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Diffstat (limited to 'scripts/lib/kdoc/kdoc_parser.py')
| -rw-r--r-- | scripts/lib/kdoc/kdoc_parser.py | 1745 |
1 files changed, 1745 insertions, 0 deletions
diff --git a/scripts/lib/kdoc/kdoc_parser.py b/scripts/lib/kdoc/kdoc_parser.py new file mode 100644 index 000000000000..062453eefc7a --- /dev/null +++ b/scripts/lib/kdoc/kdoc_parser.py @@ -0,0 +1,1745 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 +# Copyright(c) 2025: Mauro Carvalho Chehab <mchehab@kernel.org>. +# +# pylint: disable=C0301,C0302,R0904,R0912,R0913,R0914,R0915,R0917,R1702 + +""" +kdoc_parser +=========== + +Read a C language source or header FILE and extract embedded +documentation comments +""" + +import re +from pprint import pformat + +from kdoc_re import NestedMatch, KernRe + + +# +# 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 = KernRe(r'^/\*\*\s*$', cache=False) + +doc_end = KernRe(r'\*/', cache=False) +doc_com = KernRe(r'\s*\*\s*', cache=False) +doc_com_body = KernRe(r'\s*\* ?', cache=False) +doc_decl = doc_com + KernRe(r'(\w+)', cache=False) + +# @params and a strictly limited set of supported section names +# Specifically: +# Match @word: +# @...: +# @{section-name}: +# while trying to not match literal block starts like "example::" +# +doc_sect = doc_com + \ + KernRe(r'\s*(\@[.\w]+|\@\.\.\.|description|context|returns?|notes?|examples?)\s*:([^:].*)?$', + flags=re.I, cache=False) + +doc_content = doc_com_body + KernRe(r'(.*)', cache=False) +doc_block = doc_com + KernRe(r'DOC:\s*(.*)?', cache=False) +doc_inline_start = KernRe(r'^\s*/\*\*\s*$', cache=False) +doc_inline_sect = KernRe(r'\s*\*\s*(@\s*[\w][\w\.]*\s*):(.*)', cache=False) +doc_inline_end = KernRe(r'^\s*\*/\s*$', cache=False) +doc_inline_oneline = KernRe(r'^\s*/\*\*\s*(@[\w\s]+):\s*(.*)\s*\*/\s*$', cache=False) +attribute = KernRe(r"__attribute__\s*\(\([a-z0-9,_\*\s\(\)]*\)\)", + flags=re.I | re.S, cache=False) + +export_symbol = KernRe(r'^\s*EXPORT_SYMBOL(_GPL)?\s*\(\s*(\w+)\s*\)\s*', cache=False) +export_symbol_ns = KernRe(r'^\s*EXPORT_SYMBOL_NS(_GPL)?\s*\(\s*(\w+)\s*,\s*"\S+"\)\s*', cache=False) + +type_param = KernRe(r"\@(\w*((\.\w+)|(->\w+))*(\.\.\.)?)", cache=False) + +class state: + """ + State machine enums + """ + + # Parser states + NORMAL = 0 # normal code + NAME = 1 # looking for function name + BODY_MAYBE = 2 # body - or maybe more description + BODY = 3 # the body of the comment + BODY_WITH_BLANK_LINE = 4 # the body which has a blank line + PROTO = 5 # scanning prototype + DOCBLOCK = 6 # documentation block + INLINE = 7 # gathering doc outside main block + + name = [ + "NORMAL", + "NAME", + "BODY_MAYBE", + "BODY", + "BODY_WITH_BLANK_LINE", + "PROTO", + "DOCBLOCK", + "INLINE", + ] + + # Inline documentation state + INLINE_NA = 0 # not applicable ($state != INLINE) + INLINE_NAME = 1 # looking for member name (@foo:) + INLINE_TEXT = 2 # looking for member documentation + INLINE_END = 3 # done + INLINE_ERROR = 4 # error - Comment without header was found. + # Spit a warning as it's not + # proper kernel-doc and ignore the rest. + + inline_name = [ + "", + "_NAME", + "_TEXT", + "_END", + "_ERROR", + ] + +SECTION_DEFAULT = "Description" # default section + +class KernelEntry: + + def __init__(self, config, ln): + self.config = config + + self.contents = "" + self.function = "" + self.sectcheck = "" + self.struct_actual = "" + self.prototype = "" + + self.warnings = [] + + self.parameterlist = [] + self.parameterdescs = {} + self.parametertypes = {} + self.parameterdesc_start_lines = {} + + self.section_start_lines = {} + self.sectionlist = [] + self.sections = {} + + self.anon_struct_union = False + + self.leading_space = None + + # State flags + self.brcount = 0 + + self.in_doc_sect = False + self.declaration_start_line = ln + 1 + + # TODO: rename to emit_message after removal of kernel-doc.pl + def emit_msg(self, log_msg, warning=True): + """Emit a message""" + + if not warning: + self.config.log.info(log_msg) + return + + # Delegate warning output to output logic, as this way it + # will