libctf, include: support an alternative encoding for nonrepresentable types

[deliverable/binutils-gdb.git] / libctf / ctf-create.c

diff --git a/libctf/ctf-create.c b/libctf/ctf-create.c
index e87b91e928e8549235eae38171714da6bf4825ee..2d232d40037bed09e3a030cdfc5295bab07c7d0b 100644 (file)
--- a/libctf/ctf-create.c
+++ b/libctf/ctf-create.c
@@ -965,6 +965,39 @@ ctf_add_forward (ctf_dict_t *fp, uint32_t flag, const char *name,
   return type;
 }
 
+ctf_id_t
+ctf_add_unknown (ctf_dict_t *fp, uint32_t flag, const char *name)
+{
+  ctf_dtdef_t *dtd;
+  ctf_id_t type = 0;
+
+  /* If a type is already defined with this name, error (if not CTF_K_UNKNOWN)
+     or just return it.  */
+
+  if (name != NULL && name[0] != '\0' && flag == CTF_ADD_ROOT
+      && (type = ctf_lookup_by_rawname (fp, CTF_K_UNKNOWN, name)))
+    {
+      if (ctf_type_kind (fp, type) == CTF_K_UNKNOWN)
+       return type;
+      else
+       {
+         ctf_err_warn (fp, 1, ECTF_CONFLICT,
+                       _("ctf_add_unknown: cannot add unknown type "
+                         "named %s: type of this name already defined"),
+                       name ? name : _("(unnamed type)"));
+         return (ctf_set_errno (fp, ECTF_CONFLICT));
+       }
+    }
+
+  if ((type = ctf_add_generic (fp, flag, name, CTF_K_UNKNOWN, 0, &dtd)) == CTF_ERR)
+    return CTF_ERR;            /* errno is set for us.  */
+
+  dtd->dtd_data.ctt_info = CTF_TYPE_INFO (CTF_K_UNKNOWN, flag, 0);
+  dtd->dtd_data.ctt_type = 0;
+
+  return type;
+}
+
 ctf_id_t
 ctf_add_typedef (ctf_dict_t *fp, uint32_t flag, const char *name,
                 ctf_id_t ref)