11 #include "adt/error.h"
13 struct obstack ast_obstack;
18 /** If set, implicit casts are printed. */
19 bool print_implicit_casts = false;
21 /** If set parenthesis are printed to indicate operator precedence. */
22 bool print_parenthesis = false;
24 static void print_statement(const statement_t *statement);
25 static void print_expression_prec(const expression_t *expression, unsigned prec);
27 void change_indent(int delta)
33 void print_indent(void)
35 for(int i = 0; i < indent; ++i)
41 PREC_COMMA = 2, /* , left to right */
42 PREC_ASSIGN = 4, /* = += -= *= /= %= <<= >>= &= ^= |= right to left */
43 PREC_COND = 6, /* ?: right to left */
44 PREC_LOG_OR = 8, /* || left to right */
45 PREC_LOG_AND = 10, /* && left to right */
46 PREC_BIT_OR = 12, /* | left to right */
47 PREC_BIT_XOR = 14, /* ^ left to right */
48 PREC_BIT_AND = 16, /* & left to right */
49 PREC_EQ = 18, /* == != left to right */
50 PREC_CMP = 20, /* < <= > >= left to right */
51 PREC_SHF = 22, /* << >> left to right */
52 PREC_PLUS = 24, /* + - left to right */
53 PREC_MUL = 26, /* * / % left to right */
54 PREC_UNARY = 28, /* ! ~ ++ -- + - (type) * & sizeof right to left */
55 PREC_ACCESS = 30, /* () [] -> . left to right */
56 PREC_PRIM = 32, /* primary */
61 * Returns 1 if a given precedence level has right-to-left
62 * associativity, else -1.
64 * @param precedence the operator precedence
66 static int right_to_left(unsigned precedence) {
67 return (precedence == PREC_ASSIGN || precedence == PREC_COND ||
68 precedence == PREC_UNARY) ? 1 : -1;
72 * Return the precedence of an expression given by its kind.
74 * @param kind the expression kind
76 static unsigned get_expression_precedence(expression_kind_t kind)
78 static const unsigned prec[] = {
79 [EXPR_UNKNOWN] = PREC_PRIM,
80 [EXPR_INVALID] = PREC_PRIM,
81 [EXPR_REFERENCE] = PREC_PRIM,
82 [EXPR_CHAR_CONST] = PREC_PRIM,
83 [EXPR_CONST] = PREC_PRIM,
84 [EXPR_STRING_LITERAL] = PREC_PRIM,
85 [EXPR_WIDE_STRING_LITERAL] = PREC_PRIM,
86 [EXPR_CALL] = PREC_PRIM,
87 [EXPR_CONDITIONAL] = PREC_COND,
88 [EXPR_SELECT] = PREC_ACCESS,
89 [EXPR_ARRAY_ACCESS] = PREC_ACCESS,
90 [EXPR_SIZEOF] = PREC_UNARY,
91 [EXPR_CLASSIFY_TYPE] = PREC_UNARY,
92 [EXPR_ALIGNOF] = PREC_UNARY,
94 [EXPR_FUNCTION] = PREC_PRIM,
95 [EXPR_PRETTY_FUNCTION] = PREC_PRIM,
96 [EXPR_BUILTIN_SYMBOL] = PREC_PRIM,
97 [EXPR_BUILTIN_CONSTANT_P] = PREC_PRIM,
98 [EXPR_BUILTIN_PREFETCH] = PREC_PRIM,
99 [EXPR_OFFSETOF] = PREC_PRIM,
100 [EXPR_VA_START] = PREC_PRIM,
101 [EXPR_VA_ARG] = PREC_PRIM,
102 [EXPR_STATEMENT] = PREC_ACCESS,
104 [EXPR_UNARY_NEGATE] = PREC_UNARY,
105 [EXPR_UNARY_PLUS] = PREC_UNARY,
106 [EXPR_UNARY_BITWISE_NEGATE] = PREC_UNARY,
107 [EXPR_UNARY_NOT] = PREC_UNARY,
108 [EXPR_UNARY_DEREFERENCE] = PREC_UNARY,
109 [EXPR_UNARY_TAKE_ADDRESS] = PREC_UNARY,
110 [EXPR_UNARY_POSTFIX_INCREMENT] = PREC_UNARY,
111 [EXPR_UNARY_POSTFIX_DECREMENT] = PREC_UNARY,
112 [EXPR_UNARY_PREFIX_INCREMENT] = PREC_UNARY,
113 [EXPR_UNARY_PREFIX_DECREMENT] = PREC_UNARY,
114 [EXPR_UNARY_CAST] = PREC_UNARY,
115 [EXPR_UNARY_CAST_IMPLICIT] = PREC_UNARY,
116 [EXPR_UNARY_ASSUME] = PREC_PRIM,
117 [EXPR_UNARY_BITFIELD_EXTRACT] = PREC_ACCESS,
