Created
August 5, 2013 04:46
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Ruby script to calc the number of days.
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require 'date' | |
# 使用方法 | |
USAGE = <<"EOS" | |
USAGE : ruby calc_num_of_days.rb DATE_FROM DATE_TO | |
- The formart of DATE_FROM and DATE_TO is "YYYYMMDD". | |
EOS | |
# [CLASS] 引数 | |
class Arg | |
def initialize | |
@date_f = "" | |
@date_t = "" | |
end | |
def check | |
begin | |
# 引数の数が2個以外はエラー | |
if ARGV.length == 2 | |
# 日付桁数チェック | |
return false unless ARGV[0].to_s =~ /^\d{8}$/ | |
return false unless ARGV[1].to_s =~ /^\d{8}$/ | |
# 日付妥当性チェック ( FROM ) | |
y_f = ARGV[0].to_s[0,4].to_i | |
m_f = ARGV[0].to_s[4,2].to_i | |
d_f = ARGV[0].to_s[6,2].to_i | |
if Date.valid_date?(y_f, m_f, d_f) | |
@date_f = ARGV[0].to_s | |
else | |
return false | |
end | |
# 日付妥当性チェック ( TO ) | |
y_t = ARGV[1].to_s[0,4].to_i | |
m_t = ARGV[1].to_s[4,2].to_i | |
d_t = ARGV[1].to_s[6,2].to_i | |
if Date.valid_date?(y_t, m_t, d_t) | |
@date_t = ARGV[1].to_s | |
else | |
return false | |
end | |
else | |
return false | |
end | |
return true | |
rescue => e | |
STDERR.puts "[EXCEPTION][#{self.class.name}.check] #{e}" | |
exit 1 | |
end | |
end | |
def get_date(n) | |
return n == 1 ? @date_f : @date_t | |
end | |
end | |
# [CLASS] 計算 | |
class Calc | |
def initialize(date_f, date_t) | |
@date_f = date_f | |
@date_t = date_t | |
end | |
def calc | |
begin | |
# 日付 ( FROM ) | |
y = @date_f[0,4].to_i | |
m = @date_f[4,2].to_i | |
d = @date_f[6,2].to_i | |
jd_f = calc_jd(0, y, m, d) | |
jd2_f = calc_jd(1, y, m, d) | |
puts "[ #{y}年#{sprintf("%02d", m)}月#{sprintf("%02d", d)}日 ]" | |
puts "\t ユリウス日 : #{sprintf("%9.1f", jd_f)} 日" | |
puts "\t修正ユリウス日 : #{sprintf("%9.1f", jd2_f)} 日" | |
# 日付 ( TO ) | |
y = @date_t[0,4].to_i | |
m = @date_t[4,2].to_i | |
d = @date_t[6,2].to_i | |
jd_t = calc_jd(0, y, m, d) | |
jd2_t = calc_jd(1, y, m, d) | |
puts "[ #{y}年#{sprintf("%02d", m)}月#{sprintf("%02d", d)}日 ]" | |
puts "\t ユリウス日 : #{sprintf("%9.1f", jd_t)} 日" | |
puts "\t修正ユリウス日 : #{sprintf("%9.1f", jd2_t)} 日" | |
# 日数 | |
puts "[[ 経過日数 ]]\n\t#{jd_t - jd_f} 日" | |
rescue => e | |
STDERR.puts "[EXCEPTION][#{self.class.name}.calc] #{e}" | |
exit 1 | |
end | |
end | |
private | |
# ユリウス日計算 | |
# kbn : 0 ( ユリウス日 ) | |
# 1 ( 修正ユリウス日 ) | |
def calc_jd(kbn, y, m, d) | |
jd = (365.25 * y).truncate | |
jd += (y / 400).truncate | |
jd -= (y / 100).truncate | |
jd += (30.59 * (m - 2)).truncate | |
jd += d | |
if kbn == 0 | |
jd += 1721088.5 | |
else | |
jd -= 678912 | |
end | |
end | |
end | |
#### MAIN #### | |
if __FILE__ == $0 | |
# 引数チェック( エラーなら終了 ) | |
obj_arg = Arg.new | |
unless obj_arg.check | |
puts USAGE | |
exit 1 | |
end | |
# 日付取得 | |
date_f = obj_arg.get_date(1) | |
date_t = obj_arg.get_date(2) | |
# 日数計算 | |
obj_calc = Calc.new(date_f, date_t) | |
obj_calc.calc | |
end |
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