#define MAX_LOOKAHEAD 2
//#define STRICT_C99
-struct environment_entry_t {
- symbol_t *symbol;
+typedef struct {
declaration_t *old_declaration;
- const void *old_context;
-};
+ symbol_t *symbol;
+ unsigned short namespace;
+} stack_entry_t;
static token_t token;
static token_t lookahead_buffer[MAX_LOOKAHEAD];
static int lookahead_bufpos;
-static struct obstack environment_obstack;
-static environment_entry_t **environment_stack = NULL;
+static stack_entry_t *environment_stack = NULL;
static context_t *global_context = NULL;
static context_t *context = NULL;
static declaration_t *last_declaration = NULL;
#define eat(token_type) do { assert(token.type == token_type); next_token(); } while(0)
-void error(void)
+static void error(void)
{
#ifdef ABORT_ON_ERROR
abort();
#endif
}
-void parser_print_prefix_pos(const source_position_t source_position)
+static void parser_print_prefix_pos(const source_position_t source_position)
{
fputs(source_position.input_name, stderr);
fputc(':', stderr);
fputs(": ", stderr);
}
-void parser_print_error_prefix_pos(const source_position_t source_position)
+static void parser_print_error_prefix_pos(
+ const source_position_t source_position)
{
parser_print_prefix_pos(source_position);
fputs("error: ", stderr);
error();
}
-void parser_print_error_prefix(void)
+static void parser_print_error_prefix(void)
{
parser_print_prefix_pos(token.source_position);
error();
{
context = new_context;
- declaration_t *declaration = new_context->declarations;
- if(declaration != NULL) {
- while(true) {
- if(declaration->next == NULL)
- break;
- declaration = declaration->next;
+ last_declaration = new_context->declarations;
+ if(last_declaration != NULL) {
+ while(last_declaration->next != NULL) {
+ last_declaration = last_declaration->next;
}
}
-
- last_declaration = declaration;
}
/**
return declaration->type == previous->type;
}
+static declaration_t *get_declaration(symbol_t *symbol, namespace_t namespace)
+{
+ declaration_t *declaration = symbol->declaration;
+ for( ; declaration != NULL; declaration = declaration->symbol_next) {
+ if(declaration->namespace == namespace)
+ return declaration;
+ }
+
+ return NULL;
+}
+
+static const char *get_namespace_prefix(namespace_t namespace)
+{
+ switch(namespace) {
+ case NAMESPACE_NORMAL:
+ return "";
+ case NAMESPACE_UNION:
+ return "union ";
+ case NAMESPACE_STRUCT:
+ return "struct ";
+ case NAMESPACE_ENUM:
+ return "enum ";
+ }
+ panic("invalid namespace found");
+}
+
/**
* pushs an environment_entry on the environment stack and links the
* corresponding symbol to the new entry
*/
-static inline declaration_t *environment_push(declaration_t *declaration,
- const void *context)
+static declaration_t *environment_push(declaration_t *declaration)
{
- symbol_t *symbol = declaration->symbol;
- assert(declaration != symbol->declaration);
+ symbol_t *symbol = declaration->symbol;
+ namespace_t namespace = declaration->namespace;
assert(declaration->source_position.input_name != NULL);
- if(symbol->context == context) {
- declaration_t *previous_declaration = symbol->declaration;
- if(symbol->declaration != NULL) {
- if(!is_compatible_declaration(declaration, previous_declaration)) {
- parser_print_error_prefix_pos(declaration->source_position);
- fprintf(stderr, "definition of symbol '%s' with type ",
- declaration->symbol->string);
- error();
- print_type(declaration->type);
- fputc('\n', stderr);
- parser_print_error_prefix_pos(
- previous_declaration->source_position);
- fprintf(stderr, "is incompatible with previous declaration "
- "of type ");
- print_type(previous_declaration->type);
- fputc('\n', stderr);
- }
- return previous_declaration;
+ /* a declaration should be only pushed once */
+ assert(declaration->parent_context == NULL);
+ declaration->parent_context = context;
+
+ declaration_t *previous_declaration = get_declaration(symbol, namespace);
+ assert(declaration != previous_declaration);
+ if(previous_declaration != NULL
+ && previous_declaration->parent_context == context) {
+ if(!is_compatible_declaration(declaration, previous_declaration)) {
+ parser_print_error_prefix_pos(declaration->source_position);
+ fprintf(stderr, "definition of symbol %s%s with type ",
+ get_namespace_prefix(namespace), symbol->string);
+ error();
+ print_type(declaration->type);
+ fputc('\n', stderr);
+ parser_print_error_prefix_pos(
+ previous_declaration->source_position);
+ fprintf(stderr, "is incompatible with previous declaration "
+ "of type ");
+ print_type(previous_declaration->type);
+ fputc('\n', stderr);
}
+ return previous_declaration;
}
- environment_entry_t *entry
- = obstack_alloc(&environment_obstack, sizeof(entry[0]));
- memset(entry, 0, sizeof(entry[0]));
-
- int top = ARR_LEN(environment_stack);
- ARR_RESIZE(environment_stack, top + 1);
- environment_stack[top] = entry;
+ /* remember old declaration */
+ stack_entry_t entry;
+ entry.symbol = symbol;
+ entry.old_declaration = symbol->declaration;
+ entry.namespace = namespace;
+ ARR_APP1(environment_stack, entry);
- entry->old_declaration = symbol->declaration;
- entry->old_context = symbol->context;
