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| How to read "Message Identifier Bytes" in C code? |
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| gbaddeley |
 Posted: Sun Nov 06, 2011 2:59 pm Post subject: |
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Jedi Knight
Joined: 25 Mar 2003
Posts: 2538
Location: Melbourne, Australia
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| rekarm01 wrote: |
| gbaddeley wrote: |
| The sprintf needs format specification "%02X" to print 2 hex bytes per array entry. |
"%.2X" will probably work better. |
I haven't tried "%.2X" but "%02X" works perfectly for me on Windows, z/OS and a range of UNIX platforms and compilers.
_________________
Glenn |
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| rekarm01 |
| Posted: Mon Nov 07, 2011 1:49 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 1415
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| gbaddeley wrote: |
| I haven't tried "%.2X" but "%02X" works perfectly for me on Windows, z/OS and a range of UNIX platforms and compilers. |
Hmm ... so it does. For "%X", either specification will work just as well:- "%02X" prints a minimum of two characters, padding with leading zeroes as needed.
- "%.2X" prints a minimum of two digits, padding with leading zeroes as needed.
- For "%X", there is no sign character, decimal point, or fractional part, so the number of characters is the same as the number of digits.
But this only takes care of adding a leading zero to single-digit hexadecimal values. In order to get rid of the extraneous "FFFFFF" characters ...
| mvic wrote: |
| unsigned char is probably needed |
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