diff --git a/Makefile b/Makefile
index 02482206b9a..3fef3103d96 100644
--- a/Makefile
+++ b/Makefile
@@ -565,7 +565,7 @@ $(libcppdir)/checktype.o: lib/checktype.cpp lib/addoninfo.h lib/astutils.h lib/c
 $(libcppdir)/checkuninitvar.o: lib/checkuninitvar.cpp lib/addoninfo.h lib/astutils.h lib/check.h lib/checkers.h lib/checknullpointer.h lib/checkuninitvar.h lib/config.h lib/ctu.h lib/errorlogger.h lib/errortypes.h lib/library.h lib/mathlib.h lib/platform.h lib/settings.h lib/smallvector.h lib/sourcelocation.h lib/standards.h lib/symboldatabase.h lib/templatesimplifier.h lib/token.h lib/tokenize.h lib/tokenlist.h lib/utils.h lib/vfvalue.h
 	$(CXX) ${INCLUDE_FOR_LIB} $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $(libcppdir)/checkuninitvar.cpp
 
-$(libcppdir)/checkunusedfunctions.o: lib/checkunusedfunctions.cpp externals/tinyxml2/tinyxml2.h lib/addoninfo.h lib/astutils.h lib/checkers.h lib/checkunusedfunctions.h lib/config.h lib/errorlogger.h lib/errortypes.h lib/library.h lib/mathlib.h lib/path.h lib/platform.h lib/settings.h lib/smallvector.h lib/sourcelocation.h lib/standards.h lib/symboldatabase.h lib/templatesimplifier.h lib/token.h lib/tokenize.h lib/tokenlist.h lib/utils.h lib/vfvalue.h lib/xml.h
+$(libcppdir)/checkunusedfunctions.o: lib/checkunusedfunctions.cpp externals/tinyxml2/tinyxml2.h lib/addoninfo.h lib/analyzerinfo.h lib/astutils.h lib/checkers.h lib/checkunusedfunctions.h lib/config.h lib/errorlogger.h lib/errortypes.h lib/library.h lib/mathlib.h lib/path.h lib/platform.h lib/settings.h lib/smallvector.h lib/sourcelocation.h lib/standards.h lib/symboldatabase.h lib/templatesimplifier.h lib/token.h lib/tokenize.h lib/tokenlist.h lib/utils.h lib/vfvalue.h lib/xml.h
 	$(CXX) ${INCLUDE_FOR_LIB} $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $(libcppdir)/checkunusedfunctions.cpp
 
 $(libcppdir)/checkunusedvar.o: lib/checkunusedvar.cpp lib/addoninfo.h lib/astutils.h lib/check.h lib/checkers.h lib/checkunusedvar.h lib/config.h lib/errortypes.h lib/fwdanalysis.h lib/library.h lib/mathlib.h lib/platform.h lib/settings.h lib/smallvector.h lib/sourcelocation.h lib/standards.h lib/symboldatabase.h lib/templatesimplifier.h lib/token.h lib/tokenize.h lib/tokenlist.h lib/utils.h lib/valueflow.h lib/vfvalue.h
@@ -580,7 +580,7 @@ $(libcppdir)/clangimport.o: lib/clangimport.cpp lib/addoninfo.h lib/checkers.h l
 $(libcppdir)/color.o: lib/color.cpp lib/color.h lib/config.h
 	$(CXX) ${INCLUDE_FOR_LIB} $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $(libcppdir)/color.cpp
 
