2 * This file is part of cparser.
3 * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
26 #include "lang_features.h"
33 #include "adt/error.h"
35 struct obstack ast_obstack;
40 /** If set, implicit casts are printed. */
41 bool print_implicit_casts = false;
43 /** If set parenthesis are printed to indicate operator precedence. */
44 bool print_parenthesis = false;
46 static void print_statement(const statement_t *statement);
47 static void print_expression_prec(const expression_t *expression, unsigned prec);
49 void change_indent(int delta)
55 void print_indent(void)
57 for(int i = 0; i < indent; ++i)
63 PREC_COMMA = 2, /* , left to right */
64 PREC_ASSIGN = 4, /* = += -= *= /= %= <<= >>= &= ^= |= right to left */
65 PREC_COND = 6, /* ?: right to left */
66 PREC_LOG_OR = 8, /* || left to right */
67 PREC_LOG_AND = 10, /* && left to right */
68 PREC_BIT_OR = 12, /* | left to right */
69 PREC_BIT_XOR = 14, /* ^ left to right */
70 PREC_BIT_AND = 16, /* & left to right */
71 PREC_EQ = 18, /* == != left to right */
72 PREC_CMP = 20, /* < <= > >= left to right */
73 PREC_SHF = 22, /* << >> left to right */
74 PREC_PLUS = 24, /* + - left to right */
75 PREC_MUL = 26, /* * / % left to right */
76 PREC_UNARY = 28, /* ! ~ ++ -- + - (type) * & sizeof right to left */
77 PREC_ACCESS = 30, /* () [] -> . left to right */
78 PREC_PRIM = 32, /* primary */
83 * Returns 1 if a given precedence level has right-to-left
84 * associativity, else -1.
86 * @param precedence the operator precedence
88 static int right_to_left(unsigned precedence) {
89 return (precedence == PREC_ASSIGN || precedence == PREC_COND ||
90 precedence == PREC_UNARY) ? 1 : -1;
94 * Return the precedence of an expression given by its kind.
96 * @param kind the expression kind
98 static unsigned get_expression_precedence(expression_kind_t kind)
100 static const unsigned prec[] = {
101 [EXPR_UNKNOWN] = PREC_PRIM,
102 [EXPR_INVALID] = PREC_PRIM,
103 [EXPR_REFERENCE] = PREC_PRIM,
104 [EXPR_CHARACTER_CONSTANT] = PREC_PRIM,
105 [EXPR_WIDE_CHARACTER_CONSTANT] = PREC_PRIM,
106 [EXPR_CONST] = PREC_PRIM,
107 [EXPR_STRING_LITERAL] = PREC_PRIM,
108 [EXPR_WIDE_STRING_LITERAL] = PREC_PRIM,
109 [EXPR_COMPOUND_LITERAL] = PREC_UNARY,
110 [EXPR_CALL] = PREC_PRIM,
111 [EXPR_CONDITIONAL] = PREC_COND,
112 [EXPR_SELECT] = PREC_ACCESS,
113 [EXPR_ARRAY_ACCESS] = PREC_ACCESS,
114 [EXPR_SIZEOF] = PREC_UNARY,
115 [EXPR_CLASSIFY_TYPE] = PREC_UNARY,
116 [EXPR_ALIGNOF] = PREC_UNARY,
118 [EXPR_FUNCTION] = PREC_PRIM,
119 [EXPR_PRETTY_FUNCTION] = PREC_PRIM,
120 [EXPR_BUILTIN_SYMBOL] = PREC_PRIM,
121 [EXPR_BUILTIN_CONSTANT_P] = PREC_PRIM,
122 [EXPR_BUILTIN_PREFETCH] = PREC_PRIM,
123 [EXPR_OFFSETOF] = PREC_PRIM,
124 [EXPR_VA_START] = PREC_PRIM,
125 [EXPR_VA_ARG] = PREC_PRIM,
126 [EXPR_STATEMENT] = PREC_ACCESS,
128 [EXPR_UNARY_NEGATE] = PREC_UNARY,
129 [EXPR_UNARY_PLUS] = PREC_UNARY,
130 [EXPR_UNARY_BITWISE_NEGATE] = PREC_UNARY,
131 [EXPR_UNARY_NOT] = PREC_UNARY,
132 [EXPR_UNARY_DEREFERENCE] = PREC_UNARY,
133 [EXPR_UNARY_TAKE_ADDRESS] = PREC_UNARY,
134 [EXPR_UNARY_POSTFIX_INCREMENT] = PREC_UNARY,
135 [EXPR_UNARY_POSTFIX_DECREMENT] = PREC_UNARY,
136 [EXPR_UNARY_PREFIX_INCREMENT] = PREC_UNARY,
137 [EXPR_UNARY_PREFIX_DECREMENT] = PREC_UNARY,
138 [EXPR_UNARY_CAST] = PREC_UNARY,
139 [EXPR_UNARY_CAST_IMPLICIT] = PREC_UNARY,
140 [EXPR_UNARY_ASSUME] = PREC_PRIM,
141 [EXPR_UNARY_BITFIELD_EXTRACT] = PREC_ACCESS,
143 [EXPR_BINARY_ADD] = PREC_PLUS,
144 [EXPR_BINARY_SUB] = PREC_PLUS,
145 [EXPR_BINARY_MUL] = PREC_MUL,
146 [EXPR_BINARY_DIV] = PREC_MUL,
147 [EXPR_BINARY_MOD] = PREC_MUL,
148 [EXPR_BINARY_EQUAL] = PREC_EQ,
149 [EXPR_BINARY_NOTEQUAL] = PREC_EQ,
150 [EXPR_BINARY_LESS] = PREC_CMP,
151 [EXPR_BINARY_LESSEQUAL] = PREC_CMP,
152 [EXPR_BINARY_GREATER] = PREC_CMP,
153 [EXPR_BINARY_GREATEREQUAL] = PREC_CMP,
154 [EXPR_BINARY_BITWISE_AND] = PREC_BIT_AND,
155 [EXPR_BINARY_BITWISE_OR] = PREC_BIT_OR,
