I give up with modulo shift - doing the right thing is not compatible with firm at...
[cparser] / type.c
diff --git a/type.c b/type.c
index ce14faa..9be93a7 100644 (file)
--- a/type.c
+++ b/type.c
@@ -295,28 +295,33 @@ void print_imaginary_type(const imaginary_type_t *type)
  */
 static void print_function_type_pre(const function_type_t *type, bool top)
 {
+       switch (type->linkage) {
+               case LINKAGE_INVALID:
+                       break;
+
+               case LINKAGE_C:
+                       if (c_mode & _CXX)
+                               fputs("extern \"C\" ",   out);
+                       break;
+
+               case LINKAGE_CXX:
+                       if (!(c_mode & _CXX))
+                               fputs("extern \"C++\" ", out);
+                       break;
+       }
+
        print_type_qualifiers(type->base.qualifiers);
        if (type->base.qualifiers != 0)
                fputc(' ', out);
 
-
        intern_print_type_pre(type->return_type, false);
 
        switch (type->calling_convention) {
-       case CC_CDECL:
-               fputs("__cdecl ", out);
-               break;
-       case CC_STDCALL:
-               fputs("__stdcall ", out);
-               break;
-       case CC_FASTCALL:
-               fputs("__fastcall ", out);
-               break;
-       case CC_THISCALL:
-               fputs("__thiscall ", out);
-               break;
-       case CC_DEFAULT:
-               break;
+       case CC_CDECL:    fputs("__cdecl ",    out); break;
+       case CC_STDCALL:  fputs("__stdcall ",  out); break;
+       case CC_FASTCALL: fputs("__fastcall ", out); break;
+       case CC_THISCALL: fputs("__thiscall ", out); break;
+       case CC_DEFAULT:  break;
        }
 
        /* don't emit parenthesis if we're the toplevel type... */
@@ -386,12 +391,29 @@ static void print_function_type_post(const function_type_t *type,
 static void print_pointer_type_pre(const pointer_type_t *type)
 {
        intern_print_type_pre(type->points_to, false);
-       fputs("*", out);
+       variable_t *const variable = type->base_variable;
+       if (variable != NULL) {
+               fputs(" __based(", out);
+               fputs(variable->base.base.symbol->string, out);
+               fputs(") ", out);
+       }
+       fputc('*', out);
        print_type_qualifiers(type->base.qualifiers);
        if (type->base.qualifiers != 0)
                fputc(' ', out);
 }
 
+/**
+ * Prints the prefix part of a reference type.
+ *
+ * @param type   The reference type.
+ */
+static void print_reference_type_pre(const reference_type_t *type)
+{
+       intern_print_type_pre(type->refers_to, false);
+       fputc('&', out);
+}
+
 /**
  * Prints the postfix part of a pointer type.
  *
@@ -402,6 +424,16 @@ static void print_pointer_type_post(const pointer_type_t *type)
        intern_print_type_post(type->points_to, false);
 }
 
+/**
+ * Prints the postfix part of a reference type.
+ *
+ * @param type   The reference type.
+ */
+static void print_reference_type_post(const reference_type_t *type)
+{
+       intern_print_type_post(type->refers_to, false);
+}
+
 /**
  * Prints the prefix part of an array type.
  *
@@ -462,9 +494,9 @@ void print_enum_definition(const enum_t *enume)
               entry = entry->base.next) {
 
                print_indent();
-               fprintf(out, "%s", entry->base.symbol->string);
+               fputs(entry->base.symbol->string, out);
                if (entry->enum_value.value != NULL) {
-                       fprintf(out, " = ");
+                       fputs(" = ", out);
 
                        /* skip the implicit cast */
                        expression_t *expression = entry->enum_value.value;
@@ -473,12 +505,12 @@ void print_enum_definition(const enum_t *enume)
                        }
                        print_expression(expression);
                }
-               fprintf(out, ",\n");
+               fputs(",\n", out);
        }
 
        change_indent(-1);
        print_indent();
-       fputs("}", out);
+       fputc('}', out);
 }
 
 /**
@@ -521,7 +553,10 @@ void print_compound_definition(const compound_t *compound)
 
        change_indent(-1);
        print_indent();
-       fputs("}", out);
+       fputc('}', out);
+       if (compound->modifiers & DM_TRANSPARENT_UNION) {
+               fputs("__attribute__((__transparent_union__))", out);
+       }
 }
 
