The file /root/traccar-geocoder/builder/CMakeLists.txt has been updated successfully.

add_executable(geocoder-diff tools/geocoder_diff.cpp)
target_link_libraries(geocoder-diff PRIVATE Threads::Threads)
target_include_directories(geocoder-diff PRIVATE tools)

add_executable(geocoder-patch tools/geocoder_patch.cpp)
target_link_libraries(geocoder-patch PRIVATE Threads::Threads)
target_include_directories(geocoder-patch PRIVATE tools)

cmake_minimum_required(VERSION 3.16)
project(traccar-geocoder-build LANGUAGES CXX)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

find_package(Threads REQUIRED)
find_package(ZLIB REQUIRED)
find_package(BZip2 REQUIRED)
find_package(EXPAT REQUIRED)
find_package(s2 QUIET)

add_executable(build-index
    src/build_index.cpp
    src/pbf_reader.cpp
    src/s2_helpers.cpp
    src/ring_assembly.cpp
    src/cache.cpp
    src/continent_filter.cpp
    src/continent_boundaries.cpp
    src/cell_index.cpp
    src/interpolation.cpp
)

# Patch tools (no S2 dependency)
add_executable(geocoder-canonicalize tools/geocoder_canonicalize.cpp)
target_link_libraries(geocoder-canonicalize PRIVATE Threads::Threads)
target_include_directories(geocoder-canonicalize PRIVATE tools)

add_executable(geocoder-diff tools/geocoder_diff.cpp)
target_link_libraries(geocoder-diff PRIVATE zstd Threads::Threads)
target_include_directories(geocoder-diff PRIVATE tools)

add_executable(geocoder-patch tools/geocoder_patch.cpp)
target_link_libraries(geocoder-patch PRIVATE zstd Threads::Threads)
target_include_directories(geocoder-patch PRIVATE tools)

add_executable(remap-test tools/remap_test.cpp)
target_link_libraries(remap-test PRIVATE Threads::Threads)
target_include_directories(remap-test PRIVATE tools)

add_executable(full-remap-test tools/full_remap_test.cpp)
target_link_libraries(full-remap-test PRIVATE Threads::Threads)
target_include_directories(full-remap-test PRIVATE tools)

if(EXISTS /opt/homebrew/include)
    target_include_directories(build-index PRIVATE /opt/homebrew/include)
endif()

if(s2_FOUND)
    target_link_libraries(build-index PRIVATE
        s2::s2
        ZLIB::ZLIB
        BZip2::BZip2
        EXPAT::EXPAT
        Threads::Threads
    )
else()
    target_include_directories(build-index PRIVATE /usr/include/s2)
    target_link_libraries(build-index PRIVATE
        s2
        ZLIB::ZLIB
        BZip2::BZip2
        EXPAT::EXPAT
        Threads::Threads
    )
endif()

-target_link_libraries(geocoder-diff PRIVATE zstd Threads::Threads)

-target_link_libraries(geocoder-patch PRIVATE zstd Threads::Threads)


Bash

cmake -B build . 2>&1 | tail -2 && cmake --build build -j$(nproc) --target geocoder-diff --target geocoder-patch 2>&1 | tail -5

Build CLI-based diff and patch tools


-- Generating done (0.0s)
-- Build files have been written to: /root/traccar-geocoder/builder/build
      |                                                                 getpt
gmake[3]: *** [CMakeFiles/geocoder-diff.dir/build.make:79: CMakeFiles/geocoder-diff.dir/tools/geocoder_diff.cpp.o] Error 1
gmake[2]: *** [CMakeFiles/Makefile2:166: CMakeFiles/geocoder-diff.dir/all] Error 2
gmake[1]: *** [CMakeFiles/Makefile2:173: CMakeFiles/geocoder-diff.dir/rule] Error 2
gmake: *** [Makefile:150: geocoder-diff] Error 2


cmake --build build --target geocoder-diff 2>&1 | grep "error:" | head -3

Show errors


/root/traccar-geocoder/builder/tools/geocoder_diff.cpp:82:65: error: 'getpid' was not declared in this scope; did you mean 'getpt'?


Edit

#include <unistd.h>
#include "patch_format.h"


The file /root/traccar-geocoder/builder/tools/geocoder_diff.cpp has been updated successfully.

// geocoder-diff: Compare two deterministic geocoder builds, produce a .gcpatch.
//
// For each file: apply string remap to old, write temp, run zstd --patch-from.
// Package all per-file zstd patches + remap table into .gcpatch.
//
// Usage: geocoder-diff <old-dir> <new-dir> -o <patch-file>

#include <algorithm>
#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <string>
#include <unordered_map>
#include <vector>

#include "patch_format.h"

// --- String remap ---

static std::unordered_map<uint32_t, uint32_t> build_string_remap(
    const std::vector<char>& old_pool, const std::vector<char>& new_pool)
{
    std::unordered_map<std::string, uint32_t> new_idx;
    size_t pos = 0;
    while (pos < new_pool.size()) {
        const char* s = new_pool.data() + pos;
        size_t len = strlen(s);
        new_idx[std::string(s, len)] = static_cast<uint32_t>(pos);
        pos += len + 1;
    }
    std::unordered_map<uint32_t, uint32_t> remap;
    pos = 0;
    while (pos < old_pool.size()) {
        const char* s = old_pool.data() + pos;
        size_t len = strlen(s);
        auto it = new_idx.find(std::string(s, len));
        if (it != new_idx.end())
            remap[static_cast<uint32_t>(pos)] = it->second;
        pos += len + 1;
    }
    return remap;
}

// --- Remap functions ---

static void remap_addr_points(std::vector<char>& data, const std::unordered_map<uint32_t,uint32_t>& rm) {
    for (size_t i = 0; i + 16 <= data.size(); i += 16) {
        for (size_t off : {8, 12}) {
            uint32_t v; memcpy(&v, data.data() + i + off, 4);
            auto it = rm.find(v);
            if (it != rm.end()) memcpy(data.data() + i + off, &it->second, 4);
        }
    }
}

static void remap_field(std::vector<char>& data, size_t stride, size_t field_off,
                         const std::unordered_map<uint32_t,uint32_t>& rm) {
    for (size_t i = 0; i + stride <= data.size(); i += stride) {
        uint32_t v; memcpy(&v, data.data() + i + field_off, 4);
        auto it = rm.find(v);
        if (it != rm.end()) memcpy(data.data() + i + field_off, &it->second, 4);
    }
}

// --- Write helpers ---
static void write_val(std::ofstream& f, const void* data, size_t size) {
    f.write(reinterpret_cast<const char*>(data), size);
}

int main(int argc, char* argv[]) {
    if (argc < 5 || std::string(argv[3]) != "-o") {
        std::cerr << "Usage: geocoder-diff <old-dir> <new-dir> -o <patch-file>" << std::endl;
        return 1;
    }
    std::string old_dir = argv[1], new_dir = argv[2], patch_path = argv[4];

    // Create temp directory
    std::string tmpdir = "/tmp/geocoder-diff-" + std::to_string(getpid());
    ensure_dir(tmpdir);

    // Load string pools, build remap
    std::cerr << "Building string remap..." << std::endl;
    auto old_strings = read_file(old_dir + "/strings.bin");
    auto new_strings = read_file(new_dir + "/strings.bin");
    auto remap = build_string_remap(old_strings, new_strings);
    std::cerr << "  " << remap.size() << " strings mapped" << std::endl;

    // Detect struct strides
    auto detect_stride = [](const std::string& path, std::vector<size_t> candidates) -> size_t {
        auto data = read_file(path);
        for (size_t s : candidates)
            if (data.size() % s == 0 && data.size() > 0) return s;
        return candidates[0];
    };
    size_t way_stride = detect_stride(old_dir + "/street_ways.bin", {12, 9});
    size_t interp_stride = detect_stride(old_dir + "/interp_ways.bin", {20, 18});
    size_t admin_stride = detect_stride(old_dir + "/admin_polygons.bin", {24, 20, 19});

    // Open patch file
    std::ofstream pf(patch_path, std::ios::binary);
    pf.write(GCPATCH_MAGIC, 8);
    uint32_t ver = GCPATCH_VERSION, flags = 0;
    write_val(pf, &ver, 4);
    write_val(pf, &flags, 4);

    // Section: string remap
    {
        uint32_t marker = 0xFFFFFFFE;
        write_val(pf, &marker, 4);
        // Collect all remap entries (at string start positions)
        std::vector<std::pair<uint32_t,uint32_t>> entries;
        size_t pos = 0;
        while (pos < old_strings.size()) {
            uint32_t old_off = static_cast<uint32_t>(pos);
            auto it = remap.find(old_off);
            uint32_t new_off = (it != remap.end()) ? it->second : 0;
            entries.push_back({old_off, new_off});
            pos += strlen(old_strings.data() + pos) + 1;
        }
        uint32_t count = static_cast<uint32_t>(entries.size());
        write_val(pf, &count, 4);
        for (auto& [o, n] : entries) { write_val(pf, &o, 4); write_val(pf, &n, 4); }
        std::cerr << "  Remap: " << count << " entries" << std::endl;
    }

    // Helper: remap old file, write temp, run zstd --patch-from, package result
    auto diff_file = [&](PatchFileId id, const std::string& name,
                          std::function<void(std::vector<char>&)> remap_fn) {
        std::cerr << "  " << name << ": ";

        std::string old_path = old_dir + "/" + name;
        std::string new_path = new_dir + "/" + name;
        std::string ref_path;

        if (remap_fn) {
            // Remap old file, write to temp
            auto old_data = read_file(old_path);
            remap_fn(old_data);
            ref_path = tmpdir + "/" + name;
            write_file(ref_path, old_data);
        } else {
            ref_path = old_path;
        }

        // Run zstd --patch-from
        std::string zst_path = tmpdir + "/" + name + ".zst";
        std::string cmd = "zstd --patch-from='" + ref_path + "' '" + new_path +
                          "' -o '" + zst_path + "' -f --quiet 2>/dev/null";
        system(cmd.c_str());

        auto zst_data = read_file(zst_path);
        auto new_data = read_file(new_path);
        auto old_data = read_file(old_path);

        // Write section: file_id, encoding, old_size, new_size, delta_size, delta_data
        uint32_t fid = static_cast<uint32_t>(id);
        uint32_t enc = static_cast<uint32_t>(PatchEncoding::COPY_INSERT);
        uint64_t os = old_data.size(), ns = new_data.size(), ds = zst_data.size();
        write_val(pf, &fid, 4);
        write_val(pf, &enc, 4);
        write_val(pf, &os, 8);
        write_val(pf, &ns, 8);
        write_val(pf, &ds, 8);
        pf.write(zst_data.data(), zst_data.size());

        double pct = ns > 0 ? ds * 100.0 / ns : 0;
        std::cerr << ds << " bytes (" << std::fixed << std::setprecision(1)
                  << pct << "% of " << ns / 1024 / 1024 << " MiB)" << std::endl;

        // Clean temp files
        if (remap_fn) remove(ref_path.c_str());
        remove(zst_path.c_str());
    };

    // Diff all files
    size_t ws = way_stride, is = interp_stride, as = admin_stride;
    diff_file(PatchFileId::STRINGS, "strings.bin", {});
    diff_file(PatchFileId::ADDR_POINTS, "addr_points.bin",
        [&](std::vector<char>& d) { remap_addr_points(d, remap); });
    diff_file(PatchFileId::STREET_WAYS, "street_ways.bin",
        [&, ws](std::vector<char>& d) { remap_field(d, ws, ws == 12 ? 8 : 5, remap); });
    diff_file(PatchFileId::INTERP_WAYS, "interp_ways.bin",
        [&, is](std::vector<char>& d) { remap_field(d, is, is >= 20 ? 8 : 5, remap); });
    diff_file(PatchFileId::ADMIN_POLYGONS, "admin_polygons.bin",
        [&, as](std::vector<char>& d) { remap_field(d, as, 8, remap); });

    std::function<void(std::vector<char>&)> no_remap;
    diff_file(PatchFileId::STREET_NODES, "street_nodes.bin", no_remap);
    diff_file(PatchFileId::INTERP_NODES, "interp_nodes.bin", no_remap);
    diff_file(PatchFileId::ADMIN_VERTICES, "admin_vertices.bin", no_remap);
    diff_file(PatchFileId::GEO_CELLS, "geo_cells.bin", no_remap);
    diff_file(PatchFileId::STREET_ENTRIES, "street_entries.bin", no_remap);
    diff_file(PatchFileId::ADDR_ENTRIES, "addr_entries.bin", no_remap);
    diff_file(PatchFileId::INTERP_ENTRIES, "interp_entries.bin", no_remap);
    diff_file(PatchFileId::ADMIN_CELLS, "admin_cells.bin", no_remap);
    diff_file(PatchFileId::ADMIN_ENTRIES, "admin_entries.bin", no_remap);

    uint32_t end = 0xFFFFFFFF;
    write_val(pf, &end, 4);

    // Cleanup
    std::string rm_cmd = "rm -rf '" + tmpdir + "'";
    system(rm_cmd.c_str());

    auto total = pf.tellp();
    std::cerr << "\nTotal patch: " << total << " bytes (" << total / 1024 / 1024 << " MiB)" << std::endl;
    return 0;
}

#include <unordered_map>
#include <vector>
+#include <unistd.h>
#include "patch_format.h"
// --- String remap ---


default-src 'none'; frame-ancestors 'none'

_cfuvid=MYW.IbGUROIkkw0.aA4EpZPYUIj41NFpFUZ62Jjj9xU-1774609109.3155663-1.0.1.1-Imfp.RgXJjaUN9PhJNuPB074IUpQd2aBwsH1Ip529no; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com

Overloaded. https://docs.claude.com/en/api/errors


#include <unistd.h>
#include "patch_format.h"


The file /root/traccar-geocoder/builder/tools/geocoder_patch.cpp has been updated successfully.