- entry->symbol = symbol;
- symbol->declaration = declaration;
- symbol->context = context;
+ /* replace/add declaration into declaration list of the symbol */
+ if(symbol->declaration == NULL) {
+ symbol->declaration = declaration;
+ } else {
+ declaration_t *iter = symbol->declaration;
+ for( ; iter != NULL; iter = iter->symbol_next) {
+ declaration_t *symbol_next = iter->symbol_next;
+ if(symbol_next == NULL) {
+ iter->symbol_next = declaration;
+ assert(declaration->symbol_next == NULL);
+ break;
+ }
+ if(symbol_next->namespace == namespace) {
+ iter->symbol_next = declaration;
+ declaration->symbol_next = symbol_next->symbol_next;
+ break;
+ }
+ }
+ }
return declaration;
}
/**
* pops symbols from the environment stack until @p new_top is the top element
*/
-static inline void environment_pop_to(size_t new_top)
+static void environment_pop_to(size_t new_top)
{
- environment_entry_t *entry = NULL;
size_t top = ARR_LEN(environment_stack);
size_t i;
+ assert(new_top <= top);
if(new_top == top)
return;
- assert(new_top < top);
- i = top;
- do {
- entry = environment_stack[i - 1];
-
- symbol_t *symbol = entry->symbol;
+ for(i = top; i > new_top; --i) {
+ stack_entry_t *entry = & environment_stack[i - 1];
- symbol->declaration = entry->old_declaration;
- symbol->context = entry->old_context;
+ declaration_t *old_declaration = entry->old_declaration;
+ symbol_t *symbol = entry->symbol;
+ namespace_t namespace = entry->namespace;
- --i;
- } while(i != new_top);
- obstack_free(&environment_obstack, entry);
+ /* replace/remove declaration */
+ declaration_t *declaration = symbol->declaration;
+ assert(declaration != NULL);
+ if(declaration->namespace == namespace) {
+ if(old_declaration == NULL) {
+ symbol->declaration = declaration->symbol_next;
+ } else {
+ symbol->declaration = old_declaration;
+ assert(old_declaration->symbol_next ==
+ declaration->symbol_next);
+ }
+ } else {
+ for(; declaration != NULL; declaration = declaration->symbol_next) {
+ declaration_t *symbol_next = declaration->symbol_next;
+ if(symbol_next->namespace == namespace) {
+ declaration->symbol_next = old_declaration;
+ assert(old_declaration->symbol_next
+ == symbol_next->symbol_next);
+ break;
+ }
+ }
+ assert(declaration != NULL);
+ }
+ }
ARR_SHRINKLEN(environment_stack, (int) new_top);
}
}
static void parse_compound_type_entries(void);
-static void parse_declarator(declaration_t *declaration,
- storage_class_t storage_class, type_t *type,
- int may_be_abstract);
+static declaration_t *parse_declarator(storage_class_t storage_class,
+ type_t *type, int may_be_abstract);
static declaration_t *record_declaration(declaration_t *declaration);
typedef struct declaration_specifiers_t declaration_specifiers_t;
return result;
}
-static compound_type_t *find_compound_type(compound_type_t *types,
- const symbol_t *symbol)
-{
- compound_type_t *type = types;
- for( ; type != NULL; type = type->next) {
- if(type->symbol == symbol)
- return type;
- }
-
- return NULL;
-}
-
-static type_t *parse_compound_type_specifier(bool is_struct)
+static declaration_t *parse_compound_type_specifier(bool is_struct)
{
if(is_struct) {
eat(T_struct);
eat(T_union);
}
- symbol_t *symbol = NULL;
- compound_type_t *compound_type = NULL;
+ symbol_t *symbol = NULL;
+ declaration_t *declaration = NULL;
if(token.type == T_IDENTIFIER) {
symbol = token.v.symbol;
next_token();
- if(context != NULL) {
- if(is_struct) {
- compound_type = find_compound_type(context->structs, symbol);
- } else {
- compound_type = find_compound_type(context->unions, symbol);
- }
+ if(is_struct) {
+ declaration = get_declaration(symbol, NAMESPACE_STRUCT);
+ } else {
+ declaration = get_declaration(symbol, NAMESPACE_UNION);
}
} else if(token.type != '{') {
if(is_struct) {
return NULL;
}
- if(compound_type == NULL) {
- compound_type = allocate_type_zero(sizeof(compound_type[0]));
+ if(declaration == NULL) {
+ declaration = allocate_type_zero(sizeof(declaration[0]));
if(is_struct) {
- compound_type->type.type = TYPE_COMPOUND_STRUCT;
+ declaration->namespace = NAMESPACE_STRUCT;
} else {
- compound_type->type.type = TYPE_COMPOUND_UNION;
+ declaration->namespace = NAMESPACE_UNION;
}
- compound_type->source_position = token.source_position;
- compound_type->symbol = symbol;
+ declaration->source_position = token.source_position;
+ declaration->symbol = symbol;
}
if(token.type == '{') {
- if(compound_type->defined) {
+ if(declaration->init.is_defined) {
+ assert(symbol != NULL);
parser_print_error_prefix();
fprintf(stderr, "multiple definition of %s %s\n",
is_struct ? "struct" : "union", symbol->string);
- compound_type->context.declarations = NULL;
+ declaration->context.declarations = NULL;
}
- compound_type->defined = 1;
+ record_declaration(declaration);
+ declaration->init.is_defined = true;
int top = environment_top();
context_t *last_context = context;
- set_context(&compound_type->context);
+ set_context(& declaration->context);
parse_compound_type_entries();
parse_attributes();
- assert(context == &compound_type->context);
+ assert(context == & declaration->context);
set_context(last_context);
environment_pop_to(top);
}
