Question

RPG Free Format: Convert Date

Asked by: Philip_Lang

In Free Format any ideas on how to Convert a Date text string to CCYYMMDD Decimal

Eg 'March 2006' -> 20060301
Lenght of date varies depending on Month Value
Eg 'August 2007' -> 20070801

Thanks in advance.

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Asked On: 2006-02-10 at 03:11:00ID21731480
Tags: date
,; convert
,; rpg
,; format
Topic: Programming for iSeries / AS400
Participating Experts: 3
Points: 125
Comments: 4

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Answers

by: daveslaterPosted on 2006-02-10 at 06:34:13ID: 15922811

Hi
you can use the CEE date formatting programs. Thaese accept charater format date and return a lilian date -

H BNDDIR('QC2LE')
D ErrorDS ds 16 Qualified
D BytesProv 10i 0 inz(%size(ErrorDS))
D BytesAvail 10i 0
D ExceptionID 7
** Convert date to lillian date
D Ceedays Pr Opdesc
D Date 23A Const
D Dateformat 23A Const
D Lilian 10I 0
D Error Like(Errords)
D

C Callp Ceedays(%Trim(Lcldate)
C :%Trim(Lclfmt)
C :Lcllil
C :Errords)

and

** Convert lilian to Character
D Ceedate Pr Opdesc
D Lilian 10I 0 Const
D Dateformat 23A Const
D Date 23A
D Error Like(Errords)

C Callp Ceedate(Date
C :Dateformat
C :Chardate
C :Errords)

Dave

by: joeschuhPosted on 2006-02-10 at 13:47:30ID: 15927021

This is not what you are looking for but this is a usefull bit of information for anyone looking for standard date conversions
---------------
// character to character...
@charB = %char(%date(@charA:*ymd/):*usa/); // 'yy/mm/dd' to 'mm/dd/ccyy'
@charC = %char(%date(@charA:*ymd/):*mdy/); // 'yy/mm/dd' to 'mm/dd/yy'
@charA = %char(%date(@charB:*usa/):*ymd/); // 'mm/dd/ccyy' to 'yy/mm/dd'
@charC = %char(%date(@charB:*usa/):*mdy/); // 'mm/dd/ccyy' to 'mm/dd/yy'
@charA = %char(%date(@charC:*mdy/):*ymd/); // 'mm/dd/yy' to 'yy/mm/dd'
@charB = %char(%date(@charC:*mdy/):*usa/); // 'mm/dd/yy' to 'mm/dd/ccyy'

// character to date...
@dateA = %date(@charA:*ymd/); // 'yy/mm/dd' to D'ccyy-mm-dd'
@dateA = %date(@charB:*usa/); // 'mm/dd/ccyy' to D'ccyy-mm-dd'
@dateA = %date(@charC:*mdy/); // 'mm/dd/yy' to D'ccyy-mm-dd'

// character to numeric...
@numA = %dec(%char(%date(@charA:*ymd/):*ymd0):6:0); // 'yy/mm/dd' to yymmdd
@numB = %dec(%char(%date(@charA:*ymd/):*cymd0):7:0); // 'yy/mm/dd' to cyymmdd
@numC = %dec(%char(%date(@charA:*ymd/):*iso0):7:0); // 'yy/mm/dd' to ccyymmdd
@numD = %dec(%char(%date(@charA:*ymd/):*mdy0):7:0); // 'yy/mm/dd' to mmddyy
@numE = %dec(%char(%date(@charA:*ymd/):*usa0):7:0); // 'yy/mm/dd' to mmddyyyy
@numA = %dec(%char(%date(@charB:*usa/):*ymd0):6:0); // 'mm/dd/ccyy' to yymmdd
@numB = %dec(%char(%date(@charB:*usa/):*cymd0):7:0); // 'mm/dd/ccyy' to cyymmdd
@numC = %dec(%char(%date(@charB:*usa/):*iso0):7:0); // 'mm/dd/ccyy' to ccyymmdd
@numD = %dec(%char(%date(@charB:*usa/):*mdy0):7:0); // 'mm/dd/ccyy' to mmddyy
@numE = %dec(%char(%date(@charB:*usa/):*usa0):7:0); // 'mm/dd/ccyy' to mmddyyyy
@numA = %dec(%char(%date(@charC:*mdy/):*ymd0):6:0); // 'mm/dd/yy' to yymmdd
@numB = %dec(%char(%date(@charC:*mdy/):*cymd0):7:0); // 'mm/dd/yy' to cyymmdd
@numC = %dec(%char(%date(@charC:*mdy/):*iso0):7:0); // 'mm/dd/yy' to ccyymmdd
@numD = %dec(%char(%date(@charC:*mdy/):*mdy0):7:0); // 'mm/dd/yy' to mmddyy
@numE = %dec(%char(%date(@charC:*mdy/):*usa0):7:0); // 'mm/dd/yy' to mmddyyyy

