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# =============================================================================
# ____ _ _ ____ _ _
# _ __ _ _ / ___| | | | _ \| | __| | ___ _ __ ___
# | '_ \| | | | | _| |_| | | | | | / _` |/ _ \| '_ ` _ \
# | |_) | |_| | |_| | _ | |_| | |___ | (_| | (_) | | | | | |
# | .__/ \__, |\____|_| |_|____/|_____(_)__,_|\___/|_| |_| |_|
# |_| |___/
# =============================================================================
# Authors:
# Patrick Lehmann
#
# Package module: DOM: Interface items (e.g. generic or port)
#
# License:
# ============================================================================
# Copyright (C) 2019-2021 Tristan Gingold
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <gnu.org/licenses>.
#
# SPDX-License-Identifier: GPL-2.0-or-later
# ============================================================================
from typing import List
from pydecor import export
from pyVHDLModel.VHDLModel import Constraint, Direction, Expression, SubTypeOrSymbol
from pyGHDL.libghdl import utils
from pyGHDL.libghdl.utils import flist_iter
from pyGHDL.libghdl.vhdl import nodes
from pyGHDL.dom._Utils import NodeToName, GetIirKindOfNode
from pyGHDL.dom.Common import DOMException
from pyGHDL.dom.Range import Range, RangeExpression
from pyGHDL.dom.Symbol import (
SimpleObjectSymbol,
SimpleSubTypeSymbol,
ConstrainedSubTypeSymbol,
)
from pyGHDL.dom.Literal import IntegerLiteral, CharacterLiteral, FloatingPointLiteral
from pyGHDL.dom.Expression import (
SubtractionExpression,
AdditionExpression,
MultiplyExpression,
DivisionExpression,
InverseExpression,
ExponentiationExpression,
Aggregate,
)
__all__ = []
@export
def GetSubtypeIndicationFromNode(node, entity: str, name: str) -> SubTypeOrSymbol:
subTypeIndication = nodes.Get_Subtype_Indication(node)
if subTypeIndication is nodes.Null_Iir:
return None
subTypeKind = GetIirKindOfNode(subTypeIndication)
if subTypeKind == nodes.Iir_Kind.Simple_Name:
subTypeName = NodeToName(subTypeIndication)
subType = SimpleSubTypeSymbol(subTypeName)
elif subTypeKind == nodes.Iir_Kind.Array_Subtype_Definition:
typeMark = nodes.Get_Subtype_Type_Mark(subTypeIndication)
typeMarkName = NodeToName(typeMark)
constraints = GetArrayConstraintsFromSubtypeIndication(subTypeIndication)
subType = ConstrainedSubTypeSymbol(typeMarkName, constraints)
elif subTypeKind == nodes.Iir_Kind.Subtype_Definition:
raise DOMException(
"Unknown handling of subtype kind '{kind}' of subtype indication '{indication}' while parsing {entity} '{name}'.".format(
kind=subTypeKind, indication=subTypeIndication, entity=entity, name=name
)
)
else:
raise DOMException(
"Unknown subtype kind '{kind}' of subtype indication '{indication}' while parsing {entity} '{name}'.".format(
kind=subTypeKind, indication=subTypeIndication, entity=entity, name=name
)
)
return subType
@export
def GetArrayConstraintsFromSubtypeIndication(subTypeIndication) -> List[Constraint]:
constraints = []
for constraint in flist_iter(nodes.Get_Index_Constraint_List(subTypeIndication)):
constraintKind = GetIirKindOfNode(constraint)
if constraintKind == nodes.Iir_Kind.Range_Expression:
direction = nodes.Get_Direction(constraint)
leftBound = nodes.Get_Left_Limit_Expr(constraint)
rightBound = nodes.Get_Right_Limit_Expr(constraint)
r = Range(
GetExpressionFromNode(leftBound),
GetExpressionFromNode(rightBound),
Direction.DownTo if direction else Direction.To,
)
constraints.append(RangeExpression(r))
elif constraintKind == nodes.Iir_Kind.Attribute_Name:
raise DOMException("[NOT IMPLEMENTED] Attribute name as range.")
elif constraintKind == nodes.Iir_Kind.Simple_Name:
raise DOMException("[NOT IMPLEMENTED] Subtype as range.")
