src/metrics/metrics_base.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2012 Jean Privat <jean@pryen.org>
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 # Helpers for various statistics tools.
  18 module metrics_base
  19
  20 import modelbuilder
  21
  22 redef class ToolContext
  23
  24         # --static-types
  25         var opt_static_types = new OptionBool("Compute explicit static types metrics", "--static-types")
  26         # --tables
  27         var opt_tables = new OptionBool("Compute tables metrics", "--tables")
  28         # --rta
  29         var opt_rta = new OptionBool("Compute RTA metrics", "--rta")
  30         # --generate_hyperdoc
  31         var opt_generate_hyperdoc = new OptionBool("Generate Hyperdoc", "--generate_hyperdoc")
  32
  33         var opt_dir = new OptionString("Directory where some statistics files are generated", "-d", "--dir")
  34         var output_dir: String = "."
  35
  36         redef init
  37         do
  38                 super
  39                 self.option_context.add_option(opt_static_types)
  40                 self.option_context.add_option(opt_tables)
  41                 self.option_context.add_option(opt_rta)
  42                 self.option_context.add_option(opt_generate_hyperdoc)
  43                 self.option_context.add_option(opt_dir)
  44         end
  45
  46         redef fun process_options
  47         do
  48                 super
  49                 var val = self.opt_dir.value
  50                 if val != null then
  51                         val = val.simplify_path
  52                         val.mkdir
  53                         self.output_dir = val
  54                 end
  55         end
  56 end
  57
  58 # A counter counts occurence of things
  59 # Use this instead of a HashMap[E, Int]
  60 class Counter[E: Object]
  61         # Total number of counted occurences
  62         var total: Int = 0
  63
  64         private var map = new HashMap[E, Int]
  65
  66         # The number of counted occurences of `e'
  67         fun [](e: E): Int
  68         do
  69                 var map = self.map
  70                 if map.has_key(e) then return map[e]
  71                 return 0
  72         end
  73
  74         # Count one more occurence of `e'
  75         fun inc(e: E)
  76         do
  77                 self.map[e] = self[e] + 1
  78                 total += 1
  79         end
  80
  81         # Return an array of elements sorted by occurences
  82         fun sort: Array[E]
  83         do
  84                 var res = map.keys.to_a
  85                 var sorter = new CounterSorter[E](self)
  86                 sorter.sort(res)
  87                 #res.sort !cmp a, b = map[a] <=> map[b]
  88                 return res
  89         end
  90 end
  91
  92 private class CounterSorter[E: Object]
  93         super AbstractSorter[E]
  94         var counter: Counter[E]
  95         redef fun compare(a,b) do return self.counter.map[a] <=> self.counter.map[b]
  96 end
  97
  98 # Helper function to display n/d and handle division by 0
  99 fun div(n: Int, d: Int): String
 100 do
 101         if d == 0 then return "na"
 102         return ((100*n/d).to_f/100.0).to_precision(2)
 103 end