- return (type_t*) compound_type;
+ return declaration;
}
static void parse_enum_entries(void)
if(token.type == '=') {
next_token();
- entry->initializer = parse_initializer();
+ entry->init.initializer = parse_initializer();
}
record_declaration(entry);
expect_void('}');
}
-static enum_type_t *find_enum_type(enum_type_t *types, const symbol_t *symbol)
-{
- enum_type_t *type = types;
- for( ; type != NULL; type = type->next) {
- if(type->symbol == symbol)
- return type;
- }
-
- return NULL;
-}
-
-static type_t *parse_enum_specifier(void)
+static declaration_t *parse_enum_specifier(void)
{
eat(T_enum);
- symbol_t *symbol = NULL;
- enum_type_t *enum_type = NULL;
+ declaration_t *declaration;
+ symbol_t *symbol;
if(token.type == T_IDENTIFIER) {
symbol = token.v.symbol;
next_token();
- if(context != NULL) {
- enum_type = find_enum_type(context->enums, symbol);
- }
+ declaration = get_declaration(symbol, NAMESPACE_ENUM);
} else if(token.type != '{') {
parse_error_expected("problem while parsing enum type specifier",
T_IDENTIFIER, '{', 0);
return NULL;
+ } else {
+ declaration = NULL;
+ symbol = NULL;
}
- if(enum_type == NULL) {
- enum_type = allocate_type_zero(sizeof(enum_type[0]));
- enum_type->type.type = TYPE_ENUM;
- enum_type->source_position = token.source_position;
- enum_type->symbol = symbol;
+ if(declaration == NULL) {
+ declaration = allocate_type_zero(sizeof(declaration[0]));
+
+ declaration->namespace = NAMESPACE_ENUM;
+ declaration->source_position = token.source_position;
+ declaration->symbol = symbol;
}
if(token.type == '{') {
- if(enum_type->defined) {
+ if(declaration->init.is_defined) {
parser_print_error_prefix();
fprintf(stderr, "multiple definitions of enum %s\n",
symbol->string);
- enum_type->entries_begin = NULL;
- enum_type->entries_end = NULL;
}
- enum_type->defined = 1;
-
- declaration_t *before = last_declaration;
+ record_declaration(declaration);
+ declaration->init.is_defined = 1;
parse_enum_entries();
parse_attributes();
-
- if(before == NULL) {
- enum_type->entries_begin = context->declarations;
- } else {
- enum_type->entries_begin = before->next;
- }
- enum_type->entries_end = last_declaration;
}
- return (type_t*) enum_type;
+ return declaration;
+}
+
+/**
+ * if a symbol is a typedef to another type, return true
+ */
+static bool is_typedef_symbol(symbol_t *symbol)
+{
+ declaration_t *declaration = get_declaration(symbol, NAMESPACE_NORMAL);
+ if(declaration == NULL
+ || declaration->storage_class != STORAGE_CLASS_TYPEDEF)
+ return false;
+
+ return true;
}
static type_t *parse_typeof(void)
{
eat(T___typeof__);
- type_t *result;
+ type_t *type;
expect('(');
- declaration_t *declaration;
- expression_t *expression;
+ expression_t *expression = NULL;
restart:
switch(token.type) {
goto restart;
case T_IDENTIFIER:
- declaration = token.v.symbol->declaration;
- if(declaration != NULL
- && declaration->storage_class == STORAGE_CLASS_TYPEDEF) {
- result = parse_typename();
- break;
+ if(is_typedef_symbol(token.v.symbol)) {
+ type = parse_typename();
+ } else {
+ expression = parse_expression();
+ type = expression->datatype;
}
- expression = parse_expression();
- result = expression->datatype;
break;
TYPENAME_START
- result = parse_typename();
+ type = parse_typename();
break;
default:
expression = parse_expression();
- result = expression->datatype;
+ type = expression->datatype;
break;
}
expect(')');
- return result;
+ typeof_type_t *typeof = allocate_type_zero(sizeof(typeof[0]));
+ typeof->type.type = TYPE_TYPEOF;
+ typeof->expression = expression;
+ typeof->typeof_type = type;
+
+ return (type_t*) typeof;
}
typedef enum {
type->type.type = TYPE_BUILTIN;
type->symbol = symbol;
- type_t *result = typehash_insert((type_t*) type);
- if(result != (type_t*) type) {
- free_type(type);
- }
+ return (type_t*) type;
+}
- return result;
+static type_t *get_typedef_type(symbol_t *symbol)
+{
+ declaration_t *declaration = get_declaration(symbol, NAMESPACE_NORMAL);
+ if(declaration == NULL
+ || declaration->storage_class != STORAGE_CLASS_TYPEDEF)
+ return NULL;
+
+ typedef_type_t *typedef_type = allocate_type_zero(sizeof(typedef_type[0]));
+ typedef_type->type.type = TYPE_TYPEDEF;
+ typedef_type->declaration = declaration;
+
+ return (type_t*) typedef_type;
}
static void parse_declaration_specifiers(declaration_specifiers_t *specifiers)
{
- declaration_t *declaration;
type_t *type = NULL;
unsigned type_qualifiers = 0;
unsigned type_specifiers = 0;
}
break;
- /* TODO: if type != NULL for the following rules issue an error */
- case T_struct:
- type = parse_compound_type_specifier(true);
+ /* TODO: if type != NULL for the following rules should issue
+ * an error */
+ case T_struct: {
+ compound_type_t *compound_type
+ = allocate_type_zero(sizeof(compound_type[0]));
+ compound_type->type.type = TYPE_COMPOUND_STRUCT;
+ compound_type->declaration = parse_compound_type_specifier(true);
+
+ type = (type_t*) compound_type;
break;
- case T_union:
- type = parse_compound_type_specifier(false);
+ }
+ case T_union: {
+ compound_type_t *compound_type
+ = allocate_type_zero(sizeof(compound_type[0]));