156 [EXPR_BINARY_BITWISE_XOR] = PREC_BIT_XOR,
157 [EXPR_BINARY_LOGICAL_AND] = PREC_LOG_AND,
158 [EXPR_BINARY_LOGICAL_OR] = PREC_LOG_OR,
159 [EXPR_BINARY_SHIFTLEFT] = PREC_SHF,
160 [EXPR_BINARY_SHIFTRIGHT] = PREC_SHF,
161 [EXPR_BINARY_ASSIGN] = PREC_ASSIGN,
162 [EXPR_BINARY_MUL_ASSIGN] = PREC_ASSIGN,
163 [EXPR_BINARY_DIV_ASSIGN] = PREC_ASSIGN,
164 [EXPR_BINARY_MOD_ASSIGN] = PREC_ASSIGN,
165 [EXPR_BINARY_ADD_ASSIGN] = PREC_ASSIGN,
166 [EXPR_BINARY_SUB_ASSIGN] = PREC_ASSIGN,
167 [EXPR_BINARY_SHIFTLEFT_ASSIGN] = PREC_ASSIGN,
168 [EXPR_BINARY_SHIFTRIGHT_ASSIGN] = PREC_ASSIGN,
169 [EXPR_BINARY_BITWISE_AND_ASSIGN] = PREC_ASSIGN,
170 [EXPR_BINARY_BITWISE_XOR_ASSIGN] = PREC_ASSIGN,
171 [EXPR_BINARY_BITWISE_OR_ASSIGN] = PREC_ASSIGN,
172 [EXPR_BINARY_COMMA] = PREC_COMMA,
174 [EXPR_BINARY_BUILTIN_EXPECT] = PREC_PRIM,
175 [EXPR_BINARY_ISGREATER] = PREC_PRIM,
176 [EXPR_BINARY_ISGREATEREQUAL] = PREC_PRIM,
177 [EXPR_BINARY_ISLESS] = PREC_PRIM,
178 [EXPR_BINARY_ISLESSEQUAL] = PREC_PRIM,
179 [EXPR_BINARY_ISLESSGREATER] = PREC_PRIM,
180 [EXPR_BINARY_ISUNORDERED] = PREC_PRIM
182 assert((unsigned)kind < (sizeof(prec)/sizeof(prec[0])));
183 unsigned res = prec[kind];
185 assert(res != PREC_BOTTOM);
190 * Print a constant expression.
192 * @param cnst the constant expression
194 static void print_const(const const_expression_t *cnst)
196 if(cnst->base.type == NULL)
199 const type_t *const type = skip_typeref(cnst->base.type);
201 if (is_type_integer(type)) {
202 fprintf(out, "%lld", cnst->v.int_value);
203 } else if (is_type_float(type)) {
204 fprintf(out, "%Lf", cnst->v.float_value);
206 panic("unknown constant");
211 * Print a quoted string constant.
213 * @param string the string constant
214 * @param border the border char
216 static void print_quoted_string(const string_t *const string, char border)
219 const char *end = string->begin + string->size - 1;
220 for (const char *c = string->begin; c != end; ++c) {
225 case '\\': fputs("\\\\", out); break;
226 case '\a': fputs("\\a", out); break;
227 case '\b': fputs("\\b", out); break;
228 case '\f': fputs("\\f", out); break;
229 case '\n': fputs("\\n", out); break;
230 case '\r': fputs("\\r", out); break;
231 case '\t': fputs("\\t", out); break;
232 case '\v': fputs("\\v", out); break;
233 case '\?': fputs("\\?", out); break;
236 fprintf(out, "\\%03o", *c);
247 * Prints a wide string literal expression.
249 * @param wstr the wide string literal expression
251 static void print_quoted_wide_string(const wide_string_t *const wstr,
256 for (const wchar_rep_t *c = wstr->begin, *end = wstr->begin + wstr->size-1;
259 case L'\"': fputs("\\\"", out); break;
260 case L'\\': fputs("\\\\", out); break;
261 case L'\a': fputs("\\a", out); break;
262 case L'\b': fputs("\\b", out); break;
263 case L'\f': fputs("\\f", out); break;
264 case L'\n': fputs("\\n", out); break;
265 case L'\r': fputs("\\r", out); break;
266 case L'\t': fputs("\\t", out); break;
267 case L'\v': fputs("\\v", out); break;
268 case L'\?': fputs("\\?", out); break;
270 const unsigned tc = *c;
273 fprintf(out, "\\%03o", (char)*c);
277 } else if (tc < 0x800) {
278 fputc(0xC0 | (tc >> 6), out);
279 fputc(0x80 | (tc & 0x3F), out);
280 } else if (tc < 0x10000) {
281 fputc(0xE0 | ( tc >> 12), out);
282 fputc(0x80 | ((tc >> 6) & 0x3F), out);
283 fputc(0x80 | ( tc & 0x3F), out);
285 fputc(0xF0 | ( tc >> 18), out);
286 fputc(0x80 | ((tc >> 12) & 0x3F), out);
287 fputc(0x80 | ((tc >> 6) & 0x3F), out);
288 fputc(0x80 | ( tc & 0x3F), out);
297 * Print a constant character expression.
299 * @param cnst the constant character expression
301 static void print_character_constant(const const_expression_t *cnst)
303 print_quoted_string(&cnst->v.character, '\'');
306 static void print_wide_character_constant(const const_expression_t *cnst)
308 print_quoted_wide_string(&cnst->v.wide_character, '\'');
312 * Prints a string literal expression.
