.

Reviewed-on: http://ivt5wiimhwpo56td6eodn2n3fduug3bglqvqewbk2jnyl4hcimea.b32.i2p/git/git/Larra/larra/pulls/22

.devcontainer/Dockerfile

@@ -3,13 +3,13 @@
 # Url: https://hub.docker.com/layers/library/archlinux/latest/images/sha256-a10e51dd0694d6c4142754e9d06cbce7baf91ace8031a30df37064d1091ab414?context=explore
 FROM archlinux@sha256:a10e51dd0694d6c4142754e9d06cbce7baf91ace8031a30df37064d1091ab414
 
-# Update the package database and install clang
+# Update the package database
 #    1. system tools
 #    2. build/test tools
 #    3. libraries
 RUN pacman -Syyu --noconfirm \
-    && pacman -Syyu --noconfirm git less vim sudo base-devel python-pip \
-    && pacman -Syyu --noconfirm clang cmake make ninja meson shellcheck \
+    && pacman -Syyu --noconfirm git less vim sudo python-pip wget which pkgconf \
+    && pacman -Syyu --noconfirm cmake make gcc ninja meson shellcheck \
     && pacman -Syyu --noconfirm gtk4 gtkmm-4.0 boost spdlog fmt libxml++-5.0
 
 # Create a non-root user 'dev'
@@ -21,10 +21,49 @@ RUN useradd -ms /bin/bash dev \
 COPY --from=library/docker:latest /usr/local/bin/docker /usr/bin/docker
 COPY --from=docker/compose:latest /usr/local/bin/docker-compose /usr/bin/docker-compose
 
+# Allow dev to execute docker without sudo
 RUN groupadd docker &&\
     usermod -aG docker dev &&\
     newgrp docker
 
+# Switch to the 'dev' user
+USER dev
+
+# Add cached layer with the latest LLVM-${LLVM_VER}
+ARG LLVM_VER=19.1.1
+ENV LLVM_VER=${LLVM_VER}
+RUN sudo mkdir -p /home/artifacts
+ADD https://github.com/llvm/llvm-project/releases/download/llvmorg-${LLVM_VER}/LLVM-${LLVM_VER}-Linux-X64.tar.xz /home/artifacts/
+
+# Create the LLVM directory and extract only binaries into it
+RUN sudo mkdir -p /home/LLVM-${LLVM_VER}
+RUN sudo tar -xJf /home/artifacts/LLVM-${LLVM_VER}-Linux-X64.tar.xz -C /home/LLVM-${LLVM_VER} --strip-components=1 \
+    LLVM-${LLVM_VER}-Linux-X64/bin/clang-19                 \
+    LLVM-${LLVM_VER}-Linux-X64/bin/clang                    \
+    LLVM-${LLVM_VER}-Linux-X64/bin/clang++                  \
+    LLVM-${LLVM_VER}-Linux-X64/bin/lld                      \
+    LLVM-${LLVM_VER}-Linux-X64/bin/ld.lld                   \
+    LLVM-${LLVM_VER}-Linux-X64/bin/ld64.lld                 \
+    LLVM-${LLVM_VER}-Linux-X64/bin/clang-scan-deps          \
+    LLVM-${LLVM_VER}-Linux-X64/bin/llvm-symbolizer          \
+    LLVM-${LLVM_VER}-Linux-X64/bin/clang-format             \
+    LLVM-${LLVM_VER}-Linux-X64/bin/clang-tidy               \
+    LLVM-${LLVM_VER}-Linux-X64/bin/clang-apply-replacements \
+    LLVM-${LLVM_VER}-Linux-X64/include/                     \
+    LLVM-${LLVM_VER}-Linux-X64/lib/                         \
+    LLVM-${LLVM_VER}-Linux-X64/libexec/                     \
+    LLVM-${LLVM_VER}-Linux-X64/local/                       \
+    LLVM-${LLVM_VER}-Linux-X64/share/
+
+# Add /home/LLVM-${LLVM_VER}/bin to the PATH environment variable
+ENV PATH="/home/LLVM-${LLVM_VER}/bin:${PATH}"
+
+# Add extra tools
+RUN sudo mkdir -p /home/tools
+ADD https://raw.githubusercontent.com/llvm/llvm-project/refs/heads/main/clang-tools-extra/clang-tidy/tool/run-clang-tidy.py /home/tools/
+RUN sudo chmod -R a+x /home/tools/
+RUN sudo chown -R dev /home/tools/
+
 # Add the custom bash prompt with branch info
 RUN printf '\n\
 function modify_prompt { \n\
@@ -37,9 +76,6 @@ function modify_prompt { \n\
 } \n\
 modify_prompt\n' >> /home/dev/.bashrc
 
-# Switch to the 'dev' user
-USER dev
-
 RUN git config --global core.editor vim
 
 # Set the default working directory

.devcontainer/post_create_config.sh

@@ -1,4 +1,7 @@
-sleep 1
+sleep 5
+
+sudo chmod -R a+x /home/tools/
+sudo chown -R dev /home/tools/
 