else:
raise DOMException(
"Unknown constraint kind '{kind}' for constraint '{constraint}' in subtype indication '{indication}'.".format(
kind=constraintKind,
constraint=constraint,
indication=subTypeIndication,
)
)
return constraints
__EXPRESSION_TRANSLATION = {
nodes.Iir_Kind.Simple_Name: SimpleObjectSymbol,
nodes.Iir_Kind.Integer_Literal: IntegerLiteral,
nodes.Iir_Kind.Floating_Point_Literal: FloatingPointLiteral,
nodes.Iir_Kind.Character_Literal: CharacterLiteral,
nodes.Iir_Kind.Negation_Operator: InverseExpression,
nodes.Iir_Kind.Addition_Operator: AdditionExpression,
nodes.Iir_Kind.Substraction_Operator: SubtractionExpression,
nodes.Iir_Kind.Multiplication_Operator: MultiplyExpression,
nodes.Iir_Kind.Division_Operator: DivisionExpression,
nodes.Iir_Kind.Exponentiation_Operator: ExponentiationExpression,
nodes.Iir_Kind.Aggregate: Aggregate,
}
@export
def GetExpressionFromNode(node) -> Expression:
kind = GetIirKindOfNode(node)
try:
cls = __EXPRESSION_TRANSLATION[kind]
except KeyError:
raise DOMException(
"Unknown expression kind '{kindName}'({kind}) in expression '{expr}'.".format(
kind=kind, kindName=kind.name, expr=node
)
)
return cls.parse(node)
# FIXME: rewrite to generator
@export
def GetGenericsFromChainedNodes(nodeChain):
result = []
for generic in utils.chain_iter(nodeChain):
kind = GetIirKindOfNode(generic)
if kind == nodes.Iir_Kind.Interface_Constant_Declaration:
from pyGHDL.dom.InterfaceItem import GenericConstantInterfaceItem
genericConstant = GenericConstantInterfaceItem.parse(generic)
result.append(genericConstant)
else:
raise DOMException(
"Unknown generic kind '{kindName}'({kind}) in generic '{generic}'.".format(
kind=kind, kindName=kind.name, generic=generic
)
)
return result
# FIXME: rewrite to generator
@export
def GetPortsFromChainedNodes(nodeChain):
result = []
for port in utils.chain_iter(nodeChain):
kind = GetIirKindOfNode(port)
if kind == nodes.Iir_Kind.Interface_Signal_Declaration:
from pyGHDL.dom.InterfaceItem import PortSignalInterfaceItem
portSignal = PortSignalInterfaceItem.parse(port)
result.append(portSignal)
else:
raise DOMException(
"Unknown port kind '{kindName}'({kind}) in port '{port}'.".format(
kind=kind, kindName=kind.name, port=port
)
)
return result
def GetDeclaredItemsFromChainedNodes(nodeChain, entity: str, name: str):
result = []
for item in utils.chain_iter(nodeChain):
kind = GetIirKindOfNode(item)
if kind == nodes.Iir_Kind.Constant_Declaration:
from pyGHDL.dom.Object import Constant
result.append(Constant.parse(item))
elif kind == nodes.Iir_Kind.Signal_Declaration:
from pyGHDL.dom.Object import Signal
result.append(Signal.parse(item))
elif kind == nodes.Iir_Kind.Anonymous_Type_Declaration:
typeName = NodeToName(item)
print("found type '{name}'".format(name=typeName))
elif kind == nodes.Iir_Kind.Subtype_Declaration:
subTypeName = NodeToName(item)
print("found subtype '{name}'".format(name=subTypeName))
elif kind == nodes.Iir_Kind.Function_Declaration:
functionName = NodeToName(item)
print("found function '{name}'".format(name=functionName))
elif kind == nodes.Iir_Kind.Function_Body:
# functionName = NodeToName(item)
print("found function body '{name}'".format(name="????"))
elif kind == nodes.Iir_Kind.Object_Alias_Declaration:
aliasName = NodeToName(item)
print("found alias '{name}'".format(name=aliasName))
else:
raise DOMException(
"Unknown declared item kind '{kindName}'({kind}) in {entity} '{name}'.".format(
kind=kind, kindName=kind.name, entity=entity, name=name
)
)
return result
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