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da99e407fb
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5234 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
370 lines
12 KiB
Ruby
370 lines
12 KiB
Ruby
# 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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# C classes can be diagramed (see /tc/dl/ruby/ruby/error.c), and RDoc
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# integrates C and Ruby source into one tree
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# Classes and modules built in to the interpreter. We need
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# these to define superclasses of user objects
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require "rdoc/code_objects"
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require "rdoc/parsers/parserfactory"
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module RDoc
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KNOWN_CLASSES = {
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"rb_cObject" => "Object",
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"rb_cArray" => "Array",
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"rb_cBignum" => "Bignum",
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"rb_cClass" => "Class",
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"rb_cDir" => "Dir",
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"rb_cData" => "Data",
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"rb_cFalseClass" => "FalseClass",
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"rb_cFile" => "File",
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"rb_cFixnum" => "Fixnum",
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"rb_cFloat" => "Float",
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"rb_cHash" => "Hash",
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"rb_cInteger" => "Integer",
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"rb_cIO" => "IO",
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"rb_cModule" => "Module",
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"rb_cNilClass" => "NilClass",
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"rb_cNumeric" => "Numeric",
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"rb_cProc" => "Proc",
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"rb_cRange" => "Range",
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"rb_cRegexp" => "Regexp",
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"rb_cString" => "String",
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"rb_cSymbol" => "Symbol",
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"rb_cThread" => "Thread",
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"rb_cTime" => "Time",
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"rb_cTrueClass" => "TrueClass",
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"rb_cStruct" => "Struct",
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"rb_eException" => "Exception",
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"rb_eStandardError" => "StandardError",
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"rb_eSystemExit" => "SystemExit",
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"rb_eInterrupt" => "Interrupt",
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"rb_eSignal" => "Signal",
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"rb_eFatal" => "Fatal",
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"rb_eArgError" => "ArgError",
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"rb_eEOFError" => "EOFError",
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"rb_eIndexError" => "IndexError",
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"rb_eRangeError" => "RangeError",
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"rb_eIOError" => "IOError",
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"rb_eRuntimeError" => "RuntimeError",
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"rb_eSecurityError" => "SecurityError",
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"rb_eSystemCallError" => "SystemCallError",
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"rb_eTypeError" => "TypeError",
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"rb_eZeroDivError" => "ZeroDivError",
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"rb_eNotImpError" => "NotImpError",
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"rb_eNoMemError" => "NoMemError",
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"rb_eFloatDomainError" => "FloatDomainError",
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"rb_eScriptError" => "ScriptError",
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"rb_eNameError" => "NameError",
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"rb_eSyntaxError" => "SyntaxError",
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"rb_eLoadError" => "LoadError",
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"rb_mKernel" => "Kernel",
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"rb_mComparable" => "Comparable",
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"rb_mEnumerable" => "Enumerable",
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"rb_mPrecision" => "Precision",
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"rb_mErrno" => "Errno",
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"rb_mFileTest" => "FileTest",
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"rb_mGC" => "GC",
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"rb_mMath" => "Math",
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"rb_mProcess" => "Process"
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}
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# See rdoc/c_parse.rb
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class C_Parser
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extend ParserFactory
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parse_files_matching(/\.(c|cc|cpp|CC)$/)
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# prepare to parse a C file
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def initialize(top_level, file_name, body, options)
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@known_classes = KNOWN_CLASSES.dup
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@body = body
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@options = options
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@top_level = top_level
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@classes = Hash.new
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end
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# Extract the classes/modules and methods from a C file
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# and return the corresponding top-level object
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def scan
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remove_commented_out_lines
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do_classes
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do_methods
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do_includes
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@top_level
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end
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#######
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private
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#######
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# remove lines that are commented out that might otherwise get
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# picked up when scanning for classes and methods
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def remove_commented_out_lines
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@body.gsub!(%r{//.*rb_define_}, '//')
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end
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def handle_class_module(var_name, class_mod, class_name, parent, in_module)
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parent_name = @known_classes[parent] || parent
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if in_module
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enclosure = @classes[in_module]
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unless enclosure
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$stderr.puts("Enclosing class/module '#{in_module}' for " +
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"#{class_mod} #{class_name} not known")
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return
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end
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else
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enclosure = @top_level
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end
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if class_mod == "class"
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cm = enclosure.add_class(NormalClass, class_name, parent_name)
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else
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cm = enclosure.add_module(NormalModule, class_name)
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end
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cm.record_location(enclosure.toplevel)
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find_class_comment(cm.full_name, cm)
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@classes[var_name] = cm
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@known_classes[var_name] = cm.full_name
