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Feb 7th, 2018, 11:51 PM
#1
Thread Starter
Lively Member
[RESOLVED] SMS PDU Calculation
Guyz,
What is the meaning of it?? I need a strip down of it...:
Code:
PDUCodes(i).Length - Val("&H" & Mid(PDUCodes(i), 1, 2)) * 2 - 2) / 2
PDUCodes(i) is a loooong hex string of SMS PDU. That's for sure... Like:
Code:
07915892000000F001000B915892214365F7000021493A283D0795C3F33C88FE06CDCB6E32885EC6D341EDF27C1E3E97E72E
and the final result should come 42 after this calculation.
Ref: http://www.developershome.com/sms/cmgsCommand4.asp
Mshu~
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Feb 8th, 2018, 12:01 PM
#2
Re: SMS PDU Calculation
This part: Mid(PDUCodes(i), 1, 2)
...gets the first two characters of PDUCodes(i), so is the same as "07"
This part: Val("&H" & "07")
...gets the numerical value of the Hex value (converted to decimal), so in this case 7.
The rest is simple maths, so you can probably work all that out yourself.
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Feb 8th, 2018, 12:24 PM
#3
Re: SMS PDU Calculation
Originally Posted by aq_mishu
...
and the final result should come 42 after this calculation.
...
I tested it and the final result is 42, so the code works.
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Feb 8th, 2018, 01:38 PM
#4
Thread Starter
Lively Member
Re: SMS PDU Calculation
Originally Posted by si_the_geek
The rest is simple maths, so you can probably work all that out yourself.
If i'm not that stupid in maths:
Code:
(PDUCodes(i).Length - Val("&H" & Mid(PDUCodes(i), 1, 2)) * 2 - 2) / 2
for
Code:
07915892000000F001000B915892214365F7000021493A283D0795C3F33C88FE06CDCB6E32885EC6D341EDF27C1E3E97E72E
= 100 chars
VAL(&H07) = 07
hence it is: (100 - (7*2-2))/2 = (100 - 12)/2 = 44
????????
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Feb 8th, 2018, 03:15 PM
#5
Re: SMS PDU Calculation
You have your parentheses wrong.
It isn't (100 - (7*2-2))/2 = (100 - 12)/2 = 44
its (100 - (7)*2-2)/2 i.e. (100 - 7 * 2 - 2) / 2
Code:
(PDUCodes(i).Length - Val("&H" & Mid(PDUCodes(i), 1, 2)) * 2 - 2) / 2
( 100 - ( 7 ) * 2 - 2) / 2
If you type in your immediate window...
? (100 - 7 * 2 - 2)/2
you get
42
The order of operations is:
Code:
(100 - 7 * 2 - 2) / 2
(100 - 14 - 2) / 2
( 86 - 2) / 2
( 84 ) / 2
42
Last edited by passel; Feb 8th, 2018 at 03:28 PM.
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Feb 8th, 2018, 05:45 PM
#6
Thread Starter
Lively Member
Re: SMS PDU Calculation
OKdoki!!
Yep!! I discovered it after you said... p a r e n t h e s i s huh!!
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