119 [EXPR_BINARY_ADD] = PREC_PLUS,
120 [EXPR_BINARY_SUB] = PREC_PLUS,
121 [EXPR_BINARY_MUL] = PREC_MUL,
122 [EXPR_BINARY_DIV] = PREC_MUL,
123 [EXPR_BINARY_MOD] = PREC_MUL,
124 [EXPR_BINARY_EQUAL] = PREC_EQ,
125 [EXPR_BINARY_NOTEQUAL] = PREC_EQ,
126 [EXPR_BINARY_LESS] = PREC_CMP,
127 [EXPR_BINARY_LESSEQUAL] = PREC_CMP,
128 [EXPR_BINARY_GREATER] = PREC_CMP,
129 [EXPR_BINARY_GREATEREQUAL] = PREC_CMP,
130 [EXPR_BINARY_BITWISE_AND] = PREC_BIT_AND,
131 [EXPR_BINARY_BITWISE_OR] = PREC_BIT_OR,
132 [EXPR_BINARY_BITWISE_XOR] = PREC_BIT_XOR,
133 [EXPR_BINARY_LOGICAL_AND] = PREC_LOG_AND,
134 [EXPR_BINARY_LOGICAL_OR] = PREC_LOG_OR,
135 [EXPR_BINARY_SHIFTLEFT] = PREC_SHF,
136 [EXPR_BINARY_SHIFTRIGHT] = PREC_SHF,
137 [EXPR_BINARY_ASSIGN] = PREC_ASSIGN,
138 [EXPR_BINARY_MUL_ASSIGN] = PREC_ASSIGN,
139 [EXPR_BINARY_DIV_ASSIGN] = PREC_ASSIGN,
140 [EXPR_BINARY_MOD_ASSIGN] = PREC_ASSIGN,
141 [EXPR_BINARY_ADD_ASSIGN] = PREC_ASSIGN,
142 [EXPR_BINARY_SUB_ASSIGN] = PREC_ASSIGN,
143 [EXPR_BINARY_SHIFTLEFT_ASSIGN] = PREC_ASSIGN,
144 [EXPR_BINARY_SHIFTRIGHT_ASSIGN] = PREC_ASSIGN,
145 [EXPR_BINARY_BITWISE_AND_ASSIGN] = PREC_ASSIGN,
146 [EXPR_BINARY_BITWISE_XOR_ASSIGN] = PREC_ASSIGN,
147 [EXPR_BINARY_BITWISE_OR_ASSIGN] = PREC_ASSIGN,
148 [EXPR_BINARY_COMMA] = PREC_COMMA,
150 [EXPR_BINARY_BUILTIN_EXPECT] = PREC_PRIM,
151 [EXPR_BINARY_ISGREATER] = PREC_PRIM,
152 [EXPR_BINARY_ISGREATEREQUAL] = PREC_PRIM,
153 [EXPR_BINARY_ISLESS] = PREC_PRIM,
154 [EXPR_BINARY_ISLESSEQUAL] = PREC_PRIM,
155 [EXPR_BINARY_ISLESSGREATER] = PREC_PRIM,
156 [EXPR_BINARY_ISUNORDERED] = PREC_PRIM
159 if ((unsigned)kind >= (sizeof(prec)/sizeof(prec[0]))) {
160 panic("wrong expression kind");
162 unsigned res = prec[kind];
163 if (res == PREC_BOTTOM) {
164 panic("expression kind not defined in get_expression_precedence()");
171 * Print a constant expression.
173 * @param cnst the constant expression
175 static void print_const(const const_expression_t *cnst)
177 if(cnst->base.type == NULL)
180 const type_t *const type = skip_typeref(cnst->base.type);
182 if (is_type_integer(type)) {
183 fprintf(out, "%lld", cnst->v.int_value);
184 } else if (is_type_float(type)) {
185 fprintf(out, "%Lf", cnst->v.float_value);
187 panic("unknown constant");
192 * Print a quoted string constant.
194 * @param string the string constant
195 * @param border the border char
197 static void print_quoted_string(const string_t *const string, char border)
200 const char *end = string->begin + string->size;
201 for (const char *c = string->begin; c != end; ++c) {
206 case '\\': fputs("\\\\", out); break;
207 case '\a': fputs("\\a", out); break;
208 case '\b': fputs("\\b", out); break;
209 case '\f': fputs("\\f", out); break;
210 case '\n': fputs("\\n", out); break;
211 case '\r': fputs("\\r", out); break;
212 case '\t': fputs("\\t", out); break;
213 case '\v': fputs("\\v", out); break;
214 case '\?': fputs("\\?", out); break;
217 fprintf(out, "\\%03o", *c);
228 * Print a constant character expression.
230 * @param cnst the constant character expression
232 static void print_char_const(const const_expression_t *cnst)
234 print_quoted_string(&cnst->v.chars, '\'');
238 * Prints a string literal expression.
