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from libghdl import libghdl
from ctypes import (c_char_p, c_int32, c_int, c_bool, sizeof, c_void_p)
import libghdl.iirs as iirs
import libghdl.thin as thin
import libghdl.nodes_meta as nodes_meta
from libghdl.nodes_meta import (Attr, types)
# from libghdl_defs import (fields, Iir_Kind, types, Attr)
Null_Iir = 0
Null_Iir_List = 0
def _build_enum_image(cls):
d = [e for e in dir(cls) if e[0] != '_']
res = [None] * len(d)
for e in d:
res[getattr(cls, e)] = e
return res
_fields_image = _build_enum_image(nodes_meta.fields)
def fields_image(idx):
"""String representation of field idx"""
return _fields_image[idx]
_kind_image = _build_enum_image(iirs.Iir_Kind)
def kind_image(k):
"""String representation of Iir_Kind k"""
return _kind_image[k]
_types_image = _build_enum_image(nodes_meta.types)
def types_image(t):
"""String representation of Nodes_Meta.Types t"""
return _types_image[t]
_attr_image = _build_enum_image(nodes_meta.Attr)
def attr_image(a):
"""String representation of Nodes_Meta.Attr a"""
return _attr_image[a]
def fields_iter(n):
"""Iterate on fields of node n"""
if n == Null_Iir:
return
k = iirs.Get_Kind(n)
first = nodes_meta.get_fields_first(k)
last = nodes_meta.get_fields_last(k)
for i in range(first, last + 1):
yield nodes_meta.get_field_by_index(i)
def chain_iter(n):
"""Iterate of a chain headed by node n"""
while n != Null_Iir:
yield n
n = iirs.Get_Chain(n)
def chain_to_list(n):
"""Convert a chain headed by node n to a python list"""
return [e for e in chain_iter(n)]
def nodes_iter(n):
"""Iterate of all nodes of n, including n.
Nodes are returned only once."""
if n == Null_Iir:
return
# print 'nodes_iter for {0}'.format(n)
yield n
for f in fields_iter(n):
typ = nodes_meta.get_field_type(f)
# print ' {0}: field {1} (type: {2})'.format(
# n, fields_image(f), types_image(typ))
if typ == nodes_meta.types.Iir:
attr = nodes_meta.get_field_attribute(f)
if attr == Attr.ANone:
for n1 in nodes_iter(nodes_meta.Get_Iir(n, f)):
yield n1
elif attr == Attr.Chain:
n2 = nodes_meta.Get_Iir(n, f)
while n2 != Null_Iir:
for n1 in nodes_iter(n2):
yield n1
n2 = iirs.Get_Chain(n2)
elif attr == Attr.Maybe_Ref:
if not iirs.Get_Is_Ref(n, f):
for n1 in nodes_iter(nodes_meta.Get_Iir(n, f)):
yield n1
elif typ == types.Iir_List:
attr = nodes_meta.get_field_attribute(f)
if attr == Attr.ANone:
for n1 in list_iter(nodes_meta.Get_Iir_List(n, f)):
for n2 in nodes_iter(n1):
yield n2
def list_iter(lst):
"""Iterate of all element of Iir_List lst."""
if lst <= thin.Iir_List_All:
return
for i in range(thin.Get_Nbr_Elements(lst)):
yield thin.Get_Nth_Element(lst, i)
def declarations_iter(n):
"""Iterator on all declarations in n."""
