lib/rdoc/parser/c.rb
# frozen_string_literal: true
require 'tsort'
##
# RDoc::Parser::C attempts to parse C extension files. It looks for
# the standard patterns that you find in extensions: +rb_define_class+,
# +rb_define_method+ and so on. It tries to find the corresponding
# C source for the methods and extract comments, but if we fail
# we don't worry too much.
#
# The comments associated with a Ruby method are extracted from the C
# comment block associated with the routine that _implements_ that
# method, that is to say the method whose name is given in the
# +rb_define_method+ call. For example, you might write:
#
# /*
# * Returns a new array that is a one-dimensional flattening of this
# * array (recursively). That is, for every element that is an array,
# * extract its elements into the new array.
# *
# * s = [ 1, 2, 3 ] #=> [1, 2, 3]
# * t = [ 4, 5, 6, [7, 8] ] #=> [4, 5, 6, [7, 8]]
# * a = [ s, t, 9, 10 ] #=> [[1, 2, 3], [4, 5, 6, [7, 8]], 9, 10]
# * a.flatten #=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
# */
# static VALUE
# rb_ary_flatten(VALUE ary)
# {
# ary = rb_obj_dup(ary);
# rb_ary_flatten_bang(ary);
# return ary;
# }
#
# ...
#
# void
# Init_Array(void)
# {
# ...
# rb_define_method(rb_cArray, "flatten", rb_ary_flatten, 0);
#
# Here RDoc will determine from the +rb_define_method+ line that there's a
# method called "flatten" in class Array, and will look for the implementation
# in the method +rb_ary_flatten+. It will then use the comment from that
# method in the HTML output. This method must be in the same source file
# as the +rb_define_method+.
#
# The comment blocks may include special directives:
#
# [Document-class: +name+]
# Documentation for the named class.
#
# [Document-module: +name+]
# Documentation for the named module.
#
# [Document-const: +name+]
# Documentation for the named +rb_define_const+.
#
# Constant values can be supplied on the first line of the comment like so:
#
# /* 300: The highest possible score in bowling */
# rb_define_const(cFoo, "PERFECT", INT2FIX(300));
#
# The value can contain internal colons so long as they are escaped with a \
#
# [Document-global: +name+]
# Documentation for the named +rb_define_global_const+
#
# [Document-variable: +name+]
# Documentation for the named +rb_define_variable+
#
# [Document-method\: +method_name+]
# Documentation for the named method. Use this when the method name is
# unambiguous.
#
# [Document-method\: <tt>ClassName::method_name</tt>]
# Documentation for a singleton method in the given class. Use this when
# the method name alone is ambiguous.
#
# [Document-method\: <tt>ClassName#method_name</tt>]
# Documentation for a instance method in the given class. Use this when the
# method name alone is ambiguous.
#
# [Document-attr: +name+]
# Documentation for the named attribute.
#
# [call-seq: <i>text up to an empty line</i>]
# Because C source doesn't give descriptive names to Ruby-level parameters,
# you need to document the calling sequence explicitly
#
# In addition, RDoc assumes by default that the C method implementing a
# Ruby function is in the same source file as the rb_define_method call.
# If this isn't the case, add the comment:
#
# rb_define_method(....); // in filename
#
# As an example, we might have an extension that defines multiple classes
# in its Init_xxx method. We could document them using
#
# /*
# * Document-class: MyClass
# *
# * Encapsulate the writing and reading of the configuration
# * file. ...
# */
#
# /*
# * Document-method: read_value
# *
# * call-seq:
# * cfg.read_value(key) -> value
# * cfg.read_value(key} { |key| } -> value
# *
# * Return the value corresponding to +key+ from the configuration.
# * In the second form, if the key isn't found, invoke the
# * block and return its value.
# */
class RDoc::Parser::C < RDoc::Parser
