win32: ash: macros for implementing simple foo_size, foo_copy

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/shell/ash.c b/shell/ash.c
index 1326182fe..afe443518 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -13280,6 +13280,41 @@ int ash_main(int argc UNUSED_PARAM, char **argv)
         /* NOTREACHED */
 }
 
+/*
+ * forkshell_prepare() and friends
+ */
+#define SLIST_SIZE_BEGIN(name,type) \
+static void \
+name(type *p) \
+{ \
+        while (p) { \
+                funcblock = (char *) funcblock + sizeof(type);
+                /* do something here with p */
+#define SLIST_SIZE_END() \
+                nodeptrsize++; \
+                p = p->next; \
+        } \
+}
+
+#define SLIST_COPY_BEGIN(name,type) \
+static type * \
+name(type *vp) \
+{ \
+        type *start; \
+        type **vpp; \
+        vpp = &start; \
+        while (vp) { \
+                *vpp = funcblock; \
+                funcblock = (char *) funcblock + sizeof(type);
+                /* do something here with vpp and vp */
+#define SLIST_COPY_END() \
+                SAVE_PTR((*vpp)->next); \
+                vp = vp->next; \
+                vpp = &(*vpp)->next; \
+        } \
+        *vpp = NULL; \
+        return start; \
+}
 
 /*-
  * Copyright (c) 1989, 1991, 1993, 1994