// geocoder-patch: Apply a .gcpatch to a geocoder index directory.
//
// For each file: apply string remap to old, write temp, run zstd -d --patch-from.
//
// Usage: geocoder-patch <current-dir> <patch-file> -o <output-dir>

#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <iostream>
#include <string>
#include <unordered_map>
#include <vector>

#include "patch_format.h"

// --- String remap application ---

static void remap_addr_points(std::vector<char>& data,
                                const std::unordered_map<uint32_t,uint32_t>& rm) {
    for (size_t i = 0; i + 16 <= data.size(); i += 16) {
        for (size_t off : {8, 12}) {
            uint32_t v; memcpy(&v, data.data() + i + off, 4);
            auto it = rm.find(v);
            if (it != rm.end()) memcpy(data.data() + i + off, &it->second, 4);
        }
    }
}

static void remap_field(std::vector<char>& data, size_t stride, size_t field_off,
                          const std::unordered_map<uint32_t,uint32_t>& rm) {
    for (size_t i = 0; i + stride <= data.size(); i += stride) {
        uint32_t v; memcpy(&v, data.data() + i + field_off, 4);
        auto it = rm.find(v);
        if (it != rm.end()) memcpy(data.data() + i + field_off, &it->second, 4);
    }
}

int main(int argc, char* argv[]) {
    if (argc < 5 || std::string(argv[3]) != "-o") {
        std::cerr << "Usage: geocoder-patch <current-dir> <patch-file> -o <output-dir>" << std::endl;
        return 1;
    }
    std::string cur_dir = argv[1], patch_path = argv[2], out_dir = argv[4];
    ensure_dir(out_dir);

    std::string tmpdir = "/tmp/geocoder-patch-" + std::to_string(getpid());
    ensure_dir(tmpdir);

    std::ifstream pf(patch_path, std::ios::binary);
    if (!pf) { std::cerr << "Cannot open " << patch_path << std::endl; return 1; }

    // Read header
    char magic[8]; pf.read(magic, 8);
    if (memcmp(magic, GCPATCH_MAGIC, 8) != 0) {
        std::cerr << "Invalid patch file" << std::endl; return 1;
    }
    uint32_t version, flags;
    pf.read(reinterpret_cast<char*>(&version), 4);
    pf.read(reinterpret_cast<char*>(&flags), 4);
    if (version != GCPATCH_VERSION) {
        std::cerr << "Unsupported version " << version << std::endl; return 1;
    }

    // Read string remap
    std::unordered_map<uint32_t, uint32_t> str_remap;
    {
        uint32_t section_id; pf.read(reinterpret_cast<char*>(&section_id), 4);
        if (section_id != 0xFFFFFFFE) {
            std::cerr << "Expected remap section" << std::endl; return 1;
        }
        uint32_t count; pf.read(reinterpret_cast<char*>(&count), 4);
        for (uint32_t i = 0; i < count; i++) {
            uint32_t old_off, new_off;
            pf.read(reinterpret_cast<char*>(&old_off), 4);
            pf.read(reinterpret_cast<char*>(&new_off), 4);
            str_remap[old_off] = new_off;
        }
        std::cerr << "Loaded " << count << " string remap entries" << std::endl;
    }

    // Detect struct strides
    auto detect_stride = [&](const std::string& name, std::vector<size_t> candidates) -> size_t {
        auto data = read_file(cur_dir + "/" + name);
        for (size_t s : candidates)
            if (data.size() % s == 0 && data.size() > 0) return s;
        return candidates[0];
    };
    size_t way_stride = detect_stride("street_ways.bin", {12, 9});
    size_t interp_stride = detect_stride("interp_ways.bin", {20, 18});
    size_t admin_stride = detect_stride("admin_polygons.bin", {24, 20, 19});

    // Which files need string remap?
    auto needs_remap = [](uint32_t fid) -> bool {
        return fid == (uint32_t)PatchFileId::ADDR_POINTS ||
               fid == (uint32_t)PatchFileId::STREET_WAYS ||
               fid == (uint32_t)PatchFileId::INTERP_WAYS ||
               fid == (uint32_t)PatchFileId::ADMIN_POLYGONS;
    };

    // Process file sections
    while (pf) {
        uint32_t file_id; pf.read(reinterpret_cast<char*>(&file_id), 4);
        if (!pf || file_id == 0xFFFFFFFF) break;

        uint32_t encoding; pf.read(reinterpret_cast<char*>(&encoding), 4);
        uint64_t old_size, new_size, delta_size;
        pf.read(reinterpret_cast<char*>(&old_size), 8);
        pf.read(reinterpret_cast<char*>(&new_size), 8);
        pf.read(reinterpret_cast<char*>(&delta_size), 8);

        if (file_id >= (uint32_t)PatchFileId::COUNT) {
            pf.seekg(delta_size, std::ios::cur);
            continue;
        }
        const char* filename = patch_file_names[file_id];

        // Write delta data to temp file
        std::string zst_path = tmpdir + "/" + std::string(filename) + ".zst";
        {
            std::ofstream zf(zst_path, std::ios::binary);
            std::vector<char> buf(std::min(delta_size, (uint64_t)1024*1024));
            uint64_t remaining = delta_size;
            while (remaining > 0) {
                size_t chunk = std::min(remaining, (uint64_t)buf.size());
                pf.read(buf.data(), chunk);
                zf.write(buf.data(), chunk);
                remaining -= chunk;
            }
        }

        // Prepare reference file (old file, with remap if needed)
        std::string ref_path;
        if (needs_remap(file_id)) {
            auto old_data = read_file(cur_dir + "/" + std::string(filename));
            if (file_id == (uint32_t)PatchFileId::ADDR_POINTS)
                remap_addr_points(old_data, str_remap);
            else if (file_id == (uint32_t)PatchFileId::STREET_WAYS)
                remap_field(old_data, way_stride, way_stride == 12 ? 8 : 5, str_remap);
            else if (file_id == (uint32_t)PatchFileId::INTERP_WAYS)
                remap_field(old_data, interp_stride, interp_stride >= 20 ? 8 : 5, str_remap);
            else if (file_id == (uint32_t)PatchFileId::ADMIN_POLYGONS)
                remap_field(old_data, admin_stride, 8, str_remap);
            ref_path = tmpdir + "/" + std::string(filename) + ".ref";
            write_file(ref_path, old_data);
        } else {
            ref_path = cur_dir + "/" + std::string(filename);
        }

        // Apply delta: zstd -d --patch-from=ref delta -o output
        std::string out_path = out_dir + "/" + std::string(filename);
        std::string cmd = "zstd --patch-from='" + ref_path + "' -d '" + zst_path +
                          "' -o '" + out_path + "' -f --memory=4096MB --quiet 2>/dev/null";
        int ret = system(cmd.c_str());
        if (ret != 0) {
            std::cerr << "FAILED: " << filename << " (zstd exit " << ret << ")" << std::endl;
            return 1;
        }

        auto out_data = read_file(out_path);
        std::cerr << "  " << filename << ": " << out_data.size() << " bytes" << std::endl;

        // Cleanup temp files
        remove(zst_path.c_str());
        if (needs_remap(file_id)) remove(ref_path.c_str());
    }

    // Cleanup
    std::string rm_cmd = "rm -rf '" + tmpdir + "'";
    system(rm_cmd.c_str());

    std::cerr << "Patch applied. Output in " << out_dir << std::endl;
    return 0;
}

#include <unordered_map>
#include <vector>
+#include <unistd.h>
#include "patch_format.h"
// --- String remap application ---


Bash

cmake --build build -j$(nproc) --target geocoder-diff --target geocoder-patch 2>&1 | tail -5

Build tools


[100%] Linking CXX executable geocoder-diff
[100%] Built target geocoder-diff
[ 50%] Building CXX object CMakeFiles/geocoder-patch.dir/tools/geocoder_patch.cpp.o
[100%] Linking CXX executable geocoder-patch
[100%] Built target geocoder-patch


Now deploy and run the full Test 2: diff → patch → verify:


sshpass -p 'elon-is-insane' scp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" /root/traccar-geocoder/builder/build/geocoder-diff /root/traccar-geocoder/builder/build/geocoder-patch michtest@100.113.88.121:~/ 2>&1

Deploy diff and patch tools


Error: Exit code 1
Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
scp: dest open "./geocoder-diff": Failure
scp: failed to upload file /root/traccar-geocoder/builder/build/geocoder-diff to ~/


sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 'rm -f ~/geocoder-diff ~/geocoder-patch' 2>&1 && sshpass -p 'elon-is-insane' scp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" /root/traccar-geocoder/builder/build/geocoder-diff /root/traccar-geocoder/builder/build/geocoder-patch michtest@100.113.88.121:~/ 2>&1

Remove old binaries and deploy new ones


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.


sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 '
echo "=== TEST 2: Full round-trip ==="
echo "Step 1: Generate patch (det-A → det-new)"
rm -f ~/test2.gcpatch
time ~/geocoder-diff ~/det-A ~/det-new -o ~/test2.gcpatch 2>&1
echo ""
echo "Patch size: $(stat -c%s ~/test2.gcpatch) bytes ($(numfmt --to=iec $(stat -c%s ~/test2.gcpatch)))"
echo ""
echo "Step 2: Apply patch"
rm -rf ~/patched2
time ~/geocoder-patch ~/det-A ~/test2.gcpatch -o ~/patched2 2>&1
echo ""
echo "Step 3: Verify"
all_match=true
for f in ~/det-new/*.bin; do
    b=$(basename $f)
    if [ -f ~/patched2/$b ]; then
        if cmp -s "$f" ~/patched2/$b; then
            echo "  $b: MATCH"
        else
            echo "  $b: MISMATCH"
            all_match=false
        fi
    else
        echo "  $b: MISSING"
        all_match=false
    fi
done
$all_match && echo "ALL FILES MATCH" || echo "VERIFICATION FAILED"
' 2>&1

Full round-trip test with CLI-based diff/patch


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
=== TEST 2: Full round-trip ===
Step 1: Generate patch (det-A → det-new)
Building string remap...
  4980078 strings mapped
  Remap: 4982052 entries
  strings.bin: 71309 bytes (0.1% of 78 MiB)
  addr_points.bin: 3770551 bytes (0.3% of 1312 MiB)
  street_ways.bin: 71705073 bytes (30.7% of 222 MiB)
  interp_ways.bin: 68321 bytes (20.4% of 0 MiB)
  admin_polygons.bin: 4911851 bytes (45.4% of 10 MiB)
  street_nodes.bin: 6727404 bytes (0.5% of 1378 MiB)
  interp_nodes.bin: 1228 bytes (0.2% of 0 MiB)
  admin_vertices.bin: 535915 bytes (0.2% of 277 MiB)
  geo_cells.bin: 396408051 bytes (23.7% of 1596 MiB)
  street_entries.bin: 179530212 bytes (30.6% of 559 MiB)
  addr_entries.bin: 312948034 bytes (79.2% of 376 MiB)
  interp_entries.bin: 60392 bytes (37.9% of 0 MiB)
  admin_cells.bin: 469093 bytes (27.7% of 1 MiB)
  admin_entries.bin: 2485930 bytes (40.6% of 5 MiB)

Total patch: 1019550256 bytes (972 MiB)

real	0m19.750s
user	0m22.214s
sys	0m7.022s
Patch size: 1019550256 bytes (973M)

Step 2: Apply patch
Loaded 4982052 string remap entries
FAILED: strings.bin (zstd exit 256)

Step 3: Verify

real	0m1.689s
user	0m1.532s
sys	0m0.157s
  addr_entries.bin: MISSING
  addr_points.bin: MISSING
  admin_cells.bin: MISSING
  admin_entries.bin: MISSING
  admin_polygons.bin: MISSING
  admin_vertices.bin: MISSING
  geo_cells.bin: MISSING
  interp_entries.bin: MISSING
  interp_nodes.bin: MISSING
  interp_ways.bin: MISSING
  street_entries.bin: MISSING
  street_nodes.bin: MISSING
  street_ways.bin: MISSING
  strings.bin: MISSING
VERIFICATION FAILED