parse_files_matching(/\.(?:([CcHh])\1?|c([+xp])\2|y)\z/)
include RDoc::Text
# :stopdoc:
BOOL_ARG_PATTERN = /\s*+\b([01]|Q?(?:true|false)|TRUE|FALSE)\b\s*/
TRUE_VALUES = ['1', 'TRUE', 'true', 'Qtrue'].freeze
# :startdoc:
##
# Maps C variable names to names of Ruby classes or modules
attr_reader :classes
##
# C file the parser is parsing
attr_accessor :content
##
# Dependencies from a missing enclosing class to the classes in
# missing_dependencies that depend upon it.
attr_reader :enclosure_dependencies
##
# Maps C variable names to names of Ruby classes (and singleton classes)
attr_reader :known_classes
##
# Classes found while parsing the C file that were not yet registered due to
# a missing enclosing class. These are processed by do_missing
attr_reader :missing_dependencies
##
# Maps C variable names to names of Ruby singleton classes
attr_reader :singleton_classes
##
# The TopLevel items in the parsed file belong to
attr_reader :top_level
##
# Prepares for parsing a C file. See RDoc::Parser#initialize for details on
# the arguments.
def initialize top_level, file_name, content, options, stats
super
@known_classes = RDoc::KNOWN_CLASSES.dup
@content = handle_tab_width handle_ifdefs_in @content
@file_dir = File.dirname @file_name
@classes = load_variable_map :c_class_variables
@singleton_classes = load_variable_map :c_singleton_class_variables
@markup = @options.markup
# class_variable => { function => [method, ...] }
@methods = Hash.new { |h, f| h[f] = Hash.new { |i, m| i[m] = [] } }
# missing variable => [handle_class_module arguments]
@missing_dependencies = {}
# missing enclosure variable => [dependent handle_class_module arguments]
@enclosure_dependencies = Hash.new { |h, k| h[k] = [] }
@enclosure_dependencies.instance_variable_set :@missing_dependencies,
@missing_dependencies
@enclosure_dependencies.extend TSort
def @enclosure_dependencies.tsort_each_node &block
each_key(&block)
rescue TSort::Cyclic => e
cycle_vars = e.message.scan(/"(.*?)"/).flatten
cycle = cycle_vars.sort.map do |var_name|
delete var_name
var_name, type, mod_name, = @missing_dependencies[var_name]
"#{type} #{mod_name} (#{var_name})"
end.join ', '
warn "Unable to create #{cycle} due to a cyclic class or module creation"
retry
end
def @enclosure_dependencies.tsort_each_child node, &block
fetch(node, []).each(&block)
end
end
##
# Scans #content for rb_define_alias
def do_aliases
@content.scan(/rb_define_alias\s*\(
\s*(\w+),
\s*"(.+?)",
\s*"(.+?)"
\s*\)/xm) do |var_name, new_name, old_name|
class_name = @known_classes[var_name]
unless class_name then
@options.warn "Enclosing class or module %p for alias %s %s is not known" % [
var_name, new_name, old_name]
next
end
class_obj = find_class var_name, class_name
comment = find_alias_comment var_name, new_name, old_name
comment.normalize
if comment.to_s.empty? and existing_method = class_obj.method_list.find { |m| m.name == old_name}
comment = existing_method.comment
end
add_alias(var_name, class_obj, old_name, new_name, comment)