314 * @param string_literal the string literal expression
316 static void print_string_literal(
317 const string_literal_expression_t *string_literal)
319 print_quoted_string(&string_literal->value, '"');
322 static void print_wide_string_literal(
323 const wide_string_literal_expression_t *const wstr)
325 print_quoted_wide_string(&wstr->value, '"');
328 static void print_compound_literal(
329 const compound_literal_expression_t *expression)
332 print_type(expression->type);
334 print_initializer(expression->initializer);
338 * Prints a call expression.
340 * @param call the call expression
342 static void print_call_expression(const call_expression_t *call)
344 unsigned prec = get_expression_precedence(call->base.kind);
345 print_expression_prec(call->function, prec);
347 call_argument_t *argument = call->arguments;
349 while(argument != NULL) {
355 print_expression_prec(argument->expression, PREC_COMMA + 1);
357 argument = argument->next;
363 * Prints a binary expression.
365 * @param binexpr the binary expression
367 static void print_binary_expression(const binary_expression_t *binexpr)
369 unsigned prec = get_expression_precedence(binexpr->base.kind);
370 int r2l = right_to_left(prec);
372 if(binexpr->base.kind == EXPR_BINARY_BUILTIN_EXPECT) {
373 fputs("__builtin_expect(", out);
374 print_expression_prec(binexpr->left, prec);
376 print_expression_prec(binexpr->right, prec);
381 print_expression_prec(binexpr->left, prec + r2l);
382 if (binexpr->base.kind != EXPR_BINARY_COMMA) {
385 switch (binexpr->base.kind) {
386 case EXPR_BINARY_COMMA: fputs(",", out); break;
387 case EXPR_BINARY_ASSIGN: fputs("=", out); break;
388 case EXPR_BINARY_ADD: fputs("+", out); break;
389 case EXPR_BINARY_SUB: fputs("-", out); break;
390 case EXPR_BINARY_MUL: fputs("*", out); break;
391 case EXPR_BINARY_MOD: fputs("%", out); break;
392 case EXPR_BINARY_DIV: fputs("/", out); break;
393 case EXPR_BINARY_BITWISE_OR: fputs("|", out); break;
394 case EXPR_BINARY_BITWISE_AND: fputs("&", out); break;
395 case EXPR_BINARY_BITWISE_XOR: fputs("^", out); break;
396 case EXPR_BINARY_LOGICAL_OR: fputs("||", out); break;
397 case EXPR_BINARY_LOGICAL_AND: fputs("&&", out); break;
398 case EXPR_BINARY_NOTEQUAL: fputs("!=", out); break;
399 case EXPR_BINARY_EQUAL: fputs("==", out); break;
400 case EXPR_BINARY_LESS: fputs("<", out); break;
401 case EXPR_BINARY_LESSEQUAL: fputs("<=", out); break;
402 case EXPR_BINARY_GREATER: fputs(">", out); break;
403 case EXPR_BINARY_GREATEREQUAL: fputs(">=", out); break;
404 case EXPR_BINARY_SHIFTLEFT: fputs("<<", out); break;
405 case EXPR_BINARY_SHIFTRIGHT: fputs(">>", out); break;
407 case EXPR_BINARY_ADD_ASSIGN: fputs("+=", out); break;
408 case EXPR_BINARY_SUB_ASSIGN: fputs("-=", out); break;
409 case EXPR_BINARY_MUL_ASSIGN: fputs("*=", out); break;
410 case EXPR_BINARY_MOD_ASSIGN: fputs("%=", out); break;
411 case EXPR_BINARY_DIV_ASSIGN: fputs("/=", out); break;
412 case EXPR_BINARY_BITWISE_OR_ASSIGN: fputs("|=", out); break;
413 case EXPR_BINARY_BITWISE_AND_ASSIGN: fputs("&=", out); break;
414 case EXPR_BINARY_BITWISE_XOR_ASSIGN: fputs("^=", out); break;
415 case EXPR_BINARY_SHIFTLEFT_ASSIGN: fputs("<<=", out); break;
416 case EXPR_BINARY_SHIFTRIGHT_ASSIGN: fputs(">>=", out); break;
417 default: panic("invalid binexpression found");
420 print_expression_prec(binexpr->right, prec - r2l);
424 * Prints an unary expression.
426 * @param unexpr the unary expression
428 static void print_unary_expression(const unary_expression_t *unexpr)
430 unsigned prec = get_expression_precedence(unexpr->base.kind);
431 switch(unexpr->base.kind) {
432 case EXPR_UNARY_NEGATE: fputs("-", out); break;
433 case EXPR_UNARY_PLUS: fputs("+", out); break;
434 case EXPR_UNARY_NOT: fputs("!", out); break;
435 case EXPR_UNARY_BITWISE_NEGATE: fputs("~", out); break;
436 case EXPR_UNARY_PREFIX_INCREMENT: fputs("++", out); break;
437 case EXPR_UNARY_PREFIX_DECREMENT: fputs("--", out); break;
438 case EXPR_UNARY_DEREFERENCE: fputs("*", out); break;
439 case EXPR_UNARY_TAKE_ADDRESS: fputs("&", out); break;
441 case EXPR_UNARY_BITFIELD_EXTRACT:
442 print_expression_prec(unexpr->value, prec);
445 case EXPR_UNARY_POSTFIX_INCREMENT:
446 print_expression_prec(unexpr->value, prec);
449 case EXPR_UNARY_POSTFIX_DECREMENT:
450 print_expression_prec(unexpr->value, prec);
453 case EXPR_UNARY_CAST_IMPLICIT:
454 if(!print_implicit_casts) {
455 print_expression_prec(unexpr->value, prec);
459 case EXPR_UNARY_CAST:
461 print_type(unexpr->base.type);
464 case EXPR_UNARY_ASSUME:
465 fputs("__assume(", out);
466 print_expression_prec(unexpr->value, PREC_COMMA + 1);
470 panic("invalid unary expression found");
472 print_expression_prec(unexpr->value, prec);
476 * Prints a reference expression.