 # Check that ejabberd server started successfully
 red='\e[1;31m'

.forgejo/workflows/pr_check.yaml

@@ -0,0 +1,188 @@
+name: PR Check
+run-name: ${{ github.actor }} is testing
+on: [push]
+jobs:
+  on-push-commit-check:
+    runs-on: archlinux-latest
+    steps:
+      - name: Setup environment - Install pacman packages
+        shell: sh
+        run: |
+          pacman -Syyu --noconfirm
+          pacman -S --noconfirm git less vim sudo python-pip wget which pkgconf nodejs-lts-iron
+          pacman -S --noconfirm cmake make gcc ninja meson
+          pacman -S --noconfirm gtk4 gtkmm-4.0 boost spdlog fmt libxml++-5.0 gtest
+
+      - name: Setup environment - Install LLVM-19.1.1
+        run: |
+          export LLVM_VER=19.1.1
+
+          echo "::group::Download LLVM-${LLVM_VER}"
+          wget https://github.com/llvm/llvm-project/releases/download/llvmorg-${LLVM_VER}/LLVM-${LLVM_VER}-Linux-X64.tar.xz -O /LLVM-${LLVM_VER}-Linux-X64.tar.xz
+          echo "::endgroup::"
+
+          echo "::group::Extracting LLVM-${LLVM_VER}"
+          mkdir -p /home/LLVM-${LLVM_VER}/
+          tar -xf /LLVM-${LLVM_VER}-Linux-X64.tar.xz -C "/home/LLVM-${LLVM_VER}/" --strip-components=1 \
+            LLVM-${LLVM_VER}-Linux-X64/bin/clang-19        \
+            LLVM-${LLVM_VER}-Linux-X64/bin/clang           \
+            LLVM-${LLVM_VER}-Linux-X64/bin/clang++         \
+            LLVM-${LLVM_VER}-Linux-X64/bin/clang-scan-deps \
+            LLVM-${LLVM_VER}-Linux-X64/bin/llvm-symbolizer \
+            LLVM-${LLVM_VER}-Linux-X64/bin/clang-format    \
+            LLVM-${LLVM_VER}-Linux-X64/bin/clang-tidy      \
+            LLVM-${LLVM_VER}-Linux-X64/include/            \
+            LLVM-${LLVM_VER}-Linux-X64/lib/                \
+            LLVM-${LLVM_VER}-Linux-X64/libexec/            \
+            LLVM-${LLVM_VER}-Linux-X64/local/              \
+            LLVM-${LLVM_VER}-Linux-X64/share/
+
+          rm /LLVM-${LLVM_VER}-Linux-X64.tar.xz
+          echo "::endgroup::"
+
+          echo "LLVM version ${LLVM_VER}"
+          echo "Available LLVM binaries:"
+          ls -la /home/LLVM-${LLVM_VER}/bin/
+
+      - name: List CI environment variables
+        run: |
+          echo "Runner OS: ${{ runner.os }}"
+          echo "Job triggered event: ${{ github.event_name }}"
+          echo "Repository name: ${{ github.repository }}"
+          echo "Workspace path: ${{ github.workspace }}"
+          echo "Actor: ${{ github.actor }}"
+          echo "Ref: ${{ github.ref }}"
+          echo "Ref name: ${{ github.ref_name }}"
+          echo "SHA: ${{ github.sha }}"
+          echo "PATH: ${PATH}"
+
+      - name: Check out repository code
+        run: |
+          export GIT_TERMINAL_PROMPT=0
+          mkdir -p ${{ github.workspace }}
+          cd ${{ github.workspace }}
+
+          echo "Configure project settings and remote credentials"
+          git init
+          git config credential.helper store 
+          git remote add origin https://${{ github.token }}@sha512sum.xyz/git/Larra/larra
+
+          echo "Fetch repo state on pushed commit"
+          git -c protocol.version=2 fetch --no-tags --prune --no-recurse-submodules --depth=1 origin +${{ github.sha }}:${{ github.ref }}
+
+          echo "Checkout to fetched repo state"
+          git checkout ${{ github.ref }}
+
+      - name: Show repo content
+        run: |
+          echo "github.workspace content"
+          ls -la ${{ github.workspace }}
+          echo "This job's status is ${{ job.status }}."
+
+      - name: Store list of repo files
+        run: |
+          cd ${{ github.workspace }}
+          find -type f \( -name "*.h" -o -name "*.hpp" -o -name "*.c" -o -name "*.cpp" \) > repo_files_to_check.txt
+          find -type f \( -name "*.c" -o -name "*.cpp" \) > repo_sources_to_check.txt
+
+      #- name: Delete cache
+      #  run: |
+      #    rm -rf ${{ runner.tool_cache }}/cache-llvm-19-restore
+      #
+      #- name: Try restore LLVM-19 binaries from cache
+      #  id: cache-llvm-19-bins-restore
+      #  uses: actions/cache@v4
+      #  with:
+      #    path: /LLVM-${LLVM_VER}-Linux-X64-small.tar.xz
+      #    key: LLVM-${LLVM_VER}-Linux-X64-small
+      #
+      #- name: Save LLVM-19 to cache
+      #  if: steps.cache-llvm-19-bins-restore.outputs.cache-hit != 'true'
+      #  id: cache-llvm-19-save
+      #  uses: actions/cache/save@v4
+      #  with:
+      #    path: /LLVM-${LLVM_VER}-Linux-X64-small.tar.xz
+      #    key: LLVM-${LLVM_VER}-Linux-X64-small
+
+      - name: Check clang-format
+        run: |
+          export LLVM_VER=19.1.1
+          export PATH="/home/LLVM-${LLVM_VER}/bin:${PATH}"
+          cd ${{ github.workspace }}
+          export REPO_FILES=$(cat repo_files_to_check.txt)
+
+          printf "\nList of files to be checked:\n"
+          echo "::group::files to be checked"
+          for FILE in $REPO_FILES; do printf "\t ${{ github.workspace }}/$FILE \n"; done
+          echo "::endgroup::"
+
+          for FILE in $REPO_FILES; do clang-format -i ${{ github.workspace }}/$FILE --dry-run --Werror; done
+          echo "No clang-format violations detected!"
+
+      - name: GCC build
+        run: |
+          mkdir -p ${{ github.workspace }}/build_gcc
+          cmake -Wno-dev \
+            -DCMAKE_C_COMPILER=gcc               \
+            -DCMAKE_CXX_COMPILER=g++             \
+            -S ${{ github.workspace }}           \
+            -B ${{ github.workspace }}/build_gcc \
+            -GNinja -DCMAKE_BUILD_TYPE=Release   \
+            -DENABLE_EXAMPLES=ON                 \
+            -DENABLE_TESTS=ON
+          cmake --build ${{ github.workspace }}/build_gcc --parallel `nproc`
+
+      - name: GCC unit tests
+        run: |
+          cd ${{ github.workspace }}/build_gcc
+          ./larra_xmpp_tests
+
+      - name: Check clang-tidy
+        run: |
+          export LLVM_VER=19.1.1
+          export PATH="/home/LLVM-${LLVM_VER}/bin:${PATH}"
+          cd ${{ github.workspace }}
+
+          sed -i 's|/usr/sbin/g++|/home/LLVM-19.1.1/bin/clang++ -stdlib=libc++ -I/home/LLVM-${LLVM_VER}/include/c++/v1|' build_gcc/compile_commands.json
+          sed -i 's|-fdeps-format=p1689r5||' build_gcc/compile_commands.json
+          sed -i 's|-fmodules-ts||' build_gcc/compile_commands.json
+          sed -i 's|-fmodule-mapper=.*\.modmap||' build_gcc/compile_commands.json
+
+          wget https://raw.githubusercontent.com/llvm/llvm-project/refs/heads/main/clang-tools-extra/clang-tidy/tool/run-clang-tidy.py
+          python run-clang-tidy.py                           \
+            -warnings-as-errors=*                            \
+            -use-color                                       \
+            -exclude-header-filter .*build.*                 \
+            -header-filter .hpp                              \
+            -p ${{ github.workspace }}/build_gcc/            \
+            -config-file ${{ github.workspace }}/.clang-tidy \
+            \
+            ${{ github.workspace }}/examples \
+            ${{ github.workspace }}/library/ \
+            ${{ github.workspace }}/src/
+
+          echo "No clang-tidy violations detected!"
+
+      #- name: Clang build with -fsanitize=address
+      #  run: |
+      #    export LLVM_VER=19.1.1
+      #    export PATH="/home/LLVM-${LLVM_VER}/bin:${PATH}"
+      #    mkdir -p ${{ github.workspace }}/build_clang
+      #    cmake -Wno-dev                           \
+      #      -DCMAKE_C_COMPILER=clang               \
+      #      -DCMAKE_CXX_COMPILER=clang++           \
+      #      -S ${{ github.workspace }}             \
+      #      -B ${{ github.workspace }}/build_clang \
+      #      -GNinja -DCMAKE_BUILD_TYPE=Release     \
+      #      -DENABLE_EXAMPLES=ON                   \
+      #      -DENABLE_TESTS=ON                      \
+      #      -DCMAKE_CXX_FLAGS="-stdlib=libc++ -I/home/LLVM-${LLVM_VER}/include/c++/v1 -fno-omit-frame-pointer -g -fsanitize=address,undefined,leak,function,nullability,vptr" \
+      #      -DCMAKE_EXE_LINKER_FLAGS="-L/home/LLVM-${LLVM_VER}/lib/ -Wl,-rpath,/home/LLVM-${LLVM_VER}/lib -lc++ -lc++abi -lm -lc -lgcc_s -lgcc -fno-omit-frame-pointer -g  -fsanitize=address,undefined,leak,function,nullability,vptr"
+      #    cmake --build ${{ github.workspace }}/build_clang --parallel `nproc`
+      
+      #- name: Clang unit tests with -fsanitize=address
+      #  run: |
+      #    export LLVM_VER=19.1.1
+      #    export PATH="/home/LLVM-${LLVM_VER}/bin:${PATH}"
+      #    cd ${{ github.workspace }}/build_clang
+      #    ASAN_SYMBOLIZER_PATH=llvm-symbolizer ASAN_OPTIONS=detect_stack_use_after_return=1:check_initialization_order=1:detect_leaks=1:atexit=1:abort_on_error=1 ./larra_xmpp_tests

