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-rw-r--r--libio/strfile.h20
1 files changed, 19 insertions, 1 deletions
diff --git a/libio/strfile.h b/libio/strfile.h
index 4934a06e3c..76044f8927 100644
--- a/libio/strfile.h
+++ b/libio/strfile.h
@@ -36,9 +36,27 @@ struct _IO_str_fields
   _IO_free_type _free_buffer;
 };
 
-typedef struct _IO_strfile_
+/* This is needed for the Irix6 N32 ABI, which has a 64 bit off_t type,
+   but a 32 bit pointer type.  In this case, we get 4 bytes of padding
+   after the vtable pointer.  Putting them in a structure together solves
+   this problem.  */
+
+struct _IO_streambuf
 {
   struct _IO_FILE _f;
   const void *_vtable;
+};
+
+typedef struct _IO_strfile_
+{
+  struct _IO_streambuf _sbf;
   struct _IO_str_fields _s;
 } _IO_strfile;
+
+/* dynamic: set when the array object is allocated (or reallocated)  as
+   necessary to hold a character sequence that can change in length. */
+#define _IO_STR_DYNAMIC(FP) ((FP)->_s._allocate_buffer != (_IO_alloc_type)0)
+
+/* frozen: set when the program has requested that the array object not
+   be altered, reallocated, or freed. */
+#define _IO_STR_FROZEN(FP) ((FP)->_f._IO_file_flags & _IO_USER_BUF)