+ compound_type->type.type = TYPE_COMPOUND_UNION;
+ compound_type->declaration = parse_compound_type_specifier(false);
+
+ type = (type_t*) compound_type;
break;
- case T_enum:
- type = parse_enum_specifier();
+ }
+ case T_enum: {
+ enum_type_t *enum_type = allocate_type_zero(sizeof(enum_type[0]));
+ enum_type->type.type = TYPE_ENUM;
+ enum_type->declaration = parse_enum_specifier();
+
+ type = (type_t*) enum_type;
break;
+ }
case T___typeof__:
type = parse_typeof();
break;
parse_attributes();
break;
- case T_IDENTIFIER:
- declaration = token.v.symbol->declaration;
- if(declaration == NULL ||
- declaration->storage_class != STORAGE_CLASS_TYPEDEF) {
+ case T_IDENTIFIER: {
+ type_t *typedef_type = get_typedef_type(token.v.symbol);
+
+ if(typedef_type == NULL)
goto finish_specifiers;
- }
- type = declaration->type;
- assert(type != NULL);
next_token();
+ type = typedef_type;
break;
+ }
/* function specifier */
default:
parse_declaration_specifiers(&specifiers);
- declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
- parse_declarator(declaration, specifiers.storage_class,
- specifiers.type, 1);
+ declaration_t *declaration = parse_declarator(specifiers.storage_class,
+ specifiers.type, 1);
+
+ /* TODO check declaration constraints for parameters */
+ if(declaration->storage_class == STORAGE_CLASS_TYPEDEF) {
+ parse_error("typedef not allowed in parameter list");
+ }
return declaration;
}
-static declaration_t *parse_parameters(method_type_t *type)
+static declaration_t *parse_parameters(function_type_t *type)
{
if(token.type == T_IDENTIFIER) {
- symbol_t *symbol = token.v.symbol;
- declaration_t *declaration = symbol->declaration;
- if(declaration == NULL
- || declaration->storage_class != STORAGE_CLASS_TYPEDEF) {
+ symbol_t *symbol = token.v.symbol;
+ if(!is_typedef_symbol(symbol)) {
/* TODO */
parse_identifier_list();
return NULL;
return NULL;
}
- declaration_t *declarations = NULL;
- declaration_t *declaration;
- declaration_t *last_declaration = NULL;
- method_parameter_t *parameter;
- method_parameter_t *last_parameter = NULL;
+ declaration_t *declarations = NULL;
+ declaration_t *declaration;
+ declaration_t *last_declaration = NULL;
+ function_parameter_t *parameter;
+ function_parameter_t *last_parameter = NULL;
while(true) {
switch(token.type) {
typedef enum {
CONSTRUCT_POINTER,
- CONSTRUCT_METHOD,
+ CONSTRUCT_FUNCTION,
CONSTRUCT_ARRAY
} construct_type_type_t;
type_qualifier_t type_qualifiers;
};
-typedef struct construct_method_type_t construct_method_type_t;
-struct construct_method_type_t {
- construct_type_t construct_type;
- method_type_t *method_type;
+typedef struct construct_function_type_t construct_function_type_t;
+struct construct_function_type_t {
+ construct_type_t construct_type;
+ function_type_t *function_type;
};
typedef struct parsed_array_t parsed_array_t;
return (construct_type_t*) array;
}
-static construct_type_t *parse_method_declarator(declaration_t *declaration)
+static construct_type_t *parse_function_declarator(declaration_t *declaration)
{
eat('(');
- method_type_t *method_type
- = allocate_type_zero(sizeof(method_type[0]));
- method_type->type.type = TYPE_METHOD;
+ function_type_t *type = allocate_type_zero(sizeof(type[0]));
+ type->type.type = TYPE_FUNCTION;
- declaration_t *parameters = parse_parameters(method_type);
+ declaration_t *parameters = parse_parameters(type);
if(declaration != NULL) {
declaration->context.declarations = parameters;
}
- construct_method_type_t *construct_method_type =
- obstack_alloc(&temp_obst, sizeof(construct_method_type[0]));
- memset(construct_method_type, 0, sizeof(construct_method_type[0]));
- construct_method_type->construct_type.type = CONSTRUCT_METHOD;
- construct_method_type->method_type = method_type;
+ construct_function_type_t *construct_function_type =
+ obstack_alloc(&temp_obst, sizeof(construct_function_type[0]));
+ memset(construct_function_type, 0, sizeof(construct_function_type[0]));
+ construct_function_type->construct_type.type = CONSTRUCT_FUNCTION;
+ construct_function_type->function_type = type;
expect(')');
- return (construct_type_t*) construct_method_type;
+ return (construct_type_t*) construct_function_type;
}
static construct_type_t *parse_inner_declarator(declaration_t *declaration,
construct_type_t *type;
switch(token.type) {
case '(':
- type = parse_method_declarator(declaration);
+ type = parse_function_declarator(declaration);
break;
case '[':
type = parse_array_declarator();
{
construct_type_t *iter = construct_list;
for( ; iter != NULL; iter = iter->next) {
- parsed_pointer_t *parsed_pointer;
- parsed_array_t *parsed_array;
- construct_method_type_t *construct_method_type;
- method_type_t *method_type;
- pointer_type_t *pointer_type;
- array_type_t *array_type;
+ parsed_pointer_t *parsed_pointer;
+ parsed_array_t *parsed_array;
+ construct_function_type_t *construct_function_type;
+ function_type_t *function_type;
+ pointer_type_t *pointer_type;
+ array_type_t *array_type;
switch(iter->type) {
- case CONSTRUCT_METHOD:
- construct_method_type = (construct_method_type_t*) iter;
- method_type = construct_method_type->method_type;
