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File Name : c.rb

# frozen_string_literal: false
require 'tsort'

##
# RDoc::Parser::C attempts to parse C extension files.  It looks for
# the standard patterns that you find in extensions: <tt>rb_define_class,
# rb_define_method</tt> 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
# <tt>rb_define_method</tt> 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(ary)
#        VALUE ary;
#    {
#        ary = rb_obj_dup(ary);
#        rb_ary_flatten_bang(ary);
#        return ary;
#    }
#
#    ...
#
#    void
#    Init_Array()
#    {
#      ...
#      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

##
  # 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

# 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

##
  # Removes duplicate call-seq entries for methods using the same
  # implementation.

def deduplicate_call_seq
    @methods.each do |var_name, functions|
      class_name = @known_classes[var_name]
      class_obj  = find_class var_name, class_name

functions.each_value do |method_names|
        next if method_names.length == 1

method_names.each do |method_name|
          deduplicate_method_name class_obj, method_name
        end
      end
    end
  end

##
  # If two ruby methods share a C implementation (and comment) this
  # deduplicates the examples in the call_seq for the method to reduce
  # confusion in the output.

def deduplicate_method_name class_obj, method_name # :nodoc:
    return unless
      method = class_obj.method_list.find { |m| m.name == method_name }
    return unless call_seq = method.call_seq

method_name = method_name[0, 1] if method_name =~ /\A\[/

entries = call_seq.split "\n"

matching = entries.select do |entry|
      entry =~ /^\w*\.?#{Regexp.escape method_name}/ or
        entry =~ /\s#{Regexp.escape method_name}\s/
    end

method.call_seq = matching.join "\n"
  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

al = RDoc::Alias.new '', old_name, new_name, ''
      al.singleton = @singleton_classes.key? var_name

comment = find_alias_comment var_name, new_name, old_name

comment.normalize

al.comment = comment

al.record_location @top_level

class_obj.add_alias al
      @stats.add_alias al
    end
  end

##
  # Scans #content for rb_attr and rb_define_attr

def do_attrs
    @content.scan(/rb_attr\s*$
                   \s*(\w+),
                   \s*([\w"()]+),
                   \s*([01]),
                   \s*([01]),
                   \s*\w+$;/xm) 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*"([^"]+)",
                             \s*(\d+),
                             \s*(\d+)\s*$;
                %xm) 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
    do_boot_defclass
    do_define_class
    do_define_class_under
    do_singleton_class
    do_struct_define_without_accessor
  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_define_class

def do_define_class
    # The '.' lets us handle SWIG-generated files
    @content.scan(/([\w\.]+)\s* = \s*rb_define_class\s*
              $
                 \s*"(\w+)",
                 \s*(\w+)\s*
              $/mx) do |var_name, class_name, parent|
      handle_class_module(var_name, :class, class_name, parent, nil)
    end
  end

##
  # Scans #content for rb_define_class_under

def do_define_class_under
    @content.scan(/([\w\.]+)\s* =                  # var_name
                   \s*rb_define_class_under\s*
                   $
                     \s* (\w+),                    # under
                     \s* "(\w+)",                  # class_name
                     \s*
                     (?:
                       ([\w\*\s\($\.\->]+) |      # parent_name
                       rb_path2class$"([\w:]+)"$ # path
                     )
                     \s*
                   \)
                  /mx) do |var_name, under, class_name, parent_name, path|
      parent = path || parent_name

handle_class_module var_name, :class, class_name, parent, under
    end
  end

##
  # Scans #content for rb_define_module

def do_define_module
    @content.scan(/(\w+)\s* = \s*rb_define_module\s*$\s*"(\w+)"\s*$/mx) do
      |var_name, class_name|
      handle_class_module(var_name, :module, class_name, nil, nil)
    end
  end

##
  # Scans #content for rb_define_module_under

def do_define_module_under
    @content.scan(/(\w+)\s* = \s*rb_define_module_under\s*
              $
                 \s*(\w+),
                 \s*"(\w+)"
              \s*$/mx) do |var_name, in_module, class_name|
      handle_class_module(var_name, :module, class_name, nil, in_module)
    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 = RDoc::Comment.new '', @top_level
      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

##
  # Scans #content for rb_define_module and rb_define_module_under

def do_modules
    do_define_module
    do_define_module_under
  end

##
  # Scans #content for rb_singleton_class

def do_singleton_class
    @content.scan(/([\w\.]+)\s* = \s*rb_singleton_class\s*
                  $
                    \s*(\w+)
                  \s*$/mx) do |sclass_var, class_var|
      handle_singleton sclass_var, class_var
    end
  end

##
  # Scans #content for struct_define_without_accessor

def do_struct_define_without_accessor
    @content.scan(/([\w\.]+)\s* = \s*rb_struct_define_without_accessor\s*
              $
                 \s*"(\w+)",  # Class name
                 \s*(\w+),    # Parent class
                 \s*\w+,      # Allocation function
                 (\s*"\w+",)* # Attributes
                 \s*NULL
              $/mx) do |var_name, class_name, parent|
      handle_class_module(var_name, :class, class_name, parent, nil)
    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