478 * @param ref the reference expression
480 static void print_reference_expression(const reference_expression_t *ref)
482 fprintf(out, "%s", ref->declaration->symbol->string);
486 * Prints an array expression.
488 * @param expression the array expression
490 static void print_array_expression(const array_access_expression_t *expression)
492 unsigned prec = get_expression_precedence(expression->base.kind);
493 if(!expression->flipped) {
494 print_expression_prec(expression->array_ref, prec);
496 print_expression_prec(expression->index, prec);
499 print_expression_prec(expression->index, prec);
501 print_expression_prec(expression->array_ref, prec);
507 * Prints a typeproperty expression (sizeof or __alignof__).
509 * @param expression the type property expression
511 static void print_typeprop_expression(const typeprop_expression_t *expression)
513 if (expression->base.kind == EXPR_SIZEOF) {
514 fputs("sizeof", out);
516 assert(expression->base.kind == EXPR_ALIGNOF);
517 fputs("__alignof__", out);
519 if(expression->tp_expression != NULL) {
520 /* always print the '()' here, sizeof x is right but unusual */
522 print_expression_prec(expression->tp_expression, PREC_ACCESS);
526 print_type(expression->type);
532 * Prints an builtin symbol.
534 * @param expression the builtin symbol expression
536 static void print_builtin_symbol(const builtin_symbol_expression_t *expression)
538 fputs(expression->symbol->string, out);
542 * Prints a builtin constant expression.
544 * @param expression the builtin constant expression
546 static void print_builtin_constant(const builtin_constant_expression_t *expression)
548 fputs("__builtin_constant_p(", out);
549 print_expression_prec(expression->value, PREC_COMMA + 1);
554 * Prints a builtin prefetch expression.
556 * @param expression the builtin prefetch expression
558 static void print_builtin_prefetch(const builtin_prefetch_expression_t *expression)
560 fputs("__builtin_prefetch(", out);
561 print_expression_prec(expression->adr, PREC_COMMA + 1);
562 if (expression->rw) {
564 print_expression_prec(expression->rw, PREC_COMMA + 1);
566 if (expression->locality) {
568 print_expression_prec(expression->locality, PREC_COMMA + 1);
574 * Prints a conditional expression.
576 * @param expression the conditional expression
578 static void print_conditional(const conditional_expression_t *expression)
580 unsigned prec = get_expression_precedence(expression->base.kind);
582 print_expression_prec(expression->condition, prec);
584 print_expression_prec(expression->true_expression, prec);
586 print_expression_prec(expression->false_expression, prec);
591 * Prints a va_start expression.
593 * @param expression the va_start expression
595 static void print_va_start(const va_start_expression_t *const expression)
597 fputs("__builtin_va_start(", out);
598 print_expression_prec(expression->ap, PREC_COMMA + 1);
600 fputs(expression->parameter->symbol->string, out);
605 * Prints a va_arg expression.
607 * @param expression the va_arg expression
609 static void print_va_arg(const va_arg_expression_t *expression)
611 fputs("__builtin_va_arg(", out);
612 print_expression_prec(expression->ap, PREC_COMMA + 1);
614 print_type(expression->base.type);
619 * Prints a select expression (. or ->).
621 * @param expression the select expression
623 static void print_select(const select_expression_t *expression)
625 unsigned prec = get_expression_precedence(expression->base.kind);
626 print_expression_prec(expression->compound, prec);
627 if(is_type_pointer(expression->compound->base.type)) {
632 fputs(expression->symbol->string, out);
636 * Prints a type classify expression.
638 * @param expr the type classify expression
640 static void print_classify_type_expression(
641 const classify_type_expression_t *const expr)
643 fputs("__builtin_classify_type(", out);
644 print_expression_prec(expr->type_expression, PREC_COMMA + 1);
649 * Prints a designator.
651 * @param designator the designator
653 static void print_designator(const designator_t *designator)
655 for ( ; designator != NULL; designator = designator->next) {
656 if (designator->symbol == NULL) {
658 print_expression_prec(designator->array_index, PREC_ACCESS);
662 fputs(designator->symbol->string, out);
668 * Prints an offsetof expression.
670 * @param expression the offset expression
672 static void print_offsetof_expression(const offsetof_expression_t *expression)
674 fputs("__builtin_offsetof", out);
676 print_type(expression->type);
678 print_designator(expression->designator);
683 * Prints a statement expression.
685 * @param expression the statement expression
687 static void print_statement_expression(const statement_expression_t *expression)
690 print_statement(expression->statement);
695 * Prints an expression with parenthesis if needed.
697 * @param expression the expression to print
698 * @param top_prec the precedence of the user of this expression.
700 static void print_expression_prec(const expression_t *expression, unsigned top_prec)
702 unsigned prec = get_expression_precedence(expression->base.kind);
703 if (print_parenthesis && top_prec != PREC_BOTTOM)
707 switch(expression->kind) {
710 fprintf(out, "$invalid expression$");
712 case EXPR_CHARACTER_CONSTANT:
713 print_character_constant(&expression->conste);
715 case EXPR_WIDE_CHARACTER_CONSTANT:
716 print_wide_character_constant(&expression->conste);
719 print_const(&expression->conste);
722 case EXPR_PRETTY_FUNCTION:
723 case EXPR_STRING_LITERAL:
724 print_string_literal(&expression->string);
726 case EXPR_WIDE_STRING_LITERAL:
727 print_wide_string_literal(&expression->wide_string);
729 case EXPR_COMPOUND_LITERAL:
730 print_compound_literal(&expression->compound_literal);
733 print_call_expression(&expression->call);
736 print_binary_expression(&expression->binary);
739 print_reference_expression(&expression->reference);
741 case EXPR_ARRAY_ACCESS:
742 print_array_expression(&expression->array_access);
745 print_unary_expression(&expression->unary);
749 print_typeprop_expression(&expression->typeprop);
751 case EXPR_BUILTIN_SYMBOL:
752 print_builtin_symbol(&expression->builtin_symbol);
754 case EXPR_BUILTIN_CONSTANT_P:
755 print_builtin_constant(&expression->builtin_constant);
757 case EXPR_BUILTIN_PREFETCH:
758 print_builtin_prefetch(&expression->builtin_prefetch);
760 case EXPR_CONDITIONAL:
761 print_conditional(&expression->conditional);
764 print_va_start(&expression->va_starte);
767 print_va_arg(&expression->va_arge);
770 print_select(&expression->select);
772 case EXPR_CLASSIFY_TYPE:
773 print_classify_type_expression(&expression->classify_type);
776 print_offsetof_expression(&expression->offsetofe);
779 print_statement_expression(&expression->statement);
784 fprintf(out, "some expression of type %d", (int) expression->kind);
792 * Print an compound statement.
