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From: dxf <dxforth@gmail.com>
Newsgroups: comp.lang.forth
Subject: Re: Parsing timestamps?
Date: Sun, 6 Oct 2024 23:58:55 +1100
Organization: i2pn2 (i2pn.org)
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On 6/10/2024 7:59 pm, mhx wrote:
> On Sun, 6 Oct 2024 7:51:31 +0000, dxf wrote:
> 
>> Is there an easier way of doing this?  End goal is a double number
>> representing centi-secs.
>>
>>
>> empty decimal
>>
>> : SPLIT ( a u c -- a2 u2 a3 u3 )  >r 2dup r> scan 2swap 2 pick - ;
>> : >INT ( adr len -- u )  0 0 2swap >number 2drop drop ;
>>
>> : /T ( a u -- $hour $min $sec )
>>   2 0 do  [char] : split  2swap  dup if 1 /string then  loop
>>   2 0 do  dup 0= if 2rot 2rot then  loop ;
>>
>> : .T  2swap 2rot  cr  >int . ." hr "  >int . ." min " >int . ." sec " ;
>>
>> s" 1:2:3"    /t .t
>> s" 02:03"    /t .t
>> s" 03"       /t .t
>> s" 23:59:59" /t .t
>> s" 0:00:03"  /t .t
> 
> Why don't you use the fact that >NUMBER returns the given
> string starting with the first unconverted character?
> SPLIT should be redundant.

Good idea!

: /T ( a u -- hour min sec )
  3 0 do
    0 0 2swap >number rot drop ( u ... a u)
    dup if  over c@ [char] : = 1 and /string  then
  loop 2drop
  2 0 do  dup 0= if rot rot then  loop ;

: .T  cr  . ." sec "  . ." min " . ." hr " ;

s" 1:2:3"    /t .t
s" 02:03"    /t .t
s" 03"       /t .t
s" 23:59:59" /t .t
s" 0:00:03"  /t .t