240 * @param string_literal the string literal expression
242 static void print_string_literal(
243 const string_literal_expression_t *string_literal)
245 print_quoted_string(&string_literal->value, '"');
249 * Prints a wide string literal expression.
251 * @param wstr the wide string literal expression
253 static void print_wide_string_literal(
254 const wide_string_literal_expression_t *const wstr)
257 for (const wchar_rep_t *c = wstr->value.begin,
258 *end = c + wstr->value.size;
261 case L'\"': fputs("\\\"", out); break;
262 case L'\\': fputs("\\\\", out); break;
263 case L'\a': fputs("\\a", out); break;
264 case L'\b': fputs("\\b", out); break;
265 case L'\f': fputs("\\f", out); break;
266 case L'\n': fputs("\\n", out); break;
267 case L'\r': fputs("\\r", out); break;
268 case L'\t': fputs("\\t", out); break;
269 case L'\v': fputs("\\v", out); break;
270 case L'\?': fputs("\\?", out); break;
272 const unsigned tc = *c;
275 fprintf(out, "\\%03o", (char)*c);
279 } else if (tc < 0x800) {
280 fputc(0xC0 | (tc >> 6), out);
281 fputc(0x80 | (tc & 0x3F), out);
282 } else if (tc < 0x10000) {
283 fputc(0xE0 | ( tc >> 12), out);
284 fputc(0x80 | ((tc >> 6) & 0x3F), out);
285 fputc(0x80 | ( tc & 0x3F), out);
287 fputc(0xF0 | ( tc >> 18), out);
288 fputc(0x80 | ((tc >> 12) & 0x3F), out);
289 fputc(0x80 | ((tc >> 6) & 0x3F), out);
290 fputc(0x80 | ( tc & 0x3F), out);
299 * Prints a call expression.
301 * @param call the call expression
303 static void print_call_expression(const call_expression_t *call)
305 unsigned prec = get_expression_precedence(call->base.kind);
306 print_expression_prec(call->function, prec);
308 call_argument_t *argument = call->arguments;
310 while(argument != NULL) {
316 print_expression_prec(argument->expression, PREC_COMMA + 1);
318 argument = argument->next;
324 * Prints a binary expression.
326 * @param binexpr the binary expression
328 static void print_binary_expression(const binary_expression_t *binexpr)
330 unsigned prec = get_expression_precedence(binexpr->base.kind);
331 int r2l = right_to_left(prec);
333 if(binexpr->base.kind == EXPR_BINARY_BUILTIN_EXPECT) {
334 fputs("__builtin_expect(", out);
335 print_expression_prec(binexpr->left, prec);
337 print_expression_prec(binexpr->right, prec);
342 print_expression_prec(binexpr->left, prec + r2l);
343 if (binexpr->base.kind != EXPR_BINARY_COMMA) {
346 switch (binexpr->base.kind) {
347 case EXPR_BINARY_COMMA: fputs(",", out); break;
348 case EXPR_BINARY_ASSIGN: fputs("=", out); break;
349 case EXPR_BINARY_ADD: fputs("+", out); break;
350 case EXPR_BINARY_SUB: fputs("-", out); break;
351 case EXPR_BINARY_MUL: fputs("*", out); break;
352 case EXPR_BINARY_MOD: fputs("%", out); break;
353 case EXPR_BINARY_DIV: fputs("/", out); break;
354 case EXPR_BINARY_BITWISE_OR: fputs("|", out); break;
355 case EXPR_BINARY_BITWISE_AND: fputs("&", out); break;
356 case EXPR_BINARY_BITWISE_XOR: fputs("^", out); break;
357 case EXPR_BINARY_LOGICAL_OR: fputs("||", out); break;
358 case EXPR_BINARY_LOGICAL_AND: fputs("&&", out); break;
359 case EXPR_BINARY_NOTEQUAL: fputs("!=", out); break;
360 case EXPR_BINARY_EQUAL: fputs("==", out); break;
361 case EXPR_BINARY_LESS: fputs("<", out); break;
362 case EXPR_BINARY_LESSEQUAL: fputs("<=", out); break;
363 case EXPR_BINARY_GREATER: fputs(">", out); break;
364 case EXPR_BINARY_GREATEREQUAL: fputs(">=", out); break;
365 case EXPR_BINARY_SHIFTLEFT: fputs("<<", out); break;
366 case EXPR_BINARY_SHIFTRIGHT: fputs(">>", out); break;
368 case EXPR_BINARY_ADD_ASSIGN: fputs("+=", out); break;
369 case EXPR_BINARY_SUB_ASSIGN: fputs("-=", out); break;
370 case EXPR_BINARY_MUL_ASSIGN: fputs("*=", out); break;
371 case EXPR_BINARY_MOD_ASSIGN: fputs("%=", out); break;
372 case EXPR_BINARY_DIV_ASSIGN: fputs("/=", out); break;
373 case EXPR_BINARY_BITWISE_OR_ASSIGN: fputs("|=", out); break;
374 case EXPR_BINARY_BITWISE_AND_ASSIGN: fputs("&=", out); break;
375 case EXPR_BINARY_BITWISE_XOR_ASSIGN: fputs("^=", out); break;
376 case EXPR_BINARY_SHIFTLEFT_ASSIGN: fputs("<<=", out); break;
377 case EXPR_BINARY_SHIFTRIGHT_ASSIGN: fputs(">>=", out); break;
378 default: panic("invalid binexpression found");
381 print_expression_prec(binexpr->right, prec - r2l);
385 * Prints an unary expression.
