From 0554731052d1a97745cb179ab0d45620589dd9c4 Mon Sep 17 00:00:00 2001
From: Albert Astals Cid <aacid@kde.org>
Date: Fri, 7 Jun 2024 00:54:55 +0200
Subject: pdfinfo: Fix crash in broken documents when using -dests

Modified by Marek Kasik due to the backport.

diff --git a/utils/pdfinfo.cc b/utils/pdfinfo.cc
index 5d37ef64..7d569749 100644
--- a/utils/pdfinfo.cc
+++ b/utils/pdfinfo.cc
@@ -15,7 +15,7 @@
 // under GPL version 2 or later
 //
 // Copyright (C) 2006 Dom Lachowicz <cinamod@hotmail.com>
-// Copyright (C) 2007-2010, 2012, 2016-2020 Albert Astals Cid <aacid@kde.org>
+// Copyright (C) 2007-2010, 2012, 2016-2020, 2024 Albert Astals Cid <aacid@kde.org>
 // Copyright (C) 2010 Hib Eris <hib@hiberis.nl>
 // Copyright (C) 2011 Vittal Aithal <vittal.aithal@cognidox.com>
 // Copyright (C) 2012, 2013, 2016-2018 Adrian Johnson <ajohnson@redneon.com>
@@ -107,6 +107,23 @@ static const ArgDesc argDesc[] = { { "-f
                                    { "-?", argFlag, &printHelp, 0, "print usage information" },
                                    {} };
 
+static void printStdTextString(const std::string &s, const UnicodeMap *uMap)
+{
+    char buf[8];
+    Unicode *u;
+    int i, len;
+    GooString *s1 = new GooString(s);
+
+    if (s1 != nullptr) {
+        len = TextStringToUCS4(s1, &u);
+        for (i = 0; i < len; i++) {
+            int n = uMap->mapUnicode(u[i], buf, sizeof(buf));
+            fwrite(buf, 1, n, stdout);
+        }
+        delete s1;
+    }
+}
+
 static void printInfoString(Dict *infoDict, const char *key, const char *text, const UnicodeMap *uMap)
 {
     const GooString *s1;
@@ -278,11 +295,6 @@ static void printStruct(const StructElem
     }
 }
 
-struct GooStringCompare
-{
-    bool operator()(GooString *lhs, GooString *rhs) const { return lhs->cmp(const_cast<GooString *>(rhs)) < 0; }
-};
-
 static void printLinkDest(const std::unique_ptr<LinkDest> &dest)
 {
     GooString s;
@@ -353,29 +365,25 @@ static void printLinkDest(const std::uni
 
 static void printDestinations(PDFDoc *doc, const UnicodeMap *uMap)
 {
-    std::map<Ref, std::map<GooString *, std::unique_ptr<LinkDest>, GooStringCompare>> map;
+    std::map<Ref, std::map<std::string, std::unique_ptr<LinkDest>>> map;
 
     int numDests = doc->getCatalog()->numDestNameTree();
     for (int i = 0; i < numDests; i++) {
-        GooString *name = new GooString(doc->getCatalog()->getDestNameTreeName(i));
+        const GooString *name = doc->getCatalog()->getDestNameTreeName(i);
         std::unique_ptr<LinkDest> dest = doc->getCatalog()->getDestNameTreeDest(i);
-        if (dest && dest->isPageRef()) {
+        if (name && dest && dest->isPageRef()) {
             Ref pageRef = dest->getPageRef();
-            map[pageRef].insert(std::make_pair(name, std::move(dest)));
-        } else {
-            delete name;
+            map[pageRef].insert(std::make_pair(name->toStr(), std::move(dest)));
         }
     }
 
     numDests = doc->getCatalog()->numDests();
     for (int i = 0; i < numDests; i++) {
-        GooString *name = new GooString(doc->getCatalog()->getDestsName(i));
+        const char *name = doc->getCatalog()->getDestsName(i);
         std::unique_ptr<LinkDest> dest = doc->getCatalog()->getDestsDest(i);
-        if (dest && dest->isPageRef()) {
+        if (name && dest && dest->isPageRef()) {
             Ref pageRef = dest->getPageRef();
             map[pageRef].insert(std::make_pair(name, std::move(dest)));
-        } else {
-            delete name;
         }
     }
 
@@ -389,16 +397,8 @@ static void printDestinations(PDFDoc *do
                     printf("%4d ", i);
                     printLinkDest(it.second);
                     printf(" \"");
-                    Unicode *u;
-                    char buf[8];
-                    const int len = TextStringToUCS4(it.first, &u);
-                    for (int j = 0; j < len; j++) {
-                        const int n = uMap->mapUnicode(u[j], buf, sizeof(buf));
-                        fwrite(buf, 1, n, stdout);
-                    }
-                    gfree(u);
+                    printStdTextString(it.first, uMap);
                     printf("\"\n");
-                    delete it.first;
                 }
             }
         }