+ case CONSTRUCT_FUNCTION:
+ construct_function_type = (construct_function_type_t*) iter;
+ function_type = construct_function_type->function_type;
- method_type->result_type = type;
- type = (type_t*) method_type;
+ function_type->result_type = type;
+ type = (type_t*) function_type;
break;
case CONSTRUCT_POINTER:
return type;
}
-static void parse_declarator(declaration_t *declaration,
- storage_class_t storage_class, type_t *type,
- int may_be_abstract)
+static declaration_t *parse_declarator(storage_class_t storage_class,
+ type_t *type, int may_be_abstract)
{
+ declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
+ declaration->storage_class = storage_class;
+
construct_type_t *construct_type
= parse_inner_declarator(declaration, may_be_abstract);
+ declaration->type = construct_declarator_type(construct_type, type);
- declaration->type = construct_declarator_type(construct_type, type);
- declaration->storage_class = storage_class;
if(construct_type != NULL) {
obstack_free(&temp_obst, construct_type);
}
+
+ return declaration;
}
static type_t *parse_abstract_declarator(type_t *base_type)
{
- construct_type_t *construct_type
- = parse_inner_declarator(NULL, 1);
-
- if(construct_type == NULL)
- return NULL;
+ construct_type_t *construct_type = parse_inner_declarator(NULL, 1);
type_t *result = construct_declarator_type(construct_type, base_type);
- obstack_free(&temp_obst, construct_type);
+ if(construct_type != NULL) {
+ obstack_free(&temp_obst, construct_type);
+ }
return result;
}
static declaration_t *record_declaration(declaration_t *declaration)
{
- if(context == NULL)
- return declaration;
+ assert(context != NULL);
symbol_t *symbol = declaration->symbol;
if(symbol != NULL) {
- declaration_t *alias = environment_push(declaration, context);
+ declaration_t *alias = environment_push(declaration);
if(alias != declaration)
return alias;
+ } else {
+ declaration->parent_context = context;
}
if(last_declaration != NULL) {
last_declaration->next = declaration;
} else {
- context->declarations = declaration;
+ context->declarations = declaration;
}
last_declaration = declaration;
{
while(true) {
declaration_t *ndeclaration
- = allocate_ast_zero(sizeof(ndeclaration[0]));
+ = parse_declarator(specifiers->storage_class, specifiers->type, 0);
- parse_declarator(ndeclaration, specifiers->storage_class,
- specifiers->type, 0);
declaration_t *declaration = record_declaration(ndeclaration);
if(token.type == '=') {
next_token();
- /* TODO: check that this is an allowed type (esp. no method type) */
+ /* TODO: check that this is an allowed type (no function type) */
- if(declaration->initializer != NULL) {
+ if(declaration->init.initializer != NULL) {
parser_error_multiple_definition(declaration, ndeclaration);
}
- ndeclaration->initializer = parse_initializer();
+ ndeclaration->init.initializer = parse_initializer();
} else if(token.type == '{') {
- if(declaration->type->type != TYPE_METHOD) {
+ if(declaration->type->type != TYPE_FUNCTION) {
parser_print_error_prefix();
fprintf(stderr, "Declarator ");
print_type_ext(declaration->type, declaration->symbol, NULL);
- fprintf(stderr, " is not a method type.\n");
+ fprintf(stderr, " has a body but is not a function type.\n");
+ eat_block();
+ continue;
}
- if(declaration->initializer != NULL) {
+ if(declaration->init.statement != NULL) {
parser_error_multiple_definition(declaration, ndeclaration);
}
if(ndeclaration != declaration) {
/* push function parameters */
declaration_t *parameter = declaration->context.declarations;
for( ; parameter != NULL; parameter = parameter->next) {
- environment_push(parameter, context);
+ environment_push(parameter);
}
statement_t *statement = parse_compound_statement();
set_context(last_context);
environment_pop_to(top);
- declaration->statement = statement;
+ declaration->init.statement = statement;
return;
}
/* TODO (bitfields) */
} else {
declaration_t *declaration
- = allocate_ast_zero(sizeof(declaration[0]));
- parse_declarator(declaration, specifiers->storage_class,
- specifiers->type, 1);
+ = parse_declarator(specifiers->storage_class,
+ specifiers->type, 1);
+ /* TODO: check constraints for struct declarations */
/* TODO: check for doubled fields */
record_declaration(declaration);
while(token.type != '}' && token.type != T_EOF) {
declaration_specifiers_t specifiers;
memset(&specifiers, 0, sizeof(specifiers));
- /* TODO not correct as this allows storage class stuff... but only
- * specifiers and qualifiers sould be allowed here */
parse_declaration_specifiers(&specifiers);
parse_struct_declarators(&specifiers);
static void parse_declaration(void)
{
+ source_position_t source_position = token.source_position;
+
declaration_specifiers_t specifiers;
memset(&specifiers, 0, sizeof(specifiers));
parse_declaration_specifiers(&specifiers);
if(token.type == ';') {
next_token();
+
+ declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
+
+ declaration->type = specifiers.type;
+ declaration->storage_class = specifiers.storage_class;
+ declaration->source_position = source_position;
+ record_declaration(declaration);
return;
}
parse_init_declarators(&specifiers);