-$(libcppdir)/cppcheck.o: lib/cppcheck.cpp externals/picojson/picojson.h externals/simplecpp/simplecpp.h externals/tinyxml2/tinyxml2.h lib/addoninfo.h lib/analyzerinfo.h lib/check.h lib/checkers.h lib/checkunusedfunctions.h lib/clangimport.h lib/color.h lib/config.h lib/cppcheck.h lib/ctu.h lib/errorlogger.h lib/errortypes.h lib/filesettings.h lib/json.h lib/library.h lib/mathlib.h lib/path.h lib/platform.h lib/preprocessor.h lib/regex.h lib/settings.h lib/smallvector.h lib/sourcelocation.h lib/standards.h lib/suppressions.h lib/symboldatabase.h lib/templatesimplifier.h lib/timer.h lib/token.h lib/tokenize.h lib/tokenlist.h lib/utils.h lib/valueflow.h lib/version.h lib/vfvalue.h lib/xml.h
+$(libcppdir)/cppcheck.o: lib/cppcheck.cpp externals/picojson/picojson.h externals/simplecpp/simplecpp.h lib/addoninfo.h lib/analyzerinfo.h lib/check.h lib/checkers.h lib/checkunusedfunctions.h lib/clangimport.h lib/color.h lib/config.h lib/cppcheck.h lib/ctu.h lib/errorlogger.h lib/errortypes.h lib/filesettings.h lib/json.h lib/library.h lib/mathlib.h lib/path.h lib/platform.h lib/preprocessor.h lib/regex.h lib/settings.h lib/smallvector.h lib/sourcelocation.h lib/standards.h lib/suppressions.h lib/symboldatabase.h lib/templatesimplifier.h lib/timer.h lib/token.h lib/tokenize.h lib/tokenlist.h lib/utils.h lib/valueflow.h lib/version.h lib/vfvalue.h
 	$(CXX) ${INCLUDE_FOR_LIB} $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $(libcppdir)/cppcheck.cpp
 
 $(libcppdir)/ctu.o: lib/ctu.cpp externals/tinyxml2/tinyxml2.h lib/astutils.h lib/check.h lib/config.h lib/ctu.h lib/errorlogger.h lib/errortypes.h lib/library.h lib/mathlib.h lib/path.h lib/smallvector.h lib/sourcelocation.h lib/standards.h lib/symboldatabase.h lib/templatesimplifier.h lib/token.h lib/tokenize.h lib/tokenlist.h lib/utils.h lib/vfvalue.h lib/xml.h
diff --git a/lib/analyzerinfo.cpp b/lib/analyzerinfo.cpp
index 9477f2e290d..6d5ac9a9b15 100644
--- a/lib/analyzerinfo.cpp
+++ b/lib/analyzerinfo.cpp
@@ -209,3 +209,37 @@ bool AnalyzerInformation::Info::parse(const std::string& filesTxtLine) {
     return true;
 }
 
+// TODO: bail out on unexpected data
+void AnalyzerInformation::processFilesTxt(const std::string& buildDir, const std::function<void(const char* checkattr, const tinyxml2::XMLElement* e, const Info& filesTxtInfo)>& handler)
+{
+    const std::string filesTxt(buildDir + "/files.txt");
+    std::ifstream fin(filesTxt.c_str());
+    std::string filesTxtLine;
+    while (std::getline(fin, filesTxtLine)) {
+        AnalyzerInformation::Info filesTxtInfo;
+        if (!filesTxtInfo.parse(filesTxtLine)) {
+            return;
+        }
+
+        const std::string xmlfile = buildDir + '/' + filesTxtInfo.afile;
+
+        tinyxml2::XMLDocument doc;
+        const tinyxml2::XMLError error = doc.LoadFile(xmlfile.c_str());
+        if (error != tinyxml2::XML_SUCCESS)
+            return;
+
+        const tinyxml2::XMLElement * const rootNode = doc.FirstChildElement();
+        if (rootNode == nullptr)
+            return;
+
+        for (const tinyxml2::XMLElement *e = rootNode->FirstChildElement(); e; e = e->NextSiblingElement()) {
+            if (std::strcmp(e->Name(), "FileInfo") != 0)
+                continue;
+            const char *checkattr = e->Attribute("check");
+            if (checkattr == nullptr)
+                continue;
+            handler(checkattr, e, filesTxtInfo);
+        }
+    }
+}
+
diff --git a/lib/analyzerinfo.h b/lib/analyzerinfo.h
index 732587e0a71..04ea1a5b339 100644
--- a/lib/analyzerinfo.h
+++ b/lib/analyzerinfo.h
@@ -25,6 +25,7 @@
 
 #include <cstddef>
 #include <fstream>
+#include <functional>
 #include <list>
 #include <string>
 
