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codegen: Do some checks on attributes

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Verify that the attribute is known. This could help for instance to
avoid some future typo mistakes.
We also now have a list of attributes that we can comment for
documentation purpose.

Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
This commit is contained in:
Frediano Ziglio 2015-07-21 17:45:37 +01:00 committed by Christophe Fergeau
parent 179928fceb
commit eff8b1a0e4
1 changed files with 72 additions and 0 deletions
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72
python_modules/ptypes.py
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@ -62,11 +62,79 @@ class FixedSize:
# other members
propagated_attributes=["ptr_array", "nonnull", "chunk"]
valid_attributes={
# embedded/appended at the end of the structure
'end',
# the C structure contains a pointer to data
# for instance we want to write an array to an allocated array
'to_ptr',
# write output to this C structure
'ctype',
# prefix for flags/values enumerations
'prefix',
# used in demarshaller to use directly data from message without a copy
'nocopy',
# store member array in a pointer
# similar to to_ptr but has an additional argument which is the name of a C
# field which will store the array length
'as_ptr',
# do not generate marshall code
# used for last members to be able to marshall them manually
'nomarshal',
# ??? not used by python code
'zero_terminated',
'marshall',
# this pointer member cannot be null
'nonnull',
# this flag member contains only a single flag
'unique_flag',
'ptr_array',
'outvar',
# C structure has an anonymous member (used in switch)
'anon',
'chunk',
# this channel is contained in an #ifdef section
# the argument specifies the preprocessor define to check
'ifdef',
# write this member as zero on network
'zero',
# specify minor version required for these members
'minor',
# this member contains the byte count for an array.
# the argument is the member name for item count (not bytes)
'bytes_count',
# this attribute does not exist on the network, fill just structure with the value
'virtual',
# for a switch this indicates that on network
# it will occupy always the same size (maximum size required for all members)
'fixedsize',
# use 32 bit pointer
'ptr32',
}
attributes_with_arguments={
'ctype',
'prefix',
'as_ptr',
'outvar',
'ifdef',
'minor',
'bytes_count',
'virtual',
}
def fix_attributes(attribute_list):
attrs = {}
for attr in attribute_list:
name = attr[0][1:]
lst = attr[1:]
if not name in valid_attributes:
raise Exception("Attribute %s not recognized" % name)
if not name in attributes_with_arguments:
if len(lst) > 0:
raise Exception("Attribute %s specified with options" % name)
elif len(lst) > 1:
raise Exception("Attribute %s has more than 1 argument" % name)
attrs[name] = lst
return attrs
@ -139,6 +207,8 @@ class Type:
_types_by_name[self.name] = self
def has_attr(self, name):
if not name in valid_attributes:
raise Exception('attribute %s not expected' % name)
return name in self.attributes
class TypeRef(Type):
@ -522,6 +592,8 @@ class Containee:
return not self.is_switch() and self.member_type.is_primitive()
def has_attr(self, name):
if not name in valid_attributes:
raise Exception('attribute %s not expected' % name)
return name in self.attributes
def has_minor_attr(self):