Class: Rubber::CRScanner

Inherits:
Object
  • Object
show all
Defined in:
lib/rubber/scanner.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file) ⇒ CRScanner

Returns a new instance of CRScanner.



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# File 'lib/rubber/scanner.rb', line 71

def initialize(file)
  @file = file
  @ext = File::basename(file).gsub(/\..*$/, '')
  @nested_functions = {}
  @functions = {}
  @modules = {}
  @classes = {}
  @calls = []
  @allocs = []
  @options = Options.new
  # Default settings
  @options.glib= true
  @options.gtk= true
  @options.gnu= false
  @current_file = file
end

Instance Attribute Details

#allocs ⇒ Object (readonly)

Returns the value of attribute allocs.



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# File 'lib/rubber/scanner.rb', line 69

def allocs
  @allocs
end

#calls ⇒ Object (readonly)

Returns the value of attribute calls.



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# File 'lib/rubber/scanner.rb', line 69

def calls
  @calls
end

#classes ⇒ Object (readonly)

Returns the value of attribute classes.



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# File 'lib/rubber/scanner.rb', line 69

def classes
  @classes
end

#current_file ⇒ Object (readonly)

Returns the value of attribute current_file.



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# File 'lib/rubber/scanner.rb', line 87

def current_file
  @current_file
end

#defs ⇒ Object (readonly)

Returns the value of attribute defs.



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# File 'lib/rubber/scanner.rb', line 69

def defs
  @defs
end

#doc ⇒ Object (readonly)

Returns the value of attribute doc.



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# File 'lib/rubber/scanner.rb', line 69

def doc
  @doc
end

#ext ⇒ Object (readonly)

Returns the value of attribute ext.



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# File 'lib/rubber/scanner.rb', line 69

def ext
  @ext
end

#file ⇒ Object (readonly)

Returns the value of attribute file.



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# File 'lib/rubber/scanner.rb', line 69

def file
  @file
end

#functions ⇒ Object (readonly)

Returns the value of attribute functions.



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# File 'lib/rubber/scanner.rb', line 69

def functions
  @functions
end

#inc_dirs ⇒ Object (readonly)

Returns the value of attribute inc_dirs.



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# File 'lib/rubber/scanner.rb', line 69

def inc_dirs
  @inc_dirs
end

#incs ⇒ Object (readonly)

Returns the value of attribute incs.



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# File 'lib/rubber/scanner.rb', line 69

def incs
  @incs
end

#lib_dirs ⇒ Object (readonly)

Returns the value of attribute lib_dirs.



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# File 'lib/rubber/scanner.rb', line 69

def lib_dirs
  @lib_dirs
end

#libs ⇒ Object (readonly)

Returns the value of attribute libs.



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# File 'lib/rubber/scanner.rb', line 69

def libs
  @libs
end

#nested_functions ⇒ Object (readonly)

Returns the value of attribute nested_functions.



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# File 'lib/rubber/scanner.rb', line 69

def nested_functions
  @nested_functions
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/rubber/scanner.rb', line 70

def options
  @options
end

#pkgs ⇒ Object (readonly)

Returns the value of attribute pkgs.



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# File 'lib/rubber/scanner.rb', line 69

def pkgs
  @pkgs
end

#post_init_code ⇒ Object (readonly)

Returns the value of attribute post_init_code.



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# File 'lib/rubber/scanner.rb', line 69

def post_init_code
  @post_init_code
end

#pre_init_code ⇒ Object (readonly)

Returns the value of attribute pre_init_code.



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# File 'lib/rubber/scanner.rb', line 69

def pre_init_code
  @pre_init_code
end

#raw ⇒ Object (readonly)

Returns the value of attribute raw.



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# File 'lib/rubber/scanner.rb', line 69

def raw
  @raw
end

#stack ⇒ Object (readonly)

Returns the value of attribute stack.