end
end
##
# Add alias, either from a direct alias definition, or from two
# method that reference the same function.
def add_alias(var_name, class_obj, old_name, new_name, comment)
al = RDoc::Alias.new '', old_name, new_name, ''
al.singleton = @singleton_classes.key? var_name
al.comment = comment
al.record_location @top_level
class_obj.add_alias al
@stats.add_alias al
al
end
##
# Scans #content for rb_attr and rb_define_attr
def do_attrs
@content.scan(/rb_attr\s*\(
\s*(\w+),
\s*([\w"()]+),
#{BOOL_ARG_PATTERN},
#{BOOL_ARG_PATTERN},
\s*\w+\);/xmo) do |var_name, attr_name, read, write|
handle_attr var_name, attr_name, read, write
end
@content.scan(%r%rb_define_attr\(
\s*([\w\.]+),
\s*"([^"]+)",
#{BOOL_ARG_PATTERN},
#{BOOL_ARG_PATTERN}\);
%xmo) do |var_name, attr_name, read, write|
handle_attr var_name, attr_name, read, write
end
end
##
# Scans #content for boot_defclass
def do_boot_defclass
@content.scan(/(\w+)\s*=\s*boot_defclass\s*\(\s*"(\w+?)",\s*(\w+?)\s*\)/) do
|var_name, class_name, parent|
parent = nil if parent == "0"
handle_class_module(var_name, :class, class_name, parent, nil)
end
end
##
# Scans #content for rb_define_class, boot_defclass, rb_define_class_under
# and rb_singleton_class
def do_classes_and_modules
do_boot_defclass if @file_name == "class.c"
@content.scan(
%r(
(?<open>\s*\(\s*) {0}
(?<close>\s*\)\s*) {0}
(?<name>\s*"(?<class_name>\w+)") {0}
(?<parent>\s*(?:
(?<parent_name>[\w\*\s\(\)\.\->]+) |
rb_path2class\s*\(\s*"(?<path>[\w:]+)"\s*\)
)) {0}
(?<under>\w+) {0}
(?<var_name>[\w\.]+)\s* =
\s*rb_(?:
define_(?:
class(?: # rb_define_class(name, parent_name)
\(\s*
\g<name>,
\g<parent>
\s*\)
|
_under\g<open> # rb_define_class_under(under, name, parent_name...)
\g<under>,
\g<name>,
\g<parent>
\g<close>
)
|
(?<module>)
module(?: # rb_define_module(name)
\g<open>
\g<name>
\g<close>
|
_under\g<open> # rb_define_module_under(under, name)
\g<under>,
\g<name>
\g<close>
)
)
|
(?<attributes>(?:\s*"\w+",)*\s*NULL\s*) {0}
struct_define(?:
\g<open> # rb_struct_define(name, ...)
\g<name>,
|
_under\g<open> # rb_struct_define_under(under, name, ...)
\g<under>,
\g<name>,
|
_without_accessor(?:
\g<open> # rb_struct_define_without_accessor(name, parent_name, ...)
|
_under\g<open> # rb_struct_define_without_accessor_under(under, name, parent_name, ...)
\g<under>,
)
\g<name>,
\g<parent>,
\s*\w+, # Allocation function
)
\g<attributes>
\g<close>
|
singleton_class\g<open> # rb_singleton_class(target_class_name)
(?<target_class_name>\w+)
\g<close>
)
)mx
) do
if target_class_name = $~[:target_class_name]
# rb_singleton_class(target_class_name)
handle_singleton $~[:var_name], target_class_name
next
end
var_name = $~[:var_name]
type = $~[:module] ? :module : :class
class_name = $~[:class_name]
parent_name = $~[:parent_name] || $~[:path]
under = $~[:under]
attributes = $~[:attributes]
handle_class_module(var_name, type, class_name, parent_name, under)
if attributes and !parent_name # rb_struct_define *not* without_accessor
true_flag = 'Qtrue'
attributes.scan(/"\K\w+(?=")/) do |attr_name|
handle_attr var_name, attr_name, true_flag, true_flag
end
end
end
end
##
# Scans #content for rb_define_variable, rb_define_readonly_variable,
# rb_define_const and rb_define_global_const
def do_constants
@content.scan(%r%\Wrb_define_
( variable |
readonly_variable |
const |
global_const )
\s*\(
(?:\s*(\w+),)?
\s*"(\w+)",
\s*(.*?)\s*\)\s*;
%xm) do |type, var_name, const_name, definition|
var_name = "rb_cObject" if !var_name or var_name == "rb_mKernel"
handle_constants type, var_name, const_name, definition
end
@content.scan(%r%
\Wrb_curses_define_const
\s*\(
\s*
(\w+)
\s*
\)
\s*;%xm) do |consts|
const = consts.first
handle_constants 'const', 'mCurses', const, "UINT2NUM(#{const})"
end
@content.scan(%r%
\Wrb_file_const
\s*\(
\s*
"([^"]+)",
\s*
(.*?)