_cfuvid=kiThSZlzWFAFTqIb6XINtnTZ1ennAXVS1PbaYHcxWIQ-1774609244.9698393-1.0.1.1-ATa5wG7leFe5wCIGU1Vmv23Or_p4zEkmQVGAnLQ91YQ; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com


The patch application failed for strings.bin. Let me debug the zstd command:


sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 '
# Manual test: extract strings.bin delta from patch, try to apply
mkdir -p /tmp/test-patch
# Extract the strings.bin section from the patch by running diff again for just strings
zstd --patch-from=~/det-A/strings.bin ~/det-new/strings.bin -o /tmp/test-patch/strings.bin.zst -f 2>&1
echo "Delta: $(stat -c%s /tmp/test-patch/strings.bin.zst) bytes"
# Try to decompress
zstd --patch-from=~/det-A/strings.bin -d /tmp/test-patch/strings.bin.zst -o /tmp/test-patch/strings.bin -f --memory=4096MB 2>&1
echo "Result: $(stat -c%s /tmp/test-patch/strings.bin 2>/dev/null) bytes"
cmp -s /tmp/test-patch/strings.bin ~/det-new/strings.bin && echo "MATCH" || echo "MISMATCH"
' 2>&1

Debug zstd patch application


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
zstd: error 31 : Stat failed on dictionary file ~/det-A/strings.bin: No such file or directory
Delta:  bytes
stat: cannot statx '/tmp/test-patch/strings.bin.zst': No such file or directory
error: numeric value overflows 32-bit unsigned int
Result:  bytes
MISMATCH


The `~` tilde isn't expanding inside the quoted string passed to `system()`. The diff tool is using quoted paths with `~` which doesn't work in `system()` calls. Let me fix by using absolute paths:


sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 'realpath ~/det-A ~/det-new' 2>&1

Check actual paths


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
/home/michtest/det-A
/home/michtest/det-new


The issue is that the `system()` call in the C++ tools passes paths with `~` which isn't expanded. But the paths come from `argv[]`, and when the user types `~/det-A`, the shell expands `~` before passing to the program. So `argv[1]` would already be `/home/michtest/det-A`. Let me test with absolute paths:


sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 '
echo "=== Retest with absolute paths ==="
rm -f /home/michtest/test2.gcpatch
time /home/michtest/geocoder-diff /home/michtest/det-A /home/michtest/det-new -o /home/michtest/test2.gcpatch 2>&1
echo ""
echo "Patch: $(numfmt --to=iec $(stat -c%s /home/michtest/test2.gcpatch))"
echo ""
rm -rf /home/michtest/patched2
time /home/michtest/geocoder-patch /home/michtest/det-A /home/michtest/test2.gcpatch -o /home/michtest/patched2 2>&1
echo ""
echo "=== Verify ==="
all_match=true
for f in /home/michtest/det-new/*.bin; do
    b=$(basename $f)
    p=/home/michtest/patched2/$b
    if [ -f "$p" ]; then
        cmp -s "$f" "$p" && echo "  $b: MATCH" || { echo "  $b: MISMATCH"; all_match=false; }
    else
        echo "  $b: MISSING"; all_match=false
    fi
done
$all_match && echo "ALL FILES MATCH" || echo "VERIFICATION FAILED"
' 2>&1

Full round-trip with absolute paths


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
=== Retest with absolute paths ===
Building string remap...
  4980078 strings mapped
  Remap: 4982052 entries
  strings.bin: 71309 bytes (0.1% of 78 MiB)
  addr_points.bin: 3770551 bytes (0.3% of 1312 MiB)
  street_ways.bin: 71705073 bytes (30.7% of 222 MiB)
  interp_ways.bin: 68321 bytes (20.4% of 0 MiB)
  admin_polygons.bin: 4911851 bytes (45.4% of 10 MiB)
  street_nodes.bin: 6727404 bytes (0.5% of 1378 MiB)
  interp_nodes.bin: 1228 bytes (0.2% of 0 MiB)
  admin_vertices.bin: 535915 bytes (0.2% of 277 MiB)
  geo_cells.bin: 396408051 bytes (23.7% of 1596 MiB)
  street_entries.bin: 179530212 bytes (30.6% of 559 MiB)
  addr_entries.bin: 312948034 bytes (79.2% of 376 MiB)
  interp_entries.bin: 60392 bytes (37.9% of 0 MiB)
  admin_cells.bin: 469093 bytes (27.7% of 1 MiB)
  admin_entries.bin: 2485930 bytes (40.6% of 5 MiB)

Total patch: 1019550256 bytes (972 MiB)

real	0m18.919s
user	0m22.256s
sys	0m6.138s
Patch: 973M

Loaded 4982052 string remap entries
FAILED: strings.bin (zstd exit 256)

=== Verify ===
  addr_entries.bin: MISSING

real	0m1.617s
user	0m1.520s
sys	0m0.096s
  addr_points.bin: MISSING
  admin_cells.bin: MISSING
  admin_entries.bin: MISSING
  admin_polygons.bin: MISSING
  admin_vertices.bin: MISSING
  geo_cells.bin: MISSING
  interp_entries.bin: MISSING
  interp_nodes.bin: MISSING
  interp_ways.bin: MISSING
  street_entries.bin: MISSING
  street_nodes.bin: MISSING
  street_ways.bin: MISSING
  strings.bin: MISSING
VERIFICATION FAILED


Still failing on strings.bin. The zstd delta was written by the diff tool and extracted by the patch tool, but the decompression fails. The issue is likely that the patch tool extracts the zstd frame to a temp file, but the `zstd -d --patch-from` command syntax may be wrong. Let me debug:


sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 '
# Direct test: compress with patch-from, then decompress
zstd --patch-from=/home/michtest/det-A/strings.bin /home/michtest/det-new/strings.bin -o /tmp/str.zst -f 2>&1
echo "Compressed: $(stat -c%s /tmp/str.zst) bytes"
# Decompress
zstd --patch-from=/home/michtest/det-A/strings.bin -d /tmp/str.zst -o /tmp/str.out -f 2>&1
echo "Decompressed: $(stat -c%s /tmp/str.out) bytes"
cmp -s /tmp/str.out /home/michtest/det-new/strings.bin && echo "MATCH" || echo "MISMATCH"
rm -f /tmp/str.zst /tmp/str.out
' 2>&1

Test zstd patch-from compress/decompress manually


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
long mode automatically triggered
/home/michtest/det-new/strings.bin :  0.09%   (  78.7 MiB =>   69.6 KiB, /tmp/str.zst)
Compressed: 71309 bytes
/tmp/str.zst        : 82573397 bytes
Decompressed: 82573397 bytes
MATCH


OK, the zstd CLI works perfectly. The issue must be in how the patch tool extracts the zstd frame from the .gcpatch file. The delta data might be getting corrupted during extraction. Let me check if the sizes match:

sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 '
# Check the first section in the patch file
python3 -c "
import struct
f = open(\"/home/michtest/test2.gcpatch\", \"rb\")
magic = f.read(8)
version, flags = struct.unpack(\"<II\", f.read(8))
print(f\"Magic: {magic}, version: {version}, flags: {flags}\")

# Remap section
marker = struct.unpack(\"<I\", f.read(4))[0]
count = struct.unpack(\"<I\", f.read(4))[0]
print(f\"Remap: marker=0x{marker:08X}, count={count}\")
f.seek(4 + 4 + count * 8, 1)  # skip remap data... wait, no offset
" 2>/dev/null || echo "python3 not available, checking header manually"
# Just check that the patch starts correctly
xxd /home/michtest/test2.gcpatch | head -3
' 2>&1

Check patch file structure


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
Magic: b'GCPATCH\x00', version: 1, flags: 0
Remap: marker=0xFFFFFFFE, count=4982052
bash: line 17: xxd: command not found


The remap section has 4,982,052 entries × 8 bytes = 39,856,416 bytes of remap data. After reading the remap, the file position should be at: 16 (header) + 4 (marker) + 4 (count) + 39856416 (entries) = 39856440. Then the first file section starts.

The issue is likely in the patch tool's remap reading. Let me check — the diff tool writes `count` (4 bytes) then `entries` (count × 8 bytes). But the patch tool reads `count` then reads entries. Let me verify the offset calculation:

Looking at the patch tool code: it reads `section_id` (4), then `count` (4), then reads `count` entries of (4+4) bytes each. That's 4 + 4 + count*8 total. Should be correct.

But wait — the diff tool writes BOTH the marker AND count before the entries. The patch tool reads the marker, then count. But I see the diff also writes the `old_pool_size` field which the patch tool doesn't read! Let me check:


No matches found


OK the diff tool doesn't write `old_pool_size`. But the patch tool reads it:


_cfuvid=2W7uTvUBRmvXO5LePqGv21HZUPgeH9yBzdY.c8NHNbw-1774609405.524593-1.0.1.1-AGC8jmg6eFua.bF.wXIbPq7aGqGW9jXmuRqWxqcvL9Q; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com


No `old_pool_size` either. But let me check the older version from the API-based diff — it DID write it. The current CLI-based diff doesn't. Good, they're consistent.

The mismatch must be in the section reading. After the remap, the patch tool reads file sections. Let me check what the first file section looks like. The diff tool writes: marker(4) + count(4) + entries(count*8) = 39856424 bytes for remap. Then: fid(4) + enc(4) + old_size(8) + new_size(8) + delta_size(8) + delta(delta_size).

After reading remap, the file position in the patch tool should be at byte 39856440 (16 header + 4 marker + 4 count + 39856416 entries). Then it reads fid(4), enc(4), old_size(8), new_size(8), delta_size(8) = 32 bytes of section header, then delta_size bytes of data.

Let me verify this is correct by checking the actual byte offsets in the patch file. But first, let me look more carefully at the patch tool code to see if there's a reading bug:


    81→        std::cerr << "Loaded " << count << " string remap entries" << std::endl;
    82→    }
    83→
    84→    // Detect struct strides
    85→    auto detect_stride = [&](const std::string& name, std::vector<size_t> candidates) -> size_t {
    86→        auto data = read_file(cur_dir + "/" + name);
    87→        for (size_t s : candidates)
    88→            if (data.size() % s == 0 && data.size() > 0) return s;
    89→        return candidates[0];
    90→    };
    91→    size_t way_stride = detect_stride("street_ways.bin", {12, 9});
    92→    size_t interp_stride = detect_stride("interp_ways.bin", {20, 18});
    93→    size_t admin_stride = detect_stride("admin_polygons.bin", {24, 20, 19});
    94→
    95→    // Which files need string remap?
    96→    auto needs_remap = [](uint32_t fid) -> bool {
    97→        return fid == (uint32_t)PatchFileId::ADDR_POINTS ||
    98→               fid == (uint32_t)PatchFileId::STREET_WAYS ||
    99→               fid == (uint32_t)PatchFileId::INTERP_WAYS ||
   100→               fid == (uint32_t)PatchFileId::ADMIN_POLYGONS;
   101→    };
   102→
   103→    // Process file sections
   104→    while (pf) {
   105→        uint32_t file_id; pf.read(reinterpret_cast<char*>(&file_id), 4);

        std::cerr << "Loaded " << count << " string remap entries" << std::endl;
    }

    // Detect struct strides
    auto detect_stride = [&](const std::string& name, std::vector<size_t> candidates) -> size_t {
        auto data = read_file(cur_dir + "/" + name);
        for (size_t s : candidates)
            if (data.size() % s == 0 && data.size() > 0) return s;
        return candidates[0];
    };
    size_t way_stride = detect_stride("street_ways.bin", {12, 9});
    size_t interp_stride = detect_stride("interp_ways.bin", {20, 18});
    size_t admin_stride = detect_stride("admin_polygons.bin", {24, 20, 19});

    // Which files need string remap?
    auto needs_remap = [](uint32_t fid) -> bool {
        return fid == (uint32_t)PatchFileId::ADDR_POINTS ||
               fid == (uint32_t)PatchFileId::STREET_WAYS ||
               fid == (uint32_t)PatchFileId::INTERP_WAYS ||
               fid == (uint32_t)PatchFileId::ADMIN_POLYGONS;
    };

    // Process file sections
    while (pf) {
        uint32_t file_id; pf.read(reinterpret_cast<char*>(&file_id), 4);


I see — the patch tool reads the remap section with `marker(4)` but then reads `count(4)` immediately. The diff tool writes `marker(4)` then `count(4)` then `entries(count*8)`. The patch reads `marker(4)`, doesn't read any old_pool_size field, reads `count(4)`, reads `count*8` bytes of entries. This should be correct.

Wait, let me look at the diff tool more carefully. Does it write anything between the marker and count?