794 * @param block the compound statement
796 static void print_compound_statement(const compound_statement_t *block)
801 statement_t *statement = block->statements;
802 while(statement != NULL) {
803 if (statement->base.kind == STATEMENT_CASE_LABEL)
806 print_statement(statement);
808 statement = statement->base.next;
816 * Print a return statement.
818 * @param statement the return statement
820 static void print_return_statement(const return_statement_t *statement)
822 fprintf(out, "return ");
823 if(statement->value != NULL)
824 print_expression(statement->value);
829 * Print an expression statement.
831 * @param statement the expression statement
833 static void print_expression_statement(const expression_statement_t *statement)
835 print_expression(statement->expression);
840 * Print a goto statement.
842 * @param statement the goto statement
844 static void print_goto_statement(const goto_statement_t *statement)
846 fprintf(out, "goto ");
847 fputs(statement->label->symbol->string, out);
848 fprintf(stderr, "(%p)", (void*) statement->label);
853 * Print a label statement.
855 * @param statement the label statement
857 static void print_label_statement(const label_statement_t *statement)
859 fprintf(stderr, "(%p)", (void*) statement->label);
860 fprintf(out, "%s:\n", statement->label->symbol->string);
861 print_statement(statement->statement);
865 * Print an if statement.
867 * @param statement the if statement
869 static void print_if_statement(const if_statement_t *statement)
872 print_expression(statement->condition);
874 print_statement(statement->true_statement);
876 if(statement->false_statement != NULL) {
879 print_statement(statement->false_statement);
884 * Print a switch statement.
886 * @param statement the switch statement
888 static void print_switch_statement(const switch_statement_t *statement)
890 fputs("switch (", out);
891 print_expression(statement->expression);
893 print_statement(statement->body);
897 * Print a case label (including the default label).
899 * @param statement the case label statement
901 static void print_case_label(const case_label_statement_t *statement)
903 if(statement->expression == NULL) {
904 fputs("default:\n", out);
907 print_expression(statement->expression);
908 if (statement->end_range != NULL) {
910 print_expression(statement->end_range);
915 if(statement->statement != NULL) {
916 if (statement->statement->base.kind == STATEMENT_CASE_LABEL) {
920 print_statement(statement->statement);
925 * Print a declaration statement.
927 * @param statement the statement
929 static void print_declaration_statement(
930 const declaration_statement_t *statement)
933 declaration_t *declaration = statement->declarations_begin;
934 for( ; declaration != statement->declarations_end->next;
935 declaration = declaration->next) {
936 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY)
944 print_declaration(declaration);
950 * Print a while statement.
952 * @param statement the statement
954 static void print_while_statement(const while_statement_t *statement)
956 fputs("while (", out);
957 print_expression(statement->condition);
959 print_statement(statement->body);
963 * Print a do-while statement.
965 * @param statement the statement
967 static void print_do_while_statement(const do_while_statement_t *statement)
970 print_statement(statement->body);
972 fputs("while (", out);
973 print_expression(statement->condition);
978 * Print a for statement.
980 * @param statement the statement
982 static void print_for_statement(const for_statement_t *statement)
985 if(statement->scope.declarations != NULL) {
986 assert(statement->initialisation == NULL);
987 print_declaration(statement->scope.declarations);
988 if(statement->scope.declarations->next != NULL) {
989 panic("multiple declarations in for statement not supported yet");
993 if(statement->initialisation) {
994 print_expression(statement->initialisation);
998 if(statement->condition != NULL) {
999 print_expression(statement->condition);
1002 if(statement->step != NULL) {
1003 print_expression(statement->step);
1006 print_statement(statement->body);
1010 * Print assembler constraints.
1012 * @param constraints the constraints
1014 static void print_asm_constraints(asm_constraint_t *constraints)
1016 asm_constraint_t *constraint = constraints;
1017 for( ; constraint != NULL; constraint = constraint->next) {
1018 if(constraint != constraints)
1021 if(constraint->symbol) {
1022 fprintf(out, "[%s] ", constraint->symbol->string);
1024 print_quoted_string(&constraint->constraints, '"');
1026 print_expression(constraint->expression);
1032 * Print assembler clobbers.
1034 * @param clobbers the clobbers
1036 static void print_asm_clobbers(asm_clobber_t *clobbers)
1038 asm_clobber_t *clobber = clobbers;
1039 for( ; clobber != NULL; clobber = clobber->next) {
1040 if(clobber != clobbers)
1043 print_quoted_string(&clobber->clobber, '"');
1048 * Print an assembler statement.
