Add sphinx doc

.gitignore

@@ -1,3 +1,6 @@
+doc/_build
+doc/generated
+doc/source/reference/generated/
 .DS_Store*
 MANIFEST
 dist/
@@ -12,3 +15,4 @@ build.log
 *~
 setup.cfg
 _skbuild
+

doc/Makefile

@@ -0,0 +1,20 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS    ?=
+SPHINXBUILD   ?= sphinx-build
+SOURCEDIR     = source
+BUILDDIR      = build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

doc/make.bat

@@ -0,0 +1,35 @@
+@ECHO OFF
+
+pushd %~dp0
+
+REM Command file for Sphinx documentation
+
+if "%SPHINXBUILD%" == "" (
+	set SPHINXBUILD=sphinx-build
+)
+set SOURCEDIR=source
+set BUILDDIR=build
+
+%SPHINXBUILD% >NUL 2>NUL
+if errorlevel 9009 (
+	echo.
+	echo.The 'sphinx-build' command was not found. Make sure you have Sphinx
+	echo.installed, then set the SPHINXBUILD environment variable to point
+	echo.to the full path of the 'sphinx-build' executable. Alternatively you
+	echo.may add the Sphinx directory to PATH.
+	echo.
+	echo.If you don't have Sphinx installed, grab it from
+	echo.https://www.sphinx-doc.org/
+	exit /b 1
+)
+
+if "%1" == "" goto help
+
+%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+goto end
+
+:help
+%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+
+:end
+popd

doc/requirements.txt

@@ -0,0 +1,13 @@
+sphinx>=7.2.6
+sphinx-copybutton
+numpy
+scipy
+pandas
+matplotlib
+matplotlib_venn
+sphinx_rtd_theme>=2.0.0
+numpydoc
+ipykernel
+nbsphinx
+docutils
+#docutils==0.16 # pin until sphinx_rtd_theme is compatible with 0.17 or later

doc/source/conf.py

@@ -0,0 +1,50 @@
+# Configuration file for the Sphinx documentation builder.
+#
+# For the full list of built-in configuration values, see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+# -- Project information -----------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
+import os
+import sys
+sys.path.insert(0, os.path.abspath('../slycot'))
+
+master_doc = "index"
+from datetime import date
+project = 'Slycot'
+copyright = f'{date.today().year}, Slycot Developers'
+author = 'Slycot Developers'
+
+# Version information - read from the source code
+import re
+
+# Get the version number for this commmit (including alpha/beta/rc tags)
+release = re.sub('^v', '', os.popen('git describe --tags').read().strip())
+
+# The short X.Y.Z version
+version = re.sub(r'(\d+\.\d+\.\d+(.post\d+)?)(.*)', r'\1', release)
+
+print("version %s, release %s" % (version, release))
+
+# -- General configuration ---------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
+
+extensions = [
+    'sphinx.ext.autodoc', 'sphinx.ext.todo', 'sphinx.ext.napoleon',
+    'sphinx.ext.intersphinx', 'sphinx.ext.imgmath',
+    'sphinx.ext.autosummary', 'nbsphinx', 'numpydoc',
+    'sphinx.ext.doctest',  'sphinx_copybutton'
+]
+# scan documents for autosummary directives and generate stub pages for each.
+autosummary_generate = True
+
+templates_path = ['_templates']
+exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
+
+
+
+# -- Options for HTML output -------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
+
+html_theme = 'sphinx_rtd_theme'
+html_static_path = ['_static']

doc/source/contributing/index.rst

@@ -0,0 +1,30 @@
+.. this page is referenced from the front page but it's unnecessary as a navigation section for now.
+
+:orphan:
+
+Contributing to Slycot
+======================
+
+Development process and tools
+-----------------------------
+
+The development process is currently described on the `slycot github repo <https://github.com/python-control/Slycot>`_ and the `slycot github wiki <https://github.com/python-control/Slycot/wiki>`_.
+You should be familiar with following topics:
+
+- `git <https://git-scm.com/>`_
+- `github <https://skills.github.com/>`_
+- `Sphinx <https://www.sphinx-doc.org/en/master/index.html>`_
+- `reStructuredText <https://www.sphinx-doc.org/en/master/usage/restructuredtext/index.html>`_
+- `numpydoc <https://numpydoc.readthedocs.io/en/latest/>`_
+- `f2py <https://numpy.org/devdocs/f2py/index.html>`_
+
+numpydoc
+--------
+
+Slycot uses numpydoc for the docstring style in order to provide support the Numpy docstring format in sphinx,
+`see numpydoc example <https://numpydoc.readthedocs.io/en/latest/example.html>`_.
+
+F2PY
+----
+
+Slycot heavily relias on `F2PY <https://numpy.org/devdocs/f2py/index.html>`_, which is currently a part of `NumPy <http://www.numpy.org>`_.

doc/source/explanation/index.rst

@@ -0,0 +1,12 @@
+.. this page is referenced from the front page but it's unnecessary as a navigation section for now.
+
+:orphan:
+
+Inspect
+=======
+
+.. toctree::
+   :maxdepth: 1
+
+   inspect_slycot
+   inspect_slicot_slycot