X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ast.c;h=f2c255113deec80fc7efc53c8f9b057c91a0f83a;hb=578e95b73d0ea28c38bbbef48f49fb00748f522e;hp=0501211f2d6ec74ead6c23cdbcd626011e30d532;hpb=39f74263b168c85781a09d3ca5aed069280fa5cd;p=cparser diff --git a/ast.c b/ast.c index 0501211..f2c2551 100644 --- a/ast.c +++ b/ast.c @@ -1,6 +1,26 @@ +/* + * This file is part of cparser. + * Copyright (C) 2007-2008 Matthias Braun + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA + * 02111-1307, USA. + */ #include #include "ast_t.h" +#include "symbol_t.h" #include "type_t.h" #include @@ -79,7 +99,8 @@ 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_CHARACTER_CONSTANT] = PREC_PRIM, + [EXPR_WIDE_CHARACTER_CONSTANT] = PREC_PRIM, [EXPR_CONST] = PREC_PRIM, [EXPR_STRING_LITERAL] = PREC_PRIM, [EXPR_WIDE_STRING_LITERAL] = PREC_PRIM, @@ -193,7 +214,7 @@ static void print_const(const const_expression_t *cnst) static void print_quoted_string(const string_t *const string, char border) { fputc(border, out); - const char *end = string->begin + string->size; + const char *end = string->begin + string->size - 1; for (const char *c = string->begin; c != end; ++c) { if (*c == border) { fputc('\\', out); @@ -220,36 +241,17 @@ static void print_quoted_string(const string_t *const string, char border) 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, '"'); -} - /** * Prints a wide string literal expression. * * @param wstr the wide string literal expression */ -static void print_quoted_wide_string(const wide_string_t *const wstr) +static void print_quoted_wide_string(const wide_string_t *const wstr, + char border) { - fputs("L\"", out); - for (const wchar_rep_t *c = wstr->begin, *end = wstr->begin + wstr->size; + fputc('L', out); + fputc(border, out); + for (const wchar_rep_t *c = wstr->begin, *end = wstr->begin + wstr->size-1; c != end; ++c) { switch (*c) { case L'\"': fputs("\\\"", out); break; @@ -286,13 +288,39 @@ static void print_quoted_wide_string(const wide_string_t *const wstr) } } } - fputc('"', out); + fputc(border, out); +} + +/** + * Print a constant character expression. + * + * @param cnst the constant character expression + */ +static void print_character_constant(const const_expression_t *cnst) +{ + print_quoted_string(&cnst->v.character, '\''); +} + +static void print_wide_character_constant(const const_expression_t *cnst) +{ + print_quoted_wide_string(&cnst->v.wide_character, '\''); +} + +/** + * 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, '"'); } static void print_wide_string_literal( const wide_string_literal_expression_t *const wstr) { - print_quoted_wide_string(&wstr->value); + print_quoted_wide_string(&wstr->value, '"'); } static void print_compound_literal( @@ -594,8 +622,7 @@ static void print_select(const select_expression_t *expression) { unsigned prec = get_expression_precedence(expression->base.kind); print_expression_prec(expression->compound, prec); - if(expression->compound->base.type == NULL || - expression->compound->base.type->kind == TYPE_POINTER) { + if(is_type_pointer(expression->compound->base.type)) { fputs("->", out); } else { fputc('.', out); @@ -678,10 +705,13 @@ static void print_expression_prec(const expression_t *expression, unsigned top_p switch(expression->kind) { case EXPR_UNKNOWN: case EXPR_INVALID: - fprintf(out, "*invalid expression*"); + fprintf(out, "$invalid expression$"); + break; + case EXPR_CHARACTER_CONSTANT: + print_character_constant(&expression->conste); break; - case EXPR_CHAR_CONST: - print_char_const(&expression->conste); + case EXPR_WIDE_CHARACTER_CONSTANT: + print_wide_character_constant(&expression->conste); break; case EXPR_CONST: print_const(&expression->conste); @@ -826,9 +856,7 @@ static void print_label_statement(const label_statement_t *statement) { fprintf(stderr, "(%p)", (void*) statement->label); fprintf(out, "%s:\n", statement->label->symbol->string); - if(statement->statement != NULL) { - print_statement(statement->statement); - } + print_statement(statement->statement); } /** @@ -838,12 +866,10 @@ static void print_label_statement(const label_statement_t *statement) */ static void print_if_statement(const