archive/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2025-08-15 22:21:42 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions
linux/scripts/kernel-doc.py
Mauro Carvalho Chehab 01d3235dde scripts/kernel-doc.py: properly handle struct_group macros 
Handing nested parenthesis with regular expressions is not an
easy task. It is even harder with Python's re module, as it
has a limited subset of regular expressions, missing more
advanced features.

We might use instead Python regex module, but still the
regular expressions are very hard to understand. So, instead,
add a logic to properly match delimiters.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/74dee485f70b7ce85e90496bfdd360283a677a58.1744106241.git.mchehab+huawei@kernel.org
2025-04-09 12:10:33 -06:00

3075 lines
104 KiB
Python
Executable file
Raw Blame History

#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0
# Copyright(c) 2025: Mauro Carvalho Chehab <mchehab@kernel.org>.
#
# pylint: disable=R0902,R0903,R0904,R0911,R0912,R0913,R0914,R0915,R0917,R1702
# pylint: disable=C0302,C0103,C0301
# pylint: disable=C0116,C0115,W0511,W0613
#
# Converted from the kernel-doc script originally written in Perl
# under GPLv2, copyrighted since 1998 by the following authors:
#
# Aditya Srivastava <yashsri421@gmail.com>
# Akira Yokosawa <akiyks@gmail.com>
# Alexander A. Klimov <grandmaster@al2klimov.de>
# Alexander Lobakin <aleksander.lobakin@intel.com>
# André Almeida <andrealmeid@igalia.com>
# Andy Shevchenko <andriy.shevchenko@linux.intel.com>
# Anna-Maria Behnsen <anna-maria@linutronix.de>
# Armin Kuster <akuster@mvista.com>
# Bart Van Assche <bart.vanassche@sandisk.com>
# Ben Hutchings <ben@decadent.org.uk>
# Borislav Petkov <bbpetkov@yahoo.de>
# Chen-Yu Tsai <wenst@chromium.org>
# Coco Li <lixiaoyan@google.com>
# Conchúr Navid <conchur@web.de>
# Daniel Santos <daniel.santos@pobox.com>
# Danilo Cesar Lemes de Paula <danilo.cesar@collabora.co.uk>
# Dan Luedtke <mail@danrl.de>
# Donald Hunter <donald.hunter@gmail.com>
# Gabriel Krisman Bertazi <krisman@collabora.co.uk>
# Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# Harvey Harrison <harvey.harrison@gmail.com>
# Horia Geanta <horia.geanta@freescale.com>
# Ilya Dryomov <idryomov@gmail.com>
# Jakub Kicinski <kuba@kernel.org>
# Jani Nikula <jani.nikula@intel.com>
# Jason Baron <jbaron@redhat.com>
# Jason Gunthorpe <jgg@nvidia.com>
# Jérémy Bobbio <lunar@debian.org>
# Johannes Berg <johannes.berg@intel.com>
# Johannes Weiner <hannes@cmpxchg.org>
# Jonathan Cameron <Jonathan.Cameron@huawei.com>
# Jonathan Corbet <corbet@lwn.net>
# Jonathan Neuschäfer <j.neuschaefer@gmx.net>
# Kamil Rytarowski <n54@gmx.com>
# Kees Cook <kees@kernel.org>
# Laurent Pinchart <laurent.pinchart@ideasonboard.com>
# Levin, Alexander (Sasha Levin) <alexander.levin@verizon.com>
# Linus Torvalds <torvalds@linux-foundation.org>
# Lucas De Marchi <lucas.demarchi@profusion.mobi>
# Mark Rutland <mark.rutland@arm.com>
# Markus Heiser <markus.heiser@darmarit.de>
# Martin Waitz <tali@admingilde.org>
# Masahiro Yamada <masahiroy@kernel.org>
# Matthew Wilcox <willy@infradead.org>
# Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
# Michal Wajdeczko <michal.wajdeczko@intel.com>
# Michael Zucchi
# Mike Rapoport <rppt@linux.ibm.com>
# Niklas Söderlund <niklas.soderlund@corigine.com>
# Nishanth Menon <nm@ti.com>
# Paolo Bonzini <pbonzini@redhat.com>
# Pavan Kumar Linga <pavan.kumar.linga@intel.com>
# Pavel Pisa <pisa@cmp.felk.cvut.cz>
# Peter Maydell <peter.maydell@linaro.org>
# Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
# Randy Dunlap <rdunlap@infradead.org>
# Richard Kennedy <richard@rsk.demon.co.uk>
# Rich Walker <rw@shadow.org.uk>
# Rolf Eike Beer <eike-kernel@sf-tec.de>
# Sakari Ailus <sakari.ailus@linux.intel.com>
# Silvio Fricke <silvio.fricke@gmail.com>
# Simon Huggins
# Tim Waugh <twaugh@redhat.com>
# Tomasz Warniełło <tomasz.warniello@gmail.com>
# Utkarsh Tripathi <utripathi2002@gmail.com>
# valdis.kletnieks@vt.edu <valdis.kletnieks@vt.edu>
# Vegard Nossum <vegard.nossum@oracle.com>
# Will Deacon <will.deacon@arm.com>
# Yacine Belkadi <yacine.belkadi.1@gmail.com>
# Yujie Liu <yujie.liu@intel.com>
# TODO: implement warning filtering
"""
kernel_doc
==========
Print formatted kernel documentation to stdout
Read C language source or header FILEs, extract embedded
documentation comments, and print formatted documentation
to standard output.
The documentation comments are identified by the "/**"
opening comment mark.
See Documentation/doc-guide/kernel-doc.rst for the
documentation comment syntax.
"""
import argparse
import logging
import os
import re
import sys
from datetime import datetime
from pprint import pformat
from dateutil import tz
# Local cache for regular expressions
re_cache = {}
class Re:
"""
Helper class to simplify regex declaration and usage,
It calls re.compile for a given pattern. It also allows adding
regular expressions and define sub at class init time.
Regular expressions can be cached via an argument, helping to speedup
searches.
"""
def _add_regex(self, string, flags):
if string in re_cache:
self.regex = re_cache[string]
else:
self.regex = re.compile(string, flags=flags)
if self.cache:
re_cache[string] = self.regex
def __init__(self, string, cache=True, flags=0):
self.cache = cache
self.last_match = None
self._add_regex(string, flags)
def __str__(self):
return self.regex.pattern
def __add__(self, other):
return Re(str(self) + str(other), cache=self.cache or other.cache,
flags=self.regex.flags | other.regex.flags)
def match(self, string):
self.last_match = self.regex.match(string)
return self.last_match
def search(self, string):
self.last_match = self.regex.search(string)
return self.last_match
def findall(self, string):
return self.regex.findall(string)
def split(self, string):
return self.regex.split(string)
def sub(self, sub, string, count=0):
return self.regex.sub(sub, string, count=count)
def group(self, num):
return self.last_match.group(num)
class NestedMatch:
"""
Finding nested delimiters is hard with regular expressions. It is
even harder on Python with its normal re module, as there are several
advanced regular expressions that are missing.
This is the case of this pattern:
'\\bSTRUCT_GROUP(\\(((?:(?>[^)(]+)|(?1))*)\\))[^;]*;'
which is used to properly match open/close parenthesis of the
string search STRUCT_GROUP(),
Add a class that counts pairs of delimiters, using it to match and
replace nested expressions.
The original approach was suggested by:
https://stackoverflow.com/questions/5454322/python-how-to-match-nested-parentheses-with-regex
Although I re-implemented it to make it more generic and match 3 types
of delimiters. The logic checks if delimiters are paired. If not, it
will ignore the search string.
"""
# TODO:
# Right now, regular expressions to match it are defined only up to
# the start delimiter, e.g.:
#
# \bSTRUCT_GROUP\(
#
# is similar to: STRUCT_GROUP\((.*)\)
# except that the content inside the match group is delimiter's aligned.
#
# The content inside parenthesis are converted into a single replace
# group (e.g. r`\1').
#
# It would be nice to change such definition to support multiple
# match groups, allowing a regex equivalent to.
#
# FOO\((.*), (.*), (.*)\)
#
# it is probably easier to define it not as a regular expression, but
# with some lexical definition like:
#
# FOO(arg1, arg2, arg3)
DELIMITER_PAIRS = {
'{': '}',
'(': ')',
'[': ']',
}
RE_DELIM = re.compile(r'[\{\}\[\]\(\)]')
def _search(self, regex, line):
"""
Finds paired blocks for a regex that ends with a delimiter.
The suggestion of using finditer to match pairs came from:
https://stackoverflow.com/questions/5454322/python-how-to-match-nested-parentheses-with-regex
but I ended using a different implementation to align all three types
of delimiters and seek for an initial regular expression.
The algorithm seeks for open/close paired delimiters and place them
into a stack, yielding a start/stop position of each match when the
stack is zeroed.
The algorithm shoud work fine for properly paired lines, but will
silently ignore end delimiters that preceeds an start delimiter.
This should be OK for kernel-doc parser, as unaligned delimiters
would cause compilation errors. So, we don't need to rise exceptions
to cover such issues.
"""
stack = []
for match_re in regex.finditer(line):
start = match_re.start()
offset = match_re.end()
d = line[offset -1]
if d not in self.DELIMITER_PAIRS:
continue
end = self.DELIMITER_PAIRS[d]
stack.append(end)
for match in self.RE_DELIM.finditer(line[offset:]):
pos = match.start() + offset
d = line[pos]
if d in self.DELIMITER_PAIRS:
end = self.DELIMITER_PAIRS[d]
stack.append(end)
continue
# Does the end delimiter match what it is expected?
if stack and d == stack[-1]:
stack.pop()
if not stack:
yield start, offset, pos + 1
break
def search(self, regex, line):
"""
This is similar to re.search:
It matches a regex that it is followed by a delimiter,
returning occurrences only if all delimiters are paired.
"""
for t in self._search(regex, line):
yield line[t[0]:t[2]]
def sub(self, regex, sub, line, count=0):
"""
This is similar to re.sub:
It matches a regex that it is followed by a delimiter,
replacing occurrences only if all delimiters are paired.
if r'\1' is used, it works just like re: it places there the
matched paired data with the delimiter stripped.
If count is different than zero, it will replace at most count
items.