\s*
\)
\s*;%xm) do |name, value|
handle_constants 'const', 'rb_mFConst', name, value
end
end
##
# Scans #content for rb_include_module
def do_includes
@content.scan(/rb_include_module\s*\(\s*(\w+?),\s*(\w+?)\s*\)/) do |c,m|
next unless cls = @classes[c]
m = @known_classes[m] || m
comment = new_comment '', @top_level, :c
incl = cls.add_include RDoc::Include.new(m, comment)
incl.record_location @top_level
end
end
##
# Scans #content for rb_define_method, rb_define_singleton_method,
# rb_define_module_function, rb_define_private_method,
# rb_define_global_function and define_filetest_function
def do_methods
@content.scan(%r%rb_define_
(
singleton_method |
method |
module_function |
private_method
)
\s*\(\s*([\w\.]+),
\s*"([^"]+)",
\s*(?:RUBY_METHOD_FUNC\(|VALUEFUNC\(|\(METHOD\))?(\w+)\)?,
\s*(-?\w+)\s*\)
(?:;\s*/[*/]\s+in\s+(\w+?\.(?:cpp|c|y)))?
%xm) do |type, var_name, meth_name, function, param_count, source_file|
# Ignore top-object and weird struct.c dynamic stuff
next if var_name == "ruby_top_self"
next if var_name == "nstr"
var_name = "rb_cObject" if var_name == "rb_mKernel"
handle_method(type, var_name, meth_name, function, param_count,
source_file)
end
@content.scan(%r%rb_define_global_function\s*\(
\s*"([^"]+)",
\s*(?:RUBY_METHOD_FUNC\(|VALUEFUNC\()?(\w+)\)?,
\s*(-?\w+)\s*\)
(?:;\s*/[*/]\s+in\s+(\w+?\.[cy]))?
%xm) do |meth_name, function, param_count, source_file|
handle_method("method", "rb_mKernel", meth_name, function, param_count,
source_file)
end
@content.scan(/define_filetest_function\s*\(
\s*"([^"]+)",
\s*(?:RUBY_METHOD_FUNC\(|VALUEFUNC\()?(\w+)\)?,
\s*(-?\w+)\s*\)/xm) do |meth_name, function, param_count|
handle_method("method", "rb_mFileTest", meth_name, function, param_count)
handle_method("singleton_method", "rb_cFile", meth_name, function,
param_count)
end
end
##
# Creates classes and module that were missing were defined due to the file
# order being different than the declaration order.
def do_missing
return if @missing_dependencies.empty?
@enclosure_dependencies.tsort.each do |in_module|
arguments = @missing_dependencies.delete in_module
next unless arguments # dependency on existing class
handle_class_module(*arguments)
end
end
##
# Finds the comment for an alias on +class_name+ from +new_name+ to
# +old_name+
def find_alias_comment class_name, new_name, old_name
content =~ %r%((?>/\*.*?\*/\s+))
rb_define_alias\(\s*#{Regexp.escape class_name}\s*,
\s*"#{Regexp.escape new_name}"\s*,
\s*"#{Regexp.escape old_name}"\s*\);%xm
new_comment($1 || '', @top_level, :c)
end
##
# Finds a comment for rb_define_attr, rb_attr or Document-attr.
#
# +var_name+ is the C class variable the attribute is defined on.
# +attr_name+ is the attribute's name.
#
# +read+ and +write+ are the read/write flags ('1' or '0'). Either both or
# neither must be provided.
def find_attr_comment var_name, attr_name, read = nil, write = nil
attr_name = Regexp.escape attr_name
rw = if read and write then
/\s*#{read}\s*,\s*#{write}\s*/xm
else
/.*?/m
end
comment = if @content =~ %r%((?>/\*.*?\*/\s+))
rb_define_attr\((?:\s*#{var_name},)?\s*
"#{attr_name}"\s*,
#{rw}\)\s*;%xm then
$1
elsif @content =~ %r%((?>/\*.*?\*/\s+))
rb_attr\(\s*#{var_name}\s*,
\s*#{attr_name}\s*,
#{rw},.*?\)\s*;%xm then
$1
elsif @content =~ %r%(/\*.*?(?:\s*\*\s*)?)
Document-attr:\s#{attr_name}\s*?\n
((?>(.|\n)*?\*/))%x then
"#{$1}\n#{$2}"
else
''
end
new_comment comment, @top_level, :c
end
##
# Generate a Ruby-method table
def gen_body_table file_content
table = {}
file_content.scan(%r{
((?>/\*.*?\*/\s*)?)