// date to character...
@charA = %char(@dateA:*ymd/); // D'ccyy-mm-dd' to 'yy/mm/dd'
@charB = %char(@dateA:*usa/); // D'ccyy-mm-dd' to 'mm/dd/ccyy'
@charC = %char(@dateA:*mdy/); // D'ccyy-mm-dd' to 'mm/dd/yy'

// date to numeric...
@numA = %dec(%char(@dateA:*ymd/):6:0); // D'ccyy-mm-dd' to yymmdd
@numB = %dec(%char(@dateA:*cymd/):7:0); // D'ccyy-mm-dd' to cyymmdd
@numC = %dec(%char(@dateA:*iso-):8:0); // D'ccyy-mm-dd' to ccyymmdd
@numD = %dec(%char(@dateA:*mdy/):6:0); // D'ccyy-mm-dd' to mmddyy
@numE = %dec(%char(@dateA:*usa/):8:0); // D'ccyy-mm-dd' to mmddccyy

// numeric to character...
@charA = %char(%date(@numA:*ymd):*ymd/); // yymmdd to 'yy/mm/dd'
@charB = %char(%date(@numA:*ymd):*usa/); // yymmdd to 'mm/dd/ccyy'

@charC = %char(%date(@numA:*ymd):*mdy/); // yymmdd to 'mm/dd/yy'
@charA = %char(%date(@numB:*cymd):*ymd/); // cyymmdd to 'yy/mm/dd'
@charB = %char(%date(@numB:*cymd):*usa/); // cyymmdd to 'mm/dd/ccyy'
@charC = %char(%date(@numB:*cymd):*mdy/); // cyymmdd to 'mm/dd/yy'
@charA = %char(%date(@numC:*iso):*ymd/); // D'ccyy-mm-dd' to 'yy/mm/dd'
@charB = %char(%date(@numC:*iso):*usa/); // D'ccyy-mm-dd' to 'mm/dd/ccyy'
@charC = %char(%date(@numC:*iso):*mdy/); // D'ccyy-mm-dd' to 'mm/dd/yy'
@charA = %char(%date(@numD:*mdy):*ymd/); // mmddyy to 'yy/mm/dd'
@charB = %char(%date(@numD:*mdy):*usa/); // mmddyy to 'mm/dd/ccyy'
@charC = %char(%date(@numD:*mdy):*mdy/); // mmddyy to 'mm/dd/yy'
@charA = %char(%date(@numE:*usa):*ymd/); // mmddccyy to 'yy/mm/dd'
@charB = %char(%date(@numE:*usa):*usa/); // mmddccyy to 'mm/dd/ccyy'
@charC = %char(%date(@numE:*usa):*mdy/); // mmddccyy to 'mm/dd/yy'

// numeric to date...
@dateA = %date(@numA:*ymd); // yymmdd to D'ccyy-mm-dd'
@dateA = %date(@numB:*cymd); // cyymmdd to D'ccyy-mm-dd'
@dateA = %date(@numC:*iso); // ccyymmdd' to D'ccyy-mm-dd'
@dateA = %date(@numD:*mdy); // mmddyy to D'ccyy-mm-dd'
@dateA = %date(@numE:*usa); // mmddccyy to D'ccyy-mm-dd'

// numeric to numeric...
@numB = %dec(%char(%date(@numA:*ymd):*cymd0):7:0); // yymmdd to cyymmdd
@numC = %dec(%char(%date(@numA:*ymd):*iso0):8:0); // yymmdd to ccyymmdd

