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# =============================================================================
# ____ _ _ ____ _ _ _ _ _ _ _
# _ __ _ _ / ___| | | | _ \| | | (_) |__ __ _| |__ __| | |
# | '_ \| | | | | _| |_| | | | | | | | | '_ \ / _` | '_ \ / _` | |
# | |_) | |_| | |_| | _ | |_| | |___ _| | | |_) | (_| | | | | (_| | |
# | .__/ \__, |\____|_| |_|____/|_____(_)_|_|_.__/ \__, |_| |_|\__,_|_|
# |_| |___/ |___/
# =============================================================================
# Authors: Tristan Gingold
# Patrick Lehmann
#
# Package module: Python binding and low-level API for shared library 'libghdl'.
#
# License:
# ============================================================================
# Copyright (C) 2019-2021 Tristan Gingold
#
# GHDL 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, or (at your option) any later
# version.
#
# GHDL 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 GHDL; see the file COPYING. If not, write to the Free
# Software Foundation, 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
#
# SPDX-License-Identifier: GPL-2.0-or-later
# ============================================================================
#
from ctypes import c_int32, c_bool, POINTER, Structure
from pydecor import export
from pyGHDL.libghdl import libghdl
@export
class Iterator(Structure):
_fields_ = [
("chunk", c_int32),
("chunk_idx", c_int32),
("remain", c_int32)
]
@export
def Iterate(List) -> Iterator:
"""
Create an iterator for a given list.
The idiomatic way to iterate is:
.. code-block:: Python
It = Iterate(List)
while Is_Valid(It):
El = Get_Element(It)
# ...
Next(It)
:param List: List to create an iterator from.
:return: Iterator structure.
"""
func = libghdl.vhdl__lists__iterate
func.argstype = [(c_int32)]
func.restype = Iterator
return func(List)
@export
def Is_Valid(Iterator) -> bool:
"""
Check if iterator reached the end.
:param Iterator: Iterator to check.
:return: False, if iterator has reached the end.
"""
func = libghdl.vhdl__lists__is_valid
func.argstype = [POINTER(Iterator)]
func.restype = c_bool
return func(Iterator)
@export
def Next(Iterator):
"""
Move iterator to the next element.
:param Iterator: Iterator to increment.
:return: False, if iterator has reached the end.
"""
func = libghdl.vhdl__lists__next
func.argstype = [POINTER(Iterator)]
func.restype = None
func(Iterator)
@export
def Get_Element(Iterator) -> int:
"""
Get the current element from iterator.
:param Iterator: Iterator the get the element from.
:return: The current element the iterator points to. Type: ``El_Type``
"""
func = libghdl.vhdl__lists__get_element
func.argstype = [POINTER(Iterator)]
func.restype = c_int32
return func(Iterator)
@export
def Get_Nbr_Elements(List) -> int:
"""
Return the number of elements in the list.
.. hint:: This is also 1 + the position of the last element.
:param List: The list to use.
:return: Number of list elements.
"""
func = libghdl.vhdl__lists__get_nbr_elements
func.argtype = [(c_int32)]
func.restype = c_int32
return func(List)
@export
def Create_Iir_List():
"""
Create a list.
:return: Type: ``List_Type``
"""
return libghdl.vhdl__lists__create_list()
@export
def Destroy_Iir_List(List) -> None:
"""
Destroy a list.
:param List: List to destroy.
"""
libghdl.vhdl__lists__destroy_list(List)
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