.gitignore

@@ -29,5 +29,4 @@ ext/
 libxmlplusplus-prefix/
 spdlog.pc
 build*
-larra
 temp*

.vscode/launch.json

@@ -11,7 +11,7 @@
             "program": "${workspaceFolder}/build/examples/output/connect",
             "args": [],
             "cwd": "${workspaceFolder}",
-            "preLaunchTask": "Build Debug GCC"
+            "preLaunchTask": "GCC: Build"
         }
     ]
 }

.vscode/tasks.json

@@ -3,6 +3,45 @@
     // for the documentation about the tasks.json format
     "version": "2.0.0",
     "tasks": [
+        //
+        // Checkers/Analyzers tasks
+        //
+        {
+            "label": "Checker: clang-format dry-run",
+            "type": "shell",
+            "command": "for FILE in $(find . -type f \\( -name '*.c' -o -name '*.cpp' -o -name '*.h' -o -name '*.hpp' \\) ! -path '*build*'); do clang-format -i $FILE --dry-run --Werror; done"
+        },
+        {
+            "label": "Checker: clang-format fix errors",
+            "type": "shell",
+            "command": "for FILE in $(find . -type f \\( -name '*.c' -o -name '*.cpp' -o -name '*.h' -o -name '*.hpp' \\) ! -path '*build*'); do clang-format -i $FILE --Werror; done"
+        },
+        {
+            // https://clang.llvm.org/extra/clang-tidy/
+            "label": "Checker: clang-tidy dry-run",
+            "type": "shell",
+            "command": [
+                "python /home/tools/run-clang-tidy.py -exclude-header-filter .*build.* -use-color -warnings-as-errors=* -header-filter .hpp -p ${workspaceFolder}/build_clang/ -config-file ${workspaceFolder}/.clang-tidy",
+                "   ${workspaceFolder}/examples",
+                "   ${workspaceFolder}/library/",
+                "   ${workspaceFolder}/src/"
+            ]
+        },
+        {
+            // https://clang.llvm.org/extra/clang-tidy/
+            "label": "Checker: clang-tidy fix errors",
+            "type": "shell",
+            "command": [
+                "python /home/tools/run-clang-tidy.py -exclude-header-filter .*build.* -use-color -warnings-as-errors=* -header-filter .hpp -p ${workspaceFolder}/build_clang/ -config-file ${workspaceFolder}/.clang-tidy",
+                "   -fix",
+                "   ${workspaceFolder}/examples",
+                "   ${workspaceFolder}/library/",
+                "   ${workspaceFolder}/src/"
+            ]
+        },
+        //
+        // Ejabberd tasks
+        //
         {
             "label": "Ejabberd: show logs",
             "type": "shell",
@@ -11,54 +50,243 @@
             ]
         },
         {
-            "label": "Ejabberd: open shell",
+            "label": "Ejabberd: show localhost registered users",
             "type": "shell",
             "command": [
-                "sudo docker exec -it ejabberd sh"
+                "sudo docker exec -it ejabberd ejabberdctl registered_users localhost"
             ]
         },
         {
-            "label": "Build Debug GCC",
+            "label": "Ejabberd: open shell",
+            "type": "shell",
+            "command": [
+                "printf 'Example cmd: ejabberdctl registered_users localhost\n\n';",
+                "sudo docker exec -it ejabberd sh"
+            ]
+        },
+        //
+        // GCC build related tasks
+        //
+        {
+            "label": "GCC: Clean build folder",
+            "type": "shell",
+            "command": "if [ -n \"$(ls -A ${workspaceFolder}/build)\" ]; then rm -rf ${workspaceFolder}/build/*; fi",
+            "hide": true
+        },
+        {
+            "label": "GCC: Configure Debug",
             "type": "shell",
             "command": [
                 "cd ${workspaceFolder} &&",
                 "mkdir -p build && cd build &&",
-                "cmake -Wno-dev -DCMAKE_BUILD_TYPE=Debug -DENABLE_EXAMPLES=ON -DENABLE_TESTS=ON .. &&",
-                "cmake --build . --parallel `nproc`",
-                "|| ( printf '\n\n\t\\e[31mERROR: Build failed!\\e[0m\n\n\n' && exit 1 )"
+                "cmake cmake -Wno-dev ",
+                "   -DCMAKE_BUILD_TYPE=Debug -DENABLE_EXAMPLES=ON -DENABLE_TESTS=ON .."
             ],
             "options": {
-                "env": {}
+                "env": {
+                    "CC": "/usr/sbin/gcc",
+                    "CXX": "/usr/sbin/g++"
+                }
             },
             "presentation": {
                 "clear": true
             },
-            "problemMatcher": [],
+            "hide": true
+        },
+        {
+            "label": "GCC: Build",
+            "type": "shell",
+            "command": [
+                "cd ${workspaceFolder}/build &&",
+                "cmake --build . --parallel `nproc`",
+                "|| ( printf '\n\n\t\\e[31mERROR: Build failed!\\e[0m\n\n\n' && exit 1 )"
+            ],
+            "presentation": {
+                "clear": true
+            },
+            "hide": true,
+            "group": {
+                "kind": "build"
+            }
+        },
+        {
+            "label": "GCC: Configure and build Debug",
+            "type": "shell",
+            "command": "echo Finished!",
+            "presentation": {
+                "clear": true
+            },
+            "dependsOrder": "sequence",
+            "dependsOn":[
+                "GCC: Clean build folder",
+                "GCC: Configure Debug",
+                "GCC: Build"
+            ],
             "group": {
                 "kind": "build",
                 "isDefault": true
             }
         },
+        //
+        // Clang build related tasks
+        //
         {
-            "label": "Build Debug Clang",
+            "label": "Clang: Configure Debug",
             "type": "shell",
             "command": [
                 "cd ${workspaceFolder} &&",
                 "mkdir -p build_clang && cd build_clang &&",
-                "cmake -Wno-dev -DCMAKE_BUILD_TYPE=Debug -DENABLE_EXAMPLES=ON -DENABLE_TESTS=ON .. &&",
-                "cmake --build . --parallel `nproc`",
-                "|| ( printf '\n\n\t\\e[31mERROR: Build failed!\\e[0m\n\n\n' && exit 1 )"
+                "cmake -Wno-dev ",
+                "   -DCMAKE_BUILD_TYPE=Debug -DENABLE_EXAMPLES=ON -DENABLE_TESTS=ON ",
+                "   -DCMAKE_CXX_FLAGS=\"-stdlib=libstdc++\"",
+                "   -DCMAKE_EXE_LINKER_FLAGS=\"-L/usr/lib/x86_64-linux-gnu -lstdc++\" .."