1050 * @param statement the statement
1052 static void print_asm_statement(const asm_statement_t *statement)
1055 if(statement->is_volatile) {
1056 fputs("volatile ", out);
1059 print_quoted_string(&statement->asm_text, '"');
1060 if(statement->inputs == NULL && statement->outputs == NULL
1061 && statement->clobbers == NULL)
1062 goto end_of_print_asm_statement;
1065 print_asm_constraints(statement->inputs);
1066 if(statement->outputs == NULL && statement->clobbers == NULL)
1067 goto end_of_print_asm_statement;
1070 print_asm_constraints(statement->outputs);
1071 if(statement->clobbers == NULL)
1072 goto end_of_print_asm_statement;
1075 print_asm_clobbers(statement->clobbers);
1077 end_of_print_asm_statement:
1082 * Print a statement.
1084 * @param statement the statement
1086 void print_statement(const statement_t *statement)
1088 switch(statement->kind) {
1089 case STATEMENT_EMPTY:
1092 case STATEMENT_COMPOUND:
1093 print_compound_statement(&statement->compound);
1095 case STATEMENT_RETURN:
1096 print_return_statement(&statement->returns);
1098 case STATEMENT_EXPRESSION:
1099 print_expression_statement(&statement->expression);
1101 case STATEMENT_LABEL:
1102 print_label_statement(&statement->label);
1104 case STATEMENT_GOTO:
1105 print_goto_statement(&statement->gotos);
1107 case STATEMENT_CONTINUE:
1108 fputs("continue;\n", out);
1110 case STATEMENT_BREAK:
1111 fputs("break;\n", out);
1114 print_if_statement(&statement->ifs);
1116 case STATEMENT_SWITCH:
1117 print_switch_statement(&statement->switchs);
1119 case STATEMENT_CASE_LABEL:
1120 print_case_label(&statement->case_label);
1122 case STATEMENT_DECLARATION:
1123 print_declaration_statement(&statement->declaration);
1125 case STATEMENT_WHILE:
1126 print_while_statement(&statement->whiles);
1128 case STATEMENT_DO_WHILE:
1129 print_do_while_statement(&statement->do_while);
1132 print_for_statement(&statement->fors);
1135 print_asm_statement(&statement->asms);
1137 case STATEMENT_INVALID:
1138 fprintf(out, "$invalid statement$");
1144 * Print a storage class.
1146 * @param storage_class the storage class
1148 static void print_storage_class(storage_class_tag_t storage_class)
1150 switch(storage_class) {
1151 case STORAGE_CLASS_ENUM_ENTRY:
1152 case STORAGE_CLASS_NONE:
1154 case STORAGE_CLASS_TYPEDEF: fputs("typedef ", out); break;
1155 case STORAGE_CLASS_EXTERN: fputs("extern ", out); break;
1156 case STORAGE_CLASS_STATIC: fputs("static ", out); break;
1157 case STORAGE_CLASS_AUTO: fputs("auto ", out); break;
1158 case STORAGE_CLASS_REGISTER: fputs("register ", out); break;
1159 case STORAGE_CLASS_THREAD: fputs("__thread", out); break;
1160 case STORAGE_CLASS_THREAD_EXTERN: fputs("extern __thread", out); break;
1161 case STORAGE_CLASS_THREAD_STATIC: fputs("static __thread", out); break;
1166 * Print an initializer.
1168 * @param initializer the initializer
1170 void print_initializer(const initializer_t *initializer)
1172 if(initializer == NULL) {
1177 switch(initializer->kind) {
1178 case INITIALIZER_VALUE: {
1179 const initializer_value_t *value = &initializer->value;
1180 print_expression(value->value);
1183 case INITIALIZER_LIST: {
1184 assert(initializer->kind == INITIALIZER_LIST);
1186 const initializer_list_t *list = &initializer->list;
1188 for(size_t i = 0 ; i < list->len; ++i) {
1189 const initializer_t *sub_init = list->initializers[i];
1190 print_initializer(list->initializers[i]);
1191 if(i < list->len-1) {
1192 if(sub_init == NULL || sub_init->kind != INITIALIZER_DESIGNATOR)
1199 case INITIALIZER_STRING:
1200 print_quoted_string(&initializer->string.string, '"');
1202 case INITIALIZER_WIDE_STRING:
1203 print_quoted_wide_string(&initializer->wide_string.string, '"');
1205 case INITIALIZER_DESIGNATOR:
1206 print_designator(initializer->designator.designator);
1211 panic("invalid initializer kind found");
1215 * Print microsoft extended declaration modifiers.
1217 static void print_ms_modifiers(const declaration_t *declaration) {
1218 if((c_mode & _MS) == 0)
1221 decl_modifiers_t modifiers = declaration->modifiers;
1223 /* DM_FORCEINLINE handled outside. */
1224 if((modifiers & ~DM_FORCEINLINE) != 0 ||
1225 declaration->alignment != 0 || declaration->deprecated != 0 ||
1226 declaration->get_property_sym != NULL || declaration->put_property_sym != NULL) {
1229 fputs("__declspec", out);
1230 if(modifiers & DM_DLLIMPORT) {
1231 fputs(next, out); next = ", "; fputs("dllimport", out);
1233 if(modifiers & DM_DLLEXPORT) {
1234 fputs(next, out); next = ", "; fputs("dllexport", out);
1236 if(modifiers & DM_THREAD) {
1237 fputs(next, out); next = ", "; fputs("thread", out);
1239 if(modifiers & DM_NAKED) {
1240 fputs(next, out); next = ", "; fputs("naked", out);
1242 if(modifiers & DM_THREAD) {
1243 fputs(next, out); next = ", "; fputs("thread", out);
1245 if(modifiers & DM_SELECTANY) {
1246 fputs(next, out); next = ", "; fputs("selectany", out);
1248 if(modifiers & DM_NOTHROW) {
1249 fputs(next, out); next = ", "; fputs("nothrow", out);
1251 if(modifiers & DM_NORETURN) {
1252 fputs(next, out); next = ", "; fputs("noreturn", out);
1254 if(modifiers & DM_NOINLINE) {
1255 fputs(next, out); next = ", "; fputs("noinline", out);
1257 if(declaration->deprecated != 0) {
1258 fputs(next, out); next = ", "; fputs("deprecated", out);
1259 if(declaration->deprecated_string != NULL)
1260 fprintf(out, "(\"%s\")", declaration->deprecated_string);
1262 if(declaration->alignment != 0) {
1263 fputs(next, out); next = ", "; fprintf(out, "align(%u)", declaration->alignment);
1265 if(modifiers & DM_RESTRICT) {
1266 fputs(next, out); next = ", "; fputs("restrict", out);
1268 if(modifiers & DM_NOALIAS) {
1269 fputs(next, out); next = ", "; fputs("noalias", out);
1271 if(declaration->get_property_sym != NULL || declaration->put_property_sym != NULL) {
1273 fputs(next, out); next = ", "; fprintf(out, "property(");
1274 if(declaration->get_property_sym != NULL) {
1275 fprintf(out, "get=%s", declaration->get_property_sym->string);
1278 if(declaration->put_property_sym != NULL)
1279 fprintf(out, "%sput=%s", comma, declaration->put_property_sym->string);
1287 * Print a declaration in the NORMAL namespace.