387 * @param unexpr the unary expression
389 static void print_unary_expression(const unary_expression_t *unexpr)
391 unsigned prec = get_expression_precedence(unexpr->base.kind);
392 switch(unexpr->base.kind) {
393 case EXPR_UNARY_NEGATE: fputs("-", out); break;
394 case EXPR_UNARY_PLUS: fputs("+", out); break;
395 case EXPR_UNARY_NOT: fputs("!", out); break;
396 case EXPR_UNARY_BITWISE_NEGATE: fputs("~", out); break;
397 case EXPR_UNARY_PREFIX_INCREMENT: fputs("++", out); break;
398 case EXPR_UNARY_PREFIX_DECREMENT: fputs("--", out); break;
399 case EXPR_UNARY_DEREFERENCE: fputs("*", out); break;
400 case EXPR_UNARY_TAKE_ADDRESS: fputs("&", out); break;
402 case EXPR_UNARY_BITFIELD_EXTRACT:
403 print_expression_prec(unexpr->value, prec);
406 case EXPR_UNARY_POSTFIX_INCREMENT:
407 print_expression_prec(unexpr->value, prec);
410 case EXPR_UNARY_POSTFIX_DECREMENT:
411 print_expression_prec(unexpr->value, prec);
414 case EXPR_UNARY_CAST_IMPLICIT:
415 if(!print_implicit_casts) {
416 print_expression_prec(unexpr->value, prec);
420 case EXPR_UNARY_CAST:
422 print_type(unexpr->base.type);
425 case EXPR_UNARY_ASSUME:
426 fputs("__assume(", out);
427 print_expression_prec(unexpr->value, PREC_COMMA + 1);
431 panic("invalid unary expression found");
433 print_expression_prec(unexpr->value, prec);
437 * Prints a reference expression.
439 * @param ref the reference expression
441 static void print_reference_expression(const reference_expression_t *ref)
443 fprintf(out, "%s", ref->declaration->symbol->string);
447 * Prints an array expression.
449 * @param expression the array expression
451 static void print_array_expression(const array_access_expression_t *expression)
453 unsigned prec = get_expression_precedence(expression->base.kind);
454 if(!expression->flipped) {
455 print_expression_prec(expression->array_ref, prec);
457 print_expression_prec(expression->index, prec);
460 print_expression_prec(expression->index, prec);
462 print_expression_prec(expression->array_ref, prec);
468 * Prints a typeproperty expression (sizeof or __alignof__).
470 * @param expression the type property expression
472 static void print_typeprop_expression(const typeprop_expression_t *expression)
474 if (expression->base.kind == EXPR_SIZEOF) {
475 fputs("sizeof", out);
477 assert(expression->base.kind == EXPR_ALIGNOF);
478 fputs("__alignof__", out);
480 if(expression->tp_expression != NULL) {
481 /* always print the '()' here, sizeof x is right but unusual */
483 print_expression_prec(expression->tp_expression, PREC_ACCESS);
487 print_type(expression->type);
493 * Prints an builtin symbol.
495 * @param expression the builtin symbol expression
497 static void print_builtin_symbol(const builtin_symbol_expression_t *expression)
499 fputs(expression->symbol->string, out);
503 * Prints a builtin constant expression.
505 * @param expression the builtin constant expression
507 static void print_builtin_constant(const builtin_constant_expression_t *expression)
509 fputs("__builtin_constant_p(", out);
510 print_expression_prec(expression->value, PREC_COMMA + 1);
515 * Prints a builtin prefetch expression.
517 * @param expression the builtin prefetch expression
519 static void print_builtin_prefetch(const builtin_prefetch_expression_t *expression)
521 fputs("__builtin_prefetch(", out);
522 print_expression_prec(expression->adr, PREC_COMMA + 1);
523 if (expression->rw) {
525 print_expression_prec(expression->rw, PREC_COMMA + 1);
527 if (expression->locality) {
529 print_expression_prec(expression->locality, PREC_COMMA + 1);
535 * Prints a conditional expression.
537 * @param expression the conditional expression
539 static void print_conditional(const conditional_expression_t *expression)
541 unsigned prec = get_expression_precedence(expression->base.kind);
543 print_expression_prec(expression->condition, prec);
545 print_expression_prec(expression->true_expression, prec);
547 print_expression_prec(expression->false_expression, prec);
552 * Prints a va_start expression.