             ],
             "options": {
                 "env": {
-                    "CC": "/usr/sbin/clang",
-                    "CXX": "/usr/sbin/clang++"
+                    "CC": "clang",
+                    "CXX": "clang++"
                 }
             },
             "presentation": {
                 "clear": true
             },
-            "problemMatcher": []
+            "hide": true
+        },
+        {
+            "label": "Clang: Configure Debug with -fsanitize=address",
+            "type": "shell",
+            "command": [
+                "cd ${workspaceFolder} &&",
+                "mkdir -p build_clang && cd build_clang &&",
+                "cmake -Wno-dev ",
+                "   -DCMAKE_BUILD_TYPE=Debug -DENABLE_EXAMPLES=ON -DENABLE_TESTS=ON",
+                //
+                // Uncomment for GCC standart library: libstdc++
+                //"   -DCMAKE_CXX_FLAGS=\"-stdlib=libstdc++ -fno-omit-frame-pointer -g -fsanitize=address,undefined,leak,function,nullability,vptr\"",
+                //"   -DCMAKE_EXE_LINKER_FLAGS=\"-L/usr/lib/x86_64-linux-gnu -lstdc++ -fno-omit-frame-pointer -g -fsanitize=address,undefined,leak,function,nullability,vptr\"",
+                //
+                "   -DCMAKE_CXX_FLAGS=\"-stdlib=libc++ -I/home/LLVM-19.1.1/include/c++/v1 -fno-omit-frame-pointer -g -fsanitize=address,undefined,leak,function,nullability,vptr\"",
+                "   -DCMAKE_EXE_LINKER_FLAGS=\"-L/home/LLVM-19.1.1/lib/ -Wl,-rpath,/home/LLVM-19.1.1/lib -lc++ -lc++abi -lm -lc -lgcc_s -lgcc -fuse-ld=lld -fno-omit-frame-pointer -g -fsanitize=address,undefined,leak,function,nullability,vptr\"",
+                "   .."
+            ],
+            "options": {
+                "env": {
+                    "CC": "clang",
+                    "CXX": "clang++"
+                }
+            },
+            "presentation": {
+                "clear": true
+            },
+            "hide": true
+        },
+        {
+            //
+            // Useful links:
+            //  - https://github.com/google/sanitizers/wiki/addresssanitizerflags
+            //  - https://clang.llvm.org/docs/AddressSanitizer.html
+            //
+            "label": "Clang: Exec gtest with -fsanitize=address",
+            "type": "shell",
+            "command": [
+                "cd ${workspaceFolder} &&",
+                "mkdir -p build_clang && cd build_clang &&",
+                "ASAN_SYMBOLIZER_PATH=llvm-symbolizer ASAN_OPTIONS=detect_stack_use_after_return=1:check_initialization_order=1:detect_leaks=1:atexit=1:abort_on_error=1 ./larra_xmpp_tests ; echo \"exit code: $?\"",
+            ],
+            "presentation": {
+                "clear": true
+            },
+            "dependsOrder": "sequence",
+            "dependsOn":[
+                "Clang: Clean build folder",
+                "Clang: Configure Debug with -fsanitize=address",
+                "Clang: Build"
+            ]
+        },
+        {
+            "label": "Clang: Configure Debug with -fsanitize=memory",
+            "type": "shell",
+            "command": [
+                "cd ${workspaceFolder} &&",
+                "mkdir -p build_clang && cd build_clang &&",
+                "cmake -Wno-dev ",
+                "   -DCMAKE_BUILD_TYPE=Debug -DENABLE_EXAMPLES=ON -DENABLE_TESTS=ON ",
+                "   -DCMAKE_CXX_FLAGS=\"-stdlib=libstdc++ -fsanitize-memory-track-origins=2 -fno-omit-frame-pointer -fno-optimize-sibling-calls -g -fsanitize=memory\"",
+                "   -DCMAKE_EXE_LINKER_FLAGS=\"-L/usr/lib/x86_64-linux-gnu -lstdc++ -fsanitize-memory-track-origins=2 -fno-omit-frame-pointer -fno-optimize-sibling-calls -g -fsanitize=memory\" ..",
+            ],
+            "options": {
+                "env": {
+                    "CC": "clang",
+                    "CXX": "clang++"
+                }
+            },
+            "presentation": {
+                "clear": true
+            },
+            "hide": true
+        },
+        {
+            //
+            // Useful links:
+            //  - https://github.com/google/sanitizers/wiki/MemorySanitizer
+            //  - https://clang.llvm.org/docs/MemorySanitizer.html
+            //
+            "label": "Clang: Exec gtest with -fsanitize=memory",
+            "type": "shell",
+            "command": [
+                "cd ${workspaceFolder} &&",
+                "mkdir -p build_clang && cd build_clang &&",
+                "MSAN_SYMBOLIZER_PATH=llvm-symbolizer MSAN_OPTIONS=abort_on_error=1 ./larra_xmpp_tests ; echo \"exit code: $?\"",
+            ],
+            "presentation": {
+                "clear": true
+            },
+            "dependsOrder": "sequence",
+            "dependsOn":[
+                "Clang: Clean build folder",
+                "Clang: Configure Debug with -fsanitize=memory",
+                "Clang: Build"
+            ]
+        },
+        {
+            "label": "Clang: Build",
+            "type": "shell",
+            "command": [
+                "cd ${workspaceFolder}/build_clang &&",
+                "cmake --build . --parallel `nproc`",
+                "|| ( printf '\n\n\t\\e[31mERROR: Build failed!\\e[0m\n\n\n' && exit 1 )"
+            ],
+            "presentation": {
+                "clear": true
+            },
+            "group": {
+                "kind": "build"
+            },
+            "hide": true
+        },
+        {
+            "label": "Clang: Configure and build Debug",
+            "type": "shell",
+            "command": [
+                "cd ${workspaceFolder} &&",
+                "mkdir -p build_clang && cd build_clang &&",
+                "MSAN_SYMBOLIZER_PATH=llvm-symbolizer MSAN_OPTIONS=abort_on_error=1 ./larra_xmpp_tests ; echo \"exit code: $?\"",
+            ],
+            "presentation": {
+                "clear": true
+            },
+            "dependsOrder": "sequence",
+            "dependsOn":[
+                "Clang: Clean build folder",
+                "Clang: Configure Debug",
+                "Clang: Build"
+            ]
+        },
+        {
+            "label": "Clang: Clean build folder",
+            "type": "shell",
+            "command": "if [ -n \"$(ls -A ${workspaceFolder}/build_clang)\" ]; then rm -rf ${workspaceFolder}/build_clang/*; fi",
+            "hide": true
         }
     ]
 }