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# File 'lib/rubber/scanner.rb', line 69

def stack
  @stack
end

#state ⇒ Object

Returns the value of attribute state.



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# File 'lib/rubber/scanner.rb', line 115

def state
  @state
end

Instance Method Details

#_scan(fp) ⇒ Object 



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# File 'lib/rubber/scanner.rb', line 128

def _scan(fp)
  @lines = IO.readlines(@file)
  @str = TokenStringScanner.new(@string = @lines.join)
  tokens = []
  @state = ScanState.new(0,0,false,0)
  @stack = [C_RootModule.new]
  func = nil
  until @str.empty?
    ######## Doc
    if @str.skip(/=begin([ \t][^\n]*)?\n/) # skip =begin/=end blocks
      lines = @str.scan_until(/\n=end([ \t].*)?/).split("\n")
      lines.pop
      if state.in_func
        (func.doc ||= "") << lines.join("\n")
      elsif @class and not @class.kind_of?(C_RootModule)
        (@class.doc ||= "") << lines.join("\n")
      else
        (@doc ||= "") << lines.join("\n")
      end

      ######## Config

    elsif @str.skip(/%\{/) # Scan raw
      (@raw ||= "") << @str.scan_pc_block
    elsif @str.skip(/%pre_init\{/) # Scan raw
      (@pre_init_code ||= "") << @str.scan_pc_block
    elsif @str.skip(/%post_init\{/) # Scan raw
      (@post_init_code ||= "") << @str.scan_pc_block
    elsif @str.skip_ws # skip
      func.text += " " if state.in_func
    elsif @str.skip(/%name */) # Extension name
      @ext = @str.scan_literal
    elsif @str.skip(/%min-version */)
      @version = @str.scan(/([0-9]+)\.([0-9]+)\.([0-9]+)/)
      version = [1,2,3].map{|i|@str[i].to_i}
      Rubber::VERSION.each_with_index do |ver,idx|
        if ver < version[idx]
          misc_error "This version of rubber-generate (#{Rubber::VERSION}) is too old: #{@file} requires version #{version.map{|i|i.to_s}.join('.')}", false
        end
      end
    elsif @str.skip(/%pkg-config\s*([-a-z.0-9+]+)/) # pkg-config library
      @pkgs ||= []
      @pkgs << @str[1]
    elsif @str.skip(/%include_dir\s+(.+)\n/) # Include dirs
      @inc_dirs ||= []
      @inc_dirs << @str[1].strip
    elsif @str.skip(/%lib_dir\s+(.+)\n/) # Library dir
      @lib_dirs ||= []
      @lib_dirs << @str[1].strip
    elsif @str.skip(/%include\s+(.+)\n/) # Include file
      @incs ||= []
      @incs << @str[1].strip
    elsif @str.skip(/%option +([a-z]+)=(yes|no)\n/) # Option
      case @str[1]
      when 'glib', 'gtk', 'gnu'
        @options[@str[1]] = (@str[2] == 'yes')
      else
        syntax_error "Unknown option #{@str[1]}"
      end
    elsif @str.skip(/%lib\s+(.+)\n/) # Skip single-line comment
      @libs ||= []
      @libs << @str[1].strip
    elsif @str.skip(/%define\s+(.+)\n/) # Skip single-line comment
      @defs ||= []
      @defs << @str[1].strip
    elsif @str.skip(/%equiv[a-z]*\s+([^=\n]+)=([^=\n]+)\n/) # Skip single-line comment
      $equivalents[@str[1].gsub(/ /,'').strip] = @str[2].gsub(/ /,'').strip
    elsif @str.skip(/%map\s+([^->]+?)\>([^:]+):([^@\n]+) *@? *(.*)\n/) # Skip single-line comment
      from, to, code = *[@str[1], @str[2], @str[3]].collect { |i| i.strip }
      free_code = @str[4]
      from.gsub!(/ /,'')
      to.gsub!(/ /,'')
      puts "Mapping #{from} -> #{to}"
      ($custom_maps[from] ||= {})[to] = code
      $custom_frees[to] = free_code
    elsif state.in_class > 0 and state.in_func == false and @str.skip(/%flag\s+([a-z0-9_A-Z]+)/)
      flag = ("flag_"+@str[1]+"=").intern
      if stack.last.respond_to?(flag)
        stack.last.__send__(flag, true)
      else
        syntax_error "%flags directive cannot be used here (#{stack.last.class} doesn't respond to #{flag})"
      end
    elsif state.in_class > 0 and state.in_func == false and @str.skip(/%feature\s+([a-z0-9_A-Z]+)/)
      flag = ("feature_"+@str[1]).intern
      @str.skip(/\s+/)
      args = []
      if @str.skip(/\(/)
        args = @str.scan_until(/\)/)[0..-2].split(/, */).map { |i| i.strip }
      end
      @str.skip(/;/)
      if stack.last.respond_to?(flag)
        stack.last.__send__(flag, *args)
      else
        syntax_error "%feature '#{@str[1]}' directive cannot be used here (#{stack.last.class} doesn't support it)"
      end
    elsif @str.skip(/%/) # Skip single-line comment
      @str.skip_until(/\n/)


