X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=type.c;h=f9d76c117677ec6e9ce0793eb201314bb50bc10d;hb=2f4d5b48891698c9c271382559f5e0380f5431b4;hp=bcc1b255b8466450f79e214a0c19a1c9433ac594;hpb=9dc06dc8e3e1560d174f728bd2254090dd9c8a5d;p=cparser diff --git a/type.c b/type.c index bcc1b25..f9d76c1 100644 --- a/type.c +++ b/type.c @@ -10,10 +10,9 @@ static struct obstack _type_obst; struct obstack *type_obst = &_type_obst; static FILE *out; static int type_visited = 0; -static bool print_compound_entries; -static void intern_print_type_pre(type_t *type); -static void intern_print_type_post(type_t *type); +static void intern_print_type_pre(type_t *type, bool top); +static void intern_print_type_post(type_t *type, bool top); void init_types(void) { @@ -30,18 +29,12 @@ void type_set_output(FILE *stream) out = stream; } -void set_print_compound_entries(bool enabled) -{ - print_compound_entries = enabled; -} - void inc_type_visited(void) { type_visited++; } -static -void print_type_qualifiers(unsigned qualifiers) +void print_type_qualifiers(type_qualifiers_t qualifiers) { if(qualifiers & TYPE_QUALIFIER_CONST) fputs("const ", out); if(qualifiers & TYPE_QUALIFIER_VOLATILE) fputs("volatile ", out); @@ -77,22 +70,24 @@ void print_atomic_type(const atomic_type_t *type) fputs(s, out); } -static void print_function_type_pre(const function_type_t *type) +static void print_function_type_pre(const function_type_t *type, bool top) { print_type_qualifiers(type->type.qualifiers); - intern_print_type_pre(type->result_type); + intern_print_type_pre(type->return_type, false); - /* TODO: don't emit braces if we're the toplevel type... */ - fputc('(', out); + /* don't emit braces if we're the toplevel type... */ + if(!top) + fputc('(', out); } static void print_function_type_post(const function_type_t *type, - const context_t *context) + const context_t *context, bool top) { - /* TODO: don't emit braces if we're the toplevel type... */ - intern_print_type_post(type->result_type); - fputc(')', out); + intern_print_type_post(type->return_type, false); + /* don't emit braces if we're the toplevel type... */ + if(!top) + fputc(')', out); fputc('(', out); @@ -133,17 +128,21 @@ static void print_function_type_post(const function_type_t *type, fputc(')', out); } -static -void print_pointer_type_pre(const pointer_type_t *type) +static void print_pointer_type_pre(const pointer_type_t *type) { - intern_print_type_pre(type->points_to); + intern_print_type_pre(type->points_to, false); fputs("*", out); print_type_qualifiers(type->type.qualifiers); } static void print_pointer_type_post(const pointer_type_t *type) { - intern_print_type_post(type->points_to); + intern_print_type_post(type->points_to, false); +} + +static void print_array_type_pre(const array_type_t *type) +{ + intern_print_type_pre(type->element_type, false); } static void print_array_type_post(const array_type_t *type) @@ -157,6 +156,7 @@ static void print_array_type_post(const array_type_t *type) print_expression(type->size); } fputc(']', out); + intern_print_type_post(type->element_type, false); } void print_enum_definition(const declaration_t *declaration) @@ -173,7 +173,7 @@ void print_enum_definition(const declaration_t *declaration) fprintf(out, "%s", entry->symbol->string); if(entry->init.initializer != NULL) { fprintf(out, " = "); - print_initializer(entry->init.initializer); + print_expression(entry->init.enum_value); } fprintf(out, ",\n"); } @@ -251,54 +251,55 @@ static void print_typeof_type_pre(typeof_type_t *type) fputc(')', out); } -static void intern_print_type_pre(type_t *type) +static void intern_print_type_pre(type_t *type, bool top) { switch(type->type) { case TYPE_INVALID: fputs("invalid", out); return; case TYPE_ENUM: - print_type_enum((enum_type_t*) type); + print_type_enum(&type->enumt); return; case TYPE_ATOMIC: - print_atomic_type((atomic_type_t*) type); + print_atomic_type(&type->atomic); return; case TYPE_COMPOUND_STRUCT: case TYPE_COMPOUND_UNION: - print_compound_type((compound_type_t*) type); + print_compound_type(&type->compound); return; case TYPE_BUILTIN: - fputs(((builtin_type_t*) type)->symbol->string, out); + fputs(type->builtin.symbol->string, out); return; case TYPE_FUNCTION: - print_function_type_pre((function_type_t*) type); + print_function_type_pre(&type->function, top); return; case TYPE_POINTER: - print_pointer_type_pre((pointer_type_t*) type); + print_pointer_type_pre(&type->pointer); return; case TYPE_ARRAY: + print_array_type_pre(&type->array); return; case TYPE_TYPEDEF: - print_typedef_type_pre((typedef_type_t*) type); + print_typedef_type_pre(&type->typedeft); return; case TYPE_TYPEOF: - print_typeof_type_pre((typeof_type_t*) type); + print_typeof_type_pre(&type->typeoft); return; } fputs("unknown", out); } -static void intern_print_type_post(type_t *type) +static void intern_print_type_post(type_t *type, bool top) { switch(type->type) { case TYPE_FUNCTION: - print_function_type_post((const function_type_t*) type, NULL); + print_function_type_post(&type->function, NULL, top); return; case TYPE_POINTER: - print_pointer_type_post((const pointer_type_t*) type); + print_pointer_type_post(&type->pointer); return; case TYPE_ARRAY: - print_array_type_post((const array_type_t*) type); + print_array_type_post(&type->array); return; case TYPE_INVALID: case TYPE_ATOMIC: @@ -325,16 +326,64 @@ void print_type_ext(type_t *type, const symbol_t *symbol, return; } - intern_print_type_pre(type); + intern_print_type_pre(type, true); if(symbol != NULL) { fputc(' ', out); fputs(symbol->string, out); } if(type->type == TYPE_FUNCTION) { - print_function_type_post((const function_type_t*) type, context); + print_function_type_post(&type->function, context, true); } else { - intern_print_type_post(type); + intern_print_type_post(type, true); + } +} + +static size_t get_type_size(type_t *type) +{ + switch(type->type) { + case TYPE_ATOMIC: return sizeof(atomic_type_t); + case TYPE_COMPOUND_STRUCT: + case TYPE_COMPOUND_UNION: return sizeof(compound_type_t); + case TYPE_ENUM: return sizeof(enum_type_t); + case TYPE_FUNCTION: return sizeof(function_type_t); + case TYPE_POINTER: return sizeof(pointer_type_t); + case TYPE_ARRAY: return sizeof(array_type_t); + case TYPE_BUILTIN: return sizeof(builtin_type_t); + case TYPE_TYPEDEF: return sizeof(typedef_type_t); + case TYPE_TYPEOF: return sizeof(typeof_type_t); + case TYPE_INVALID: panic("invalid type found"); + } + panic("unknown type found"); +} + +/** + * duplicates a type + * note that this does not produce a deep copy! + */ +type_t *duplicate_type(type_t *type) +{ + size_t size = get_type_size(type); + + type_t *copy = obstack_alloc(type_obst, size); + memcpy(copy, type, size); + + return copy; +} + +type_t *get_unqualified_type(type_t *type) +{ + if(type->base.qualifiers == TYPE_QUALIFIER_NONE) + return type; + + type_t *unqualified_type = duplicate_type(type); + unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE; + + type_t *result = typehash_insert(unqualified_type); + if(result != unqualified_type) { + obstack_free(type_obst, unqualified_type); } + + return result; } bool type_valid(const type_t *type) @@ -344,14 +393,15 @@ bool type_valid(const type_t *type) bool is_type_integer(const type_t *type) { + assert(!is_typeref(type)); + if(type->type == TYPE_ENUM) return true; if(type->type != TYPE_ATOMIC) return false; - atomic_type_t *atomic_type = (atomic_type_t*) type; - switch(atomic_type->atype) { + switch(type->atomic.atype) { case ATOMIC_TYPE_BOOL: case ATOMIC_TYPE_CHAR: case ATOMIC_TYPE_SCHAR: @@ -372,11 +422,12 @@ bool is_type_integer(const type_t *type) bool is_type_floating(const type_t *type) { + assert(!is_typeref(type)); + if(type->type != TYPE_ATOMIC) return false; - atomic_type_t *atomic_type = (atomic_type_t*) type; - switch(atomic_type->atype) { + switch(type->atomic.atype) { case ATOMIC_TYPE_FLOAT: case ATOMIC_TYPE_DOUBLE: case ATOMIC_TYPE_LONG_DOUBLE: @@ -384,8 +435,6 @@ bool is_type_floating(const type_t *type) case ATOMIC_TYPE_FLOAT_COMPLEX: case ATOMIC_TYPE_DOUBLE_COMPLEX: case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX: -#endif -#ifdef PROVIDE_IMAGINARY case ATOMIC_TYPE_FLOAT_IMAGINARY: case ATOMIC_TYPE_DOUBLE_IMAGINARY: case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY: @@ -398,6 +447,8 @@ bool is_type_floating(const type_t *type) bool is_type_signed(const type_t *type) { + assert(!is_typeref(type)); + /* enum types are int for now */ if(type->type == TYPE_ENUM) return true; @@ -405,8 +456,7 @@ bool is_type_signed(const type_t *type) if(type->type != TYPE_ATOMIC) return false; - atomic_type_t *atomic_type = (atomic_type_t*) type; - switch(atomic_type->atype) { + switch(type->atomic.atype) { case ATOMIC_TYPE_CHAR: case ATOMIC_TYPE_SCHAR: case ATOMIC_TYPE_SHORT: @@ -420,8 +470,6 @@ bool is_type_signed(const type_t *type) case ATOMIC_TYPE_FLOAT_COMPLEX: case ATOMIC_TYPE_DOUBLE_COMPLEX: case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX: -#endif -#ifdef PROVIDE_IMAGINARY case ATOMIC_TYPE_FLOAT_IMAGINARY: case ATOMIC_TYPE_DOUBLE_IMAGINARY: case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY: @@ -436,8 +484,9 @@ bool is_type_signed(const type_t *type) case ATOMIC_TYPE_ULONGLONG: return false; - case ATOMIC_TYPE_INVALID: case ATOMIC_TYPE_VOID: + case ATOMIC_TYPE_INVALID: + case ATOMIC_TYPE_LAST: return false; } @@ -447,42 +496,52 @@ bool is_type_signed(const type_t *type) bool is_type_arithmetic(const type_t *type) { + assert(!is_typeref(type)); + if(is_type_integer(type) || is_type_floating(type)) - return 1; + return true; - return 0; + return false; } bool is_type_scalar(const type_t *type) { - if(type->type == TYPE_POINTER) - return 1; + assert(!is_typeref(type)); + + switch (type->type) { + case TYPE_POINTER: return true; + case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type); + default: break; + } return is_type_arithmetic(type); } bool is_type_incomplete(const type_t *type) { + assert(!is_typeref(type)); + switch(type->type) { case TYPE_COMPOUND_STRUCT: case TYPE_COMPOUND_UNION: { - const compound_type_t *compound_type - = (const compound_type_t*) type; - declaration_t *declaration = compound_type->declaration; + const compound_type_t *compound_type = &type->compound; + declaration_t *declaration = compound_type->declaration; return !declaration->init.is_defined; } case TYPE_FUNCTION: return true; case TYPE_ARRAY: + return type->array.size == NULL; + case TYPE_ATOMIC: case TYPE_POINTER: case TYPE_ENUM: + case TYPE_BUILTIN: return false; case TYPE_TYPEDEF: case TYPE_TYPEOF: - case TYPE_BUILTIN: panic("is_type_incomplete called without typerefs skipped"); case TYPE_INVALID: break; @@ -491,46 +550,136 @@ bool is_type_incomplete(const type_t *type) panic("invalid type found"); } -bool types_compatible(const type_t *type1, const type_t *type2) +static bool function_types_compatible(const function_type_t *func1, + const function_type_t *func2) +{ + if(!types_compatible(func1->return_type, func2->return_type)) + return false; + + /* can parameters be compared? */ + if(func1->unspecified_parameters || func2->unspecified_parameters) + return true; + + if(func1->variadic != func2->variadic) + return false; + + /* TODO: handling of unspecified parameters not correct yet */ + + /* all argument types must be compatible */ + function_parameter_t *parameter1 = func1->parameters; + function_parameter_t *parameter2 = func2->parameters; + for( ; parameter1 != NULL && parameter2 != NULL; + parameter1 = parameter1->next, parameter2 = parameter2->next) { + type_t *parameter1_type = skip_typeref(parameter1->type); + type_t *parameter2_type = skip_typeref(parameter2->type); + + parameter1_type = get_unqualified_type(parameter1_type); + parameter2_type = get_unqualified_type(parameter2_type); + + if(!types_compatible(parameter1_type, parameter2_type)) + return false; + } + /* same number of arguments? */ + if(parameter1 != NULL || parameter2 != NULL) + return false; + + return true; +} + +static bool array_types_compatible(const array_type_t *array1, + const array_type_t *array2) { - (void) type1; - (void) type2; + type_t *element_type1 = skip_typeref(array1->element_type); + type_t *element_type2 = skip_typeref(array2->element_type); + if(!types_compatible(element_type1, element_type2)) + return false; + + if(array1->size != NULL && array2->size != NULL) { + /* TODO: check if size expression evaulate to the same value + * if they are constant */ + } + return true; } +bool types_compatible(const type_t *type1, const type_t *type2) +{ + assert(!is_typeref(type1)); + assert(!is_typeref(type2)); + + /* shortcut: the same type is always compatible */ + if(type1 == type2) + return true; + + if(type1->base.qualifiers != type2->base.qualifiers) + return false; + if(type1->type != type2->type) + return false; + + switch(type1->type) { + case TYPE_FUNCTION: + return function_types_compatible(&type1->function, &type2->function); + case TYPE_ATOMIC: + return type1->atomic.atype == type2->atomic.atype; + case TYPE_ARRAY: + return array_types_compatible(&type1->array, &type2->array); + case TYPE_POINTER: + return types_compatible(type1->pointer.points_to, + type2->pointer.points_to); + case TYPE_COMPOUND_STRUCT: + case TYPE_COMPOUND_UNION: + case TYPE_ENUM: + case TYPE_BUILTIN: + /* TODO: not implemented */ + break; + + case TYPE_INVALID: + panic("invalid type found in compatible types"); + case TYPE_TYPEDEF: + case TYPE_TYPEOF: + panic("typerefs not skipped in compatible types?!?"); + } + + /* TODO: incomplete */ + return false; +} + bool pointers_compatible(const type_t *type1, const type_t *type2) { + assert(!is_typeref(type1)); + assert(!is_typeref(type2)); + assert(type1->type == TYPE_POINTER); assert(type2->type == TYPE_POINTER); - pointer_type_t *pointer_type1 = (pointer_type_t*) type1; - pointer_type_t *pointer_type2 = (pointer_type_t*) type2; - return types_compatible(pointer_type1->points_to, - pointer_type2->points_to); + /* TODO */ + return true; } type_t *skip_typeref(type_t *type) { + unsigned qualifiers = type->base.qualifiers; + while(1) { switch(type->type) { case TYPE_TYPEDEF: { - const typedef_type_t *typedef_type = (const typedef_type_t*) type; + qualifiers |= type->base.qualifiers; + const typedef_type_t *typedef_type = &type->typedeft; + if(typedef_type->resolved_type != NULL) { + type = typedef_type->resolved_type; + break; + } type = typedef_type->declaration->type; continue; } case TYPE_TYPEOF: { - const typeof_type_t *typeof_type = (const typeof_type_t *) type; + const typeof_type_t *typeof_type = &type->typeoft; if(typeof_type->typeof_type != NULL) { type = typeof_type->typeof_type; } else { - type = typeof_type->expression->datatype; + type = typeof_type->expression->base.datatype; } continue; } - case TYPE_BUILTIN: { - const builtin_type_t *builtin_type = (const builtin_type_t*) type; - type = builtin_type->real_type; - continue; - } default: break; } @@ -551,28 +700,28 @@ static type_t *identify_new_type(type_t *type) return result; } -type_t *make_atomic_type(atomic_type_type_t type, type_qualifier_t qualifiers) +type_t *make_atomic_type(atomic_type_type_t atype, type_qualifiers_t qualifiers) { - atomic_type_t *atomic_type - = obstack_alloc(type_obst, sizeof(atomic_type[0])); - memset(atomic_type, 0, sizeof(atomic_type[0])); - atomic_type->type.type = TYPE_ATOMIC; - atomic_type->type.qualifiers = qualifiers; - atomic_type->atype = type; + type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t)); + memset(type, 0, sizeof(atomic_type_t)); + + type->type = TYPE_ATOMIC; + type->base.qualifiers = qualifiers; + type->atomic.atype = atype; - return identify_new_type((type_t*) atomic_type); + return identify_new_type(type); } -type_t *make_pointer_type(type_t *points_to, type_qualifier_t qualifiers) +type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers) { - pointer_type_t *pointer_type - = obstack_alloc(type_obst, sizeof(pointer_type[0])); - memset(pointer_type, 0, sizeof(pointer_type[0])); - pointer_type->type.type = TYPE_POINTER; - pointer_type->type.qualifiers = qualifiers; - pointer_type->points_to = points_to; + type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t)); + memset(type, 0, sizeof(pointer_type_t)); + + type->type = TYPE_POINTER; + type->base.qualifiers = qualifiers; + type->pointer.points_to = points_to; - return identify_new_type((type_t*) pointer_type); + return identify_new_type(type); } static __attribute__((unused))