554 * @param expression the va_start expression
556 static void print_va_start(const va_start_expression_t *const expression)
558 fputs("__builtin_va_start(", out);
559 print_expression_prec(expression->ap, PREC_COMMA + 1);
561 fputs(expression->parameter->symbol->string, out);
566 * Prints a va_arg expression.
568 * @param expression the va_arg expression
570 static void print_va_arg(const va_arg_expression_t *expression)
572 fputs("__builtin_va_arg(", out);
573 print_expression_prec(expression->ap, PREC_COMMA + 1);
575 print_type(expression->base.type);
580 * Prints a select expression (. or ->).
582 * @param expression the select expression
584 static void print_select(const select_expression_t *expression)
586 unsigned prec = get_expression_precedence(expression->base.kind);
587 print_expression_prec(expression->compound, prec);
588 if(expression->compound->base.type == NULL ||
589 expression->compound->base.type->kind == TYPE_POINTER) {
594 fputs(expression->symbol->string, out);
598 * Prints a type classify expression.
600 * @param expr the type classify expression
602 static void print_classify_type_expression(
603 const classify_type_expression_t *const expr)
605 fputs("__builtin_classify_type(", out);
606 print_expression_prec(expr->type_expression, PREC_COMMA + 1);
611 * Prints a designator.
613 * @param designator the designator
615 static void print_designator(const designator_t *designator)
617 fputs(designator->symbol->string, out);
618 for (designator = designator->next; designator != NULL; designator = designator->next) {
619 if (designator->array_access) {
621 print_expression_prec(designator->array_access, PREC_ACCESS);
625 fputs(designator->symbol->string, out);
631 * Prints an offsetof expression.
633 * @param expression the offset expression
635 static void print_offsetof_expression(const offsetof_expression_t *expression)
637 fputs("__builtin_offsetof", out);
639 print_type(expression->type);
641 print_designator(expression->designator);
646 * Prints a statement expression.
648 * @param expression the statement expression
650 static void print_statement_expression(const statement_expression_t *expression)
653 print_statement(expression->statement);
658 * Prints an expression with parenthesis if needed.
660 * @param expression the expression to print
661 * @param top_prec the precedence of the user of this expression.
663 static void print_expression_prec(const expression_t *expression, unsigned top_prec)
665 unsigned prec = get_expression_precedence(expression->base.kind);
666 if (print_parenthesis && top_prec != PREC_BOTTOM)
670 switch(expression->kind) {
673 fprintf(out, "*invalid expression*");
675 case EXPR_CHAR_CONST:
676 print_char_const(&expression->conste);
679 print_const(&expression->conste);
682 case EXPR_PRETTY_FUNCTION:
683 case EXPR_STRING_LITERAL:
684 print_string_literal(&expression->string);
686 case EXPR_WIDE_STRING_LITERAL:
687 print_wide_string_literal(&expression->wide_string);
690 print_call_expression(&expression->call);
693 print_binary_expression(&expression->binary);
696 print_reference_expression(&expression->reference);
698 case EXPR_ARRAY_ACCESS:
699 print_array_expression(&expression->array_access);
702 print_unary_expression(&expression->unary);
706 print_typeprop_expression(&expression->typeprop);
708 case EXPR_BUILTIN_SYMBOL:
709 print_builtin_symbol(&expression->builtin_symbol);
711 case EXPR_BUILTIN_CONSTANT_P:
712 print_builtin_constant(&expression->builtin_constant);
714 case EXPR_BUILTIN_PREFETCH:
715 print_builtin_prefetch(&expression->builtin_prefetch);
717 case EXPR_CONDITIONAL:
718 print_conditional(&expression->conditional);
721 print_va_start(&expression->va_starte);
724 print_va_arg(&expression->va_arge);
727 print_select(&expression->select);
729 case EXPR_CLASSIFY_TYPE:
730 print_classify_type_expression(&expression->classify_type);
733 print_offsetof_expression(&expression->offsetofe);
736 print_statement_expression(&expression->statement);
741 fprintf(out, "some expression of type %d", (int) expression->kind);
749 * Print an compound statement.
751 * @param block the compound statement
753 static void print_compound_statement(const compound_statement_t *block)
758 statement_t *statement = block->statements;
759 while(statement != NULL) {
760 if (statement->base.kind == STATEMENT_CASE_LABEL)
763 print_statement(statement);
765 statement = statement->base.next;
773 * Print a return statement.
775 * @param statement the return statement
777 static void print_return_statement(const return_statement_t *statement)
779 fprintf(out, "return ");
780 if(statement->value != NULL)
781 print_expression(statement->value);
786 * Print an expression statement.
788 * @param statement the expression statement
790 static void print_expression_statement(const expression_statement_t *statement)
792 print_expression(statement->expression);
797 * Print a goto statement.
799 * @param statement the goto statement
801 static void print_goto_statement(const goto_statement_t *statement)
803 fprintf(out, "goto ");
804 fputs(statement->label->symbol->string, out);
805 fprintf(stderr, "(%p)", (void*) statement->label);
810 * Print a label statement.
