Xml XSLT：将通配符掩码转换为网络掩码&；网络掩码格式

我有一个具有以下结构的XML输入：

<address>
    <ip>192.168.7.5</ip>
    <netmask>16</netmask>
    <wildcard-mask>0.0.0.255</wildcard-mask>
    <enable-wildcard-mask>false</enable-wildcard-mask>
</address>

192.168.7.5
16
0.0.0.255
假的

我想创建一个XSLT转换，它接受这个输入并使用 如果“启用通配符掩码”为true，则为“通配符掩码”值；如果“启用通配符掩码”为false，则为“网络掩码”值。 但是，必须将网络掩码从该格式“24”转换为“255.255.255.0”，并且必须将通配符掩码转换为网络掩码（二进制求反）

因此，此XSLT的输出应该类似于：

<netmask>255.255.255.0</netmask>

255.255.255.0

如果“启用通配符掩码”为真，并且

<netmask>255.255.0.0</netmask>

255.255.0.0

如果“启用通配符掩码”为false

这是用于测试的基本XSLT代码：

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="address">
    <xsl:choose>
        <xsl:when test="wildcard-mask and (enable-wildcard-mask/text()='true')">
            <netmask type="string"><xsl:value-of select="wildcard-mask"/></netmask>
        </xsl:when>
        <xsl:when test="netmask">
            <netmask type="string"><xsl:value-of select="netmask"/></netmask>
        </xsl:when>
        <xsl:otherwise>
        </xsl:otherwise>
    </xsl:choose>
</xsl:template>
</xsl:stylesheet>

---

如何在XSLT中进行必要的位转换？

最后，我使用查找表实现了转换，因为每个转换只有32个条目

因此，第一个查找表将通配符掩码转换为网络掩码，第二个查找表将格式为“/24”的网络掩码转换为格式为255.255.255.0

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="address">
    <xsl:choose>
        <!-- These 2 look-up tables convert a wildcard to a netmask, and a netmask in this form '/24' to '255.255.255.0', respectively -->
        <xsl:when test="wildcard-mask and (enable-wildcard-mask/text()='true')">
            <xsl:choose>
                <xsl:when test="(wildcard-mask/text()='255.255.255.255')"><netmask type="string">0.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='127.255.255.255')"><netmask type="string">128.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='63.255.255.255')"><netmask type="string">192.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='31.255.255.255')"><netmask type="string">224.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='15.255.255.255')"><netmask type="string">240.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='7.255.255.255')"><netmask type="string">248.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='3.255.255.255')"><netmask type="string">252.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='1.255.255.255')"><netmask type="string">254.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.255.255.255')"><netmask type="string">255.0.0.0</netmask></xsl:when>

                <xsl:when test="(wildcard-mask/text()='0.255.255.255')"><netmask type="string">255.0.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.127.255.255')"><netmask type="string">255.128.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.63.255.255')"><netmask type="string">255.192.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.31.255.255')"><netmask type="string">255.224.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.15.255.255')"><netmask type="string">255.240.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.7.255.255')"><netmask type="string">255.248.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.3.255.255')"><netmask type="string">255.252.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.1.255.255')"><netmask type="string">255.254.0.0</netmask></xsl:when>

                <xsl:when test="(wildcard-mask/text()='0.0.255.255')"><netmask type="string">255.255.0.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.127.255')"><netmask type="string">255.255.128.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.63.255')"><netmask type="string">255.255.192.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.31.255')"><netmask type="string">255.255.224.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.15.255')"><netmask type="string">255.255.240.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.7.255')"><netmask type="string">255.255.248.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.3.255')"><netmask type="string">255.255.252.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.1.255')"><netmask type="string">255.255.254.0</netmask></xsl:when>

                <xsl:when test="(wildcard-mask/text()='0.0.0.255')"><netmask type="string">255.255.255.0</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.0.127')"><netmask type="string">255.255.255.128</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.0.63')"><netmask type="string">255.255.255.192</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.0.31')"><netmask type="string">255.255.255.224</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.0.15')"><netmask type="string">255.255.255.240</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.0.7')"><netmask type="string">255.255.255.248</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.0.3')"><netmask type="string">255.255.255.252</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.0.1')"><netmask type="string">255.255.255.254</netmask></xsl:when>
                <xsl:when test="(wildcard-mask/text()='0.0.0.0')"><netmask type="string">255.255.255.255</netmask></xsl:when>
                <xsl:otherwise></xsl:otherwise>
            </xsl:choose>
        </xsl:when>
        <xsl:when test="netmask">
            <xsl:choose>
                <xsl:when test="(netmask/text()='0')"><netmask type="string">0.0.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='1')"><netmask type="string">128.0.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='2')"><netmask type="string">192.0.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='3')"><netmask type="string">224.0.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='4')"><netmask type="string">240.0.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='5')"><netmask type="string">248.0.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='6')"><netmask type="string">252.0.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='7')"><netmask type="string">254.0.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='8')"><netmask type="string">255.0.0.0</netmask></xsl:when>