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end
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def find_class_comment(class_name, class_meth)
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comment = nil
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if @body =~ %r{((?>/\*.*?\*/\s+))
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(static\s+)?void\s+Init_#{class_name}\s*\(\)}xm
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comment = $1
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elsif @body =~ %r{Document-(class|module):\s#{class_name}.*?\n((?>.*?\*/))}m
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comment = $2
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end
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class_meth.comment = mangle_comment(comment) if comment
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end
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def do_classes
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@body.scan(/(\w+)\s* = \s*rb_define_module\(\s*"(\w+)"\s*\)/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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@body.scan(/(\w+)\s* = \s*rb_define_class
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\(
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\s*"(\w+)",
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\s*(\w+)\s*
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\)/mx) do
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|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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@body.scan(/(\w+)\s*=\s*boot_defclass\(\s*"(\w+?)",\s*(\w+?)\)/) 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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@body.scan(/(\w+)\s* = \s*rb_define_module_under
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\(
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\s*(\w+),
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\s*"(\w+)"
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\)/mx) do
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|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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@body.scan(/(\w+)\s* = \s*rb_define_class_under
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\(
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\s*(\w+),
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\s*"(\w+)",
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\s*(\w+)\s*
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\)/mx) do
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|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_methods
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@body.scan(/rb_define_(singleton_method|method|module_function)\(\s*(\w+),
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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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|type, var_name, meth_name, meth_body, param_count|
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next if meth_name == "initialize_copy"
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handle_method(type, var_name, meth_name, meth_body, param_count)
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end
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@body.scan(/rb_define_global_function\(
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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_mKernel", meth_name, meth_body, param_count)
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end
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@body.scan(/define_filetest_function\(
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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 handle_method(type, var_name, meth_name, meth_body, param_count)
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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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if class_obj
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if meth_name == "initialize"
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meth_name = "new"
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type = "singleton_method"
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end
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meth_obj = AnyMethod.new("", meth_name)
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meth_obj.singleton = type == "singleton_method"
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p_count = (Integer(param_count) rescue -1)
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if p_count < 0
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meth_obj.params = "(...)"
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elsif p_count == 0
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meth_obj.params = "()"
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else
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meth_obj.params = "(" +
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(1..p_count).map{|i| "p#{i}"}.join(", ") +
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")"
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end
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find_body(meth_body, meth_obj)
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class_obj.add_method(meth_obj)
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end
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end
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# Find the C code corresponding to a c method
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def find_body(meth_name, meth_obj)
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if @body =~ %r{((?>/\*.*?\*/\s+))(static\s+)?VALUE\s+#{meth_name}
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\s*(\(.*?\)).*?^}xm
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comment, params = $1, $3
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body_text = $&
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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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if Regexp.new(re, Regexp::MULTILINE).match(@body)
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body_text = $&
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end
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# If the comment block contains a section that looks like
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# call-seq:
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# Array.new
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# Array.new(10)
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# use it for the parameters
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if comment.sub!(/call-seq:(.*?)^\s*\*?\s*$/m, '')
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seq = $1
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seq.gsub!(/^\s*\*\s*/, '')
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meth_obj.params = "!verb!" + seq
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end
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# meth_obj.params = params
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meth_obj.start_collecting_tokens
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meth_obj.add_token(RubyToken::Token.new(1,1).set_text(body_text))
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meth_obj.comment = mangle_comment(comment)
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end
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end
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# Look for includes of the form
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# rb_include_module(rb_cArray, rb_mEnumerable);
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def do_includes
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@body.scan(/rb_include_module\(\s*(\w+?),\s*(\w+?)\s*\)/) 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(Include.new(m, ""))
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end
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end
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end
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# Remove the /*'s and leading asterisks from C comments
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def mangle_comment(comment)
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comment.sub!(%r{/\*+}) { " " * $&.length }
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comment.sub!(%r{\*+/}) { " " * $&.length }
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comment.gsub!(/^[ \t]*\*/m) { " " * $&.length }
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comment
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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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@classes[raw_name] = @top_level.add_module(NormalModule, name)
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else
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@classes[raw_name] = @top_level.add_class(NormalClass, name, nil)
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end
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end
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@classes[raw_name]
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end
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end
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end
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