((?:\w+\s+){0,2} VALUE\s+(\w+)
\s*(?:\([^\)]*\))(?:[^\);]|$))
| ((?>/\*.*?\*/\s*))^\s*(\#\s*define\s+(\w+)\s+(\w+))
| ^\s*\#\s*define\s+(\w+)\s+(\w+)
}xm) do
case
when name = $3
table[name] = [:func_def, $1, $2, $~.offset(2)] if !(t = table[name]) || t[0] != :func_def
when name = $6
table[name] = [:macro_def, $4, $5, $~.offset(5), $7] if !(t = table[name]) || t[0] == :macro_alias
when name = $8
table[name] ||= [:macro_alias, $9]
end
end
table
end
##
# Find the C code corresponding to a Ruby method
def find_body class_name, meth_name, meth_obj, file_content, quiet = false
if file_content
@body_table ||= {}
@body_table[file_content] ||= gen_body_table file_content
type, *args = @body_table[file_content][meth_name]
end
case type
when :func_def
comment = new_comment args[0], @top_level, :c
body = args[1]
offset, = args[2]
comment.remove_private if comment
# try to find the whole body
body = $& if /#{Regexp.escape body}[^(]*?\{.*?^\}/m =~ file_content
# The comment block may have been overridden with a 'Document-method'
# block. This happens in the interpreter when multiple methods are
# vectored through to the same C method but those methods are logically
# distinct (for example Kernel.hash and Kernel.object_id share the same
# implementation
override_comment = find_override_comment class_name, meth_obj
comment = override_comment if override_comment
comment.normalize
find_modifiers comment, meth_obj if comment
#meth_obj.params = params
meth_obj.start_collecting_tokens
tk = { :line_no => 1, :char_no => 1, :text => body }
meth_obj.add_token tk
meth_obj.comment = comment
meth_obj.line = file_content[0, offset].count("\n") + 1
body
when :macro_def
comment = new_comment args[0], @top_level, :c
body = args[1]
offset, = args[2]
find_body class_name, args[3], meth_obj, file_content, true
comment.normalize
find_modifiers comment, meth_obj
meth_obj.start_collecting_tokens
tk = { :line_no => 1, :char_no => 1, :text => body }
meth_obj.add_token tk
meth_obj.comment = comment
meth_obj.line = file_content[0, offset].count("\n") + 1
body
when :macro_alias
# with no comment we hope the aliased definition has it and use it's
# definition
body = find_body(class_name, args[0], meth_obj, file_content, true)
return body if body
@options.warn "No definition for #{meth_name}"
false
else # No body, but might still have an override comment
comment = find_override_comment class_name, meth_obj
if comment then
comment.normalize
find_modifiers comment, meth_obj
meth_obj.comment = comment
''
else
@options.warn "No definition for #{meth_name}"
false
end
end
end
##
# Finds a RDoc::NormalClass or RDoc::NormalModule for +raw_name+
def find_class(raw_name, name, base_name = nil)
unless @classes[raw_name]
if raw_name =~ /^rb_m/
container = @top_level.add_module RDoc::NormalModule, name
else
container = @top_level.add_class RDoc::NormalClass, name
end
container.name = base_name if base_name
container.record_location @top_level
@classes[raw_name] = container
end
@classes[raw_name]
end
##
# Look for class or module documentation above Init_+class_name+(void),
# in a Document-class +class_name+ (or module) comment or above an
# rb_define_class (or module). If a comment is supplied above a matching
# Init_ and a rb_define_class the Init_ comment is used.
#
# /*
# * This is a comment for Foo
# */
# Init_Foo(void) {
# VALUE cFoo = rb_define_class("Foo", rb_cObject);
# }
#
# /*
# * Document-class: Foo
# * This is a comment for Foo
# */
# Init_foo(void) {
# VALUE cFoo = rb_define_class("Foo", rb_cObject);
# }
#
# /*
# * This is a comment for Foo
# */
# VALUE cFoo = rb_define_class("Foo", rb_cObject);
def find_class_comment class_name, class_mod
comment = nil
if @content =~ %r%
((?>/\*.*?\*/\s+))
(static\s+)?
void\s+
Init(?:VM)?_(?i:#{class_name})\s*(?:_\(\s*)?\(\s*(?:void\s*)?\)%xm then
comment = $1.sub(%r%Document-(?:class|module):\s+#{class_name}%, '')
elsif @content =~ %r%Document-(?:class|module):\s+#{class_name}\s*?
