+/*
+ * This file is part of cparser.
+ * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
+ *
+ * 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 <config.h>
#include "ast_t.h"
+#include "symbol_t.h"
#include "type_t.h"
+#include "parser.h"
+#include "lang_features.h"
#include <assert.h>
#include <stdio.h>
[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,
+ [EXPR_COMPOUND_LITERAL] = PREC_UNARY,
[EXPR_CALL] = PREC_PRIM,
[EXPR_CONDITIONAL] = PREC_COND,
[EXPR_SELECT] = PREC_ACCESS,
[EXPR_CLASSIFY_TYPE] = PREC_UNARY,
[EXPR_ALIGNOF] = PREC_UNARY,
- [EXPR_FUNCTION] = PREC_PRIM,
- [EXPR_PRETTY_FUNCTION] = PREC_PRIM,
+ [EXPR_FUNCNAME] = PREC_PRIM,
[EXPR_BUILTIN_SYMBOL] = PREC_PRIM,
[EXPR_BUILTIN_CONSTANT_P] = PREC_PRIM,
[EXPR_BUILTIN_PREFETCH] = PREC_PRIM,
[EXPR_UNARY_CAST] = PREC_UNARY,
[EXPR_UNARY_CAST_IMPLICIT] = PREC_UNARY,
[EXPR_UNARY_ASSUME] = PREC_PRIM,
- [EXPR_UNARY_BITFIELD_EXTRACT] = PREC_ACCESS,
[EXPR_BINARY_ADD] = PREC_PLUS,
[EXPR_BINARY_SUB] = PREC_PLUS,
[EXPR_BINARY_ISLESSGREATER] = PREC_PRIM,
[EXPR_BINARY_ISUNORDERED] = PREC_PRIM
};
-#ifndef NDEBUG
- if ((unsigned)kind >= (sizeof(prec)/sizeof(prec[0]))) {
- panic("wrong expression kind");
- }
+ assert((unsigned)kind < (sizeof(prec)/sizeof(prec[0])));
unsigned res = prec[kind];
- if (res == PREC_BOTTOM) {
- panic("expression kind not defined in get_expression_precedence()");
- }
-#endif
+
+ assert(res != PREC_BOTTOM);
return res;
}
*
* @param string the string constant
* @param border the border char
+ * @param skip number of chars to skip at the end
*/
-static void print_quoted_string(const string_t *const string, char border)
+static void print_quoted_string(const string_t *const string, char border, int skip)
{
fputc(border, out);
- const char *end = string->begin + string->size;
+ const char *end = string->begin + string->size - skip;
for (const char *c = string->begin; c != end; ++c) {
if (*c == border) {
fputc('\\', out);
case '\t': fputs("\\t", out); break;
case '\v': fputs("\\v", out); break;
case '\?': fputs("\\?", out); break;
+ case 27:
+ if (c_mode & _GNUC) {
+ fputs("\\e", out); break;
+ }
+ /*fallthrough*/
default:
if(!isprint(*c)) {
fprintf(out, "\\%03o", *c);
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
+ * @param wstr the wide string literal expression
+ * @param border the border char
+ * @param skip number of chars to skip at the end
*/
-static void print_wide_string_literal(
- const wide_string_literal_expression_t *const wstr)
+static void print_quoted_wide_string(const wide_string_t *const wstr,
+ char border, int skip)
{
- fputs("L\"", out);
- for (const wchar_rep_t *c = wstr->value.begin,
- *end = c + wstr->value.size;
- c != end; ++c) {
+ fputc('L', out);
+ fputc(border, out);
+ const wchar_rep_t *end = wstr->begin + wstr->size - skip;
+ for (const wchar_rep_t *c = wstr->begin; c != end; ++c) {
switch (*c) {
case L'\"': fputs("\\\"", out); break;
case L'\\': fputs("\\\\", out); break;
case L'\t': fputs("\\t", out); break;
case L'\v': fputs("\\v", out); break;
case L'\?': fputs("\\?", out); break;
+ case 27:
+ if (c_mode & _GNUC) {
+ fputs("\\e", out); break;
+ }
+ /*fallthrough*/
default: {
const unsigned tc = *c;
if (tc < 0x80U) {
}
}
}
+ 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, '\'', 0);
+}
+
+static void print_wide_character_constant(const const_expression_t *cnst)
+{
+ print_quoted_wide_string(&cnst->v.wide_character, '\'', 0);
+}
+
+/**
+ * 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, '"', 1);
+}
+
+/**
+ * Prints a predefined symbol.