"""
out = ""
cur_pos = 0
n = 0
found = False
for start, end, pos in self._search(regex, line):
out += line[cur_pos:start]
# Value, ignoring start/end delimiters
value = line[end:pos - 1]
# replaces \1 at the sub string, if \1 is used there
new_sub = sub
new_sub = new_sub.replace(r'\1', value)
out += new_sub
# Drop end ';' if any
if line[pos] == ';':
pos += 1
cur_pos = pos
n += 1
if count and count >= n:
break
# Append the remaining string
l = len(line)
out += line[cur_pos:l]
return out
#
# Regular expressions used to parse kernel-doc markups at KernelDoc class.
#
# Let's declare them in lowercase outside any class to make easier to
# convert from the python script.
#
# As those are evaluated at the beginning, no need to cache them
#
# Allow whitespace at end of comment start.
doc_start = Re(r'^/\*\*\s*$', cache=False)
doc_end = Re(r'\*/', cache=False)
doc_com = Re(r'\s*\*\s*', cache=False)
doc_com_body = Re(r'\s*\* ?', cache=False)
doc_decl = doc_com + Re(r'(\w+)', cache=False)
# @params and a strictly limited set of supported section names
# Specifically:
# Match @word:
# @...:
# @{section-name}:
# while trying to not match literal block starts like "example::"
#
doc_sect = doc_com + \
Re(r'\s*(\@[.\w]+|\@\.\.\.|description|context|returns?|notes?|examples?)\s*:([^:].*)?$',
flags=re.I, cache=False)
doc_content = doc_com_body + Re(r'(.*)', cache=False)
doc_block = doc_com + Re(r'DOC:\s*(.*)?', cache=False)
doc_inline_start = Re(r'^\s*/\*\*\s*$', cache=False)
doc_inline_sect = Re(r'\s*\*\s*(@\s*[\w][\w\.]*\s*):(.*)', cache=False)
doc_inline_end = Re(r'^\s*\*/\s*$', cache=False)
doc_inline_oneline = Re(r'^\s*/\*\*\s*(@[\w\s]+):\s*(.*)\s*\*/\s*$', cache=False)
function_pointer = Re(r"([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)", cache=False)
attribute = Re(r"__attribute__\s*\(\([a-z0-9,_\*\s\(\)]*\)\)",
flags=re.I | re.S, cache=False)
# match expressions used to find embedded type information
type_constant = Re(r"\b``([^\`]+)``\b", cache=False)
type_constant2 = Re(r"\%([-_*\w]+)", cache=False)
type_func = Re(r"(\w+)\(\)", cache=False)
type_param = Re(r"\@(\w*((\.\w+)|(->\w+))*(\.\.\.)?)", cache=False)
type_param_ref = Re(r"([\!~\*]?)\@(\w*((\.\w+)|(->\w+))*(\.\.\.)?)", cache=False)
# Special RST handling for func ptr params
type_fp_param = Re(r"\@(\w+)\(\)", cache=False)
# Special RST handling for structs with func ptr params
type_fp_param2 = Re(r"\@(\w+->\S+)\(\)", cache=False)
type_env = Re(r"(\$\w+)", cache=False)
type_enum = Re(r"\&(enum\s*([_\w]+))", cache=False)
type_struct = Re(r"\&(struct\s*([_\w]+))", cache=False)
type_typedef = Re(r"\&(typedef\s*([_\w]+))", cache=False)
type_union = Re(r"\&(union\s*([_\w]+))", cache=False)
type_member = Re(r"\&([_\w]+)(\.|->)([_\w]+)", cache=False)
type_fallback = Re(r"\&([_\w]+)", cache=False)
type_member_func = type_member + Re(r"\(\)", cache=False)
export_symbol = Re(r'^\s*EXPORT_SYMBOL(_GPL)?\s*\(\s*(\w+)\s*\)\s*', cache=False)
export_symbol_ns = Re(r'^\s*EXPORT_SYMBOL_NS(_GPL)?\s*\(\s*(\w+)\s*,\s*"\S+"\)\s*', cache=False)
class KernelDoc:
# Parser states
STATE_NORMAL = 0 # normal code
STATE_NAME = 1 # looking for function name
STATE_BODY_MAYBE = 2 # body - or maybe more description
STATE_BODY = 3 # the body of the comment
STATE_BODY_WITH_BLANK_LINE = 4 # the body which has a blank line
STATE_PROTO = 5 # scanning prototype
STATE_DOCBLOCK = 6 # documentation block
STATE_INLINE = 7 # gathering doc outside main block
st_name = [
"NORMAL",
"NAME",
"BODY_MAYBE",
"BODY",
"BODY_WITH_BLANK_LINE",
"PROTO",
"DOCBLOCK",
"INLINE",
]
# Inline documentation state
STATE_INLINE_NA = 0 # not applicable ($state != STATE_INLINE)
STATE_INLINE_NAME = 1 # looking for member name (@foo:)
STATE_INLINE_TEXT = 2 # looking for member documentation
STATE_INLINE_END = 3 # done
STATE_INLINE_ERROR = 4 # error - Comment without header was found.
# Spit a warning as it's not
# proper kernel-doc and ignore the rest.
st_inline_name = [
"",
"_NAME",
"_TEXT",
"_END",
"_ERROR",
]
# Section names
section_default = "Description" # default section
section_intro = "Introduction"
section_context = "Context"
section_return = "Return"
undescribed = "-- undescribed --"
def __init__(self, config, fname):
"""Initialize internal variables"""
self.fname = fname
self.config = config
# Initial state for the state machines
self.state = self.STATE_NORMAL
self.inline_doc_state = self.STATE_INLINE_NA
# Store entry currently being processed
self.entry = None
# Place all potential outputs into an array
self.entries = []
def show_warnings(self, dtype, declaration_name):
# TODO: implement it
return True
# TODO: rename to emit_message
def emit_warning(self, ln, msg, warning=True):
"""Emit a message"""
if warning:
self.config.log.warning("%s:%d %s", self.fname, ln, msg)
else:
self.config.log.info("%s:%d %s", self.fname, ln, msg)
def dump_section(self, start_new=True):
"""
Dumps section contents to arrays/hashes intended for that purpose.
"""
name = self.entry.section
contents = self.entry.contents
# TODO: we can prevent dumping empty sections here with:
#
# if self.entry.contents.strip("\n"):
# if start_new:
# self.entry.section = self.section_default
# self.entry.contents = ""
#
# return
#
# But, as we want to be producing the same output of the
# venerable kernel-doc Perl tool, let's just output everything,
# at least for now
if type_param.match(name):
name = type_param.group(1)
self.entry.parameterdescs[name] = contents
self.entry.parameterdesc_start_lines[name] = self.entry.new_start_line
self.entry.sectcheck += name + " "
self.entry.new_start_line = 0
elif name == "@...":
name = "..."
self.entry.parameterdescs[name] = contents
self.entry.sectcheck += name + " "
self.entry.parameterdesc_start_lines[name] = self.entry.new_start_line
self.entry.new_start_line = 0
else:
if name in self.entry.sections and self.entry.sections[name] != "":
# Only warn on user-specified duplicate section names
if name != self.section_default:
self.emit_warning(self.entry.new_start_line,
f"duplicate section name '{name}'\n")
self.entry.sections[name] += contents
else:
self.entry.sections[name] = contents
self.entry.sectionlist.append(name)
self.entry.section_start_lines[name] = self.entry.new_start_line
self.entry.new_start_line = 0
# self.config.log.debug("Section: %s : %s", name, pformat(vars(self.entry)))
if start_new:
self.entry.section = self.section_default
self.entry.contents = ""
# TODO: rename it to store_declaration
def output_declaration(self, dtype, name, **args):
"""
Stores the entry into an entry array.
The actual output and output filters will be handled elsewhere
"""
# The implementation here is different than the original kernel-doc:
# instead of checking for output filters or actually output anything,
# it just stores the declaration content at self.entries, as the
# output will happen on a separate class.
#
# For now, we're keeping the same name of the function just to make
# easier to compare the source code of both scripts
if "declaration_start_line" not in args:
args["declaration_start_line"] = self.entry.declaration_start_line
args["type"] = dtype
# TODO: use colletions.OrderedDict
sections = args.get('sections', {})
sectionlist = args.get('sectionlist', [])
# Drop empty sections
# TODO: improve it to emit warnings
for section in [ "Description", "Return" ]:
if section in sectionlist:
if not sections[section].rstrip():
del sections[section]
sectionlist.remove(section)
self.entries.append((name, args))
self.config.log.debug("Output: %s:%s = %s", dtype, name, pformat(args))
def reset_state(self, ln):
"""
Ancillary routine to create a new entry. It initializes all
variables used by the state machine.
"""
self.entry = argparse.Namespace
self.entry.contents = ""
self.entry.function = ""
self.entry.sectcheck = ""
self.entry.struct_actual = ""
self.entry.prototype = ""
self.entry.parameterlist = []
self.entry.parameterdescs = {}
self.entry.parametertypes = {}
self.entry.parameterdesc_start_lines = {}
self.entry.section_start_lines = {}
self.entry.sectionlist = []
self.entry.sections = {}
self.entry.anon_struct_union = False
self.entry.leading_space = None
# State flags
self.state = self.STATE_NORMAL
self.inline_doc_state = self.STATE_INLINE_NA
self.entry.brcount = 0
self.entry.in_doc_sect = False
self.entry.declaration_start_line = ln
def push_parameter(self, ln, decl_type, param, dtype,
org_arg, declaration_name):
if self.entry.anon_struct_union and dtype == "" and param == "}":
return # Ignore the ending }; from anonymous struct/union
self.entry.anon_struct_union = False
param = Re(r'[\[\)].*').sub('', param, count=1)
if dtype == "" and param.endswith("..."):
if Re(r'\w\.\.\.$').search(param):
# For named variable parameters of the form `x...`,
# remove the dots
param = param[:-3]
else:
# Handles unnamed variable parameters
param = "..."
if param not in self.entry.parameterdescs or \
not self.entry.parameterdescs[param]:
self.entry.parameterdescs[param] = "variable arguments"
elif dtype == "" and (not param or param == "void"):
param = "void"
self.entry.parameterdescs[param] = "no arguments"
elif dtype == "" and param in ["struct", "union"]:
# Handle unnamed (anonymous) union or struct
dtype = param
param = "{unnamed_" + param + "}"
self.entry.parameterdescs[param] = "anonymous\n"
self.entry.anon_struct_union = True
# Handle cache group enforcing variables: they do not need
# to be described in header files
elif "__cacheline_group" in param:
# Ignore __cacheline_group_begin and __cacheline_group_end
return
# Warn if parameter has no description
# (but ignore ones starting with # as these are not parameters
# but inline preprocessor statements)
if param not in self.entry.parameterdescs and not param.startswith("#"):
self.entry.parameterdescs[param] = self.undescribed
if self.show_warnings(dtype, declaration_name) and "." not in param:
if decl_type == 'function':
dname = f"{decl_type} parameter"
else:
dname = f"{decl_type} member"
self.emit_warning(ln,
f"{dname} '{param}' not described in '{declaration_name}'")
# Strip spaces from param so that it is one continuous string on
# parameterlist. This fixes a problem where check_sections()
# cannot find a parameter like "addr[6 + 2]" because it actually
# appears as "addr[6", "+", "2]" on the parameter list.
# However, it's better to maintain the param string unchanged for
# output, so just weaken the string compare in check_sections()
# to ignore "[blah" in a parameter string.
self.entry.parameterlist.append(param)
org_arg = Re(r'\s\s+').sub(' ', org_arg)
self.entry.parametertypes[param] = org_arg
def save_struct_actual(self, actual):
"""
Strip all spaces from the actual param so that it looks like
one string item.