1289 * @param declaration the declaration
1291 static void print_normal_declaration(const declaration_t *declaration)
1293 print_storage_class((storage_class_tag_t) declaration->declared_storage_class);
1294 if(declaration->is_inline) {
1295 if(declaration->modifiers & DM_FORCEINLINE)
1296 fputs("__forceinline ", out);
1298 if(declaration->modifiers & DM_MICROSOFT_INLINE)
1299 fputs("__inline ", out);
1301 fputs("inline ", out);
1304 print_ms_modifiers(declaration);
1305 print_type_ext(declaration->type, declaration->symbol,
1306 &declaration->scope);
1308 if(declaration->type->kind == TYPE_FUNCTION) {
1309 if(declaration->init.statement != NULL) {
1311 print_statement(declaration->init.statement);
1314 } else if(declaration->init.initializer != NULL) {
1316 print_initializer(declaration->init.initializer);
1322 * Prints an expression.
1324 * @param expression the expression
1326 void print_expression(const expression_t *expression) {
1327 print_expression_prec(expression, PREC_BOTTOM);
1331 * Print a declaration.
1333 * @param declaration the declaration
1335 void print_declaration(const declaration_t *declaration)
1337 if(declaration->namespc != NAMESPACE_NORMAL &&
1338 declaration->symbol == NULL)
1341 switch(declaration->namespc) {
1342 case NAMESPACE_NORMAL:
1343 print_normal_declaration(declaration);
1345 case NAMESPACE_STRUCT:
1346 fputs("struct ", out);
1347 fputs(declaration->symbol->string, out);
1349 print_compound_definition(declaration);
1352 case NAMESPACE_UNION:
1353 fputs("union ", out);
1354 fputs(declaration->symbol->string, out);
1356 print_compound_definition(declaration);
1359 case NAMESPACE_ENUM:
1360 fputs("enum ", out);
1361 fputs(declaration->symbol->string, out);
1363 print_enum_definition(declaration);
1370 * Print the AST of a translation unit.
1372 * @param unit the translation unit
1374 void print_ast(const translation_unit_t *unit)
1378 declaration_t *declaration = unit->scope.declarations;
1379 for( ; declaration != NULL; declaration = declaration->next) {
1380 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY)
1382 if(declaration->namespc != NAMESPACE_NORMAL &&
1383 declaration->symbol == NULL)
1387 print_declaration(declaration);
1392 bool is_constant_initializer(const initializer_t *initializer)
1394 switch(initializer->kind) {
1395 case INITIALIZER_STRING:
1396 case INITIALIZER_WIDE_STRING:
1397 case INITIALIZER_DESIGNATOR:
1400 case INITIALIZER_VALUE:
1401 return is_constant_expression(initializer->value.value);
1403 case INITIALIZER_LIST:
1404 for(size_t i = 0; i < initializer->list.len; ++i) {
1405 initializer_t *sub_initializer = initializer->list.initializers[i];
1406 if(!is_constant_initializer(sub_initializer))
1411 panic("invalid initializer kind found");
1414 static bool is_object_with_constant_address(const expression_t *expression)
1416 switch(expression->kind) {
1417 case EXPR_UNARY_DEREFERENCE:
1418 return is_address_constant(expression->unary.value);
1421 if(is_type_pointer(expression->select.compound->base.type)) {
1423 return is_address_constant(expression->select.compound);
1425 return is_object_with_constant_address(expression->select.compound);
1429 case EXPR_ARRAY_ACCESS:
1430 return is_constant_expression(expression->array_access.index)
1431 && is_address_constant(expression->array_access.array_ref);
1433 case EXPR_REFERENCE: {
1434 declaration_t *declaration = expression->reference.declaration;
1435 switch((storage_class_tag_t) declaration->storage_class) {
1436 case STORAGE_CLASS_NONE:
1437 case STORAGE_CLASS_EXTERN:
1438 case STORAGE_CLASS_STATIC:
1450 bool is_address_constant(const expression_t *expression)
1452 switch(expression->kind) {
1453 case EXPR_UNARY_TAKE_ADDRESS:
1454 return is_object_with_constant_address(expression->unary.value);
1456 case EXPR_UNARY_DEREFERENCE: {
1457 type_t *real_type = revert_automatic_type_conversion(expression->unary.value);
1458 /* dereferencing a function is a NOP */
1459 if(is_type_function(real_type)) {
1460 return is_address_constant(expression->unary.value);
1464 case EXPR_UNARY_CAST:
1465 return is_type_pointer(skip_typeref(expression->base.type))
1466 && (is_constant_expression(expression->unary.value)
1467 || is_address_constant(expression->unary.value));
1469 case EXPR_BINARY_ADD:
1470 case EXPR_BINARY_SUB: {
1471 expression_t *left = expression->binary.left;
1472 expression_t *right = expression->binary.right;
