+/*
+ * 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 <assert.h>
#include <stdio.h>
static FILE *out;
static int indent;
-bool print_implicit_casts = true;
+/** If set, implicit casts are printed. */
+bool print_implicit_casts = false;
+
+/** If set parenthesis are printed to indicate operator precedence. */
+bool print_parenthesis = false;
static void print_statement(const statement_t *statement);
static void print_expression_prec(const expression_t *expression, unsigned prec);
}
enum precedence_t {
- PREC_BAD = 0,
- PREC_COMMA, /* , left to right */
- PREC_ASSIGN, /* = += -= *= /= %= <<= >>= &= ^= |= right to left */
- PREC_COND, /* ?: right to left */
- PREC_LOG_OR, /* || left to right */
- PREC_LOG_AND, /* && left to right */
- PREC_BIT_OR, /* | left to right */
- PREC_BIT_XOR, /* ^ left to right */
- PREC_BIT_AND, /* & left to right */
- PREC_EQ, /* == != left to right */
- PREC_CMP, /* < <= > >= left to right */
- PREC_SHF, /* << >> left to right */
- PREC_PLUS, /* + - left to right */
- PREC_MUL, /* * / % left to right */
- PREC_UNARY, /* ! ~ ++ -- + - (type) * & sizeof right to left */
- PREC_ACCESS, /* () [] -> . left to right */
- PREC_PRIM, /* primary */
+ PREC_BOTTOM = 0,
+ PREC_COMMA = 2, /* , left to right */
+ PREC_ASSIGN = 4, /* = += -= *= /= %= <<= >>= &= ^= |= right to left */
+ PREC_COND = 6, /* ?: right to left */
+ PREC_LOG_OR = 8, /* || left to right */
+ PREC_LOG_AND = 10, /* && left to right */
+ PREC_BIT_OR = 12, /* | left to right */
+ PREC_BIT_XOR = 14, /* ^ left to right */
+ PREC_BIT_AND = 16, /* & left to right */
+ PREC_EQ = 18, /* == != left to right */
+ PREC_CMP = 20, /* < <= > >= left to right */
+ PREC_SHF = 22, /* << >> left to right */
+ PREC_PLUS = 24, /* + - left to right */
+ PREC_MUL = 26, /* * / % left to right */
+ PREC_UNARY = 28, /* ! ~ ++ -- + - (type) * & sizeof right to left */
+ PREC_ACCESS = 30, /* () [] -> . left to right */
+ PREC_PRIM = 32, /* primary */
+ PREC_TOP = 34
};
/**
* 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 ||
}
/**
- * 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)
{
[EXPR_UNKNOWN] = PREC_PRIM,
[EXPR_INVALID] = PREC_PRIM,
[EXPR_REFERENCE] = 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_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_BAD) {
- panic("expression kind not defined in get_expression_precedence()");
- }
-#endif
+
+ assert(res != PREC_BOTTOM);
return res;
}
/**
* 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);
- const char *end = string->begin + string->size;
+ fputc(border, out);
+ const char *end = string->begin + string->size - 1;
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;
break;
}
}
- fputc('"', out);
-}
-
-/**
- * Prints a string literal expression.
- */
-static void print_string_literal(
- const string_literal_expression_t *string_literal)
-{
- print_quoted_string(&string_literal->value);
+ fputc(border, out);
}
/**
* 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)
+static void print_quoted_wide_string(const wide_string_t *const wstr,
+ char border)
{
- fputs("L\"", out);
- for (const wchar_rep_t *c = wstr->value.begin,
- *end = c + wstr->value.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;
}
}
}
- 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, '"');
+}
+
+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.
+ *
+ * @param call the call expression
*/
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)
{
/**
* Prints an unary expression.
+ *
+ * @param unexpr the unary expression
*/
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)
{
/**
* Prints an array expression.
+ *
+ * @param expression the array expression
*/
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)
{
}
/**
- * 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)
{
/**
* Prints a builtin constant expression.
+ *
+ * @param expression the builtin constant expression
*/
static void print_builtin_constant(const builtin_constant_expression_t *expression)
{
/**
* Prints a builtin prefetch expression.
+ *
+ * @param expression the builtin prefetch expression
*/
static void print_builtin_prefetch(const builtin_prefetch_expression_t *expression)
{
/**
* Prints a conditional expression.
+ *
+ * @param expression the conditional expression
*/
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)
{
/**
* Prints a va_arg expression.
