Re: The problem to compile Java stored function in Oracle

Boris Poliakovsky <>
Mon, 31 May 2010 06:44:38 -0700 (PDT)
On May 31, 3:56 pm, Lew <> wrote:

On 05/31/2010 04:29 AM, Boris Poliakovsky wrote:

* Add integers, wrapping at 2^32. This uses 16-bit operations
* to work around bugs in some JS interpreters.
private static int safe_add(byte x, byte y)

The Java coding conventions have no underscores in method names, and the =


of mixed "camel" case in identifiers, thus, "safeAdd()".

This method adds 'byte's, not 'int' values as implied by the incorrect co=


int rc0 = -1;
int lsw;
int msw;
lsw = (x& 0xFFFF) + (y& 0xFFFF);
msw = (x>> 16) + (y>> 16) + (lsw>> 16);
rc0 = (msw<< 16) | (lsw& 0xFFFF);
catch (Exception e)
rc0 = -1;
return rc0;


What the hell is this routine? This method is a WTF top to bottom.

Why does a Java method give a rat's ass about bugs in JS interpreters?

The (non-Javadoc!) comment blathers about 'int' addition wrapping at 32 b=


  Guess what! That's what 'int' addition does in Java anyway!

Not that that matters, because the arguments are 'byte's, not 'int's.

The result of a (non-existent) exception is to silently compute '-1'?!

Catch 'Exception'? That's an antipattern and in this case a clear subs=


for thought.

Where the hell is that stack trace supposed to show? And what, you nev=


heard of an error message or log?

And the method's 'private', yet never used.

I mentioned the shocking lack of indentation in my other post on this que=


Really, WTF?

Lew- Hide quoted text -

- Show quoted text -

Dear Lew,

I have never been working with Java and JavaScript before (I am PL/SQL
developer), but right now I have to translate one JavaScript as Java
Storted Function into Oracle. For begining I took three functions from
this script and translated as I understood.
Could you please explain me haw I can do it properly ?

The source JavaScript functions are following:

- first /*
          * Convert a string to an array of little-endian words
          * If chrsz is ASCII, characters >255 have their hi-byte silently
            function str2binl(str)
           var bin = Array()
           var mask = (1 << chrsz) - 1
           for(var i = 0; i < str.length * chrsz; i += chrsz)
           bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32)
           return bin

- second
          * Add integers, wrapping at 2^32. This uses 16-bit operations
          * to work around bugs in some JS interpreters.
            function safe_add(x, y)
           var lsw = (x & 0xFFFF) + (y & 0xFFFF)
           var msw = (x >> 16) + (y >> 16) + (lsw >> 16)
           return (msw << 16) | (lsw & 0xFFFF)

          * Bitwise rotate a 32-bit number to the left.
            function rol(num, cnt)
           return (num << cnt) | (num >>> (32 - cnt))

With the best regards,

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