report warnings/info only for symbols that are output + + self.warnings.append(log_msg) + return + + def dump_section(self, start_new=True): + """ + Dumps section contents to arrays/hashes intended for that purpose. + """ + + name = self.section + contents = self.contents + + if type_param.match(name): + name = type_param.group(1) + + self.parameterdescs[name] = contents + self.parameterdesc_start_lines[name] = self.new_start_line + + self.sectcheck += name + " " + self.new_start_line = 0 + + elif name == "@...": + name = "..." + self.parameterdescs[name] = contents + self.sectcheck += name + " " + self.parameterdesc_start_lines[name] = self.new_start_line + self.new_start_line = 0 + + else: + if name in self.sections and self.sections[name] != "": + # Only warn on user-specified duplicate section names + if name != SECTION_DEFAULT: + self.emit_msg(self.new_start_line, + f"duplicate section name '{name}'\n") + self.sections[name] += contents + else: + self.sections[name] = contents + self.sectionlist.append(name) + self.section_start_lines[name] = self.new_start_line + self.new_start_line = 0 + +# self.config.log.debug("Section: %s : %s", name, pformat(vars(self))) + + if start_new: + self.section = SECTION_DEFAULT + self.contents = "" + + +class KernelDoc: + """ + Read a C language source or header FILE and extract embedded + documentation comments. + """ + + # Section names + + 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 = state.NORMAL + self.inline_doc_state = state.INLINE_NA + + # Store entry currently being processed + self.entry = None + + # Place all potential outputs into an array + self.entries = [] + + def emit_msg(self, ln, msg, warning=True): + """Emit a message""" + + log_msg = f"{self.fname}:{ln} {msg}" + + if self.entry: + self.entry.emit_msg(log_msg, warning) + return + + if warning: + self.config.log.warning(log_msg) + else: + self.config.log.info(log_msg) + + def dump_section(self, start_new=True): + """ + Dumps section contents to arrays/hashes intended for that purpose. + """ + + if self.entry: + self.entry.dump_section(start_new) + + # TODO: rename it to store_declaration after removal of kernel-doc.pl + 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 + + args["declaration_start_line"] = self.entry.declaration_start_line + args["type"] = dtype + args["warnings"] = self.entry.warnings + + # TODO: use colletions.OrderedDict to remove sectionlist + + sections = args.get('sections', {}) + sectionlist = args.get('sectionlist', []) + + # Drop empty sections + # TODO: improve empty sections logic 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 = KernelEntry(self.config, ln) + + # State flags + self.state = state.NORMAL + self.inline_doc_state = state.INLINE_NA + + def push_parameter(self, ln, decl_type, param, dtype, + org_arg, declaration_name): + """ + Store parameters and their descriptions at self.entry. + """ + + 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 = KernRe(r'[\[\)].*').sub('', param, count=1) + + if dtype == "" and param.endswith("..."): + if KernRe(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 "." not in param: + if decl_type == 'function': + dname = f"{decl_type} parameter" + else: + dname = f"{decl_type} member" + + self.emit_msg(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 = KernRe(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 = KernRe(r'\s*').sub("", actual, count=1) + + self.entry.struct_actual += actual + " " + + def create_parameter_list(self, ln, decl_type, args, + splitter, declaration_name): + """ + Creates a list of parameters, storing them at self.entry. + """ + + # temporarily replace all commas inside function pointer definition + arg_expr = KernRe(r'(\([^\),]+),') + while arg_expr.search(args): + args = arg_expr.sub(r"\1#", args) + + for arg in args.split(splitter): + # Strip comments + arg = KernRe(r'\/\*.*\*\/').sub('', arg) + + # Ignore argument attributes + arg = KernRe(r'\sPOS0?\s').sub(' ', arg) + + # Strip leading/trailing spaces + arg = arg.strip() + arg = KernRe(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 KernRe(r'\(.