"""
actual = Re(r'\s*').sub("", actual, count=1)
self.entry.struct_actual += actual + " "
def create_parameter_list(self, ln, decl_type, args, splitter, declaration_name):
# temporarily replace all commas inside function pointer definition
arg_expr = Re(r'(\([^\),]+),')
while arg_expr.search(args):
args = arg_expr.sub(r"\1#", args)
for arg in args.split(splitter):
# Strip comments
arg = Re(r'\/\*.*\*\/').sub('', arg)
# Ignore argument attributes
arg = Re(r'\sPOS0?\s').sub(' ', arg)
# Strip leading/trailing spaces
arg = arg.strip()
arg = Re(r'\s+').sub(' ', arg, count=1)
if arg.startswith('#'):
# Treat preprocessor directive as a typeless variable just to fill
# corresponding data structures "correctly". Catch it later in
# output_* subs.
# Treat preprocessor directive as a typeless variable
self.push_parameter(ln, decl_type, arg, "",
"", declaration_name)
elif Re(r'\(.+\)\s*\(').search(arg):
# Pointer-to-function
arg = arg.replace('#', ',')
r = Re(r'[^\(]+\(\*?\s*([\w\[\]\.]*)\s*\)')
if r.match(arg):
param = r.group(1)
else:
self.emit_warning(ln, f"Invalid param: {arg}")
param = arg
dtype = Re(r'([^\(]+\(\*?)\s*' + re.escape(param)).sub(r'\1', arg)
self.save_struct_actual(param)
self.push_parameter(ln, decl_type, param, dtype,
arg, declaration_name)
elif Re(r'\(.+\)\s*\[').search(arg):
# Array-of-pointers
arg = arg.replace('#', ',')
r = Re(r'[^\(]+\(\s*\*\s*([\w\[\]\.]*?)\s*(\s*\[\s*[\w]+\s*\]\s*)*\)')
if r.match(arg):
param = r.group(1)
else:
self.emit_warning(ln, f"Invalid param: {arg}")
param = arg
dtype = Re(r'([^\(]+\(\*?)\s*' + re.escape(param)).sub(r'\1', arg)
self.save_struct_actual(param)
self.push_parameter(ln, decl_type, param, dtype,
arg, declaration_name)
elif arg:
arg = Re(r'\s*:\s*').sub(":", arg)
arg = Re(r'\s*\[').sub('[', arg)
args = Re(r'\s*,\s*').split(arg)
if args[0] and '*' in args[0]:
args[0] = re.sub(r'(\*+)\s*', r' \1', args[0])
first_arg = []
r = Re(r'^(.*\s+)(.*?\[.*\].*)$')
if args[0] and r.match(args[0]):
args.pop(0)
first_arg.extend(r.group(1))
first_arg.append(r.group(2))
else:
first_arg = Re(r'\s+').split(args.pop(0))
args.insert(0, first_arg.pop())
dtype = ' '.join(first_arg)
for param in args:
if Re(r'^(\*+)\s*(.*)').match(param):
r = Re(r'^(\*+)\s*(.*)')
if not r.match(param):
self.emit_warning(ln, f"Invalid param: {param}")
continue
param = r.group(1)
self.save_struct_actual(r.group(2))
self.push_parameter(ln, decl_type, r.group(2),
f"{dtype} {r.group(1)}",
arg, declaration_name)
elif Re(r'(.*?):(\w+)').search(param):
r = Re(r'(.*?):(\w+)')
if not r.match(param):
self.emit_warning(ln, f"Invalid param: {param}")
continue
if dtype != "": # Skip unnamed bit-fields
self.save_struct_actual(r.group(1))
self.push_parameter(ln, decl_type, r.group(1),
f"{dtype}:{r.group(2)}",
arg, declaration_name)
else:
self.save_struct_actual(param)
self.push_parameter(ln, decl_type, param, dtype,
arg, declaration_name)
def check_sections(self, ln, decl_name, decl_type, sectcheck, prmscheck):
sects = sectcheck.split()
prms = prmscheck.split()
err = False
for sx in range(len(sects)): # pylint: disable=C0200
err = True
for px in range(len(prms)): # pylint: disable=C0200
prm_clean = prms[px]
prm_clean = Re(r'\[.*\]').sub('', prm_clean)
prm_clean = attribute.sub('', prm_clean)
# ignore array size in a parameter string;
# however, the original param string may contain
# spaces, e.g.: addr[6 + 2]
# and this appears in @prms as "addr[6" since the
# parameter list is split at spaces;
# hence just ignore "[..." for the sections check;
prm_clean = Re(r'\[.*').sub('', prm_clean)
if prm_clean == sects[sx]:
err = False
break
if err:
if decl_type == 'function':
dname = f"{decl_type} parameter"
else:
dname = f"{decl_type} member"
self.emit_warning(ln,
f"Excess {dname} '{sects[sx]}' description in '{decl_name}'")
def check_return_section(self, ln, declaration_name, return_type):
if not self.config.wreturn:
return
# Ignore an empty return type (It's a macro)
# Ignore functions with a "void" return type (but not "void *")
if not return_type or Re(r'void\s*\w*\s*$').search(return_type):
return
if not self.entry.sections.get("Return", None):
self.emit_warning(ln,
f"No description found for return value of '{declaration_name}'")
def dump_struct(self, ln, proto):
"""
Store an entry for an struct or union
"""
type_pattern = r'(struct|union)'
qualifiers = [
"__attribute__",
"__packed",
"__aligned",
"____cacheline_aligned_in_smp",
"____cacheline_aligned",
]
definition_body = r'\{(.*)\}\s*' + "(?:" + '|'.join(qualifiers) + ")?"
struct_members = Re(type_pattern + r'([^\{\};]+)(\{)([^\{\}]*)(\})([^\{\}\;]*)(\;)')
# Extract struct/union definition
members = None
declaration_name = None
decl_type = None
r = Re(type_pattern + r'\s+(\w+)\s*' + definition_body)
if r.search(proto):
decl_type = r.group(1)
declaration_name = r.group(2)
members = r.group(3)
else:
r = Re(r'typedef\s+' + type_pattern + r'\s*' + definition_body + r'\s*(\w+)\s*;')
if r.search(proto):
decl_type = r.group(1)
declaration_name = r.group(3)
members = r.group(2)
if not members:
self.emit_warning(ln, f"{proto} error: Cannot parse struct or union!")
self.config.errors += 1
return
if self.entry.identifier != declaration_name:
self.emit_warning(ln,
f"expecting prototype for {decl_type} {self.entry.identifier}. Prototype was for {decl_type} {declaration_name} instead\n")
return
args_pattern =r'([^,)]+)'
sub_prefixes = [
(Re(r'\/\*\s*private:.*?\/\*\s*public:.*?\*\/', re.S | re.I), ''),
(Re(r'\/\*\s*private:.*', re.S| re.I), ''),
# Strip comments
(Re(r'\/\*.*?\*\/', re.S), ''),
# Strip attributes
(attribute, ' '),
(Re(r'\s*__aligned\s*\([^;]*\)', re.S), ' '),
(Re(r'\s*__counted_by\s*\([^;]*\)', re.S), ' '),
(Re(r'\s*__counted_by_(le|be)\s*\([^;]*\)', re.S), ' '),
(Re(r'\s*__packed\s*', re.S), ' '),
(Re(r'\s*CRYPTO_MINALIGN_ATTR', re.S), ' '),
(Re(r'\s*____cacheline_aligned_in_smp', re.S), ' '),
(Re(r'\s*____cacheline_aligned', re.S), ' '),
# Unwrap struct_group macros based on this definition:
# __struct_group(TAG, NAME, ATTRS, MEMBERS...)
# which has variants like: struct_group(NAME, MEMBERS...)
# Only MEMBERS arguments require documentation.
#
# Parsing them happens on two steps:
#
# 1. drop struct group arguments that aren't at MEMBERS,
# storing them as STRUCT_GROUP(MEMBERS)
#
# 2. remove STRUCT_GROUP() ancillary macro.
#
# The original logic used to remove STRUCT_GROUP() using an
# advanced regex:
#
# \bSTRUCT_GROUP(\(((?:(?>[^)(]+)|(?1))*)\))[^;]*;
#
# with two patterns that are incompatible with
# Python re module, as it has:
#
# - a recursive pattern: (?1)
# - an atomic grouping: (?>...)
#
# I tried a simpler version: but it didn't work either:
# \bSTRUCT_GROUP\(([^\)]+)\)[^;]*;
#
# As it doesn't properly match the end parenthesis on some cases.
#
# So, a better solution was crafted: there's now a NestedMatch
# class that ensures that delimiters after a search are properly
# matched. So, the implementation to drop STRUCT_GROUP() will be
# handled in separate.
(Re(r'\bstruct_group\s*\(([^,]*,)', re.S), r'STRUCT_GROUP('),
(Re(r'\bstruct_group_attr\s*\(([^,]*,){2}', re.S), r'STRUCT_GROUP('),
(Re(r'\bstruct_group_tagged\s*\(([^,]*),([^,]*),', re.S), r'struct \1 \2; STRUCT_GROUP('),
(Re(r'\b__struct_group\s*\(([^,]*,){3}', re.S), r'STRUCT_GROUP('),
# Replace macros
#
# TODO: it is better to also move those to the NestedMatch logic,
# to ensure that parenthesis will be properly matched.
(Re(r'__ETHTOOL_DECLARE_LINK_MODE_MASK\s*\(([^\)]+)\)', re.S), r'DECLARE_BITMAP(\1, __ETHTOOL_LINK_MODE_MASK_NBITS)'),
(Re(r'DECLARE_PHY_INTERFACE_MASK\s*\(([^\)]+)\)', re.S), r'DECLARE_BITMAP(\1, PHY_INTERFACE_MODE_MAX)'),
(Re(r'DECLARE_BITMAP\s*\(' + args_pattern + r',\s*' + args_pattern + r'\)', re.S), r'unsigned long \1[BITS_TO_LONGS(\2)]'),
(Re(r'DECLARE_HASHTABLE\s*\(' + args_pattern + r',\s*' + args_pattern + r'\)', re.S), r'unsigned long \1[1 << ((\2) - 1)]'),
(Re(r'DECLARE_KFIFO\s*\(' + args_pattern + r',\s*' + args_pattern + r',\s*' + args_pattern + r'\)', re.S), r'\2 *\1'),
(Re(r'DECLARE_KFIFO_PTR\s*\(' + args_pattern + r',\s*' + args_pattern + r'\)', re.S), r'\2 *\1'),
(Re(r'(?:__)?DECLARE_FLEX_ARRAY\s*\(' + args_pattern + r',\s*' + args_pattern + r'\)', re.S), r'\1 \2[]'),
(Re(r'DEFINE_DMA_UNMAP_ADDR\s*\(' + args_pattern + r'\)', re.S), r'dma_addr_t \1'),
(Re(r'DEFINE_DMA_UNMAP_LEN\s*\(' + args_pattern + r'\)', re.S), r'__u32 \1'),
]
# Regexes here are guaranteed to have the end limiter matching
# the start delimiter. Yet, right now, only one replace group
# is allowed.
sub_nested_prefixes = [
(re.compile(r'\bSTRUCT_GROUP\('), r'\1'),
]
for search, sub in sub_prefixes:
members = search.sub(sub, members)
nested = NestedMatch()
for search, sub in sub_nested_prefixes:
members = nested.sub(search, sub, members)
