# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxx>
# Date 1308845933 -3600
# Node ID 273be439b67afbeefdf00e68efb5b09412a25c82
# Parent 2b91546fb417458d3fa29da85aed44bddb91854f
libxl: IDL: add helper to generate references to Aggregate type members.
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
diff -r 2b91546fb417 -r 273be439b67a tools/libxl/gentypes.py
--- a/tools/libxl/gentypes.py Thu Jun 23 17:18:48 2011 +0100
+++ b/tools/libxl/gentypes.py Thu Jun 23 17:18:53 2011 +0100
@@ -76,27 +76,21 @@ def libxl_C_type_define(ty, indent = "")
return s.replace("\n", "\n%s" % indent)
def libxl_C_type_destroy(ty, v, indent = " ", parent = None):
- if parent is None:
- deref = v + "->"
- else:
- deref = v + "."
s = ""
if isinstance(ty, libxltypes.KeyedUnion):
if parent is None:
raise Exception("KeyedUnion type must have a parent")
for f in ty.fields:
+ (nparent,fexpr) = ty.member(v, f, parent is None)
keyvar_expr = f.keyvar_expr % (parent + ty.keyvar_name)
s += "if (" + keyvar_expr + ") {\n"
- s += libxl_C_type_destroy(f.type, deref + f.name, indent + " ",
deref)
+ s += libxl_C_type_destroy(f.type, fexpr, indent + " ", nparent)
s += "}\n"
elif isinstance(ty, libxltypes.Struct) and (parent is None or
ty.destructor_fn is None):
for f in [f for f in ty.fields if not f.const]:
-
- if f.name is None: # Anonymous struct
- s += libxl_C_type_destroy(f.type, deref, "", deref)
- else:
- s += libxl_C_type_destroy(f.type, deref + f.name, "", deref)
+ (nparent,fexpr) = ty.member(v, f, parent is None)
+ s += libxl_C_type_destroy(f.type, fexpr, "", nparent)
else:
if ty.destructor_fn is not None:
s += "%s(%s);\n" % (ty.destructor_fn, ty.pass_arg(v, parent is
None))
diff -r 2b91546fb417 -r 273be439b67a tools/libxl/libxltypes.py
--- a/tools/libxl/libxltypes.py Thu Jun 23 17:18:48 2011 +0100
+++ b/tools/libxl/libxltypes.py Thu Jun 23 17:18:53 2011 +0100
@@ -147,6 +147,24 @@ class Aggregate(Type):
n,t,const,comment = f
self.fields.append(Field(t,n,const=const,comment=comment))
+ # Returns a tuple (stem, field-expr)
+ #
+ # field-expr is a C expression for a field "f" within the struct
+ # "v".
+ #
+ # stem is the stem common to both "f" and any other sibbling field
+ # within the "v".
+ def member(self, v, f, isref):
+ if isref:
+ deref = v + "->"
+ else:
+ deref = v + "."
+
+ if f.name is None: # Anonymous
+ return (deref, deref)
+ else:
+ return (deref, deref + f.name)
+
class Struct(Aggregate):
def __init__(self, name, fields, **kwargs):
kwargs.setdefault('passby', PASS_BY_REFERENCE)
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