mirror of
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8d3537a85c
[ruby-core:24744] reapplied r24395. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27181 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
671 lines
20 KiB
Ruby
671 lines
20 KiB
Ruby
require 'rdoc/parser'
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require 'rdoc/parser/ruby'
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require 'rdoc/known_classes'
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##
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# We attempt to parse C extension files. Basically we look for
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# the standard patterns that you find in extensions: <tt>rb_define_class,
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# rb_define_method</tt> and so on. We also try to find the corresponding
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# C source for the methods and extract comments, but if we fail
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# we don't worry too much.
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#
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# The comments associated with a Ruby method are extracted from the C
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# comment block associated with the routine that _implements_ that
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# method, that is to say the method whose name is given in the
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# <tt>rb_define_method</tt> call. For example, you might write:
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#
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# /*
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# * Returns a new array that is a one-dimensional flattening of this
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# * array (recursively). That is, for every element that is an array,
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# * extract its elements into the new array.
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# *
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# * s = [ 1, 2, 3 ] #=> [1, 2, 3]
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# * t = [ 4, 5, 6, [7, 8] ] #=> [4, 5, 6, [7, 8]]
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# * a = [ s, t, 9, 10 ] #=> [[1, 2, 3], [4, 5, 6, [7, 8]], 9, 10]
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# * a.flatten #=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
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# */
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# static VALUE
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# rb_ary_flatten(ary)
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# VALUE ary;
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# {
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# ary = rb_obj_dup(ary);
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# rb_ary_flatten_bang(ary);
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# return ary;
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# }
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#
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# ...
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#
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# void
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# Init_Array()
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# {
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# ...
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# rb_define_method(rb_cArray, "flatten", rb_ary_flatten, 0);
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#
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# Here RDoc will determine from the rb_define_method line that there's a
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# method called "flatten" in class Array, and will look for the implementation
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# in the method rb_ary_flatten. It will then use the comment from that
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# method in the HTML output. This method must be in the same source file
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# as the rb_define_method.
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#
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# The comment blocks may include special directives:
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#
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# [Document-class: <i>name</i>]
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# This comment block is documentation for the given class. Use this
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# when the <tt>Init_xxx</tt> method is not named after the class.
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#
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# [Document-method: <i>name</i>]
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# This comment documents the named method. Use when RDoc cannot
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# automatically find the method from it's declaration
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#
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# [call-seq: <i>text up to an empty line</i>]
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# Because C source doesn't give descripive names to Ruby-level parameters,
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# you need to document the calling sequence explicitly
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#
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# In addition, RDoc assumes by default that the C method implementing a
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# Ruby function is in the same source file as the rb_define_method call.
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# If this isn't the case, add the comment:
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#
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# rb_define_method(....); // in filename
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#
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# As an example, we might have an extension that defines multiple classes
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# in its Init_xxx method. We could document them using
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#
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# /*
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# * Document-class: MyClass
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# *
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# * Encapsulate the writing and reading of the configuration
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# * file. ...
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# */
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#
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# /*
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# * Document-method: read_value
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# *
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# * call-seq:
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# * cfg.read_value(key) -> value
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# * cfg.read_value(key} { |key| } -> value
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# *
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# * Return the value corresponding to +key+ from the configuration.
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# * In the second form, if the key isn't found, invoke the
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# * block and return its value.
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# */
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class RDoc::Parser::C < RDoc::Parser
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parse_files_matching(/\.(?:([CcHh])\1?|c([+xp])\2|y)\z/)
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include RDoc::Text
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##
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# C file the parser is parsing
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attr_accessor :content
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##
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# Resets cross-file state. Call when parsing different projects that need
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# separate documentation.
