast_mod_assign:
 256    case ast_add_assign:
 257    case ast_sub_assign:
 258    case ast_ls_assign:
 259    case ast_rs_assign:
 260    case ast_and_assign:
 261    case ast_xor_assign:
 262    case ast_or_assign:
 263       subexpressions[0]->print();
 264       printf("%s ", operator_string(oper));
 265       subexpressions[1]->print();
 266       break;
 267
 268    case ast_field_selection:
 269       subexpressions[0]->print();
 270       printf(". %s ", primary_expression.identifier);
 271       break;
 272
 273    case ast_plus:
 274    case ast_neg:
 275    case ast_bit_not:
 276    case ast_logic_not:
 277    case ast_pre_inc:
 278    case ast_pre_dec:
 279       printf("%s ", operator_string(oper));
 280       subexpressions[0]->print();
 281       break;
 282
 283    case ast_post_inc:
 284    case ast_post_dec:
 285       subexpressions[0]->print();
 286       printf("%s ", operator_string(oper));
 287       break;
 288
 289    case ast_conditional:
 290       subexpressions[0]->print();
 291       printf("? ");
 292       subexpressions[1]->print();
 293       printf(": ");
 294       subexpressions[1]->print();
 295       break;
 296
 297    case ast_array_index:
 298       subexpressions[0]->print();
 299       printf("[ ");
 300       subexpressions[1]->print();
 301       printf("] ");
 302       break;
 303
 304    case ast_function_call: {
 305       subexpressions[0]->print();
 306       printf("( ");
 307
 308       foreach_list_const (n, &this->expressions) {
 309          if (n != this->expressions.get_head())
 310             printf(", ");
 311
 312          ast_node *ast = exec_node_data(ast_node, n, link);
 313          ast->print();
 314       }
 315
 316       printf(") ");
 317       break;
 318    }
 319
 320    case ast_identifier:
 321       printf("%s ", primary_expression.identifier);
 322       break;
 323
 324    case ast_int_constant:
 325       printf("%d ", primary_expression.int_constant);
 326       break;
 327
 328    case ast_uint_constant:
 329       printf("%u ", primary_expression.uint_constant);
 330       break;
 331
 332    case ast_float_constant:
 333       printf("%f ", primary_expression.float_constant);
 334       break;
 335
 336    case ast_bool_constant:
 337       printf("%s ",
 338              primary_expression.bool_constant
 339              ? "true" : "false");
 340       break;
 341
 342    case ast_sequence: {
 343       printf("( ");
 344       foreach_list_const(n, & this->expressions) {
 345          if (n != this->expressions.get_head())
 346             printf(", ");
 347
 348          ast_node *ast = exec_node_data(ast_node, n, link);
 349          ast->print();
 350       }
 351       printf(") ");
 352       break;
 353    }
 354
 355    default:
 356       assert(0);
 357       break;
 358    }
 359 }
 360
 361 ast_expression::ast_expression(int oper,
 362                                ast_expression *ex0,
 363                                ast_expression *ex1,
 364                                ast_expression *ex2)
 365 {
 366    this->oper = ast_operators(oper);
 367    this->subexpressions[0] = ex0;
 368    this->subexpressions[1] = ex1;
 369    this->subexpressions[2] = ex2;
 370 }
 371
 372
 373 void
 374 ast_expression_statement::print(void) const
 375 {
 376    if (expression)
 377       expression->print();
 378
 379    printf("; ");
 380 }
 381
 382
 383 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
 384    expression(ex)
 385 {
 386    /* empty */
 387 }
 388
 389
 390 void
 391 ast_function::print(void) const
 392 {
 393    return_type->print();
 394    printf(" %s (", identifier);
 395
 396    foreach_list_const(n, & this->parameters) {
 397       ast_node *ast = exec_node_data(ast_node, n, link);
 398       ast->print();
 399    }
 400
 401    printf(")");
 402 }
 403
 404
 405 ast_function::ast_function(void)
 406    : is_definition(false), signature(NULL)
 407 {
 408    /* empty */
 409 }
 410
 411
 412 void
 413 ast_fully_specified_type::print(void) const
 414 {
 415    _mesa_ast_type_qualifier_print(& qualifier);
 416    specifier->print();
 417 }
 418
 419
 420 void
 421 ast_parameter_declarator::print(void) const
 422 {
 423    type->print();
 424    if (identifier)
 425       printf("%s ", identifier);
 426    ast_opt_array_size_print(is_array, array_size);
 427 }
 428
 429
 430 void
 431 ast_function_definition::print(void) const
 432 {
 433    prototype->print();
 434    body->print();
 435 }
 436
 437
 438 void
 439 ast_declaration::print(void) const
 440 {
 441    printf("%s ", identifier);
