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_CONST] = PREC_PRIM,
83 [EXPR_STRING_LITERAL] = PREC_PRIM,
84 [EXPR_WIDE_STRING_LITERAL] = PREC_PRIM,
85 [EXPR_CALL] = PREC_PRIM,
86 [EXPR_CONDITIONAL] = PREC_COND,
87 [EXPR_SELECT] = PREC_ACCESS,
88 [EXPR_ARRAY_ACCESS] = PREC_ACCESS,
89 [EXPR_SIZEOF] = PREC_UNARY,
90 [EXPR_CLASSIFY_TYPE] = PREC_UNARY,
91 [EXPR_ALIGNOF] = PREC_UNARY,
93 [EXPR_FUNCTION] = PREC_PRIM,
94 [EXPR_PRETTY_FUNCTION] = PREC_PRIM,
95 [EXPR_BUILTIN_SYMBOL] = PREC_PRIM,
96 [EXPR_BUILTIN_CONSTANT_P] = PREC_PRIM,
97 [EXPR_BUILTIN_PREFETCH] = PREC_PRIM,
98 [EXPR_OFFSETOF] = PREC_PRIM,
99 [EXPR_VA_START] = PREC_PRIM,
100 [EXPR_VA_ARG] = PREC_PRIM,
101 [EXPR_STATEMENT] = PREC_ACCESS,
103 [EXPR_UNARY_NEGATE] = PREC_UNARY,
104 [EXPR_UNARY_PLUS] = PREC_UNARY,
105 [EXPR_UNARY_BITWISE_NEGATE] = PREC_UNARY,
106 [EXPR_UNARY_NOT] = PREC_UNARY,
107 [EXPR_UNARY_DEREFERENCE] = PREC_UNARY,
108 [EXPR_UNARY_TAKE_ADDRESS] = PREC_UNARY,
109 [EXPR_UNARY_POSTFIX_INCREMENT] = PREC_UNARY,
110 [EXPR_UNARY_POSTFIX_DECREMENT] = PREC_UNARY,
111 [EXPR_UNARY_PREFIX_INCREMENT] = PREC_UNARY,
112 [EXPR_UNARY_PREFIX_DECREMENT] = PREC_UNARY,
113 [EXPR_UNARY_CAST] = PREC_UNARY,
114 [EXPR_UNARY_CAST_IMPLICIT] = PREC_UNARY,
115 [EXPR_UNARY_ASSUME] = PREC_PRIM,
116 [EXPR_UNARY_BITFIELD_EXTRACT] = PREC_ACCESS,
118 [EXPR_BINARY_ADD] = PREC_PLUS,
119 [EXPR_BINARY_SUB] = PREC_PLUS,
120 [EXPR_BINARY_MUL] = PREC_MUL,
121 [EXPR_BINARY_DIV] = PREC_MUL,
122 [EXPR_BINARY_MOD] = PREC_MUL,
123 [EXPR_BINARY_EQUAL] = PREC_EQ,
124 [EXPR_BINARY_NOTEQUAL] = PREC_EQ,
125 [EXPR_BINARY_LESS] = PREC_CMP,
126 [EXPR_BINARY_LESSEQUAL] = PREC_CMP,
127 [EXPR_BINARY_GREATER] = PREC_CMP,
128 [EXPR_BINARY_GREATEREQUAL] = PREC_CMP,
129 [EXPR_BINARY_BITWISE_AND] = PREC_BIT_AND,
130 [EXPR_BINARY_BITWISE_OR] = PREC_BIT_OR,
131 [EXPR_BINARY_BITWISE_XOR] = PREC_BIT_XOR,
132 [EXPR_BINARY_LOGICAL_AND] = PREC_LOG_AND,
133 [EXPR_BINARY_LOGICAL_OR] = PREC_LOG_OR,
134 [EXPR_BINARY_SHIFTLEFT] = PREC_SHF,
135 [EXPR_BINARY_SHIFTRIGHT] = PREC_SHF,
136 [EXPR_BINARY_ASSIGN] = PREC_ASSIGN,
137 [EXPR_BINARY_MUL_ASSIGN] = PREC_ASSIGN,
138 [EXPR_BINARY_DIV_ASSIGN] = PREC_ASSIGN,
139 [EXPR_BINARY_MOD_ASSIGN] = PREC_ASSIGN,
140 [EXPR_BINARY_ADD_ASSIGN] = PREC_ASSIGN,
141 [EXPR_BINARY_SUB_ASSIGN] = PREC_ASSIGN,
142 [EXPR_BINARY_SHIFTLEFT_ASSIGN] = PREC_ASSIGN,
143 [EXPR_BINARY_SHIFTRIGHT_ASSIGN] = PREC_ASSIGN,
144 [EXPR_BINARY_BITWISE_AND_ASSIGN] = PREC_ASSIGN,
145 [EXPR_BINARY_BITWISE_XOR_ASSIGN] = PREC_ASSIGN,
146 [EXPR_BINARY_BITWISE_OR_ASSIGN] = PREC_ASSIGN,
147 [EXPR_BINARY_COMMA] = PREC_COMMA,
149 [EXPR_BINARY_BUILTIN_EXPECT] = PREC_PRIM,
150 [EXPR_BINARY_ISGREATER] = PREC_PRIM,
151 [EXPR_BINARY_ISGREATEREQUAL] = PREC_PRIM,
152 [EXPR_BINARY_ISLESS] = PREC_PRIM,
153 [EXPR_BINARY_ISLESSEQUAL] = PREC_PRIM,
