X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ast.c;h=4bf325829c0182c6c19b9d4b7474155ac79f0bc0;hb=c82bb755ba4e0d51d7edfdab7af98bc47eca6f62;hp=8b9fd7e27093615f20982b96c108f2324d68621c;hpb=0cefeeb021ee145eb92a292a489cc22e55e6e712;p=cparser diff --git a/ast.c b/ast.c index 8b9fd7e..4bf3258 100644 --- a/ast.c +++ b/ast.c @@ -60,6 +60,8 @@ enum precedence_t { /** * Returns 1 if a given precedence level has right-to-left * associativity, else -1. + * + * @param precedence the operator precedence */ static int right_to_left(unsigned precedence) { return (precedence == PREC_ASSIGN || precedence == PREC_COND || @@ -67,7 +69,9 @@ static int right_to_left(unsigned precedence) { } /** - * Return the precedence of an expression. + * Return the precedence of an expression given by its kind. + * + * @param kind the expression kind */ static unsigned get_expression_precedence(expression_kind_t kind) { @@ -75,6 +79,7 @@ static unsigned get_expression_precedence(expression_kind_t kind) [EXPR_UNKNOWN] = PREC_PRIM, [EXPR_INVALID] = PREC_PRIM, [EXPR_REFERENCE] = PREC_PRIM, + [EXPR_CHAR_CONST] = PREC_PRIM, [EXPR_CONST] = PREC_PRIM, [EXPR_STRING_LITERAL] = PREC_PRIM, [EXPR_WIDE_STRING_LITERAL] = PREC_PRIM, @@ -164,29 +169,40 @@ static unsigned get_expression_precedence(expression_kind_t kind) /** * Print a constant expression. + * + * @param cnst the constant expression */ static void print_const(const const_expression_t *cnst) { if(cnst->base.type == NULL) return; - if(is_type_integer(cnst->base.type)) { + const type_t *const type = skip_typeref(cnst->base.type); + + if (is_type_integer(type)) { fprintf(out, "%lld", cnst->v.int_value); - } else if(is_type_float(cnst->base.type)) { + } else if (is_type_float(type)) { fprintf(out, "%Lf", cnst->v.float_value); + } else { + panic("unknown constant"); } } /** * Print a quoted string constant. + * + * @param string the string constant + * @param border the border char */ -static void print_quoted_string(const string_t *const string) +static void print_quoted_string(const string_t *const string, char border) { - fputc('"', out); + fputc(border, out); const char *end = string->begin + string->size; for (const char *c = string->begin; c != end; ++c) { + if (*c == border) { + fputc('\\', out); + } switch(*c) { - case '\"': fputs("\\\"", out); break; case '\\': fputs("\\\\", out); break; case '\a': fputs("\\a", out); break; case '\b': fputs("\\b", out); break; @@ -205,20 +221,34 @@ static void print_quoted_string(const string_t *const string) break; } } - fputc('"', out); + fputc(border, out); +} + +/** + * Print a constant character expression. + * + * @param cnst the constant character expression + */ +static void print_char_const(const const_expression_t *cnst) +{ + print_quoted_string(&cnst->v.chars, '\''); } /** * Prints a string literal expression. + * + * @param string_literal the string literal expression */ static void print_string_literal( const string_literal_expression_t *string_literal) { - print_quoted_string(&string_literal->value); + print_quoted_string(&string_literal->value, '"'); } /** * Prints a wide string literal expression. + * + * @param wstr the wide string literal expression */ static void print_wide_string_literal( const wide_string_literal_expression_t *const wstr) @@ -267,6 +297,8 @@ static void print_wide_string_literal( /** * Prints a call expression. + * + * @param call the call expression */ static void print_call_expression(const call_expression_t *call) { @@ -290,6 +322,8 @@ static void print_call_expression(const call_expression_t *call) /** * Prints a binary expression. + * + * @param binexpr the binary expression */ static void print_binary_expression(const binary_expression_t *binexpr) { @@ -349,6 +383,8 @@ static void print_binary_expression(const binary_expression_t *binexpr) /** * Prints an unary expression. + * + * @param unexpr the unary expression */ static void print_unary_expression(const unary_expression_t *unexpr) { @@ -399,6 +435,8 @@ static void print_unary_expression(const unary_expression_t *unexpr) /** * Prints a reference expression. + * + * @param ref the reference expression */ static void print_reference_expression(const reference_expression_t *ref) { @@ -407,6 +445,8 @@ static void print_reference_expression(const reference_expression_t *ref) /** * Prints an array expression. + * + * @param expression the array expression */ static void print_array_expression(const array_access_expression_t *expression) { @@ -425,7 +465,9 @@ static void print_array_expression(const array_access_expression_t *expression) } /** - * Prints a typeproperty expression. + * Prints a typeproperty expression (sizeof or __alignof__). + * + * @param expression the type property expression */ static void print_typeprop_expression(const typeprop_expression_t *expression) { @@ -448,7 +490,9 @@ static void print_typeprop_expression(const typeprop_expression_t *expression) } /** - * Prints an builtin symbol + * Prints an builtin symbol. + * + * @param expression the builtin symbol expression */ static void print_builtin_symbol(const builtin_symbol_expression_t *expression) { @@ -457,6 +501,8 @@ static void print_builtin_symbol(const builtin_symbol_expression_t *expression) /** * Prints a builtin constant expression. + * + * @param expression the builtin constant expression */ static void print_builtin_constant(const builtin_constant_expression_t *expression) { @@ -467,6 +513,8 @@ static void print_builtin_constant(const builtin_constant_expression_t *expressi /** * Prints a builtin prefetch expression. + * + * @param expression the builtin prefetch expression */ static void print_builtin_prefetch(const builtin_prefetch_expression_t *expression) { @@ -485,6 +533,8 @@ static void print_builtin_prefetch(const builtin_prefetch_expression_t *expressi /** * Prints a conditional expression. + * + * @param expression the conditional expression */ static void print_conditional(const conditional_expression_t *expression) { @@ -500,6 +550,8 @@ static void print_conditional(const conditional_expression_t *expression) /** * Prints a va_start expression. + * + * @param expression the va_start expression */ static void print_va_start(const va_start_expression_t *const expression) { @@ -512,6 +564,8 @@ static void print_va_start(const va_start_expression_t *const expression) /** * Prints a va_arg expression. + * + * @param expression the va_arg expression */ static void print_va_arg(const va_arg_expression_t *expression) { @@ -523,7 +577,9 @@ static void print_va_arg(const va_arg_expression_t *expression) } /** - * Prints a select expression. + * Prints a select expression (. or ->). + * + * @param expression the select expression */ static void print_select(const select_expression_t *expression) { @@ -540,6 +596,8 @@ static void print_select(const select_expression_t *expression) /** * Prints a type classify expression. + * + * @param expr the type classify expression */ static void print_classify_type_expression( const classify_type_expression_t *const expr) @@ -549,6 +607,11 @@ static void print_classify_type_expression( fputc(')', out); } +/** + * Prints a designator. + * + * @param designator the designator + */ static void print_designator(const designator_t *designator) { fputs(designator->symbol->string, out); @@ -565,7 +628,9 @@ static void print_designator(const designator_t *designator) } /** - * Prints an offsetof classify expression. + * Prints an offsetof expression. + * + * @param expression the offset expression */ static void print_offsetof_expression(const offsetof_expression_t *expression) { @@ -579,6 +644,8 @@ static void print_offsetof_expression(const offsetof_expression_t *expression) /** * Prints a statement expression. + * + * @param expression the statement expression */ static void print_statement_expression(const statement_expression_t *expression) { @@ -587,6 +654,12 @@ static void print_statement_expression(const statement_expression_t *expression) fputc(')', out); } +/** + * Prints an expression with parenthesis if needed. + * + * @param expression the expression to print + * @param top_prec the precedence of the user of this expression. + */ static void print_expression_prec(const expression_t *expression, unsigned top_prec) { unsigned prec = get_expression_precedence(expression->base.kind); @@ -599,6 +672,9 @@ static void print_expression_prec(const expression_t *expression, unsigned top_p case EXPR_INVALID: fprintf(out, "*invalid