812 * @param statement the label statement
814 static void print_label_statement(const label_statement_t *statement)
816 fprintf(stderr, "(%p)", (void*) statement->label);
817 fprintf(out, "%s:\n", statement->label->symbol->string);
818 if(statement->statement != NULL) {
819 print_statement(statement->statement);
824 * Print an if statement.
826 * @param statement the if statement
828 static void print_if_statement(const if_statement_t *statement)
831 print_expression(statement->condition);
833 if(statement->true_statement != NULL) {
834 print_statement(statement->true_statement);
837 if(statement->false_statement != NULL) {
840 print_statement(statement->false_statement);
845 * Print a switch statement.
847 * @param statement the switch statement
849 static void print_switch_statement(const switch_statement_t *statement)
851 fputs("switch(", out);
852 print_expression(statement->expression);
854 print_statement(statement->body);
858 * Print a case label (including the default label).
860 * @param statement the case label statement
862 static void print_case_label(const case_label_statement_t *statement)
864 if(statement->expression == NULL) {
865 fputs("default:\n", out);
868 print_expression(statement->expression);
869 if (statement->end_range != NULL) {
871 print_expression(statement->end_range);
876 if(statement->statement != NULL) {
877 if (statement->statement->base.kind == STATEMENT_CASE_LABEL) {
881 print_statement(statement->statement);
886 * Print a declaration statement.
888 * @param statement the statement
890 static void print_declaration_statement(
891 const declaration_statement_t *statement)
894 declaration_t *declaration = statement->declarations_begin;
895 for( ; declaration != statement->declarations_end->next;
896 declaration = declaration->next) {
902 print_declaration(declaration);
908 * Print a while statement.
910 * @param statement the statement
912 static void print_while_statement(const while_statement_t *statement)
914 fputs("while(", out);
915 print_expression(statement->condition);
917 print_statement(statement->body);
921 * Print a do-while statement.
923 * @param statement the statement
925 static void print_do_while_statement(const do_while_statement_t *statement)
928 print_statement(statement->body);
930 fputs("while(", out);
931 print_expression(statement->condition);
936 * Print a for statement.
938 * @param statement the statement
940 static void print_for_statement(const for_statement_t *statement)
943 if(statement->scope.declarations != NULL) {
944 assert(statement->initialisation == NULL);
945 print_declaration(statement->scope.declarations);
946 if(statement->scope.declarations->next != NULL) {
947 panic("multiple declarations in for statement not supported yet");
951 if(statement->initialisation) {
952 print_expression(statement->initialisation);
956 if(statement->condition != NULL) {
957 print_expression(statement->condition);
960 if(statement->step != NULL) {
961 print_expression(statement->step);
964 print_statement(statement->body);
968 * Print assembler constraints.
970 * @param constraints the constraints
972 static void print_asm_constraints(asm_constraint_t *constraints)
974 asm_constraint_t *constraint = constraints;
975 for( ; constraint != NULL; constraint = constraint->next) {
976 if(constraint != constraints)
979 if(constraint->symbol) {
980 fprintf(out, "[%s] ", constraint->symbol->string);
982 print_quoted_string(&constraint->constraints, '"');
984 print_expression(constraint->expression);
990 * Print assembler clobbers.
992 * @param clobbers the clobbers
994 static void print_asm_clobbers(asm_clobber_t *clobbers)
996 asm_clobber_t *clobber = clobbers;
997 for( ; clobber != NULL; clobber = clobber->next) {
998 if(clobber != clobbers)
1001 print_quoted_string(&clobber->clobber, '"');
1006 * Print an assembler statement.
1008 * @param statement the statement
1010 static void print_asm_statement(const asm_statement_t *statement)
1013 if(statement->is_volatile) {
1014 fputs("volatile ", out);
1017 print_quoted_string(&statement->asm_text, '"');
1018 if(statement->inputs == NULL && statement->outputs == NULL
1019 && statement->clobbers == NULL)
1020 goto end_of_print_asm_statement;
1023 print_asm_constraints(statement->inputs);
1024 if(statement->outputs == NULL && statement->clobbers == NULL)
1025 goto end_of_print_asm_statement;
1028 print_asm_constraints(statement->outputs);
1029 if(statement->clobbers == NULL)
1030 goto end_of_print_asm_statement;
1033 print_asm_clobbers(statement->clobbers);
1035 end_of_print_asm_statement:
1040 * Print a statement.
