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· Jul 12, 2017

Is there a function for convert string to hex?

#Caché

hi

  is there a built in function for convert string to hex.  for example

"abc"   convert to "616263"

thanks

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Sean Connelly · Jul 12, 2017

I don't think there is a function that will do it in one step for you.

There is the $zhex function which will convert a decimal to a hex value.

If you combine it with $ascii you can do one character at a time...

>w $zhex($ascii("a"))
61


Use a for loop and you can get the result you want...

>set hex="" for i=1:1:$l("abc") set hex=hex_$zhex($ascii($e("abc",i)))
>w hex
616263


There is also a utility which may of be of use to you when working on the command line...

>zzdump "abc"
0000: 61 62 63


Sean

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Vitaliy Serdtsev · Jul 18, 2017

The solution with ##class(%xsd.hexBinary).LogicalToXSD works, but be careful, it only works when all characters in the string have codes <256.

All right, because the function works with an array of bytes (binary).
Therefore pre-to need lead N-byte string to single-byte string and only then do the conversion, for example:

f trantable="SAME","UTF8" {
 w "-------",!,trantable,!
 s xN="π=3.14159..." zzdump xN w !
 s x1=$zcvt(xN,"O",trantable) zzdump x1 w !!
     
 s hex=##class(%xsd.hexBinary).LogicalToXSD(x1)
 zw hex
     
 w $zcvt(##class(%xsd.hexBinary).XSDToLogical(hex),"I",trantable),!!
}

USER>d ^test
-------
SAME
 
0000: 03C0 003D 0033 002E 0031 0034 0031 0035                 π=3.1415
0008: 0039 002E 002E 002E                                     9...
 
0000: C0 03 3D 00 33 00 2E 00 31 00 34 00 31 00 35 00         À.=.3...1.4.1.5.
0010: 39 00 2E 00 2E 00 2E 00                                 9.......
 
hex="C0033D0033002E00310034003100350039002E002E002E00"
π=3.14159...
 
-------
UTF8
 
0000: 03C0 003D 0033 002E 0031 0034 0031 0035                 π=3.1415
0008: 0039 002E 002E 002E                                     9...
 
0000: CF 80 3D 33 2E 31 34 31 35 39 2E 2E 2E                  Ï.=3.14159...
 
hex="CF803D332E31343135392E2E2E"
π=3.14159...
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