* defs.h (xsnprintf): New prototype.

* utils.c (xsnprintf): New function.

gdb/utils.c

@@ -1079,6 +1079,20 @@ xstrvprintf (const char *format, va_list ap)
   return ret;
 }
 
+int
+xsnprintf (char *str, size_t size, const char *format, ...)
+{
+  va_list args;
+  int ret;
+
+  va_start (args, format);
+  ret = vsnprintf (str, size, format, args);
+  gdb_assert (ret < size);
+  va_end (args);
+
+  return ret;
+}
+
 /* My replacement for the read system call.
    Used like `read' but keeps going if `read' returns too soon.  */