Backport 1.x - initial backport

.github/actions/benchmark/action.yaml

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+name: Benchmark
+description: benchmark execution
+
+inputs:
+  ref:
+    description: ref to checkout
+  compare:
+    description: results comparison string
+    default: --benchmark-compare=0001 --benchmark-compare-fail=min:25% --benchmark-group-by=fullname --color=yes
+
+runs:
+  using: "composite"
+  steps:
+    - name: Print available disk space
+      shell: bash
+      run: df -h
+
+    - name: Checkout commit which performance should be measured
+      shell: bash
+      run: |
+        git restore .
+        git fetch origin ${{ inputs.ref }} --depth 1
+        git checkout ${{ inputs.ref }}
+
+    - name: Build wheel
+      shell: bash
+      env:
+        CIBW_BUILD_VERBOSITY: 1
+      run: |
+        python -m cibuildwheel --only cp312-manylinux_x86_64 --output-dir ./wheelhouse python/
+
+    - name: Install local wheel
+      shell: bash
+      run: |
+        pip install ./wheelhouse/*.whl
+        rm -f ./wheelhouse/*.whl
+
+    - name: Checkout current commit which contains all tests to run
+      shell: bash
+      run: git checkout ${{ github.sha }}
+
+    # assure that local segyio doesn't take priority (one installed to pip is used)
+    - name: Remove local segyio
+      shell: bash
+      working-directory: python
+      run: |
+        python -c "import segyio; import inspect; print('before: segyio loaded from ' + inspect.getfile(segyio))"
+        rm -rf $(pwd)/segyio
+        python -c "import segyio; import inspect; print('after: segyio loaded from ' + inspect.getfile(segyio))"
+
+    - name: Make segy file
+      shell: bash
+      working-directory: python
+      run: |
+        if [ ! -f file.sgy ]; then
+          time python -m examples.make-file file.sgy 1600 1 1000 1 1200
+        else
+          echo "file.sgy already exists"
+        fi
+
+    - name: Make segy small file
+      shell: bash
+      working-directory: python
+      run: |
+        if [ ! -f file-small.sgy ]; then
+          time python -m examples.make-file file-small.sgy 500 1 350 1 350
+        else
+          echo "file-small.sgy already exists"
+        fi
+
+    - name: Print filesize
+      shell: bash
+      working-directory: python
+      run: |
+        ls -lh file.sgy
+        ls -lh file-small.sgy
+
+    - name: Run benchmark tests
+      shell: bash
+      working-directory: python
+      run: |
+        pytest test/benchmarks.py -rP --benchmark-sort=name --benchmark-autosave ${{ inputs.compare }}
+
+    - name: Remove build artifacts
+      shell: bash
+      run: |
+        git clean -df --exclude=.benchmarks
+        pip uninstall -y segyio

.github/images/bigendian.Dockerfile

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+ARG S390X_BASE_IMAGE=s390x_base
+FROM s390x/debian:stable-slim AS s390x_base
+RUN apt-get update
+RUN apt-get install -y git cmake g++ python3 python3-pip python3-venv python3-numpy
+
+FROM $S390X_BASE_IMAGE AS tester
+WORKDIR /
+COPY . /segyio
+WORKDIR /segyio
+
+RUN python3 -m venv pyvenv --system-site-packages
+RUN /segyio/pyvenv/bin/python -m pip install --upgrade pip
+RUN /segyio/pyvenv/bin/python -m pip install -r python/requirements-dev.txt
+
+WORKDIR /segyio/build
+RUN cmake -DBUILD_SHARED_LIBS=ON -DCMAKE_BUILD_TYPE=Debug -DPython_ROOT_DIR="/segyio/pyvenv/" ..
+RUN make -j4
+RUN ctest --verbose

.github/images/large32-bit.Dockerfile

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+FROM i386/python:3-slim
+RUN apt-get update
+RUN apt-get install -y git cmake g++ libopenblas-dev
+
+WORKDIR /
+COPY . /segyio
+WORKDIR /segyio
+
+RUN pip install --upgrade pip
+RUN pip install -r python/requirements-dev.txt
+
+WORKDIR /segyio/build
+RUN cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_BIN=OFF -DBUILD_TESTING=OFF -DBUILD_PYTHON=ON ..
+RUN make -j4
+
+WORKDIR /segyio/python
+RUN pytest test/large.py -rPV

