.

.vscode/settings.json

@@ -0,0 +1,7 @@
+{
+    "files.associations": {
+        "*.inja": "jinja-html",
+        "iosfwd": "cpp",
+        "fstream": "cpp"
+    }
+}

CMakeLists.txt

@@ -11,7 +11,7 @@ set(CMAKE_EXE_LINKER_FLAGS "-static")
 
 file(GLOB SOURCES "src/*.cpp")
 add_executable(dehydrate ${SOURCES})
-target_include_directories(dehydrate PRIVATE include)
+target_include_directories(dehydrate PRIVATE include contrib)
 
 # Optionally, include headers
 include_directories(include) 

src/generator.cpp

@@ -5,7 +5,7 @@
 #include <filesystem>
 #include <sstream>
 #include <vector>
-#include "../../contrib/xxhash.hpp"
+#include "xxhash.hpp"
 
 namespace fs = std::filesystem;
 
@@ -37,7 +37,15 @@ void generate_file_code(const std::string& source, const std::string& destfolder
 #include <string>
 #include <iostream>
 #include <iomanip>
-#include \"../../contrib/xxhash.hpp\"
+
+// Tiny dependency-free FNV-1a 64-bit hash
+static uint64_t fnv1a_64(const void* data, size_t len) {
+    const uint8_t* p = static_cast<const uint8_t*>(data);
+    uint64_t h = 0xcbf29ce484222325ULL;
+    for (size_t i = 0; i < len; ++i)
+        h = (h ^ p[i]) * 0x100000001b3ULL;
+    return h;
+}
 )cpp";
     cpp << "#include \"" << hppname << "\"\n";
     cpp << "namespace " << ns << " {\n";
@@ -61,10 +69,9 @@ bool recreate_file(std::string destination_folder) {
         std::ostringstream oss;
         oss << in.rdbuf();
         std::string data = oss.str();
-        auto h = XXH3_128bits(data.data(), data.size());
+        uint64_t h = fnv1a_64(data.data(), data.size());
         std::ostringstream hex;
-        for (size_t i = 0; i < sizeof(h); ++i)
+        hex << std::hex << std::setw(16) << std::setfill('0') << h;
-            hex << std::hex << std::setw(2) << std::setfill('0') << ((const unsigned char*)&h)[i];
         existing_hash = hex.str();
     }
     bool needs_write = !fs::exists(outpath) || existing_hash != file_hash;
@@ -117,7 +124,7 @@ void generate_folder_code(const std::string& source, const std::string& destfold
 #include <string>
 #include <iostream>
 #include <iomanip>
-#include \"../../contrib/xxhash.hpp\"
+#include "xxhash.hpp"
 )cpp";
     cpp << "#include \"" << hppname << "\"\n";
     cpp << "namespace " << ns << " {\n";
@@ -158,10 +165,9 @@ bool recreate_tree(std::string destination_folder) {
             std::ifstream in(outpath, std::ios::binary);
             std::ostringstream oss; oss << in.rdbuf();
             std::string data = oss.str();
-            auto h = XXH3_128bits(data.data(), data.size());
+            uint64_t h = XXH3_64bits(data.data(), data.size());
             std::ostringstream hex;
-            for (size_t i = 0; i < sizeof(h); ++i)
+            hex << std::hex << std::setw(16) << std::setfill('0') << h;
-                hex << std::hex << std::setw(2) << std::setfill('0') << ((const unsigned char*)&h)[i];
             existing_hash = hex.str();
         }
         bool needs_write = !fs::exists(outpath) || existing_hash != )cpp" << "hash_" << var << R"cpp(;

src/hash.cpp

@@ -1,20 +1,18 @@
 #include "hash.hpp"
-#include "../contrib/xxhash.hpp"
+#include "xxhash.hpp"
 #include <fstream>
 #include <sstream>
 #include <iomanip>
 
-static std::string to_hex(const void* data, size_t len) {
+static std::string to_hex64(uint64_t value) {
-    const unsigned char* p = static_cast<const unsigned char*>(data);
     std::ostringstream oss;
-    for (size_t i = 0; i < len; ++i)
+    oss << std::hex << std::setw(16) << std::setfill('0') << value;
-        oss << std::hex << std::setw(2) << std::setfill('0') << (int)p[i];
     return oss.str();
 }
 
 std::string hash_data(const std::string& data) {
-    auto h = XXH3_128bits(data.data(), data.size());
+    uint64_t h = XXH3_64bits(data.data(), data.size());
-    return to_hex(&h, sizeof(h));
+    return to_hex64(h);
 }
 
 std::string hash_file(const std::string& path) {