+\)\s*\(').search(arg): + # Pointer-to-function + + arg = arg.replace('#', ',') + + r = KernRe(r'[^\(]+\(\*?\s*([\w\[\]\.]*)\s*\)') + if r.match(arg): + param = r.group(1) + else: + self.emit_msg(ln, f"Invalid param: {arg}") + param = arg + + dtype = KernRe(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 KernRe(r'\(.+\)\s*\[').search(arg): + # Array-of-pointers + + arg = arg.replace('#', ',') + r = KernRe(r'[^\(]+\(\s*\*\s*([\w\[\]\.]*?)\s*(\s*\[\s*[\w]+\s*\]\s*)*\)') + if r.match(arg): + param = r.group(1) + else: + self.emit_msg(ln, f"Invalid param: {arg}") + param = arg + + dtype = KernRe(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 = KernRe(r'\s*:\s*').sub(":", arg) + arg = KernRe(r'\s*\[').sub('[', arg) + + args = KernRe(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 = KernRe(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 = KernRe(r'\s+').split(args.pop(0)) + + args.insert(0, first_arg.pop()) + dtype = ' '.join(first_arg) + + for param in args: + if KernRe(r'^(\*+)\s*(.*)').match(param): + r = KernRe(r'^(\*+)\s*(.*)') + if not r.match(param): + self.emit_msg(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 KernRe(r'(.*?):(\w+)').search(param): + r = KernRe(r'(.*?):(\w+)') + if not r.match(param): + self.emit_msg(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): + """ + Check for errors inside sections, emitting warnings if not found + parameters are described. + """ + + 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 = KernRe(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 = KernRe(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_msg(ln, + f"Excess {dname} '{sects[sx]}' description in '{decl_name}'") + + def check_return_section(self, ln, declaration_name, return_type): + """ + If the function doesn't return void, warns about the lack of a + return description. + """ + + 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 KernRe(r'void\s*\w*\s*$').search(return_type): + return + + if not self.entry.sections.get("Return", None): + self.emit_msg(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 = KernRe(type_pattern + r'([^\{\};]+)(\{)([^\{\}]*)(\})([^\{\}\;]*)(\;)') + + # Extract struct/union definition + members = None + declaration_name = None + decl_type = None + + r = KernRe(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 = KernRe(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_msg(ln, f"{proto} error: Cannot parse struct or union!") + return + + if self.entry.identifier != declaration_name: + self.emit_msg(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 = [ + (KernRe(r'\/\*\s*private:.*?\/\*\s*public:.*?\*\/', re.S | re.I), ''), + (KernRe(r'\/\*\s*private:.*', re.S | re.I), ''), + + # Strip comments + (KernRe(r'\/\*.*?\*\/', re.S), ''), + + # Strip attributes + (attribute, ' '), + (KernRe(r'\s*__aligned\s*\([^;]*\)', re.S), ' '), + (KernRe(r'\s*__counted_by\s*\([^;]*\)', re.S), ' '), + (KernRe(r'\s*__counted_by_(le|be)\s*\([^;]*\)', re.S), ' '), + (KernRe(r'\s*__packed\s*', re.S), ' '), + (KernRe(r'\s*CRYPTO_MINALIGN_ATTR', re.S), ' '), + (KernRe(r'\s*____cacheline_aligned_in_smp', re.S), ' '), + (KernRe(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. + + (KernRe(r'\bstruct_group\s*\(([^,]*,)', re.S), r'STRUCT_GROUP('), + (KernRe(r'\bstruct_group_attr\s*\(([^,]*,){2}', re.S), r'STRUCT_GROUP('), + (KernRe(r'\bstruct_group_tagged\s*\(([^,]*),([^,]*),', re.S), r'struct \1 \2; STRUCT_GROUP('), + (KernRe(r'\b__struct_group\s*\(([^,]*,){3}', re.S), r'STRUCT_GROUP('), + + # Replace macros + # + # TODO: use NestedMatch for FOO($1, $2, ...) matches + # + # it is better to also move those to the NestedMatch logic, + # to ensure that parenthesis will be properly matched. + + (KernRe(r'__ETHTOOL_DECLARE_LINK_MODE_MASK\s*\(([^\)]+)\)', re.S), r'DECLARE_BITMAP(\1, __ETHTOOL_LINK_MODE_MASK_NBITS)'), + (KernRe(r'DECLARE_PHY_INTERFACE_MASK\s*\(([^\)]+)\)', re.S), r'DECLARE_BITMAP(\1, PHY_INTERFACE_MODE_MAX)'), + (KernRe(r'DECLARE_BITMAP\s*\(' + args_pattern + r',\s*' + args_pattern + r'\)', re.S), r'unsigned