154 [EXPR_BINARY_ISLESSGREATER] = PREC_PRIM,
155 [EXPR_BINARY_ISUNORDERED] = PREC_PRIM
158 if ((unsigned)kind >= (sizeof(prec)/sizeof(prec[0]))) {
159 panic("wrong expression kind");
161 unsigned res = prec[kind];
162 if (res == PREC_BOTTOM) {
163 panic("expression kind not defined in get_expression_precedence()");
170 * Print a constant expression.
172 * @param cnst the constant expression
174 static void print_const(const const_expression_t *cnst)
176 if(cnst->base.type == NULL)
179 if(is_type_integer(cnst->base.type)) {
180 fprintf(out, "%lld", cnst->v.int_value);
181 } else if(is_type_float(cnst->base.type)) {
182 fprintf(out, "%Lf", cnst->v.float_value);
187 * Print a quoted string constant.
189 * @param string the string constant
191 static void print_quoted_string(const string_t *const string)
194 const char *end = string->begin + string->size;
195 for (const char *c = string->begin; c != end; ++c) {
197 case '\"': fputs("\\\"", out); break;
198 case '\\': fputs("\\\\", out); break;
199 case '\a': fputs("\\a", out); break;
200 case '\b': fputs("\\b", out); break;
201 case '\f': fputs("\\f", out); break;
202 case '\n': fputs("\\n", out); break;
203 case '\r': fputs("\\r", out); break;
204 case '\t': fputs("\\t", out); break;
205 case '\v': fputs("\\v", out); break;
206 case '\?': fputs("\\?", out); break;
209 fprintf(out, "\\%03o", *c);
220 * Prints a string literal expression.
222 * @param string_literal the string literal expression
224 static void print_string_literal(
225 const string_literal_expression_t *string_literal)
227 print_quoted_string(&string_literal->value);
231 * Prints a wide string literal expression.
233 * @param wstr the wide string literal expression
235 static void print_wide_string_literal(
236 const wide_string_literal_expression_t *const wstr)
239 for (const wchar_rep_t *c = wstr->value.begin,
240 *end = c + wstr->value.size;
243 case L'\"': fputs("\\\"", out); break;
244 case L'\\': fputs("\\\\", out); break;
245 case L'\a': fputs("\\a", out); break;
246 case L'\b': fputs("\\b", out); break;
247 case L'\f': fputs("\\f", out); break;
248 case L'\n': fputs("\\n", out); break;
249 case L'\r': fputs("\\r", out); break;
250 case L'\t': fputs("\\t", out); break;
251 case L'\v': fputs("\\v", out); break;
252 case L'\?': fputs("\\?", out); break;
254 const unsigned tc = *c;
257 fprintf(out, "\\%03o", (char)*c);
261 } else if (tc < 0x800) {
262 fputc(0xC0 | (tc >> 6), out);
263 fputc(0x80 | (tc & 0x3F), out);
264 } else if (tc < 0x10000) {
265 fputc(0xE0 | ( tc >> 12), out);
266 fputc(0x80 | ((tc >> 6) & 0x3F), out);
267 fputc(0x80 | ( tc & 0x3F), out);
269 fputc(0xF0 | ( tc >> 18), out);
270 fputc(0x80 | ((tc >> 12) & 0x3F), out);
271 fputc(0x80 | ((tc >> 6) & 0x3F), out);
272 fputc(0x80 | ( tc & 0x3F), out);
281 * Prints a call expression.
