#include "adt/error.h"
#include "adt/array.h"
-#define PRINT_TOKENS
+//#define PRINT_TOKENS
#define MAX_LOOKAHEAD 2
struct environment_entry_t {
static int lookahead_bufpos;
static struct obstack environment_obstack;
static environment_entry_t **environment_stack = NULL;
-static translation_unit_t *translation_unit = NULL;
-static block_statement_t *context = NULL;
+static context_t *context = NULL;
+static declaration_t *last_declaration = NULL;
static
statement_t *parse_compound_statement(void);
} \
next_token();
+static void set_context(context_t *new_context)
+{
+ context = new_context;
+
+ declaration_t *declaration = new_context->declarations;
+ if(declaration != NULL) {
+ while(1) {
+ if(declaration->next == NULL)
+ break;
+ declaration = declaration->next;
+ }
+ }
+
+ last_declaration = declaration;
+}
/**
* pushs an environment_entry on the environment stack and links the
ARR_RESIZE(environment_stack, top + 1);
environment_stack[top] = entry;
+ assert(declaration->source_position.input_name != NULL);
+
symbol_t *symbol = declaration->symbol;
assert(declaration != symbol->declaration);
if(symbol->context == context) {
- if(context != NULL) {
+ if(symbol->declaration != NULL) {
assert(symbol->declaration != NULL);
parser_print_error_prefix_pos(declaration->source_position);
fprintf(stderr, "multiple definitions for symbol '%s'.\n",
return parse_expression();
}
-static compound_entry_t *parse_compound_type_entries(void);
+static void parse_compound_type_entries(void);
static void parse_declarator(declaration_t *declaration,
- storage_class_t storage_class, type_t *type);
+ storage_class_t storage_class, type_t *type,
+ int may_omit_identifier);
+static void maybe_push_declaration(declaration_t *declaration);
+static void record_declaration(declaration_t *declaration);
typedef struct declaration_specifiers_t declaration_specifiers_t;
struct declaration_specifiers_t {
struct_type->type.type = TYPE_COMPOUND_STRUCT;
struct_type->source_position = token.source_position;
+ int top = environment_top();
+ context_t *last_context = context;
+ set_context(&struct_type->context);
+
if(token.type == T_IDENTIFIER) {
- /* TODO */
next_token();
if(token.type == '{') {
parse_compound_type_entries();
} else {
parse_error_expected("problem while parsing struct type specifiers",
T_IDENTIFIER, '{', 0);
- return NULL;
+ struct_type = NULL;
}
+ assert(context == &struct_type->context);
+ set_context(last_context);
+ environment_pop_to(top);
+
return (type_t*) struct_type;
}
union_type->type.type = TYPE_COMPOUND_UNION;
union_type->source_position = token.source_position;
+ int top = environment_top();
+ context_t *last_context = context;
+ set_context(&union_type->context);
+
if(token.type == T_IDENTIFIER) {
union_type->symbol = token.v.symbol;
next_token();
} else {
parse_error_expected("problem while parsing union type specifiers",
T_IDENTIFIER, '{');
+ union_type = NULL;
}
+ assert(context == &union_type->context);
+ set_context(last_context);
+ environment_pop_to(top);
+
return (type_t*) union_type;
}
case T_enum: \
COMPLEX_SPECIFIERS \
IMAGINARY_SPECIFIERS
-/* TODO: T_IDENTIFIER && typename */
#define DECLARATION_START \
STORAGE_CLASSES \
type_t *type = NULL;
unsigned type_qualifiers = 0;
unsigned type_specifiers = 0;
+ int newtype = 0;
while(1) {
switch(token.type) {
atomic_type_t *atype = allocate_type_zero(sizeof(atype[0]));
atype->type.type = TYPE_ATOMIC;
atype->atype = atomic_type;
+ newtype = 1;
type = (type_t*) atype;
} else {
type->qualifiers = type_qualifiers;
type_t *result = typehash_insert(type);