 442    ast_opt_array_size_print(is_array, array_size);
 443
 444    if (initializer) {
 445       printf("= ");
 446       initializer->print();
 447    }
 448 }
 449
 450
 451 ast_declaration::ast_declaration(char *identifier, int is_array,
 452                                  ast_expression *array_size,
 453                                  ast_expression *initializer)
 454 {
 455    this->identifier = identifier;
 456    this->is_array = is_array;
 457    this->array_size = array_size;
 458    this->initializer = initializer;
 459 }
 460
 461
 462 void
 463 ast_declarator_list::print(void) const
 464 {
 465    assert(type || invariant);
 466
 467    if (type)
 468       type->print();
 469    else
 470       printf("invariant ");
 471
 472    foreach_list_const (ptr, & this->declarations) {
 473       if (ptr != this->declarations.get_head())
 474          printf(", ");
 475
 476       ast_node *ast = exec_node_data(ast_node, ptr, link);
 477       ast->print();
 478    }
 479
 480    printf("; ");
 481 }
 482
 483
 484 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
 485 {
 486    this->type = type;
 487 }
 488
 489 void
 490 ast_jump_statement::print(void) const
 491 {
 492    switch (mode) {
 493    case ast_continue:
 494       printf("continue; ");
 495       break;
 496    case ast_break:
 497       printf("break; ");
 498       break;
 499    case ast_return:
 500       printf("return ");
 501       if (opt_return_value)
 502          opt_return_value->print();
 503
 504       printf("; ");
 505       break;
 506    case ast_discard:
 507       printf("discard; ");
 508       break;
 509    }
 510 }
 511
 512
 513 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
 514 {
 515    this->mode = ast_jump_modes(mode);
 516
 517    if (mode == ast_return)
 518       opt_return_value = return_value;
 519 }
 520
 521
 522 void
 523 ast_selection_statement::print(void) const
 524 {
 525    printf("if ( ");
 526    condition->print();
 527    printf(") ");
 528
 529    then_statement->print();
 530
 531    if (else_statement) {
 532       printf("else ");
 533       else_statement->print();
 534    }
 535
 536 }
 537
 538
 539 ast_selection_statement::ast_selection_statement(ast_expression *condition,
 540                                                  ast_node *then_statement,
 541                                                  ast_node *else_statement)
 542 {
 543    this->condition = condition;
 544    this->then_statement = then_statement;
 545    this->else_statement = else_statement;
 546 }
 547
 548
 549 void
 550 ast_iteration_statement::print(void) const
 551 {
 552    switch (mode) {
 553    case ast_for:
 554       printf("for( ");
 555       if (init_statement)
 556          init_statement->print();
 557       printf("; ");
 558
 559       if (condition)
 560          condition->print();
 561       printf("; ");
 562
 563       if (rest_expression)
 564          rest_expression->print();
 565       printf(") ");
 566
 567       body->print();
 568       break;
 569
 570    case ast_while:
 571       printf("while ( ");
 572       if (condition)
 573          condition->print();
 574       printf(") ");
 575       body->print();
 576       break;
 577
 578    case ast_do_while:
 579       printf("do ");
 580       body->print();
 581       printf("while ( ");
 582       if (condition)
 583          condition->print();
 584       printf("); ");
 585       break;
 586    }
 587 }
 588
 589
 590 ast_iteration_statement::ast_iteration_statement(int mode,
 591                                                  ast_node *init,
 592                                                  ast_node *condition,
 593                                                  ast_expression *rest_expression,
 594                                                  ast_node *body)
 595 {
 596    this->mode = ast_iteration_modes(mode);
 597    this->init_statement = init;
 598    this->condition = condition;
 599    this->rest_expression = rest_expression;
 600    this->body = body;
 601 }
 602
 603
 604 void
 605 ast_struct_specifier::print(void) const
 606 {
 607    printf("struct %s { ", name);
 608    foreach_list_const(n, &this->declarations) {
 609       ast_node *ast = exec_node_data(ast_node, n, link);
 610       ast->print();
 611    }
 612    printf("} ");
 613 }
 614
 615
 616 ast_struct_specifier::ast_struct_specifier(char *identifier,
 617                                            ast_node *declarator_list)
 618 {
 619    name = identifier;
 620    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
 621 }