# Keeps the original declaration as-is
declaration = members
# Split nested struct/union elements
#
# This loop was simpler at the original kernel-doc perl version, as
# while ($members =~ m/$struct_members/) { ... }
# reads 'members' string on each interaction.
#
# Python behavior is different: it parses 'members' only once,
# creating a list of tuples from the first interaction.
#
# On other words, this won't get nested structs.
#
# So, we need to have an extra loop on Python to override such
# re limitation.
while True:
tuples = struct_members.findall(members)
if not tuples:
break
for t in tuples:
newmember = ""
maintype = t[0]
s_ids = t[5]
content = t[3]
oldmember = "".join(t)
for s_id in s_ids.split(','):
s_id = s_id.strip()
newmember += f"{maintype} {s_id}; "
s_id = Re(r'[:\[].*').sub('', s_id)
s_id = Re(r'^\s*\**(\S+)\s*').sub(r'\1', s_id)
for arg in content.split(';'):
arg = arg.strip()
if not arg:
continue
r = Re(r'^([^\(]+\(\*?\s*)([\w\.]*)(\s*\).*)')
if r.match(arg):
# Pointer-to-function
dtype = r.group(1)
name = r.group(2)
extra = r.group(3)
if not name:
continue
if not s_id:
# Anonymous struct/union
newmember += f"{dtype}{name}{extra}; "
else:
newmember += f"{dtype}{s_id}.{name}{extra}; "
else:
arg = arg.strip()
# Handle bitmaps
arg = Re(r':\s*\d+\s*').sub('', arg)
# Handle arrays
arg = Re(r'\[.*\]').sub('', arg)
# Handle multiple IDs
arg = Re(r'\s*,\s*').sub(',', arg)
r = Re(r'(.*)\s+([\S+,]+)')
if r.search(arg):
dtype = r.group(1)
names = r.group(2)
else:
newmember += f"{arg}; "
continue
for name in names.split(','):
name = Re(r'^\s*\**(\S+)\s*').sub(r'\1', name).strip()
if not name:
continue
if not s_id:
# Anonymous struct/union
newmember += f"{dtype} {name}; "
else:
newmember += f"{dtype} {s_id}.{name}; "
members = members.replace(oldmember, newmember)
# Ignore other nested elements, like enums
members = re.sub(r'(\{[^\{\}]*\})', '', members)
self.create_parameter_list(ln, decl_type, members, ';',
declaration_name)
self.check_sections(ln, declaration_name, decl_type,
self.entry.sectcheck, self.entry.struct_actual)
# Adjust declaration for better display
declaration = Re(r'([\{;])').sub(r'\1\n', declaration)
declaration = Re(r'\}\s+;').sub('};', declaration)
# Better handle inlined enums
while True:
r = Re(r'(enum\s+\{[^\}]+),([^\n])')
if not r.search(declaration):
break
declaration = r.sub(r'\1,\n\2', declaration)
def_args = declaration.split('\n')
level = 1
declaration = ""
for clause in def_args:
clause = clause.strip()
clause = Re(r'\s+').sub(' ', clause, count=1)
if not clause:
continue
if '}' in clause and level > 1:
level -= 1
if not Re(r'^\s*#').match(clause):
declaration += "\t" * level
declaration += "\t" + clause + "\n"
if "{" in clause and "}" not in clause:
level += 1
self.output_declaration(decl_type, declaration_name,
struct=declaration_name,
module=self.entry.modulename,
definition=declaration,
parameterlist=self.entry.parameterlist,
parameterdescs=self.entry.parameterdescs,
parametertypes=self.entry.parametertypes,
sectionlist=self.entry.sectionlist,
sections=self.entry.sections,
purpose=self.entry.declaration_purpose)
def dump_enum(self, ln, proto):
# Ignore members marked private
proto = Re(r'\/\*\s*private:.*?\/\*\s*public:.*?\*\/', flags=re.S).sub('', proto)
proto = Re(r'\/\*\s*private:.*}', flags=re.S).sub('}', proto)
# Strip comments
proto = Re(r'\/\*.*?\*\/', flags=re.S).sub('', proto)
# Strip #define macros inside enums
proto = Re(r'#\s*((define|ifdef|if)\s+|endif)[^;]*;', flags=re.S).sub('', proto)
members = None
declaration_name = None
r = Re(r'typedef\s+enum\s*\{(.*)\}\s*(\w*)\s*;')
if r.search(proto):
declaration_name = r.group(2)
members = r.group(1).rstrip()
else:
r = Re(r'enum\s+(\w*)\s*\{(.*)\}')
if r.match(proto):
declaration_name = r.group(1)
members = r.group(2).rstrip()
if not members:
self.emit_warning(ln, f"{proto}: error: Cannot parse enum!")
self.config.errors += 1
return
if self.entry.identifier != declaration_name:
if self.entry.identifier == "":
self.emit_warning(ln,
f"{proto}: wrong kernel-doc identifier on prototype")
else:
self.emit_warning(ln,
f"expecting prototype for enum {self.entry.identifier}. Prototype was for enum {declaration_name} instead")
return
if not declaration_name:
declaration_name = "(anonymous)"
member_set = set()
members = Re(r'\([^;]*?[\)]').sub('', members)
for arg in members.split(','):
if not arg:
continue
arg = Re(r'^\s*(\w+).*').sub(r'\1', arg)
self.entry.parameterlist.append(arg)
if arg not in self.entry.parameterdescs:
self.entry.parameterdescs[arg] = self.undescribed
if self.show_warnings("enum", declaration_name):
self.emit_warning(ln,
f"Enum value '{arg}' not described in enum '{declaration_name}'")
member_set.add(arg)
for k in self.entry.parameterdescs:
if k not in member_set:
if self.show_warnings("enum", declaration_name):
self.emit_warning(ln,
f"Excess enum value '%{k}' description in '{declaration_name}'")
self.output_declaration('enum', declaration_name,
enum=declaration_name,
module=self.config.modulename,
parameterlist=self.entry.parameterlist,
parameterdescs=self.entry.parameterdescs,
sectionlist=self.entry.sectionlist,
sections=self.entry.sections,
purpose=self.entry.declaration_purpose)
def dump_declaration(self, ln, prototype):
if self.entry.decl_type == "enum":
self.dump_enum(ln, prototype)
return
if self.entry.decl_type == "typedef":
self.dump_typedef(ln, prototype)
return
if self.entry.decl_type in ["union", "struct"]:
self.dump_struct(ln, prototype)
return
# TODO: handle other types
self.output_declaration(self.entry.decl_type, prototype,
entry=self.entry)
def dump_function(self, ln, prototype):
func_macro = False
return_type = ''
decl_type = 'function'
# Prefixes that would be removed
sub_prefixes = [
(r"^static +", "", 0),
(r"^extern +", "", 0),
(r"^asmlinkage +", "", 0),
(r"^inline +", "", 0),
(r"^__inline__ +", "", 0),
(r"^__inline +", "", 0),
(r"^__always_inline +", "", 0),
(r"^noinline +", "", 0),
(r"^__FORTIFY_INLINE +", "", 0),
(r"__init +", "", 0),
(r"__init_or_module +", "", 0),
(r"__deprecated +", "", 0),
(r"__flatten +", "", 0),
(r"__meminit +", "", 0),
(r"__must_check +", "", 0),
(r"__weak +", "", 0),
(r"__sched +", "", 0),
(r"_noprof", "", 0),
(r"__printf\s*\(\s*\d*\s*,\s*\d*\s*\) +", "", 0),
(r"__(?:re)?alloc_size\s*\(\s*\d+\s*(?:,\s*\d+\s*)?\) +", "", 0),
(r"__diagnose_as\s*\(\s*\S+\s*(?:,\s*\d+\s*)*\) +", "", 0),
(r"DECL_BUCKET_PARAMS\s*\(\s*(\S+)\s*,\s*(\S+)\s*\)", r"\1, \2", 0),
(r"__attribute_const__ +", "", 0),
# It seems that Python support for re.X is broken:
# At least for me (Python 3.13), this didn't work
# (r"""
# __attribute__\s*\(\(
# (?:
# [\w\s]+ # attribute name
# (?:\([^)]*\))? # attribute arguments
# \s*,? # optional comma at the end
# )+
# \)\)\s+
# """, "", re.X),
# So, remove whitespaces and comments from it
(r"__attribute__\s*\(\((?:[\w\s]+(?:\([^)]*\))?\s*,?)+\)\)\s+", "", 0),
]
for search, sub, flags in sub_prefixes:
prototype = Re(search, flags).sub(sub, prototype)
# Macros are a special case, as they change the prototype format
new_proto = Re(r"^#\s*define\s+").sub("", prototype)
if new_proto != prototype:
is_define_proto = True
prototype = new_proto
else:
is_define_proto = False
# Yes, this truly is vile. We are looking for:
# 1. Return type (may be nothing if we're looking at a macro)
# 2. Function name
# 3. Function parameters.
#
# All the while we have to watch out for function pointer parameters
# (which IIRC is what the two sections are for), C types (these
# regexps don't even start to express all the possibilities), and
# so on.
#
# If you mess with these regexps, it's a good idea to check that
# the following functions' documentation still comes out right:
# - parport_register_device (function pointer parameters)
# - atomic_set (macro)
# - pci_match_device, __copy_to_user (long return type)
name = r'[a-zA-Z0-9_~:]+'
prototype_end1 = r'[^\(]*'
prototype_end2 = r'[^\{]*'
prototype_end = fr'\(({prototype_end1}|{prototype_end2})\)'
# Besides compiling, Perl qr{[\w\s]+} works as a non-capturing group.
# So, this needs to be mapped in Python with (?:...)? or (?:...)+
type1 = r'(?:[\w\s]+)?'
type2 = r'(?:[\w\s]+\*+)+'
found = False
if is_define_proto:
r = Re(r'^()(' + name + r')\s+')
if r.search(prototype):
return_type = ''
declaration_name = r.group(2)
func_macro = True
found = True
if not found:
patterns = [
rf'^()({name})\s*{prototype_end}',
rf'^({type1})\s+({name})\s*{prototype_end}',
rf'^({type2})\s*({name})\s*{prototype_end}',
]
for p in patterns:
r = Re(p)
if r.match(prototype):
return_type = r.group(1)
declaration_name = r.group(2)
args = r.group(3)
self.create_parameter_list(ln, decl_type, args, ',',
declaration_name)
found = True
break
if not found:
self.emit_warning(ln,
f"cannot understand function prototype: '{prototype}'")
return
if self.entry.identifier != declaration_name:
self.emit_warning(ln,
f"expecting prototype for {self.entry.identifier}(). Prototype was for {declaration_name}() instead")
return
prms = " ".join(self.entry.parameterlist)
self.check_sections(ln, declaration_name, "function",
self.entry.sectcheck, prms)
self.check_return_section(ln, declaration_name, return_type)
if 'typedef' in return_type:
self.output_declaration(decl_type, declaration_name,
function=declaration_name,
typedef=True,
module=self.config.modulename,
functiontype=return_type,
parameterlist=self.entry.parameterlist,
parameterdescs=self.entry.parameterdescs,
parametertypes=self.entry.parametertypes,
sectionlist=self.entry.sectionlist,
sections=self.entry.sections,
purpose=self.entry.declaration_purpose,
func_macro=func_macro)
else:
self.output_declaration(decl_type, declaration_name,
function=declaration_name,
typedef=False,
module=self.config.modulename,
functiontype=return_type,
parameterlist=self.entry.parameterlist,
parameterdescs=self.entry.parameterdescs,
parametertypes=self.entry.parametertypes,
sectionlist=self.entry.sectionlist,
sections=self.entry.sections,
purpose=self.entry.declaration_purpose,
func_macro=func_macro)
def dump_typedef(self, ln, proto):
typedef_type = r'((?:\s+[\w\*]+\b){1,8})\s*'
typedef_ident = r'\*?\s*(\w\S+)\s*'
typedef_args = r'\s*\((.*)\);'
typedef1 = Re(r'typedef' + typedef_type + r'\(' + typedef_ident + r'\)' + typedef_args)
typedef2 = Re(r'typedef' + typedef_type + typedef_ident + typedef_args)
# Strip comments
proto = Re(r'/\*.*?\*/', flags=re.S).sub('', proto)
# Parse function typedef prototypes
for r in [typedef1, typedef2]:
if not r.match(proto):
continue
return_type = r.group(1).strip()
declaration_name = r.group(2)
args = r.group(3)
if self.entry.identifier != declaration_name:
self.emit_warning(ln,
f"expecting prototype for typedef {self.entry.identifier}. Prototype was for typedef {declaration_name} instead\n")
return
decl_type = 'function'
self.create_parameter_list(ln, decl_type, args, ',', declaration_name)
self.output_declaration(decl_type, declaration_name,
function=declaration_name,
typedef=True,
module=self.entry.modulename,
functiontype=return_type,
parameterlist=self.entry.parameterlist,
parameterdescs=self.entry.parameterdescs,
parametertypes=self.entry.parametertypes,
sectionlist=self.entry.sectionlist,
sections=self.entry.sections,
purpose=self.entry.declaration_purpose)
return
# Handle nested parentheses or brackets
r = Re(r'(\(*.\)\s*|\[*.\]\s*);$')
while r.search(proto):
proto = r.sub('', proto)
# Parse simple typedefs
r = Re(r'typedef.*\s+(\w+)\s*;')
if r.match(proto):
declaration_name = r.group(1)
if self.entry.identifier != declaration_name:
self.emit_warning(ln, f"expecting prototype for typedef {self.entry.identifier}. Prototype was for typedef {declaration_name} instead\n")
return
self.output_declaration('typedef', declaration_name,
typedef=declaration_name,
module=self.entry.modulename,
sectionlist=self.entry.sectionlist,
sections=self.entry.sections,
purpose=self.entry.declaration_purpose)
return
self.emit_warning(ln, "error: Cannot parse typedef!")
