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402 lines
12 KiB
402 lines
12 KiB
<?xml version="1.0" encoding="UTF-8"?>
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<!--
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xml2dot.xsl - transform Bison XML Report into DOT.
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Copyright (C) 2007-2015, 2018-2019 Free Software Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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Written by Wojciech Polak <polak@gnu.org>.
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-->
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<xsl:stylesheet version="1.0"
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xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
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xmlns:bison="http://www.gnu.org/software/bison/">
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<xsl:import href="bison.xsl"/>
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<xsl:output method="text" encoding="UTF-8" indent="no"/>
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<xsl:template match="/">
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<xsl:apply-templates select="bison-xml-report"/>
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</xsl:template>
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<xsl:template match="bison-xml-report">
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<xsl:text>// Generated by GNU Bison </xsl:text>
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<xsl:value-of select="@version"/>
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<xsl:text>. </xsl:text>
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<xsl:text>// Report bugs to <</xsl:text>
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<xsl:value-of select="@bug-report"/>
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<xsl:text>>. </xsl:text>
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<xsl:text>// Home page: <</xsl:text>
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<xsl:value-of select="@url"/>
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<xsl:text>>. </xsl:text>
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<xsl:apply-templates select="automaton">
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<xsl:with-param name="filename" select="filename"/>
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</xsl:apply-templates>
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</xsl:template>
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<xsl:template match="automaton">
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<xsl:param name="filename"/>
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<xsl:text>digraph "</xsl:text>
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<xsl:call-template name="escape">
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<xsl:with-param name="subject" select="$filename"/>
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</xsl:call-template>
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<xsl:text>" {
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node [fontname = courier, shape = box, colorscheme = paired6]
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edge [fontname = courier]
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</xsl:text>
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<xsl:apply-templates select="state"/>
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<xsl:text>} </xsl:text>
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</xsl:template>
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<xsl:template match="automaton/state">
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<xsl:call-template name="output-node">
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<xsl:with-param name="number" select="@number"/>
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<xsl:with-param name="label">
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<xsl:apply-templates select="itemset/item"/>
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</xsl:with-param>
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</xsl:call-template>
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<xsl:apply-templates select="actions/transitions"/>
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<xsl:apply-templates select="actions/reductions">
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<xsl:with-param name="staten">
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<xsl:value-of select="@number"/>
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</xsl:with-param>
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</xsl:apply-templates>
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</xsl:template>
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<xsl:template match="actions/reductions">
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<xsl:param name="staten"/>
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<xsl:for-each select='reduction'>
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<!-- These variables are needed because the current context can't be
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referred to directly in XPath expressions. -->
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<xsl:variable name="rul">
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<xsl:value-of select="@rule"/>
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</xsl:variable>
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<xsl:variable name="ena">
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<xsl:value-of select="@enabled"/>
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</xsl:variable>
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<!-- The foreach's body is protected by this, so that we are actually
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going to iterate once per reduction rule, and not per lookahead. -->
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<xsl:if test='not(preceding-sibling::*[@rule=$rul and @enabled=$ena])'>
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<xsl:variable name="rule">
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<xsl:choose>
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<!-- The acceptation state is referred to as 'accept' in the XML, but
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just as '0' in the DOT. -->
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<xsl:when test="@rule='accept'">
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<xsl:text>0</xsl:text>
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</xsl:when>
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<xsl:otherwise>
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<xsl:value-of select="@rule"/>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:variable>
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<!-- The edge's beginning -->
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<xsl:call-template name="reduction-edge-start">
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<xsl:with-param name="state" select="$staten"/>
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<xsl:with-param name="rule" select="$rule"/>
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<xsl:with-param name="enabled" select="@enabled"/>
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</xsl:call-template>
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<!-- The edge's tokens -->
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<!-- Don't show labels for the default action. In other cases, there will
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always be at least one token, so 'label="[]"' will not occur. -->
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<xsl:if test='$rule!=0 and not(../reduction[@enabled=$ena and @rule=$rule and @symbol="$default"])'>
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<xsl:text>label="[</xsl:text>
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<xsl:for-each select='../reduction[@enabled=$ena and @rule=$rule]'>
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<xsl:call-template name="escape">
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<xsl:with-param name="subject" select="@symbol"/>
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</xsl:call-template>
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<xsl:if test="position() != last ()">
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<xsl:text>, </xsl:text>
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</xsl:if>
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</xsl:for-each>
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<xsl:text>]", </xsl:text>
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</xsl:if>
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<!-- The edge's end -->
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<xsl:text>style=solid] </xsl:text>
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<!-- The diamond representing the reduction -->
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<xsl:call-template name="reduction-node">
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<xsl:with-param name="state" select="$staten"/>
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<xsl:with-param name="rule" select="$rule"/>
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<xsl:with-param name="color">
