+
+\ wareki.fs - Display WAREKI and Anno Domini corresponding years
+\ +JMJ 2020 David Meyer
+\ 2020/3/31 Add Reiwa era
+
+\ help-wareki - Display module help
+: help-wareki ( -- )
+ cr ." WAREKI" cr
+ ." Display Japanese era years corresponding to A.D. years and" cr
+ ." vice versa." cr
+ ." HEISEI ( u -- ) Display A.D. year corresponding to Heisei era year." cr
+ ." MEIJI ( u -- ) Display A.D. year corresponding to Meiji era year." cr
+ ." NENGO ( u -- ) Display Japanese year in Meiji, Taishou, Shouwa," cr
+ ." Heisei, or Reiwa eras corresponding to A.D. year." cr
+ ." REIWA ( u -- ) Display A.D. year corresponding to Reiwa era year." cr
+ ." SHOWA ( u -- ) Display A.D. year corresponding to Shouwa era year." cr
+ ." TAISHO ( u -- ) Display A.D. year corresponding to Taishou era year." cr
+;
+
+\ nengo - Display NENGO for A.D. (Meiji, Taishou, Shouwa,
+\ Heisei, Reiwa eras only)
+: nengo ( u -- )
+ dup 1868 < if
+ ." ERROR: Year precedes MEIJI era " drop
+ else
+ dup 1868 = if
+ ." MEIJI GANNEN (Sep 8 -) " drop
+ else
+ dup 1912 < if
+ ." MEIJI " 1867 - .
+ else
+ dup 1912 = if
+ ." MEIJI 45/TAISHO GANNEN (Jul 30-) " drop
+ else
+ dup 1926 < if
+ ." TAISHO " 1911 - .
+ else
+ dup 1926 = if
+ ." TAISHO 15/SHOWA GANNEN (Dec 25-) " drop
+ else
+ dup 1989 < if
+ ." SHOWA " 1925 - .
+ else
+ dup 1989 = if
+ ." SHOWA 64/HEISEI GANNEN (Jan 8-) " drop
+ else
+ dup 2019 < if
+ ." HEISEI " 1988 - .
+ else
+ dup 2019 = if
+ ." HEISEI 31/REIWA GANNEN (May 1-) " drop
+ else
+ ." REIWA " 2018 - .
+ then
+ then
+ then
+ then
+ then
+ then
+ then
+ then
+ then
+ then
+;
+
+\ meiji - Display A.D. for Meiji era NENGO.
+: meiji ( u -- )
+ dup 0= if
+ ." ERROR: NENGO < 1 " drop
+ else
+ dup 45 > if
+ ." ERROR: NENGO > 45 " drop
+ else
+ ." AD " 1867 + .
+ then
+ then
+;
+
+\ taisho - Display A.D. for Taishou era NENGO.
+: taisho ( u -- )
+ dup 0= if
+ ." ERROR: NENGO < 1 " drop
+ else
+ dup 15 > if
+ ." ERROR: NENGO > 15 " drop
+ else
+ ." AD " 1911 + .
+ then
+ then
+;
+
+\ showa - Display A.D. for Shouwa era NENGO.
+: showa ( u -- )
+ dup 0= if
+ ." ERROR: NENGO < 1 " drop
+ else
+ dup 64 > if
+ ." ERROR: NENGO > 64 " drop
+ else
+ ." AD " 1925 + .
+ then
+ then
+;
+
+\ heisei - Display A.D. for Heisei era NENGO.
+: heisei ( u -- )
+ dup 0= if
+ ." ERROR: NENGO < 1 " drop
+ else
+ ." AD " 1988 + .
+ then
+;
+
+\ reiwa - Display A.D. for Reiwa era NENGO.
+: reiwa ( u -- )
+ dup 0= if
+ ." ERROR: NENGO < 1 " drop
+ else
+ ." AD " 2018 + .