static declaration_t *create_implicit_function(symbol_t *symbol,
const source_position_t source_position)
{
- method_type_t *method_type = allocate_type_zero(sizeof(method_type));
+ function_type_t *function_type = allocate_type_zero(sizeof(function_type));
- method_type->type.type = TYPE_METHOD;
- method_type->result_type = type_int;
- method_type->unspecified_parameters = true;
+ function_type->type.type = TYPE_FUNCTION;
+ function_type->result_type = type_int;
+ function_type->unspecified_parameters = true;
- type_t *type = typehash_insert((type_t*) method_type);
- if(type != (type_t*) method_type) {
- free_type(method_type);
+ type_t *type = typehash_insert((type_t*) function_type);
+ if(type != (type_t*) function_type) {
+ free_type(function_type);
}
declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
declaration->symbol = symbol;
declaration->source_position = source_position;
- /* we have to violate the environment push/pop rules here and assign
- * the declaration directly to its symbol and append it to the
- * global context */
+ /* prepend the implicit definition to the global context
+ * this is safe since the symbol wasn't declared as anything else yet
+ */
assert(symbol->declaration == NULL);
- symbol->declaration = declaration;
- declaration->next = global_context->declarations;
- global_context->declarations = declaration;
+
+ context_t *last_context = context;
+ context = global_context;
+
+ environment_push(declaration);
+ declaration->next = context->declarations;
+ context->declarations = declaration;
+
+ context = last_context;
return declaration;
}
ref->expression.type = EXPR_REFERENCE;
ref->symbol = token.v.symbol;
- declaration_t *declaration = ref->symbol->declaration;
- source_position_t source_position = token.source_position;
+ declaration_t *declaration = get_declaration(ref->symbol, NAMESPACE_NORMAL);
+
+ source_position_t source_position = token.source_position;
next_token();
if(declaration == NULL) {
{
eat('(');
- declaration_t *declaration;
switch(token.type) {
case '{':
/* gcc extension: a stement expression */
TYPE_SPECIFIERS
return parse_cast();
case T_IDENTIFIER:
- declaration = token.v.symbol->declaration;
- if(declaration != NULL &&
- (declaration->storage_class == STORAGE_CLASS_TYPEDEF)) {
+ if(is_typedef_symbol(token.v.symbol)) {
return parse_cast();
}
}
static bool is_declaration_specifier(const token_t *token,
bool only_type_specifiers)
{
- declaration_t *declaration;
-
switch(token->type) {
TYPE_SPECIFIERS
return 1;
case T_IDENTIFIER:
- declaration = token->v.symbol->declaration;
- if(declaration == NULL)
- return 0;
- if(declaration->storage_class != STORAGE_CLASS_TYPEDEF)
- return 0;
- return 1;
+ return is_typedef_symbol(token->v.symbol);
STORAGE_CLASSES
TYPE_QUALIFIERS
if(only_type_specifiers)
call_expression_t *call = allocate_ast_zero(sizeof(call[0]));
call->expression.type = EXPR_CALL;
- call->method = expression;
+ call->function = expression;
/* parse arguments */
eat('(');
type = pointer->points_to;
}
- if(type == NULL || type->type != TYPE_METHOD) {
+ if(type == NULL || type->type != TYPE_FUNCTION) {
parser_print_error_prefix();
- fprintf(stderr, "expected a method type for call but found type ");
+ fprintf(stderr, "expected a function type for call but found "
+ "type ");
print_type(expression->datatype);
fprintf(stderr, "\n");
} else {
- method_type_t *method_type = (method_type_t*) type;
- call->expression.datatype = method_type->result_type;
+ function_type_t *function_type = (function_type_t*) type;
+ call->expression.datatype = function_type->result_type;
}
}
}
static void type_error(const char *msg, const source_position_t source_position,
- const type_t *type)
+ type_t *type)
{
parser_print_error_prefix_pos(source_position);
fprintf(stderr, "%s, but found type ", msg);
}
static void type_error_incompatible(const char *msg,
- const source_position_t source_position, const type_t *type1,
- const type_t *type2)
+ const source_position_t source_position, type_t *type1, type_t *type2)
{
parser_print_error_prefix_pos(source_position);
fprintf(stderr, "%s, incompatible types: ", msg);
return parse_sub_expression(precedence);
}
-#define CREATE_UNARY_EXPRESSION_PARSER(token_type, unexpression_type) \
-static \
-expression_t *parse_##unexpression_type(unsigned precedence) \
-{ \
- eat(token_type); \
- \
- unary_expression_t *unary_expression \
- = allocate_ast_zero(sizeof(unary_expression[0])); \
- unary_expression->expression.type = EXPR_UNARY; \
- unary_expression->type = unexpression_type; \
- unary_expression->value = parse_sub_expression(precedence); \
- \
- return (expression_t*) unary_expression; \
-}
-
-CREATE_UNARY_EXPRESSION_PARSER('-', UNEXPR_NEGATE)
-CREATE_UNARY_EXPRESSION_PARSER('+', UNEXPR_PLUS)
-CREATE_UNARY_EXPRESSION_PARSER('!', UNEXPR_NOT)
-CREATE_UNARY_EXPRESSION_PARSER('*', UNEXPR_DEREFERENCE)
-CREATE_UNARY_EXPRESSION_PARSER('&', UNEXPR_TAKE_ADDRESS)
-CREATE_UNARY_EXPRESSION_PARSER('~', UNEXPR_BITWISE_NEGATE)
-CREATE_UNARY_EXPRESSION_PARSER(T_PLUSPLUS, UNEXPR_PREFIX_INCREMENT)
-CREATE_UNARY_EXPRESSION_PARSER(T_MINUSMINUS, UNEXPR_PREFIX_DECREMENT)