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<xsl:choose>
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<xsl:when test='@enabled="true"'>
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<xsl:text>3</xsl:text>
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</xsl:when>
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<xsl:otherwise>
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<xsl:text>5</xsl:text>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:with-param>
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</xsl:call-template>
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</xsl:if>
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</xsl:for-each>
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</xsl:template>
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<xsl:template match="actions/transitions">
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<xsl:apply-templates select="transition"/>
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</xsl:template>
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<xsl:template match="item">
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<xsl:param name="prev-rule-number"
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select="preceding-sibling::item[1]/@rule-number"/>
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<xsl:apply-templates select="key('bison:ruleByNumber', @rule-number)">
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<xsl:with-param name="point" select="@point"/>
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<xsl:with-param name="num" select="@rule-number"/>
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<xsl:with-param name="prev-lhs"
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select="key('bison:ruleByNumber', $prev-rule-number)/lhs[text()]"
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/>
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</xsl:apply-templates>
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<xsl:apply-templates select="lookaheads"/>
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</xsl:template>
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<xsl:template match="rule">
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<xsl:param name="point"/>
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<xsl:param name="num"/>
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<xsl:param name="prev-lhs"/>
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<xsl:text> </xsl:text>
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<xsl:choose>
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<xsl:when test="$num < 10">
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<xsl:text> </xsl:text>
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</xsl:when>
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<xsl:when test="$num < 100">
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<xsl:text> </xsl:text>
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</xsl:when>
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<xsl:otherwise>
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<xsl:text></xsl:text>
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</xsl:otherwise>
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</xsl:choose>
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<xsl:value-of select="$num"/>
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<xsl:text> </xsl:text>
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<xsl:choose>
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<xsl:when test="$prev-lhs = lhs[text()]">
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<xsl:call-template name="lpad">
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<xsl:with-param name="str" select="'|'"/>
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<xsl:with-param name="pad" select="number(string-length(lhs[text()])) + 1"/>
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</xsl:call-template>
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</xsl:when>
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<xsl:otherwise>
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<xsl:value-of select="lhs"/>
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<xsl:text>:</xsl:text>
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</xsl:otherwise>
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</xsl:choose>
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<xsl:if test="$point = 0">
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<xsl:text> .</xsl:text>
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</xsl:if>
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<!-- RHS -->
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<xsl:for-each select="rhs/symbol|rhs/empty">
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<xsl:apply-templates select="."/>
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<xsl:if test="$point = position()">
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<xsl:text> .</xsl:text>
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</xsl:if>
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</xsl:for-each>
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</xsl:template>
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<xsl:template match="symbol">
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<xsl:text> </xsl:text>
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<xsl:value-of select="."/>
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</xsl:template>
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<xsl:template match="empty">
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<xsl:text> %empty</xsl:text>
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</xsl:template>
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<xsl:template match="lookaheads">
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<xsl:text> [</xsl:text>
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<xsl:apply-templates select="symbol"/>
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<xsl:text>]</xsl:text>
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</xsl:template>
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<xsl:template match="lookaheads/symbol">
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<xsl:value-of select="."/>
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<xsl:if test="position() != last()">
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<xsl:text>, </xsl:text>
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</xsl:if>
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</xsl:template>
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<xsl:template name="reduction-edge-start">
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<xsl:param name="state"/>
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<xsl:param name="rule"/>
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<xsl:param name="enabled"/>
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<xsl:text> </xsl:text>
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<xsl:value-of select="$state"/>
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<xsl:text> -> "</xsl:text>
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<xsl:value-of select="$state"/>
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<xsl:text>R</xsl:text>
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<xsl:value-of select="$rule"/>
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<xsl:if test='$enabled = "false"'>
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<xsl:text>d</xsl:text>
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</xsl:if>
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<xsl:text>" [</xsl:text>
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</xsl:template>
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<xsl:template name="reduction-node">
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<xsl:param name="state"/>
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<xsl:param name="rule"/>
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<xsl:param name="color"/>
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<xsl:text> "</xsl:text>
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<xsl:value-of select="$state"/>
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<xsl:text>R</xsl:text>
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<xsl:value-of select="$rule"/>
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<xsl:if test="$color = 5">
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<xsl:text>d</xsl:text>
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</xsl:if>
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<xsl:text>" [label="</xsl:text>
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<xsl:choose>
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<xsl:when test="$rule = 0">
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<xsl:text>Acc", fillcolor=1</xsl:text>
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</xsl:when>
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<xsl:otherwise>
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<xsl:text>R</xsl:text>
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<xsl:value-of select="$rule"/>
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<xsl:text>", fillcolor=</xsl:text>
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<xsl:value-of select="$color"/>