      ####### Comments

    elsif state.in_func == false and @str.skip(/#.*/) # Comment

    elsif state.in_func == false and @str.skip(/\/\/.*/) # Comment

    elsif state.in_func == false and @str.skip(/\/\*(.|\n)*\*\//) # Multi-line Comment


      ####### Code

    elsif txt = @str.scan(/['"]/) #' Skip quoted string
      txt += @str.scan_until(/(^|[^\\])#{txt}/) # Skip until unescaped quote
      func.text += txt if state.in_func
    elsif state.in_func == false and @str.skip(/module(?= )/x) # Module defn
      @str.skip(/\s+/)
      name = @str.scan(/[A-Z][a-z_0-9A-Z]*/)
      @classes[name] = C_Module.new(name, [], [], [])
      @classes[name].parent = stack.last
      stack.last.classes.push(@classes[name])
      stack.push(@class = @classes[name])
      puts "module "+ @class.fullname + "-#{@class.name}"
      state.in_class += 1
    elsif state.in_func == false and @str.skip(/class(?= )/x) # Class defn
      @str.skip_ws
      name = @str.scan_constant
      superclass = nil
      @str.skip(/\s*/)
      if @str.skip(/</)
        @str.skip_ws
        superclass = @str.scan_constant
      end
      @classes[name] = C_Class.new(name, superclass, [], [], [])
      @classes[name].parent = stack.last
      stack.last.classes.push(@classes[name])
      stack.push(@class = @classes[name])
      puts "class "+ @class.fullname
      state.in_class += 1

    elsif state.in_func == false and @str.skip(/struct(?= )/x) # Ruby Struct
      @str.skip_ws
      name = @str.scan_constant
      @str.skip_ws
      if @str.skip(/\(/)
        args = @str.scan_until(/\)/)[0..-2].split(/, */).collect { |i| i.strip }
      end
      # NB. struct Name(arg0...argN)
      if @str.skip(/\s*;/)
        stack.last.classes.push(C_Struct.new(name, args, stack.last))
      else
        @classes[name] = C_Struct.new(name, args, stack.last)
        stack.last.classes.push(@classes[name])
        stack.push(@class = @classes[name])
        puts "struct "+ @class.fullname
        state.in_class += 1
      end
    elsif state.in_func == false and @str.skip(/gcpool(?= )/x) # GC Pool
      @str.skip_ws
      name = @str.scan_literal
      puts "GCPool #{name}"
      stack.first.classes.push(C_GCRefPool.new(name))