    87→    std::cerr << "Building string remap..." << std::endl;
    88→    auto old_strings = read_file(old_dir + "/strings.bin");
    89→    auto new_strings = read_file(new_dir + "/strings.bin");
    90→    auto remap = build_string_remap(old_strings, new_strings);
    91→    std::cerr << "  " << remap.size() << " strings mapped" << std::endl;
    92→
    93→    // Detect struct strides
    94→    auto detect_stride = [](const std::string& path, std::vector<size_t> candidates) -> size_t {
    95→        auto data = read_file(path);
    96→        for (size_t s : candidates)
    97→            if (data.size() % s == 0 && data.size() > 0) return s;
    98→        return candidates[0];
    99→    };
   100→    size_t way_stride = detect_stride(old_dir + "/street_ways.bin", {12, 9});
   101→    size_t interp_stride = detect_stride(old_dir + "/interp_ways.bin", {20, 18});
   102→    size_t admin_stride = detect_stride(old_dir + "/admin_polygons.bin", {24, 20, 19});
   103→
   104→    // Open patch file
   105→    std::ofstream pf(patch_path, std::ios::binary);
   106→    pf.write(GCPATCH_MAGIC, 8);

    std::cerr << "Building string remap..." << std::endl;
    auto old_strings = read_file(old_dir + "/strings.bin");
    auto new_strings = read_file(new_dir + "/strings.bin");
    auto remap = build_string_remap(old_strings, new_strings);
    std::cerr << "  " << remap.size() << " strings mapped" << std::endl;

    // Detect struct strides
    auto detect_stride = [](const std::string& path, std::vector<size_t> candidates) -> size_t {
        auto data = read_file(path);
        for (size_t s : candidates)
            if (data.size() % s == 0 && data.size() > 0) return s;
        return candidates[0];
    };
    size_t way_stride = detect_stride(old_dir + "/street_ways.bin", {12, 9});
    size_t interp_stride = detect_stride(old_dir + "/interp_ways.bin", {20, 18});
    size_t admin_stride = detect_stride(old_dir + "/admin_polygons.bin", {24, 20, 19});

    // Open patch file
    std::ofstream pf(patch_path, std::ios::binary);
    pf.write(GCPATCH_MAGIC, 8);


   108→    write_val(pf, &ver, 4);
   109→    write_val(pf, &flags, 4);
   110→
   111→    // Section: string remap
   112→    {
   113→        uint32_t marker = 0xFFFFFFFE;
   114→        write_val(pf, &marker, 4);
   115→        // Collect all remap entries (at string start positions)
   116→        std::vector<std::pair<uint32_t,uint32_t>> entries;
   117→        size_t pos = 0;
   118→        while (pos < old_strings.size()) {
   119→            uint32_t old_off = static_cast<uint32_t>(pos);
   120→            auto it = remap.find(old_off);
   121→            uint32_t new_off = (it != remap.end()) ? it->second : 0;
   122→            entries.push_back({old_off, new_off});
   123→            pos += strlen(old_strings.data() + pos) + 1;
   124→        }
   125→        uint32_t count = static_cast<uint32_t>(entries.size());
   126→        write_val(pf, &count, 4);
   127→        for (auto& [o, n] : entries) { write_val(pf, &o, 4); write_val(pf, &n, 4); }

    write_val(pf, &ver, 4);
    write_val(pf, &flags, 4);

    // Section: string remap
    {
        uint32_t marker = 0xFFFFFFFE;
        write_val(pf, &marker, 4);
        // Collect all remap entries (at string start positions)
        std::vector<std::pair<uint32_t,uint32_t>> entries;
        size_t pos = 0;
        while (pos < old_strings.size()) {
            uint32_t old_off = static_cast<uint32_t>(pos);
            auto it = remap.find(old_off);
            uint32_t new_off = (it != remap.end()) ? it->second : 0;
            entries.push_back({old_off, new_off});
            pos += strlen(old_strings.data() + pos) + 1;
        }
        uint32_t count = static_cast<uint32_t>(entries.size());
        write_val(pf, &count, 4);
        for (auto& [o, n] : entries) { write_val(pf, &o, 4); write_val(pf, &n, 4); }


_cfuvid=Z6brvzgDcqVDfTZnzXQp.XRH.kOeWmBT.ImTVw1xT.c-1774609460.280825-1.0.1.1-EgfTyBoBePIognTudmGtzsnGGHF0dYoEbJ2s3EAIqjA; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com


Diff writes: marker(4) + count(4) + entries(count*8). Patch reads: marker(4) + count(4) + entries(count*8). They match.

But wait — looking at the actual patch tool remap reading again:


    65→    }
    66→
    67→    // Read string remap
    68→    std::unordered_map<uint32_t, uint32_t> str_remap;
    69→    {
    70→        uint32_t section_id; pf.read(reinterpret_cast<char*>(&section_id), 4);
    71→        if (section_id != 0xFFFFFFFE) {
    72→            std::cerr << "Expected remap section" << std::endl; return 1;
    73→        }
    74→        uint32_t count; pf.read(reinterpret_cast<char*>(&count), 4);
    75→        for (uint32_t i = 0; i < count; i++) {
    76→            uint32_t old_off, new_off;
    77→            pf.read(reinterpret_cast<char*>(&old_off), 4);
    78→            pf.read(reinterpret_cast<char*>(&new_off), 4);
    79→            str_remap[old_off] = new_off;
    80→        }
    81→        std::cerr << "Loaded " << count << " string remap entries" << std::endl;
    82→    }
    83→
    84→    // Detect struct strides

    }

    // Read string remap
    std::unordered_map<uint32_t, uint32_t> str_remap;
    {
        uint32_t section_id; pf.read(reinterpret_cast<char*>(&section_id), 4);
        if (section_id != 0xFFFFFFFE) {
            std::cerr << "Expected remap section" << std::endl; return 1;
        }
        uint32_t count; pf.read(reinterpret_cast<char*>(&count), 4);
        for (uint32_t i = 0; i < count; i++) {
            uint32_t old_off, new_off;
            pf.read(reinterpret_cast<char*>(&old_off), 4);
            pf.read(reinterpret_cast<char*>(&new_off), 4);
            str_remap[old_off] = new_off;
        }
        std::cerr << "Loaded " << count << " string remap entries" << std::endl;
    }

    // Detect struct strides


This looks correct — reads marker(4), count(4), entries(count*8). Total bytes consumed: 8 + count*8 = 8 + 4982052*8 = 39856424 bytes for the remap section (plus the 16 header bytes = 39856440 total offset).

The next section starts at 39856440. The patch tool reads file_id(4), encoding(4), old_size(8), new_size(8), delta_size(8), then delta_size bytes. The file_id should be 0 (STRINGS).

Let me verify by reading the patch file at that offset:


sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 'python3 -c "
import struct
f = open(\"/home/michtest/test2.gcpatch\", \"rb\")
f.seek(0)
magic = f.read(8)
ver, flags = struct.unpack(\"<II\", f.read(8))
# Remap
marker = struct.unpack(\"<I\", f.read(4))[0]
count = struct.unpack(\"<I\", f.read(4))[0]
f.seek(count * 8, 1)  # skip entries
pos = f.tell()
print(f\"After remap, at byte {pos}\")
# Read first file section
fid, enc = struct.unpack(\"<II\", f.read(8))
old_sz, new_sz, delta_sz = struct.unpack(\"<QQQ\", f.read(24))
print(f\"File {fid}: enc={enc} old={old_sz} new={new_sz} delta={delta_sz}\")
# Read zstd magic from delta
zstd_magic = f.read(4)
print(f\"Delta starts with: {zstd_magic.hex()} (zstd magic: 28b52ffd)\")
"' 2>&1

Verify patch file byte layout


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
After remap, at byte 39856440
File 0: enc=1 old=82546573 new=82573397 delta=71309
Delta starts with: 28b52ffd (zstd magic: 28b52ffd)


The patch file structure is correct. The zstd frame is valid. The issue must be in how the patch tool writes or invokes zstd. Let me add stderr output to the zstd command in the patch tool:


Edit

        std::string cmd = "zstd --patch-from='" + ref_path + "' -d '" + zst_path +
                          "' -o '" + out_path + "' -f --memory=4096MB --quiet 2>/dev/null";

        std::string cmd = "zstd --patch-from='" + ref_path + "' -d '" + zst_path +
                          "' -o '" + out_path + "' -f --memory=4096MB";


The file /root/traccar-geocoder/builder/tools/geocoder_patch.cpp has been updated successfully.

        std::string cmd = "zstd --patch-from='" + ref_path + "' -d '" + zst_path +
                          "' -o '" + out_path + "' -f --memory=4096MB";

// geocoder-patch: Apply a .gcpatch to a geocoder index directory.
//
// For each file: apply string remap to old, write temp, run zstd -d --patch-from.
//
// Usage: geocoder-patch <current-dir> <patch-file> -o <output-dir>

#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <iostream>
#include <string>
#include <unordered_map>
#include <vector>

#include <unistd.h>
#include "patch_format.h"

// --- String remap application ---

static void remap_addr_points(std::vector<char>& data,
                                const std::unordered_map<uint32_t,uint32_t>& rm) {
    for (size_t i = 0; i + 16 <= data.size(); i += 16) {
        for (size_t off : {8, 12}) {
            uint32_t v; memcpy(&v, data.data() + i + off, 4);
            auto it = rm.find(v);
            if (it != rm.end()) memcpy(data.data() + i + off, &it->second, 4);
        }
    }
}

static void remap_field(std::vector<char>& data, size_t stride, size_t field_off,
                          const std::unordered_map<uint32_t,uint32_t>& rm) {
    for (size_t i = 0; i + stride <= data.size(); i += stride) {
        uint32_t v; memcpy(&v, data.data() + i + field_off, 4);
        auto it = rm.find(v);
        if (it != rm.end()) memcpy(data.data() + i + field_off, &it->second, 4);
    }
}

int main(int argc, char* argv[]) {
    if (argc < 5 || std::string(argv[3]) != "-o") {
        std::cerr << "Usage: geocoder-patch <current-dir> <patch-file> -o <output-dir>" << std::endl;
        return 1;
    }
    std::string cur_dir = argv[1], patch_path = argv[2], out_dir = argv[4];
    ensure_dir(out_dir);

    std::string tmpdir = "/tmp/geocoder-patch-" + std::to_string(getpid());
    ensure_dir(tmpdir);

    std::ifstream pf(patch_path, std::ios::binary);
    if (!pf) { std::cerr << "Cannot open " << patch_path << std::endl; return 1; }

    // Read header
    char magic[8]; pf.read(magic, 8);
    if (memcmp(magic, GCPATCH_MAGIC, 8) != 0) {
        std::cerr << "Invalid patch file" << std::endl; return 1;
    }
    uint32_t version, flags;
    pf.read(reinterpret_cast<char*>(&version), 4);
    pf.read(reinterpret_cast<char*>(&flags), 4);
    if (version != GCPATCH_VERSION) {
        std::cerr << "Unsupported version " << version << std::endl; return 1;
    }

    // Read string remap
    std::unordered_map<uint32_t, uint32_t> str_remap;
    {
        uint32_t section_id; pf.read(reinterpret_cast<char*>(&section_id), 4);
        if (section_id != 0xFFFFFFFE) {
            std::cerr << "Expected remap section" << std::endl; return 1;
        }
        uint32_t count; pf.read(reinterpret_cast<char*>(&count), 4);
        for (uint32_t i = 0; i < count; i++) {
            uint32_t old_off, new_off;
            pf.read(reinterpret_cast<char*>(&old_off), 4);
            pf.read(reinterpret_cast<char*>(&new_off), 4);
            str_remap[old_off] = new_off;
        }
        std::cerr << "Loaded " << count << " string remap entries" << std::endl;
    }

    // Detect struct strides
    auto detect_stride = [&](const std::string& name, std::vector<size_t> candidates) -> size_t {
        auto data = read_file(cur_dir + "/" + name);
        for (size_t s : candidates)
            if (data.size() % s == 0 && data.size() > 0) return s;
        return candidates[0];
    };
    size_t way_stride = detect_stride("street_ways.bin", {12, 9});
    size_t interp_stride = detect_stride("interp_ways.bin", {20, 18});
    size_t admin_stride = detect_stride("admin_polygons.bin", {24, 20, 19});

    // Which files need string remap?
    auto needs_remap = [](uint32_t fid) -> bool {
        return fid == (uint32_t)PatchFileId::ADDR_POINTS ||
               fid == (uint32_t)PatchFileId::STREET_WAYS ||
               fid == (uint32_t)PatchFileId::INTERP_WAYS ||
               fid == (uint32_t)PatchFileId::ADMIN_POLYGONS;
    };

    // Process file sections
    while (pf) {
        uint32_t file_id; pf.read(reinterpret_cast<char*>(&file_id), 4);
        if (!pf || file_id == 0xFFFFFFFF) break;

        uint32_t encoding; pf.read(reinterpret_cast<char*>(&encoding), 4);
        uint64_t old_size, new_size, delta_size;
        pf.read(reinterpret_cast<char*>(&old_size), 8);
        pf.read(reinterpret_cast<char*>(&new_size), 8);
        pf.read(reinterpret_cast<char*>(&delta_size), 8);

        if (file_id >= (uint32_t)PatchFileId::COUNT) {
            pf.seekg(delta_size, std::ios::cur);
            continue;
        }
        const char* filename = patch_file_names[file_id];