+ */
+static void print_funcname(
+ const funcname_expression_t *funcname)
+{
+ const char *s = "";
+ switch(funcname->kind) {
+ case FUNCNAME_FUNCTION: s = (c_mode & _C99) ? "__func__" : "__FUNCTION__"; break;
+ case FUNCNAME_PRETTY_FUNCTION: s = "__PRETTY_FUNCTION__"; break;
+ case FUNCNAME_FUNCSIG: s = "__FUNCSIG__"; break;
+ case FUNCNAME_FUNCDNAME: s = "__FUNCDNAME__"; break;
+ }
+ fputc('"', out);
+ fputs(s, out);
fputc('"', out);
}
+static void print_wide_string_literal(
+ const wide_string_literal_expression_t *const wstr)
+{
+ print_quoted_wide_string(&wstr->value, '"', 1);
+}
+
+static void print_compound_literal(
+ const compound_literal_expression_t *expression)
+{
+ fputc('(', out);
+ print_type(expression->type);
+ fputs(") ", out);
+ print_initializer(expression->initializer);
+}
+
/**
* Prints a call expression.
*
case EXPR_UNARY_DEREFERENCE: fputs("*", out); break;
case EXPR_UNARY_TAKE_ADDRESS: fputs("&", out); break;
- case EXPR_UNARY_BITFIELD_EXTRACT:
- print_expression_prec(unexpr->value, prec);
- return;
-
case EXPR_UNARY_POSTFIX_INCREMENT:
print_expression_prec(unexpr->value, prec);
fputs("++", out);
fputs("--", out);
return;
case EXPR_UNARY_CAST_IMPLICIT:
- if(!print_implicit_casts) {
- print_expression_prec(unexpr->value, prec);
- return;
- }
- /* fallthrough */
case EXPR_UNARY_CAST:
fputc('(', out);
print_type(unexpr->base.type);
if(!expression->flipped) {
print_expression_prec(expression->array_ref, prec);
fputc('[', out);
- print_expression_prec(expression->index, prec);
+ print_expression_prec(expression->index, PREC_BOTTOM);
fputc(']', out);
} else {
print_expression_prec(expression->index, prec);
fputc('[', out);
- print_expression_prec(expression->array_ref, prec);
+ print_expression_prec(expression->array_ref, PREC_BOTTOM);
fputc(']', out);
}
}
fputs("(", out);
print_expression_prec(expression->condition, prec);
fputs(" ? ", out);
- print_expression_prec(expression->true_expression, prec);
- fputs(" : ", out);
+ if (expression->true_expression != NULL) {
+ print_expression_prec(expression->true_expression, prec);
+ fputs(" : ", out);
+ } else {
+ fputs(": ", out);
+ }
print_expression_prec(expression->false_expression, prec);
fputs(")", out);
}
{
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(skip_typeref(expression->compound->base.type))) {
fputs("->", out);
} else {
fputc('.', out);
*/
static void print_designator(const designator_t *designator)
{
- fputs(designator->symbol->string, out);
- for (designator = designator->next; designator != NULL; designator = designator->next) {
- if (designator->array_access) {
+ for ( ; designator != NULL; designator = designator->next) {
+ if (designator->symbol == NULL) {
fputc('[', out);
- print_expression_prec(designator->array_access, PREC_ACCESS);
+ print_expression_prec(designator->array_index, PREC_BOTTOM);
fputc(']', out);
} else {
fputc('.', out);
*/
static void print_expression_prec(const expression_t *expression, unsigned top_prec)
{
+ if (expression->kind == EXPR_UNARY_CAST_IMPLICIT && !print_implicit_casts) {
+ expression = expression->unary.value;
+ }
unsigned prec = get_expression_precedence(expression->base.kind);
if (print_parenthesis && top_prec != PREC_BOTTOM)
top_prec = PREC_TOP;
switch(expression->kind) {
case EXPR_UNKNOWN:
case EXPR_INVALID:
- fprintf(out, "*invalid expression*");
+ fprintf(out, "$invalid expression$");
break;
- case EXPR_CHAR_CONST:
- print_char_const(&expression->conste);
+ case EXPR_CHARACTER_CONSTANT:
+ print_character_constant(&expression->conste);
+ break;
+ case EXPR_WIDE_CHARACTER_CONSTANT:
+ print_wide_character_constant(&expression->conste);
break;
case EXPR_CONST:
print_const(&expression->conste);
break;
- case EXPR_FUNCTION:
- case EXPR_PRETTY_FUNCTION:
+ case EXPR_FUNCNAME:
+ print_funcname(&expression->funcname);
+ break;
case EXPR_STRING_LITERAL:
print_string_literal(&expression->string);
break;
case EXPR_WIDE_STRING_LITERAL:
print_wide_string_literal(&expression->wide_string);
break;
+ case EXPR_COMPOUND_LITERAL:
+ print_compound_literal(&expression->compound_literal);
+ break;
case EXPR_CALL:
print_call_expression(&expression->call);
break;
{
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);
}
/**
*/
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();
*/
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);
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 {
*/
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);
fputs("do ", out);
print_statement(statement->body);
print_indent();
- fputs("while(", out);
+ fputs("while (", out);
print_expression(statement->condition);
fputs(");\n", out);
}
*/
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);
}
/**
- * Print assembler constraints.
