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# =============================================================================
# ____ _ _ ____ _ _ _ _ _ _ _
# _ __ _ _ / ___| | | | _ \| | | (_) |__ __ _| |__ __| | |
# | '_ \| | | | | _| |_| | | | | | | | | '_ \ / _` | '_ \ / _` | |
# | |_) | |_| | |_| | _ | |_| | |___ _| | | |_) | (_| | | | | (_| | |
# | .__/ \__, |\____|_| |_|____/|_____(_)_|_|_.__/ \__, |_| |_|\__,_|_|
# |_| |___/ |___/
# =============================================================================
# Authors: Tristan Gingold
#
# Package package: Python binding and low-level API for shared library 'libghdl'.
#
# License:
# ============================================================================
# Copyright (C) 2019-2020 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
# ============================================================================
#
import ctypes
import os
import sys
from pathlib import Path
from shutil import which
from typing import Tuple
from pydecor import export
from pyGHDL.libghdl.version import __version__
def _to_char_p(arg: bytes) -> Tuple[ctypes.c_char_p, int]:
return ctypes.c_char_p(arg), len(arg)
def _get_libghdl_name() -> Path:
"""Get the name of the libghdl library (with version and extension)"""
ver = __version__.replace("-", "_").replace(".", "_")
ext = {"win32": "dll", "cygwin": "dll", "darwin": "dylib"}.get(sys.platform, "so")
return Path("libghdl-{version}.{ext}".format(version=ver, ext=ext))
def _check_libghdl_libdir(libdir: Path, basename: Path) -> Path:
"""Returns libghdl path in :param:`libdir`, if found."""
if libdir is None:
raise ValueError("Parameter 'libdir' is None.")
# print('libghdl: check in {}'.format(libdir))
res = libdir / basename
if res.exists():
return res
raise FileNotFoundError(str(res))
def _check_libghdl_bindir(bindir: Path, basename: Path) -> Path:
if bindir is None:
raise ValueError("Parameter 'bindir' is None.")
return _check_libghdl_libdir((bindir / "../lib").resolve(), basename)
def _get_libghdl_path():
"""
Locate the directory where the shared library is installed.
Search order:
1. `GHDL_PREFIX` - directory (prefix) of the vhdl libraries.
2. `VUNIT_GHDL_PATH` - path of the `ghdl` binary when using VUnit.
3. `GHDL` - name of, or path to the `ghdl` binary.
4. Try within `libghdl/` Python installation.
5. Try when running from the build directory.
"""
basename = _get_libghdl_name()
# Try GHDL_PREFIX
# GHDL_PREFIX is the prefix of the vhdl libraries, so remove the
# last path component.
r = os.environ.get("GHDL_PREFIX")
try:
return _check_libghdl_libdir(Path(r).parent, basename)
except (TypeError, FileNotFoundError):
pass
# Try VUNIT_GHDL_PATH (path of the ghdl binary when using VUnit).
r = os.environ.get("VUNIT_GHDL_PATH")
try:
return _check_libghdl_bindir(Path(r), basename)
except (TypeError, FileNotFoundError):
pass
# Try GHDL (name/path of the ghdl binary)
r = os.environ.get("GHDL", "ghdl")
r = which(r)
try:
return _check_libghdl_bindir(Path(r).parent, basename)
except (TypeError, FileNotFoundError):
pass
# Try within libghdl/ python installation
r = Path(__file__)
try:
return _check_libghdl_bindir(r.parent, basename)
except (TypeError, FileNotFoundError):
pass
# Try when running from the build directory
r = (r.parent / "../../lib").resolve()
try:
return _check_libghdl_libdir(r, basename)
except (TypeError, FileNotFoundError):
pass
# Failed.
raise Exception("Cannot find libghdl {}".format(basename))
# Load the shared library
_libghdl_path = _get_libghdl_path()
# print("Load {}".format(_libghdl_path))
libghdl = ctypes.CDLL(str(_libghdl_path))
# Initialize it.
# First Ada elaboration (must be the first call)
libghdl.libghdl_init()
# Then 'normal' initialization (set hooks)
libghdl.libghdl__set_hooks_for_analysis()
# Set the prefix in order to locate the VHDL libraries.
libghdl.libghdl__set_exec_prefix(
*_to_char_p(str(_libghdl_path.parent.parent).encode("utf-8"))
)
@export
def finalize() -> None:
"""Free all the memory, be ready for a new initialization."""
libghdl.options__finalize()
@export
def initialize() -> None:
"""Initialize or re-initialize the shared library."""
libghdl.options__initialize()
@export
def set_option(opt: bytes) -> bool:
"""Set option :param:`opt`. Return true, if the option is known and handled."""
return libghdl.libghdl__set_option(*_to_char_p(opt)) == 0
@export
def analyze_init() -> None:
"""
Initialize the analyzer.
.. deprecated:: 1.0.0
Deprecated as it may raise an exception. Use :func:`analyze_init_status`.
"""
libghdl.libghdl__analyze_init()
@export
def analyze_init_status() -> int:
"""Initialize the analyzer. Returns 0 in case of success."""
return libghdl.libghdl__analyze_init_status()
@export
def analyze_file(fname: bytes):
""""Analyze a given filename :param:`fname`."""
return libghdl.libghdl__analyze_file(*_to_char_p(fname))
@export
def disp_config():
""""Display the configured prefixes for libghdl."""
return libghdl.ghdllocal__disp_config_prefixes()
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