CMakeLists.txt

@@ -23,7 +23,7 @@ option(CPM_USE_LOCAL_PACKAGES "Use local packages" ON)
 option(UTEMPL_USE_LOCAL_PACKAGE "Use utempl local package" OFF)
 option(BUILD_EXECUTABLE ON)
 set(UTEMPL_URL
-  "https://helicopter.myftp.org/git/sha512sum/utempl"
+  "https://sha512sum.xyz/git/sha512sum/utempl"
   CACHE STRING "utempl repository URL")
 
 file(GLOB_RECURSE LIB_SOURCES "library/*.*pp")
@@ -59,8 +59,6 @@ CPMAddPackage(
   OPTIONS "BOOST_SKIP_INSTALL_RULES OFF"
 )
 
-
-CPMAddPackage("gh:zeux/pugixml@1.14")
 CPMAddPackage("gh:fmtlib/fmt#10.2.1")
 CPMAddPackage(NAME nameof
   VERSION 0.10.4
@@ -163,8 +161,10 @@ add_library(larra::larra_xmpp ALIAS larra_xmpp)
 
 target_compile_features(larra_xmpp PUBLIC cxx_std_23)
 
-
-target_compile_options(larra_xmpp PUBLIC -Wno-changes-meaning)
+target_compile_options(larra_xmpp PUBLIC 
+    "$<$<CXX_COMPILER_ID:GNU>:-Wno-changes-meaning>" 
+    "$<$<CXX_COMPILER_ID:GNU>:-Wno-non-template-friend>"
+)
 
 target_include_directories(larra_xmpp PUBLIC
   $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/library/include>
@@ -175,14 +175,14 @@ target_include_directories(larra_xmpp PUBLIC
 
 if(TARGET Boost::pfr)
   target_link_libraries(larra_xmpp PUBLIC
-    Boost::asio Boost::serialization utempl::utempl pugixml::pugixml
-    OpenSSL::SSL nameof::nameof
+    Boost::asio Boost::serialization utempl::utempl
+    OpenSSL::SSL nameof::nameof fmt::fmt
     OpenSSL::Crypto spdlog xmlplusplus ${LIBXML2_LIBRARIES})
 else()
   find_package(Boost 1.85.0 COMPONENTS serialization REQUIRED)
   target_link_libraries(larra_xmpp PUBLIC
-    utempl::utempl ${Boost_LIBRARIES} pugixml::pugixml OpenSSL::SSL
-    nameof::nameof
+    utempl::utempl ${Boost_LIBRARIES} OpenSSL::SSL
+    nameof::nameof fmt::fmt
     OpenSSL::Crypto spdlog xmlplusplus ${LIBXML2_LIBRARIES})
 endif()
 

library/include/larra/client/client.hpp

@@ -74,7 +74,7 @@ struct Client {
 
  private:
   bool active = true;
-  XmlStream<Connection> connection;
+  XmlStream<Connection> connection{};
   BareJid jid;
 };
 

library/include/larra/features.hpp

@@ -3,7 +3,6 @@
 
 #include <larra/utils.hpp>
 #include <optional>
-#include <pugixml.hpp>
 #include <vector>
 
 namespace larra::xmpp {
@@ -11,7 +10,7 @@ namespace larra::xmpp {
 enum class Required : bool { kNotRequired = false, kRequired = true };
 
 struct SaslMechanisms {
-  std::vector<std::string> mechanisms;
+  std::vector<std::string> mechanisms{};
 