- if(result != (type_t*) type) {
+ if(newtype && result != (type_t*) type) {
obstack_free(type_obst, type);
}
specifiers->type = result;
-
- fprintf(stderr, "Specifiers type: ");
- print_type(stderr, result);
- fprintf(stderr, "\n");
}
static
}
static
-type_t *parse_pointer(type_t *type)
+int parse_pointers(void)
{
+ int result = 0;
+
while(token.type == '*') {
- /* pointer */
next_token();
+ result++;
+ }
+ return result;
+}
+
+static
+type_t *make_pointers(type_t *type, int count)
+{
+ for(int i = 0; i < count; ++i) {
pointer_type_t *pointer_type
= allocate_type_zero(sizeof(pointer_type[0]));
pointer_type->type.type = TYPE_POINTER;
}
static
-void parse_identifier_list()
+void parse_identifier_list(void)
{
while(1) {
if(token.type != T_IDENTIFIER) {
}
static
-void parse_parameter()
+declaration_t *parse_parameter(void)
{
- if(token.type == T_DOTDOTDOT) {
- next_token();
- return;
- }
-
declaration_specifiers_t specifiers;
memset(&specifiers, 0, sizeof(specifiers));
parse_declaration_specifiers(&specifiers);
- specifiers.type = parse_pointer(specifiers.type);
- if(token.type == '(' || token.type == T_IDENTIFIER) {
- declaration_t declaration;
- memset(&declaration, 0, sizeof(declaration));
- parse_declarator(&declaration, specifiers.storage_class,
- specifiers.type);
+ declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
+ parse_declarator(declaration, specifiers.storage_class,
+ specifiers.type, 1);
+
+#if 0
+ if(declaration->symbol != NULL) {
+ maybe_push_declaration(declaration);
+ record_declaration(declaration);
}
+#endif
+
+ return declaration;
}
static
-void parse_parameters()
+void parse_parameters(method_type_t *type)
{
if(token.type == T_IDENTIFIER) {
- parse_identifier_list();
+ symbol_t *symbol = token.v.symbol;
+ declaration_t *declaration = symbol->declaration;
+ if(declaration == NULL
+ || declaration->storage_class != STORAGE_CLASS_TYPEDEF) {
+ parse_identifier_list();
+ return;
+ }
+ }
+
+ if(token.type == ')') {
+ type->unspecified_parameters = 1;
+ return;
+ }
+ if(token.type == T_void && la(1)->type == ')') {
+ next_token();
return;
}
+ declaration_t *declaration;
+ method_parameter_type_t *parameter_type;
+ method_parameter_type_t *last_parameter_type = NULL;
+
while(1) {
switch(token.type) {
case T_DOTDOTDOT:
+ next_token();
+ type->variadic = 1;
+ return;
+
+ case T_IDENTIFIER:
DECLARATION_START
- parse_parameter();
+ declaration = parse_parameter();
+
+ parameter_type = allocate_type_zero(sizeof(parameter_type[0]));
+ parameter_type->type = declaration->type;
+ parameter_type->symbol = declaration->symbol;
+
+ if(last_parameter_type != NULL) {
+ last_parameter_type->next = parameter_type;
+ } else {
+ type->parameter_types = parameter_type;
+ }
+ last_parameter_type = parameter_type;
break;
+
default:
return;
}
{
while(token.type == T___attribute__) {
next_token();
- fprintf(stderr, "TODO: __attribute__ not handled yet\n");
expect_void('(');
int depth = 1;
}
}
+typedef struct declarator_part declarator_part;
+struct declarator_part {
+ int pointers;
+ method_type_t *method_type;
+ declarator_part *inner;
+};
+
+static struct obstack temp_obst;
+
+static
+declarator_part *parse_inner_declarator(declaration_t *declaration)
+{
+ declarator_part *part = obstack_alloc(&temp_obst, sizeof(part[0]));
+ memset(part, 0, sizeof(part[0]));
+
+ part->pointers = parse_pointers();
+
+ switch(token.type) {
+ case T_IDENTIFIER:
+ declaration->symbol = token.v.symbol;
+ declaration->source_position = token.source_position;
+ next_token();
+ break;
+ case '(':
+ next_token();