.github/workflows/analyzers.yaml

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+name: Run analyzers
+permissions: {}
+
+on:
+  push:
+    branches: [segyio-1.x]
+  pull_request:
+    branches: [segyio-1.x]
+  workflow_dispatch:
+
+jobs:
+  cppcheck:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo DEBIAN_FRONTEND=noninteractive apt-get -y install cppcheck
+
+      - name: Configure
+        run: |
+          cmake -S . -B build                     \
+            -DCMAKE_EXPORT_COMPILE_COMMANDS=ON    \
+            -DBUILD_PYTHON=OFF                    \
+            -DBUILD_TESTING=OFF
+
+      - name: Run cppcheck
+        run: |
+          cppcheck                                          \
+            --enable=style,portability,performance,warning  \
+            --library=posix                                 \
+            --library=cppcheck/segyio.cfg                   \
+            --suppressions-list=cppcheck/suppressions.txt   \
+            --inline-suppr                                  \
+            --project=build/compile_commands.json           \
+            --error-exitcode=1
+
+  scan_build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo DEBIAN_FRONTEND=noninteractive apt-get -y install clang clang-tools libfindbin-libs-perl
+
+      - name: Configure segyio
+        run: |
+          scan-build --status-bugs   \
+            cmake                    \
+            -S .                     \
+            -B build                 \
+            -DCMAKE_BUILD_TYPE=Debug \
+            -DBUILD_PYTHON=OFF       \
+            -DBUILD_TESTING=OFF
+
+      - name: Run scan-build
+        run: |
+          scan-build --status-bugs \
+            cmake                  \
+            --build build
+
+  valgrind:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo DEBIAN_FRONTEND=noninteractive apt-get -y install valgrind
+
+      - name: Build segyio
+        run: |
+            cmake -S . -B build           \
+            -DCMAKE_BUILD_TYPE=Debug      \
+            -DCMAKE_C_FLAGS_DEBUG="-O0"   \
+            -DCMAKE_CXX_FLAGS_DEBUG="-O0" \
+            -DBUILD_SHARED_LIBS=ON        \
+            -DBUILD_PYTHON=OFF
+            cmake --build build
+
+      - name: Run valgrind on C tests, file
+        working-directory: build/lib
+        run: |
+          valgrind --leak-check=full --show-leak-kinds=all --error-exitcode=1 ./c.segy "[c.segy]"
+
+      - name: Run valgrind on C tests, mmap
+        working-directory: build/lib
+        run: |
+          valgrind --leak-check=full --show-leak-kinds=all --error-exitcode=1 ./c.segy "[c.segy]" "--test-mmap"
+
+      - name: Run valgrind on C++ tests
+        working-directory: build/lib
+        run: |
+          valgrind --leak-check=full --show-leak-kinds=all --error-exitcode=1 ./c.segy "[c++]"

.github/workflows/benchmarks.yaml

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+name: Benchmarks
+permissions: {}
+
+on:
+  push:
+    branches: [segyio-1.x]
+  pull_request:
+    branches: [segyio-1.x]
+  workflow_dispatch:
+    inputs:
+      commit_ref:
+        description: "optional: compare to specific ref"
+        required: false
+
+jobs:
+  benchmarks:
+    name: Benchmark scripts
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install cibuildwheel
+        # old ref is incompatible with cmake 4.0.0, which is used in cbuildwheel > 2.23.2
+        # once default ref is updated, restriction can be removed
+        run: python3 -m pip install cibuildwheel==2.23.2
+
+      - name: Install build/test dependencies
+        working-directory: python
+        run: |
+          python3 -m pip install -r requirements-dev.txt
+
+      - name: Set default benchmark reference
+        run: echo "BENCHMARK_REF=142e45a2b941a1b603723c38882b193db1c1d968" >> $GITHUB_ENV
+
+      - name: Set benchmark reference if defined by workflow_dispatch
+        if: github.event.inputs.commit_ref != ''
+        run: echo "BENCHMARK_REF=${{ github.event.inputs.commit_ref }}" >> $GITHUB_ENV
+
+      - name: Benchmark old commit
+        uses: "./.github/actions/benchmark"
+        with:
+          ref: ${{ env.BENCHMARK_REF }}
+          compare: ""
+
+      # Head of repository is incompatible with cibuildwheel < 3.0.0 due to
+      # using the "test-sources" feature in pyproject.toml
+      - name: Update cibuildwheel for new commit
+        run: python3 -m pip install --upgrade cibuildwheel
+
+      - name: Benchmark current commit and compare
+        uses: "./.github/actions/benchmark"
+        with:
+          ref: ${{ github.sha }}