expression*"); break; + case EXPR_CHAR_CONST: + print_char_const(&expression->conste); + break; case EXPR_CONST: print_const(&expression->conste); break; @@ -669,6 +745,11 @@ static void print_expression_prec(const expression_t *expression, unsigned top_p fputc(')', out); } +/** + * Print an compound statement. + * + * @param block the compound statement + */ static void print_compound_statement(const compound_statement_t *block) { fputs("{\n", out); @@ -688,20 +769,35 @@ static void print_compound_statement(const compound_statement_t *block) fputs("}\n", out); } +/** + * Print a return statement. + * + * @param statement the return statement + */ static void print_return_statement(const return_statement_t *statement) { fprintf(out, "return "); if(statement->value != NULL) - print_expression_prec(statement->value, PREC_BOTTOM); + print_expression(statement->value); fputs(";\n", out); } +/** + * Print an expression statement. + * + * @param statement the expression statement + */ static void print_expression_statement(const expression_statement_t *statement) { print_expression(statement->expression); fputs(";\n", out); } +/** + * Print a goto statement. + * + * @param statement the goto statement + */ static void print_goto_statement(const goto_statement_t *statement) { fprintf(out, "goto "); @@ -710,6 +806,11 @@ static void print_goto_statement(const goto_statement_t *statement) fputs(";\n", out); } +/** + * Print a label statement. + * + * @param statement the label statement + */ static void print_label_statement(const label_statement_t *statement) { fprintf(stderr, "(%p)", (void*) statement->label); @@ -719,6 +820,11 @@ static void print_label_statement(const label_statement_t *statement) } } +/** + * Print an if statement. + * + * @param statement the if statement + */ static void print_if_statement(const if_statement_t *statement) { fputs("if(", out); @@ -735,6 +841,11 @@ static void print_if_statement(const if_statement_t *statement) } } +/** + * Print a switch statement. + * + * @param statement the switch statement + */ static void print_switch_statement(const switch_statement_t *statement) { fputs("switch(", out); @@ -743,6 +854,11 @@ static void print_switch_statement(const switch_statement_t *statement) print_statement(statement->body); } +/** + * Print a case label (including the default label). + * + * @param statement the case label statement + */ static void print_case_label(const case_label_statement_t *statement) { if(statement->expression == NULL) { @@ -750,6 +866,10 @@ static void print_case_label(const case_label_statement_t *statement) } else { fputs("case ", out); print_expression(statement->expression); + if (statement->end_range != NULL) { + fputs(" ... ", out); + print_expression(statement->end_range); + } fputs(":\n", out); } ++indent; @@ -762,6 +882,11 @@ static void print_case_label(const case_label_statement_t *statement) } } +/** + * Print a declaration statement. + * + * @param statement the statement + */ static void print_declaration_statement( const declaration_statement_t *statement) { @@ -779,6 +904,11 @@ static void print_declaration_statement( } } +/** + * Print a while statement. + * + * @param statement the statement + */ static void print_while_statement(const while_statement_t *statement) { fputs("while(", out); @@ -787,6 +917,11 @@ static void print_while_statement(const while_statement_t *statement) print_statement(statement->body); } +/** + * Print a do-while statement. + * + * @param statement the statement + */ static void print_do_while_statement(const do_while_statement_t *statement) { fputs("do ", out); @@ -797,6 +932,11 @@ static void print_do_while_statement(const do_while_statement_t *statement) fputs(");\n", out); } +/** + * Print a for statement. + * + * @param statement the statement + */ static void print_for_statement(const for_statement_t *statement) { fputs("for(", out); @@ -824,6 +964,11 @@ static void print_for_statement(const for_statement_t *statement) print_statement(statement->body); } +/** + * Print assembler constraints. + * + * @param constraints the constraints + */ static void print_asm_constraints(asm_constraint_t *constraints) { asm_constraint_t *constraint = constraints; @@ -834,13 +979,18 @@ static void print_asm_constraints(asm_constraint_t *constraints) if(constraint->symbol) { fprintf(out, "[%s] ", constraint->symbol->string); } - print_quoted_string(&constraint->constraints); + print_quoted_string(&constraint->constraints, '"'); fputs(" (", out); print_expression(constraint->expression); fputs(")", out); } } +/** + * Print assembler clobbers. + * + * @param clobbers the clobbers + */ static void print_asm_clobbers(asm_clobber_t *clobbers) { asm_clobber_t *clobber = clobbers; @@ -848,10 +998,15 @@ static void print_asm_clobbers(asm_clobber_t *clobbers) if(clobber != clobbers) fputs(", ", out); - print_quoted_string(&clobber->clobber); + print_quoted_string(&clobber->clobber, '"'); } } +/** + * Print an assembler statement. + * + * @param statement the statement + */ static void print_asm_statement(const asm_statement_t *statement) { fputs("asm ", out); @@ -859,7 +1014,7 @@ static void print_asm_statement(const asm_statement_t *statement) fputs("volatile ", out); } fputs("(", out); - print_quoted_string(&statement->asm_text); + print_quoted_string(&statement->asm_text, '"'); if(statement->inputs == NULL && statement->outputs == NULL && statement->clobbers == NULL) goto end_of_print_asm_statement; @@ -881,6 +1036,11 @@ end_of_print_asm_statement: fputs(");\n", out); } +/** + * Print a statement. + * + * @param statement the statement + */ void print_statement(const statement_t *statement) { switch(statement->kind) { @@ -935,6 +1095,11 @@ void print_statement(const statement_t *statement) } } +/** + * Print a storage class. + * + * @param storage_class the storage class + */ static void print_storage_class(unsigned storage_class) { switch((storage_class_tag_t) storage_class) { @@ -952,6 +1117,11 @@ static void print_storage_class(unsigned storage_class) } } +/** + * Print an initializer. + * + * @param initializer the initializer + */ void print_initializer(const initializer_t *initializer) { if(initializer->kind == INITIALIZER_VALUE) { @@ -973,6 +1143,11 @@ void print_initializer(const initializer_t *initializer) fputs("}", out); } +/** + * Print a declaration in the NORMAL namespace. + * + * @param declaration the declaration + */ static void print_normal_declaration(const declaration_t *declaration) { print_storage_class(declaration->storage_class); @@ -1000,11 +1175,18 @@ static void print_normal_declaration(const declaration_t *declaration) /** * Prints an expression. + * + * @param expression the expression */ void print_expression(const expression_t *expression) { print_expression_prec(expression, PREC_BOTTOM); } +/** + * Print a declaration. + * + * @param declaration the declaration + */ void print_declaration(const declaration_t *declaration) { if(declaration->namespc != NAMESPACE_NORMAL && @@ -1039,6 +1221,11 @@ void print_declaration(const declaration_t *declaration) } } +/** + * Print the AST of a translation unit. + * + * @param unit the translation unit + */ void print_ast(const translation_unit_t *unit) { inc_type_visited(); @@ -1057,11 +1244,18 @@ void print_ast(const translation_unit_t *unit) } } +/** + * Returns true if a given expression is a compile time + * constant. + * + * @param expression the expression to check + */ bool is_constant_expression(const expression_t *expression) { switch(expression->kind) { case EXPR_CONST: + case EXPR_CHAR_CONST: case EXPR_STRING_LITERAL: case EXPR_WIDE_STRING_LITERAL: case EXPR_SIZEOF: @@ -1165,24 +1359,41 @@ bool is_constant_expression(const expression_t *expression) panic("invalid expression found (is constant expression)"); } - +/** + * Initialize the AST construction. + */ void init_ast(void) { obstack_init(&ast_obstack); } +/** + * Free the AST. + */ void exit_ast(void) { obstack_free(&ast_obstack, NULL); } +/** + * Set the output stream for the AST printer. + * + * @param stream the output stream + */ void ast_set_output(FILE *stream) { out = stream; type_set_output(stream); } -void* (allocate_ast) (size_t size) +/** + * Allocate an AST object of the given size. + * + * @param size the size of the object to allocate + * + * @return A new allocated object in the AST memeory space. + */ +void *(allocate_ast)(size_t size) { return _allocate_ast(size); }