1 files changed, 88 insertions, 0 deletions
diff --git a/include/grub/list.h b/include/grub/list.h
new file mode 100644
index 0000000..b13acb9
--- /dev/null
+++ b/include/grub/list.h
@@ -0,0 +1,88 @@
+/* list.h - header for grub list */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2009  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GRUB_LIST_HEADER
+#define GRUB_LIST_HEADER 1
+
+#include <grub/symbol.h>
+#include <grub/err.h>
+#include <grub/compiler.h>
+
+struct grub_list
+{
+  struct grub_list *next;
+  struct grub_list **prev;
+};
+typedef struct grub_list *grub_list_t;
+
+void EXPORT_FUNC(grub_list_push) (grub_list_t *head, grub_list_t item);
+void EXPORT_FUNC(grub_list_remove) (grub_list_t item);
+
+#define FOR_LIST_ELEMENTS(var, list) for ((var) = (list); (var); (var) = (var)->next)
+#define FOR_LIST_ELEMENTS_NEXT(var, list) for ((var) = (var)->next; (var); (var) = (var)->next)
+#define FOR_LIST_ELEMENTS_SAFE(var, nxt, list) for ((var) = (list), (nxt) = ((var) ? (var)->next : 0); (var); (var) = (nxt), ((nxt) = (var) ? (var)->next : 0))
+
+static inline void *
+grub_bad_type_cast_real (int line, const char *file)
+     ATTRIBUTE_ERROR ("bad type cast between incompatible grub types");
+
+static inline void *
+grub_bad_type_cast_real (int line, const char *file)
+{
+  grub_fatal ("error:%s:%u: bad type cast between incompatible grub types",
+	      file, line);
+}
+
+#define grub_bad_type_cast() grub_bad_type_cast_real(__LINE__, GRUB_FILE)
+
+#define GRUB_FIELD_MATCH(ptr, type, field) \
+  ((char *) &(ptr)->field == (char *) &((type) (ptr))->field)
+
+#define GRUB_AS_LIST(ptr) \
+  (GRUB_FIELD_MATCH (ptr, grub_list_t, next) && GRUB_FIELD_MATCH (ptr, grub_list_t, prev) ? \
+   (grub_list_t) ptr : (grub_list_t) grub_bad_type_cast ())
+
+#define GRUB_AS_LIST_P(pptr) \
+  (GRUB_FIELD_MATCH (*pptr, grub_list_t, next) && GRUB_FIELD_MATCH (*pptr, grub_list_t, prev) ? \
+   (grub_list_t *) (void *) pptr : (grub_list_t *) grub_bad_type_cast ())
+
+struct grub_named_list
+{
+  struct grub_named_list *next;
+  struct grub_named_list **prev;
+  char *name;
+};
+typedef struct grub_named_list *grub_named_list_t;
+
+void * EXPORT_FUNC(grub_named_list_find) (grub_named_list_t head,
+					  const char *name);
+
+#define GRUB_AS_NAMED_LIST(ptr) \
+  ((GRUB_FIELD_MATCH (ptr, grub_named_list_t, next) \
+    && GRUB_FIELD_MATCH (ptr, grub_named_list_t, prev)	\
+    && GRUB_FIELD_MATCH (ptr, grub_named_list_t, name))? \
+   (grub_named_list_t) ptr : (grub_named_list_t) grub_bad_type_cast ())
+
+#define GRUB_AS_NAMED_LIST_P(pptr) \
+  ((GRUB_FIELD_MATCH (*pptr, grub_named_list_t, next) \
+    && GRUB_FIELD_MATCH (*pptr, grub_named_list_t, prev)   \
+    && GRUB_FIELD_MATCH (*pptr, grub_named_list_t, name))? \
+   (grub_named_list_t *) (void *) pptr : (grub_named_list_t *) grub_bad_type_cast ())
+
+#endif /* ! GRUB_LIST_HEADER */