forked from OSchip/llvm-project
56 lines
2.2 KiB
Python
56 lines
2.2 KiB
Python
class StdVectorSynthProvider:
|
|
|
|
def __init__(self, valobj, dict):
|
|
self.valobj = valobj;
|
|
self.update()
|
|
|
|
def num_children(self):
|
|
start_val = self.start.GetValueAsUnsigned(0)
|
|
finish_val = self.finish.GetValueAsUnsigned(0)
|
|
end_val = self.end.GetValueAsUnsigned(0)
|
|
# Before a vector has been constructed, it will contain bad values
|
|
# so we really need to be careful about the length we return since
|
|
# unitialized data can cause us to return a huge number. We need
|
|
# to also check for any of the start, finish or end of storage values
|
|
# being zero (NULL). If any are, then this vector has not been
|
|
# initialized yet and we should return zero
|
|
|
|
# Make sure nothing is NULL
|
|
if start_val == 0 or finish_val == 0 or end_val == 0:
|
|
return 0
|
|
# Make sure start is less than finish
|
|
if start_val >= finish_val:
|
|
return 0
|
|
# Make sure finish is less than or equal to end of storage
|
|
if finish_val > end_val:
|
|
return 0
|
|
|
|
# We might still get things wrong, so cap things at 256 items for now
|
|
# TODO: read a target "settings set" variable for this to allow it to
|
|
# be customized
|
|
num_children = (finish_val-start_val)/self.data_size
|
|
if num_children > 256:
|
|
return 256
|
|
return num_children
|
|
|
|
def get_child_index(self,name):
|
|
if name == "len":
|
|
return self.num_children();
|
|
else:
|
|
return int(name.lstrip('[').rstrip(']'))
|
|
|
|
def get_child_at_index(self,index):
|
|
if index == self.num_children():
|
|
return self.valobj.CreateValueFromExpression("len",str(self.num_children()))
|
|
else:
|
|
offset = index * self.data_size
|
|
return self.start.CreateChildAtOffset('['+str(index)+']',offset,self.data_type)
|
|
|
|
def update(self):
|
|
impl = self.valobj.GetChildMemberWithName('_M_impl')
|
|
self.start = impl.GetChildMemberWithName('_M_start')
|
|
self.finish = impl.GetChildMemberWithName('_M_finish')
|
|
self.end = impl.GetChildMemberWithName('_M_end_of_storage')
|
|
self.data_type = self.start.GetType().GetPointeeType()
|
|
self.data_size = self.data_type.GetByteSize()
|