283 * @param call the call expression
285 static void print_call_expression(const call_expression_t *call)
287 unsigned prec = get_expression_precedence(call->base.kind);
288 print_expression_prec(call->function, prec);
290 call_argument_t *argument = call->arguments;
292 while(argument != NULL) {
298 print_expression_prec(argument->expression, PREC_COMMA + 1);
300 argument = argument->next;
306 * Prints a binary expression.
308 * @param binexpr the binary expression
310 static void print_binary_expression(const binary_expression_t *binexpr)
312 unsigned prec = get_expression_precedence(binexpr->base.kind);
313 int r2l = right_to_left(prec);
315 if(binexpr->base.kind == EXPR_BINARY_BUILTIN_EXPECT) {
316 fputs("__builtin_expect(", out);
317 print_expression_prec(binexpr->left, prec);
319 print_expression_prec(binexpr->right, prec);
324 print_expression_prec(binexpr->left, prec + r2l);
325 if (binexpr->base.kind != EXPR_BINARY_COMMA) {
328 switch (binexpr->base.kind) {
329 case EXPR_BINARY_COMMA: fputs(",", out); break;
330 case EXPR_BINARY_ASSIGN: fputs("=", out); break;
331 case EXPR_BINARY_ADD: fputs("+", out); break;
332 case EXPR_BINARY_SUB: fputs("-", out); break;
333 case EXPR_BINARY_MUL: fputs("*", out); break;
334 case EXPR_BINARY_MOD: fputs("%", out); break;
335 case EXPR_BINARY_DIV: fputs("/", out); break;
336 case EXPR_BINARY_BITWISE_OR: fputs("|", out); break;
337 case EXPR_BINARY_BITWISE_AND: fputs("&", out); break;
338 case EXPR_BINARY_BITWISE_XOR: fputs("^", out); break;
339 case EXPR_BINARY_LOGICAL_OR: fputs("||", out); break;
340 case EXPR_BINARY_LOGICAL_AND: fputs("&&", out); break;
341 case EXPR_BINARY_NOTEQUAL: fputs("!=", out); break;
342 case EXPR_BINARY_EQUAL: fputs("==", out); break;
343 case EXPR_BINARY_LESS: fputs("<", out); break;
344 case EXPR_BINARY_LESSEQUAL: fputs("<=", out); break;
345 case EXPR_BINARY_GREATER: fputs(">", out); break;
346 case EXPR_BINARY_GREATEREQUAL: fputs(">=", out); break;
347 case EXPR_BINARY_SHIFTLEFT: fputs("<<", out); break;
348 case EXPR_BINARY_SHIFTRIGHT: fputs(">>", out); break;
350 case EXPR_BINARY_ADD_ASSIGN: fputs("+=", out); break;
351 case EXPR_BINARY_SUB_ASSIGN: fputs("-=", out); break;
352 case EXPR_BINARY_MUL_ASSIGN: fputs("*=", out); break;
353 case EXPR_BINARY_MOD_ASSIGN: fputs("%=", out); break;
354 case EXPR_BINARY_DIV_ASSIGN: fputs("/=", out); break;
355 case EXPR_BINARY_BITWISE_OR_ASSIGN: fputs("|=", out); break;
356 case EXPR_BINARY_BITWISE_AND_ASSIGN: fputs("&=", out); break;
357 case EXPR_BINARY_BITWISE_XOR_ASSIGN: fputs("^=", out); break;
358 case EXPR_BINARY_SHIFTLEFT_ASSIGN: fputs("<<=", out); break;
359 case EXPR_BINARY_SHIFTRIGHT_ASSIGN: fputs(">>=", out); break;
360 default: panic("invalid binexpression found");
363 print_expression_prec(binexpr->right, prec - r2l);
367 * Prints an unary expression.
369 * @param unexpr the unary expression
371 static void print_unary_expression(const unary_expression_t *unexpr)
373 unsigned prec = get_expression_precedence(unexpr->base.kind);
374 switch(unexpr->base.kind) {
375 case EXPR_UNARY_NEGATE: fputs("-", out); break;
376 case EXPR_UNARY_PLUS: fputs("+", out); break;
377 case EXPR_UNARY_NOT: fputs("!", out); break;
378 case EXPR_UNARY_BITWISE_NEGATE: fputs("~", out); break;
379 case EXPR_UNARY_PREFIX_INCREMENT: fputs("++", out); break;
380 case EXPR_UNARY_PREFIX_DECREMENT: fputs("--", out); break;
381 case EXPR_UNARY_DEREFERENCE: fputs("*", out); break;
382 case EXPR_UNARY_TAKE_ADDRESS: fputs("&", out); break;
384 case EXPR_UNARY_BITFIELD_EXTRACT:
385 print_expression_prec(unexpr->value, prec);
388 case EXPR_UNARY_POSTFIX_INCREMENT:
389 print_expression_prec(unexpr->value, prec);
392 case EXPR_UNARY_POSTFIX_DECREMENT:
393 print_expression_prec(unexpr->value, prec);
396 case EXPR_UNARY_CAST_IMPLICIT:
397 if(!print_implicit_casts) {
398 print_expression_prec(unexpr->value, prec);
402 case EXPR_UNARY_CAST:
404 print_type(unexpr->base.type);
407 case EXPR_UNARY_ASSUME:
408 fputs("__assume(", out);
409 print_expression_prec(unexpr->value, PREC_COMMA + 1);
413 panic("invalid unary expression found");
415 print_expression_prec(unexpr->value, prec);
419 * Prints a reference expression.