1042 * @param statement the statement
1044 void print_statement(const statement_t *statement)
1046 switch(statement->kind) {
1047 case STATEMENT_COMPOUND:
1048 print_compound_statement(&statement->compound);
1050 case STATEMENT_RETURN:
1051 print_return_statement(&statement->returns);
1053 case STATEMENT_EXPRESSION:
1054 print_expression_statement(&statement->expression);
1056 case STATEMENT_LABEL:
1057 print_label_statement(&statement->label);
1059 case STATEMENT_GOTO:
1060 print_goto_statement(&statement->gotos);
1062 case STATEMENT_CONTINUE:
1063 fputs("continue;\n", out);
1065 case STATEMENT_BREAK:
1066 fputs("break;\n", out);
1069 print_if_statement(&statement->ifs);
1071 case STATEMENT_SWITCH:
1072 print_switch_statement(&statement->switchs);
1074 case STATEMENT_CASE_LABEL:
1075 print_case_label(&statement->case_label);
1077 case STATEMENT_DECLARATION:
1078 print_declaration_statement(&statement->declaration);
1080 case STATEMENT_WHILE:
1081 print_while_statement(&statement->whiles);
1083 case STATEMENT_DO_WHILE:
1084 print_do_while_statement(&statement->do_while);
1087 print_for_statement(&statement->fors);
1090 print_asm_statement(&statement->asms);
1092 case STATEMENT_INVALID:
1093 fprintf(out, "*invalid statement*");
1099 * Print a storage class.
1101 * @param storage_class the storage class
1103 static void print_storage_class(unsigned storage_class)
1105 switch((storage_class_tag_t) storage_class) {
1106 case STORAGE_CLASS_ENUM_ENTRY:
1107 case STORAGE_CLASS_NONE:
1109 case STORAGE_CLASS_TYPEDEF: fputs("typedef ", out); break;
1110 case STORAGE_CLASS_EXTERN: fputs("extern ", out); break;
1111 case STORAGE_CLASS_STATIC: fputs("static ", out); break;
1112 case STORAGE_CLASS_AUTO: fputs("auto ", out); break;
1113 case STORAGE_CLASS_REGISTER: fputs("register ", out); break;
1114 case STORAGE_CLASS_THREAD: fputs("__thread", out); break;
1115 case STORAGE_CLASS_THREAD_EXTERN: fputs("extern __thread", out); break;
1116 case STORAGE_CLASS_THREAD_STATIC: fputs("static __thread", out); break;
1121 * Print an initializer.
1123 * @param initializer the initializer
1125 void print_initializer(const initializer_t *initializer)
1127 if(initializer->kind == INITIALIZER_VALUE) {
1128 const initializer_value_t *value = &initializer->value;
1129 print_expression(value->value);
1133 assert(initializer->kind == INITIALIZER_LIST);
1135 const initializer_list_t *list = &initializer->list;
1137 for(size_t i = 0 ; i < list->len; ++i) {
1141 print_initializer(list->initializers[i]);
1147 * Print a declaration in the NORMAL namespace.
1149 * @param declaration the declaration
1151 static void print_normal_declaration(const declaration_t *declaration)
1153 print_storage_class(declaration->storage_class);
1154 if(declaration->is_inline) {
1155 if (declaration->modifiers & DM_FORCEINLINE)
1156 fputs("__forceinline ", out);
1158 fputs("inline ", out);
1160 print_type_ext(declaration->type, declaration->symbol,
1161 &declaration->scope);
1163 if(declaration->type->kind == TYPE_FUNCTION) {
1164 if(declaration->init.statement != NULL) {
1166 print_statement(declaration->init.statement);
1169 } else if(declaration->init.initializer != NULL) {
1171 print_initializer(declaration->init.initializer);
1177 * Prints an expression.
1179 * @param expression the expression
1181 void print_expression(const expression_t *expression) {
1182 print_expression_prec(expression, PREC_BOTTOM);
1186 * Print a declaration.
1188 * @param declaration the declaration
1190 void print_declaration(const declaration_t *declaration)
1192 if(declaration->namespc != NAMESPACE_NORMAL &&
1193 declaration->symbol == NULL)
1196 switch(declaration->namespc) {
1197 case NAMESPACE_NORMAL:
1198 print_normal_declaration(declaration);
1200 case NAMESPACE_STRUCT:
1201 fputs("struct ", out);
1202 fputs(declaration->symbol->string, out);
1204 print_compound_definition(declaration);
1207 case NAMESPACE_UNION:
1208 fputs("union ", out);
1209 fputs(declaration->symbol->string, out);
1211 print_compound_definition(declaration);
1214 case NAMESPACE_ENUM:
1215 fputs("enum ", out);
1216 fputs(declaration->symbol->string, out);
1218 print_enum_definition(declaration);
1225 * Print the AST of a translation unit.