   [[nodiscard]] static auto Parse(const xmlpp::Element*) -> SaslMechanisms;
 };
@@ -51,10 +50,9 @@ struct StreamFeatures {
     return utils::FieldSetHelper::With<"saslMechanisms">(std::forward<Self>(self), std::move(value));
   }
   template <typename Self>
-  [[nodiscard]] constexpr auto Others(this Self&& self, std::vector<pugi::xml_node> value) {
+  [[nodiscard]] constexpr auto Others(this Self&& self, std::vector<const xmlpp::Node*> value) {
     return utils::FieldSetHelper::With<"others">(std::forward<Self>(self), std::move(value));
   }
-  [[nodiscard]] static auto Parse(pugi::xml_node) -> StreamFeatures;
   [[nodiscard]] static auto Parse(const xmlpp::Element*) -> StreamFeatures;
 };
 

library/include/larra/printer_stream.hpp

@@ -138,7 +138,7 @@ struct boost::asio::ssl::stream<larra::xmpp::PrintStream<Socket>> : public boost
   auto next_layer() -> next_layer_type& {
     return static_cast<next_layer_type&>(this->Base::next_layer());
   }
-  auto next_layer() const -> const next_layer_type& {
+  [[nodiscard]] auto next_layer() const -> const next_layer_type& {
     return static_cast<const next_layer_type&>(this->Base::next_layer());
   }
 };

library/include/larra/stream.hpp

@@ -2,7 +2,6 @@
 #include <libxml++/libxml++.h>
 
 #include <larra/jid.hpp>
-#include <pugixml.hpp>
 
 namespace larra::xmpp {
 
@@ -19,8 +18,8 @@ struct BasicStream {
   static constexpr auto kAddXmlDecl = true;
   static inline const std::string kDefaultPrefix = "";
   static inline const std::string kDefaultName = "stream:stream";
-  FromType from;
-  ToType to;
+  FromType from{};
+  ToType to{};
   std::optional<std::string> id;
   std::optional<std::string> version;
   std::optional<std::string> xmlLang;
@@ -46,7 +45,8 @@ struct BasicStream {
   }
 
   template <typename Self>
-  [[nodiscard]] constexpr auto XmlLang(this Self&& self, std::optional<std::string> value) -> BasicStream {
+  [[nodiscard]] constexpr auto XmlLang(this Self&& self, std::optional<std::string> value)  // NOLINT(cppcoreguidelines-missing-std-forward)
+      -> BasicStream {
     return utils::FieldSetHelper::With<"xmlLang", BasicStream>(std::forward_like<Self>(self), std::move(value));
   }
 
@@ -57,7 +57,6 @@ struct BasicStream {
     return node;
   }
   friend auto ToString(const BasicStream<JidFrom, JidTo>&) -> std::string;
-  static auto Parse(const pugi::xml_node& node) -> BasicStream<JidFrom, JidTo>;
   [[nodiscard]] static auto Parse(const xmlpp::Element*) -> BasicStream;
 };
 

library/include/larra/stream_error.hpp

@@ -1,7 +1,7 @@
 #pragma once
 #include <libxml++/libxml++.h>
 
-#include <algorithm>
+#include <larra/utils.hpp>
 #include <nameof.hpp>
 #include <ranges>
 #include <variant>
@@ -23,20 +23,18 @@ constexpr auto ToKebabCaseName() -> std::string_view {
   static constexpr auto rawStr = nameof::nameof_short_type<T>();
 
   constexpr auto str = [] {
-    return rawStr | std::views::transform([](auto ch) {
+    return rawStr  //
+           | std::views::transform([](auto ch) {
                return impl::IsUpper(ch) ? std::array<char, 2>{'-', impl::ToLower(ch)} : std::array<char, 2>{ch, '\0'};
-           }) |
-           std::views::join | std::views::filter([](char ch) {
+             })                //
+           | std::views::join  //
+           | std::views::filter([](char ch) {
                return ch != '\0';
-           });
+             })  //
+           | std::views::drop(1);
   };
-  constexpr auto size = std::ranges::distance(str()) - 1;
-  static constexpr auto arr = [&] {
-    std::array<char, size> response;  // NOLINT
-    std::ranges::copy(str() | std::views::drop(1), response.begin());
-    return response;
-  }();
-  return {arr.data(), size};
+  static constexpr auto arr = str() | std::ranges::to<utils::RangeToWrapper<std::array<char, std::ranges::distance(str())>>>();
+  return {arr.data(), arr.size()};
 }
 
 }  // namespace impl
@@ -53,15 +51,11 @@ struct ErrorImpl : BaseError {
   static inline const auto kKebabCaseName = static_cast<std::string>(impl::ToKebabCaseName<T>());
 
   static constexpr auto kErrorMessage = [] -> std::string_view {
+    static constexpr auto name = nameof::nameof_short_type<T>();
     static constexpr auto str = [] {
-      return std::array{std::string_view{"Stream Error: "}, nameof::nameof_short_type<T>(), std::string_view{"\0", 1}} | std::views::join;
+      return std::array{std::string_view{"Stream Error: "}, std::string_view{name}, std::string_view{"\0", 1}} | std::views::join;
     };
-    constexpr auto size = std::ranges::distance(str());
-    static constexpr auto array = [&] {
-      std::array<char, size> response;  // NOLINT
-      std::ranges::copy(str(), response.begin());
-      return response;
-    }();
+    static constexpr auto array = str() | std::ranges::to<utils::RangeToWrapper<std::array<char, std::ranges::distance(str())>>>();
     return {array.data(), array.size() - 1};
   }();
   static constexpr auto TryParse(xmlpp::Element* element) -> std::optional<T> {

library/include/larra/user_account.hpp

@@ -20,7 +20,8 @@ struct PlainUserAccount {
 struct EncryptionUserAccount : PlainUserAccount {
   using PlainUserAccount::PlainUserAccount;
   constexpr EncryptionUserAccount(PlainUserAccount base) : PlainUserAccount{std::move(base)} {};
-  constexpr EncryptionUserAccount(BareJid jid, std::string password) : PlainUserAccount{std::move(jid), std::move(password)} {};
+  constexpr EncryptionUserAccount(BareJid jid, std::string password) :
+      PlainUserAccount{.jid = std::move(jid), .password = std::move(password)} {};
 };
 