(?:<\s+[:,\w]+)?\n((?>.*?\*/))%xm then
comment = "/*\n#{$1}"
elsif @content =~ %r%((?>/\*.*?\*/\s+))
([\w\.\s]+\s* = \s+)?rb_define_(class|module)[\t (]*?"(#{class_name})"%xm then
comment = $1
elsif @content =~ %r%((?>/\*.*?\*/\s+))
([\w\. \t]+ = \s+)?rb_define_(class|module)_under[\t\w, (]*?"(#{class_name.split('::').last})"%xm then
comment = $1
else
comment = ''
end
comment = new_comment comment, @top_level, :c
comment.normalize
look_for_directives_in class_mod, comment
class_mod.add_comment comment, @top_level
end
##
# Generate a const table
def gen_const_table file_content
table = {}
@content.scan(%r{
(?<doc>(?>^\s*/\*.*?\*/\s+))
rb_define_(?<type>\w+)\(\s*(?:\w+),\s*
"(?<name>\w+)"\s*,
.*?\)\s*;
| (?<doc>(?>^\s*/\*.*?\*/\s+))
rb_file_(?<type>const)\(\s*
"(?<name>\w+)"\s*,
.*?\)\s*;
| (?<doc>(?>^\s*/\*.*?\*/\s+))
rb_curses_define_(?<type>const)\(\s*
(?<name>\w+)
\s*\)\s*;
| Document-(?:const|global|variable):\s
(?<name>(?:\w+::)*\w+)
\s*?\n(?<doc>(?>.*?\*/))
}mxi) do
name, doc, type = $~.values_at(:name, :doc, :type)
if type
table[[type, name]] = doc
else
table[name] = "/*\n" + doc
end
end
table
end
##
# Finds a comment matching +type+ and +const_name+ either above the
# comment or in the matching Document- section.
def find_const_comment(type, const_name, class_name = nil)
@const_table ||= {}
@const_table[@content] ||= gen_const_table @content
table = @const_table[@content]
comment =
table[[type, const_name]] ||
(class_name && table[class_name + "::" + const_name]) ||
table[const_name] ||
''
new_comment comment, @top_level, :c
end
##
# Handles modifiers in +comment+ and updates +meth_obj+ as appropriate.
def find_modifiers comment, meth_obj
comment.normalize
comment.extract_call_seq meth_obj
look_for_directives_in meth_obj, comment
end
##
# Finds a <tt>Document-method</tt> override for +meth_obj+ on +class_name+
def find_override_comment class_name, meth_obj
name = Regexp.escape meth_obj.name
prefix = Regexp.escape meth_obj.name_prefix
comment = if @content =~ %r%Document-method:
\s+#{class_name}#{prefix}#{name}
\s*?\n((?>.*?\*/))%xm then
"/*#{$1}"
elsif @content =~ %r%Document-method:
\s#{name}\s*?\n((?>.*?\*/))%xm then
"/*#{$1}"
end
return unless comment
new_comment comment, @top_level, :c
end
##
# Creates a new RDoc::Attr +attr_name+ on class +var_name+ that is either
# +read+, +write+ or both
def handle_attr(var_name, attr_name, read, write)
rw = ''
rw += 'R' if TRUE_VALUES.include?(read)
rw += 'W' if TRUE_VALUES.include?(write)
class_name = @known_classes[var_name]
return unless class_name
class_obj = find_class var_name, class_name
return unless class_obj
comment = find_attr_comment var_name, attr_name
comment.normalize
name = attr_name.gsub(/rb_intern(?:_const)?\("([^"]+)"\)/, '\1')