+ * Print assembler arguments.
*
- * @param constraints the constraints
+ * @param arguments the arguments
*/
-static void print_asm_constraints(asm_constraint_t *constraints)
+static void print_asm_arguments(asm_argument_t *arguments)
{
- asm_constraint_t *constraint = constraints;
- for( ; constraint != NULL; constraint = constraint->next) {
- if(constraint != constraints)
+ asm_argument_t *argument = arguments;
+ for( ; argument != NULL; argument = argument->next) {
+ if(argument != arguments)
fputs(", ", out);
- if(constraint->symbol) {
- fprintf(out, "[%s] ", constraint->symbol->string);
+ if(argument->symbol) {
+ fprintf(out, "[%s] ", argument->symbol->string);
}
- print_quoted_string(&constraint->constraints, '"');
+ print_quoted_string(&argument->constraints, '"', 1);
fputs(" (", out);
- print_expression(constraint->expression);
+ print_expression(argument->expression);
fputs(")", out);
}
}
if(clobber != clobbers)
fputs(", ", out);
- print_quoted_string(&clobber->clobber, '"');
+ print_quoted_string(&clobber->clobber, '"', 1);
}
}
fputs("volatile ", out);
}
fputs("(", out);
- print_quoted_string(&statement->asm_text, '"');
+ print_quoted_string(&statement->asm_text, '"', 1);
if(statement->inputs == NULL && statement->outputs == NULL
&& statement->clobbers == NULL)
goto end_of_print_asm_statement;
fputs(" : ", out);
- print_asm_constraints(statement->inputs);
+ print_asm_arguments(statement->inputs);
if(statement->outputs == NULL && statement->clobbers == NULL)
goto end_of_print_asm_statement;
fputs(" : ", out);
- print_asm_constraints(statement->outputs);
+ print_asm_arguments(statement->outputs);
if(statement->clobbers == NULL)
goto end_of_print_asm_statement;
fputs(");\n", out);
}
+/**
+ * Print a microsoft __try statement.
+ *
+ * @param statement the statement
+ */
+static void print_ms_try_statement(const ms_try_statement_t *statement)
+{
+ fputs("__try ", out);
+ print_statement(statement->try_statement);
+ print_indent();
+ if(statement->except_expression != NULL) {
+ fputs("__except(", out);
+ print_expression(statement->except_expression);
+ fputs(") ", out);
+ } else {
+ fputs("__finally ", out);
+ }
+ print_statement(statement->final_statement);
+}
+
+/**
+ * Print a microsoft __leave statement.