@@ -33,6 +34,7 @@ struct FileSettings;
 
 namespace tinyxml2 {
     class XMLDocument;
+    class XMLElement;
 };
 
 /// @addtogroup Core
@@ -75,6 +77,8 @@ class CPPCHECKLIB AnalyzerInformation {
         std::string sourceFile;
     };
 
+    static void processFilesTxt(const std::string& buildDir, const std::function<void(const char* checkattr, const tinyxml2::XMLElement* e, const Info& filesTxtInfo)>& handler);
+
 protected:
     static std::string getFilesTxt(const std::list<std::string> &sourcefiles, const std::string &userDefines, const std::list<FileSettings> &fileSettings);
 
diff --git a/lib/checkunusedfunctions.cpp b/lib/checkunusedfunctions.cpp
index b45200d7128..7edaff6c241 100644
--- a/lib/checkunusedfunctions.cpp
+++ b/lib/checkunusedfunctions.cpp
@@ -20,6 +20,7 @@
 //---------------------------------------------------------------------------
 #include "checkunusedfunctions.h"
 
+#include "analyzerinfo.h"
 #include "astutils.h"
 #include "errorlogger.h"
 #include "errortypes.h"
@@ -34,7 +35,7 @@
 #include <algorithm>
 #include <cctype>
 #include <cstring>
-#include <fstream>
+#include <functional>
 #include <map>
 #include <sstream>
 #include <tuple>
@@ -457,55 +458,31 @@ void CheckUnusedFunctions::analyseWholeProgram(const Settings &settings, ErrorLo
     std::map<std::string, Location> decls;
     std::set<std::string> calls;
 
-    const std::string filesTxt(buildDir + "/files.txt");
-    std::ifstream fin(filesTxt.c_str());
-    std::string filesTxtLine;
-    while (std::getline(fin, filesTxtLine)) {
-        const std::string::size_type firstColon = filesTxtLine.find(':');
-        if (firstColon == std::string::npos)
-            continue;
-        const std::string::size_type secondColon = filesTxtLine.find(':', firstColon+1);
-        if (secondColon == std::string::npos)
-            continue;
-        const std::string xmlfile = buildDir + '/' + filesTxtLine.substr(0,firstColon);
-        const std::string sourcefile = filesTxtLine.substr(secondColon+1);
-
-        tinyxml2::XMLDocument doc;
-        const tinyxml2::XMLError error = doc.LoadFile(xmlfile.c_str());
-        if (error != tinyxml2::XML_SUCCESS)
-            continue;
-
-        const tinyxml2::XMLElement * const rootNode = doc.FirstChildElement();
-        if (rootNode == nullptr)
-            continue;
-
-        for (const tinyxml2::XMLElement *e = rootNode->FirstChildElement(); e; e = e->NextSiblingElement()) {
-            if (std::strcmp(e->Name(), "FileInfo") != 0)
+    const auto handler = [&decls, &calls](const char* checkattr, const tinyxml2::XMLElement* e, const AnalyzerInformation::Info& filesTxtInfo) {
+        if (std::strcmp(checkattr,"CheckUnusedFunctions") != 0)
+            return;
+        for (const tinyxml2::XMLElement *e2 = e->FirstChildElement(); e2; e2 = e2->NextSiblingElement()) {
+            const char* functionName = e2->Attribute("functionName");
+            if (functionName == nullptr)
                 continue;
-            const char *checkattr = e->Attribute("check");
-            if (checkattr == nullptr || std::strcmp(checkattr,"CheckUnusedFunctions") != 0)
+            const char* name = e2->Name();
+            if (std::strcmp(name,"functioncall") == 0) {
+                calls.insert(functionName);
                 continue;
-            for (const tinyxml2::XMLElement *e2 = e->FirstChildElement(); e2; e2 = e2->NextSiblingElement()) {
-                const char* functionName = e2->Attribute("functionName");
-                if (functionName == nullptr)
-                    continue;
-                const char* name = e2->Name();
-                if (std::strcmp(name,"functioncall") == 0) {
-                    calls.insert(functionName);
-                    continue;
-                }
-                if (std::strcmp(name,"functiondecl") == 0) {
-                    const char* lineNumber = e2->Attribute("lineNumber");
-                    if (lineNumber) {
-                        const char* file = e2->Attribute("file");
-                        const char* column = default_if_null(e2->Attribute("column"), "0");
-                        // cppcheck-suppress templateInstantiation - TODO: fix this - see #11631
-                        decls[functionName] = Location(file ? file : sourcefile, strToInt<int>(lineNumber), strToInt<int>(column));
-                    }
+            }
+            if (std::strcmp(name,"functiondecl") == 0) {
+                const char* lineNumber = e2->Attribute("lineNumber");
+                if (lineNumber) {
+                    const char* file = e2->Attribute("file");
+                    const char* column = default_if_null(e2->Attribute("column"), "0");
+                    // cppcheck-suppress templateInstantiation - TODO: fix this - see #11631
+                    decls[functionName] = Location(file ? file : filesTxtInfo.sourceFile, strToInt<int>(lineNumber), strToInt<int>(column));
                 }
             }
         }
-    }
+    };
+
+    AnalyzerInformation::processFilesTxt(buildDir, handler);
 
