RE: Decimal to hexadecimal in one function (XSLT/XPath

Something like this perhaps:

<xsl:function name="my:int-to-hex" as="xs:string">
  <xsl:param name="in" as="xs:integer"/>
  <xsl:sequence select="if ($in eq 0) then '0' 
                        else concat(if ($in gt 16 then my:int-to-hex($in
idiv 16) else '',
                               substring('0123456789ABCDEF', ($in mod 16) +
1, 1)))"/>
</xsl:function>

But what's wrong with having two functions anyway?

Incidentally, do try to get into the habit of declaring your parameter and
return types. It helps people reading your code, it helps the compiler, and
it helps you.

Michael Kay
http://www.saxonica.com/

> -----Original Message-----
> From: Yves Forkl [mailto:Y.Forkl@xxxxxx] 
> Sent: 17 February 2009 11:23
> To: xsl-list
> Subject:  Decimal to hexadecimal in one function (XSLT/XPath 2)
> 
> Hi,
> 
> I want to convert the decimal integers returned by the XPath 
> 2 function fn:string-to-codepoints into a sequence of strings 
> that use the conventional "U+..." hexadecimal notation of the 
> Unicode standard.
> 
> Neither the XPath 2 spec nor the XSLT FAQ offered a complete 
> solution to this problem, so I developed my own. It is 
> working, but I wonder how to integrate these two functions, 
> which convert a decimal integer into its hexadecimal 
> equivalent, into a single function which still returns just 
> one string:
> 
> <xsl:function name="my:decimal-to-hex" as="xs:string">
>    <xsl:param name="decimalNumber"/>
>    <xsl:sequence
> select="string-join(my:decimal-to-hex-internal($decimalNumber),'')"/>
> </xsl:function>
> 
> <xsl:function name="my:decimal-to-hex-internal" as="xs:string+">
>    <xsl:param name="decimalNumber"/>
>    <xsl:variable name="hexDigits" select="'0123456789ABCDEF'"/>
>    <xsl:if test="$decimalNumber &gt;= 16">
>      <xsl:sequence
>        
> select="my:decimal-to-hex-internal(floor($decimalNumber div 16))"/>
>    </xsl:if>
>    <xsl:sequence
>      select="substring($hexDigits, ($decimalNumber mod 16) + 
> 1, 1)"/> </xsl:function>
> 
> 
>    Yves