+ *
+ * @param statement the statement
+ */
+static void print_leave_statement(const leave_statement_t *statement)
+{
+ (void) statement;
+ fputs("__leave;\n", out);
+}
+
/**
* Print a 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;
case STATEMENT_ASM:
print_asm_statement(&statement->asms);
break;
+ case STATEMENT_MS_TRY:
+ print_ms_try_statement(&statement->ms_try);
+ break;
+ case STATEMENT_LEAVE:
+ print_leave_statement(&statement->leave);
+ break;
case STATEMENT_INVALID:
- fprintf(out, "*invalid statement*");
+ fprintf(out, "$invalid statement$");
break;
}
}
*
* @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;
*/
void print_initializer(const initializer_t *initializer)
{
- if(initializer->kind == INITIALIZER_VALUE) {
+ if(initializer == NULL) {
+ fputs("{}", out);
+ return;
+ }
+
+ switch(initializer->kind) {
+ case INITIALIZER_VALUE: {
const initializer_value_t *value = &initializer->value;
print_expression(value->value);
return;
}
+ case INITIALIZER_LIST: {
+ assert(initializer->kind == INITIALIZER_LIST);
+ fputs("{ ", out);
+ const initializer_list_t *list = &initializer->list;
+
+ 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) {
+ if(sub_init == NULL || sub_init->kind != INITIALIZER_DESIGNATOR)
+ fputs(", ", out);
+ }
+ }
+ fputs(" }", out);
+ return;
+ }
+ case INITIALIZER_STRING:
+ print_quoted_string(&initializer->string.string, '"', 1);
+ return;
+ case INITIALIZER_WIDE_STRING:
+ print_quoted_wide_string(&initializer->wide_string.string, '"', 1);
+ return;
+ case INITIALIZER_DESIGNATOR:
+ print_designator(initializer->designator.designator);
+ fputs(" = ", out);
+ return;
+ }
- assert(initializer->kind == INITIALIZER_LIST);
- fputs("{ ", out);
- const initializer_list_t *list = &initializer->list;
+ panic("invalid initializer kind found");
+}
- for(size_t i = 0 ; i < list->len; ++i) {
- if(i > 0) {
- fputs(", ", out);
+/**
+ * Print microsoft extended declaration modifiers.
+ */
+static void print_ms_modifiers(const declaration_t *declaration) {
+ if((c_mode & _MS) == 0)
+ return;
+
+ 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);
}
- print_initializer(list->initializers[i]);
+ 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);
}
- fputs("}", out);
}
/**
*/
static void print_normal_declaration(const declaration_t *declaration)
{
- print_storage_class(declaration->storage_class);
- if(declaration->is_inline) {
- if (declaration->modifiers & DM_FORCEINLINE)
+ print_storage_class((storage_class_tag_t) declaration->declared_storage_class);
+ if (declaration->is_inline) {
+ if (declaration->modifiers & DM_FORCEINLINE) {
fputs("__forceinline ", out);
- else
+ } 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);
}
}
-/**
- * Returns true if a given expression is a compile time
- * constant.
- *
- * @param expression the expression to check
- */
+bool is_constant_initializer(const initializer_t *initializer)
+{
+ switch(initializer->kind) {
+ case INITIALIZER_STRING:
+ case INITIALIZER_WIDE_STRING:
+ case INITIALIZER_DESIGNATOR:
+ return true;
+
+ case INITIALIZER_VALUE:
+ return is_constant_expression(initializer->value.value);
+
+ case INITIALIZER_LIST:
+ for(size_t i = 0; i < initializer->list.len; ++i) {
+ initializer_t *sub_initializer = initializer->list.initializers[i];
+ if(!is_constant_initializer(sub_initializer))
+ return false;
+ }
+ return true;
+ }
+ panic("invalid initializer kind found");
+}
+
+static bool is_object_with_linker_constant_address(const expression_t *expression)
+{
+ switch(expression->kind) {
+ case EXPR_UNARY_DEREFERENCE:
+ return is_address_constant(expression->unary.value);
+
+ case EXPR_SELECT: {
+ type_t *base_type = skip_typeref(expression->select.compound->base.type);
+ if(is_type_pointer(base_type)) {
+ /* it's a -> */
+ return is_address_constant(expression->select.compound);
+ } else {
+ return is_object_with_linker_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_linker_constant_address(expression->unary.value);