k = iirs.Get_Kind(n)
if nodes_meta.Has_Generic_Chain(k):
for n1 in chain_iter(iirs.Get_Generic_Chain(n)):
yield n1
if nodes_meta.Has_Port_Chain(k):
for n1 in chain_iter(iirs.Get_Port_Chain(n)):
yield n1
if nodes_meta.Has_Interface_Declaration_Chain(k):
for n1 in chain_iter(iirs.Get_Interface_Declaration_Chain(n)):
yield n1
if nodes_meta.Has_Declaration_Chain(k):
for n1 in chain_iter(iirs.Get_Declaration_Chain(n)):
k1 = iirs.Get_Kind(n1)
if k1 not in iirs.Iir_Kinds.Specification \
and k1 != iirs.Iir_Kind.Use_Clause:
yield n1
# There can be nested declarations (subprograms,
# record elements)
for n2 in declarations_iter(n1):
yield n2
if nodes_meta.Has_Concurrent_Statement_Chain(k):
for n1 in chain_iter(iirs.Get_Concurrent_Statement_Chain(n)):
for n2 in declarations_iter(n1):
yield n2
if nodes_meta.Has_Sequential_Statement_Chain(k):
for n1 in chain_iter(iirs.Get_Sequential_Statement_Chain(n)):
for n2 in declarations_iter(n1):
yield n2
if nodes_meta.Has_Parameter_Specification(k):
yield iirs.Get_Parameter_Specification(n)
if nodes_meta.Has_Generate_Statement_Body(k):
for n1 in declarations_iter(iirs.Get_Generate_Statement_Body(n)):
yield n1
if nodes_meta.Has_Else_Clause(k):
n1 = iirs.Get_Else_Clause(n)
if n1 != Null_Iir:
for n2 in declarations_iter(n1):
yield n2
if nodes_meta.Has_Generate_Else_Clause(k):
n1 = iirs.Get_Generate_Else_Clause(n)
if n1 != Null_Iir:
for n2 in declarations_iter(n1):
yield n2
if nodes_meta.Has_Block_Header(k):
n1 = iirs.Get_Block_Header(n)
if n1 != Null_Iir:
for n2 in declarations_iter(n1):
yield n2
if k in [iirs.Iir_Kind.Entity_Declaration,
iirs.Iir_Kind.Architecture_Body,
iirs.Iir_Kind.Package_Body,
iirs.Iir_Kind.Process_Statement,
iirs.Iir_Kind.Sensitized_Process_Statement,
iirs.Iir_Kind.Concurrent_Assertion_Statement,
iirs.Iir_Kind.Concurrent_Simple_Signal_Assignment,
iirs.Iir_Kind.Concurrent_Selected_Signal_Assignment,
iirs.Iir_Kind.Concurrent_Conditional_Signal_Assignment,
iirs.Iir_Kind.Concurrent_Procedure_Call_Statement,
iirs.Iir_Kind.Block_Statement,
iirs.Iir_Kind.Block_Header,
iirs.Iir_Kind.For_Generate_Statement,
iirs.Iir_Kind.If_Generate_Statement,
iirs.Iir_Kind.Generate_Statement_Body,
iirs.Iir_Kind.Assertion_Statement,
iirs.Iir_Kind.Wait_Statement,
iirs.Iir_Kind.Simple_Signal_Assignment_Statement,
iirs.Iir_Kind.Variable_Assignment_Statement,
iirs.Iir_Kind.For_Loop_Statement,
iirs.Iir_Kind.While_Loop_Statement,
iirs.Iir_Kind.Case_Statement,
iirs.Iir_Kind.Null_Statement,
iirs.Iir_Kind.Exit_Statement,
iirs.Iir_Kind.Next_Statement,
iirs.Iir_Kind.Procedure_Call_Statement,
iirs.Iir_Kind.Signal_Declaration,
iirs.Iir_Kind.Constant_Declaration,
iirs.Iir_Kind.Variable_Declaration,
iirs.Iir_Kind.File_Declaration,
iirs.Iir_Kind.Object_Alias_Declaration,
iirs.Iir_Kind.Attribute_Declaration,
iirs.Iir_Kind.Component_Declaration,
iirs.Iir_Kind.If_Statement,
iirs.Iir_Kind.Elsif,
iirs.Iir_Kind.Return_Statement,
iirs.Iir_Kind.Type_Declaration,
iirs.Iir_Kind.Anonymous_Type_Declaration,
iirs.Iir_Kind.Subtype_Declaration,
iirs.Iir_Kind.Function_Declaration,
iirs.Iir_Kind.Function_Body,
iirs.Iir_Kind.Procedure_Declaration,
iirs.Iir_Kind.Procedure_Body,
iirs.Iir_Kind.Component_Instantiation_Statement,
]:
return
assert False, "unknown node of kind {}".format(kind_image(k))
def concurrent_stmts_iter(n):
"""Iterator on concurrent statements in n."""
k = iirs.Get_Kind(n)
if k == iirs.Iir_Kind.Design_Unit:
for n1 in concurrent_stmts_iter(iirs.Get_Library_Unit(n)):
yield n1
elif k == iirs.Iir_Kind.Entity_Declaration \
or k == iirs.Iir_Kind.Architecture_Body \
or k == iirs.Iir_Kind.Block_Statement:
for n1 in chain_iter(iirs.Get_Concurrent_Statement_Chain(n)):
yield n1
for n2 in concurrent_stmts_iter(n1):
yield n2
elif k == iirs.Iir_Kind.For_Generate_Statement:
for n1 in concurrent_stmts_iter(iirs.Get_Generate_Statement_Body(n)):
yield n1
elif k == iirs.Iir_Kind.If_Generate_Statement:
while n != Null_Iir:
for n1 in concurrent_stmts_iter(
iirs.Get_Generate_Statement_Body(n)):
yield n1
n = iirs.Get_Generate_Else_Clause(n)
elif k == iirs.Iir_Kind.Case_Generate_Statement:
alt = iirs.Get_Case_Statement_Alternative_Chain(n)
for n1 in chain_iter(alt):
blk = iirs.Get_Associated_Block(n1)
if blk != Null_Iir:
for n2 in concurrent_stmts_iter(
iirs.Get_Generate_Statement_Body(n)):
yield n2
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