summary refs log tree commit diff stats
path: root/lib/pure/romans.nim
diff options
context:
space:
mode:
Diffstat (limited to 'lib/pure/romans.nim')
-rw-r--r--lib/pure/romans.nim59
1 files changed, 0 insertions, 59 deletions
diff --git a/lib/pure/romans.nim b/lib/pure/romans.nim
deleted file mode 100644
index aa047d1cc..000000000
--- a/lib/pure/romans.nim
+++ /dev/null
@@ -1,59 +0,0 @@
-#
-#
-#            Nim's Runtime Library
-#        (c) Copyright 2011 Philippe Lhoste
-#
-#    See the file "copying.txt", included in this
-#    distribution, for details about the copyright.
-#
-
-## Module for converting an integer to a Roman numeral.
-## See http://en.wikipedia.org/wiki/Roman_numerals for reference.
-##
-## **Warning:** This module will be moved out of the stdlib and into a
-## Nimble package, don't use it.
-
-const
-  RomanNumeralDigits* = {'I', 'i', 'V', 'v', 'X', 'x', 'L', 'l', 'C', 'c',
-    'D', 'd', 'M', 'm'} ## set of all characters a Roman numeral may consist of
-
-proc romanToDecimal*(romanVal: string): int =
-  ## Converts a Roman numeral to its int representation.
-  result = 0
-  var prevVal = 0
-  for i in countdown(romanVal.len - 1, 0):
-    var val = 0
-    case romanVal[i]
-    of 'I', 'i': val = 1
-    of 'V', 'v': val = 5
-    of 'X', 'x': val = 10
-    of 'L', 'l': val = 50
-    of 'C', 'c': val = 100
-    of 'D', 'd': val = 500
-    of 'M', 'm': val = 1000
-    else:
-      raise newException(EInvalidValue, "invalid roman numeral: " & $romanVal)
-    if val >= prevVal:
-      inc(result, val)
-    else:
-      dec(result, val)
-    prevVal = val
-
-proc decimalToRoman*(number: range[1..3_999]): string =
-  ## Converts a number to a Roman numeral.
-  const romanComposites = [
-    ("M", 1000), ("CM", 900),
-    ("D", 500), ("CD", 400), ("C", 100),
-    ("XC", 90), ("L", 50), ("XL", 40), ("X", 10), ("IX", 9),
-    ("V", 5), ("IV", 4), ("I", 1)]
-  result = ""
-  var decVal: int = number
-  for key, val in items(romanComposites):
-    while decVal >= val:
-      dec(decVal, val)
-      result.add(key)
-
-when isMainModule:
-  for i in 1 .. 3_999:
-    assert i == i.decimalToRoman.romanToDecimal
-