1227 * @param unit the translation unit
1229 void print_ast(const translation_unit_t *unit)
1233 declaration_t *declaration = unit->scope.declarations;
1234 for( ; declaration != NULL; declaration = declaration->next) {
1235 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY)
1237 if(declaration->namespc != NAMESPACE_NORMAL &&
1238 declaration->symbol == NULL)
1242 print_declaration(declaration);
1248 * Returns true if a given expression is a compile time
1251 * @param expression the expression to check
1253 bool is_constant_expression(const expression_t *expression)
1255 switch(expression->kind) {
1258 case EXPR_CHAR_CONST:
1259 case EXPR_STRING_LITERAL:
1260 case EXPR_WIDE_STRING_LITERAL:
1262 case EXPR_CLASSIFY_TYPE:
1264 case EXPR_PRETTY_FUNCTION:
1267 case EXPR_BUILTIN_CONSTANT_P:
1270 case EXPR_BUILTIN_SYMBOL:
1271 case EXPR_BUILTIN_PREFETCH:
1276 case EXPR_STATEMENT:
1277 case EXPR_UNARY_POSTFIX_INCREMENT:
1278 case EXPR_UNARY_POSTFIX_DECREMENT:
1279 case EXPR_UNARY_PREFIX_INCREMENT:
1280 case EXPR_UNARY_PREFIX_DECREMENT:
1281 case EXPR_UNARY_BITFIELD_EXTRACT:
1282 case EXPR_UNARY_ASSUME: /* has VOID type */
1283 case EXPR_BINARY_ASSIGN:
1284 case EXPR_BINARY_MUL_ASSIGN:
1285 case EXPR_BINARY_DIV_ASSIGN:
1286 case EXPR_BINARY_MOD_ASSIGN:
1287 case EXPR_BINARY_ADD_ASSIGN:
1288 case EXPR_BINARY_SUB_ASSIGN:
1289 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1290 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1291 case EXPR_BINARY_BITWISE_AND_ASSIGN:
1292 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
1293 case EXPR_BINARY_BITWISE_OR_ASSIGN:
1294 case EXPR_BINARY_COMMA:
1297 case EXPR_UNARY_NEGATE:
1298 case EXPR_UNARY_PLUS:
1299 case EXPR_UNARY_BITWISE_NEGATE:
1300 case EXPR_UNARY_NOT:
1301 case EXPR_UNARY_DEREFERENCE:
1302 case EXPR_UNARY_TAKE_ADDRESS:
1303 case EXPR_UNARY_CAST:
1304 case EXPR_UNARY_CAST_IMPLICIT:
1305 return is_constant_expression(expression->unary.value);
1307 case EXPR_BINARY_ADD:
1308 case EXPR_BINARY_SUB:
1309 case EXPR_BINARY_MUL:
1310 case EXPR_BINARY_DIV:
1311 case EXPR_BINARY_MOD:
1312 case EXPR_BINARY_EQUAL:
1313 case EXPR_BINARY_NOTEQUAL:
1314 case EXPR_BINARY_LESS:
1315 case EXPR_BINARY_LESSEQUAL:
1316 case EXPR_BINARY_GREATER:
1317 case EXPR_BINARY_GREATEREQUAL:
1318 case EXPR_BINARY_BITWISE_AND:
1319 case EXPR_BINARY_BITWISE_OR:
1320 case EXPR_BINARY_BITWISE_XOR:
1321 case EXPR_BINARY_LOGICAL_AND:
1322 case EXPR_BINARY_LOGICAL_OR:
1323 case EXPR_BINARY_SHIFTLEFT:
1324 case EXPR_BINARY_SHIFTRIGHT:
1325 case EXPR_BINARY_BUILTIN_EXPECT:
1326 case EXPR_BINARY_ISGREATER:
1327 case EXPR_BINARY_ISGREATEREQUAL:
1328 case EXPR_BINARY_ISLESS:
1329 case EXPR_BINARY_ISLESSEQUAL:
1330 case EXPR_BINARY_ISLESSGREATER:
1331 case EXPR_BINARY_ISUNORDERED:
1332 return is_constant_expression(expression->binary.left)
1333 && is_constant_expression(expression->binary.right);
1335 case EXPR_CONDITIONAL:
1336 /* TODO: not correct, we only have to test expressions which are
1337 * evaluated, which means either the true or false part might be not
1339 return is_constant_expression(expression->conditional.condition)
1340 && is_constant_expression(expression->conditional.true_expression)
1341 && is_constant_expression(expression->conditional.false_expression);
1343 case EXPR_ARRAY_ACCESS:
1344 return is_constant_expression(expression->array_access.array_ref)
1345 && is_constant_expression(expression->array_access.index);
1347 case EXPR_REFERENCE: {
1348 declaration_t *declaration = expression->reference.declaration;
1349 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY)
1359 panic("invalid expression found (is constant expression)");
1363 * Initialize the AST construction.
1367 obstack_init(&ast_obstack);
1375 obstack_free(&ast_obstack, NULL);
1379 * Set the output stream for the AST printer.
1381 * @param stream the output stream
1383 void ast_set_output(FILE *stream)
1386 type_set_output(stream);
1390 * Allocate an AST object of the given size.
1392 * @param size the size of the object to allocate
1394 * @return A new allocated object in the AST memeory space.
1396 void *(allocate_ast)(size_t size)
1398 return _allocate_ast(size);