        // Write delta data to temp file
        std::string zst_path = tmpdir + "/" + std::string(filename) + ".zst";
        {
            std::ofstream zf(zst_path, std::ios::binary);
            std::vector<char> buf(std::min(delta_size, (uint64_t)1024*1024));
            uint64_t remaining = delta_size;
            while (remaining > 0) {
                size_t chunk = std::min(remaining, (uint64_t)buf.size());
                pf.read(buf.data(), chunk);
                zf.write(buf.data(), chunk);
                remaining -= chunk;
            }
        }

        // Prepare reference file (old file, with remap if needed)
        std::string ref_path;
        if (needs_remap(file_id)) {
            auto old_data = read_file(cur_dir + "/" + std::string(filename));
            if (file_id == (uint32_t)PatchFileId::ADDR_POINTS)
                remap_addr_points(old_data, str_remap);
            else if (file_id == (uint32_t)PatchFileId::STREET_WAYS)
                remap_field(old_data, way_stride, way_stride == 12 ? 8 : 5, str_remap);
            else if (file_id == (uint32_t)PatchFileId::INTERP_WAYS)
                remap_field(old_data, interp_stride, interp_stride >= 20 ? 8 : 5, str_remap);
            else if (file_id == (uint32_t)PatchFileId::ADMIN_POLYGONS)
                remap_field(old_data, admin_stride, 8, str_remap);
            ref_path = tmpdir + "/" + std::string(filename) + ".ref";
            write_file(ref_path, old_data);
        } else {
            ref_path = cur_dir + "/" + std::string(filename);
        }

        // Apply delta: zstd -d --patch-from=ref delta -o output
        std::string out_path = out_dir + "/" + std::string(filename);
        std::string cmd = "zstd --patch-from='" + ref_path + "' -d '" + zst_path +
                          "' -o '" + out_path + "' -f --memory=4096MB --quiet 2>/dev/null";
        int ret = system(cmd.c_str());
        if (ret != 0) {
            std::cerr << "FAILED: " << filename << " (zstd exit " << ret << ")" << std::endl;
            return 1;
        }

        auto out_data = read_file(out_path);
        std::cerr << "  " << filename << ": " << out_data.size() << " bytes" << std::endl;

        // Cleanup temp files
        remove(zst_path.c_str());
        if (needs_remap(file_id)) remove(ref_path.c_str());
    }

    // Cleanup
    std::string rm_cmd = "rm -rf '" + tmpdir + "'";
    system(rm_cmd.c_str());

    std::cerr << "Patch applied. Output in " << out_dir << std::endl;
    return 0;
}

-                          "' -o '" + out_path + "' -f --memory=4096MB --quiet 2>/dev/null";


_cfuvid=bzJdKTyNq2Ui_I3.e0Yv9MUeRIDYJ9h2Gibtd.nazc0-1774609499.0132964-1.0.1.1-21hG1ZusgCRNYVNna_qfKLoTl_jaIgz_rD.3n_7CAw4; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com


Bash

cmake --build build -j$(nproc) --target geocoder-patch 2>&1 | tail -3 && sshpass -p 'elon-is-insane' scp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" /root/traccar-geocoder/builder/build/geocoder-patch michtest@100.113.88.121:~/geocoder-patch 2>&1

Build and deploy patch tool with verbose errors


[ 50%] Building CXX object CMakeFiles/geocoder-patch.dir/tools/geocoder_patch.cpp.o
[100%] Linking CXX executable geocoder-patch
[100%] Built target geocoder-patch
Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.


sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 '
rm -rf /home/michtest/patched2
/home/michtest/geocoder-patch /home/michtest/det-A /home/michtest/test2.gcpatch -o /home/michtest/patched2 2>&1 | head -10
' 2>&1

Apply patch with verbose errors


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
Loaded 4982052 string remap entries
error: numeric value overflows 32-bit unsigned int
FAILED: strings.bin (zstd exit 256)


_cfuvid=wYauRoM2ZnE54zcsbk7fPAy4zw3p1HEKPA7CBG74hqw-1774609539.844374-1.0.1.1-bxv4nKpU8aBGoqkW5zCvzNHmrWPSLOpuFxLXx8KMfUo; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com


_cfuvid=U8sJ9WGOxWAZg9iBtxLk6nzGqJ4bvN2ye554H2ThBS0-1774609541.3922722-1.0.1.1-ED684fl5a5Ov4k0r0gpFSNAP8q6mbSK9UvHqY24S.dY; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com


_cfuvid=9lBIfKyryzEvo_8xhBlPUANQeUEz2WRTUNJBiAl4mao-1774610162.2236202-1.0.1.1-5ih7k4TDoPa9Lvz_yo4JedmYcQnOwpw84xFgUbapbsE; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com


`error: numeric value overflows 32-bit unsigned int` — this is zstd complaining about the `--memory=4096MB` flag. Let me fix:

Edit

        std::string cmd = "zstd --patch-from='" + ref_path + "' -d '" + zst_path +
                          "' -o '" + out_path + "' -f --memory=4096MB";

        std::string cmd = "zstd --patch-from='" + ref_path + "' -d '" + zst_path +
                          "' -o '" + out_path + "' -f";


        std::string cmd = "zstd --patch-from='" + ref_path + "' -d '" + zst_path +
                          "' -o '" + out_path + "' -f";

// geocoder-patch: Apply a .gcpatch to a geocoder index directory.
//
// For each file: apply string remap to old, write temp, run zstd -d --patch-from.
//
// Usage: geocoder-patch <current-dir> <patch-file> -o <output-dir>

#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <iostream>
#include <string>
#include <unordered_map>
#include <vector>

#include <unistd.h>
#include "patch_format.h"

// --- String remap application ---

static void remap_addr_points(std::vector<char>& data,
                                const std::unordered_map<uint32_t,uint32_t>& rm) {
    for (size_t i = 0; i + 16 <= data.size(); i += 16) {
        for (size_t off : {8, 12}) {
            uint32_t v; memcpy(&v, data.data() + i + off, 4);
            auto it = rm.find(v);
            if (it != rm.end()) memcpy(data.data() + i + off, &it->second, 4);
        }
    }
}

static void remap_field(std::vector<char>& data, size_t stride, size_t field_off,
                          const std::unordered_map<uint32_t,uint32_t>& rm) {
    for (size_t i = 0; i + stride <= data.size(); i += stride) {
        uint32_t v; memcpy(&v, data.data() + i + field_off, 4);
        auto it = rm.find(v);
        if (it != rm.end()) memcpy(data.data() + i + field_off, &it->second, 4);
    }
}

int main(int argc, char* argv[]) {
    if (argc < 5 || std::string(argv[3]) != "-o") {
        std::cerr << "Usage: geocoder-patch <current-dir> <patch-file> -o <output-dir>" << std::endl;
        return 1;
    }
    std::string cur_dir = argv[1], patch_path = argv[2], out_dir = argv[4];
    ensure_dir(out_dir);

    std::string tmpdir = "/tmp/geocoder-patch-" + std::to_string(getpid());
    ensure_dir(tmpdir);

    std::ifstream pf(patch_path, std::ios::binary);
    if (!pf) { std::cerr << "Cannot open " << patch_path << std::endl; return 1; }

    // Read header
    char magic[8]; pf.read(magic, 8);
    if (memcmp(magic, GCPATCH_MAGIC, 8) != 0) {
        std::cerr << "Invalid patch file" << std::endl; return 1;
    }
    uint32_t version, flags;
    pf.read(reinterpret_cast<char*>(&version), 4);
    pf.read(reinterpret_cast<char*>(&flags), 4);
    if (version != GCPATCH_VERSION) {
        std::cerr << "Unsupported version " << version << std::endl; return 1;
    }

    // Read string remap
    std::unordered_map<uint32_t, uint32_t> str_remap;
    {
        uint32_t section_id; pf.read(reinterpret_cast<char*>(&section_id), 4);
        if (section_id != 0xFFFFFFFE) {
            std::cerr << "Expected remap section" << std::endl; return 1;
        }
        uint32_t count; pf.read(reinterpret_cast<char*>(&count), 4);
        for (uint32_t i = 0; i < count; i++) {
            uint32_t old_off, new_off;
            pf.read(reinterpret_cast<char*>(&old_off), 4);
            pf.read(reinterpret_cast<char*>(&new_off), 4);
            str_remap[old_off] = new_off;
        }
        std::cerr << "Loaded " << count << " string remap entries" << std::endl;
    }

    // Detect struct strides
    auto detect_stride = [&](const std::string& name, std::vector<size_t> candidates) -> size_t {
        auto data = read_file(cur_dir + "/" + name);
        for (size_t s : candidates)
            if (data.size() % s == 0 && data.size() > 0) return s;
        return candidates[0];
    };
    size_t way_stride = detect_stride("street_ways.bin", {12, 9});
    size_t interp_stride = detect_stride("interp_ways.bin", {20, 18});
    size_t admin_stride = detect_stride("admin_polygons.bin", {24, 20, 19});

    // Which files need string remap?
    auto needs_remap = [](uint32_t fid) -> bool {
        return fid == (uint32_t)PatchFileId::ADDR_POINTS ||
               fid == (uint32_t)PatchFileId::STREET_WAYS ||
               fid == (uint32_t)PatchFileId::INTERP_WAYS ||
               fid == (uint32_t)PatchFileId::ADMIN_POLYGONS;
    };

    // Process file sections
    while (pf) {
        uint32_t file_id; pf.read(reinterpret_cast<char*>(&file_id), 4);
        if (!pf || file_id == 0xFFFFFFFF) break;

        uint32_t encoding; pf.read(reinterpret_cast<char*>(&encoding), 4);
        uint64_t old_size, new_size, delta_size;
        pf.read(reinterpret_cast<char*>(&old_size), 8);
        pf.read(reinterpret_cast<char*>(&new_size), 8);
        pf.read(reinterpret_cast<char*>(&delta_size), 8);

        if (file_id >= (uint32_t)PatchFileId::COUNT) {
            pf.seekg(delta_size, std::ios::cur);
            continue;
        }
        const char* filename = patch_file_names[file_id];

        // Write delta data to temp file
        std::string zst_path = tmpdir + "/" + std::string(filename) + ".zst";
        {
            std::ofstream zf(zst_path, std::ios::binary);
            std::vector<char> buf(std::min(delta_size, (uint64_t)1024*1024));
            uint64_t remaining = delta_size;
            while (remaining > 0) {
                size_t chunk = std::min(remaining, (uint64_t)buf.size());
                pf.read(buf.data(), chunk);
                zf.write(buf.data(), chunk);
                remaining -= chunk;
            }
        }

        // Prepare reference file (old file, with remap if needed)
        std::string ref_path;
        if (needs_remap(file_id)) {
            auto old_data = read_file(cur_dir + "/" + std::string(filename));
            if (file_id == (uint32_t)PatchFileId::ADDR_POINTS)
                remap_addr_points(old_data, str_remap);
            else if (file_id == (uint32_t)PatchFileId::STREET_WAYS)
                remap_field(old_data, way_stride, way_stride == 12 ? 8 : 5, str_remap);
            else if (file_id == (uint32_t)PatchFileId::INTERP_WAYS)
                remap_field(old_data, interp_stride, interp_stride >= 20 ? 8 : 5, str_remap);
            else if (file_id == (uint32_t)PatchFileId::ADMIN_POLYGONS)
                remap_field(old_data, admin_stride, 8, str_remap);
            ref_path = tmpdir + "/" + std::string(filename) + ".ref";
            write_file(ref_path, old_data);
        } else {
            ref_path = cur_dir + "/" + std::string(filename);
        }

        // Apply delta: zstd -d --patch-from=ref delta -o output
        std::string out_path = out_dir + "/" + std::string(filename);
        std::string cmd = "zstd --patch-from='" + ref_path + "' -d '" + zst_path +
                          "' -o '" + out_path + "' -f --memory=4096MB";
        int ret = system(cmd.c_str());
        if (ret != 0) {
            std::cerr << "FAILED: " << filename << " (zstd exit " << ret << ")" << std::endl;
            return 1;
        }

        auto out_data = read_file(out_path);
        std::cerr << "  " << filename << ": " << out_data.size() << " bytes" << std::endl;

        // Cleanup temp files
        remove(zst_path.c_str());
        if (needs_remap(file_id)) remove(ref_path.c_str());
    }

    // Cleanup
    std::string rm_cmd = "rm -rf '" + tmpdir + "'";
    system(rm_cmd.c_str());

    std::cerr << "Patch applied. Output in " << out_dir << std::endl;
    return 0;
}


Bash

cmake --build build -j$(nproc) --target geocoder-patch 2>&1 | tail -3 && sshpass -p 'elon-is-insane' scp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" /root/traccar-geocoder/builder/build/geocoder-patch michtest@100.113.88.121:~/geocoder-patch 2>&1 && sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 '
rm -rf /home/michtest/patched2
time /home/michtest/geocoder-patch /home/michtest/det-A /home/michtest/test2.gcpatch -o /home/michtest/patched2 2>&1
echo "=== Verify ==="
all_match=true
for f in /home/michtest/det-new/*.bin; do
    b=$(basename $f)
    p=/home/michtest/patched2/$b
    if [ -f "$p" ]; then
        cmp -s "$f" "$p" && echo "  $b: MATCH" || { s1=$(stat -c%s "$f"); s2=$(stat -c%s "$p"); echo "  $b: MISMATCH ($s1 vs $s2)"; all_match=false; }
    else
        echo "  $b: MISSING"; all_match=false
    fi
done
$all_match && echo "ALL FILES MATCH" || echo "SOME DIFFER"
' 2>&1