     for (auto decl = decls.cbegin(); decl != decls.cend(); ++decl) {
         const std::string &functionName = stripTemplateParameters(decl->first);
diff --git a/lib/cppcheck.cpp b/lib/cppcheck.cpp
index 0fb23203718..c7c6ea65dfc 100644
--- a/lib/cppcheck.cpp
+++ b/lib/cppcheck.cpp
@@ -70,10 +70,11 @@
 #include <vector>
 
 #include "json.h"
-#include "xml.h"
 
 #include <simplecpp.h>
 
+namespace tinyxml2 { class XMLElement; }
+
 static constexpr char Version[] = CPPCHECK_VERSION_STRING;
 static constexpr char ExtraVersion[] = "";
 
@@ -1851,50 +1852,26 @@ unsigned int CppCheck::analyseWholeProgram(const std::string &buildDir, const st
         return mLogger->exitcode();
 
     executeAddonsWholeProgram(files, fileSettings, ctuInfo);
+
     std::list<Check::FileInfo*> fileInfoList;
     CTU::FileInfo ctuFileInfo;
 
-    // Load all analyzer info data..
-    const std::string filesTxt(buildDir + "/files.txt");
-    std::ifstream fin(filesTxt);
-    std::string filesTxtLine;
-    while (std::getline(fin, filesTxtLine)) {
-        AnalyzerInformation::Info filesTxtInfo;
-        if (!filesTxtInfo.parse(filesTxtLine))
-            continue;
-
-        const std::string xmlfile = buildDir + '/' + filesTxtInfo.afile;
-
-        tinyxml2::XMLDocument doc;
-        const tinyxml2::XMLError error = doc.LoadFile(xmlfile.c_str());
-        if (error != tinyxml2::XML_SUCCESS)
-            continue;
-
-        const tinyxml2::XMLElement * const rootNode = doc.FirstChildElement();
-        if (rootNode == nullptr)
-            continue;
-
-        for (const tinyxml2::XMLElement *e = rootNode->FirstChildElement(); e; e = e->NextSiblingElement()) {
-            if (std::strcmp(e->Name(), "FileInfo") != 0)
-                continue;
-            const char *checkClassAttr = e->Attribute("check");
-            if (!checkClassAttr)
-                continue;
-            if (std::strcmp(checkClassAttr, "ctu") == 0) {
-                ctuFileInfo.loadFromXml(e);
-                continue;
-            }
-            // cppcheck-suppress shadowFunction - TODO: fix this
-            for (const Check *check : Check::instances()) {
-                if (checkClassAttr == check->name()) {
-                    if (Check::FileInfo* fi = check->loadFileInfoFromXml(e)) {
-                        fi->file0 = filesTxtInfo.sourceFile;
-                        fileInfoList.push_back(fi);
-                    }
+    const auto handler = [&fileInfoList, &ctuFileInfo](const char* checkattr, const tinyxml2::XMLElement* e, const AnalyzerInformation::Info& filesTxtInfo) {
+        if (std::strcmp(checkattr, "ctu") == 0) {
+            ctuFileInfo.loadFromXml(e);
+            return;
+        }
+        for (const Check *check : Check::instances()) {
+            if (checkattr == check->name()) {
+                if (Check::FileInfo* fi = check->loadFileInfoFromXml(e)) {
+                    fi->file0 = filesTxtInfo.sourceFile;
+                    fileInfoList.push_back(fi);
                 }
             }
         }
-    }
+    };
+
+    AnalyzerInformation::processFilesTxt(buildDir, handler);
 