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</xsl:otherwise>
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</xsl:choose>
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<xsl:text>, shape=diamond, style=filled] </xsl:text>
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</xsl:template>
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<xsl:template match="transition">
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<xsl:call-template name="output-edge">
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<xsl:with-param name="src" select="../../../@number"/>
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<xsl:with-param name="dst" select="@state"/>
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<xsl:with-param name="style">
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<xsl:choose>
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<xsl:when test="@symbol = 'error'">
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<xsl:text>dotted</xsl:text>
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</xsl:when>
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<xsl:when test="@type = 'shift'">
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<xsl:text>solid</xsl:text>
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</xsl:when>
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<xsl:otherwise>
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<xsl:text>dashed</xsl:text>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:with-param>
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<xsl:with-param name="label">
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<xsl:if test="not(@symbol = 'error')">
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<xsl:value-of select="@symbol"/>
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</xsl:if>
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</xsl:with-param>
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</xsl:call-template>
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</xsl:template>
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<xsl:template name="output-node">
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<xsl:param name="number"/>
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<xsl:param name="label"/>
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<xsl:text> </xsl:text>
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<xsl:value-of select="$number"/>
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<xsl:text> [label="</xsl:text>
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<xsl:text>State </xsl:text>
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<xsl:value-of select="$number"/>
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<xsl:text>\n</xsl:text>
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<xsl:call-template name="escape">
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<xsl:with-param name="subject" select="$label"/>
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</xsl:call-template>
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<xsl:text>\l"] </xsl:text>
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</xsl:template>
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<xsl:template name="output-edge">
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<xsl:param name="src"/>
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<xsl:param name="dst"/>
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<xsl:param name="style"/>
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<xsl:param name="label"/>
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<xsl:text> </xsl:text>
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<xsl:value-of select="$src"/>
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<xsl:text> -> </xsl:text>
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<xsl:value-of select="$dst"/>
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<xsl:text> [style=</xsl:text>
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<xsl:value-of select="$style"/>
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<xsl:if test="$label and $label != ''">
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<xsl:text> label="</xsl:text>
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<xsl:call-template name="escape">
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<xsl:with-param name="subject" select="$label"/>
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</xsl:call-template>
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<xsl:text>"</xsl:text>
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</xsl:if>
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<xsl:text>] </xsl:text>
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</xsl:template>
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<xsl:template name="escape">
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<xsl:param name="subject"/> <!-- required -->
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<xsl:call-template name="string-replace">
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<xsl:with-param name="subject">
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<xsl:call-template name="string-replace">
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<xsl:with-param name="subject">
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<xsl:call-template name="string-replace">
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<xsl:with-param name="subject" select="$subject"/>
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<xsl:with-param name="search" select="'\'"/>
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<xsl:with-param name="replace" select="'\\'"/>
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</xsl:call-template>
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</xsl:with-param>
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<xsl:with-param name="search" select="'"'"/>
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<xsl:with-param name="replace" select="'\"'"/>
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</xsl:call-template>
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</xsl:with-param>
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<xsl:with-param name="search" select="' '"/>
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<xsl:with-param name="replace" select="'\l'"/>
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</xsl:call-template>
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</xsl:template>
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<xsl:template name="string-replace">
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<xsl:param name="subject"/>
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<xsl:param name="search"/>
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<xsl:param name="replace"/>
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<xsl:choose>
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<xsl:when test="contains($subject, $search)">
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<xsl:variable name="before" select="substring-before($subject, $search)"/>
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<xsl:variable name="after" select="substring-after($subject, $search)"/>
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<xsl:value-of select="$before"/>
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<xsl:value-of select="$replace"/>
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<xsl:call-template name="string-replace">
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<xsl:with-param name="subject" select="$after"/>
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<xsl:with-param name="search" select="$search"/>
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<xsl:with-param name="replace" select="$replace"/>
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</xsl:call-template>
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</xsl:when>
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<xsl:otherwise>
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<xsl:value-of select="$subject"/>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:template>
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<xsl:template name="lpad">
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<xsl:param name="str" select="''"/>
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<xsl:param name="pad" select="0"/>
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<xsl:variable name="diff" select="$pad - string-length($str)" />
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<xsl:choose>
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<xsl:when test="$diff < 0">
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<xsl:value-of select="$str"/>
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</xsl:when>
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<xsl:otherwise>
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<xsl:call-template name="space">
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<xsl:with-param name="repeat" select="$diff"/>
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</xsl:call-template>
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<xsl:value-of select="$str"/>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:template>
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</xsl:stylesheet>
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