+
+ case EXPR_UNARY_DEREFERENCE: {
+ type_t *real_type
+ = revert_automatic_type_conversion(expression->unary.value);
+ /* dereferencing a function is a NOP */
+ if(is_type_function(real_type)) {
+ return is_address_constant(expression->unary.value);
+ }
+
+ /* fallthrough */
+ }
+
+ case EXPR_UNARY_CAST: {
+ type_t *dest = skip_typeref(expression->base.type);
+ if (!is_type_pointer(dest) &&
+ ! (dest->kind == TYPE_ATOMIC
+ && (get_atomic_type_flags(dest->atomic.akind) & ATOMIC_TYPE_FLAG_INTEGER)
+ && (get_atomic_type_size(dest->atomic.akind) >= get_atomic_type_size(get_intptr_kind()))))
+ return false;
+
+ return (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_linker_constant_address(expression);
+ }
+ return false;
+ }
+
+ default:
+ return false;
+ }
+}
+
+static bool is_builtin_const_call(const expression_t *expression)
+{
+ expression_t *function = expression->call.function;
+ if (function->kind != EXPR_BUILTIN_SYMBOL) {
+ return false;
+ }
+
+ symbol_t *symbol = function->builtin_symbol.symbol;
+
+ switch (symbol->ID) {
+ case T___builtin_huge_val:
+ case T___builtin_nan:
+ case T___builtin_nanf:
+ case T___builtin_nand:
+ return true;
+ }
+
+ return false;
+}
+
+static bool is_constant_pointer(const expression_t *expression)
+{
+ if (is_constant_expression(expression))
+ return true;
+
+ switch (expression->kind) {
+ case EXPR_SELECT:
+ return is_constant_pointer(expression->select.compound);
+ case EXPR_UNARY_CAST:
+ return is_constant_pointer(expression->unary.value);
+ default:
+ return false;
+ }
+}
+
+static bool is_object_with_constant_address(const expression_t *expression)
+{
+ switch(expression->kind) {
+ case EXPR_SELECT: {
+ expression_t *compound = expression->select.compound;
+ type_t *compound_type = compound->base.type;
+ compound_type = skip_typeref(compound_type);
+ if(is_type_pointer(compound_type)) {
+ return is_constant_pointer(compound);
+ } else {
+ return is_object_with_constant_address(compound);
+ }
+ }
+ case EXPR_ARRAY_ACCESS:
+ return is_constant_pointer(expression->array_access.array_ref)
+ && is_constant_expression(expression->array_access.index);
+ case EXPR_UNARY_DEREFERENCE:
+ return is_constant_pointer(expression->unary.value);
+ 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:
case EXPR_CLASSIFY_TYPE:
- case EXPR_FUNCTION:
- case EXPR_PRETTY_FUNCTION:
+ case EXPR_FUNCNAME:
case EXPR_OFFSETOF:
case EXPR_ALIGNOF:
case EXPR_BUILTIN_CONSTANT_P:
return true;
+ case EXPR_SIZEOF: {
+ type_t *type = expression->typeprop.type;
+ if (type == NULL)
+ type = expression->typeprop.tp_expression->base.type;
+
+ type = skip_typeref(type);
+ if (is_type_array(type) && type->array.is_vla)
+ return false;
+ return true;
+ }
+
case EXPR_BUILTIN_SYMBOL:
case EXPR_BUILTIN_PREFETCH:
- case EXPR_CALL:
case EXPR_SELECT:
case EXPR_VA_START:
case EXPR_VA_ARG:
case EXPR_UNARY_POSTFIX_DECREMENT:
case EXPR_UNARY_PREFIX_INCREMENT:
case EXPR_UNARY_PREFIX_DECREMENT:
- case EXPR_UNARY_BITFIELD_EXTRACT:
case EXPR_UNARY_ASSUME: /* has VOID type */
+ case EXPR_UNARY_DEREFERENCE:
case EXPR_BINARY_ASSIGN:
case EXPR_BINARY_MUL_ASSIGN:
case EXPR_BINARY_DIV_ASSIGN:
case EXPR_BINARY_COMMA:
return false;
+ case EXPR_UNARY_TAKE_ADDRESS:
+ return is_object_with_constant_address(expression->unary.value);
+
+ case EXPR_CALL:
+ return is_builtin_const_call(expression);
+
case EXPR_UNARY_NEGATE:
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:
return is_constant_expression(expression->binary.left)
&& is_constant_expression(expression->binary.right);
- 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_COMPOUND_LITERAL:
+ return is_constant_initializer(expression->compound_literal.initializer);
+
+ 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)
return false;
}
- case EXPR_UNKNOWN:
case EXPR_INVALID:
+ return true;
+
+ case EXPR_UNKNOWN:
break;
}
panic("invalid expression found (is constant expression)");
projects / cparser / blobdiff