Apply patch and verify


[ 50%] Building CXX object CMakeFiles/geocoder-patch.dir/tools/geocoder_patch.cpp.o
[100%] Linking CXX executable geocoder-patch
[100%] Built target geocoder-patch
Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
Loaded 4982052 string remap entries
/tmp/geocoder-patch-125366/strings.bin.zst: 82573397 bytes
  strings.bin: 82573397 bytes
/tmp/geocoder-patch-125366/addr_points.bin.zst : Decoding error (36) : Frame requires too much memory for decoding
/tmp/geocoder-patch-125366/addr_points.bin.zst : Window size larger than maximum : 1375841776 > 1374269280
/tmp/geocoder-patch-125366/addr_points.bin.zst : Use --long=31 or --memory=1313MB
FAILED: addr_points.bin (zstd exit 256)
=== Verify ===

real	0m3.427s
user	0m2.673s
sys	0m0.754s
  addr_entries.bin: MISSING
  addr_points.bin: MISSING
  admin_cells.bin: MISSING
  admin_entries.bin: MISSING
  admin_polygons.bin: MISSING
  admin_vertices.bin: MISSING
  geo_cells.bin: MISSING
  interp_entries.bin: MISSING
  interp_nodes.bin: MISSING
  interp_ways.bin: MISSING
  street_entries.bin: MISSING
  street_nodes.bin: MISSING
  street_ways.bin: MISSING
  strings.bin: MATCH
SOME DIFFER


strings.bin MATCH! Progress! Now addr_points needs `--long=31`. Let me fix:


Edit

        std::string cmd = "zstd --patch-from='" + ref_path + "' -d '" + zst_path +
                          "' -o '" + out_path + "' -f";

        std::string cmd = "zstd --patch-from='" + ref_path + "' -d '" + zst_path +
                          "' -o '" + out_path + "' -f --long=31";


        std::string cmd = "zstd --patch-from='" + ref_path + "' -d '" + zst_path +
                          "' -o '" + out_path + "' -f --long=31";

// geocoder-patch: Apply a .gcpatch to a geocoder index directory.
//
// For each file: apply string remap to old, write temp, run zstd -d --patch-from.
//
// Usage: geocoder-patch <current-dir> <patch-file> -o <output-dir>

#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <iostream>
#include <string>
#include <unordered_map>
#include <vector>

#include <unistd.h>
#include "patch_format.h"

// --- String remap application ---

static void remap_addr_points(std::vector<char>& data,
                                const std::unordered_map<uint32_t,uint32_t>& rm) {
    for (size_t i = 0; i + 16 <= data.size(); i += 16) {
        for (size_t off : {8, 12}) {
            uint32_t v; memcpy(&v, data.data() + i + off, 4);
            auto it = rm.find(v);
            if (it != rm.end()) memcpy(data.data() + i + off, &it->second, 4);
        }
    }
}

static void remap_field(std::vector<char>& data, size_t stride, size_t field_off,
                          const std::unordered_map<uint32_t,uint32_t>& rm) {
    for (size_t i = 0; i + stride <= data.size(); i += stride) {
        uint32_t v; memcpy(&v, data.data() + i + field_off, 4);
        auto it = rm.find(v);
        if (it != rm.end()) memcpy(data.data() + i + field_off, &it->second, 4);
    }
}

int main(int argc, char* argv[]) {
    if (argc < 5 || std::string(argv[3]) != "-o") {
        std::cerr << "Usage: geocoder-patch <current-dir> <patch-file> -o <output-dir>" << std::endl;
        return 1;
    }
    std::string cur_dir = argv[1], patch_path = argv[2], out_dir = argv[4];
    ensure_dir(out_dir);

    std::string tmpdir = "/tmp/geocoder-patch-" + std::to_string(getpid());
    ensure_dir(tmpdir);

    std::ifstream pf(patch_path, std::ios::binary);
    if (!pf) { std::cerr << "Cannot open " << patch_path << std::endl; return 1; }

    // Read header
    char magic[8]; pf.read(magic, 8);
    if (memcmp(magic, GCPATCH_MAGIC, 8) != 0) {
        std::cerr << "Invalid patch file" << std::endl; return 1;
    }
    uint32_t version, flags;
    pf.read(reinterpret_cast<char*>(&version), 4);
    pf.read(reinterpret_cast<char*>(&flags), 4);
    if (version != GCPATCH_VERSION) {
        std::cerr << "Unsupported version " << version << std::endl; return 1;
    }

    // Read string remap
    std::unordered_map<uint32_t, uint32_t> str_remap;
    {
        uint32_t section_id; pf.read(reinterpret_cast<char*>(&section_id), 4);
        if (section_id != 0xFFFFFFFE) {
            std::cerr << "Expected remap section" << std::endl; return 1;
        }
        uint32_t count; pf.read(reinterpret_cast<char*>(&count), 4);
        for (uint32_t i = 0; i < count; i++) {
            uint32_t old_off, new_off;
            pf.read(reinterpret_cast<char*>(&old_off), 4);
            pf.read(reinterpret_cast<char*>(&new_off), 4);
            str_remap[old_off] = new_off;
        }
        std::cerr << "Loaded " << count << " string remap entries" << std::endl;
    }

    // Detect struct strides
    auto detect_stride = [&](const std::string& name, std::vector<size_t> candidates) -> size_t {
        auto data = read_file(cur_dir + "/" + name);
        for (size_t s : candidates)
            if (data.size() % s == 0 && data.size() > 0) return s;
        return candidates[0];
    };
    size_t way_stride = detect_stride("street_ways.bin", {12, 9});
    size_t interp_stride = detect_stride("interp_ways.bin", {20, 18});
    size_t admin_stride = detect_stride("admin_polygons.bin", {24, 20, 19});

    // Which files need string remap?
    auto needs_remap = [](uint32_t fid) -> bool {
        return fid == (uint32_t)PatchFileId::ADDR_POINTS ||
               fid == (uint32_t)PatchFileId::STREET_WAYS ||
               fid == (uint32_t)PatchFileId::INTERP_WAYS ||
               fid == (uint32_t)PatchFileId::ADMIN_POLYGONS;
    };

    // Process file sections
    while (pf) {
        uint32_t file_id; pf.read(reinterpret_cast<char*>(&file_id), 4);
        if (!pf || file_id == 0xFFFFFFFF) break;

        uint32_t encoding; pf.read(reinterpret_cast<char*>(&encoding), 4);
        uint64_t old_size, new_size, delta_size;
        pf.read(reinterpret_cast<char*>(&old_size), 8);
        pf.read(reinterpret_cast<char*>(&new_size), 8);
        pf.read(reinterpret_cast<char*>(&delta_size), 8);

        if (file_id >= (uint32_t)PatchFileId::COUNT) {
            pf.seekg(delta_size, std::ios::cur);
            continue;
        }
        const char* filename = patch_file_names[file_id];

        // Write delta data to temp file
        std::string zst_path = tmpdir + "/" + std::string(filename) + ".zst";
        {
            std::ofstream zf(zst_path, std::ios::binary);
            std::vector<char> buf(std::min(delta_size, (uint64_t)1024*1024));
            uint64_t remaining = delta_size;
            while (remaining > 0) {
                size_t chunk = std::min(remaining, (uint64_t)buf.size());
                pf.read(buf.data(), chunk);
                zf.write(buf.data(), chunk);
                remaining -= chunk;
            }
        }

        // Prepare reference file (old file, with remap if needed)
        std::string ref_path;
        if (needs_remap(file_id)) {
            auto old_data = read_file(cur_dir + "/" + std::string(filename));
            if (file_id == (uint32_t)PatchFileId::ADDR_POINTS)
                remap_addr_points(old_data, str_remap);
            else if (file_id == (uint32_t)PatchFileId::STREET_WAYS)
                remap_field(old_data, way_stride, way_stride == 12 ? 8 : 5, str_remap);
            else if (file_id == (uint32_t)PatchFileId::INTERP_WAYS)
                remap_field(old_data, interp_stride, interp_stride >= 20 ? 8 : 5, str_remap);
            else if (file_id == (uint32_t)PatchFileId::ADMIN_POLYGONS)
                remap_field(old_data, admin_stride, 8, str_remap);
            ref_path = tmpdir + "/" + std::string(filename) + ".ref";
            write_file(ref_path, old_data);
        } else {
            ref_path = cur_dir + "/" + std::string(filename);
        }

        // Apply delta: zstd -d --patch-from=ref delta -o output
        std::string out_path = out_dir + "/" + std::string(filename);
        std::string cmd = "zstd --patch-from='" + ref_path + "' -d '" + zst_path +
                          "' -o '" + out_path + "' -f";
        int ret = system(cmd.c_str());
        if (ret != 0) {
            std::cerr << "FAILED: " << filename << " (zstd exit " << ret << ")" << std::endl;
            return 1;
        }

        auto out_data = read_file(out_path);
        std::cerr << "  " << filename << ": " << out_data.size() << " bytes" << std::endl;

        // Cleanup temp files
        remove(zst_path.c_str());
        if (needs_remap(file_id)) remove(ref_path.c_str());
    }

    // Cleanup
    std::string rm_cmd = "rm -rf '" + tmpdir + "'";
    system(rm_cmd.c_str());

    std::cerr << "Patch applied. Output in " << out_dir << std::endl;
    return 0;
}


_cfuvid=n9KZU1W6Kr2EN5mLYhXV6boDiR8ihwY..7TYnQz55rU-1774610198.025277-1.0.1.1-oHCKXWR7l5gyhIhBsA63tsMsgqh69wyn3oLdjP.Sumg; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com


Bash

cmake --build build -j$(nproc) --target geocoder-patch 2>&1 | tail -2 && sshpass -p 'elon-is-insane' scp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" /root/traccar-geocoder/builder/build/geocoder-patch michtest@100.113.88.121:~/geocoder-patch 2>&1 && sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 '
rm -rf /home/michtest/patched2
time /home/michtest/geocoder-patch /home/michtest/det-A /home/michtest/test2.gcpatch -o /home/michtest/patched2 2>&1
echo "=== Verify ==="
all_match=true
for f in /home/michtest/det-new/*.bin; do
    b=$(basename $f)
    p=/home/michtest/patched2/$b
    [ -f "$p" ] && cmp -s "$f" "$p" && echo "  $b: MATCH" || { echo "  $b: FAIL"; all_match=false; }
done
$all_match && echo "ALL FILES MATCH" || echo "SOME DIFFER"
echo "Patch size: $(numfmt --to=iec $(stat -c%s /home/michtest/test2.gcpatch))"
' 2>&1

Apply patch with --long=31 and verify


[100%] Linking CXX executable geocoder-patch
[100%] Built target geocoder-patch
Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
Loaded 4982052 string remap entries
/tmp/geocoder-patch-125417/strings.bin.zst: 82573397 bytes
  strings.bin: 82573397 bytes
/tmp/geocoder-patch-125417/addr_points.bin.zst : Decoding error (36) : Restored data doesn't match checksum
FAILED: addr_points.bin (zstd exit 256)
=== Verify ===
  addr_entries.bin: FAIL

real	0m4.750s
user	0m3.072s
sys	0m1.933s
  addr_points.bin: FAIL
  admin_cells.bin: FAIL
  admin_entries.bin: FAIL
  admin_polygons.bin: FAIL
  admin_vertices.bin: FAIL
  geo_cells.bin: FAIL
  interp_entries.bin: FAIL
  interp_nodes.bin: FAIL
  interp_ways.bin: FAIL
  street_entries.bin: FAIL
  street_nodes.bin: FAIL
  street_ways.bin: FAIL
  strings.bin: MATCH
SOME DIFFER
Patch size: 973M


_cfuvid=0W4.dcusMvzH2FNUKBEh1PRKPxk34M6gaZHn_UV96hA-1774610216.907048-1.0.1.1-zp3mqzQUQHDkBOFjbk9NiAbUFzUmZT6AqiANpBXPSi8; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com


_cfuvid=WapegZ8skCJFdzTmFvPpFMVP8MIAz9uOOsefv7OTj1w-1774610218.1693413-1.0.1.1-tdo8GFsu99UVdPBpz1LiIWKtKmr72JKKb9PoQxaOaIw; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com


`Restored data doesn't match checksum` — this means the decompression prefix (remapped old) doesn't match the prefix used during compression. The diff tool remaps old addr_points and uses the remapped version as prefix. The patch tool also remaps, but uses a *different* remap table construction (the diff uses `std::unordered_map::find`, the patch reads from the stored entries). They should produce the same remap, but maybe the order of entries matters or some entries are missing.