if_statement_t *statement) { - fputs("if(", out); + fputs("if (", out); print_expression(statement->condition); fputs(") ", out); - if(statement->true_statement != NULL) { - print_statement(statement->true_statement); - } + print_statement(statement->true_statement); if(statement->false_statement != NULL) { print_indent(); @@ -859,7 +885,7 @@ static void print_if_statement(const if_statement_t *statement) */ static void print_switch_statement(const switch_statement_t *statement) { - fputs("switch(", out); + fputs("switch (", out); print_expression(statement->expression); fputs(") ", out); print_statement(statement->body); @@ -905,6 +931,9 @@ static void print_declaration_statement( declaration_t *declaration = statement->declarations_begin; for( ; declaration != statement->declarations_end->next; declaration = declaration->next) { + if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY) + continue; + if(!first) { print_indent(); } else { @@ -922,7 +951,7 @@ static void print_declaration_statement( */ static void print_while_statement(const while_statement_t *statement) { - fputs("while(", out); + fputs("while (", out); print_expression(statement->condition); fputs(") ", out); print_statement(statement->body); @@ -938,7 +967,7 @@ static void print_do_while_statement(const do_while_statement_t *statement) fputs("do ", out); print_statement(statement->body); print_indent(); - fputs("while(", out); + fputs("while (", out); print_expression(statement->condition); fputs(");\n", out); } @@ -950,7 +979,7 @@ static void print_do_while_statement(const do_while_statement_t *statement) */ static void print_for_statement(const for_statement_t *statement) { - fputs("for(", out); + fputs("for (", out); if(statement->scope.declarations != NULL) { assert(statement->initialisation == NULL); print_declaration(statement->scope.declarations); @@ -1055,6 +1084,9 @@ end_of_print_asm_statement: void print_statement(const statement_t *statement) { switch(statement->kind) { + case STATEMENT_EMPTY: + fputs(";\n", out); + break; case STATEMENT_COMPOUND: print_compound_statement(&statement->compound); break; @@ -1101,7 +1133,7 @@ void print_statement(const statement_t *statement) print_asm_statement(&statement->asms); break; case STATEMENT_INVALID: - fprintf(out, "*invalid statement*"); + fprintf(out, "$invalid statement$"); break; } } @@ -1111,9 +1143,9 @@ void print_statement(const statement_t *statement) * * @param storage_class the storage class */ -static void print_storage_class(unsigned storage_class) +static void print_storage_class(storage_class_tag_t storage_class) { - switch((storage_class_tag_t) storage_class) { + switch(storage_class) { case STORAGE_CLASS_ENUM_ENTRY: case STORAGE_CLASS_NONE: break; @@ -1136,7 +1168,7 @@ static void print_storage_class(unsigned storage_class) void print_initializer(const initializer_t *initializer) { if(initializer == NULL) { - fputs("{ NIL-INITIALIZER }", out); + fputs("{}", out); return; } @@ -1154,8 +1186,9 @@ void print_initializer(const initializer_t *initializer) for(size_t i = 0 ; i < list->len; ++i) { const initializer_t *sub_init = list->initializers[i]; print_initializer(list->initializers[i]); - if(i < list->len-1 && sub_init->kind != INITIALIZER_DESIGNATOR) { - fputs(", ", out); + if(i < list->len-1) { + if(sub_init == NULL || sub_init->kind != INITIALIZER_DESIGNATOR) + fputs(", ", out); } } fputs(" }", out); @@ -1165,7 +1198,7 @@ void print_initializer(const initializer_t *initializer) print_quoted_string(&initializer->string.string, '"'); return; case INITIALIZER_WIDE_STRING: - print_quoted_wide_string(&initializer->wide_string.string); + print_quoted_wide_string(&initializer->wide_string.string, '"'); return; case INITIALIZER_DESIGNATOR: print_designator(initializer->designator.designator); @@ -1176,6 +1209,74 @@ void print_initializer(const initializer_t *initializer) panic("invalid initializer kind found"); } +/** + * Print microsoft extended declaration modifiers. + */ +static void print_ms_modifiers(const declaration_t *declaration) { + decl_modifiers_t modifiers = declaration->modifiers; + + /* DM_FORCEINLINE handled outside. */ + if((modifiers & ~DM_FORCEINLINE) != 0 || declaration->alignment != 0 || + declaration->get_property_sym != NULL || declaration->put_property_sym != NULL) { + char *next = "("; + + fputs("__declspec", out); + if(modifiers & DM_DLLIMPORT) { + fputs(next, out); next = ", "; fputs("dllimport", out); + } + if(modifiers & DM_DLLEXPORT) { + fputs(next, out); next = ", "; fputs("dllexport", out); + } + if(modifiers & DM_THREAD) { + fputs(next, out); next = ", "; fputs("thread", out); + } + if(modifiers & DM_NAKED) { + fputs(next, out); next = ", "; fputs("naked", out); + } + if(modifiers & DM_THREAD) { + fputs(next, out); next = ", "; fputs("thread", out); + } + if(modifiers & DM_SELECTANY) { + fputs(next, out); next = ", "; fputs("selectany", out); + } + if(modifiers & DM_NOTHROW) { + fputs(next, out); next = ", "; fputs("nothrow", out); + } + if(modifiers & DM_NORETURN) { + fputs(next, out); next = ", "; fputs("noreturn", out); + } + if(modifiers & DM_NOINLINE) { + fputs(next, out); next = ", "; fputs("noinline", out); + } + if(modifiers & DM_DEPRECATED) { + fputs(next, out); next = ", "; fputs("deprecated", out); + if(declaration->deprecated_string != NULL) + fprintf(out, "(\"%s\")", declaration->deprecated_string); + } + if(declaration->alignment != 0) { + fputs(next, out); next = ", "; fprintf(out, "align(%u)", declaration->alignment); + } + if(modifiers & DM_RESTRICT) { + fputs(next, out); next = ", "; fputs("restrict", out); + } + if(modifiers & DM_NOALIAS) { + fputs(next, out); next = ", "; fputs("noalias", out); + } + if(declaration->get_property_sym != NULL || declaration->put_property_sym != NULL) { + char *comma = ""; + fputs(next, out); next = ", "; fprintf(out, "property("); + if(declaration->get_property_sym != NULL) { + fprintf(out, "get=%s", declaration->get_property_sym->string); + comma = ", "; + } + if(declaration->put_property_sym != NULL) + fprintf(out, "%sput=%s", comma, declaration->put_property_sym->string); + fputc(')', out); + } + fputs(") ", out); + } +} + /** * Print a declaration in the NORMAL namespace. * @@ -1183,13 +1284,18 @@ void print_initializer(const initializer_t *initializer) */ static void print_normal_declaration(const declaration_t *declaration) { - print_storage_class(declaration->storage_class); + print_storage_class((storage_class_tag_t) declaration->declared_storage_class); if(declaration->is_inline) { - if (declaration->modifiers & DM_FORCEINLINE) + if(declaration->modifiers & DM_FORCEINLINE) fputs("__forceinline ", out); - else - fputs("inline ", out); + else { + if(declaration->modifiers & DM_MICROSOFT_INLINE) + fputs("__inline ", out); + else + fputs("inline ", out); + } } + print_ms_modifiers(declaration); print_type_ext(declaration->type, declaration->symbol, &declaration->scope); @@ -1277,7 +1383,7 @@ void print_ast(const translation_unit_t *unit) } } -static bool is_initializer_const(const initializer_t *initializer) +bool is_constant_initializer(const initializer_t *initializer) { switch(initializer->kind) { case INITIALIZER_STRING: @@ -1288,30 +1394,101 @@ static bool is_initializer_const(const initializer_t *initializer) case INITIALIZER_VALUE: return is_constant_expression(initializer->value.value); - case INITIALIZER_LIST: { + case INITIALIZER_LIST: for(size_t i = 0; i < initializer->list.len; ++i) { initializer_t *sub_initializer = initializer->list.initializers[i]; - if(!is_initializer_const(sub_initializer)) + if(!is_constant_initializer(sub_initializer)) return false; } return true; } - } panic("invalid initializer kind found"); } -/** - * Returns true if a given expression is a compile time - * constant. - * - * @param expression the expression to check - */ +static bool is_object_with_constant_address(const expression_t *expression) +{ + switch(expression->kind) { + case EXPR_UNARY_DEREFERENCE: + return is_address_constant(expression->unary.value); + + case EXPR_SELECT: { + if(is_type_pointer(expression->select.compound->base.type)) { + /* it's a -> */ + return is_address_constant(expression->select.compound); + } else { + return is_object_with_constant_address(expression->select.compound); + } + } + + case EXPR_ARRAY_ACCESS: + return