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def self.reset
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@@enclosure_classes = {}
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@@known_bodies = {}
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end
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reset
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##
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# Prepare to parse a C file
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def initialize(top_level, file_name, content, options, stats)
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super
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@known_classes = RDoc::KNOWN_CLASSES.dup
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@content = handle_tab_width handle_ifdefs_in(@content)
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@classes = Hash.new
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@file_dir = File.dirname(@file_name)
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end
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def do_aliases
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@content.scan(%r{rb_define_alias\s*\(\s*(\w+),\s*"([^"]+)",\s*"([^"]+)"\s*\)}m) do
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|var_name, new_name, old_name|
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class_name = @known_classes[var_name] || var_name
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class_obj = find_class(var_name, class_name)
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as = class_obj.add_alias RDoc::Alias.new("", old_name, new_name, "")
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@stats.add_alias as
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end
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end
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def do_classes
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@content.scan(/(\w+)\s* = \s*rb_define_module\s*\(\s*"(\w+)"\s*\)/mx) do
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|var_name, class_name|
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handle_class_module(var_name, "module", class_name, nil, nil)
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end
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# The '.' lets us handle SWIG-generated files
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@content.scan(/([\w\.]+)\s* = \s*rb_define_class\s*
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\(
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\s*"(\w+)",
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\s*(\w+)\s*
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\)/mx) do |var_name, class_name, parent|
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handle_class_module(var_name, "class", class_name, parent, nil)
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end
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@content.scan(/(\w+)\s*=\s*boot_defclass\s*\(\s*"(\w+?)",\s*(\w+?)\s*\)/) do
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|var_name, class_name, parent|
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parent = nil if parent == "0"
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handle_class_module(var_name, "class", class_name, parent, nil)
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end
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@content.scan(/(\w+)\s* = \s*rb_define_module_under\s*
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\(
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\s*(\w+),
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\s*"(\w+)"
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\s*\)/mx) do |var_name, in_module, class_name|
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handle_class_module(var_name, "module", class_name, nil, in_module)
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end
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@content.scan(/([\w\.]+)\s* = \s*rb_define_class_under\s*
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\(
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\s*(\w+),
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\s*"(\w+)",
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\s*([\w\*\s\(\)\.\->]+)\s* # for SWIG
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\s*\)/mx) do |var_name, in_module, class_name, parent|
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handle_class_module(var_name, "class", class_name, parent, in_module)
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end
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end
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def do_constants
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@content.scan(%r{\Wrb_define_
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( variable |
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readonly_variable |
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const |
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global_const | )
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\s*\(
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(?:\s*(\w+),)?
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\s*"(\w+)",
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\s*(.*?)\s*\)\s*;
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}xm) do |type, var_name, const_name, definition|
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var_name = "rb_cObject" if !var_name or var_name == "rb_mKernel"
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handle_constants type, var_name, const_name, definition
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end
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end
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##
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# Look for includes of the form:
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#
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# rb_include_module(rb_cArray, rb_mEnumerable);
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def do_includes
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@content.scan(/rb_include_module\s*\(\s*(\w+?),\s*(\w+?)\s*\)/) do |c,m|
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if cls = @classes[c]
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m = @known_classes[m] || m
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cls.add_include RDoc::Include.new(m, "")
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end
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end
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end
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def do_methods
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@content.scan(%r{rb_define_
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(
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singleton_method |
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method |
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module_function |
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private_method
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)
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\s*\(\s*([\w\.]+),
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\s*"([^"]+)",
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\s*(?:RUBY_METHOD_FUNC\(|VALUEFUNC\()?(\w+)\)?,
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\s*(-?\w+)\s*\)
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(?:;\s*/[*/]\s+in\s+(\w+?\.[cy]))?
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}xm) do
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|type, var_name, meth_name, meth_body, param_count, source_file|
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# Ignore top-object and weird struct.c dynamic stuff
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next if var_name == "ruby_top_self"
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next if var_name == "nstr"
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next if var_name == "envtbl"
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next if var_name == "argf" # it'd be nice to handle this one
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var_name = "rb_cObject" if var_name == "rb_mKernel"
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handle_method(type, var_name, meth_name,
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meth_body, param_count, source_file)
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end
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@content.scan(%r{rb_define_attr\(
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\s*([\w\.]+),
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\s*"([^"]+)",
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\s*(\d+),
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\s*(\d+)\s*\);
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}xm) do |var_name, attr_name, attr_reader, attr_writer|
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#var_name = "rb_cObject" if var_name == "rb_mKernel"
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handle_attr(var_name, attr_name,
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attr_reader.to_i != 0,
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attr_writer.to_i != 0)
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end
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@content.scan(%r{rb_define_global_function\s*\(
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\s*"([^"]+)",
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\s*(?:RUBY_METHOD_FUNC\(|VALUEFUNC\()?(\w+)\)?,
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\s*(-?\w+)\s*\)
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(?:;\s*/[*/]\s+in\s+(\w+?\.[cy]))?