long \1[BITS_TO_LONGS(\2)]'), + (KernRe(r'DECLARE_HASHTABLE\s*\(' + args_pattern + r',\s*' + args_pattern + r'\)', re.S), r'unsigned long \1[1 << ((\2) - 1)]'), + (KernRe(r'DECLARE_KFIFO\s*\(' + args_pattern + r',\s*' + args_pattern + r',\s*' + args_pattern + r'\)', re.S), r'\2 *\1'), + (KernRe(r'DECLARE_KFIFO_PTR\s*\(' + args_pattern + r',\s*' + args_pattern + r'\)', re.S), r'\2 *\1'), + (KernRe(r'(?:__)?DECLARE_FLEX_ARRAY\s*\(' + args_pattern + r',\s*' + args_pattern + r'\)', re.S), r'\1 \2[]'), + (KernRe(r'DEFINE_DMA_UNMAP_ADDR\s*\(' + args_pattern + r'\)', re.S), r'dma_addr_t \1'), + (KernRe(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 = KernRe(r'[:\[].*').sub('', s_id) + s_id = KernRe(r'^\s*\**(\S+)\s*').sub(r'\1', s_id) + + for arg in content.split(';'): + arg = arg.strip() + + if not arg: + continue + + r = KernRe(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 = KernRe(r':\s*\d+\s*').sub('', arg) + + # Handle arrays + arg = KernRe(r'\[.*\]').sub('', arg) + + # Handle multiple IDs + arg = KernRe(r'\s*,\s*').sub(',', arg) + + r = KernRe(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 = KernRe(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 = KernRe(r'([\{;])').sub(r'\1\n', declaration) + declaration = KernRe(r'\}\s+;').sub('};', declaration) + + # Better handle inlined enums + while True: + r = KernRe(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 = KernRe(r'\s+').sub(' ', clause, count=1) + + if not clause: + continue + + if '}' in clause and level > 1: + level -= 1 + + if not KernRe(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, + definition=declaration, + parameterlist=self.entry.parameterlist, + parameterdescs=self.entry.parameterdescs, + parametertypes=self.entry.parametertypes, + parameterdesc_start_lines=self.entry.parameterdesc_start_lines, + sectionlist=self.entry.sectionlist, + sections=self.entry.sections, + section_start_lines=self.entry.section_start_lines, + purpose=self.entry.declaration_purpose) + + def dump_enum(self, ln, proto): + """ + Stores an enum inside self.entries array. + """ + + # Ignore members marked private + proto = KernRe(r'\/\*\s*private:.*?\/\*\s*public:.*?\*\/', flags=re.S).sub('', proto) + proto = KernRe(r'\/\*\s*private:.*}', flags=re.S).sub('}', proto) + + # Strip comments + proto = KernRe(r'\/\*.*?\*\/', flags=re.S).sub('', proto) + + # Strip #define macros inside enums + proto = KernRe(r'#\s*((define|ifdef|if)\s+|endif)[^;]*;', flags=re.S).sub('', proto) + + members = None + declaration_name = None + + r = KernRe(r'typedef\s+enum\s*\{(.*)\}\s*(\w*)\s*;') + if r.search(proto): + declaration_name = r.group(2) + members = r.group(1).rstrip() + else: + r = KernRe(r'enum\s+(\w*)\s*\{(.*)\}') + if r.match(proto): + declaration_name = r.group(1) + members = r.group(2).rstrip() + + if not members: + self.emit_msg(ln, f"{proto}: error: Cannot parse enum!") + return + + if self.entry.identifier != declaration_name: + if self.entry.identifier == "": + self.emit_msg(ln, + f"{proto}: wrong kernel-doc identifier on prototype") + else: + self.emit_msg(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 = KernRe(r'\([^;]*?[\)]').sub('', members) + + for arg in members.split(','): + if not arg: + continue + arg = KernRe(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 + self.emit_msg(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: + self.emit_msg(ln, + f"Excess enum value '%{k}' description in '{declaration_name}'") + + self.output_declaration('enum', declaration_name, + enum=declaration_name, + parameterlist=self.entry.parameterlist, + parameterdescs=self.entry.parameterdescs, + parameterdesc_start_lines=self.entry.parameterdesc_start_lines, + sectionlist=self.entry.sectionlist, + sections=self.entry.sections, + section_start_lines=self.entry.section_start_lines, + purpose=self.entry.declaration_purpose) + + def dump_declaration(self, ln, prototype): + """ + Stores a data declaration inside self.entries array. + """ + + 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 + + self.output_declaration(self.entry.decl_type, prototype, + entry=self.entry) + + def dump_function(self, ln, prototype): + """ + Stores a function of function macro inside self.entries array. + """ + + 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 = KernRe(search, flags).sub(sub, prototype) + + # Macros are a special case, as they change the prototype format + new_proto = KernRe(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 = KernRe(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 = KernRe(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_msg(ln, + f"cannot understand function prototype: '{prototype}'") + return + + if self.entry.identifier != declaration_name: + self.emit_msg(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, + functiontype=return_type, + parameterlist=self.entry.parameterlist, + parameterdescs=self.entry.parameterdescs, + parametertypes=self.entry.parametertypes, + parameterdesc_start_lines=self.entry.parameterdesc_start_lines, + sectionlist=self.entry.sectionlist, + sections=self.entry.sections, + section_start_lines=self.entry.section_start_lines, + purpose=self.entry.declaration_purpose, + func_macro=func_macro) + else: + self.output_declaration(decl_type, declaration_name, + function=declaration_name, + typedef=False, + functiontype=return_type, + parameterlist=self.entry.parameterlist, + parameterdescs=self.entry.parameterdescs, + parametertypes=self.entry.parametertypes, + parameterdesc_start_lines=self.entry.parameterdesc_start_lines, + sectionlist=self.entry.sectionlist, + sections=self.entry.sections, + section_start_lines=self.entry.section_start_lines, + purpose=self.entry.declaration_purpose, + func_macro=func_macro) + + def dump_typedef(self, ln, proto): + """ + Stores a typedef inside self.entries array. + """ + + typedef_type = r'((?:\s+[\w\*]+\b){0,7}\s+(?:\w+\b|\*+))\s*' + typedef_ident = r'\*?\s*(\w\S+)\s*' + typedef_args = r'\s*\((.*)\);' + + typedef1 = KernRe(r'typedef' + typedef_type + r'\(' + typedef_ident + r'\)' + typedef_args) + typedef2 = KernRe(r'typedef' + typedef_type + typedef_ident + typedef_args) + + # Strip comments + proto = KernRe(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_msg(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, + functiontype=return_type, + parameterlist=self.entry.parameterlist, + parameterdescs=self.entry.parameterdescs, + parametertypes=self.entry.parametertypes, + parameterdesc_start_lines=self.entry.parameterdesc_start_lines, + sectionlist=self.entry.sectionlist, + sections=self.entry.sections, + section_start_lines=self.entry.section_start_lines, + purpose=self.entry.declaration_purpose) + return + + # Handle nested parentheses or brackets + r = KernRe(r'(\(*.\)\s*|\[*.\]\s*);$') + while r.search(proto): + proto = r.sub('', proto) + + # Parse simple typedefs + r = KernRe(r'typedef.*\s+(\w+)\s*;') + if r.match(proto): + declaration_name = r.group(1) + + if self.entry.identifier != declaration_name: + self.emit_msg(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, + sectionlist=self.entry.sectionlist, + sections=self.entry.sections, + section_start_lines=self.entry.section_start_lines, + purpose=self.entry.declaration_purpose) + return + + self.emit_msg(ln, "error: Cannot parse typedef!") + + @staticmethod + def process_export(function_set, line): + """ + process EXPORT_SYMBOL* tags + + This method doesn't use any variable from the class, so declare it + with a staticmethod decorator. + """ + + # Note: it accepts only one EXPORT_SYMBOL* per line, as having + # multiple export lines would violate Kernel coding style. + + if export_symbol.search(line): + symbol = export_symbol.group(2) + function_set.add(symbol) + return + + if export_symbol_ns.search(line): + symbol = export_symbol_ns.group(2) + function_set.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) + self.entry.in_doc_sect = False + + # next line is always the function name + self.state = 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.entry.identifier = self.entry.section + self.state = 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 = KernRe(fr"^{decl_start}([\w\s]+?){parenthesis}?