+ part->inner = parse_inner_declarator(declaration);
+ expect(')');
+ break;
+ default:
+ parse_error_expected("problem while parsing declarator", T_IDENTIFIER,
+ '(', 0);
+ }
+
+ while(1) {
+ switch(token.type) {
+ case '(':
+ next_token();
+
+#if 0
+ int top = environment_top();
+ context_t *last_context = context;
+ set_context(&declaration->context);
+#endif
+
+ method_type_t *method_type
+ = allocate_type_zero(sizeof(method_type[0]));
+ method_type->type.type = TYPE_METHOD;
+
+ parse_parameters(method_type);
+
+#if 0
+ assert(context == &declaration->context);
+ set_context(last_context);
+ environment_pop_to(top);
+#endif
+
+ part->method_type = method_type;
+
+ expect(')');
+ break;
+ case '[':
+ next_token();
+
+ if(token.type == T_static) {
+ next_token();
+ }
+
+ unsigned type_qualifiers = parse_type_qualifiers();
+ if(type_qualifiers != 0) {
+ if(token.type == T_static) {
+ next_token();
+ }
+ }
+
+ /* TODO */
+
+ if(token.type == '*' && la(1)->type == ']') {
+ next_token();
+ } else if(token.type != ']') {
+ parse_assignment_expression();
+ }
+
+ expect(']');
+ break;
+ default:
+ goto declarator_finished;
+ }
+ }
+
+declarator_finished:
+ parse_attributes();
+
+ return part;
+}
+
+static
+type_t *construct_declarator_type(declarator_part *part, type_t *type)
+{
+ do {
+ type = make_pointers(type, part->pointers);
+
+ method_type_t *method_type = part->method_type;
+ if(method_type != NULL) {
+ method_type->result_type = type;
+
+ type = (type_t*) method_type;
+ }
+
+ part = part->inner;
+ } while(part != NULL);
+
+ return type;
+}
+
+static
+void parse_declarator(declaration_t *declaration, storage_class_t storage_class,
+ type_t *type, int may_omit_identifier)
+{
+ (void) may_omit_identifier;
+ declarator_part *part = parse_inner_declarator(declaration);
+
+ declaration->type = construct_declarator_type(part, type);
+ declaration->storage_class = storage_class;
+ obstack_free(&temp_obst, part);
+}
+
+#if 0
static
void parse_declarator(declaration_t *declaration, storage_class_t storage_class,
- type_t *type)
+ type_t *type, int may_omit_identifier)
{
- type = parse_pointer(type);
+ ir_type *outer_type = parse_pointers(type);
+
declaration->storage_class = storage_class;
- declaration->type = type;
+ declaration->type = outer_type;
switch(token.type) {
case T_IDENTIFIER:
- declaration->symbol = token.v.symbol;
+ declaration->symbol = token.v.symbol;
+ declaration->source_position = token.source_position;
next_token();
break;
case '(':
next_token();
- parse_declarator(declaration, storage_class, type);
+ parse_declarator(declaration, storage_class, type, 0);
expect_void(')');
break;
default:
+ if(may_omit_identifier)
+ goto declarator_finished;
parse_error_expected("problem while parsing declarator", T_IDENTIFIER,
'(', 0);
}
case '(':
next_token();
- parse_parameters();
+ int top = environment_top();
+ context_t *last_context = context;
+ set_context(&declaration->context);
+
+ method_type_t *method_type
+ = allocate_type_zero(sizeof(method_type[0]));
+ method_type->type.type = TYPE_METHOD;
+ method_type->result_type = outer_type;
+
+ parse_parameters(method_type);
+
+ assert(context == &declaration->context);
+ set_context(last_context);
+ environment_pop_to(top);
+
+ replace_type(&declaration->type, outer_type,
+ method_type);
expect_void(')');
break;
}
}
- if(token.type == '*' /* TODO: && lookahead == ']' */) {
+ if(token.type == '*' && la(1)->type == ']') {
next_token();
} else if(token.type != ']') {
parse_assignment_expression();
declarator_finished:
parse_attributes();
+}
+#endif