421 * @param ref the reference expression
423 static void print_reference_expression(const reference_expression_t *ref)
425 fprintf(out, "%s", ref->declaration->symbol->string);
429 * Prints an array expression.
431 * @param expression the array expression
433 static void print_array_expression(const array_access_expression_t *expression)
435 unsigned prec = get_expression_precedence(expression->base.kind);
436 if(!expression->flipped) {
437 print_expression_prec(expression->array_ref, prec);
439 print_expression_prec(expression->index, prec);
442 print_expression_prec(expression->index, prec);
444 print_expression_prec(expression->array_ref, prec);
450 * Prints a typeproperty expression (sizeof or __alignof__).
452 * @param expression the type property expression
454 static void print_typeprop_expression(const typeprop_expression_t *expression)
456 if (expression->base.kind == EXPR_SIZEOF) {
457 fputs("sizeof", out);
459 assert(expression->base.kind == EXPR_ALIGNOF);
460 fputs("__alignof__", out);
462 if(expression->tp_expression != NULL) {
463 /* always print the '()' here, sizeof x is right but unusual */
465 print_expression_prec(expression->tp_expression, PREC_ACCESS);
469 print_type(expression->type);
475 * Prints an builtin symbol.
477 * @param expression the builtin symbol expression
479 static void print_builtin_symbol(const builtin_symbol_expression_t *expression)
481 fputs(expression->symbol->string, out);
485 * Prints a builtin constant expression.
487 * @param expression the builtin constant expression
489 static void print_builtin_constant(const builtin_constant_expression_t *expression)
491 fputs("__builtin_constant_p(", out);
492 print_expression_prec(expression->value, PREC_COMMA + 1);
497 * Prints a builtin prefetch expression.
499 * @param expression the builtin prefetch expression
501 static void print_builtin_prefetch(const builtin_prefetch_expression_t *expression)
503 fputs("__builtin_prefetch(", out);
504 print_expression_prec(expression->adr, PREC_COMMA + 1);
505 if (expression->rw) {
507 print_expression_prec(expression->rw, PREC_COMMA + 1);
509 if (expression->locality) {
511 print_expression_prec(expression->locality, PREC_COMMA + 1);
517 * Prints a conditional expression.
519 * @param expression the conditional expression
521 static void print_conditional(const conditional_expression_t *expression)
523 unsigned prec = get_expression_precedence(expression->base.kind);
525 print_expression_prec(expression->condition, prec);
527 print_expression_prec(expression->true_expression, prec);
529 print_expression_prec(expression->false_expression, prec);
534 * Prints a va_start expression.
536 * @param expression the va_start expression
538 static void print_va_start(const va_start_expression_t *const expression)
540 fputs("__builtin_va_start(", out);
541 print_expression_prec(expression->ap, PREC_COMMA + 1);
543 fputs(expression->parameter->symbol->string, out);
548 * Prints a va_arg expression.
550 * @param expression the va_arg expression
552 static void print_va_arg(const va_arg_expression_t *expression)
554 fputs("__builtin_va_arg(", out);
555 print_expression_prec(expression->ap, PREC_COMMA + 1);
557 print_type(expression->base.type);
562 * Prints a select expression (. or ->).
564 * @param expression the select expression
566 static void print_select(const select_expression_t *expression)
568 unsigned prec = get_expression_precedence(expression->base.kind);
569 print_expression_prec(expression->compound, prec);
570 if(expression->compound->base.type == NULL ||
571 expression->compound->base.type->kind == TYPE_POINTER) {
576 fputs(expression->symbol->string, out);
580 * Prints a type classify expression.
582 * @param expr the type classify expression
584 static void print_classify_type_expression(
585 const classify_type_expression_t *const expr)
587 fputs("__builtin_classify_type(", out);
588 print_expression_prec(expr->type_expression, PREC_COMMA + 1);
593 * Prints a designator.