     // Analyse the tokens
     // cppcheck-suppress shadowFunction - TODO: fix this
diff --git a/lib/ctu.cpp b/lib/ctu.cpp
index 158c8c1e046..df8ee0f74b6 100644
--- a/lib/ctu.cpp
+++ b/lib/ctu.cpp
@@ -231,6 +231,7 @@ bool CTU::FileInfo::NestedCall::loadFromXml(const tinyxml2::XMLElement *xmlEleme
     return !error;
 }
 
+// TODO: bail out on unexpected data
 void CTU::FileInfo::loadFromXml(const tinyxml2::XMLElement *xmlElement)
 {
     for (const tinyxml2::XMLElement *e = xmlElement->FirstChildElement(); e; e = e->NextSiblingElement()) {
diff --git a/oss-fuzz/Makefile b/oss-fuzz/Makefile
index 02d2e7fbde2..ad7fb641024 100644
--- a/oss-fuzz/Makefile
+++ b/oss-fuzz/Makefile
@@ -245,7 +245,7 @@ $(libcppdir)/checktype.o: ../lib/checktype.cpp ../lib/addoninfo.h ../lib/astutil
 $(libcppdir)/checkuninitvar.o: ../lib/checkuninitvar.cpp ../lib/addoninfo.h ../lib/astutils.h ../lib/check.h ../lib/checkers.h ../lib/checknullpointer.h ../lib/checkuninitvar.h ../lib/config.h ../lib/ctu.h ../lib/errorlogger.h ../lib/errortypes.h ../lib/library.h ../lib/mathlib.h ../lib/platform.h ../lib/settings.h ../lib/smallvector.h ../lib/sourcelocation.h ../lib/standards.h ../lib/symboldatabase.h ../lib/templatesimplifier.h ../lib/token.h ../lib/tokenize.h ../lib/tokenlist.h ../lib/utils.h ../lib/vfvalue.h
 	$(CXX) ${LIB_FUZZING_ENGINE} $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $(libcppdir)/checkuninitvar.cpp
 
-$(libcppdir)/checkunusedfunctions.o: ../lib/checkunusedfunctions.cpp ../externals/tinyxml2/tinyxml2.h ../lib/addoninfo.h ../lib/astutils.h ../lib/checkers.h ../lib/checkunusedfunctions.h ../lib/config.h ../lib/errorlogger.h ../lib/errortypes.h ../lib/library.h ../lib/mathlib.h ../lib/path.h ../lib/platform.h ../lib/settings.h ../lib/smallvector.h ../lib/sourcelocation.h ../lib/standards.h ../lib/symboldatabase.h ../lib/templatesimplifier.h ../lib/token.h ../lib/tokenize.h ../lib/tokenlist.h ../lib/utils.h ../lib/vfvalue.h ../lib/xml.h
+$(libcppdir)/checkunusedfunctions.o: ../lib/checkunusedfunctions.cpp ../externals/tinyxml2/tinyxml2.h ../lib/addoninfo.h ../lib/analyzerinfo.h ../lib/astutils.h ../lib/checkers.h ../lib/checkunusedfunctions.h ../lib/config.h ../lib/errorlogger.h ../lib/errortypes.h ../lib/library.h ../lib/mathlib.h ../lib/path.h ../lib/platform.h ../lib/settings.h ../lib/smallvector.h ../lib/sourcelocation.h ../lib/standards.h ../lib/symboldatabase.h ../lib/templatesimplifier.h ../lib/token.h ../lib/tokenize.h ../lib/tokenlist.h ../lib/utils.h ../lib/vfvalue.h ../lib/xml.h
 	$(CXX) ${LIB_FUZZING_ENGINE} $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $(libcppdir)/checkunusedfunctions.cpp
 