+ then
+;
+
+cr ." Type 'help-wareki' for help"
+ |
+
+
+\ wareki.fs - Display WAREKI and Anno Domini corresponding years
+\ +JMJ 2022 David Meyer
+\ 2020/3/31 Add Reiwa era
+\ 2022/2/9 Refactor and convert to data-driven
+
+\ help-wareki - Display module help
+: help-wareki ( -- )
+ cr ." WAREKI" cr
+ ." Display Japanese era years corresponding to A.D. years and" cr
+ ." vice versa." cr
+ ." HEISEI ( u -- ) Display A.D. year corresponding to Heisei era year." cr
+ ." MEIJI ( u -- ) Display A.D. year corresponding to Meiji era year." cr
+ ." NENGO ( u -- ) Display Japanese year in Meiji, Taishou, Shouwa," cr
+ ." Heisei, or Reiwa eras corresponding to A.D. year." cr
+ ." REIWA ( u -- ) Display A.D. year corresponding to Reiwa era year." cr
+ ." SHOWA ( u -- ) Display A.D. year corresponding to Shouwa era year." cr
+ ." TAISHO ( u -- ) Display A.D. year corresponding to Taishou era year." cr
+;
+
+0 constant ERAM \ MEIJI era index
+1 constant ERAT \ TAISHO era index
+2 constant ERAS \ SHOWA era index
+3 constant ERAH \ HEISEI era index
+4 constant ERAR \ REIWA era index
+
+create ERALFGY \ Era last full Gregorian year (M/T/S/H/R)
+1867 , 1911 , 1925 , 1988 , 2018 ,
+create ERALYR \ Era last year (M/T/S/H)
+45 , 15 , 64 , 31 ,
+
+create ERANAME \ Era name length/string (M/T/S/H/R)
+5 , 77 c, 69 c, 73 c, 74 c, 73 c, 0 c, \ "MEIJI"
+6 , 84 c, 65 c, 73 c, 83 c, 72 c, 79 c, \ "TAISHO"
+5 , 83 c, 72 c, 79 c, 87 c, 65 c, 0 c, \ "SHOWA"
+6 , 72 c, 69 c, 73 c, 83 c, 69 c, 73 c, \ "HEISEI"
+5 , 82 c, 69 c, 73 c, 87 c, 65 c, 0 c, \ "REIWA"
+
+create ERADATE \ Era start date length/string (M/T/S/H/R)
+5 , 83 c, 101 c, 112 c, 32 c, 56 c, 0 c, \ "Sep 8"
+6 , 74 c, 117 c, 108 c, 32 c, 51 c, 48 c, \ "Jul 30"
+6 , 68 c, 101 c, 99 c, 32 c, 50 c, 53 c, \ "Dec 25"
+5 , 74 c, 97 c, 110 c, 32 c, 56 c, 0 c, \ "Jan 8"
+5 , 77 c, 97 c, 121 c, 32 c, 49 c, 0 c, \ "May 1"
+
+: []@ ( uidx a-base -- a-addr ) swap cells + @ ;
+
+: []$ ( uidx a-base -- c-addr ulen )
+ swap 1 cells 6 chars + * + dup 1 cells + swap @
+;
+
+: ng>gy ( ungy uera -- ugy ) ERALFGY []@ + ;
+
+: gy>ng ( ugy -- ungy uera )
+ ERAR begin
+ dup ERALFGY []@ rot dup rot <= while swap 1-
+ repeat
+ over ERALFGY []@ - swap
+;
+
+: prera ( uera -- ) ERANAME []$ type space ;
+
+: preradt ( uera -- ) ERADATE []$ type ;
+
+: prgy ( ug -- ) ." AD " . ;
+
+: ngyok? ( uera ungy -- f )
+ dup 0< if
+ 2drop false else
+ swap ERALYR []@ 1+ > if false else true then
+ then
+;
+
+: nengo ( ugy -- )
+ dup ERAM ERALFGY []@ <= if
+ drop ." Year prior to MEIJI era unsupported " else
+ gy>ng over 1 = if
+ dup 1- dup prera ERALYR []@ . ." / "
+ dup prera ." GANNEN (" preradt ." -) " drop else
+ prera . then
+ then
+;
+
+: cvtng ( ungy uera -- )
+ 2dup swap ngyok? if
+ ng>gy prgy else
+ 2drop ." Invalid NENGO year " then
+;
+
+: meiji ( ungy -- ) ERAM cvtng ;
+: taisho ( ungy -- ) ERAT cvtng ;
+: showa ( ungy -- ) ERAS cvtng ;
+: heisei ( ungy -- ) ERAH cvtng ;
+: reiwa ( ungy -- ) ERAR cvtng ;
+
+cr ." Type 'help-wareki' for help"
+ |
+
+
+