The issue: the diff tool's remap only includes strings that exist in both pools (`if (it != new_idx.end())`). Strings only in the old pool get no remap entry. In the diff tool, `remap.find(v)` returns end → no change. But in the patch tool, `str_remap[old_off] = new_off` for ALL entries (the diff tool writes ALL entries including strings with no match where `new_off = 0`). When the patch tool remaps, it maps strings-not-in-new to offset 0, but the diff tool left them unchanged.

This is the bug! The diff tool's `build_string_remap()` only adds entries for strings found in both pools. But the written remap table includes ALL strings (even those with `new_off = 0` for strings not found). The patch tool applies these `→ 0` remaps, corrupting the data.

Let me fix: only write remap entries where old_off != new_off, and skip missing strings:


   113→        uint32_t marker = 0xFFFFFFFE;
   114→        write_val(pf, &marker, 4);
   115→        // Collect all remap entries (at string start positions)
   116→        std::vector<std::pair<uint32_t,uint32_t>> entries;
   117→        size_t pos = 0;
   118→        while (pos < old_strings.size()) {
   119→            uint32_t old_off = static_cast<uint32_t>(pos);
   120→            auto it = remap.find(old_off);
   121→            uint32_t new_off = (it != remap.end()) ? it->second : 0;
   122→            entries.push_back({old_off, new_off});
   123→            pos += strlen(old_strings.data() + pos) + 1;
   124→        }
   125→        uint32_t count = static_cast<uint32_t>(entries.size());
   126→        write_val(pf, &count, 4);
   127→        for (auto& [o, n] : entries) { write_val(pf, &o, 4); write_val(pf, &n, 4); }

        uint32_t marker = 0xFFFFFFFE;
        write_val(pf, &marker, 4);
        // Collect all remap entries (at string start positions)
        std::vector<std::pair<uint32_t,uint32_t>> entries;
        size_t pos = 0;
        while (pos < old_strings.size()) {
            uint32_t old_off = static_cast<uint32_t>(pos);
            auto it = remap.find(old_off);
            uint32_t new_off = (it != remap.end()) ? it->second : 0;
            entries.push_back({old_off, new_off});
            pos += strlen(old_strings.data() + pos) + 1;
        }
        uint32_t count = static_cast<uint32_t>(entries.size());
        write_val(pf, &count, 4);
        for (auto& [o, n] : entries) { write_val(pf, &o, 4); write_val(pf, &n, 4); }


_cfuvid=fA6DCYZHMxOu5rc0Z3hsTjYQPzws0s6FrtaC2VT5eKU-1774610235.2371614-1.0.1.1-L1lwj6tM7GzmMIxZwOy_Bm_3F7GQPntXs.D5tYZwtOM; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com


The bug: when a string is only in the old pool (deleted), `new_off = 0`. The diff tool uses `remap.find(old_off)` which returns end → leaves the field unchanged. But the patch tool reads `new_off = 0` and remaps to 0.

Fix: the diff tool should write the IDENTITY mapping for strings not found in new pool (map to themselves), or the remap application should only apply entries where old_off != new_off. Let me fix both the diff and patch:


Edit

            uint32_t new_off = (it != remap.end()) ? it->second : 0;
            entries.push_back({old_off, new_off});

            uint32_t new_off = (it != remap.end()) ? it->second : old_off; // identity for deleted strings
            entries.push_back({old_off, new_off});


The file /root/traccar-geocoder/builder/tools/geocoder_diff.cpp has been updated successfully.

            uint32_t new_off = (it != remap.end()) ? it->second : old_off; // identity for deleted strings
            entries.push_back({old_off, new_off});

// geocoder-diff: Compare two deterministic geocoder builds, produce a .gcpatch.
//
// For each file: apply string remap to old, write temp, run zstd --patch-from.
// Package all per-file zstd patches + remap table into .gcpatch.
//
// Usage: geocoder-diff <old-dir> <new-dir> -o <patch-file>

#include <algorithm>
#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <string>
#include <unordered_map>
#include <vector>

#include <unistd.h>
#include "patch_format.h"

// --- String remap ---

static std::unordered_map<uint32_t, uint32_t> build_string_remap(
    const std::vector<char>& old_pool, const std::vector<char>& new_pool)
{
    std::unordered_map<std::string, uint32_t> new_idx;
    size_t pos = 0;
    while (pos < new_pool.size()) {
        const char* s = new_pool.data() + pos;
        size_t len = strlen(s);
        new_idx[std::string(s, len)] = static_cast<uint32_t>(pos);
        pos += len + 1;
    }
    std::unordered_map<uint32_t, uint32_t> remap;
    pos = 0;
    while (pos < old_pool.size()) {
        const char* s = old_pool.data() + pos;
        size_t len = strlen(s);
        auto it = new_idx.find(std::string(s, len));
        if (it != new_idx.end())
            remap[static_cast<uint32_t>(pos)] = it->second;
        pos += len + 1;
    }
    return remap;
}

// --- Remap functions ---

static void remap_addr_points(std::vector<char>& data, const std::unordered_map<uint32_t,uint32_t>& rm) {
    for (size_t i = 0; i + 16 <= data.size(); i += 16) {
        for (size_t off : {8, 12}) {
            uint32_t v; memcpy(&v, data.data() + i + off, 4);
            auto it = rm.find(v);
            if (it != rm.end()) memcpy(data.data() + i + off, &it->second, 4);
        }
    }
}

static void remap_field(std::vector<char>& data, size_t stride, size_t field_off,
                         const std::unordered_map<uint32_t,uint32_t>& rm) {
    for (size_t i = 0; i + stride <= data.size(); i += stride) {
        uint32_t v; memcpy(&v, data.data() + i + field_off, 4);
        auto it = rm.find(v);
        if (it != rm.end()) memcpy(data.data() + i + field_off, &it->second, 4);
    }
}

// --- Write helpers ---
static void write_val(std::ofstream& f, const void* data, size_t size) {
    f.write(reinterpret_cast<const char*>(data), size);
}

int main(int argc, char* argv[]) {
    if (argc < 5 || std::string(argv[3]) != "-o") {
        std::cerr << "Usage: geocoder-diff <old-dir> <new-dir> -o <patch-file>" << std::endl;
        return 1;
    }
    std::string old_dir = argv[1], new_dir = argv[2], patch_path = argv[4];

    // Create temp directory
    std::string tmpdir = "/tmp/geocoder-diff-" + std::to_string(getpid());
    ensure_dir(tmpdir);

    // Load string pools, build remap
    std::cerr << "Building string remap..." << std::endl;
    auto old_strings = read_file(old_dir + "/strings.bin");
    auto new_strings = read_file(new_dir + "/strings.bin");
    auto remap = build_string_remap(old_strings, new_strings);
    std::cerr << "  " << remap.size() << " strings mapped" << std::endl;

    // Detect struct strides
    auto detect_stride = [](const std::string& path, std::vector<size_t> candidates) -> size_t {
        auto data = read_file(path);
        for (size_t s : candidates)
            if (data.size() % s == 0 && data.size() > 0) return s;
        return candidates[0];
    };
    size_t way_stride = detect_stride(old_dir + "/street_ways.bin", {12, 9});
    size_t interp_stride = detect_stride(old_dir + "/interp_ways.bin", {20, 18});
    size_t admin_stride = detect_stride(old_dir + "/admin_polygons.bin", {24, 20, 19});

    // Open patch file
    std::ofstream pf(patch_path, std::ios::binary);
    pf.write(GCPATCH_MAGIC, 8);
    uint32_t ver = GCPATCH_VERSION, flags = 0;
    write_val(pf, &ver, 4);
    write_val(pf, &flags, 4);

    // Section: string remap
    {
        uint32_t marker = 0xFFFFFFFE;
        write_val(pf, &marker, 4);
        // Collect all remap entries (at string start positions)
        std::vector<std::pair<uint32_t,uint32_t>> entries;
        size_t pos = 0;
        while (pos < old_strings.size()) {
            uint32_t old_off = static_cast<uint32_t>(pos);
            auto it = remap.find(old_off);
            uint32_t new_off = (it != remap.end()) ? it->second : 0;
            entries.push_back({old_off, new_off});
            pos += strlen(old_strings.data() + pos) + 1;
        }
        uint32_t count = static_cast<uint32_t>(entries.size());
        write_val(pf, &count, 4);
        for (auto& [o, n] : entries) { write_val(pf, &o, 4); write_val(pf, &n, 4); }
        std::cerr << "  Remap: " << count << " entries" << std::endl;
    }

    // Helper: remap old file, write temp, run zstd --patch-from, package result
    auto diff_file = [&](PatchFileId id, const std::string& name,
                          std::function<void(std::vector<char>&)> remap_fn) {
        std::cerr << "  " << name << ": ";

        std::string old_path = old_dir + "/" + name;
        std::string new_path = new_dir + "/" + name;
        std::string ref_path;

        if (remap_fn) {
            // Remap old file, write to temp
            auto old_data = read_file(old_path);
            remap_fn(old_data);
            ref_path = tmpdir + "/" + name;
            write_file(ref_path, old_data);
        } else {
            ref_path = old_path;
        }

        // Run zstd --patch-from
        std::string zst_path = tmpdir + "/" + name + ".zst";
        std::string cmd = "zstd --patch-from='" + ref_path + "' '" + new_path +
                          "' -o '" + zst_path + "' -f --quiet 2>/dev/null";
        system(cmd.c_str());

        auto zst_data = read_file(zst_path);
        auto new_data = read_file(new_path);
        auto old_data = read_file(old_path);

        // Write section: file_id, encoding, old_size, new_size, delta_size, delta_data
        uint32_t fid = static_cast<uint32_t>(id);
        uint32_t enc = static_cast<uint32_t>(PatchEncoding::COPY_INSERT);
        uint64_t os = old_data.size(), ns = new_data.size(), ds = zst_data.size();
        write_val(pf, &fid, 4);
        write_val(pf, &enc, 4);
        write_val(pf, &os, 8);
        write_val(pf, &ns, 8);
        write_val(pf, &ds, 8);
        pf.write(zst_data.data(), zst_data.size());

        double pct = ns > 0 ? ds * 100.0 / ns : 0;
        std::cerr << ds << " bytes (" << std::fixed << std::setprecision(1)
                  << pct << "% of " << ns / 1024 / 1024 << " MiB)" << std::endl;

        // Clean temp files
        if (remap_fn) remove(ref_path.c_str());
        remove(zst_path.c_str());
    };

    // Diff all files
    size_t ws = way_stride, is = interp_stride, as = admin_stride;
    diff_file(PatchFileId::STRINGS, "strings.bin", {});
    diff_file(PatchFileId::ADDR_POINTS, "addr_points.bin",
        [&](std::vector<char>& d) { remap_addr_points(d, remap); });
    diff_file(PatchFileId::STREET_WAYS, "street_ways.bin",
        [&, ws](std::vector<char>& d) { remap_field(d, ws, ws == 12 ? 8 : 5, remap); });
    diff_file(PatchFileId::INTERP_WAYS, "interp_ways.bin",
        [&, is](std::vector<char>& d) { remap_field(d, is, is >= 20 ? 8 : 5, remap); });
    diff_file(PatchFileId::ADMIN_POLYGONS, "admin_polygons.bin",
        [&, as](std::vector<char>& d) { remap_field(d, as, 8, remap); });

    std::function<void(std::vector<char>&)> no_remap;
    diff_file(PatchFileId::STREET_NODES, "street_nodes.bin", no_remap);
    diff_file(PatchFileId::INTERP_NODES, "interp_nodes.bin", no_remap);
    diff_file(PatchFileId::ADMIN_VERTICES, "admin_vertices.bin", no_remap);
    diff_file(PatchFileId::GEO_CELLS, "geo_cells.bin", no_remap);
    diff_file(PatchFileId::STREET_ENTRIES, "street_entries.bin", no_remap);
    diff_file(PatchFileId::ADDR_ENTRIES, "addr_entries.bin", no_remap);
    diff_file(PatchFileId::INTERP_ENTRIES, "interp_entries.bin", no_remap);
    diff_file(PatchFileId::ADMIN_CELLS, "admin_cells.bin", no_remap);
    diff_file(PatchFileId::ADMIN_ENTRIES, "admin_entries.bin", no_remap);

    uint32_t end = 0xFFFFFFFF;
    write_val(pf, &end, 4);

    // Cleanup
    std::string rm_cmd = "rm -rf '" + tmpdir + "'";
    system(rm_cmd.c_str());

    auto total = pf.tellp();
    std::cerr << "\nTotal patch: " << total << " bytes (" << total / 1024 / 1024 << " MiB)" << std::endl;
    return 0;
}

-            uint32_t new_off = (it != remap.end()) ? it->second : 0;

+            uint32_t new_off = (it != remap.end()) ? it->second : old_off; // identity for deleted strings


_cfuvid=algBabqxE.C3lSl0UoFGRu1XxPLwa3mGDGAmWUAs.5k-1774610244.701436-1.0.1.1-VFNJ0n5RRaKBq4N3VJEIWaHvV8gLjognolc1lFrP2gU; HttpOnly; SameSite=None; Secure; Path=/; Domain=api.anthropic.com


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Also fix the remap application in the diff tool — when `remap.find()` returns end, leave the value unchanged (don't remap to 0):


    47→}
    48→
    49→// --- Remap functions ---
    50→
    51→static void remap_addr_points(std::vector<char>& data, const std::unordered_map<uint32_t,uint32_t>& rm) {
    52→    for (size_t i = 0; i + 16 <= data.size(); i += 16) {
    53→        for (size_t off : {8, 12}) {
    54→            uint32_t v; memcpy(&v, data.data() + i + off, 4);
    55→            auto it = rm.find(v);
    56→            if (it != rm.end()) memcpy(data.data() + i + off, &it->second, 4);
    57→        }
    58→    }
    59→}
    60→
    61→static void remap_field(std::vector<char>& data, size_t stride, size_t field_off,

}

// --- Remap functions ---

static void remap_addr_points(std::vector<char>& data, const std::unordered_map<uint32_t,uint32_t>& rm) {
    for (size_t i = 0; i + 16 <= data.size(); i += 16) {
        for (size_t off : {8, 12}) {
            uint32_t v; memcpy(&v, data.data() + i + off, 4);
            auto it = rm.find(v);
            if (it != rm.end()) memcpy(data.data() + i + off, &it->second, 4);
        }
    }
}

static void remap_field(std::vector<char>& data, size_t stride, size_t field_off,


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Good — the diff tool's remap functions use `if (it != rm.end())` which correctly skips unmatched strings. The issue was only in the written remap table (now fixed with identity mapping for deleted strings).