 struct EncryptionRequiredUserAccount : EncryptionUserAccount {
@@ -35,7 +36,7 @@ using UserAccountVariant = std::variant<PlainUserAccount, EncryptionUserAccount,
 struct UserAccount : UserAccountVariant {
   using UserAccountVariant::variant;
   template <typename Self>
-  constexpr auto Jid(this Self&& self, BareJid value) -> UserAccount {
+  constexpr auto Jid(this Self&& self, BareJid value) -> UserAccount {  // NOLINT(cppcoreguidelines-missing-std-forward)
     return std::visit<UserAccount>(
         [&](auto& ref) -> std::decay_t<decltype(ref)> {
           return {std::forward_like<Self>(ref).Jid(std::move(value))};
@@ -43,7 +44,7 @@ struct UserAccount : UserAccountVariant {
         self);
   }
   template <typename Self>
-  constexpr auto Password(this Self&& self, std::string value) -> UserAccount {
+  constexpr auto Password(this Self&& self, std::string value) -> UserAccount {  // NOLINT(cppcoreguidelines-missing-std-forward)
     return std::visit<UserAccount>(
         [&](auto& ref) -> std::decay_t<decltype(ref)> {
           return std::forward_like<Self>(ref).Password(std::move(value));
@@ -51,7 +52,7 @@ struct UserAccount : UserAccountVariant {
         self);
   }
   template <typename Self>
-  constexpr auto Jid(this Self&& self) -> decltype(auto) {
+  constexpr auto Jid(this Self&& self) -> decltype(auto) {  // NOLINT(cppcoreguidelines-missing-std-forward)
     return std::visit<decltype(std::forward_like<Self>(std::declval<BareJid&>()))>(
         [](auto& ref) -> decltype(auto) {
           return std::forward_like<Self>(ref.jid);
@@ -59,7 +60,7 @@ struct UserAccount : UserAccountVariant {
         self);
   }
   template <typename Self>
-  constexpr auto Password(this Self&& self) -> decltype(auto) {
+  constexpr auto Password(this Self&& self) -> decltype(auto) {  // NOLINT(cppcoreguidelines-missing-std-forward)
     return std::visit<decltype(std::forward_like<Self>(std::declval<BareJid&>()))>(
         [](auto& ref) -> decltype(auto) {
           return std::forward_like<Self>(ref.password);

library/include/larra/utils.hpp

@@ -83,9 +83,9 @@ struct FieldsDescription {
    * \param value new value for field
    * \return an object of type std::decay_t<Self> with data from T with fields from \ref self and the \ref value of the field \ref ptr
    */
-  template <typename Self, typename Value, typename Type>  // NOLINTNEXTLINE
-  constexpr auto With(Type(T::* ptr), Self&& self, Value&& value) const -> std::decay_t<Self>
-    requires(std::is_constructible_v<T, impl::GetTypeT<Fs>...> && std::constructible_from<std::decay_t<Self>, T> &&
+  template <typename Self, typename Value, typename Type>
+  constexpr auto With(Type(T::* ptr), Self&& self, Value&& value) const  // NOLINT(cppcoreguidelines-missing-std-forward)
+    requires(std::is_constructible_v<T, impl::GetTypeT<Fs>...> && std::is_constructible_v<std::decay_t<Self>, T> &&
              std::is_constructible_v<Type, decltype(value)> && impl::SetConcept<Self, Type, Fs...>)
   {
     return std::decay_t<Self>{utempl::Unpack(this->tuple, [&](auto... fs) -> T {
@@ -267,4 +267,32 @@ inline auto StartLifetimeAs(const void* ptr) -> const T* {
 
 #endif
 
+// Example: "Hello" | std::ranges::to<RangeToWrapper<std::array<char, 6>>>()
+template <typename T>
+struct RangeToWrapper : T {
+  [[nodiscard]] constexpr auto Base() & -> decltype(auto) {
+    return static_cast<T&>(*this);
+  }
+  [[nodiscard]] constexpr auto Base() const& -> decltype(auto) {
+    return static_cast<const T&>(*this);
+  }
+  [[nodiscard]] constexpr auto Base() && -> decltype(auto) {
+    return static_cast<T&&>(*this);
+  }
+  [[nodiscard]] constexpr auto Base() const&& -> decltype(auto) {
+    return static_cast<const T&&>(*this);
+  }
+  template <typename Range>  // NOLINTNEXTLINE
+  constexpr RangeToWrapper(std::from_range_t, Range&& range) {
+    auto result = std::ranges::copy(range, this->begin());
+    if(result.in != std::ranges::end(range) || result.out != std::ranges::end(*this)) {
+      throw std::invalid_argument{"Invalid range size"};
+    }
+  }
+  template <typename... Args>  // NOLINTNEXTLINE
+  constexpr RangeToWrapper(Args&&... args)
+    requires requires { T{std::forward<Args>(args)...}; }
+      : T{std::forward<Args>(args)...} {};
+};
+
 }  // namespace larra::xmpp::utils

library/include/larra/xml_stream.hpp

@@ -52,7 +52,7 @@ class Parser : private xmlpp::SaxParser {
 
   auto ParseChunk(std::string_view str) -> const _xmlError*;
 
-  std::stack<xmlpp::Element*> context;
+  std::stack<xmlpp::Element*> context{};
   xmlpp::Document& doc;
 
  private:
@@ -98,7 +98,7 @@ struct XmlStream : Stream {
     return *this;
   }
 
-  auto next_layer() const -> const Stream& {
+  [[nodiscard]] auto next_layer() const -> const Stream& {
     return *this;
   }
 
@@ -313,7 +313,7 @@ struct XmlStream : Stream {
 
   XmlStream(XmlStream&& other) = default;
 
-  std::unique_ptr<BufferType> streambuf;  // Not movable :(
+  std::unique_ptr<BufferType> streambuf{};  // Not movable :(
 };
 