595 * @param designator the designator
597 static void print_designator(const designator_t *designator)
599 fputs(designator->symbol->string, out);
600 for (designator = designator->next; designator != NULL; designator = designator->next) {
601 if (designator->array_access) {
603 print_expression_prec(designator->array_access, PREC_ACCESS);
607 fputs(designator->symbol->string, out);
613 * Prints an offsetof expression.
615 * @param expression the offset expression
617 static void print_offsetof_expression(const offsetof_expression_t *expression)
619 fputs("__builtin_offsetof", out);
621 print_type(expression->type);
623 print_designator(expression->designator);
628 * Prints a statement expression.
630 * @param expression the statement expression
632 static void print_statement_expression(const statement_expression_t *expression)
635 print_statement(expression->statement);
640 * Prints an expression with parenthesis if needed.
642 * @param expression the expression to print
643 * @param top_prec the precedence of the user of this expression.
645 static void print_expression_prec(const expression_t *expression, unsigned top_prec)
647 unsigned prec = get_expression_precedence(expression->base.kind);
648 if (print_parenthesis && top_prec != PREC_BOTTOM)
652 switch(expression->kind) {
655 fprintf(out, "*invalid expression*");
658 print_const(&expression->conste);
661 case EXPR_PRETTY_FUNCTION:
662 case EXPR_STRING_LITERAL:
663 print_string_literal(&expression->string);
665 case EXPR_WIDE_STRING_LITERAL:
666 print_wide_string_literal(&expression->wide_string);
669 print_call_expression(&expression->call);
672 print_binary_expression(&expression->binary);
675 print_reference_expression(&expression->reference);
677 case EXPR_ARRAY_ACCESS:
678 print_array_expression(&expression->array_access);
681 print_unary_expression(&expression->unary);
685 print_typeprop_expression(&expression->typeprop);
687 case EXPR_BUILTIN_SYMBOL:
688 print_builtin_symbol(&expression->builtin_symbol);
690 case EXPR_BUILTIN_CONSTANT_P:
691 print_builtin_constant(&expression->builtin_constant);
693 case EXPR_BUILTIN_PREFETCH:
694 print_builtin_prefetch(&expression->builtin_prefetch);
696 case EXPR_CONDITIONAL:
697 print_conditional(&expression->conditional);
700 print_va_start(&expression->va_starte);
703 print_va_arg(&expression->va_arge);
706 print_select(&expression->select);
708 case EXPR_CLASSIFY_TYPE:
709 print_classify_type_expression(&expression->classify_type);
712 print_offsetof_expression(&expression->offsetofe);
715 print_statement_expression(&expression->statement);
720 fprintf(out, "some expression of type %d", (int) expression->kind);
728 * Print an compound statement.
730 * @param block the compound statement
732 static void print_compound_statement(const compound_statement_t *block)
737 statement_t *statement = block->statements;
738 while(statement != NULL) {
739 if (statement->base.kind == STATEMENT_CASE_LABEL)
742 print_statement(statement);
744 statement = statement->base.next;
752 * Print a return statement.
754 * @param statement the return statement
756 static void print_return_statement(const return_statement_t *statement)
758 fprintf(out, "return ");
759 if(statement->value != NULL)
760 print_expression(statement->value);
765 * Print an expression statement.
767 * @param statement the expression statement
769 static void print_expression_statement(const expression_statement_t *statement)
771 print_expression(statement->expression);
776 * Print a goto statement.
778 * @param statement the goto statement
780 static void print_goto_statement(const goto_statement_t *statement)
782 fprintf(out, "goto ");
783 fputs(statement->label->symbol->string, out);
784 fprintf(stderr, "(%p)", (void*) statement->label);
789 * Print a label statement.
791 * @param statement the label statement
793 static void print_label_statement(const label_statement_t *statement)
795 fprintf(stderr, "(%p)", (void*) statement->label);
796 fprintf(out, "%s:\n", statement->label->symbol->string);
797 if(statement->statement != NULL) {
798 print_statement(statement->statement);
803 * Print an if statement.
805 * @param statement the if statement
807 static void print_if_statement(const if_statement_t *statement)
810 print_expression(statement->condition);
812 if(statement->true_statement != NULL) {
813 print_statement(statement->true_statement);
816 if(statement->false_statement != NULL) {
819 print_statement(statement->false_statement);
824 * Print a switch statement.
826 * @param statement the switch statement
828 static void print_switch_statement(const switch_statement_t *statement)
830 fputs("switch(", out);
831 print_expression(statement->expression);
833 print_statement(statement->body);
837 * Print a case label (including the default label).