Now rebuild, deploy, and retest:


Bash

cmake --build build -j$(nproc) --target geocoder-diff --target geocoder-patch 2>&1 | tail -3 && sshpass -p 'elon-is-insane' scp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" /root/traccar-geocoder/builder/build/geocoder-diff /root/traccar-geocoder/builder/build/geocoder-patch michtest@100.113.88.121:~/ 2>&1

Build and deploy fixed tools


[100%] Linking CXX executable geocoder-diff
[100%] Built target geocoder-diff
[100%] Built target geocoder-patch
Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.


sshpass -p 'elon-is-insane' ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ProxyCommand="tailscale nc %h %p" michtest@100.113.88.121 '
rm -f /home/michtest/test2.gcpatch
/home/michtest/geocoder-diff /home/michtest/det-A /home/michtest/det-new -o /home/michtest/test2.gcpatch 2>&1
echo ""
rm -rf /home/michtest/patched2
/home/michtest/geocoder-patch /home/michtest/det-A /home/michtest/test2.gcpatch -o /home/michtest/patched2 2>&1
echo ""
echo "=== VERIFY ==="
all_match=true
for f in /home/michtest/det-new/*.bin; do
    b=$(basename $f)
    p=/home/michtest/patched2/$b
    [ -f "$p" ] && cmp -s "$f" "$p" && echo "  $b: MATCH" || { echo "  $b: FAIL"; all_match=false; }
done
$all_match && echo "ALL FILES MATCH" || echo "SOME DIFFER"
echo "Patch: $(numfmt --to=iec $(stat -c%s /home/michtest/test2.gcpatch))"
' 2>&1

Full round-trip with fixed remap


Warning: Permanently added '100.113.88.121' (ED25519) to the list of known hosts.
Building string remap...
  4980078 strings mapped
  Remap: 4982052 entries
  strings.bin: 71309 bytes (0.1% of 78 MiB)
  addr_points.bin: 3770551 bytes (0.3% of 1312 MiB)
  street_ways.bin: 71705073 bytes (30.7% of 222 MiB)
  interp_ways.bin: 68321 bytes (20.4% of 0 MiB)
  admin_polygons.bin: 4911851 bytes (45.4% of 10 MiB)
  street_nodes.bin: 6727404 bytes (0.5% of 1378 MiB)
  interp_nodes.bin: 1228 bytes (0.2% of 0 MiB)
  admin_vertices.bin: 535915 bytes (0.2% of 277 MiB)
  geo_cells.bin: 396408051 bytes (23.7% of 1596 MiB)
  street_entries.bin: 179530212 bytes (30.6% of 559 MiB)
  addr_entries.bin: 312948034 bytes (79.2% of 376 MiB)
  interp_entries.bin: 60392 bytes (37.9% of 0 MiB)
  admin_cells.bin: 469093 bytes (27.7% of 1 MiB)
  admin_entries.bin: 2485930 bytes (40.6% of 5 MiB)

Total patch: 1019550256 bytes (972 MiB)

Loaded 4982052 string remap entries
/tmp/geocoder-patch-125586/strings.bin.zst: 82573397 bytes
  strings.bin: 82573397 bytes
/tmp/geocoder-patch-125586/addr_points.bin.zst: 1375841776 bytes
  addr_points.bin: 1375841776 bytes
/tmp/geocoder-patch-125586/street_ways.bin.zst: 233626176 bytes
  street_ways.bin: 233626176 bytes
/tmp/geocoder-patch-125586/interp_ways.bin.zst: 335424 bytes
  interp_ways.bin: 335424 bytes
/tmp/geocoder-patch-125586/admin_polygons.bin.zst: 10820736 bytes
  admin_polygons.bin: 10820736 bytes
/tmp/geocoder-patch-125586/street_nodes.bin.zst: 1445600360 bytes
  street_nodes.bin: 1445600360 bytes
/tmp/geocoder-patch-125586/interp_nodes.bin.zst: 725184 bytes
  interp_nodes.bin: 725184 bytes
/tmp/geocoder-patch-125586/admin_vertices.bin.zst: 291061192 bytes
  admin_vertices.bin: 291061192 bytes
/tmp/geocoder-patch-125586/geo_cells.bin.zst: 1674295440 bytes
  geo_cells.bin: 1674295440 bytes
/tmp/geocoder-patch-125586/street_entries.bin.zst: 586571766 bytes
  street_entries.bin: 586571766 bytes
/tmp/geocoder-patch-125586/addr_entries.bin.zst: 395005236 bytes
  addr_entries.bin: 395005236 bytes
/tmp/geocoder-patch-125586/interp_entries.bin.zst: 159386 bytes
  interp_entries.bin: 159386 bytes
/tmp/geocoder-patch-125586/admin_cells.bin.zst: 1692000 bytes
  admin_cells.bin: 1692000 bytes
/tmp/geocoder-patch-125586/admin_entries.bin.zst: 6122260 bytes
  admin_entries.bin: 6122260 bytes
Patch applied. Output in /home/michtest/patched2

=== VERIFY ===
  addr_entries.bin: MATCH
  addr_points.bin: MATCH
  admin_cells.bin: MATCH
  admin_entries.bin: MATCH
  admin_polygons.bin: MATCH
  admin_vertices.bin: MATCH
  geo_cells.bin: MATCH
  interp_entries.bin: MATCH
  interp_nodes.bin: MATCH
  interp_ways.bin: MATCH
  street_entries.bin: MATCH
  street_nodes.bin: MATCH
  street_ways.bin: MATCH
  strings.bin: MATCH
ALL FILES MATCH
Patch: 973M


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**ALL 14 FILES MATCH!** The diff → patch round-trip is verified. The patched output is byte-identical to the fresh deterministic build.

The patch size is 973 MiB — larger than ideal because entry/cell files don't have record ID remapping yet. The data files with string remap are excellent:
- strings: 71 KB (0.1%)
- addr_points: 3.8 MiB (0.3%)
- street_nodes: 6.7 MiB (0.5%)
- admin_vertices: 536 KB (0.2%)

The remaining large components: geo_cells (396 MiB), addr_entries (313 MiB), street_entries (180 MiB), street_ways (72 MiB). These need record ID remapping which we proved works (down to 14 MiB total) but isn't integrated into the diff/patch tools yet.

**Key milestone: deterministic builds + working diff/patch pipeline with verified byte-identical output.** The framework is correct and ready for the record ID remap optimization.


<task-notification>
<task-id>bbnwakgvg</task-id>
<tool-use-id>toolu_013tYTgRsQKx8TkR3EnjHKWQ</tool-use-id>
<output-file>/tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/bbnwakgvg.output</output-file>
<status>completed</status>
<summary>Background command "Test determinism: build same PBF twice" completed (exit code 0)</summary>
</task-notification>
Read the output file to retrieve the result: /tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/bbnwakgvg.output


<task-notification>
<task-id>blra8at1o</task-id>
<tool-use-id>toolu_01QXWD6kKwuYsaVnrgPibjWA</tool-use-id>
<output-file>/tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/blra8at1o.output</output-file>
<status>completed</status>
<summary>Background command "Full round-trip: diff → patch → verify" completed (exit code 0)</summary>
</task-notification>
Read the output file to retrieve the result: /tmp/claude-0/-root-traccar-geocoder/af1c4baa-0f9a-4420-a8b3-ce20dc28c8b9/tasks/blra8at1o.output


Those are stale notifications from the earlier (now superseded) runs. The current state:

**Verified working:**
1. **Deterministic builds** — same PBF produces byte-identical output across runs (all 14 files + manifest match)
2. **Diff → Patch round-trip** — `geocoder-diff` + `geocoder-patch` produces output byte-identical to fresh build (all 14 files verified)

**Patch size: 973 MiB** (for 7 GiB Europe, 4 days of changes)

The 973 MiB breaks down as:
- **Already optimized** (string remap applied): 16 MiB total — strings 71KB, addr_points 3.8M, street_nodes 6.7M, admin_vertices 536K
- **Not yet optimized** (no record ID remap): 957 MiB — geo_cells 396M, addr_entries 313M, street_entries 180M, street_ways 72M

We proved earlier that adding record ID remapping brings the total to **14 MiB**. That logic just needs to be integrated into the diff/patch tools. The next steps are:

1. Add record ID remap to the diff tool (match records by content, build old→new ID mapping, remap entry files before zstd delta)
2. Test sequential patching (Test 3 from the plan — need a third Europe PBF)
3. Clean up prototype test files

Want me to continue with the record ID remap integration, or would you like to review what we have first?


keep going, feel free to make commits as chrckpoints


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Check git status


 M CMakeLists.txt
 M src/build_index.cpp
 M tools/simplification_map.html
?? build-presplit/
?? test/deep_compare.cpp
?? test/monaco_osmium_reference.txt
?? test/name_overlap.py
?? tools/comparison.geojson
?? tools/full_remap_test.cpp
?? tools/geocoder_canonicalize.cpp
?? tools/geocoder_diff.cpp
?? tools/geocoder_patch.cpp
?? tools/patch_format.h
?? tools/remap_test.cpp
?? tools/simplification_viewer.html


Let me commit the current working state first — deterministic builds + working diff/patch pipeline.


Check what changed


 builder/CMakeLists.txt                |  21 +++
 builder/src/build_index.cpp           | 247 +++++++++++++++++++++++++++++++++-
 builder/tools/simplification_map.html |  13 +-
 3 files changed, 276 insertions(+), 5 deletions(-)


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git add CMakeLists.txt src/build_index.cpp src/string_pool.h tools/patch_format.h tools/geocoder_diff.cpp tools/geocoder_patch.cpp tools/geocoder_canonicalize.cpp && git status --short

Stage core files


M  CMakeLists.txt
M  src/build_index.cpp
A  tools/geocoder_canonicalize.cpp
A  tools/geocoder_diff.cpp
A  tools/geocoder_patch.cpp
A  tools/patch_format.h
 M tools/simplification_map.html
?? build-presplit/
?? test/deep_compare.cpp
?? test/monaco_osmium_reference.txt
?? test/name_overlap.py
?? tools/comparison.geojson
?? tools/full_remap_test.cpp
?? tools/remap_test.cpp
?? tools/simplification_viewer.html


git commit -m "$(cat <<'EOF'
feat: deterministic builds + geocoder diff/patch pipeline

- Deterministic ordering in build_index.cpp: sort string pool
  alphabetically, sort addr_points/ways/interps/admin by canonical
  keys (content-based with float-bit tiebreakers). Same PBF input
  now produces byte-identical output across runs.

- geocoder-diff: compares two deterministic builds, applies string
  offset remapping to old data files, then uses zstd --patch-from
  for compact binary deltas. Produces .gcpatch files.

- geocoder-patch: applies .gcpatch by reading string remap table,
  remapping old data files, then applying zstd deltas. Output is
  byte-identical to a fresh build.

- geocoder-canonicalize: standalone tool to normalize any build to
  canonical format (used for testing, not required in pipeline).

- patch_format.h: shared definitions for the patch file format.

Verified: deterministic builds produce identical output, and the
diff→patch round-trip produces byte-identical results for all 14
index files.

Current patch size for Europe (4 days, 7 GiB): 973 MiB. Data files
with string remap are excellent (0.1-0.5%), but entry/cell files
need record ID remapping (proven to achieve 14 MiB total).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
EOF
)"

Commit checkpoint: deterministic builds + diff/patch pipeline