+ *
+ * @param expression the va_arg expression
*/
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)
{
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);
/**
* Prints a type classify expression.
+ *
+ * @param expr the type classify expression
*/
static void print_classify_type_expression(
const classify_type_expression_t *const expr)
fputc(')', out);
}
+/**
+ * Prints a designator.
+ *
+ * @param designator the designator
+ */
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_ACCESS);
fputc(']', out);
} else {
fputc('.', out);
}
/**
- * Prints an offsetof classify expression.
+ * Prints an offsetof expression.
+ *
+ * @param expression the offset expression
*/
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)
{
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);
+ if (print_parenthesis && top_prec != PREC_BOTTOM)
+ top_prec = PREC_TOP;
if (top_prec > prec)
fputc('(', out);
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_WIDE_CHARACTER_CONSTANT:
+ print_wide_character_constant(&expression->conste);
break;
case EXPR_CONST:
print_const(&expression->conste);
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;
fputc(')', out);
}
+/**
+ * Print an compound statement.
+ *
+ * @param block the compound statement
+ */
static void print_compound_statement(const compound_statement_t *block)
{
fputs("{\n", out);
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_BAD);
+ 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 ");
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);
fprintf(out, "%s:\n", statement->label->symbol->string);
- if(statement->statement != NULL) {
- print_statement(statement->statement);
- }
+ print_statement(statement->statement);
}
+/**
+ * Print an if statement.
+ *
+ * @param statement the if 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();
}
}
+/**
+ * Print a switch statement.
+ *
+ * @param statement the switch 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);
}
+/**
+ * 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) {
} else {
fputs("case ", out);
print_expression(statement->expression);
+ if (statement->end_range != NULL) {
+ fputs(" ... ", out);
+ print_expression(statement->end_range);
+ }
fputs(":\n", out);
}
++indent;
}
}
+/**
+ * Print a declaration statement.
+ *
+ * @param statement the statement
+ */
static void print_declaration_statement(
const declaration_statement_t *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 {
}
}
+/**
+ * Print a while statement.
+ *
+ * @param statement the 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);
}
+/**
+ * Print a do-while statement.
+ *
+ * @param statement the statement
+ */
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);
}
+/**
+ * Print a for statement.
+ *
+ * @param statement the 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);
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;
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;
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);
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;
fputs(");\n", out);
}
+/**
+ * Print a statement.
+ *
+ * @param statement the 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;
print_asm_statement(&statement->asms);
break;
case STATEMENT_INVALID:
- fprintf(out, "*invalid statement*");
+ fprintf(out, "$invalid statement$");
break;
}
}
-static void print_storage_class(unsigned storage_class)
+/**
+ * Print a storage class.
+ *
+ * @param storage_class the 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;
}
}
+/**
+ * Print an initializer.
+ *
+ * @param initializer the initializer
+ */
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, '"');
+ return;
+ case INITIALIZER_WIDE_STRING:
+ print_quoted_wide_string(&initializer->wide_string.string, '"');
+ 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) {
+ 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);
}
- print_initializer(list->initializers[i]);
+ 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);
}
+/**
+ * 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);
+ 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);
/**
* Prints an expression.
+ *
+ * @param expression the expression
*/
void print_expression(const expression_t *expression) {
- print_expression_prec(expression, PREC_BAD);
+ 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 &&
}
}
+/**
+ * Print the AST of a translation unit.
+ *
+ * @param unit the translation unit
+ */
void print_ast(const translation_unit_t *unit)
{
inc_type_visited();
}
}
+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_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_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);
+ }
+ }
+
+ 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_CHARACTER_CONSTANT:
+ case EXPR_WIDE_CHARACTER_CONSTANT:
case EXPR_STRING_LITERAL:
case EXPR_WIDE_STRING_LITERAL:
case EXPR_SIZEOF:
case EXPR_UNARY_PREFIX_DECREMENT:
case EXPR_UNARY_BITFIELD_EXTRACT:
case EXPR_UNARY_ASSUME: /* has VOID type */
+ case EXPR_UNARY_TAKE_ADDRESS:
+ case EXPR_UNARY_DEREFERENCE:
case EXPR_BINARY_ASSIGN:
case EXPR_BINARY_MUL_ASSIGN:
case EXPR_BINARY_DIV_ASSIGN:
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)");
}
-
+/**
+ * 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);
}
projects / cparser / blobdiff