839 * @param statement the case label statement
841 static void print_case_label(const case_label_statement_t *statement)
843 if(statement->expression == NULL) {
844 fputs("default:\n", out);
847 print_expression(statement->expression);
848 if (statement->end_range != NULL) {
850 print_expression(statement->end_range);
855 if(statement->statement != NULL) {
856 if (statement->statement->base.kind == STATEMENT_CASE_LABEL) {
860 print_statement(statement->statement);
865 * Print a declaration statement.
867 * @param statement the statement
869 static void print_declaration_statement(
870 const declaration_statement_t *statement)
873 declaration_t *declaration = statement->declarations_begin;
874 for( ; declaration != statement->declarations_end->next;
875 declaration = declaration->next) {
881 print_declaration(declaration);
887 * Print a while statement.
889 * @param statement the statement
891 static void print_while_statement(const while_statement_t *statement)
893 fputs("while(", out);
894 print_expression(statement->condition);
896 print_statement(statement->body);
900 * Print a do-while statement.
902 * @param statement the statement
904 static void print_do_while_statement(const do_while_statement_t *statement)
907 print_statement(statement->body);
909 fputs("while(", out);
910 print_expression(statement->condition);
915 * Print a for statement.
917 * @param statement the statement
919 static void print_for_statement(const for_statement_t *statement)
922 if(statement->scope.declarations != NULL) {
923 assert(statement->initialisation == NULL);
924 print_declaration(statement->scope.declarations);
925 if(statement->scope.declarations->next != NULL) {
926 panic("multiple declarations in for statement not supported yet");
930 if(statement->initialisation) {
931 print_expression(statement->initialisation);
935 if(statement->condition != NULL) {
936 print_expression(statement->condition);
939 if(statement->step != NULL) {
940 print_expression(statement->step);
943 print_statement(statement->body);
947 * Print assembler constraints.
949 * @param constraints the constraints
951 static void print_asm_constraints(asm_constraint_t *constraints)
953 asm_constraint_t *constraint = constraints;
954 for( ; constraint != NULL; constraint = constraint->next) {
955 if(constraint != constraints)
958 if(constraint->symbol) {
959 fprintf(out, "[%s] ", constraint->symbol->string);
961 print_quoted_string(&constraint->constraints);
963 print_expression(constraint->expression);
969 * Print assembler clobbers.
971 * @param clobbers the clobbers
973 static void print_asm_clobbers(asm_clobber_t *clobbers)
975 asm_clobber_t *clobber = clobbers;
976 for( ; clobber != NULL; clobber = clobber->next) {
977 if(clobber != clobbers)
980 print_quoted_string(&clobber->clobber);
985 * Print an assembler statement.
987 * @param statement the statement
989 static void print_asm_statement(const asm_statement_t *statement)
992 if(statement->is_volatile) {
993 fputs("volatile ", out);
996 print_quoted_string(&statement->asm_text);
997 if(statement->inputs == NULL && statement->outputs == NULL
998 && statement->clobbers == NULL)
999 goto end_of_print_asm_statement;
1002 print_asm_constraints(statement->inputs);
1003 if(statement->outputs == NULL && statement->clobbers == NULL)
1004 goto end_of_print_asm_statement;
1007 print_asm_constraints(statement->outputs);
1008 if(statement->clobbers == NULL)
1009 goto end_of_print_asm_statement;
1012 print_asm_clobbers(statement->clobbers);
1014 end_of_print_asm_statement:
1019 * Print a statement.
1021 * @param statement the statement
1023 void print_statement(const statement_t *statement)
1025 switch(statement->kind) {
1026 case STATEMENT_COMPOUND:
1027 print_compound_statement(&statement->compound);
1029 case STATEMENT_RETURN:
1030 print_return_statement(&statement->returns);
1032 case STATEMENT_EXPRESSION:
1033 print_expression_statement(&statement->expression);
1035 case STATEMENT_LABEL:
1036 print_label_statement(&statement->label);
1038 case STATEMENT_GOTO:
1039 print_goto_statement(&statement->gotos);
1041 case STATEMENT_CONTINUE:
1042 fputs("continue;\n", out);
1044 case STATEMENT_BREAK:
1045 fputs("break;\n", out);
1048 print_if_statement(&statement->ifs);
1050 case STATEMENT_SWITCH:
1051 print_switch_statement(&statement->switchs);
1053 case STATEMENT_CASE_LABEL:
1054 print_case_label(&statement->case_label);
1056 case STATEMENT_DECLARATION:
1057 print_declaration_statement(&statement->declaration);
1059 case STATEMENT_WHILE:
1060 print_while_statement(&statement->whiles);
1062 case STATEMENT_DO_WHILE:
1063 print_do_while_statement(&statement->do_while);
1066 print_for_statement(&statement->fors);
1069 print_asm_statement(&statement->asms);
1071 case STATEMENT_INVALID:
1072 fprintf(out, "*invalid statement*");
1078 * Print a storage class.