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}xm) do |meth_name, meth_body, param_count, source_file|
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handle_method("method", "rb_mKernel", meth_name,
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meth_body, param_count, source_file)
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end
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@content.scan(/define_filetest_function\s*\(
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\s*"([^"]+)",
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\s*(?:RUBY_METHOD_FUNC\(|VALUEFUNC\()?(\w+)\)?,
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\s*(-?\w+)\s*\)/xm) do
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|meth_name, meth_body, param_count|
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handle_method("method", "rb_mFileTest", meth_name, meth_body, param_count)
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handle_method("singleton_method", "rb_cFile", meth_name, meth_body, param_count)
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end
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end
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def find_attr_comment(attr_name)
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if @content =~ %r{((?>/\*.*?\*/\s+))
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rb_define_attr\((?:\s*(\w+),)?\s*"#{attr_name}"\s*,.*?\)\s*;}xmi
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$1
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elsif @content =~ %r{Document-attr:\s#{attr_name}\s*?\n((?>.*?\*/))}m
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$1
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else
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''
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end
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end
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##
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# Find the C code corresponding to a Ruby method
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def find_body(class_name, meth_name, meth_obj, body, quiet = false)
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case body
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when %r"((?>/\*.*?\*/\s*))((?:(?:static|SWIGINTERN)\s+)?(?:intern\s+)?VALUE\s+#{meth_name}
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\s*(\([^)]*\))([^;]|$))"xm
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comment = $1
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body_text = $2
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params = $3
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remove_private_comments comment if comment
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# see if we can find the whole body
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re = Regexp.escape(body_text) + '[^(]*^\{.*?^\}'
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body_text = $& if /#{re}/m =~ body
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# The comment block may have been overridden with a 'Document-method'
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# block. This happens in the interpreter when multiple methods are
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# vectored through to the same C method but those methods are logically
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# distinct (for example Kernel.hash and Kernel.object_id share the same
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# implementation
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override_comment = find_override_comment class_name, meth_obj.name
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comment = override_comment if override_comment
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find_modifiers comment, meth_obj if comment
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# meth_obj.params = params
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meth_obj.start_collecting_tokens
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tk = RDoc::RubyToken::Token.new nil, 1, 1
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tk.set_text body_text
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meth_obj.add_token tk
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meth_obj.comment = strip_stars comment
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when %r{((?>/\*.*?\*/\s*))^\s*(\#\s*define\s+#{meth_name}\s+(\w+))}m
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comment = $1
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body_text = $2
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find_body class_name, $3, meth_obj, body, true
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find_modifiers comment, meth_obj
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meth_obj.start_collecting_tokens
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tk = RDoc::RubyToken::Token.new nil, 1, 1
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tk.set_text body_text
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meth_obj.add_token tk
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meth_obj.comment = strip_stars(comment) + meth_obj.comment.to_s
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when %r{^\s*\#\s*define\s+#{meth_name}\s+(\w+)}m
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unless find_body(class_name, $1, meth_obj, body, true)
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warn "No definition for #{meth_name}" unless @options.quiet
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return false
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end
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else
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# No body, but might still have an override comment
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comment = find_override_comment(class_name, meth_obj.name)
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if comment
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find_modifiers(comment, meth_obj)
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meth_obj.comment = strip_stars comment
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else
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warn "No definition for #{meth_name}" unless @options.quiet
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return false
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end
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end
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true
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end
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def find_class(raw_name, name)
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unless @classes[raw_name]
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if raw_name =~ /^rb_m/
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container = @top_level.add_module RDoc::NormalModule, name
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else
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container = @top_level.add_class RDoc::NormalClass, name
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end
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container.record_location @top_level
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@classes[raw_name] = container
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end
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@classes[raw_name]
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end
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##
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# Look for class or module documentation above Init_+class_name+(void),
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# in a Document-class +class_name+ (or module) comment or above an
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# rb_define_class (or module). If a comment is supplied above a matching
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# Init_ and a rb_define_class the Init_ comment is used.