    elsif state.in_func == false and @str.skip(/(enum|flags)(?= )/x) # C Enum as module wrapper
      what = @str[1]
      @str.skip_ws
      name = @str.scan_constant
      @str.skip_ws
      if @str.skip(/\(/)
        args = @str.scan_until(/\)/)[0..-2].split(/, */).collect { |i| i.strip }
      end
      if what == "flags"
        stack.last.classes.push(C_Flags.new(name, args, stack.last))
      else
        stack.last.classes.push(C_Enum.new(name, args, stack.last))
      end

    elsif state.in_func == false and @str.skip(/(genum|gflags)(?= )/x) # C GEnum as module wrapper
      what = @str[1]
      @str.skip_ws
      name = @str.scan_constant
      @str.skip_ws
      g_type = @str.scan_upcase_constant
      @str.skip_ws
      prefix = @str.scan(/(prefix=)?[A-Z][_0-9A-Z]*/i).to_s.sub(/^prefix=/i,'')
      @str.skip_ws
      define_on_self = @str.scan(/define_on_self/)
      @str.skip(/\s*;/)
      if what == "gflags"
        obj = C_GFlags.new(name, g_type, prefix, stack.last)
      else
        obj = C_GEnum.new(name, g_type, prefix, stack.last)
        obj.define_on_self = !! define_on_self;
      end
      stack.last.classes.push(obj)
    elsif state.in_func == false and @str.skip(/(gobject|ginterface|gboxed)(?= )/x) # Class defn
      type=@str[1]
      @str.skip_ws
      name = @str.scan_constant
      superclass = nil
      @str.skip_ws
      if @str.skip(/\</)
        @str.skip_ws
        gtype = @str.scan_upcase_constant
      end
      @str.skip_ws
      if @str.skip(/:/)
        @str.skip_ws
        gparent_class = @str.scan(/[A-Z_:a-z0-9]+/)
      end
      case type
      when "gobject"
        @classes[name] = C_GObject.new(name, gtype, [], [], [])
      when "ginterface"
        @classes[name] = C_GInterface.new(name, gtype, [], [], [])
      when "gboxed"
        @classes[name] = C_GBoxed.new(name, gtype, [], [], [])
      else
        syntax_error "#{name} is not a GObject or GInterface..."
      end
      @classes[name].gparent_class = gparent_class
      @classes[name].parent = stack.last
      stack.last.classes.push(@classes[name])
      stack.push(@class = @classes[name])
      puts "class "+ @class.fullname
      state.in_class += 1
    elsif @str.scan(/@type\s+/)
      type = @str.scan_literal
      prev = stack.last
      if prev.is_a?(C_GObject)
        #  p c_type, self
        puts "Converting #{type}* to & from VALUE"
        prev.c_type_name = type
        ($custom_maps[type+'*'] ||= {})["VALUE"] = "GOBJ2RVAL(%%)"
        ($custom_maps["VALUE"] ||= {})[type+'*'] = "RVAL2GOBJ(%%)"
      elsif prev.is_a?(C_GBoxed)
        prev.c_type_name = type