1080 * @param storage_class the storage class
1082 static void print_storage_class(unsigned storage_class)
1084 switch((storage_class_tag_t) storage_class) {
1085 case STORAGE_CLASS_ENUM_ENTRY:
1086 case STORAGE_CLASS_NONE:
1088 case STORAGE_CLASS_TYPEDEF: fputs("typedef ", out); break;
1089 case STORAGE_CLASS_EXTERN: fputs("extern ", out); break;
1090 case STORAGE_CLASS_STATIC: fputs("static ", out); break;
1091 case STORAGE_CLASS_AUTO: fputs("auto ", out); break;
1092 case STORAGE_CLASS_REGISTER: fputs("register ", out); break;
1093 case STORAGE_CLASS_THREAD: fputs("__thread", out); break;
1094 case STORAGE_CLASS_THREAD_EXTERN: fputs("extern __thread", out); break;
1095 case STORAGE_CLASS_THREAD_STATIC: fputs("static __thread", out); break;
1100 * Print an initializer.
1102 * @param initializer the initializer
1104 void print_initializer(const initializer_t *initializer)
1106 if(initializer->kind == INITIALIZER_VALUE) {
1107 const initializer_value_t *value = &initializer->value;
1108 print_expression(value->value);
1112 assert(initializer->kind == INITIALIZER_LIST);
1114 const initializer_list_t *list = &initializer->list;
1116 for(size_t i = 0 ; i < list->len; ++i) {
1120 print_initializer(list->initializers[i]);
1126 * Print a declaration in the NORMAL namespace.
1128 * @param declaration the declaration
1130 static void print_normal_declaration(const declaration_t *declaration)
1132 print_storage_class(declaration->storage_class);
1133 if(declaration->is_inline) {
1134 if (declaration->modifiers & DM_FORCEINLINE)
1135 fputs("__forceinline ", out);
1137 fputs("inline ", out);
1139 print_type_ext(declaration->type, declaration->symbol,
1140 &declaration->scope);
1142 if(declaration->type->kind == TYPE_FUNCTION) {
1143 if(declaration->init.statement != NULL) {
1145 print_statement(declaration->init.statement);
1148 } else if(declaration->init.initializer != NULL) {
1150 print_initializer(declaration->init.initializer);
1156 * Prints an expression.
1158 * @param expression the expression
1160 void print_expression(const expression_t *expression) {
1161 print_expression_prec(expression, PREC_BOTTOM);
1165 * Print a declaration.
1167 * @param declaration the declaration
1169 void print_declaration(const declaration_t *declaration)
1171 if(declaration->namespc != NAMESPACE_NORMAL &&
1172 declaration->symbol == NULL)
1175 switch(declaration->namespc) {
1176 case NAMESPACE_NORMAL:
1177 print_normal_declaration(declaration);
1179 case NAMESPACE_STRUCT:
1180 fputs("struct ", out);
1181 fputs(declaration->symbol->string, out);
1183 print_compound_definition(declaration);
1186 case NAMESPACE_UNION:
1187 fputs("union ", out);
1188 fputs(declaration->symbol->string, out);
1190 print_compound_definition(declaration);
1193 case NAMESPACE_ENUM:
1194 fputs("enum ", out);
1195 fputs(declaration->symbol->string, out);
1197 print_enum_definition(declaration);
1204 * Print the AST of a translation unit.
