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_CHAR_CONST] = PREC_PRIM,
[EXPR_CONST] = PREC_PRIM,
[EXPR_STRING_LITERAL] = PREC_PRIM,
[EXPR_WIDE_STRING_LITERAL] = PREC_PRIM,
panic("wrong expression kind");
}
unsigned res = prec[kind];
- if (res == PREC_BAD) {
+ if (res == PREC_BOTTOM) {
panic("expression kind not defined in get_expression_precedence()");
}
#endif
/**
* 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;
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)
/**
* 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)
{
/**
* 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);
}
/**
- * 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_INVALID:
fprintf(out, "*invalid expression*");
break;
+ case EXPR_CHAR_CONST:
+ print_char_const(&expression->conste);
+ break;
case EXPR_CONST:
print_const(&expression->conste);
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);
}
}
+/**
+ * Print an if statement.
+ *
+ * @param statement the if statement
+ */
static void print_if_statement(const if_statement_t *statement)
{
fputs("if(", out);
}
}
+/**
+ * Print a switch statement.
+ *
+ * @param statement the switch statement
+ */
static void print_switch_statement(const switch_statement_t *statement)
{
fputs("switch(", 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)
{
}
}
+/**
+ * Print a while statement.
+ *
+ * @param statement the statement
+ */
static void print_while_statement(const while_statement_t *statement)
{
fputs("while(", 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);
fputs(");\n", out);
}
+/**
+ * Print a for statement.
+ *
+ * @param statement the statement
+ */
static void print_for_statement(const for_statement_t *statement)
{
fputs("for(", out);
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) {
}
}
+/**
+ * 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) {
}
}
+/**
+ * Print an initializer.
+ *
+ * @param initializer the initializer
+ */
void print_initializer(const initializer_t *initializer)
{
if(initializer->kind == INITIALIZER_VALUE) {
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);
/**
* 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();
}
}
+/**
+ * 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:
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