1 # -*- coding: utf-8; mode: python -*-
2 # pylint: disable=W0141,C0113,C0103,C0325
7 Replacement for the sphinx c-domain.
9 :copyright: Copyright (C) 2016 Markus Heiser
10 :license: GPL Version 2, June 1991 see Linux/COPYING for details.
12 List of customizations:
14 * Moved the *duplicate C object description* warnings for function
15 declarations in the nitpicky mode. See Sphinx documentation for
16 the config values for ``nitpick`` and ``nitpick_ignore``.
18 * Add option 'name' to the "c:function:" directive. With option 'name' the
19 ref-name of a function can be modified. E.g.::
21 .. c:function:: int ioctl( int fd, int request )
22 :name: VIDIOC_LOG_STATUS
24 The func-name (e.g. ioctl) remains in the output but the ref-name changed
25 from 'ioctl' to 'VIDIOC_LOG_STATUS'. The function is referenced by::
27 * :c:func:`VIDIOC_LOG_STATUS` or
28 * :any:`VIDIOC_LOG_STATUS` (``:any:`` needs sphinx 1.3)
30 * Handle signatures of function-like macros well. Don't try to deduce
31 arguments types of function-like macros.
35 from docutils import nodes
36 from docutils.parsers.rst import directives
39 from sphinx import addnodes
40 from sphinx.domains.c import c_funcptr_sig_re, c_sig_re
41 from sphinx.domains.c import CObject as Base_CObject
42 from sphinx.domains.c import CDomain as Base_CDomain
43 from itertools import chain
49 major, minor, patch = sphinx.version_info[:3]
51 # Namespace to be prepended to the full name
55 # Handle trivial newer c domain tags that are part of Sphinx 3.1 c domain tags
56 # - Store the namespace if ".. c:namespace::" tag is found
58 RE_namespace = re.compile(r'^\s*..\s*c:namespace::\s*(\S+)\s*$')
60 def markup_namespace(match):
63 namespace = match.group(1)
68 # Handle c:macro for function-style declaration
70 RE_macro = re.compile(r'^\s*..\s*c:macro::\s*(\S+)\s+(\S.*)\s*$')
71 def markup_macro(match):
72 return ".. c:function:: " + match.group(1) + ' ' + match.group(2)
75 # Handle newer c domain tags that are evaluated as .. c:type: for
76 # backward-compatibility with Sphinx < 3.0
78 RE_ctype = re.compile(r'^\s*..\s*c:(struct|union|enum|enumerator|alias)::\s*(.*)$')
80 def markup_ctype(match):
81 return ".. c:type:: " + match.group(2)
84 # Handle newer c domain tags that are evaluated as :c:type: for
85 # backward-compatibility with Sphinx < 3.0
87 RE_ctype_refs = re.compile(r':c:(var|struct|union|enum|enumerator)::`([^\`]+)`')
88 def markup_ctype_refs(match):
89 return ":c:type:`" + match.group(2) + '`'
92 # Simply convert :c:expr: and :c:texpr: into a literal block.
94 RE_expr = re.compile(r':c:(expr|texpr):`([^\`]+)`')
95 def markup_c_expr(match):
96 return '\ ``' + match.group(2) + '``\ '
99 # Parse Sphinx 3.x C markups, replacing them by backward-compatible ones
101 def c_markups(app, docname, source):
104 RE_namespace: markup_namespace,
105 RE_expr: markup_c_expr,
106 RE_macro: markup_macro,
107 RE_ctype: markup_ctype,
108 RE_ctype_refs: markup_ctype_refs,
111 lines = iter(source[0].splitlines(True))
113 match_iterators = [regex.finditer(n) for regex in markup_func]
114 matches = sorted(chain(*match_iterators), key=lambda m: m.start())
116 n = n[:m.start()] + markup_func[m.re](m) + n[m.end():]
123 # Now implements support for the cdomain namespacing logic
128 # Handle easy Sphinx 3.1+ simple new tags: :c:expr and .. c:namespace::
129 app.connect('source-read', c_markups)
131 if (major == 1 and minor < 8):
132 app.override_domain(CDomain)
134 app.add_domain(CDomain, override=True)
137 version = __version__,
138 parallel_read_safe = True,
139 parallel_write_safe = True
142 class CObject(Base_CObject):
145 Description of a C language object.
148 "name" : directives.unchanged
151 def handle_func_like_macro(self, sig, signode):
152 u"""Handles signatures of function-like macros.
154 If the objtype is 'function' and the the signature ``sig`` is a
155 function-like macro, the name of the macro is returned. Otherwise
156 ``False`` is returned. """
160 if not self.objtype == 'function':
163 m = c_funcptr_sig_re.match(sig)
165 m = c_sig_re.match(sig)
167 raise ValueError('no match')
169 rettype, fullname, arglist, _const = m.groups()
170 arglist = arglist.strip()
171 if rettype or not arglist:
174 arglist = arglist.replace('`', '').replace('\\ ', '') # remove markup
175 arglist = [a.strip() for a in arglist.split(",")]
177 # has the first argument a type?
178 if len(arglist[0].split(" ")) > 1:
181 # This is a function-like macro, it's arguments are typeless!
182 signode += addnodes.desc_name(fullname, fullname)
183 paramlist = addnodes.desc_parameterlist()
186 for argname in arglist:
187 param = addnodes.desc_parameter('', '', noemph=True)
188 # separate by non-breaking space in the output
189 param += nodes.emphasis(argname, argname)
193 fullname = namespace + "." + fullname
197 def handle_signature(self, sig, signode):
198 """Transform a C signature into RST nodes."""
202 fullname = self.handle_func_like_macro(sig, signode)
204 fullname = super(CObject, self).handle_signature(sig, signode)
206 if "name" in self.options:
207 if self.objtype == 'function':
208 fullname = self.options["name"]
210 # FIXME: handle :name: value of other declaration types?
214 fullname = namespace + "." + fullname
218 def add_target_and_index(self, name, sig, signode):
219 # for C API items we add a prefix since names are usually not qualified
220 # by a module name and so easily clash with e.g. section titles
221 targetname = 'c.' + name
222 if targetname not in self.state.document.ids:
223 signode['names'].append(targetname)
224 signode['ids'].append(targetname)
225 signode['first'] = (not self.names)
226 self.state.document.note_explicit_target(signode)
227 inv = self.env.domaindata['c']['objects']
228 if (name in inv and self.env.config.nitpicky):
229 if self.objtype == 'function':
230 if ('c:func', name) not in self.env.config.nitpick_ignore:
231 self.state_machine.reporter.warning(
232 'duplicate C object description of %s, ' % name +
233 'other instance in ' + self.env.doc2path(inv[name][0]),
235 inv[name] = (self.env.docname, self.objtype)
237 indextext = self.get_index_text(name)
239 if major == 1 and minor < 4:
240 # indexnode's tuple changed in 1.4
241 # https://github.com/sphinx-doc/sphinx/commit/e6a5a3a92e938fcd75866b4227db9e0524d58f7c
242 self.indexnode['entries'].append(
243 ('single', indextext, targetname, ''))
245 self.indexnode['entries'].append(
246 ('single', indextext, targetname, '', None))
248 class CDomain(Base_CDomain):
250 """C language domain."""