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         # --nullables
  25         var opt_nullables = new OptionBool("Compute metrics on nullables send", "--nullables")
  26         # --static-types
  27         var opt_static_types = new OptionBool("Compute explicit static types metrics", "--static-types")
  28         # --tables
  29         var opt_tables = new OptionBool("Compute tables metrics", "--tables")
  30         # --rta
  31         var opt_rta = new OptionBool("Compute RTA metrics", "--rta")
  32         # --generate_hyperdoc
  33         var opt_generate_hyperdoc = new OptionBool("Generate Hyperdoc", "--generate_hyperdoc")
  34
  35         var opt_dir = new OptionString("Directory where some statistics files are generated", "-d", "--dir")
  36         var output_dir: String = "."
  37
  38         redef init
  39         do
  40                 super
  41                 self.option_context.add_option(opt_nullables)
  42                 self.option_context.add_option(opt_static_types)
  43                 self.option_context.add_option(opt_tables)
  44                 self.option_context.add_option(opt_rta)
  45                 self.option_context.add_option(opt_generate_hyperdoc)
  46                 self.option_context.add_option(opt_dir)
  47         end
  48
  49         redef fun process_options
  50         do
  51                 super
  52                 var val = self.opt_dir.value
  53                 if val != null then
  54                         val = val.simplify_path
  55                         val.mkdir
  56                         self.output_dir = val
  57                 end
  58         end
  59 end
  60
  61 # A counter counts occurence of things
  62 # Use this instead of a HashMap[E, Int]
  63 class Counter[E: Object]
  64         # Total number of counted occurences
  65         var total: Int = 0
  66
  67         private var map = new HashMap[E, Int]
  68
  69         # The number of counted occurences of `e'
  70         fun [](e: E): Int
  71         do
  72                 var map = self.map
  73                 if map.has_key(e) then return map[e]
  74                 return 0
  75         end
  76
  77         # Count one more occurence of `e'
  78         fun inc(e: E)
  79         do
  80                 self.map[e] = self[e] + 1
  81                 total += 1
  82         end
  83
  84         # Return an array of elements sorted by occurences
  85         fun sort: Array[E]
  86         do
  87                 var res = map.keys.to_a
  88                 var sorter = new CounterSorter[E](self)
  89                 sorter.sort(res)
  90                 #res.sort !cmp a, b = map[a] <=> map[b]
  91                 return res
  92         end
  93 end
  94
  95 private class CounterSorter[E: Object]
  96         super AbstractSorter[E]
  97         var counter: Counter[E]
  98         redef fun compare(a,b) do return self.counter.map[a] <=> self.counter.map[b]
  99 end
 100
 101 # Helper function to display n/d and handle division by 0
 102 fun div(n: Int, d: Int): String
 103 do
 104         if d == 0 then return "na"
 105         return ((100*n/d).to_f/100.0).to_precision(2)
 106 end