is_constant_expression(expression->array_access.index) + && is_address_constant(expression->array_access.array_ref); + + case EXPR_REFERENCE: { + declaration_t *declaration = expression->reference.declaration; + switch((storage_class_tag_t) declaration->storage_class) { + case STORAGE_CLASS_NONE: + case STORAGE_CLASS_EXTERN: + case STORAGE_CLASS_STATIC: + return true; + default: + return false; + } + } + + default: + return false; + } +} + +bool is_address_constant(const expression_t *expression) +{ + switch(expression->kind) { + case EXPR_UNARY_TAKE_ADDRESS: + return is_object_with_constant_address(expression->unary.value); + + case EXPR_UNARY_CAST: + return is_type_pointer(skip_typeref(expression->base.type)) + && (is_constant_expression(expression->unary.value) + || is_address_constant(expression->unary.value)); + + case EXPR_BINARY_ADD: + case EXPR_BINARY_SUB: { + expression_t *left = expression->binary.left; + expression_t *right = expression->binary.right; + + if(is_type_pointer(skip_typeref(left->base.type))) { + return is_address_constant(left) && is_constant_expression(right); + } else if(is_type_pointer(skip_typeref(right->base.type))) { + return is_constant_expression(left) && is_address_constant(right); + } + + return false; + } + + case EXPR_REFERENCE: { + declaration_t *declaration = expression->reference.declaration; + type_t *type = skip_typeref(declaration->type); + if(is_type_function(type)) + return true; + if(is_type_array(type)) { + return is_object_with_constant_address(expression); + } + return false; + } + + default: + return false; + } +} + bool is_constant_expression(const expression_t *expression) { switch(expression->kind) { case EXPR_CONST: - case EXPR_CHAR_CONST: + case EXPR_CHARACTER_CONSTANT: + case EXPR_WIDE_CHARACTER_CONSTANT: case EXPR_STRING_LITERAL: case EXPR_WIDE_STRING_LITERAL: case EXPR_SIZEOF: @@ -1336,6 +1513,8 @@ bool is_constant_expression(const expression_t *expression) case EXPR_UNARY_PREFIX_DECREMENT: case EXPR_UNARY_BITFIELD_EXTRACT: case EXPR_UNARY_ASSUME: /* has VOID type */ + case EXPR_UNARY_DEREFERENCE: + case EXPR_UNARY_TAKE_ADDRESS: case EXPR_BINARY_ASSIGN: case EXPR_BINARY_MUL_ASSIGN: case EXPR_BINARY_DIV_ASSIGN: @@ -1354,11 +1533,12 @@ bool is_constant_expression(const expression_t *expression) case EXPR_UNARY_PLUS: case EXPR_UNARY_BITWISE_NEGATE: case EXPR_UNARY_NOT: - case EXPR_UNARY_DEREFERENCE: - case EXPR_UNARY_TAKE_ADDRESS: + return is_constant_expression(expression->unary.value); + case EXPR_UNARY_CAST: case EXPR_UNARY_CAST_IMPLICIT: - return is_constant_expression(expression->unary.value); + return is_type_arithmetic(skip_typeref(expression->base.type)) + && is_constant_expression(expression->unary.value); case EXPR_BINARY_ADD: case EXPR_BINARY_SUB: @@ -1389,15 +1569,19 @@ bool is_constant_expression(const expression_t *expression) && is_constant_expression(expression->binary.right); case EXPR_COMPOUND_LITERAL: - return is_initializer_const(expression->compound_literal.initializer); + return is_constant_initializer(expression->compound_literal.initializer); - case EXPR_CONDITIONAL: - /* TODO: not correct, we only have to test expressions which are - * evaluated, which means either the true or false part might be not - * constant */ - return is_constant_expression(expression->conditional.condition) - && is_constant_expression(expression->conditional.true_expression) - && is_constant_expression(expression->conditional.false_expression); + case EXPR_CONDITIONAL: { + expression_t *condition = expression->conditional.condition; + if(!is_constant_expression(condition)) + return false; + + long val = fold_constant(condition); + if(val != 0) + return is_constant_expression(expression->conditional.true_expression); + else + return is_constant_expression(expression->conditional.false_expression); + } case EXPR_ARRAY_ACCESS: return is_constant_expression(expression->array_access.array_ref) @@ -1411,8 +1595,10 @@ bool is_constant_expression(const expression_t *expression) return false; } - case EXPR_UNKNOWN: case EXPR_INVALID: + return true; + + case EXPR_UNKNOWN: break; } panic("invalid expression found (is constant expression)");