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Code Issues Wiki Activity

Also backup members inside unions,

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the code is a bit more complicated since unions can have structs or simple types.
This commit is contained in:
Arne Schwabe 2016-03-25 14:04:30 +01:00
parent ecff71b044
commit dd76e9d8bf
2 changed files with 66 additions and 16 deletions
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71
radio/util/generate_datacopy.py
View file

@ -12,33 +12,74 @@ if sys.platform == "darwin":
structs = []
extrastructs = []
def build_struct(cursor, anonymousUnion=False):
if not anonymousUnion:
structs.append(cursor.spelling)
print("template <class A, class B>\nvoid copy%s(A * dest, B * src)\n{" % cursor.spelling)
def build_struct(cursor):
structs.append(cursor.spelling)
print("template <class A, class B>\nvoid copy%s(A * dest, B * src)\n{" % cursor.spelling)
for c in cursor.get_children():
if c.kind == clang.cindex.CursorKind.FIELD_DECL:
if c.type.get_array_size() > 0:
if c.type.get_array_element_type().spelling in structs:
print(" for (int i=0; i<%d; i++) {" % c.type.get_array_size())
print(" copy%s(&dest->%s[i], &src->%s[i]);" % (c.type.get_array_element_type().spelling, c.spelling, c.spelling))
print(" }")
if c.kind == clang.cindex.CursorKind.UNION_DECL:
if c.spelling:
raise "Cannot handle non anonymous unions"
copiedUnionMember = False
for uc in c.get_children():
if not uc.spelling or uc.kind == clang.cindex.CursorKind.PACKED_ATTR:
# Ignore
pass
else:
print(" memcpy(dest->%s, src->%s, sizeof(dest->%s));" % (c.spelling, c.spelling, c.spelling))
elif c.type.get_declaration().spelling in structs:
print(" copy%s(&dest->%s, &src->%s);" % (c.type.get_declaration().spelling, c.spelling, c.spelling))
else:
print(" dest->%s = src->%s;" % (c.spelling, c.spelling))
print("}\n")
# per default we copy only the first member of a union and warn if there are more
# members (declare the other members NOBACKUP)
if copiedUnionMember:
print ("Warning more than one union member (%s) in anynomous union inside struct %s, consider NOBACKUP statements" % (uc.spelling, cursor.spelling), file=sys.stderr)
else:
copy_decl(uc, uc.spelling)
copiedUnionMember = True
elif c.kind == clang.cindex.CursorKind.FIELD_DECL:
copy_decl(c, c.spelling)
if not anonymousUnion:
print("}\n")
def build(cursor):
result = []
for c in cursor.get_children():
if c.kind == clang.cindex.CursorKind.STRUCT_DECL:
build_struct(c)
for c, spelling in extrastructs:
print("template <class A, class B>\nvoid copy%s(A * dest, B * src)\n{" % spelling)
build_struct(c, True)
print ("}\n")
return result
def copy_decl(c, spelling):
childs = [ch for ch in c.get_children()]
if c.type.get_array_size() > 0:
if c.type.get_array_element_type().spelling in structs:
print(" for (int i=0; i<%d; i++) {" % c.type.get_array_size())
print(" copy%s(&dest->%s[i], &src->%s[i]);" % (c.type.get_array_element_type().spelling, spelling, spelling))
print(" }")
else:
print(" memcpy(dest->%s, src->%s, sizeof(dest->%s));" % (spelling, spelling, spelling))
elif c.type.kind == clang.cindex.TypeKind.UNEXPOSED and len(childs)==1 and childs[0].kind == clang.cindex.CursorKind.STRUCT_DECL:
# inline declared structs
spelling = c.semantic_parent.semantic_parent.spelling + "_" + spelling
extrastructs.append((childs[0], spelling))
print(" copy%s(&dest->%s, &src->%s);" % (spelling, spelling, spelling))
elif c.type.get_declaration().spelling in structs:
print(" copy%s(&dest->%s, &src->%s);" % (c.type.get_declaration().spelling, spelling, spelling))
else:
print(" dest->%s = src->%s;" % (spelling, spelling))
def header():
print("//This file was auto-generated by %s script on %s. Do not edit this file!\n\n\n" % (os.path.basename(sys.argv[0]), time.asctime()))