\s*{decl_end}?$") + if r.search(line): + self.entry.identifier = r.group(1) + + # Test for data declaration + r = KernRe(r"^\s*\*?\s*(struct|union|enum|typedef)\b\s*(\w*)") + if r.search(line): + self.entry.decl_type = r.group(1) + self.entry.identifier = r.group(2) + self.entry.is_kernel_comment = True + else: + # Look for foo() or static void foo() - description; + # or misspelt identifier + + r1 = KernRe(fr"^{decl_start}{fn_type}(\w+)\s*{parenthesis}\s*{decl_end}?$") + r2 = KernRe(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 = KernRe(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 = state.BODY + + # if there's no @param blocks need to set up default section here + self.entry.section = SECTION_DEFAULT + self.entry.new_start_line = ln + 1 + + r = KernRe("[-:](.*)") + if r.search(line): + # strip leading/trailing/multiple spaces + self.entry.descr = r.group(1).strip(" ") + + r = KernRe(r"\s+") + self.entry.descr = r.sub(" ", self.entry.descr) + self.entry.declaration_purpose = self.entry.descr + self.state = state.BODY_MAYBE + else: + self.entry.declaration_purpose = "" + + if not self.entry.is_kernel_comment: + self.emit_msg(ln, + f"This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst\n{line}") + self.state = state.NORMAL + + if not self.entry.declaration_purpose and self.config.wshort_desc: + self.emit_msg(ln, + f"missing initial short description on line:\n{line}") + + if not self.entry.identifier and self.entry.decl_type != "enum": + self.emit_msg(ln, + f"wrong kernel-doc identifier on line:\n{line}") + self.state = state.NORMAL + + if self.config.verbose: + self.emit_msg(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_msg(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 == state.BODY_WITH_BLANK_LINE: + r = KernRe(r"\s*\*\s?\S") + if r.match(line): + self.dump_section() + self.entry.section = SECTION_DEFAULT + self.entry.new_start_line = ln + 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 = state.BODY + return + + if doc_end.search(line): + self.dump_section() + + # Look for doc_com + <text> + doc_end: + r = KernRe(r'\s*\*\s*[a-zA-Z_0-9:\.]+\*/') + if r.match(line): + self.emit_msg(ln, f"suspicious ending line: {line}") + + self.entry.prototype = "" + self.entry.new_start_line = ln + 1 + + self.state = 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 = state.BODY + else: + if self.entry.section != SECTION_DEFAULT: + self.state = state.BODY_WITH_BLANK_LINE + else: + self.state = state.BODY + + self.entry.contents += "\n" + + elif self.state == state.BODY_MAYBE: + + # Continued declaration purpose + self.entry.declaration_purpose = self.entry.declaration_purpose.rstrip() + self.entry.declaration_purpose += " " + cont + + r = KernRe(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 = KernRe(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_msg(ln, f"bad line: {line}") + + def process_inline(self, ln, line): + """STATE_INLINE: docbook comments within a prototype.""" + + if self.inline_doc_state == 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 = 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 = state.PROTO + self.inline_doc_state = state.INLINE_NA + return + + if doc_content.search(line): + if self.inline_doc_state == 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 == state.INLINE_NAME: + self.emit_msg(ln, + f"Incorrect use of kernel-doc format: {line}") + + self.inline_doc_state = state.INLINE_ERROR + + def syscall_munge(self, ln, proto): # pylint: disable=W0613 + """ + 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 = KernRe(r'SYSCALL_DEFINE.*\(').sub('long sys_', proto) + + r = KernRe(r'long\s+(sys_.*?),') + if r.search(proto): + proto = KernRe(',').sub('(', proto, count=1) + elif is_void: + proto = KernRe(r'\)').sub('(void)', proto, 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 = KernRe(r'TRACE_EVENT\((.*?),') + if r.search(proto): + tracepointname = r.group(1) + + r = KernRe(r'DEFINE_SINGLE_EVENT\((.*?),') + if r.search(proto): + tracepointname = r.group(1) + + r = KernRe(r'DEFINE_EVENT\((.