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https://issues.apache.org/jira/browse/XALANC-291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steven J. Hathaway resolved XALANC-291.
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Resolution: Won't Fix
Obsolete Issue
> Floating point output incorrect
> -------------------------------
>
> Key: XALANC-291
> URL: https://issues.apache.org/jira/browse/XALANC-291
> Project: XalanC
> Issue Type: Bug
> Components: XalanC
> Affects Versions: 1.5
> Environment: Operating System: All
> Platform: All
> Reporter: Matt Hoyt
>
> Not sure if these should be logged as seperate bugs, but the source of the
> errors has been traced to limitations of the sprintf/"format string lookup
> table" of the DomStringHelper::DoubleToDOMString() method.
> (1) From conformance test 'string134' (simplified, source xml is irrelevant):
> <xsl:template match="/">
> <xsl:value-of select="987654321.012345"/>
> </xsl:template>
> Produces output:
> 987654321.01234496
> Why? The result number is the full decimal value of the binary approximation.
> In this case, the input's fraction only has 6 digits but the conversion
> method
> defaults to at least 10 digits of precision, resulting in the invalid output
> of
> extra values from the binary approximation. The output precision should be
> the
> same as the original value's.
> (2) From conformance test 'string135' (simplified, source xml is irrelevant):
> <xsl:template match="/">
> <xsl:value-of select=".000000000000000000000000000000000000123456789"/>
> </xsl:template>
> Produces output:
> 0
> Why? The conversion method will output 0 for values < 1.0e-35. According to
> the the XPath spec a number can be any double-precision 64-bit format IEEE
> 754
> number. This all means values > 1.0e-323 should be displayed. Currently,
> the
> conversion function is limited to creating strings with numbers containing at
> most 35 digits of precision.
> XalanJ 2.5.1, Saxon 6.5.2 and MSXSL 3.0 behave correctly in these cases.
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