-
-#define CREATE_UNARY_POSTFIX_EXPRESSION_PARSER(token_type, unexpression_type) \
-static \
-expression_t *parse_##unexpression_type(unsigned precedence, \
- expression_t *left) \
+static type_t *get_unexpr_arithmetic_type(const expression_t *expression)
+{
+ /* TODO */
+ return expression->datatype;
+}
+
+static type_t *get_unexpr_dereference_type(const expression_t *expression)
+{
+ (void) expression;
+ /* TODO... */
+ return NULL;
+}
+
+static type_t *get_unexpr_take_addr_type(const expression_t *expression)
+{
+ type_t *type = expression->datatype;
+ return make_pointer_type(type, 0);
+}
+
+#define CREATE_UNARY_EXPRESSION_PARSER(token_type, unexpression_type, tfunc) \
+static expression_t *parse_##unexpression_type(unsigned precedence) \
+{ \
+ eat(token_type); \
+ \
+ unary_expression_t *unary_expression \
+ = allocate_ast_zero(sizeof(unary_expression[0])); \
+ unary_expression->expression.type = EXPR_UNARY; \
+ unary_expression->type = unexpression_type; \
+ unary_expression->value = parse_sub_expression(precedence); \
+ unary_expression->expression.datatype = tfunc(unary_expression->value); \
+ \
+ return (expression_t*) unary_expression; \
+}
+
+CREATE_UNARY_EXPRESSION_PARSER('-', UNEXPR_NEGATE, get_unexpr_arithmetic_type)
+CREATE_UNARY_EXPRESSION_PARSER('+', UNEXPR_PLUS, get_unexpr_arithmetic_type)
+CREATE_UNARY_EXPRESSION_PARSER('!', UNEXPR_NOT, get_unexpr_arithmetic_type)
+CREATE_UNARY_EXPRESSION_PARSER('*', UNEXPR_DEREFERENCE,
+ get_unexpr_dereference_type)
+CREATE_UNARY_EXPRESSION_PARSER('&', UNEXPR_TAKE_ADDRESS,
+ get_unexpr_take_addr_type)
+CREATE_UNARY_EXPRESSION_PARSER('~', UNEXPR_BITWISE_NEGATE,
+ get_unexpr_arithmetic_type)
+CREATE_UNARY_EXPRESSION_PARSER(T_PLUSPLUS, UNEXPR_PREFIX_INCREMENT,
+ get_unexpr_arithmetic_type)
+CREATE_UNARY_EXPRESSION_PARSER(T_MINUSMINUS, UNEXPR_PREFIX_DECREMENT,
+ get_unexpr_arithmetic_type)
+
+#define CREATE_UNARY_POSTFIX_EXPRESSION_PARSER(token_type, unexpression_type, \
+ tfunc) \
+static expression_t *parse_##unexpression_type(unsigned precedence, \
+ expression_t *left) \
{ \
(void) precedence; \
eat(token_type); \
\
unary_expression_t *unary_expression \
= allocate_ast_zero(sizeof(unary_expression[0])); \
- unary_expression->expression.type = EXPR_UNARY; \
- unary_expression->type = unexpression_type; \
- unary_expression->value = left; \
+ unary_expression->expression.type = EXPR_UNARY; \
+ unary_expression->type = unexpression_type; \
+ unary_expression->value = left; \
+ unary_expression->expression.datatype = tfunc(left); \
\
return (expression_t*) unary_expression; \
}
-CREATE_UNARY_POSTFIX_EXPRESSION_PARSER(T_PLUSPLUS, UNEXPR_POSTFIX_INCREMENT)
-CREATE_UNARY_POSTFIX_EXPRESSION_PARSER(T_MINUSMINUS, UNEXPR_POSTFIX_DECREMENT)
-
-#define CREATE_BINEXPR_PARSER(token_type, binexpression_type) \
-static \
-expression_t *parse_##binexpression_type(unsigned precedence, \
- expression_t *left) \
-{ \
- eat(token_type); \
- \
- expression_t *right = parse_sub_expression(precedence); \
- \
- binary_expression_t *binexpr \
- = allocate_ast_zero(sizeof(binexpr[0])); \
- binexpr->expression.type = EXPR_BINARY; \
- binexpr->type = binexpression_type; \
- binexpr->left = left; \
- binexpr->right = right; \
- \
- return (expression_t*) binexpr; \
-}
-
-CREATE_BINEXPR_PARSER(',', BINEXPR_COMMA)
-CREATE_BINEXPR_PARSER('*', BINEXPR_MUL)
-CREATE_BINEXPR_PARSER('/', BINEXPR_DIV)
-CREATE_BINEXPR_PARSER('%', BINEXPR_MOD)
-CREATE_BINEXPR_PARSER('+', BINEXPR_ADD)
-CREATE_BINEXPR_PARSER('-', BINEXPR_SUB)
-CREATE_BINEXPR_PARSER('<', BINEXPR_LESS)
-CREATE_BINEXPR_PARSER('>', BINEXPR_GREATER)
-CREATE_BINEXPR_PARSER('=', BINEXPR_ASSIGN)
-CREATE_BINEXPR_PARSER(T_EQUALEQUAL, BINEXPR_EQUAL)
-CREATE_BINEXPR_PARSER(T_EXCLAMATIONMARKEQUAL, BINEXPR_NOTEQUAL)
-CREATE_BINEXPR_PARSER(T_LESSEQUAL, BINEXPR_LESSEQUAL)
-CREATE_BINEXPR_PARSER(T_GREATEREQUAL, BINEXPR_GREATEREQUAL)
-CREATE_BINEXPR_PARSER('&', BINEXPR_BITWISE_AND)
-CREATE_BINEXPR_PARSER('|', BINEXPR_BITWISE_OR)
-CREATE_BINEXPR_PARSER('^', BINEXPR_BITWISE_XOR)
-CREATE_BINEXPR_PARSER(T_ANDAND, BINEXPR_LOGICAL_AND)
-CREATE_BINEXPR_PARSER(T_PIPEPIPE, BINEXPR_LOGICAL_OR)
-CREATE_BINEXPR_PARSER(T_LESSLESS, BINEXPR_SHIFTLEFT)
-CREATE_BINEXPR_PARSER(T_GREATERGREATER, BINEXPR_SHIFTRIGHT)
-CREATE_BINEXPR_PARSER(T_PLUSEQUAL, BINEXPR_ADD_ASSIGN)
-CREATE_BINEXPR_PARSER(T_MINUSEQUAL, BINEXPR_SUB_ASSIGN)
-CREATE_BINEXPR_PARSER(T_ASTERISKEQUAL, BINEXPR_MUL_ASSIGN)
-CREATE_BINEXPR_PARSER(T_SLASHEQUAL, BINEXPR_DIV_ASSIGN)
-CREATE_BINEXPR_PARSER(T_PERCENTEQUAL, BINEXPR_MOD_ASSIGN)
-CREATE_BINEXPR_PARSER(T_LESSLESSEQUAL, BINEXPR_SHIFTLEFT_ASSIGN)
-CREATE_BINEXPR_PARSER(T_GREATERGREATEREQUAL, BINEXPR_SHIFTRIGHT_ASSIGN)
-CREATE_BINEXPR_PARSER(T_ANDEQUAL, BINEXPR_BITWISE_AND_ASSIGN)
-CREATE_BINEXPR_PARSER(T_PIPEEQUAL, BINEXPR_BITWISE_OR_ASSIGN)
-CREATE_BINEXPR_PARSER(T_CARETEQUAL, BINEXPR_BITWISE_XOR_ASSIGN)
+CREATE_UNARY_POSTFIX_EXPRESSION_PARSER(T_PLUSPLUS, UNEXPR_POSTFIX_INCREMENT,
+ get_unexpr_arithmetic_type)
+CREATE_UNARY_POSTFIX_EXPRESSION_PARSER(T_MINUSMINUS, UNEXPR_POSTFIX_DECREMENT,
+ get_unexpr_arithmetic_type)
+
+static type_t *get_binexpr_int_type(const expression_t *left,
