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parsdate.vrm
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1994-08-30
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/***********************************************/
/* VX-Rexx Macro to parse dates */
/* Please do not modify */
/***********************************************/
/* Custom mainline for macro */
call RXFuncAdd "VRLoadFuncs", "VROBJ", "VRLoadFuncs"
call VRLoadFuncs
_VREVersion = SubWord( VRVersion( "VRObj" ), 1, 1 )
if( _VREVersion < 2.02 )then do
call VRMessage "", "This program requires VX-REXX version 2.0b to run.", "Error!"
return 32000
end
signal on SYNTAX name _VRESyntax
signal _VREMain
_VRESyntax:
parse source . . _VRESourceSpec
call VRMessage "", "Syntax error in" _VRESourceSpec "line" SIGL, "Error!"
exit 32000
_VREMain:
/*:VRX Main
*/
Main:
parse upper arg date direction form
if Length( date ) < 8 then
signal dateError
position = Pos( "/", date, 1 )
if position = 0 then
signal dateError
if Pos( '/', date, position + 1 ) = 0 then
signal dateError
if form = 'O' then
parse var date year '/' month '/' day
if form = 'E' then
parse var date day '/' month '/' year
if form = 'U' then
parse var date month '/' day '/' year
/*
* Increment date by one
*/
if direction = 'UP' then do
call GetMaxDay
if day < Maxday then do
day = day + 1
signal SetDate
end
if day = Maxday then do
if month <> '12' then do
month = month + 1
day = '01'
signal SetDate
end
if month = '12' then do
year = year + 1
month = '01'
day = '01'
signal SetDate
end
end
signal SetDate
end
/*
* Decrement date by one
*/
if direction = 'DOWN' then do
if day > 1 then do
day = day - 1
signal SetDate
end
if day = 1 then do
if month <> 1 then do
month = month - 1
call GetMaxDay
day = MaxDay
signal SetDate
end
if month = 1 then do
year = year - 1
month = '12'
day = '31'
signal SetDate
end
end
signal SetDate
end
GetMaxDay:
/*
* Figure maximum number of days for given month
*/
maxday = 31
if( month = 4 | month = 6 | month = 9 | month = 11 )then do
maxday = 30
return
end
if( Pos( '.', year / 4 ) = 0 & month = 2 )then do
maxday = 29
return
end
if( Pos( '.', year / 4 ) <> 0 & month = 2 )then do
maxday = 28
return
end
return
SetDate:
/*
* Return formatted date
*/
if Length( year ) = 1 then
year = '0'||year
if Length( month ) = 1 then
month = '0'||month
if Length( day ) = 1 then
day = '0'||day
if form = 'O' then
rc = year||'/'||month||'/'||day
if form = 'E' then
rc = day||'/'||month||'/'||year
if form = 'U' then
rc = month||'/'||day||'/'||year
call VRMethod 'Application', 'PutVar', 'rc'
exit
dateError:
if form = 'O' then
call VRMessage "", "Incorrect date format -- yy/mm/dd ", "Warning"
if form = 'U' then
call VRMessage "", "Incorrect date format -- mm/dd/yy ", "Warning"
if form = 'E' then
call VRMessage "", "Incorrect date format -- dd/mm/yy ", "Warning"
rc = 'ERROR'
call VRMethod 'Application', 'PutVar', 'rc'
exit