Contents

# encoding: UTF-8
#
# Copyright (c) 2015 Michel Martens
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
class Seg
  SLASH = "/".freeze

  def initialize(path)
    @path = path
    @size = path.size
    @pos = 1
  end

  def head
    @path[@pos]
  end

  def curr
    @path[@pos - 1, @size]
  end

  def prev
    @path[0, @pos - 1]
  end

  def find(index)
    @path[@pos + index]
  end

  def subs(length)
    @path[@pos, length]
  end

  def move(offset)
    @pos += offset.succ
  end

  def root?
    @pos >= @size
  end

  def consume(str)
    return false if root?

    len = str.size

    case find(len)
    when nil, SLASH
      if subs(len) == str
        move(len)
        return true
      else
        return false
      end
    else
      return false
    end
  end

  def capture(sym, store)
    return false if root?

    len = (@path.index(SLASH, @pos) || @size) - @pos

    store[sym] = @path[@pos, len]
    move(len)

    return true
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
seg-0.0.1	lib/seg.rb