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#
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# /*
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# * This is a comment for Foo
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# */
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# Init_Foo(void) {
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# VALUE cFoo = rb_define_class("Foo", rb_cObject);
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# }
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#
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# /*
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# * Document-class: Foo
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# * This is a comment for Foo
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# */
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# Init_foo(void) {
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# VALUE cFoo = rb_define_class("Foo", rb_cObject);
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# }
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#
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# /*
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# * This is a comment for Foo
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# */
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# VALUE cFoo = rb_define_class("Foo", rb_cObject);
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def find_class_comment(class_name, class_mod)
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comment = nil
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if @content =~ %r{
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((?>/\*.*?\*/\s+))
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(static\s+)?
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void\s+
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Init_#{class_name}\s*(?:_\(\s*)?\(\s*(?:void\s*)?\)}xmi then # )
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comment = $1
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elsif @content =~ %r{Document-(?:class|module):\s+#{class_name}\s*?(?:<\s+[:,\w]+)?\n((?>.*?\*/))}m then
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comment = $1
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elsif @content =~ %r{((?>/\*.*?\*/\s+))
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([\w\.\s]+\s* = \s+)?rb_define_(class|module).*?"(#{class_name})"}xm then
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comment = $1
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end
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class_mod.comment = strip_stars comment if comment
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end
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##
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# Finds a comment matching +type+ and +const_name+ either above the
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# comment or in the matching Document- section.
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def find_const_comment(type, const_name)
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if @content =~ %r{((?>^\s*/\*.*?\*/\s+))
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rb_define_#{type}\((?:\s*(\w+),)?\s*"#{const_name}"\s*,.*?\)\s*;}xmi
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$1
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elsif @content =~ %r{Document-(?:const|global|variable):\s#{const_name}\s*?\n((?>.*?\*/))}m
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$1
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else
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''
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end
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end
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##
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# If the comment block contains a section that looks like:
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#
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# call-seq:
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# Array.new
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# Array.new(10)
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#
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# use it for the parameters.
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def find_modifiers(comment, meth_obj)
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if comment.sub!(/:nodoc:\s*^\s*\*?\s*$/m, '') or
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comment.sub!(/\A\/\*\s*:nodoc:\s*\*\/\Z/, '')
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meth_obj.document_self = false
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end
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if comment.sub!(/call-seq:(.*?)^\s*\*?\s*$/m, '') or
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comment.sub!(/\A\/\*\s*call-seq:(.*?)\*\/\Z/, '')
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seq = $1
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seq.gsub!(/^\s*\*\s*/, '')
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meth_obj.call_seq = seq
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end
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end
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def find_override_comment(class_name, meth_name)
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name = Regexp.escape(meth_name)
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if @content =~ %r{Document-method:\s+#{class_name}(?:\.|::|#)#{name}\s*?\n((?>.*?\*/))}m then
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$1
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elsif @content =~ %r{Document-method:\s#{name}\s*?\n((?>.*?\*/))}m then
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$1
