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guix/gnu/packages/patches/docbook-xsl-nonrecursive-st...

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Use a non-recursive replace function when the parser supports it.
https://bugs.gnu.org/29782
https://bugzilla.samba.org/show_bug.cgi?id=9515
https://bugzilla.gnome.org/show_bug.cgi?id=736077 (for xsltproc)
Patch copied from Debian:
https://salsa.debian.org/debian/docbook-xsl/-/blob/master/debian/patches/765567_non-recursive_string_subst.patch
Description: use EXSLT "replace" function when available
A recursive implementation of string.subst is problematic,
long strings with many matches will cause stack overflows.
Author: Peter De Wachter <pdewacht@gmail.com>
Bug-Debian: https://bugs.debian.org/750593
--- a/lib/lib.xsl
+++ b/lib/lib.xsl
@@ -6,7 +6,11 @@
This module implements DTD-independent functions
- ******************************************************************** --><xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
+ ******************************************************************** -->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+ xmlns:str="http://exslt.org/strings"
+ exclude-result-prefixes="str"
+ version="1.0">
<xsl:template name="dot.count">
<!-- Returns the number of "." characters in a string -->
@@ -52,6 +56,9 @@
<xsl:param name="replacement"/>
<xsl:choose>
+ <xsl:when test="function-available('str:replace')">
+ <xsl:value-of select="str:replace($string, string($target), string($replacement))"/>
+ </xsl:when>
<xsl:when test="contains($string, $target)">
<xsl:variable name="rest">
<xsl:call-template name="string.subst">