        ($custom_maps[type+'*'] ||= {})["VALUE"] = "BOXED2RVAL(%%, #{prev.superclass})"
        ($custom_maps["VALUE"] ||= {})[type+'*'] = "RVAL2BOXED(%%, #{prev.superclass})"
      else
        # Invalid type directive
      end
    elsif @str.skip(/end(?=\s)/x)
      last = stack.pop
      puts "#{last.class} - #{last.name}"
      case last
      when C_Module, C_Class, C_Enum, C_Flags, C_Struct, C_GObject, C_GInterface, C_GBoxed
        state.in_class -= 1
        @class = stack.last
      when C_Function
        state.in_func = false
      else
        STDERR.puts "Remaining code: #{@str.rest}"
        STDERR.puts "Defined Classes: #{@classes.keys.join(', ')}"
        p stack
        syntax_error "Invalid stack entry #{last.class}"
      end
    elsif @str.skip(/alias\s+:([A-Za-z0-9_]*[\[\]]{0,2}[?!=]?)\s+:([A-Za-z0-9_]*[\[\]]{0,2}[?!=]?)/) # Alias
      @class.add_alias(@str[1], @str[2]) if @class.respond_to?(:add_alias)
    elsif @str.skip(/(pre|post)_func\s+do/)
      where = @str[1]
      str = @str.scan_until(/\bend/)#[0,-4]
      unless str
        syntax_error "Invalid #{where}_func definition"
      end
      str = str[0..-4].strip
      except = only = nil
      @str.skip(/\s*/)
      if @str.skip(/,\s*:(only|except)\s*=\>\s*(\[[^\]]+\])/)
        if @str[1] == 'only'
          only = eval(@str[2]).map{|i|i.to_s}
        else
          except = eval(@str[2]).map{|i|i.to_s}
        end
      end
      if where == 'pre'
        @class.pre_func = str
        @class.pre_only = only if only
        @class.pre_except = except if except
      else
        @class.post_func = str
        @class.post_only = only if only
        @class.post_except = except if except
      end
    elsif @str.skip(/pre_func\s+(.*)/) # Pre func code
      @class.pre_func= @str[1] if @class.respond_to?(:pre_func)
    elsif @str.skip(/post_func\s+(.*)/) # Post func code
      @class.post_func= @str[1] if @class.respond_to?(:post_func)
    elsif @str.skip(/def(?=\s+)/x) # Function defn
      @str.skip(/\s+/)
      if @str.scan(/([a-zA-Z_* 0-9]+):/)
        returntype = @str[1]
      elsif @str.skip(/(GS?List)[{]([^}]+)[}]:/)
        container = @str[1]
        ct = @str[2]
        cn = ct.gsub(/\s+/,'').gsub(/[*]/,'__p')
        rule = container+'{'+ct+'}'
        returntype = rule

        #syntax_error "Auto converting (#{rule}) GSList of #{ct} is not yet supported"
        #  sane
        unless $custom_maps[rule] && $custom_maps[rule]['VALUE']
          function = "rubber_#{container}_of_#{cn}_to_array"
          @raw = @raw.to_s + <<-EOADD
inline VALUE #{function}(#{container} *list) {
          #{container} *p; volatile VALUE ary;
  ary = rb_ary_new();
  for(p = list ; p ; p = p->next) {
rb_ary_push(ary, #{Rubber.explicit_cast('(('+ct+') p->data )', ct, 'VALUE')});
  }
  return ary;
}
          EOADD
          $custom_maps[rule] ||={}
          $custom_maps[rule]['VALUE'] = function+"(%%)"
        end
      else
        returntype = 'VALUE'
      end
      prename = ''
      prename = @str.scan(/self\./)
      name = @str.scan(/[a-z_0-9A-Z.]+[?!=]?/)
      unless name
        name = @str.scan(/[-\[\]<>~=+|&]{1,3}/)
      end
      oname = name
      name = prename.to_s + oname
      #p [prename, oname, name]
      @str.skip(/\s*/)
      args = scan_args().collect { |i| C_Param.new(i) }
      func = @functions[name] = C_Function.new(name, args, '')
      func.returntype = returntype
      func.parent = @class
      stack.last.functions.push(func)
      puts "def "+ func.fullname
      stack.push(func)
      func.source_line = current_line
      func.source_file = current_file
      state.in_func = true