self.config.errors += 1
@staticmethod
def process_export(function_table, line):
"""
process EXPORT_SYMBOL* tags
This method is called both internally and externally, so, it
doesn't use self.
"""
if export_symbol.search(line):
symbol = export_symbol.group(2)
function_table.add(symbol)
if export_symbol_ns.search(line):
symbol = export_symbol_ns.group(2)
function_table.add(symbol)
def process_normal(self, ln, line):
"""
STATE_NORMAL: looking for the /** to begin everything.
"""
if not doc_start.match(line):
return
# start a new entry
self.reset_state(ln + 1)
self.entry.in_doc_sect = False
# next line is always the function name
self.state = self.STATE_NAME
def process_name(self, ln, line):
"""
STATE_NAME: Looking for the "name - description" line
"""
if doc_block.search(line):
self.entry.new_start_line = ln
if not doc_block.group(1):
self.entry.section = self.section_intro
else:
self.entry.section = doc_block.group(1)
self.state = self.STATE_DOCBLOCK
return
if doc_decl.search(line):
self.entry.identifier = doc_decl.group(1)
self.entry.is_kernel_comment = False
decl_start = str(doc_com) # comment block asterisk
fn_type = r"(?:\w+\s*\*\s*)?" # type (for non-functions)
parenthesis = r"(?:\(\w*\))?" # optional parenthesis on function
decl_end = r"(?:[-:].*)" # end of the name part
# test for pointer declaration type, foo * bar() - desc
r = Re(fr"^{decl_start}([\w\s]+?){parenthesis}?\s*{decl_end}?$")
if r.search(line):
self.entry.identifier = r.group(1)
# Test for data declaration
r = Re(r"^\s*\*?\s*(struct|union|enum|typedef)\b\s*(\w*)")
if r.search(line):
self.entry.decl_type = r.group(1)
self.entry.identifier = r.group(2)
self.entry.is_kernel_comment = True
else:
# Look for foo() or static void foo() - description;
# or misspelt identifier
r1 = Re(fr"^{decl_start}{fn_type}(\w+)\s*{parenthesis}\s*{decl_end}?$")
r2 = Re(fr"^{decl_start}{fn_type}(\w+[^-:]*){parenthesis}\s*{decl_end}$")
for r in [r1, r2]:
if r.search(line):
self.entry.identifier = r.group(1)
self.entry.decl_type = "function"
r = Re(r"define\s+")
self.entry.identifier = r.sub("", self.entry.identifier)
self.entry.is_kernel_comment = True
break
self.entry.identifier = self.entry.identifier.strip(" ")
self.state = self.STATE_BODY
# if there's no @param blocks need to set up default section here
self.entry.section = self.section_default
self.entry.new_start_line = ln + 1
r = Re("[-:](.*)")
if r.search(line):
# strip leading/trailing/multiple spaces
self.entry.descr = r.group(1).strip(" ")
r = Re(r"\s+")
self.entry.descr = r.sub(" ", self.entry.descr)
self.entry.declaration_purpose = self.entry.descr
self.state = self.STATE_BODY_MAYBE
else:
self.entry.declaration_purpose = ""
if not self.entry.is_kernel_comment:
self.emit_warning(ln,
f"This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst\n{line}")
self.state = self.STATE_NORMAL
if not self.entry.declaration_purpose and self.config.wshort_desc:
self.emit_warning(ln,
f"missing initial short description on line:\n{line}")
if not self.entry.identifier and self.entry.decl_type != "enum":
self.emit_warning(ln,
f"wrong kernel-doc identifier on line:\n{line}")
self.state = self.STATE_NORMAL
if self.config.verbose:
self.emit_warning(ln,
f"Scanning doc for {self.entry.decl_type} {self.entry.identifier}",
warning=False)
return
# Failed to find an identifier. Emit a warning
self.emit_warning(ln, f"Cannot find identifier on line:\n{line}")
def process_body(self, ln, line):
"""
STATE_BODY and STATE_BODY_MAYBE: the bulk of a kerneldoc comment.
"""
if self.state == self.STATE_BODY_WITH_BLANK_LINE:
r = Re(r"\s*\*\s?\S")
if r.match(line):
self.dump_section()
self.entry.section = self.section_default
self.entry.new_start_line = line
self.entry.contents = ""
if doc_sect.search(line):
self.entry.in_doc_sect = True
newsection = doc_sect.group(1)
if newsection.lower() in ["description", "context"]:
newsection = newsection.title()
# Special case: @return is a section, not a param description
if newsection.lower() in ["@return", "@returns",
"return", "returns"]:
newsection = "Return"
# Perl kernel-doc has a check here for contents before sections.
# the logic there is always false, as in_doc_sect variable is
# always true. So, just don't implement Wcontents_before_sections
# .title()
newcontents = doc_sect.group(2)
if not newcontents:
newcontents = ""
if self.entry.contents.strip("\n"):
self.dump_section()
self.entry.new_start_line = ln
self.entry.section = newsection
self.entry.leading_space = None
self.entry.contents = newcontents.lstrip()
if self.entry.contents:
self.entry.contents += "\n"
self.state = self.STATE_BODY
return
if doc_end.search(line):
self.dump_section()
# Look for doc_com + <text> + doc_end:
r = Re(r'\s*\*\s*[a-zA-Z_0-9:\.]+\*/')
if r.match(line):
self.emit_warning(ln, f"suspicious ending line: {line}")
self.entry.prototype = ""
self.entry.new_start_line = ln + 1
self.state = self.STATE_PROTO
return
if doc_content.search(line):
cont = doc_content.group(1)
if cont == "":
if self.entry.section == self.section_context:
self.dump_section()
self.entry.new_start_line = ln
self.state = self.STATE_BODY
else:
if self.entry.section != self.section_default:
self.state = self.STATE_BODY_WITH_BLANK_LINE
else:
self.state = self.STATE_BODY
self.entry.contents += "\n"
elif self.state == self.STATE_BODY_MAYBE:
# Continued declaration purpose
self.entry.declaration_purpose = self.entry.declaration_purpose.rstrip()
self.entry.declaration_purpose += " " + cont
r = Re(r"\s+")
self.entry.declaration_purpose = r.sub(' ',
self.entry.declaration_purpose)
else:
if self.entry.section.startswith('@') or \
self.entry.section == self.section_context:
if self.entry.leading_space is None:
r = Re(r'^(\s+)')
if r.match(cont):
self.entry.leading_space = len(r.group(1))
else:
self.entry.leading_space = 0
# Double-check if leading space are realy spaces
pos = 0
for i in range(0, self.entry.leading_space):
if cont[i] != " ":
break
pos += 1
cont = cont[pos:]
# NEW LOGIC:
# In case it is different, update it
if self.entry.leading_space != pos:
self.entry.leading_space = pos
self.entry.contents += cont + "\n"
return
# Unknown line, ignore
self.emit_warning(ln, f"bad line: {line}")
def process_inline(self, ln, line):
"""STATE_INLINE: docbook comments within a prototype."""
if self.inline_doc_state == self.STATE_INLINE_NAME and \
doc_inline_sect.search(line):
self.entry.section = doc_inline_sect.group(1)
self.entry.new_start_line = ln
self.entry.contents = doc_inline_sect.group(2).lstrip()
if self.entry.contents != "":
self.entry.contents += "\n"
self.inline_doc_state = self.STATE_INLINE_TEXT
# Documentation block end */
return
if doc_inline_end.search(line):
if self.entry.contents not in ["", "\n"]:
self.dump_section()
self.state = self.STATE_PROTO
self.inline_doc_state = self.STATE_INLINE_NA
return
if doc_content.search(line):
if self.inline_doc_state == self.STATE_INLINE_TEXT:
self.entry.contents += doc_content.group(1) + "\n"
if not self.entry.contents.strip(" ").rstrip("\n"):
self.entry.contents = ""
elif self.inline_doc_state == self.STATE_INLINE_NAME:
self.emit_warning(ln,
f"Incorrect use of kernel-doc format: {line}")
self.inline_doc_state = self.STATE_INLINE_ERROR
def syscall_munge(self, ln, proto):
"""
Handle syscall definitions
"""
is_void = False
# Strip newlines/CR's
proto = re.sub(r'[\r\n]+', ' ', proto)
# Check if it's a SYSCALL_DEFINE0
if 'SYSCALL_DEFINE0' in proto:
is_void = True
# Replace SYSCALL_DEFINE with correct return type & function name
proto = Re(r'SYSCALL_DEFINE.*\(').sub('long sys_', proto)
r = Re(r'long\s+(sys_.*?),')
if r.search(proto):
proto = proto.replace(',', '(', count=1)
elif is_void:
proto = proto.replace(')', '(void)', count=1)
# Now delete all of the odd-numbered commas in the proto
# so that argument types & names don't have a comma between them
count = 0
length = len(proto)
if is_void:
length = 0 # skip the loop if is_void
for ix in range(length):
if proto[ix] == ',':
count += 1
if count % 2 == 1:
proto = proto[:ix] + ' ' + proto[ix+1:]
return proto
def tracepoint_munge(self, ln, proto):
"""
Handle tracepoint definitions
"""
tracepointname = None
tracepointargs = None
# Match tracepoint name based on different patterns
r = Re(r'TRACE_EVENT\((.*?),')
if r.search(proto):
tracepointname = r.group(1)
r = Re(r'DEFINE_SINGLE_EVENT\((.*?),')
if r.search(proto):
tracepointname = r.group(1)
r = Re(r'DEFINE_EVENT\((.*?),(.*?),')
if r.search(proto):
tracepointname = r.group(2)
if tracepointname:
tracepointname = tracepointname.lstrip()
r = Re(r'TP_PROTO\((.*?)\)')
if r.search(proto):
tracepointargs = r.group(1)
if not tracepointname or not tracepointargs:
self.emit_warning(ln,
f"Unrecognized tracepoint format:\n{proto}\n")
else:
proto = f"static inline void trace_{tracepointname}({tracepointargs})"
self.entry.identifier = f"trace_{self.entry.identifier}"
return proto
def process_proto_function(self, ln, line):
"""Ancillary routine to process a function prototype"""
# strip C99-style comments to end of line
r = Re(r"\/\/.*$", re.S)
line = r.sub('', line)
if Re(r'\s*#\s*define').match(line):
self.entry.prototype = line
elif line.startswith('#'):