attr = RDoc::Attr.new '', name, rw, comment
attr.record_location @top_level
class_obj.add_attribute attr
@stats.add_attribute attr
end
##
# Creates a new RDoc::NormalClass or RDoc::NormalModule based on +type+
# named +class_name+ in +parent+ which was assigned to the C +var_name+.
def handle_class_module(var_name, type, class_name, parent, in_module)
parent_name = @known_classes[parent] || parent
if in_module then
enclosure = @classes[in_module] || @store.find_c_enclosure(in_module)
if enclosure.nil? and enclosure = @known_classes[in_module] then
enc_type = /^rb_m/ =~ in_module ? :module : :class
handle_class_module in_module, enc_type, enclosure, nil, nil
enclosure = @classes[in_module]
end
unless enclosure then
@enclosure_dependencies[in_module] << var_name
@missing_dependencies[var_name] =
[var_name, type, class_name, parent, in_module]
return
end
else
enclosure = @top_level
end
if type == :class then
full_name = if RDoc::ClassModule === enclosure then
enclosure.full_name + "::#{class_name}"
else
class_name
end
if @content =~ %r%Document-class:\s+#{full_name}\s*<\s+([:,\w]+)% then
parent_name = $1
end
cm = enclosure.add_class RDoc::NormalClass, class_name, parent_name
else
cm = enclosure.add_module RDoc::NormalModule, class_name
end
cm.record_location enclosure.top_level
find_class_comment cm.full_name, cm
case cm
when RDoc::NormalClass
@stats.add_class cm
when RDoc::NormalModule
@stats.add_module cm
end
@classes[var_name] = cm
@known_classes[var_name] = cm.full_name
@store.add_c_enclosure var_name, cm
end
##
# Adds constants. By providing some_value: at the start of the comment you
# can override the C value of the comment to give a friendly definition.
#
# /* 300: The perfect score in bowling */
# rb_define_const(cFoo, "PERFECT", INT2FIX(300));
#
# Will override <tt>INT2FIX(300)</tt> with the value +300+ in the output
# RDoc. Values may include quotes and escaped colons (\:).
def handle_constants(type, var_name, const_name, definition)
class_name = @known_classes[var_name]
return unless class_name
class_obj = find_class var_name, class_name, class_name[/::\K[^:]+\z/]
unless class_obj then
@options.warn 'Enclosing class or module %p is not known' % [const_name]
return
end
comment = find_const_comment type, const_name, class_name
comment.normalize
# In the case of rb_define_const, the definition and comment are in
# "/* definition: comment */" form. The literal ':' and '\' characters
# can be escaped with a backslash.
if type.downcase == 'const' then
if /\A(.+?)?:(?!\S)/ =~ comment.text
new_definition, new_comment = $1, $'
if !new_definition # Default to literal C definition
new_definition = definition
else
new_definition = new_definition.gsub(/\\([\\:])/, '\1')
end
new_definition.sub!(/\A(\s+)/, '')
new_comment = "#{$1}#{new_comment.lstrip}"
new_comment = self.new_comment(new_comment, @top_level, :c)
con = RDoc::Constant.new const_name, new_definition, new_comment
else
con = RDoc::Constant.new const_name, definition, comment
end
else
con = RDoc::Constant.new const_name, definition, comment
end
con.record_location @top_level
@stats.add_constant con
class_obj.add_constant con
end
##
# Removes #ifdefs that would otherwise confuse us
def handle_ifdefs_in(body)
body.gsub(/^#ifdef HAVE_PROTOTYPES.*?#else.*?\n(.*?)#endif.*?\n/m, '\1')
