+/* See gdbtypes.h. */
+
+unsigned
+type_raw_align (struct type *type)
+{
+ if (type->align_log2 != 0)
+ return 1 << (type->align_log2 - 1);
+ return 0;
+}
+
+/* See gdbtypes.h. */
+
+unsigned
+type_align (struct type *type)
+{
+ unsigned raw_align = type_raw_align (type);
+ if (raw_align != 0)
+ return raw_align;
+
+ ULONGEST align = 0;
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_PTR:
+ case TYPE_CODE_FUNC:
+ case TYPE_CODE_FLAGS:
+ case TYPE_CODE_INT:
+ case TYPE_CODE_FLT:
+ case TYPE_CODE_ENUM:
+ case TYPE_CODE_REF:
+ case TYPE_CODE_RVALUE_REF:
+ case TYPE_CODE_CHAR:
+ case TYPE_CODE_BOOL:
+ case TYPE_CODE_DECFLOAT:
+ {
+ struct gdbarch *arch = get_type_arch (type);
+ align = gdbarch_type_align (arch, type);
+ }
+ break;
+
+ case TYPE_CODE_ARRAY:
+ case TYPE_CODE_COMPLEX:
+ case TYPE_CODE_TYPEDEF:
+ align = type_align (TYPE_TARGET_TYPE (type));
+ break;
+
+ case TYPE_CODE_STRUCT:
+ case TYPE_CODE_UNION:
+ {
+ if (TYPE_NFIELDS (type) == 0)
+ {
+ /* An empty struct has alignment 1. */
+ align = 1;
+ break;
+ }
+ for (unsigned i = 0; i < TYPE_NFIELDS (type); ++i)
+ {
+ ULONGEST f_align = type_align (TYPE_FIELD_TYPE (type, i));
+ if (f_align == 0)
+ {
+ /* Don't pretend we know something we don't. */
+ align = 0;
+ break;
+ }
+ if (f_align > align)
+ align = f_align;
+ }
+ }
+ break;
+
+ case TYPE_CODE_SET:
+ case TYPE_CODE_RANGE:
+ case TYPE_CODE_STRING:
+ /* Not sure what to do here, and these can't appear in C or C++
+ anyway. */
+ break;
+
+ case TYPE_CODE_METHODPTR:
+ case TYPE_CODE_MEMBERPTR:
+ align = TYPE_LENGTH (type);
+ break;
+
+ case TYPE_CODE_VOID:
+ align = 1;
+ break;
+
+ case TYPE_CODE_ERROR:
+ case TYPE_CODE_METHOD:
+ default:
+ break;
+ }
+
+ if ((align & (align - 1)) != 0)
+ {
+ /* Not a power of 2, so pass. */
+ align = 0;
+ }
+
+ return align;
+}
+
+/* See gdbtypes.h. */
+
+bool
+set_type_align (struct type *type, ULONGEST align)
+{
+ /* Must be a power of 2. Zero is ok. */
+ gdb_assert ((align & (align - 1)) == 0);
+
+ unsigned result = 0;
+ while (align != 0)
+ {
+ ++result;
+ align >>= 1;
+ }
+
+ if (result >= (1 << TYPE_ALIGN_BITS))
+ return false;
+
+ type->align_log2 = result;
+ return true;
+}
+