*?),(.*?),') + if r.search(proto): + tracepointname = r.group(2) + + if tracepointname: + tracepointname = tracepointname.lstrip() + + r = KernRe(r'TP_PROTO\((.*?)\)') + if r.search(proto): + tracepointargs = r.group(1) + + if not tracepointname or not tracepointargs: + self.emit_msg(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 = KernRe(r"\/\/.*$", re.S) + line = r.sub('', line) + + if KernRe(r'\s*#\s*define').match(line): + self.entry.prototype = line + elif line.startswith('#'): + # Strip other macros like #ifdef/#ifndef/#endif/... + pass + else: + r = KernRe(r'([^\{]*)') + if r.match(line): + self.entry.prototype += r.group(1) + " " + + if '{' in line or ';' in line or KernRe(r'\s*#\s*define').match(line): + # strip comments + r = KernRe(r'/\*.*?\*/') + self.entry.prototype = r.sub('', self.entry.prototype) + + # strip newlines/cr's + r = KernRe(r'[\r\n]+') + self.entry.prototype = r.sub(' ', self.entry.prototype) + + # strip leading spaces + r = KernRe(r'^\s+') + self.entry.prototype = r.sub('', self.entry.prototype) + + # Handle self.entry.prototypes for function pointers like: + # int (*pcs_config)(struct foo) + + r = KernRe(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 = KernRe(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 = KernRe(r'[\r\n]+', re.S).sub(' ', line) + + # Strip leading spaces + line = KernRe(r'^\s+', re.S).sub('', line) + + # Strip trailing spaces + line = KernRe(r'\s+$', re.S).sub('', line) + + # Strip C99-style comments to the end of the line + line = KernRe(r"\/\/.*$", re.S).sub('', line) + + # To distinguish preprocessor directive from regular declaration later. + if line.startswith('#'): + line += ";" + + r = KernRe(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 = state.INLINE + self.inline_doc_state = 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", self.entry.identifier, + sectionlist=self.entry.sectionlist, + sections=self.entry.sections, + section_start_lines=self.entry.section_start_lines) + self.reset_state(ln) + + elif doc_content.search(line): + self.entry.contents += doc_content.group(1) + "\n" + + def parse_export(self): + """ + Parses EXPORT_SYMBOL* macros from a single Kernel source file. + """ + + export_table = set() + + try: + with open(self.fname, "r", encoding="utf8", + errors="backslashreplace") as fp: + + for line in fp: + self.process_export(export_table, line) + + except IOError: + return None + + return export_table + + def parse_kdoc(self): + """ + Open and process each line of a C source file. + The 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. + + Besides parsing kernel-doc tags, it also parses export symbols. + """ + + cont = False + prev = "" + prev_ln = None + export_table = set() + + 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 == state.PROTO: + if line.endswith("\\"): + prev += line.rstrip("\\") + 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, state.name[self.state], + state.inline_name[self.inline_doc_state], + line) + + # This is an optimization over the original script. + # There, when export_file was used for the same file, + # it was read twice. Here, we use the already-existing + # loop to parse exported symbols as well. + # + # TODO: It should be noticed that not all states are + # needed here. On a future cleanup, process export only + # at the states that aren't handling comment markups. + self.process_export(export_table, line) + + # Hand this line to the appropriate state handler + if self.state == state.NORMAL: + self.process_normal(ln, line) + elif self.state == state.NAME: + self.process_name(ln, line) + elif self.state in [state.BODY, state.BODY_MAYBE, + state.BODY_WITH_BLANK_LINE]: + self.process_body(ln, line) + elif self.state == state.INLINE: # scanning for inline parameters + self.process_inline(ln, line) + elif self.state == state.PROTO: + self.process_proto(ln, line) + elif self.state == state.DOCBLOCK: + self.process_docblock(ln, line) + except OSError: + self.config.log.error(f"Error: Cannot open file {self.fname}") + + return export_table, self.entries |