# Strip other macros like #ifdef/#ifndef/#endif/...
pass
else:
r = Re(r'([^\{]*)')
if r.match(line):
self.entry.prototype += r.group(1) + " "
if '{' in line or ';' in line or Re(r'\s*#\s*define').match(line):
# strip comments
r = Re(r'/\*.*?\*/')
self.entry.prototype = r.sub('', self.entry.prototype)
# strip newlines/cr's
r = Re(r'[\r\n]+')
self.entry.prototype = r.sub(' ', self.entry.prototype)
# strip leading spaces
r = Re(r'^\s+')
self.entry.prototype = r.sub('', self.entry.prototype)
# Handle self.entry.prototypes for function pointers like:
# int (*pcs_config)(struct foo)
r = Re(r'^(\S+\s+)\(\s*\*(\S+)\)')
self.entry.prototype = r.sub(r'\1\2', self.entry.prototype)
if 'SYSCALL_DEFINE' in self.entry.prototype:
self.entry.prototype = self.syscall_munge(ln,
self.entry.prototype)
r = Re(r'TRACE_EVENT|DEFINE_EVENT|DEFINE_SINGLE_EVENT')
if r.search(self.entry.prototype):
self.entry.prototype = self.tracepoint_munge(ln,
self.entry.prototype)
self.dump_function(ln, self.entry.prototype)
self.reset_state(ln)
def process_proto_type(self, ln, line):
"""Ancillary routine to process a type"""
# Strip newlines/cr's.
line = Re(r'[\r\n]+', re.S).sub(' ', line)
# Strip leading spaces
line = Re(r'^\s+', re.S).sub('', line)
# Strip trailing spaces
line = Re(r'\s+$', re.S).sub('', line)
# Strip C99-style comments to the end of the line
line = Re(r"\/\/.*$", re.S).sub('', line)
# To distinguish preprocessor directive from regular declaration later.
if line.startswith('#'):
line += ";"
r = Re(r'([^\{\};]*)([\{\};])(.*)')
while True:
if r.search(line):
if self.entry.prototype:
self.entry.prototype += " "
self.entry.prototype += r.group(1) + r.group(2)
self.entry.brcount += r.group(2).count('{')
self.entry.brcount -= r.group(2).count('}')
self.entry.brcount = max(self.entry.brcount, 0)
if r.group(2) == ';' and self.entry.brcount == 0:
self.dump_declaration(ln, self.entry.prototype)
self.reset_state(ln)
break
line = r.group(3)
else:
self.entry.prototype += line
break
def process_proto(self, ln, line):
"""STATE_PROTO: reading a function/whatever prototype."""
if doc_inline_oneline.search(line):
self.entry.section = doc_inline_oneline.group(1)
self.entry.contents = doc_inline_oneline.group(2)
if self.entry.contents != "":
self.entry.contents += "\n"
self.dump_section(start_new=False)
elif doc_inline_start.search(line):
self.state = self.STATE_INLINE
self.inline_doc_state = self.STATE_INLINE_NAME
elif self.entry.decl_type == 'function':
self.process_proto_function(ln, line)
else:
self.process_proto_type(ln, line)
def process_docblock(self, ln, line):
"""STATE_DOCBLOCK: within a DOC: block."""
if doc_end.search(line):
self.dump_section()
self.output_declaration("doc", None,
sectionlist=self.entry.sectionlist,
sections=self.entry.sections, module=self.config.modulename)
self.reset_state(ln)
elif doc_content.search(line):
self.entry.contents += doc_content.group(1) + "\n"
def run(self):
"""
Open and process each line of a C source file.
he parsing is controlled via a state machine, and the line is passed
to a different process function depending on the state. The process
function may update the state as needed.
"""
cont = False
prev = ""
prev_ln = None
try:
with open(self.fname, "r", encoding="utf8",
errors="backslashreplace") as fp:
for ln, line in enumerate(fp):
line = line.expandtabs().strip("\n")
# Group continuation lines on prototypes
if self.state == self.STATE_PROTO:
if line.endswith("\\"):
prev += line.removesuffix("\\")
cont = True
if not prev_ln:
prev_ln = ln
continue
if cont:
ln = prev_ln
line = prev + line
prev = ""
cont = False
prev_ln = None
self.config.log.debug("%d %s%s: %s",
ln, self.st_name[self.state],
self.st_inline_name[self.inline_doc_state],
line)
# TODO: not all states allow EXPORT_SYMBOL*, so this
# can be optimized later on to speedup parsing
self.process_export(self.config.function_table, line)
# Hand this line to the appropriate state handler
if self.state == self.STATE_NORMAL:
self.process_normal(ln, line)
elif self.state == self.STATE_NAME:
self.process_name(ln, line)
elif self.state in [self.STATE_BODY, self.STATE_BODY_MAYBE,
self.STATE_BODY_WITH_BLANK_LINE]:
self.process_body(ln, line)
elif self.state == self.STATE_INLINE: # scanning for inline parameters
self.process_inline(ln, line)
elif self.state == self.STATE_PROTO:
self.process_proto(ln, line)
elif self.state == self.STATE_DOCBLOCK:
self.process_docblock(ln, line)
except OSError:
self.config.log.error(f"Error: Cannot open file {self.fname}")
self.config.errors += 1
class GlobSourceFiles:
"""
Parse C source code file names and directories via an Interactor.
"""
def __init__(self, srctree=None, valid_extensions=None):
"""
Initialize valid extensions with a tuple.
If not defined, assume default C extensions (.c and .h)
It would be possible to use python's glob function, but it is
very slow, and it is not interactive. So, it would wait to read all
directories before actually do something.
So, let's use our own implementation.
"""
if not valid_extensions:
self.extensions = (".c", ".h")
else:
self.extensions = valid_extensions
self.srctree = srctree
def _parse_dir(self, dirname):
"""Internal function to parse files recursively"""
with os.scandir(dirname) as obj:
for entry in obj:
name = os.path.join(dirname, entry.name)
if entry.is_dir():
yield from self._parse_dir(name)
if not entry.is_file():
continue
basename = os.path.basename(name)
if not basename.endswith(self.extensions):
continue
yield name
def parse_files(self, file_list, file_not_found_cb):
for fname in file_list:
if self.srctree:
f = os.path.join(self.srctree, fname)
else:
f = fname
if os.path.isdir(f):
yield from self._parse_dir(f)
elif os.path.isfile(f):
yield f
elif file_not_found_cb:
file_not_found_cb(fname)
class KernelFiles():
def parse_file(self, fname):
doc = KernelDoc(self.config, fname)
doc.run()
return doc
def process_export_file(self, fname):
try:
with open(fname, "r", encoding="utf8",
errors="backslashreplace") as fp:
for line in fp:
KernelDoc.process_export(self.config.function_table, line)
except IOError:
print(f"Error: Cannot open fname {fname}", fname=sys.stderr)
self.config.errors += 1
def file_not_found_cb(self, fname):
self.config.log.error("Cannot find file %s", fname)
self.config.errors += 1
def __init__(self, files=None, verbose=False, out_style=None,
werror=False, wreturn=False, wshort_desc=False,
wcontents_before_sections=False,
logger=None, modulename=None, export_file=None):
"""Initialize startup variables and parse all files"""
if not verbose:
verbose = bool(os.environ.get("KBUILD_VERBOSE", 0))
if not modulename:
modulename = "Kernel API"
dt = datetime.now()
if os.environ.get("KBUILD_BUILD_TIMESTAMP", None):
# use UTC TZ
to_zone = tz.gettz('UTC')
dt = dt.astimezone(to_zone)
if not werror:
kcflags = os.environ.get("KCFLAGS", None)
if kcflags:
match = re.search(r"(\s|^)-Werror(\s|$)/", kcflags)
if match:
werror = True
# reading this variable is for backwards compat just in case
# someone was calling it with the variable from outside the
# kernel's build system
kdoc_werror = os.environ.get("KDOC_WERROR", None)
if kdoc_werror:
werror = kdoc_werror
# Set global config data used on all files
self.config = argparse.Namespace
self.config.verbose = verbose
self.config.werror = werror
self.config.wreturn = wreturn
self.config.wshort_desc = wshort_desc
self.config.wcontents_before_sections = wcontents_before_sections
self.config.modulename = modulename
self.config.function_table = set()
self.config.source_map = {}
if not logger:
self.config.log = logging.getLogger("kernel-doc")
else:
self.config.log = logger
self.config.kernel_version = os.environ.get("KERNELVERSION",
"unknown kernel version'")
self.config.src_tree = os.environ.get("SRCTREE", None)
self.out_style = out_style
self.export_file = export_file
# Initialize internal variables
self.config.errors = 0
self.results = []
self.file_list = files
self.files = set()
def parse(self):
"""
Parse all files
"""
glob = GlobSourceFiles(srctree=self.config.src_tree)
# Let's use a set here to avoid duplicating files
for fname in glob.parse_files(self.file_list, self.file_not_found_cb):
if fname in self.files:
continue
self.files.add(fname)
res = self.parse_file(fname)
self.results.append((res.fname, res.entries))
if not self.files:
sys.exit(1)
# If a list of export files was provided, parse EXPORT_SYMBOL*
# from the ones not already parsed
if self.export_file:
files = self.files
glob = GlobSourceFiles(srctree=self.config.src_tree)
for fname in glob.parse_files(self.export_file,
self.file_not_found_cb):
if fname not in files:
files.add(fname)
self.process_export_file(fname)
def out_msg(self, fname, name, arg):
# TODO: filter out unwanted parts
return self.out_style.msg(fname, name, arg)
def msg(self, enable_lineno=False, export=False, internal=False,
symbol=None, nosymbol=None):
function_table = self.config.function_table
if symbol:
for s in symbol:
function_table.add(s)
# Output none mode: only warnings will be shown
if not self.out_style:
return
self.out_style.set_config(self.config)
self.out_style.set_filter(export, internal, symbol, nosymbol,
function_table, enable_lineno)
for fname, arg_tuple in self.results:
for name, arg in arg_tuple:
if self.out_msg(fname, name, arg):
ln = arg.get("ln", 0)
dtype = arg.get('type', "")
self.config.log.warning("%s:%d Can't handle %s",
fname, ln, dtype)
class OutputFormat:
# output mode.
OUTPUT_ALL = 0 # output all symbols and doc sections
OUTPUT_INCLUDE = 1 # output only specified symbols
OUTPUT_EXPORTED = 2 # output exported symbols
OUTPUT_INTERNAL = 3 # output non-exported symbols
# Virtual member to be overriden at the inherited classes
highlights = []
def __init__(self):
"""Declare internal vars and set mode to OUTPUT_ALL"""
self.out_mode = self.OUTPUT_ALL
self.enable_lineno = None
self.nosymbol = {}
self.symbol = None
self.function_table = set()
self.config = None
def set_config(self, config):
self.config = config
def set_filter(self, export, internal, symbol, nosymbol, function_table,
enable_lineno):
"""
Initialize filter variables according with the requested mode.