RDoc::Comment.new($1 || '', @top_level)
  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

RDoc::Comment.new comment, @top_level
  end

##
  # Find the C code corresponding to a Ruby method

def find_body class_name, meth_name, meth_obj, file_content, quiet = false
    case file_content
    when %r%((?>/\*.*?\*/\s*)?)
            ((?:(?:\w+)\s+)?
             (?:intern\s+)?VALUE\s+#{meth_name}
             \s*($[^)]*$)([^;]|$))%xm then
      comment = RDoc::Comment.new $1, @top_level
      body = $2
      offset, = $~.offset(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 = RDoc::RubyToken::Token.new nil, 1, 1
      tk.set_text body
      meth_obj.add_token tk
      meth_obj.comment = comment
      meth_obj.offset  = offset
      meth_obj.line    = file_content[0, offset].count("\n") + 1

body
    when %r%((?>/\*.*?\*/\s*))^\s*(\#\s*define\s+#{meth_name}\s+(\w+))%m then
      comment = RDoc::Comment.new $1, @top_level
      body = $2
      offset = $~.offset(2).first

find_body class_name, $3, meth_obj, file_content, true

comment.normalize
      find_modifiers comment, meth_obj

meth_obj.start_collecting_tokens
      tk = RDoc::RubyToken::Token.new nil, 1, 1
      tk.set_text body
      meth_obj.add_token tk
      meth_obj.comment = comment
      meth_obj.offset  = offset
      meth_obj.line    = file_content[0, offset].count("\n") + 1

body
    when %r%^\s*\#\s*define\s+#{meth_name}\s+(\w+)%m then
      # with no comment we hope the aliased definition has it and use it's
      # definition

body = find_body(class_name, $1, 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)
    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.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_#{class_name}\s*(?:_$\s*)?\(\s*(?:void\s*)?$%xmi 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 = RDoc::Comment.new comment, @top_level
    comment.normalize

look_for_directives_in class_mod, comment

class_mod.add_comment comment, @top_level
  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)
    comment = if @content =~ %r%((?>^\s*/\*.*?\*/\s+))
                             rb_define_#{type}$(?:\s*(\w+),)?\s*
                                                "#{const_name}"\s*,
                                                .*?$\s*;%xmi then
                $1
              elsif class_name and
                    @content =~ %r%Document-(?:const|global|variable):\s
                                   #{class_name}::#{const_name}
                                   \s*?\n((?>.*?\*/))%xm then
                "/*\n#{$1}"
              elsif @content =~ %r%Document-(?:const|global|variable):
                                   \s#{const_name}
                                   \s*?\n((?>.*?\*/))%xm then
                "/*\n#{$1}"
              else
                ''
              end

RDoc::Comment.new comment, @top_level
  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

RDoc::Comment.new comment, @top_level
  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 '1' == read
    rw << 'W' if '1' == 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$"([^"]+)"$/, '\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

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
      no_match, new_definition, new_comment = comment.text.split(/(\A.*):/)

if no_match and no_match.empty? then
        if new_definition.empty? then # Default to literal C definition
          new_definition = definition
        else
          new_definition.gsub!("\:", ":")
          new_definition.gsub!("\\", '\\')
        end

new_definition.sub!(/\A(\s+)/, '')

new_comment = "#{$1}#{new_comment.lstrip}"

new_comment = RDoc::Comment.new new_comment, @top_level

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 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
                            "(#{(1..p_count).map { |i| "p#{i}" }.join ', '})"
                          end

meth_obj.record_location @top_level
        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

##
  # Normalizes tabs in +body+

def handle_tab_width(body)
    if /\t/ =~ body
      tab_width = @options.tab_width
      body.split(/\n/).map do |line|
        1 while line.gsub!(/\t+/) do
          ' ' * (tab_width * $&.length - $`.length % tab_width)
        end && $~
        line
      end.join "\n"
    else
      body
    end
  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.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_modules
    do_classes
    do_missing

do_constants
    do_methods
    do_includes
    do_aliases
    do_attrs

deduplicate_call_seq

@store.add_c_variables self

@top_level
  end

end

Name	Type	Size	Permission	Last Modified	Actions
.	dir	-	0755	2024-03-03 10:43:27
..	dir	-	0755	2024-03-03 10:43:27
c.rb	text/x-ruby	34.83 KB	0644	2015-12-16 05:07:31
changelog.rb	text/x-ruby	4.76 KB	0644	2015-12-16 05:07:31
markdown.rb	text/x-ruby	475 B	0644	2015-12-16 05:07:31
rd.rb	text/x-ruby	439 B	0644	2015-12-16 05:07:31
ruby.rb	text/x-ruby	49 KB	0644	2015-12-16 05:07:31
ruby_tools.rb	text/x-ruby	2.96 KB	0644	2015-12-16 05:07:31
simple.rb	text/x-ruby	1.42 KB	0644	2015-12-16 05:07:31
text.rb	text/x-ruby	308 B	0644	2015-12-16 05:07:31