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c_client.py: Extract get_expr_field_names() 

Signed-off-by: Povilas Kanapickas <povilas@radix.lt>
This commit is contained in:
Povilas Kanapickas 2021-07-30 22:58:44 +03:00
parent 21414e7c44
commit 4d678b162b
1 changed files with 32 additions and 29 deletions
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61
src/c_client.py
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@ -649,39 +649,42 @@ def _c_helper_resolve_field_names (prefix):
return all_fields return all_fields
def get_expr_field_names(expr):
"""
returns a list of field names referenced in an expression
"""
if expr.op is None or expr.op == 'calculate_len':
if expr.lenfield_name is not None:
return [expr.lenfield_name]
# constant value expr
return []
if expr.op == '~':
return get_expr_field_names(expr.rhs)
if expr.op == 'popcount':
return get_expr_field_names(expr.rhs)
if expr.op == 'sumof':
# sumof expr references another list,
# we need that list's length field here
field = None
for f in expr.lenfield_parent.fields:
if f.field_name == expr.lenfield_name:
field = f
break
if field is None:
raise Exception("list field '%s' referenced by sumof not found" % expr.lenfield_name)
# referenced list + its length field
return [expr.lenfield_name] + get_expr_field_names(field.type.expr)
if expr.op == 'enumref':
return []
return get_expr_field_names(expr.lhs) + get_expr_field_names(expr.rhs)
def get_expr_fields(self): def get_expr_fields(self):
""" """
get the Fields referenced by switch or list expression get the Fields referenced by switch or list expression
""" """
def get_expr_field_names(expr):
if expr.op is None or expr.op == 'calculate_len':
if expr.lenfield_name is not None:
return [expr.lenfield_name]
else:
# constant value expr
return []
else:
if expr.op == '~':
return get_expr_field_names(expr.rhs)
elif expr.op == 'popcount':
return get_expr_field_names(expr.rhs)
elif expr.op == 'sumof':
# sumof expr references another list,
# we need that list's length field here
field = None
for f in expr.lenfield_parent.fields:
if f.field_name == expr.lenfield_name:
field = f
break
if field is None:
raise Exception("list field '%s' referenced by sumof not found" % expr.lenfield_name)
# referenced list + its length field
return [expr.lenfield_name] + get_expr_field_names(field.type.expr)
elif expr.op == 'enumref':
return []
else:
return get_expr_field_names(expr.lhs) + get_expr_field_names(expr.rhs)
# get_expr_field_names()
# resolve the field names with the parent structure(s) # resolve the field names with the parent structure(s)
unresolved_fields_names = get_expr_field_names(self.expr) unresolved_fields_names = get_expr_field_names(self.expr)