Only one choice is valid between export, internal and symbol.
The nosymbol filter can be used on all modes.
"""
self.enable_lineno = enable_lineno
if symbol:
self.out_mode = self.OUTPUT_INCLUDE
function_table = symbol
elif export:
self.out_mode = self.OUTPUT_EXPORTED
elif internal:
self.out_mode = self.OUTPUT_INTERNAL
else:
self.out_mode = self.OUTPUT_ALL
if nosymbol:
self.nosymbol = set(nosymbol)
if function_table:
self.function_table = function_table
def highlight_block(self, block):
"""
Apply the RST highlights to a sub-block of text.
"""
for r, sub in self.highlights:
block = r.sub(sub, block)
return block
def check_doc(self, name):
"""Check if DOC should be output"""
if self.out_mode == self.OUTPUT_ALL:
return True
if self.out_mode == self.OUTPUT_INCLUDE:
if name in self.nosymbol:
return False
if name in self.function_table:
return True
return False
def check_declaration(self, dtype, name):
if name in self.nosymbol:
return False
if self.out_mode == self.OUTPUT_ALL:
return True
if self.out_mode in [ self.OUTPUT_INCLUDE, self.OUTPUT_EXPORTED ]:
if name in self.function_table:
return True
if self.out_mode == self.OUTPUT_INTERNAL:
if dtype != "function":
return True
if name not in self.function_table:
return True
return False
def check_function(self, fname, name, args):
return True
def check_enum(self, fname, name, args):
return True
def check_typedef(self, fname, name, args):
return True
def msg(self, fname, name, args):
dtype = args.get('type', "")
if dtype == "doc":
self.out_doc(fname, name, args)
return False
if not self.check_declaration(dtype, name):
return False
if dtype == "function":
self.out_function(fname, name, args)
return False
if dtype == "enum":
self.out_enum(fname, name, args)
return False
if dtype == "typedef":
self.out_typedef(fname, name, args)
return False
if dtype in ["struct", "union"]:
self.out_struct(fname, name, args)
return False
# Warn if some type requires an output logic
self.config.log.warning("doesn't now how to output '%s' block",
dtype)
return True
# Virtual methods to be overridden by inherited classes
def out_doc(self, fname, name, args):
pass
def out_function(self, fname, name, args):
pass
def out_enum(self, fname, name, args):
pass
def out_typedef(self, fname, name, args):
pass
def out_struct(self, fname, name, args):
pass
class RestFormat(OutputFormat):
# """Consts and functions used by ReST output"""
highlights = [
(type_constant, r"``\1``"),
(type_constant2, r"``\1``"),
# Note: need to escape () to avoid func matching later
(type_member_func, r":c:type:`\1\2\3\\(\\) <\1>`"),
(type_member, r":c:type:`\1\2\3 <\1>`"),
(type_fp_param, r"**\1\\(\\)**"),
(type_fp_param2, r"**\1\\(\\)**"),
(type_func, r"\1()"),
(type_enum, r":c:type:`\1 <\2>`"),
(type_struct, r":c:type:`\1 <\2>`"),
(type_typedef, r":c:type:`\1 <\2>`"),
(type_union, r":c:type:`\1 <\2>`"),
# in rst this can refer to any type
(type_fallback, r":c:type:`\1`"),
(type_param_ref, r"**\1\2**")
]
blankline = "\n"
sphinx_literal = Re(r'^[^.].*::$', cache=False)
sphinx_cblock = Re(r'^\.\.\ +code-block::', cache=False)
def __init__(self):
"""
Creates class variables.
Not really mandatory, but it is a good coding style and makes
pylint happy.
"""
super().__init__()
self.lineprefix = ""
def print_lineno (self, ln):
"""Outputs a line number"""
if self.enable_lineno and ln:
print(f".. LINENO {ln}")
def output_highlight(self, args):
input_text = args
output = ""
in_literal = False
litprefix = ""
block = ""
for line in input_text.strip("\n").split("\n"):
# If we're in a literal block, see if we should drop out of it.
# Otherwise, pass the line straight through unmunged.
if in_literal:
if line.strip(): # If the line is not blank
# If this is the first non-blank line in a literal block,
# figure out the proper indent.
if not litprefix:
r = Re(r'^(\s*)')
if r.match(line):
litprefix = '^' + r.group(1)
else:
litprefix = ""
output += line + "\n"
elif not Re(litprefix).match(line):
in_literal = False
else:
output += line + "\n"
else:
output += line + "\n"
# Not in a literal block (or just dropped out)
if not in_literal:
block += line + "\n"
if self.sphinx_literal.match(line) or self.sphinx_cblock.match(line):
in_literal = True
litprefix = ""
output += self.highlight_block(block)
block = ""
# Handle any remaining block
if block:
output += self.highlight_block(block)
# Print the output with the line prefix
for line in output.strip("\n").split("\n"):
print(self.lineprefix + line)
def out_section(self, args, out_reference=False):
"""
Outputs a block section.
This could use some work; it's used to output the DOC: sections, and
starts by putting out the name of the doc section itself, but that
tends to duplicate a header already in the template file.
"""
sectionlist = args.get('sectionlist', [])
sections = args.get('sections', {})
section_start_lines = args.get('section_start_lines', {})
for section in sectionlist:
# Skip sections that are in the nosymbol_table
if section in self.nosymbol:
continue
if not self.out_mode == self.OUTPUT_INCLUDE:
if out_reference:
print(f".. _{section}:\n")
if not self.symbol:
print(f'{self.lineprefix}**{section}**\n')
self.print_lineno(section_start_lines.get(section, 0))
self.output_highlight(sections[section])
print()
print()
def out_doc(self, fname, name, args):
if not self.check_doc(name):
return
self.out_section(args, out_reference=True)
def out_function(self, fname, name, args):
oldprefix = self.lineprefix
signature = ""
func_macro = args.get('func_macro', False)
if func_macro:
signature = args['function']
else:
if args.get('functiontype'):
signature = args['functiontype'] + " "
signature += args['function'] + " ("
parameterlist = args.get('parameterlist', [])
parameterdescs = args.get('parameterdescs', {})
parameterdesc_start_lines = args.get('parameterdesc_start_lines', {})
ln = args.get('ln', 0)
count = 0
for parameter in parameterlist:
if count != 0:
signature += ", "
count += 1
dtype = args['parametertypes'].get(parameter, "")
if function_pointer.search(dtype):
signature += function_pointer.group(1) + parameter + function_pointer.group(3)
else:
signature += dtype
if not func_macro:
signature += ")"
if args.get('typedef') or not args.get('functiontype'):
print(f".. c:macro:: {args['function']}\n")
if args.get('typedef'):
self.print_lineno(ln)
print(" **Typedef**: ", end="")
self.lineprefix = ""
self.output_highlight(args.get('purpose', ""))
print("\n\n**Syntax**\n")
print(f" ``{signature}``\n")
else:
print(f"``{signature}``\n")
else:
print(f".. c:function:: {signature}\n")
if not args.get('typedef'):
self.print_lineno(ln)
self.lineprefix = " "
self.output_highlight(args.get('purpose', ""))
print()
# Put descriptive text into a container (HTML <div>) to help set
# function prototypes apart
self.lineprefix = " "
if parameterlist:
print(".. container:: kernelindent\n")
print(f"{self.lineprefix}**Parameters**\n")
for parameter in parameterlist:
parameter_name = Re(r'\[.*').sub('', parameter)
dtype = args['parametertypes'].get(parameter, "")
if dtype:
print(f"{self.lineprefix}``{dtype}``")
else:
print(f"{self.lineprefix}``{parameter}``")
self.print_lineno(parameterdesc_start_lines.get(parameter_name, 0))
self.lineprefix = " "
if parameter_name in parameterdescs and \
parameterdescs[parameter_name] != KernelDoc.undescribed:
self.output_highlight(parameterdescs[parameter_name])
print()
else:
print(f"{self.lineprefix}*undescribed*\n")
self.lineprefix = " "
self.out_section(args)
self.lineprefix = oldprefix
def out_enum(self, fname, name, args):
oldprefix = self.lineprefix
name = args.get('enum', '')
parameterlist = args.get('parameterlist', [])
parameterdescs = args.get('parameterdescs', {})
ln = args.get('ln', 0)
print(f"\n\n.. c:enum:: {name}\n")
self.print_lineno(ln)
self.lineprefix = " "
self.output_highlight(args.get('purpose', ''))
print()
print(".. container:: kernelindent\n")
outer = self.lineprefix + " "
self.lineprefix = outer + " "
print(f"{outer}**Constants**\n")
for parameter in parameterlist:
print(f"{outer}``{parameter}``")
if parameterdescs.get(parameter, '') != KernelDoc.undescribed:
self.output_highlight(parameterdescs[parameter])
else:
print(f"{self.lineprefix}*undescribed*\n")
print()
self.lineprefix = oldprefix
self.out_section(args)
def out_typedef(self, fname, name, args):
oldprefix = self.lineprefix
name = args.get('typedef', '')
ln = args.get('ln', 0)
print(f"\n\n.. c:type:: {name}\n")
self.print_lineno(ln)
self.lineprefix = " "
self.output_highlight(args.get('purpose', ''))
print()
self.lineprefix = oldprefix
self.out_section(args)
def out_struct(self, fname, name, args):
name = args.get('struct', "")
purpose = args.get('purpose', "")
declaration = args.get('definition', "")
dtype = args.get('type', "struct")
ln = args.get('ln', 0)
parameterlist = args.get('parameterlist', [])
parameterdescs = args.get('parameterdescs', {})
parameterdesc_start_lines = args.get('parameterdesc_start_lines', {})
print(f"\n\n.. c:{dtype}:: {name}\n")
self.print_lineno(ln)
oldprefix = self.lineprefix
self.lineprefix += " "
self.output_highlight(purpose)
print()
print(".. container:: kernelindent\n")
print(f"{self.lineprefix}**Definition**::\n")
self.lineprefix = self.lineprefix + " "
declaration = declaration.replace("\t", self.lineprefix)
print(f"{self.lineprefix}{dtype} {name}" + ' {')
print(f"{declaration}{self.lineprefix}" + "};\n")
self.lineprefix = " "
print(f"{self.lineprefix}**Members**\n")
for parameter in parameterlist:
if not parameter or parameter.startswith("#"):
continue
parameter_name = parameter.split("[", maxsplit=1)[0]
if parameterdescs.get(parameter_name) == KernelDoc.undescribed:
continue
self.print_lineno(parameterdesc_start_lines.get(parameter_name, 0))
print(f"{self.lineprefix}``{parameter}``")
self.lineprefix = " "
self.output_highlight(parameterdescs[parameter_name])
self.lineprefix = " "
print()
print()
self.lineprefix = oldprefix
self.out_section(args)
class ManFormat(OutputFormat):
"""Consts and functions used by man pages output"""
highlights = (
(type_constant, r"\1"),
(type_constant2, r"\1"),
(type_func, r"\\fB\1\\fP"),
(type_enum, r"\\fI\1\\fP"),
(type_struct, r"\\fI\1\\fP"),
(type_typedef, r"\\fI\1\\fP"),
(type_union, r"\\fI\1\\fP"),
(type_param, r"\\fI\1\\fP"),
(type_param_ref, r"\\fI\1\2\\fP"),
(type_member, r"\\fI\1\2\3\\fP"),
(type_fallback, r"\\fI\1\\fP")
)
blankline = ""
def __init__(self):
"""
Creates class variables.