1474 if(is_type_pointer(skip_typeref(left->base.type))) {
1475 return is_address_constant(left) && is_constant_expression(right);
1476 } else if(is_type_pointer(skip_typeref(right->base.type))) {
1477 return is_constant_expression(left) && is_address_constant(right);
1483 case EXPR_REFERENCE: {
1484 declaration_t *declaration = expression->reference.declaration;
1485 type_t *type = skip_typeref(declaration->type);
1486 if(is_type_function(type))
1488 if(is_type_array(type)) {
1489 return is_object_with_constant_address(expression);
1499 bool is_constant_expression(const expression_t *expression)
1501 switch(expression->kind) {
1504 case EXPR_CHARACTER_CONSTANT:
1505 case EXPR_WIDE_CHARACTER_CONSTANT:
1506 case EXPR_STRING_LITERAL:
1507 case EXPR_WIDE_STRING_LITERAL:
1509 case EXPR_CLASSIFY_TYPE:
1512 case EXPR_FUNCDNAME:
1513 case EXPR_PRETTY_FUNCTION:
1516 case EXPR_BUILTIN_CONSTANT_P:
1519 case EXPR_BUILTIN_SYMBOL:
1520 case EXPR_BUILTIN_PREFETCH:
1525 case EXPR_STATEMENT:
1526 case EXPR_UNARY_POSTFIX_INCREMENT:
1527 case EXPR_UNARY_POSTFIX_DECREMENT:
1528 case EXPR_UNARY_PREFIX_INCREMENT:
1529 case EXPR_UNARY_PREFIX_DECREMENT:
1530 case EXPR_UNARY_BITFIELD_EXTRACT:
1531 case EXPR_UNARY_ASSUME: /* has VOID type */
1532 case EXPR_UNARY_TAKE_ADDRESS:
1533 case EXPR_UNARY_DEREFERENCE:
1534 case EXPR_BINARY_ASSIGN:
1535 case EXPR_BINARY_MUL_ASSIGN:
1536 case EXPR_BINARY_DIV_ASSIGN:
1537 case EXPR_BINARY_MOD_ASSIGN:
1538 case EXPR_BINARY_ADD_ASSIGN:
1539 case EXPR_BINARY_SUB_ASSIGN:
1540 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1541 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1542 case EXPR_BINARY_BITWISE_AND_ASSIGN:
1543 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
1544 case EXPR_BINARY_BITWISE_OR_ASSIGN:
1545 case EXPR_BINARY_COMMA:
1548 case EXPR_UNARY_NEGATE:
1549 case EXPR_UNARY_PLUS:
1550 case EXPR_UNARY_BITWISE_NEGATE:
1551 case EXPR_UNARY_NOT:
1552 return is_constant_expression(expression->unary.value);
1554 case EXPR_UNARY_CAST:
1555 case EXPR_UNARY_CAST_IMPLICIT:
1556 return is_type_arithmetic(skip_typeref(expression->base.type))
1557 && is_constant_expression(expression->unary.value);
1559 case EXPR_BINARY_ADD:
1560 case EXPR_BINARY_SUB:
1561 case EXPR_BINARY_MUL:
1562 case EXPR_BINARY_DIV:
1563 case EXPR_BINARY_MOD:
1564 case EXPR_BINARY_EQUAL:
1565 case EXPR_BINARY_NOTEQUAL:
1566 case EXPR_BINARY_LESS:
1567 case EXPR_BINARY_LESSEQUAL:
1568 case EXPR_BINARY_GREATER:
1569 case EXPR_BINARY_GREATEREQUAL:
1570 case EXPR_BINARY_BITWISE_AND:
1571 case EXPR_BINARY_BITWISE_OR:
1572 case EXPR_BINARY_BITWISE_XOR:
1573 case EXPR_BINARY_LOGICAL_AND:
1574 case EXPR_BINARY_LOGICAL_OR:
1575 case EXPR_BINARY_SHIFTLEFT:
1576 case EXPR_BINARY_SHIFTRIGHT:
1577 case EXPR_BINARY_BUILTIN_EXPECT:
1578 case EXPR_BINARY_ISGREATER:
1579 case EXPR_BINARY_ISGREATEREQUAL:
1580 case EXPR_BINARY_ISLESS:
1581 case EXPR_BINARY_ISLESSEQUAL:
1582 case EXPR_BINARY_ISLESSGREATER:
1583 case EXPR_BINARY_ISUNORDERED:
1584 return is_constant_expression(expression->binary.left)
1585 && is_constant_expression(expression->binary.right);
1587 case EXPR_COMPOUND_LITERAL:
1588 return is_constant_initializer(expression->compound_literal.initializer);
1590 case EXPR_CONDITIONAL: {
1591 expression_t *condition = expression->conditional.condition;
1592 if(!is_constant_expression(condition))
1595 long val = fold_constant(condition);
1597 return is_constant_expression(expression->conditional.true_expression);
1599 return is_constant_expression(expression->conditional.false_expression);
1602 case EXPR_ARRAY_ACCESS:
1603 return is_constant_expression(expression->array_access.array_ref)
1604 && is_constant_expression(expression->array_access.index);
1606 case EXPR_REFERENCE: {
1607 declaration_t *declaration = expression->reference.declaration;
1608 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY)
1620 panic("invalid expression found (is constant expression)");
1624 * Initialize the AST construction.
1628 obstack_init(&ast_obstack);
1636 obstack_free(&ast_obstack, NULL);
1640 * Set the output stream for the AST printer.
1642 * @param stream the output stream
1644 void ast_set_output(FILE *stream)
1647 type_set_output(stream);
1651 * Allocate an AST object of the given size.
1653 * @param size the size of the object to allocate
1655 * @return A new allocated object in the AST memeory space.
1657 void *(allocate_ast)(size_t size)
1659 return _allocate_ast(size);