    elsif state.in_func == false and @str.skip(/(string|integer|float|double|int)(?= )/x) # C String as module wrapper
      type= @str[1]
      @str.skip_ws
      name = @str.scan_constant
      @str.skip(/\s*=\s*/)
      if @str.skip(/"/) #"
        string = '"' + @str.scan_until(/[^\\]?"/)  #"
      elsif t = @str.scan_constant
        string = @str[1]
      elsif type =~ /^(flo|dou|int)/ and t = @str.scan_number #@str.scan(/(0x)?([0-9]+(\.[0-9]+)?(e[0-9]+)?)/)
        string = @str[1]
      end
      klass = nil
      case type
      when /^str/
        klass = C_String
      when /^int/
        klass = C_Integer
      when /^(flo|dou)/
        klass = C_Float
      end
      stack.last.classes.push(klass.new(name, string, stack.last)) if klass
    elsif state.in_func == false && @str.skip(/(array)(?= )/x)
      type = @str[1]
      @str.skip_ws
      name = @str.scan_constant
      @str.skip_ws
      @str.skip(/=/)
      @str.skip_ws
      values = []
      if @str.skip(/\[/)
        @str.skip_ws
        until @str.skip(/\]/)
          if @str.scan_lit_string
            values << { :string => @str[1] } # unescape escaped chars?
          elsif @str.scan_lit_float
            values << { :float => @str[1] }
          elsif @str.scan_lit_integer
            values << { :int => @str[1] }
          elsif @str.skip_nil
            values << { :nil => true }
          elsif @str.scan_lit_bool
            values << { :bool => @str[1].upcase.eql?('TRUE') }
          elsif @str.scan_literal
            values << { :int => @str[1] } # Assume a constant
          else
            syntax_error "Unrecognised array value"
          end
          @str.skip_ws
          @str.skip(/,/)
          @str.skip_ws
        end
        stack.last.classes.push(C_Array.new(name, values, stack.last))
        p [ :create_array, values ]
      else
        syntax_error "Arrays should be in the form: [value1, value2, ... valueN]"
      end
    elsif txt = @str.get_byte # Spare chars
      if state.in_func
        func.text += txt
      else
        syntax_error "Invalid character #{txt}"
      end
    end
  end
end

#current_line ⇒ Object 



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# File 'lib/rubber/scanner.rb', line 533

def current_line
  count = 0
  @string[0..@str.pos].each_byte { |b| count += 1 if b == 10 }
  count
end

#misc_error(message, show_location = true) ⇒ Object 



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# File 'lib/rubber/scanner.rb', line 547

def misc_error(message, show_location=true)
  STDERR.puts "Error: #{message} at line #{current_line}\n"
  if show_location
    if @str.rest.size > 255
      STDERR.puts @str.rest[0..255]+"..."
    else
      STDERR.puts @str.rest
    end
  end
  exit 1
end

#scan(fp) ⇒ Object 



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# File 'lib/rubber/scanner.rb', line 116

def scan(fp)
  _scan(fp)
rescue Exception
  off,ind = 0,0
  for line in @lines
    off += line.size
    break if off > @str.pos
    ind += 1
  end
  #p @state, @str, ind
  raise
end

#scan_args ⇒ Object 



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# File 'lib/rubber/scanner.rb', line 88

def scan_args()
  args = []
  return args unless @str.peep(1) == '('
  brackets = 1
  arg = ''
  @str.get_byte # Get first bracket
  until @str.peep(1) == ')' and brackets == 1
    brackets += 1 if @str.peep(1) == '('
    brackets -= 1 if @str.peep(1) == ')'
    if brackets == 1 and @str.peep(1) == ','
      @str.pos = @str.pos + 1
      arg.strip!
      args.push arg unless arg.empty?
      arg = ''
    else
      arg += @str.get_byte
    end
  end
  @str.get_byte # Get last bracket
  arg.strip!
  args.push arg unless arg.empty?
  args
end

#syntax_error(message) ⇒ Object 



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# File 'lib/rubber/scanner.rb', line 538

def syntax_error(message)
  STDERR.puts "Syntax Error: #{message} at line #{current_line}\n"
  if @str.rest.size > 255
    STDERR.puts @str.rest[0..255]+"..."
  else
    STDERR.puts @str.rest
  end
  exit 1
end