 $(libcppdir)/checkunusedvar.o: ../lib/checkunusedvar.cpp ../lib/addoninfo.h ../lib/astutils.h ../lib/check.h ../lib/checkers.h ../lib/checkunusedvar.h ../lib/config.h ../lib/errortypes.h ../lib/fwdanalysis.h ../lib/library.h ../lib/mathlib.h ../lib/platform.h ../lib/settings.h ../lib/smallvector.h ../lib/sourcelocation.h ../lib/standards.h ../lib/symboldatabase.h ../lib/templatesimplifier.h ../lib/token.h ../lib/tokenize.h ../lib/tokenlist.h ../lib/utils.h ../lib/valueflow.h ../lib/vfvalue.h
@@ -260,7 +260,7 @@ $(libcppdir)/clangimport.o: ../lib/clangimport.cpp ../lib/addoninfo.h ../lib/che
 $(libcppdir)/color.o: ../lib/color.cpp ../lib/color.h ../lib/config.h
 	$(CXX) ${LIB_FUZZING_ENGINE} $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $(libcppdir)/color.cpp
 
-$(libcppdir)/cppcheck.o: ../lib/cppcheck.cpp ../externals/picojson/picojson.h ../externals/simplecpp/simplecpp.h ../externals/tinyxml2/tinyxml2.h ../lib/addoninfo.h ../lib/analyzerinfo.h ../lib/check.h ../lib/checkers.h ../lib/checkunusedfunctions.h ../lib/clangimport.h ../lib/color.h ../lib/config.h ../lib/cppcheck.h ../lib/ctu.h ../lib/errorlogger.h ../lib/errortypes.h ../lib/filesettings.h ../lib/json.h ../lib/library.h ../lib/mathlib.h ../lib/path.h ../lib/platform.h ../lib/preprocessor.h ../lib/regex.h ../lib/settings.h ../lib/smallvector.h ../lib/sourcelocation.h ../lib/standards.h ../lib/suppressions.h ../lib/symboldatabase.h ../lib/templatesimplifier.h ../lib/timer.h ../lib/token.h ../lib/tokenize.h ../lib/tokenlist.h ../lib/utils.h ../lib/valueflow.h ../lib/version.h ../lib/vfvalue.h ../lib/xml.h
+$(libcppdir)/cppcheck.o: ../lib/cppcheck.cpp ../externals/picojson/picojson.h ../externals/simplecpp/simplecpp.h ../lib/addoninfo.h ../lib/analyzerinfo.h ../lib/check.h ../lib/checkers.h ../lib/checkunusedfunctions.h ../lib/clangimport.h ../lib/color.h ../lib/config.h ../lib/cppcheck.h ../lib/ctu.h ../lib/errorlogger.h ../lib/errortypes.h ../lib/filesettings.h ../lib/json.h ../lib/library.h ../lib/mathlib.h ../lib/path.h ../lib/platform.h ../lib/preprocessor.h ../lib/regex.h ../lib/settings.h ../lib/smallvector.h ../lib/sourcelocation.h ../lib/standards.h ../lib/suppressions.h ../lib/symboldatabase.h ../lib/templatesimplifier.h ../lib/timer.h ../lib/token.h ../lib/tokenize.h ../lib/tokenlist.h ../lib/utils.h ../lib/valueflow.h ../lib/version.h ../lib/vfvalue.h
 	$(CXX) ${LIB_FUZZING_ENGINE} $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $(libcppdir)/cppcheck.cpp
 
 $(libcppdir)/ctu.o: ../lib/ctu.cpp ../externals/tinyxml2/tinyxml2.h ../lib/astutils.h ../lib/check.h ../lib/config.h ../lib/ctu.h ../lib/errorlogger.h ../lib/errortypes.h ../lib/library.h ../lib/mathlib.h ../lib/path.h ../lib/smallvector.h ../lib/sourcelocation.h ../lib/standards.h ../lib/symboldatabase.h ../lib/templatesimplifier.h ../lib/token.h ../lib/tokenize.h ../lib/tokenlist.h ../lib/utils.h ../lib/vfvalue.h ../lib/xml.h