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布尔操作函数
<![CDATA[
<!-- ======================================================== -->
<!-- Function: BooleanOR(<value1>,<value2>) => number -->
<!-- Parameters:- -->
<!-- <value1> - the first number to be ORed -->
<!-- <value2> - the second number to be ORed -->
<!-- NB. Only works with unsigned ints! -->
<xsl:template name="BooleanOR">
<xsl:param name="value1" select="number(0)"/>
<xsl:param name="value2" select="number(0)"/>
<!-- recurse parameters -->
<xsl:param name="bitval" select="number(2147483648)"/>
<xsl:param name="accum" select="number(0)"/>
<!-- calc bits present on values -->
<xsl:variable name="bit1" select="floor($value1 div $bitval)"/>
<xsl:variable name="bit2" select="floor($value2 div $bitval)"/>
<!-- do the OR on the bits -->
<xsl:variable name="thisbit">
<xsl:choose>
<xsl:when test="($bit1 != 0) or ($bit2 != 0)"><xsl:value-of select="$bitval"/></xsl:when>
<xsl:otherwise>0</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<!-- if last recurse then output the value -->
<xsl:choose>
<xsl:when test="$bitval = 1"><xsl:value-of select="$accum + $thisbit"/></xsl:when>
<xsl:otherwise>
<!-- recurse required -->
<xsl:call-template name="BooleanOR">
<xsl:with-param name="value1" select="$value1 mod $bitval"/>
<xsl:with-param name="value2" select="$value2 mod $bitval"/>
<xsl:with-param name="bitval" select="$bitval div 2"/>
<xsl:with-param name="accum" select="$accum + $thisbit"/>
</xsl:call-template>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<!-- ======================================================== -->
<!-- Function: BooleanAND(<value1>,<value2>) => number -->
<!-- Parameters:- -->
<!-- <value1> - the first number to be ANDed -->
<!-- <value2> - the second number to be ANDed -->
<!-- NB. Only works with unsigned ints! -->
<xsl:template name="BooleanAND">
<xsl:param name="value1" select="number(0)"/>
<xsl:param name="value2" select="number(0)"/>
<!-- recurse parameters -->
<xsl:param name="bitval" select="number(2147483648)"/>
<xsl:param name="accum" select="number(0)"/>
<!-- calc bits present on values -->
<xsl:variable name="bit1" select="floor($value1 div $bitval)"/>
<xsl:variable name="bit2" select="floor($value2 div $bitval)"/>
<!-- do the AND on the bits -->
<xsl:variable name="thisbit">
<xsl:choose>
<xsl:when test="($bit1 != 0) and ($bit2 != 0)"><xsl:value-of select="$bitval"/></xsl:when>
<xsl:otherwise>0</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<!-- if last recurse then output the value -->
<xsl:choose>
<xsl:when test="$bitval = 1"><xsl:value-of select="$accum + $thisbit"/></xsl:when>
<xsl:otherwise>
<!-- recurse required -->
<xsl:call-template name="BooleanAND">
<xsl:with-param name="value1" select="$value1 mod $bitval"/>
<xsl:with-param name="value2" select="$value2 mod $bitval"/>
<xsl:with-param name="bitval" select="$bitval div 2"/>
<xsl:with-param name="accum" select="$accum + $thisbit"/>
</xsl:call-template>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<!-- ======================================================== -->
<!-- Function: BooleanXOR(<value1>,<value2>) => number -->
<!-- Parameters:- -->
<!-- <value1> - the first number to be XORed -->
<!-- <value2> - the second number to be XORed -->
<!-- NB. Only works with unsigned ints! -->
<xsl:template name="BooleanXOR">
<xsl:param name="value1" select="number(0)"/>
<xsl:param name="value2" select="number(0)"/>
<!-- recurse parameters -->
<xsl:param name="bitval" select="number(2147483648)"/>
<xsl:param name="accum" select="number(0)"/>
<!-- calc bits present on values -->
<xsl:variable name="bit1" select="floor($value1 div $bitval)"/>
<xsl:variable name="bit2" select="floor($value2 div $bitval)"/>
<!-- do the XOR on the bits -->
<xsl:variable name="thisbit">
<xsl:choose>
<xsl:when test="(($bit1 != 0) and ($bit2 = 0)) or (($bit1 = 0) and ($bit2
!= 0))"><xsl:value-of select="$bitval"/></xsl:when>
<xsl:otherwise>0</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<!-- if last recurse then output the value -->
<xsl:choose>
<xsl:when test="$bitval = 1"><xsl:value-of select="$accum + $thisbit"/></xsl:when>
<xsl:otherwise>
<!-- recurse required -->
<xsl:call-template name="BooleanXOR">
<xsl:with-param name="value1" select="$value1 mod $bitval"/>
<xsl:with-param name="value2" select="$value2 mod $bitval"/>
<xsl:with-param name="bitval" select="$bitval div 2"/>
<xsl:with-param name="accum" select="$accum + $thisbit"/>
</xsl:call-template>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
]]>
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