1206 * @param unit the translation unit
1208 void print_ast(const translation_unit_t *unit)
1212 declaration_t *declaration = unit->scope.declarations;
1213 for( ; declaration != NULL; declaration = declaration->next) {
1214 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY)
1216 if(declaration->namespc != NAMESPACE_NORMAL &&
1217 declaration->symbol == NULL)
1221 print_declaration(declaration);
1227 * Returns true if a given expression is a compile time
1230 * @param expression the expression to check
1232 bool is_constant_expression(const expression_t *expression)
1234 switch(expression->kind) {
1237 case EXPR_STRING_LITERAL:
1238 case EXPR_WIDE_STRING_LITERAL:
1240 case EXPR_CLASSIFY_TYPE:
1242 case EXPR_PRETTY_FUNCTION:
1245 case EXPR_BUILTIN_CONSTANT_P:
1248 case EXPR_BUILTIN_SYMBOL:
1249 case EXPR_BUILTIN_PREFETCH:
1254 case EXPR_STATEMENT:
1255 case EXPR_UNARY_POSTFIX_INCREMENT:
1256 case EXPR_UNARY_POSTFIX_DECREMENT:
1257 case EXPR_UNARY_PREFIX_INCREMENT:
1258 case EXPR_UNARY_PREFIX_DECREMENT:
1259 case EXPR_UNARY_BITFIELD_EXTRACT:
1260 case EXPR_UNARY_ASSUME: /* has VOID type */
1261 case EXPR_BINARY_ASSIGN:
1262 case EXPR_BINARY_MUL_ASSIGN:
1263 case EXPR_BINARY_DIV_ASSIGN:
1264 case EXPR_BINARY_MOD_ASSIGN:
1265 case EXPR_BINARY_ADD_ASSIGN:
1266 case EXPR_BINARY_SUB_ASSIGN:
1267 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1268 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1269 case EXPR_BINARY_BITWISE_AND_ASSIGN:
1270 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
1271 case EXPR_BINARY_BITWISE_OR_ASSIGN:
1272 case EXPR_BINARY_COMMA:
1275 case EXPR_UNARY_NEGATE:
1276 case EXPR_UNARY_PLUS:
1277 case EXPR_UNARY_BITWISE_NEGATE:
1278 case EXPR_UNARY_NOT:
1279 case EXPR_UNARY_DEREFERENCE:
1280 case EXPR_UNARY_TAKE_ADDRESS:
1281 case EXPR_UNARY_CAST:
1282 case EXPR_UNARY_CAST_IMPLICIT:
1283 return is_constant_expression(expression->unary.value);
1285 case EXPR_BINARY_ADD:
1286 case EXPR_BINARY_SUB:
1287 case EXPR_BINARY_MUL:
1288 case EXPR_BINARY_DIV:
1289 case EXPR_BINARY_MOD:
1290 case EXPR_BINARY_EQUAL:
1291 case EXPR_BINARY_NOTEQUAL:
1292 case EXPR_BINARY_LESS:
1293 case EXPR_BINARY_LESSEQUAL:
1294 case EXPR_BINARY_GREATER:
1295 case EXPR_BINARY_GREATEREQUAL:
1296 case EXPR_BINARY_BITWISE_AND:
1297 case EXPR_BINARY_BITWISE_OR:
1298 case EXPR_BINARY_BITWISE_XOR:
1299 case EXPR_BINARY_LOGICAL_AND:
1300 case EXPR_BINARY_LOGICAL_OR:
1301 case EXPR_BINARY_SHIFTLEFT:
1302 case EXPR_BINARY_SHIFTRIGHT:
1303 case EXPR_BINARY_BUILTIN_EXPECT:
1304 case EXPR_BINARY_ISGREATER:
1305 case EXPR_BINARY_ISGREATEREQUAL:
1306 case EXPR_BINARY_ISLESS:
1307 case EXPR_BINARY_ISLESSEQUAL:
1308 case EXPR_BINARY_ISLESSGREATER:
1309 case EXPR_BINARY_ISUNORDERED:
1310 return is_constant_expression(expression->binary.left)
1311 && is_constant_expression(expression->binary.right);
1313 case EXPR_CONDITIONAL:
1314 /* TODO: not correct, we only have to test expressions which are
1315 * evaluated, which means either the true or false part might be not
1317 return is_constant_expression(expression->conditional.condition)
1318 && is_constant_expression(expression->conditional.true_expression)
1319 && is_constant_expression(expression->conditional.false_expression);
1321 case EXPR_ARRAY_ACCESS:
1322 return is_constant_expression(expression->array_access.array_ref)
1323 && is_constant_expression(expression->array_access.index);
1325 case EXPR_REFERENCE: {
1326 declaration_t *declaration = expression->reference.declaration;
1327 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY)
1337 panic("invalid expression found (is constant expression)");
1341 * Initialize the AST construction.
1345 obstack_init(&ast_obstack);
1353 obstack_free(&ast_obstack, NULL);
1357 * Set the output stream for the AST printer.
1359 * @param stream the output stream
1361 void ast_set_output(FILE *stream)
1364 type_set_output(stream);
1368 * Allocate an AST object of the given size.
1370 * @param size the size of the object to allocate
1372 * @return A new allocated object in the AST memeory space.
1374 void *(allocate_ast)(size_t size)
1376 return _allocate_ast(size);