+ const expression_t *right)
+{
+ (void) left;
+ (void) right;
+ return type_int;
+}
+
+static type_t *get_binexpr_arithmetic_type(const expression_t *left,
+ const expression_t *right)
+{
+ (void) right;
+ return left->datatype;
+}
+
+static type_t *get_binexpr_arithmetic_assign_type(const expression_t *left,
+ const expression_t *right)
+{
+ (void) right;
+ /* TODO */
+ return left->datatype;
+}
+
+static type_t *get_binexpr_right_type(const expression_t *left,
+ const expression_t *right)
+{
+ (void) left;
+ return right->datatype;
+}
+
+#define CREATE_BINEXPR_PARSER(token_type, binexpression_type, tfunc) \
+static expression_t *parse_##binexpression_type(unsigned precedence, \
+ expression_t *left) \
+{ \
+ eat(token_type); \
+ \
+ expression_t *right = parse_sub_expression(precedence); \
+ \
+ binary_expression_t *binexpr \
+ = allocate_ast_zero(sizeof(binexpr[0])); \
+ binexpr->expression.type = EXPR_BINARY; \
+ binexpr->type = binexpression_type; \
+ binexpr->left = left; \
+ binexpr->right = right; \
+ binexpr->expression.datatype = tfunc(left, right); \
+ \
+ return (expression_t*) binexpr; \
+}
+
+CREATE_BINEXPR_PARSER(',', BINEXPR_COMMA, get_binexpr_right_type)
+CREATE_BINEXPR_PARSER('*', BINEXPR_MUL, get_binexpr_arithmetic_type)
+CREATE_BINEXPR_PARSER('/', BINEXPR_DIV, get_binexpr_arithmetic_type)
+CREATE_BINEXPR_PARSER('%', BINEXPR_MOD, get_binexpr_arithmetic_type)
+CREATE_BINEXPR_PARSER('+', BINEXPR_ADD, get_binexpr_arithmetic_type)
+CREATE_BINEXPR_PARSER('-', BINEXPR_SUB, get_binexpr_arithmetic_type)
+CREATE_BINEXPR_PARSER('<', BINEXPR_LESS, get_binexpr_int_type)
+CREATE_BINEXPR_PARSER('>', BINEXPR_GREATER, get_binexpr_int_type)
+CREATE_BINEXPR_PARSER('=', BINEXPR_ASSIGN, get_binexpr_right_type)
+CREATE_BINEXPR_PARSER(T_EQUALEQUAL, BINEXPR_EQUAL,
+ get_binexpr_int_type)
+CREATE_BINEXPR_PARSER(T_EXCLAMATIONMARKEQUAL, BINEXPR_NOTEQUAL,
+ get_binexpr_int_type)
+CREATE_BINEXPR_PARSER(T_LESSEQUAL, BINEXPR_LESSEQUAL,
+ get_binexpr_int_type)
+CREATE_BINEXPR_PARSER(T_GREATEREQUAL, BINEXPR_GREATEREQUAL,
+ get_binexpr_int_type)
+CREATE_BINEXPR_PARSER('&', BINEXPR_BITWISE_AND, get_binexpr_arithmetic_type)
+CREATE_BINEXPR_PARSER('|', BINEXPR_BITWISE_OR, get_binexpr_arithmetic_type)
+CREATE_BINEXPR_PARSER('^', BINEXPR_BITWISE_XOR, get_binexpr_arithmetic_type)
+CREATE_BINEXPR_PARSER(T_ANDAND, BINEXPR_LOGICAL_AND,
+ get_binexpr_int_type)
+CREATE_BINEXPR_PARSER(T_PIPEPIPE, BINEXPR_LOGICAL_OR,
+ get_binexpr_int_type)
+CREATE_BINEXPR_PARSER(T_LESSLESS, BINEXPR_SHIFTLEFT,
+ get_binexpr_arithmetic_type)
+CREATE_BINEXPR_PARSER(T_GREATERGREATER, BINEXPR_SHIFTRIGHT,
+ get_binexpr_arithmetic_type)
+CREATE_BINEXPR_PARSER(T_PLUSEQUAL, BINEXPR_ADD_ASSIGN,
+ get_binexpr_arithmetic_assign_type)
+CREATE_BINEXPR_PARSER(T_MINUSEQUAL, BINEXPR_SUB_ASSIGN,
+ get_binexpr_arithmetic_assign_type)
+CREATE_BINEXPR_PARSER(T_ASTERISKEQUAL, BINEXPR_MUL_ASSIGN,
+ get_binexpr_arithmetic_assign_type)
+CREATE_BINEXPR_PARSER(T_SLASHEQUAL, BINEXPR_DIV_ASSIGN,
+ get_binexpr_arithmetic_assign_type)
+CREATE_BINEXPR_PARSER(T_PERCENTEQUAL, BINEXPR_MOD_ASSIGN,
+ get_binexpr_arithmetic_assign_type)
+CREATE_BINEXPR_PARSER(T_LESSLESSEQUAL, BINEXPR_SHIFTLEFT_ASSIGN,
+ get_binexpr_arithmetic_assign_type)
+CREATE_BINEXPR_PARSER(T_GREATERGREATEREQUAL, BINEXPR_SHIFTRIGHT_ASSIGN,
+ get_binexpr_arithmetic_assign_type)
+CREATE_BINEXPR_PARSER(T_ANDEQUAL, BINEXPR_BITWISE_AND_ASSIGN,
+ get_binexpr_arithmetic_assign_type)
+CREATE_BINEXPR_PARSER(T_PIPEEQUAL, BINEXPR_BITWISE_OR_ASSIGN,
+ get_binexpr_arithmetic_assign_type)
+CREATE_BINEXPR_PARSER(T_CARETEQUAL, BINEXPR_BITWISE_XOR_ASSIGN,
+ get_binexpr_arithmetic_assign_type)
static expression_t *parse_sub_expression(unsigned precedence)
{
-void register_expression_parser(parse_expression_function parser,
- int token_type, unsigned precedence)
+static void register_expression_parser(parse_expression_function parser,
+ int token_type, unsigned precedence)
{
expression_parser_function_t *entry = &expression_parsers[token_type];
entry->precedence = precedence;
}
-void register_expression_infix_parser(parse_expression_infix_function parser,
- int token_type, unsigned precedence)
+static void register_expression_infix_parser(
+ parse_expression_infix_function parser, int token_type,
+ unsigned precedence)
{
expression_parser_function_t *entry = &expression_parsers[token_type];
static statement_t *parse_statement(void)
{
- declaration_t *declaration;
statement_t *statement = NULL;
/* declaration or statement */
break;
}
- declaration = token.v.symbol->declaration;
- if(declaration != NULL &&
- declaration->storage_class == STORAGE_CLASS_TYPEDEF) {
+ if(is_typedef_symbol(token.v.symbol)) {
statement = parse_declaration_statement();
break;
}
translation_unit_t *parse(void)
{
- obstack_init(&environment_obstack);
- environment_stack = NEW_ARR_F(environment_entry_t*, 0);
+ environment_stack = NEW_ARR_F(stack_entry_t, 0);
type_set_output(stderr);
translation_unit_t *unit = parse_translation_unit();
DEL_ARR_F(environment_stack);
- obstack_free(&environment_obstack, NULL);
return unit;
}
projects / cparser / blobdiff