 /**
@@ -620,6 +655,9 @@ static void intern_print_type_pre(const type_t *const type, const bool top)
        case TYPE_POINTER:
                print_pointer_type_pre(&type->pointer);
                return;
+       case TYPE_REFERENCE:
+               print_reference_type_pre(&type->reference);
+               return;
        case TYPE_BITFIELD:
                intern_print_type_pre(type->bitfield.base_type, top);
                return;
@@ -651,6 +689,9 @@ static void intern_print_type_post(const type_t *const type, const bool top)
        case TYPE_POINTER:
                print_pointer_type_post(&type->pointer);
                return;
+       case TYPE_REFERENCE:
+               print_reference_type_post(&type->reference);
+               return;
        case TYPE_ARRAY:
                print_array_type_post(&type->array);
                return;
@@ -670,6 +711,10 @@ static void intern_print_type_post(const type_t *const type, const bool top)
        case TYPE_TYPEDEF:
                break;
        }
+
+       if (type->base.modifiers & DM_TRANSPARENT_UNION) {
+               fputs("__attribute__((__transparent_union__))", out);
+       }
 }
 
 /**
@@ -718,6 +763,7 @@ static size_t get_type_size(const type_t *type)
        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_REFERENCE:       return sizeof(reference_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);
@@ -999,6 +1045,7 @@ bool is_type_incomplete(const type_t *type)
        case TYPE_BITFIELD:
        case TYPE_FUNCTION:
        case TYPE_POINTER:
+       case TYPE_REFERENCE:
        case TYPE_BUILTIN:
        case TYPE_ERROR:
                return false;
@@ -1029,6 +1076,9 @@ static bool function_types_compatible(const function_type_t *func1,
        if (!types_compatible(ret1, ret2))
                return false;
 
+       if (func1->linkage != func2->linkage)
+               return false;
+
        if (func1->calling_convention != func2->calling_convention)
                return false;
 
@@ -1117,6 +1167,12 @@ bool types_compatible(const type_t *type1, const type_t *type2)
                return types_compatible(to1, to2);
        }
 
+       case TYPE_REFERENCE: {
+               const type_t *const to1 = skip_typeref(type1->reference.refers_to);
+               const type_t *const to2 = skip_typeref(type2->reference.refers_to);
+               return types_compatible(to1, to2);
+       }
+
        case TYPE_COMPOUND_STRUCT:
        case TYPE_COMPOUND_UNION:
        case TYPE_ENUM:
@@ -1418,14 +1474,56 @@ type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
        type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
        memset(type, 0, sizeof(pointer_type_t));
 
-       type->kind              = TYPE_POINTER;
-       type->base.qualifiers   = qualifiers;
-       type->base.alignment    = 0;
-       type->pointer.points_to = points_to;
+       type->kind                  = TYPE_POINTER;
+       type->base.qualifiers       = qualifiers;
+       type->base.alignment        = 0;
+       type->pointer.points_to     = points_to;
+       type->pointer.base_variable = NULL;
+
+       return identify_new_type(type);
+}
+
+/**
+ * Creates a new reference type.
+ *
+ * @param refers_to   The referred-to type for the new type.
+ */
+type_t *make_reference_type(type_t *refers_to)
+{
+       type_t *type = obstack_alloc(type_obst, sizeof(reference_type_t));
+       memset(type, 0, sizeof(reference_type_t));
+
+       type->kind                = TYPE_REFERENCE;
+       type->base.qualifiers     = 0;
+       type->base.alignment      = 0;
+       type->reference.refers_to = refers_to;
+
+       return identify_new_type(type);
+}
+
+/**
+ * Creates a new based pointer type.
+ *
+ * @param points_to   The points-to type for the new type.
+ * @param qualifiers  Type qualifiers for the new type.
+ * @param variable    The based variable
+ */
+type_t *make_based_pointer_type(type_t *points_to,
+                                                               type_qualifiers_t qualifiers, variable_t *variable)
+{
+       type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
+       memset(type, 0, sizeof(pointer_type_t));
+
+       type->kind                  = TYPE_POINTER;
+       type->base.qualifiers       = qualifiers;
+       type->base.alignment        = 0;
+       type->pointer.points_to     = points_to;
+       type->pointer.base_variable = variable;
 
        return identify_new_type(type);
 }
 
+
 type_t *make_array_type(type_t *element_type, size_t size,
                         type_qualifiers_t qualifiers)
 {