- fprintf(stderr, "Declarator type: ");
- print_type(stderr, type);
- fprintf(stderr, "\n");
+static void record_declaration(declaration_t *declaration)
+{
+ if(last_declaration != NULL) {
+ last_declaration->next = declaration;
+ } else {
+ if(context != NULL)
+ context->declarations = declaration;
+ }
+ last_declaration = declaration;
+}
+static
+void maybe_push_declaration(declaration_t *declaration)
+{
symbol_t *symbol = declaration->symbol;
if(symbol != NULL) {
declaration_t *declaration = allocate_ast_zero(sizeof(declaration[0]));
parse_declarator(declaration, specifiers->storage_class,
- specifiers->type);
+ specifiers->type, 0);
+ maybe_push_declaration(declaration);
+ record_declaration(declaration);
if(token.type == '=') {
next_token();
if(token.type == '{') {
parse_assignment_expression();
}
} else if(token.type == '{') {
- parse_compound_statement();
+ statement_t *statement = parse_compound_statement();
+ declaration->statement = statement;
return;
}
void parse_struct_declarators(const declaration_specifiers_t *specifiers)
{
while(1) {
- declaration_t declaration;
- compound_entry_t *entry = allocate_ast_zero(sizeof(entry[0]));
-
if(token.type == ':') {
next_token();
parse_constant_expression();
- /* TODO */
+ /* TODO (bitfields) */
} else {
- parse_declarator(&declaration, specifiers->storage_class,
- specifiers->type);
+ declaration_t *declaration
+ = allocate_ast_zero(sizeof(declaration[0]));
+ parse_declarator(declaration, specifiers->storage_class,
+ specifiers->type, 0);
+ maybe_push_declaration(declaration);
+ record_declaration(declaration);
if(token.type == ':') {
next_token();
parse_constant_expression();
- /* TODO */
+ /* TODO (bitfields) */
}
}
expect_void(';');
}
-static compound_entry_t *parse_compound_type_entries(void)
+static void parse_compound_type_entries(void)
{
eat('{');
- compound_entry_t *entries = NULL;
-
while(token.type != '}' && token.type != T_EOF) {
declaration_specifiers_t specifiers;
memset(&specifiers, 0, sizeof(specifiers));
parse_struct_declarators(&specifiers);
}
+ if(token.type == T_EOF) {
+ parse_error("unexpected error while parsing struct");
+ }
next_token();
-
- return entries;
}
void parse_declaration(void)
/* TODO not correct storage class elements are not allowed here */
parse_declaration_specifiers(&specifiers);
- specifiers.type = parse_pointer(specifiers.type);
+ int pointers = parse_pointers();
+ specifiers.type = make_pointers(specifiers.type, pointers);
return specifiers.type;
}
{
eat('{');
- int top = environment_top();
+ compound_statement_t *compound_statement
+ = allocate_ast_zero(sizeof(compound_statement[0]));
+ compound_statement->statement.type = STATEMENT_COMPOUND;
+
+ int top = environment_top();
+ context_t *last_context = context;
+ set_context(&compound_statement->context);
while(token.type != '}') {
parse_statement();
}
+ assert(context == &compound_statement->context);
+ set_context(last_context);
environment_pop_to(top);
next_token();
- return NULL;
+ return (statement_t*) compound_statement;
}
static
{
translation_unit_t *unit = allocate_ast_zero(sizeof(unit[0]));
- assert(translation_unit == NULL);
assert(context == NULL);
- translation_unit = unit;
+ set_context(&unit->context);
while(token.type != T_EOF) {
parse_declaration();
}
- translation_unit = NULL;
+ assert(context == &unit->context);
+ context = NULL;
+ last_declaration = NULL;
+
return unit;
}
void init_parser(void)
{
init_expression_parsers();
+ obstack_init(&temp_obst);
}
void exit_parser(void)
{
+ obstack_free(&temp_obst, NULL);
}
projects / cparser / blobdiff