end
##
# Adds an RDoc::AnyMethod +meth_name+ defined on a class or module assigned
# to +var_name+. +type+ is the type of method definition function used.
# +singleton_method+ and +module_function+ create a singleton method.
def handle_method(type, var_name, meth_name, function, param_count,
source_file = nil)
class_name = @known_classes[var_name]
singleton = @singleton_classes.key? var_name
@methods[var_name][function] << meth_name
return unless class_name
class_obj = find_class var_name, class_name
if existing_method = class_obj.method_list.find { |m| m.c_function == function }
add_alias(var_name, class_obj, existing_method.name, meth_name, existing_method.comment)
end
if class_obj then
if meth_name == 'initialize' then
meth_name = 'new'
singleton = true
type = 'method' # force public
end
meth_obj = RDoc::AnyMethod.new '', meth_name
meth_obj.c_function = function
meth_obj.singleton =
singleton || %w[singleton_method module_function].include?(type)
p_count = Integer(param_count) rescue -1
if source_file then
file_name = File.join @file_dir, source_file
if File.exist? file_name then
file_content = File.read file_name
else
@options.warn "unknown source #{source_file} for #{meth_name} in #{@file_name}"
end
else
file_content = @content
end
body = find_body class_name, function, meth_obj, file_content
if body and meth_obj.document_self then
meth_obj.params = if p_count < -1 then # -2 is Array
'(*args)'
elsif p_count == -1 then # argc, argv
rb_scan_args body
else
args = (1..p_count).map { |i| "p#{i}" }
"(#{args.join ', '})"
end
meth_obj.record_location @top_level
if meth_obj.section_title
class_obj.temporary_section = class_obj.add_section(meth_obj.section_title)
end
class_obj.add_method meth_obj
@stats.add_method meth_obj
meth_obj.visibility = :private if 'private_method' == type
end
end
end
##
# Registers a singleton class +sclass_var+ as a singleton of +class_var+
def handle_singleton sclass_var, class_var
class_name = @known_classes[class_var]
@known_classes[sclass_var] = class_name
@singleton_classes[sclass_var] = class_name
end
##
# Loads the variable map with the given +name+ from the RDoc::Store, if
# present.
def load_variable_map map_name
return {} unless files = @store.cache[map_name]
return {} unless name_map = files[@file_name]
class_map = {}
name_map.each do |variable, name|
next unless mod = @store.find_class_or_module(name)
class_map[variable] = if map_name == :c_class_variables then
mod
else
name
end
@known_classes[variable] = name
end
class_map
end
##
# Look for directives in a normal comment block:
#
# /*
# * :title: My Awesome Project
# */
#
# This method modifies the +comment+
def look_for_directives_in context, comment
@preprocess.handle comment, context do |directive, param|
case directive
when 'main' then
@options.main_page = param
''
when 'title' then
@options.default_title = param if @options.respond_to? :default_title=
''
end
end
comment
end
##
# Extracts parameters from the +method_body+ and returns a method
# parameter string. Follows 1.9.3dev's scan-arg-spec, see README.EXT
def rb_scan_args method_body
method_body =~ /rb_scan_args\((.*?)\)/m
return '(*args)' unless $1
$1.split(/,/)[2] =~ /"(.*?)"/ # format argument
format = $1.split(//)
lead = opt = trail = 0
if format.first =~ /\d/ then
lead = $&.to_i
format.shift
if format.first =~ /\d/ then
opt = $&.to_i
format.shift
if format.first =~ /\d/ then
trail = $&.to_i
format.shift
block_arg = true
end
end
end
if format.first == '*' and not block_arg then
var = true
format.shift
if format.first =~ /\d/ then
trail = $&.to_i
format.shift
end
end
if format.first == ':' then
hash = true
format.shift
end
if format.first == '&' then
block = true
format.shift
end
# if the format string is not empty there's a bug in the C code, ignore it
args = []
position = 1
(1...(position + lead)).each do |index|
args << "p#{index}"
end
position += lead
(position...(position + opt)).each do |index|
args << "p#{index} = v#{index}"
end
position += opt
if var then
args << '*args'
position += 1
end
(position...(position + trail)).each do |index|
args << "p#{index}"
end
position += trail
if hash then
args << "p#{position} = {}"
end
args << '&block' if block
"(#{args.join ', '})"
end
##
# Removes lines that are commented out that might otherwise get picked up
# when scanning for classes and methods
def remove_commented_out_lines
@content = @content.gsub(%r%//.*rb_define_%, '//')
end
##
# Extracts the classes, modules, methods, attributes, constants and aliases
# from a C file and returns an RDoc::TopLevel for this file
def scan
remove_commented_out_lines
do_classes_and_modules
do_missing
do_constants
do_methods
do_includes
do_aliases
do_attrs
@store.add_c_variables self
@top_level
end
##
# Creates a RDoc::Comment instance.
def new_comment text = nil, location = nil, language = nil
RDoc::Comment.new(text, location, language).tap do |comment|
comment.format = @markup
end
end
end