Not really mandatory, but it is a good coding style and makes
pylint happy.
"""
super().__init__()
dt = datetime.now()
if os.environ.get("KBUILD_BUILD_TIMESTAMP", None):
# use UTC TZ
to_zone = tz.gettz('UTC')
dt = dt.astimezone(to_zone)
self.man_date = dt.strftime("%B %Y")
def output_highlight(self, block):
contents = self.highlight_block(block)
if isinstance(contents, list):
contents = "\n".join(contents)
for line in contents.strip("\n").split("\n"):
line = Re(r"^\s*").sub("", line)
if line and line[0] == ".":
print("\\&" + line)
else:
print(line)
def out_doc(self, fname, name, args):
module = args.get('module')
sectionlist = args.get('sectionlist', [])
sections = args.get('sections', {})
print(f'.TH "{module}" 9 "{module}" "{self.man_date}" "API Manual" LINUX')
for section in sectionlist:
print(f'.SH "{section}"')
self.output_highlight(sections.get(section))
def out_function(self, fname, name, args):
"""output function in man"""
parameterlist = args.get('parameterlist', [])
parameterdescs = args.get('parameterdescs', {})
sectionlist = args.get('sectionlist', [])
sections = args.get('sections', {})
print(f'.TH "{args['function']}" 9 "{args['function']}" "{self.man_date}" "Kernel Hacker\'s Manual" LINUX')
print(".SH NAME")
print(f"{args['function']} \\- {args['purpose']}")
print(".SH SYNOPSIS")
if args.get('functiontype', ''):
print(f'.B "{args['functiontype']}" {args['function']}')
else:
print(f'.B "{args['function']}')
count = 0
parenth = "("
post = ","
for parameter in parameterlist:
if count == len(parameterlist) - 1:
post = ");"
dtype = args['parametertypes'].get(parameter, "")
if function_pointer.match(dtype):
# Pointer-to-function
print(f'".BI "{parenth}{function_pointer.group(1)}" " ") ({function_pointer.group(2)}){post}"')
else:
dtype = Re(r'([^\*])$').sub(r'\1 ', dtype)
print(f'.BI "{parenth}{dtype}" "{post}"')
count += 1
parenth = ""
if parameterlist:
print(".SH ARGUMENTS")
for parameter in parameterlist:
parameter_name = re.sub(r'\[.*', '', parameter)
print(f'.IP "{parameter}" 12')
self.output_highlight(parameterdescs.get(parameter_name, ""))
for section in sectionlist:
print(f'.SH "{section.upper()}"')
self.output_highlight(sections[section])
def out_enum(self, fname, name, args):
name = args.get('enum', '')
parameterlist = args.get('parameterlist', [])
sectionlist = args.get('sectionlist', [])
sections = args.get('sections', {})
print(f'.TH "{args['module']}" 9 "enum {args['enum']}" "{self.man_date}" "API Manual" LINUX')
print(".SH NAME")
print(f"enum {args['enum']} \\- {args['purpose']}")
print(".SH SYNOPSIS")
print(f"enum {args['enum']}" + " {")
count = 0
for parameter in parameterlist:
print(f'.br\n.BI " {parameter}"')
if count == len(parameterlist) - 1:
print("\n};")
else:
print(", \n.br")
count += 1
print(".SH Constants")
for parameter in parameterlist:
parameter_name = Re(r'\[.*').sub('', parameter)
print(f'.IP "{parameter}" 12')
self.output_highlight(args['parameterdescs'].get(parameter_name, ""))
for section in sectionlist:
print(f'.SH "{section}"')
self.output_highlight(sections[section])
def out_typedef(self, fname, name, args):
module = args.get('module')
typedef = args.get('typedef')
purpose = args.get('purpose')
sectionlist = args.get('sectionlist', [])
sections = args.get('sections', {})
print(f'.TH "{module}" 9 "{typedef}" "{self.man_date}" "API Manual" LINUX')
print(".SH NAME")
print(f"typedef {typedef} \\- {purpose}")
for section in sectionlist:
print(f'.SH "{section}"')
self.output_highlight(sections.get(section))
def out_struct(self, fname, name, args):
module = args.get('module')
struct_type = args.get('type')
struct_name = args.get('struct')
purpose = args.get('purpose')
definition = args.get('definition')
sectionlist = args.get('sectionlist', [])
parameterlist = args.get('parameterlist', [])
sections = args.get('sections', {})
parameterdescs = args.get('parameterdescs', {})
print(f'.TH "{module}" 9 "{struct_type} {struct_name}" "{self.man_date}" "API Manual" LINUX')
print(".SH NAME")
print(f"{struct_type} {struct_name} \\- {purpose}")
# Replace tabs with two spaces and handle newlines
declaration = definition.replace("\t", " ")
declaration = Re(r"\n").sub('"\n.br\n.BI "', declaration)
print(".SH SYNOPSIS")
print(f"{struct_type} {struct_name} " + "{" +"\n.br")
print(f'.BI "{declaration}\n' + "};\n.br\n")
print(".SH Members")
for parameter in parameterlist:
if parameter.startswith("#"):
continue
parameter_name = re.sub(r"\[.*", "", parameter)
if parameterdescs.get(parameter_name) == KernelDoc.undescribed:
continue
print(f'.IP "{parameter}" 12')
self.output_highlight(parameterdescs.get(parameter_name))
for section in sectionlist:
print(f'.SH "{section}"')
self.output_highlight(sections.get(section))
# Command line interface
DESC = """
Read C language source or header FILEs, extract embedded documentation comments,
and print formatted documentation to standard output.
The documentation comments are identified by the "/**" opening comment mark.
See Documentation/doc-guide/kernel-doc.rst for the documentation comment syntax.
"""
EXPORT_FILE_DESC = """
Specify an additional FILE in which to look for EXPORT_SYMBOL information.
May be used multiple times.
"""
EXPORT_DESC = """
Only output documentation for the symbols that have been
exported using EXPORT_SYMBOL() and related macros in any input
FILE or -export-file FILE.
"""
INTERNAL_DESC = """
Only output documentation for the symbols that have NOT been
exported using EXPORT_SYMBOL() and related macros in any input
FILE or -export-file FILE.
"""
FUNCTION_DESC = """
Only output documentation for the given function or DOC: section
title. All other functions and DOC: sections are ignored.
May be used multiple times.
"""
NOSYMBOL_DESC = """
Exclude the specified symbol from the output documentation.
May be used multiple times.
"""
FILES_DESC = """
Header and C source files to be parsed.
"""
WARN_CONTENTS_BEFORE_SECTIONS_DESC = """
Warns if there are contents before sections (deprecated).
This option is kept just for backward-compatibility, but it does nothing,
neither here nor at the original Perl script.
"""
class MsgFormatter(logging.Formatter):
def format(self, record):
record.levelname = record.levelname.capitalize()
return logging.Formatter.format(self, record)
def main():
"""Main program"""
parser = argparse.ArgumentParser(formatter_class=argparse.RawTextHelpFormatter,
description=DESC)
# Normal arguments
parser.add_argument("-v", "-verbose", "--verbose", action="store_true",
help="Verbose output, more warnings and other information.")
parser.add_argument("-d", "-debug", "--debug", action="store_true",
help="Enable debug messages")
parser.add_argument("-M", "-modulename", "--modulename",
help="Allow setting a module name at the output.")
parser.add_argument("-l", "-enable-lineno", "--enable_lineno",
action="store_true",
help="Enable line number output (only in ReST mode)")
# Arguments to control the warning behavior
parser.add_argument("-Wreturn", "--wreturn", action="store_true",
help="Warns about the lack of a return markup on functions.")
parser.add_argument("-Wshort-desc", "-Wshort-description", "--wshort-desc",
action="store_true",
help="Warns if initial short description is missing")
parser.add_argument("-Wcontents-before-sections",
"--wcontents-before-sections", action="store_true",
help=WARN_CONTENTS_BEFORE_SECTIONS_DESC)
parser.add_argument("-Wall", "--wall", action="store_true",
help="Enable all types of warnings")
parser.add_argument("-Werror", "--werror", action="store_true",
help="Treat warnings as errors.")
parser.add_argument("-export-file", "--export-file", action='append',
help=EXPORT_FILE_DESC)
# Output format mutually-exclusive group
out_group = parser.add_argument_group("Output format selection (mutually exclusive)")
out_fmt = out_group.add_mutually_exclusive_group()
out_fmt.add_argument("-m", "-man", "--man", action="store_true",
help="Output troff manual page format.")
out_fmt.add_argument("-r", "-rst", "--rst", action="store_true",
help="Output reStructuredText format (default).")
out_fmt.add_argument("-N", "-none", "--none", action="store_true",
help="Do not output documentation, only warnings.")
# Output selection mutually-exclusive group
sel_group = parser.add_argument_group("Output selection (mutually exclusive)")
sel_mut = sel_group.add_mutually_exclusive_group()
sel_mut.add_argument("-e", "-export", "--export", action='store_true',
help=EXPORT_DESC)
sel_mut.add_argument("-i", "-internal", "--internal", action='store_true',
help=INTERNAL_DESC)
sel_mut.add_argument("-s", "-function", "--symbol", action='append',
help=FUNCTION_DESC)
# This one is valid for all 3 types of filter
parser.add_argument("-n", "-nosymbol", "--nosymbol", action='append',
help=NOSYMBOL_DESC)
parser.add_argument("files", metavar="FILE",
nargs="+", help=FILES_DESC)
args = parser.parse_args()
if args.wall:
args.wreturn = True
args.wshort_desc = True
args.wcontents_before_sections = True
logger = logging.getLogger()
if not args.debug:
logger.setLevel(logging.INFO)
else:
logger.setLevel(logging.DEBUG)
formatter = MsgFormatter('%(levelname)s: %(message)s')
handler = logging.StreamHandler()
handler.setFormatter(formatter)
logger.addHandler(handler)
if args.man:
out_style = ManFormat()
elif args.none:
out_style = None
else:
out_style = RestFormat()
kfiles = KernelFiles(files=args.files, verbose=args.verbose,
out_style=out_style, werror=args.werror,
wreturn=args.wreturn, wshort_desc=args.wshort_desc,
wcontents_before_sections=args.wcontents_before_sections,
modulename=args.modulename,
export_file=args.export_file)
kfiles.parse()
kfiles.msg(enable_lineno=args.enable_lineno, export=args.export,
internal=args.internal, symbol=args.symbol,
nosymbol=args.nosymbol)
# Call main method
if __name__ == "__main__":
main()
Reference in a new issue View git blame Copy permalink