@numD = %dec(%char(%date(@numA:*ymd):*mdy0):6:0); // yymmdd to mmddyy
@numE = %dec(%char(%date(@numA:*ymd):*usa0):8:0); // yymmdd to mmddccyy
@numA = %dec(%char(%date(@numB:*cymd):*ymd0):6:0); // cyymmdd to yymmdd
@numC = %dec(%char(%date(@numB:*cymd):*iso0):8:0); // cyymmdd to ccyymmdd
@numD = %dec(%char(%date(@numB:*cymd):*mdy0):6:0); // cyymmdd to mmddyy
@numE = %dec(%char(%date(@numB:*cymd):*usa0):8:0); // cyymmdd to mmddccyy
@numA = %dec(%char(%date(@numC:*iso):*ymd0):6:0); // ccyymmdd to yymmdd
@numB = %dec(%char(%date(@numC:*iso):*cymd0):7:0); // ccyymmdd to cyymmdd
@numD = %dec(%char(%date(@numC:*iso):*mdy0):6:0); // ccyymmdd to mmddyy
@numE = %dec(%char(%date(@numC:*iso):*usa0):8:0); // ccyymmdd to mmddccyy
@numA = %dec(%char(%date(@numD:*mdy):*ymd0):6:0); // mmddyy to yymmdd
@numB = %dec(%char(%date(@numD:*mdy):*cymd0):7:0); // mmddyy to cyymmdd
@numC = %dec(%char(%date(@numD:*mdy):*iso0):8:0); // mmddyy to ccyymmdd
@numE = %dec(%char(%date(@numD:*mdy):*usa0):8:0); // mmddyy to mmddccyy
@numA = %dec(%char(%date(@numE:*usa):*ymd0):6:0); // mmddccyy to yymmdd
@numB = %dec(%char(%date(@numE:*usa):*cymd0):7:0); // mmddccyy to cyymmdd
@numC = %dec(%char(%date(@numE:*usa):*iso0):8:0); // mmddccyy to ccyymmdd
@numD = %dec(%char(%date(@numE:*usa):*mdy0):6:0); // mmddccyy to mmddyy

*inlr = *on;
/end-free

by: tliottaPosted on 2006-02-10 at 20:35:53ID: 15929148

Expanding on Dave's examples, this is about as close as you can get using ILE CL:

* Begin paste --
pgm ( +
&MonthDate +
)

dcl &MonthDate *char 17

dcl &RtnVal1 *char 4
dcl &RtnVal2 *char 8

dcl &PicStr1 *char 17 value( 'Mmmmmmmmz ZD YYYY' )
dcl &PicStr2 *char 8 value( 'YYYYMMDD' )

callprc CEEDAYS ( +
&MonthDate +
&PicStr1 +
&RtnVal1 +
*omit +
)

callprc CEEDATE ( +
&RtnVal1 +
&PicStr2 +
&RtnVal2 +
*omit +
)

dmpclpgm

return

endpgm
* End paste --

Note a couple problems...

The first picture string is 'Mmmmmmmmz ZD YYYY'. There's a direct implication that a 'day' value comes between where the month name and the 4-digit year are in the string. That's because a string such as 'August 2005' simply isn't a valid date for APIs. The API can't tell if you mean the 1st, the 2nd or any day of the month.

If you want to use date/time APIs, you'll have to insert at least a character '1' between the name of the month and the 4-digit year plus making sure there's a space after the month and before the year.

However, there is a minor twist...

Let's say that the picture string is 'ZD Mmmmmmmmmz YYYY' instead, so that the 'day' comes first and is allowed to have the leading zero suppressed. In that case, you could take the input string and :

chgvar &MonthDate ( '1' *bcat &MonthDate )

...before calling the first CEEDAYS API. That would stick a '1' followed by a space followed by the original string. And it works.

I supplied the example in CL only because it can help to have a simple example to test while learning the behavior of APIs. For the CEE* date/time APIs, there are a lot of little twists like this.

Tom

by: tliottaPosted on 2006-02-15 at 14:11:47ID: 15965612

Nothing useful to add, just wanted to comment that IMO Dave deserves some credit for his RPG example where I was mostly rounding out the discussion. So, at least if anyone reads this thread in the future, they'll know my thoughts.

Tom

20120131-EE-VQP-002

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RPG Free Format: Convert Date

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date

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Programming for iSeries / AS400

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