 }  // namespace larra::xmpp

library/src/encryption.cpp

@@ -53,30 +53,36 @@ struct DataHolder {
 };
 
 consteval auto GetDataForTag(sha512sum::EncryptionTag) {
-  return DataHolder{[] {
+  return DataHolder{.first =
+                        [] {
                           return EVP_sha512();
                         },
-                    kSha512ResultSize,
+                    .second = kSha512ResultSize,
+                    .third =
                         [](auto... args) {
                           return SHA512(args...);
                         }};
 }
 
 consteval auto GetDataForTag(sha256sum::EncryptionTag) {
-  return DataHolder{[] {
+  return DataHolder{.first =
+                        [] {
                           return EVP_sha256();
                         },
-                    kSha256ResultSize,
+                    .second = kSha256ResultSize,
+                    .third =
                         [](auto... args) {
                           return SHA256(args...);
                         }};
 }
 
 consteval auto GetDataForTag(sha1sum::EncryptionTag) {
-  return DataHolder{[] {
+  return DataHolder{.first =
+                        [] {
                           return EVP_sha256();
                         },
-                    kSha1ResultSize,
+                    .second = kSha1ResultSize,
+                    .third =
                         [](auto... args) {
                           return SHA1(args...);
                         }};

library/src/jid.cpp

@@ -4,17 +4,17 @@
 namespace larra::xmpp {
 
 auto ParseBareJid(std::string_view jid, std::size_t at) -> BareJid {
-  return {static_cast<std::string>(jid.substr(0, at)), static_cast<std::string>(jid.substr(at + 1))};
+  return {.username = static_cast<std::string>(jid.substr(0, at)), .server = static_cast<std::string>(jid.substr(at + 1))};
 }
 
 auto ParseBareResourceJid(std::string_view jid, std::size_t slash) -> BareResourceJid {
-  return {static_cast<std::string>(jid.substr(0, slash)), static_cast<std::string>(jid.substr(slash + 1))};
+  return {.server = static_cast<std::string>(jid.substr(0, slash)), .resource = static_cast<std::string>(jid.substr(slash + 1))};
 }
 
 auto ParseFullJid(std::string_view jid, std::size_t at, std::size_t slash) -> FullJid {
-  return {static_cast<std::string>(jid.substr(0, at)),
-          static_cast<std::string>(jid.substr(at + 1, slash - at - 1)),
-          static_cast<std::string>(jid.substr(slash + 1))};
+  return {.username = static_cast<std::string>(jid.substr(0, at)),
+          .server = static_cast<std::string>(jid.substr(at + 1, slash - at - 1)),
+          .resource = static_cast<std::string>(jid.substr(slash + 1))};
 }
 
 auto BareJid::Parse(std::string_view jid) -> BareJid {

library/src/stream.cpp

@@ -3,23 +3,10 @@
 
 namespace {
 
-inline auto ToOptionalString(const pugi::xml_attribute& attribute) -> std::optional<std::string> {
-  return attribute ? std::optional{std::string{attribute.as_string()}} : std::nullopt;
-}
-
 inline auto ToOptionalString(const xmlpp::Attribute* attribute) -> std::optional<std::string> {
   return attribute ? std::optional{std::string{attribute->get_value()}} : std::nullopt;
 }
 
-template <bool IsJid>
-inline auto ToOptionalUser(const pugi::xml_attribute& attribute) {
-  if constexpr(IsJid) {
-    return attribute ? std::optional{larra::xmpp::BareJid::Parse(attribute.as_string())} : std::nullopt;
-  } else {
-    return attribute ? std::optional{std::string{attribute.as_string()}} : std::nullopt;
-  }
-}
-
 template <bool IsJid>
 inline auto ToOptionalUser(const xmlpp::Attribute* attribute) {
   if constexpr(IsJid) {
@@ -61,15 +48,6 @@ template auto ServerStream::SerializeStream(xmlpp::Element* node) const -> void;
 template auto ServerToUserStream::SerializeStream(xmlpp::Element* node) const -> void;
 template auto UserStream::SerializeStream(xmlpp::Element* node) const -> void;
 
-template <bool JidFrom, bool JidTo>
-auto impl::BasicStream<JidFrom, JidTo>::Parse(const pugi::xml_node& node) -> impl::BasicStream<JidFrom, JidTo> {
-  return {ToOptionalUser<JidFrom>(node.attribute("from")),
-          ToOptionalUser<JidTo>(node.attribute("to")),
-          ToOptionalString(node.attribute("id")),
-          ToOptionalString(node.attribute("version")),
-          ToOptionalString(node.attribute("xml:lang"))};
-}
-
 template <bool JidFrom, bool JidTo>
 auto impl::BasicStream<JidFrom, JidTo>::Parse(const xmlpp::Element* node) -> impl::BasicStream<JidFrom, JidTo> {
   return {ToOptionalUser<JidFrom>(node->get_attribute("from")),
@@ -78,12 +56,6 @@ auto impl::BasicStream<JidFrom, JidTo>::Parse(const xmlpp::Element* node) -> imp
           ToOptionalString(node->get_attribute("version")),
           ToOptionalString(node->get_attribute("lang", "xml"))};
 }
-
-template auto UserStream::Parse(const pugi::xml_node& node) -> UserStream;
-
-template auto ServerStream::Parse(const pugi::xml_node& node) -> ServerStream;
-template auto ServerToUserStream::Parse(const pugi::xml_node& node) -> ServerToUserStream;
-
 template auto UserStream::Parse(const xmlpp::Element* node) -> UserStream;
 
 template auto ServerStream::Parse(const xmlpp::Element* node) -> ServerStream;

library/src/xml_stream.cpp

@@ -1,20 +1,23 @@
 #include <libxml/parser.h>
 
-#include <larra/impl/public_cast.hpp>
 #include <larra/utils.hpp>
 #include <larra/xml_stream.hpp>
 #include <ranges>
-#include <span>
+#include <utempl/public_cast.hpp>
 
-namespace larra::xmpp::impl {
+namespace utempl {
 
 template struct PublicCast<&xmlpp::SaxParser::sax_handler_>;
 
+}
+
+namespace larra::xmpp::impl {
+
 auto Parser::ParseChunk(std::string_view str) -> const xmlError* {
   xmlResetLastError();
 
   if(!context_) {
-    this->context_ = xmlCreatePushParserCtxt((this->*GetPrivateMember(static_cast<xmlpp::SaxParser&>(*this))).get(),
+    this->context_ = xmlCreatePushParserCtxt((this->*utempl::GetPrivateMember<"sax_handler_">(static_cast<xmlpp::SaxParser&>(*this))).get(),
                                              nullptr,   // user_data
                                              nullptr,   // chunk
                                              0,         // size