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end
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end
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def handle_attr(var_name, attr_name, reader, writer)
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rw = ''
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rw << 'R' if reader
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rw << 'W' if writer
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class_name = @known_classes[var_name]
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return unless class_name
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class_obj = find_class(var_name, class_name)
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if class_obj
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comment = find_attr_comment(attr_name)
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comment = strip_stars comment
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att = RDoc::Attr.new '', attr_name, rw, comment
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@stats.add_method att
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class_obj.add_attribute(att)
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end
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end
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def handle_class_module(var_name, type, class_name, parent, in_module)
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parent_name = @known_classes[parent] || parent
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if in_module then
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enclosure = @classes[in_module] || @@enclosure_classes[in_module]
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if enclosure.nil? and enclosure = @known_classes[in_module] then
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type = /^rb_m/ =~ in_module ? "module" : "class"
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handle_class_module in_module, type, enclosure, nil, nil
|
|
enclosure = @classes[in_module]
|
|
end
|
|
|
|
unless enclosure then
|
|
warn("Enclosing class/module '#{in_module}' for #{type} #{class_name} not known")
|
|
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
|
|
|
|
@stats.add_class cm
|
|
else
|
|
cm = enclosure.add_module RDoc::NormalModule, class_name
|
|
@stats.add_module cm
|
|
end
|
|
|
|
cm.record_location enclosure.top_level
|
|
|
|
find_class_comment cm.full_name, cm
|
|
|
|
@classes[var_name] = cm
|
|
@@enclosure_classes[var_name] = cm
|
|
@known_classes[var_name] = cm.full_name
|
|
end
|
|
|
|
##
|
|
# Adds constant comments. By providing some_value: at the start ofthe
|
|
# 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 +INT2FIX(300)+ 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
|
|
warn "Enclosing class/module #{const_name.inspect} not known"
|
|
return
|
|
end
|
|
|
|
comment = find_const_comment type, const_name
|
|
comment = strip_stars comment
|
|
comment = normalize_comment comment
|
|
|
|
# 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
|
|
elements = comment.split ':'
|
|
|
|
if elements.nil? or elements.empty? then
|
|
con = RDoc::Constant.new const_name, definition, comment
|
|
else
|
|
new_definition = elements[0..-2].join(':')
|
|
|
|
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 = if $1.nil? then
|
|
elements.last.lstrip
|
|
else
|
|
"#{$1}#{elements.last.lstrip}"
|
|
end
|
|
|
|
con = RDoc::Constant.new const_name, new_definition, new_comment
|
|
end
|
|
else
|
|
con = RDoc::Constant.new const_name, definition, comment
|
|
end
|
|
|
|
@stats.add_constant con
|
|
class_obj.add_constant con
|
|
end
|
|
|
|
##
|
|
# Removes #ifdefs that would otherwise confuse us
|
|
|
|
def handle_ifdefs_in(body)
|
|
body.gsub(/^#ifdef HAVE_PROTOTYPES.*?#else.*?\n(.*?)#endif.*?\n/m, '\1')
|
|
end
|
|
|
|
def handle_method(type, var_name, meth_name, meth_body, param_count,
|
|
source_file = nil)
|
|
class_name = @known_classes[var_name]
|
|
|
|
return unless class_name
|
|
|
|
class_obj = find_class var_name, class_name
|
|
|
|
if class_obj then
|
|
if meth_name == "initialize" then
|
|
meth_name = "new"
|
|
type = "singleton_method"
|
|
end
|
|
|
|
meth_obj = RDoc::AnyMethod.new '', meth_name
|
|
meth_obj.singleton = %w[singleton_method module_function].include? type
|
|
|
|
p_count = (Integer(param_count) rescue -1)
|
|
|
|
if p_count < 0
|
|
meth_obj.params = "(...)"
|
|
elsif p_count == 0
|
|
meth_obj.params = "()"
|
|
else
|
|
meth_obj.params = "(" + (1..p_count).map{|i| "p#{i}"}.join(", ") + ")"
|
|
end
|
|
|
|
if source_file and File.exist? source_file then
|
|
file_name = File.join(@file_dir, source_file)
|
|
body = (@@known_bodies[source_file] ||= File.read(file_name))
|
|
elsif source_file then
|
|
warn "unknown source file #{source_file}"
|
|
else
|
|
body = @content
|
|
end
|
|
|
|
if find_body(class_name, meth_body, meth_obj, body) and meth_obj.document_self then
|
|
class_obj.add_method meth_obj
|
|
@stats.add_method meth_obj
|
|
meth_obj.visibility = :private if 'private_method' == type
|
|
end
|
|
end
|
|
end
|
|
|
|
def handle_tab_width(body)
|
|
if /\t/ =~ body
|
|
tab_width = @options.tab_width
|
|
body.split(/\n/).map do |line|
|
|
1 while line.gsub!(/\t+/) { ' ' * (tab_width*$&.length - $`.length % tab_width)} && $~ #`
|
|
line
|
|
end .join("\n")
|
|
else
|
|
body
|
|
end
|
|
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
|
|
|
|
def remove_private_comments(comment)
|
|
comment.gsub!(/\/?\*--\n(.*?)\/?\*\+\+/m, '')
|
|
comment.sub!(/\/?\*--\n.*/m, '')
|
|
end
|
|
|
|
##
|
|
# Extract the classes/modules and methods from a C file and return the
|
|
# corresponding top-level object
|
|
|
|
def scan
|
|
remove_commented_out_lines
|
|
do_classes
|
|
do_constants
|
|
do_methods
|
|
do_includes
|
|
do_aliases
|
|
@top_level
|
|
end
|
|
|
|
end
|
|
|