[jira] [Updated] (FOP-2920) [PATCH] Surrogate pair edge-case causes java.lang.ArrayIndexOutOfBoundsException

["Chris Bowditch (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FOP-2920?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chris Bowditch updated FOP-2920:
--------------------------------
    Summary: [PATCH] Surrogate pair edge-case causes java.lang.ArrayIndexOutOfBoundsException  (was: Surrogate pair edge-case causes java.lang.ArrayIndexOutOfBoundsException)

> [PATCH] Surrogate pair edge-case causes java.lang.ArrayIndexOutOfBoundsException
> --------------------------------------------------------------------------------
>
>                 Key: FOP-2920
>                 URL: https://issues.apache.org/jira/browse/FOP-2920
>             Project: FOP
>          Issue Type: Bug
>          Components: renderer/pdf
>    Affects Versions: trunk
>         Environment: macOS Mojave
> java version "1.8.0_192-ea"
> Java(TM) SE Runtime Environment (build 1.8.0_192-ea-b04)
> Java HotSpot(TM) 64-Bit Server VM (build 25.192-b04, mixed mode)
>            Reporter: Kelly H Wilkerson
>            Priority: Minor
>         Attachments: TwitterColorEmoji-SVGinOT.ttf, diff.txt, fail.xml, twe_template.fo, twe_userconfig.xml
>
>
> fop-core/src/main/java/org/apache/fop/pdf/PDFToUnicodeCMap.java writeBFCharEntries runs through the codepoint entries in sections of 100 at a time. It looks like there's an edge case here where the last entry in the section is a surrogate pair.
>  
> Here's my steps to reproduce from the latest trunk:
> {{java -cp fop/target/fop-2.5.0-SNAPSHOT.jar:fop/lib/commons-logging-1.0.4.jar:fop/lib/commons-io-1.3.1.jar:fop/lib/xmlgraphics-commons-svn-trunk.jar org.apache.fop.fonts.apps.TTFReader TwitterColorEmoji-SVGinOT.ttf twe.xml}}
> {{java -cp fop/target/fop-2.5.0-SNAPSHOT.jar:fop/lib/commons-logging-1.0.4.jar:fop/lib/commons-io-1.3.1.jar:fop/lib/xmlgraphics-commons-svn-trunk.jar:fop/lib/batik-all-1.11.0-SNAPSHOT.jar org.apache.fop.cli.Main -c twe_userconfig.xml -xsl twe_template.fo -xml fail.xml -pdf fail.pdf}}
>  
> Here's the temporary way I resolved it for my own build:
>  
> index ee773dcec..37c21803e 100644
> --- a/fop-core/src/main/java/org/apache/fop/pdf/PDFToUnicodeCMap.java
> +++ b/fop-core/src/main/java/org/apache/fop/pdf/PDFToUnicodeCMap.java
> @@ -128,6 +128,18 @@ public class PDFToUnicodeCMap extends PDFCMap {
>  while (partOfRange(charArray, charIndex)) {
>  charIndex++;
>  }
> /*
>  * If this entry is going to overflow the entriesThisSection
>  * array, then don't use it. This happens if there are
>  * non-pair entries in the table mixed with pair entries.
>  */
>  if (Character.codePointAt(charArray, charIndex) > 0xFFFF
>  && i+1 >= entriesThisSection) {
>  entriesThisSection--;
>  break;
>  }
> writer.write("<" + padCharIndex(charIndex) + "> ");
> if (Character.codePointAt(charArray, charIndex) > 0xFFFF) {



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