                <xsl:when test="(netmask/text()='9')"><netmask type="string">255.128.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='10')"><netmask type="string">255.192.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='11')"><netmask type="string">255.224.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='12')"><netmask type="string">255.240.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='13')"><netmask type="string">255.248.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='14')"><netmask type="string">255.252.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='15')"><netmask type="string">255.254.0.0</netmask></xsl:when>

                <xsl:when test="(netmask/text()='16')"><netmask type="string">255.255.0.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='17')"><netmask type="string">255.255.128.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='18')"><netmask type="string">255.255.192.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='19')"><netmask type="string">255.255.224.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='20')"><netmask type="string">255.255.240.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='21')"><netmask type="string">255.255.248.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='22')"><netmask type="string">255.255.252.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='23')"><netmask type="string">255.255.254.0</netmask></xsl:when>

                <xsl:when test="(netmask/text()='24')"><netmask type="string">255.255.255.0</netmask></xsl:when>
                <xsl:when test="(netmask/text()='25')"><netmask type="string">255.255.255.128</netmask></xsl:when>
                <xsl:when test="(netmask/text()='26')"><netmask type="string">255.255.255.192</netmask></xsl:when>
                <xsl:when test="(netmask/text()='27')"><netmask type="string">255.255.255.224</netmask></xsl:when>
                <xsl:when test="(netmask/text()='28')"><netmask type="string">255.255.255.240</netmask></xsl:when>
                <xsl:when test="(netmask/text()='29')"><netmask type="string">255.255.255.248</netmask></xsl:when>
                <xsl:when test="(netmask/text()='30')"><netmask type="string">255.255.255.252</netmask></xsl:when>
                <xsl:when test="(netmask/text()='31')"><netmask type="string">255.255.255.254</netmask></xsl:when>
                <xsl:when test="(netmask/text()='32')"><netmask type="string">255.255.255.255</netmask></xsl:when>
                <xsl:otherwise></xsl:otherwise>
            </xsl:choose>
        </xsl:when>
        <xsl:otherwise>
        </xsl:otherwise>
    </xsl:choose>
</xsl:template>
</xsl:stylesheet>

0.0.0.0
128.0.0.0
192.0.0.0
224.0.0.0
240.0.0.0
248.0.0.0
252.0.0.0
254.0.0.0
255.0.0.0
255.0.0.0
255.128.0.0
255.192.0.0
255.224.0.0
255.240.0.0
255.248.0.0
255.252.0.0
255.254.0.0
255.255.0.0
255.255.128.0
255.255.192.0
255.255.224.0
255.255.240.0
255.255.248.0
255.255.252.0
255.255.254.0
255.255.255.0
255.255.255.128
255.255.255.192
255.255.255.224
255.255.255.240
255.255.255.248
255.255.255.252
255.255.255.254
255.255.255.255
0.0.0.0
128.0.0.0
192.0.0.0
224.0.0.0
240.0.0.0
248.0.0.0
252.0.0.0
254.0.0.0
255.0.0.0
255.128.0.0
255.192.0.0
255.224.0.0
255.240.0.0
255.248.0.0
255.252.0.0
255.254.0.0
255.255.0.0
255.255.128.0
255.255.192.0
255.255.224.0
255.255.240.0
255.255.248.0
255.255.252.0
255.255.254.0
255.255.255.0
255.255.255.128
255.255.255.192
255.255.255.224
255.255.255.240
255.255.255.248
255.255.255.252
255.255.255.254
255.255.255.255

这里已经有了一个关于位逻辑的问题：最近，EXPath二进制模块已经面世，它提供了一个用于操作二进制数据的函数库。它在Saxon等正在积极开发的产品中可用，但在旧的XSLT1.0处理器中当然不可用。